(new): expand runtime APIs

(fix): harden concurrent lifecycle
(tests): add regression coverage
(doc): update v1.2 guidance

.gitea/workflows/go-lint.yaml

@@ -9,6 +9,15 @@ jobs:
       - name: Checkout repository code
         uses: actions/checkout@v6
 
+      - name: Set up Go
+        uses: actions/setup-go@v6.5.0
+        with:
+          go-version: '1.26.6'
+          cache-dependency-path: go.sum
+
+      - name: Print toolchain version
+        run: go version
+
       - name: Verify formatting
         run: |
           files="$(gofmt -l .)"
@@ -25,4 +34,6 @@ jobs:
         run: go vet ./...
 
       - name: Run golangci-lint
-        run: golangci-lint run
+        uses: golangci/golangci-lint-action@v9.0.0
+        with:
+          version: v2.12.2

.gitignore

@@ -6,3 +6,4 @@ test/
 .codex
 .agents/
 .claude/
+review.md

.golangci.yml

@@ -2,7 +2,7 @@ version: "2"
 run:
   timeout: 5m
 linters:
-  disable-all: true
+  default: none
   enable:
     - errcheck
     - ineffassign

AGENTS.md

@@ -60,6 +60,11 @@ Each exported godoc comment must:
 - avoid repeating the signature mechanically;
 - stay high-signal and informative.
 
+### Telegram API documentation and versions
+- When writing or updating godoc for Telegram Bot API types, fields, methods, or helpers, verify the description against the official [Telegram Bot API documentation](https://core.telegram.org/bots/api). Preserve relevant API semantics such as HTML equivalents, accepted ranges, formats, and optionality.
+- Add a `Since: Bot API X.Y` paragraph to each exported type, function, and method introduced in a specific Bot API version, using the established `tgapi` format.
+- Add an inline `// Since: Bot API X.Y` comment to an exported struct field only when its Bot API version differs from that of the containing struct. For example, if `InputRichMessage` was introduced in Bot API 10.1 and its `Media` field in Bot API 10.2, annotate only the `Media` field; do not repeat the struct's version on its original fields.
+
 ### Unexported declarations
 Unexported types, funcs, methods, vars, and consts should generally not have godoc-style comments unless there is a strong reason.
 
@@ -115,8 +120,8 @@ Prefer the repository’s documented commands. If multiple choices exist, use th
 
 ## Breaking changes policy
 - The agent must detect potential breaking changes before editing public APIs.
-- Breaking changes are forbidden unless the selected target version is a new major version.
-- If the requested change is breaking and the user did not bump the major version, the agent must stop and warn that the change is not allowed under the current version.
+- Breaking changes are forbidden unless the selected target version is a new major version, or it's necessary(i.e. fixing not working feature).
+- If the requested change is breaking, not necessary to fix a non-working feature, and the user did not bump the major version, the agent must stop and warn that the change is not allowed under the current version.
 - In that case, the agent must offer only these options:
   1. do not make the breaking change;
   2. introduce a backward-compatible alternative such as a new method, function, type, or struct, but only if that keeps the codebase reasonably small and clear;

CHANGELOG.md

@@ -1,5 +1,127 @@
 # Changelog
 
+## v1.2.0
+
+### Added
+- Added cancelable background runners through `ContextRunnerFn` and `NewContextRunner`; existing `RunnerFn` and `NewRunner` remain available for compatibility.
+- Added validated inline-keyboard APIs: `InlineKeyboardButtonBuilder.Validate`/`Build`, `InlineKeyboard.Validate`/`GetValidated`, and `CallbackData.EncodeValidated`, with typed errors for invalid actions, callback-data length, and oversized rows.
+- Added bounded file-download helpers `GetFileByLinkLimit` and `GetFileByLinkLimitWithContext` with `ErrFileTooLarge`; existing unbounded and streaming helpers remain available.
+- Added strict root rich-message parsing through `UnmarshalRichMessageStrict` and structural rich JSON depth/node limits with `ErrRichJSONDepth` and `ErrRichJSONNodes`.
+- Added `APIOpts.SetMaxRetries` for Telegram 429 responses. Automatic JSON and multipart retries now default to at most three attempts after the initial request and return `ErrRetryLimit` when exhausted.
+- Added `SetChatPhotoWithContext` and the correctly pluralized `DeleteAllMessageReactionsWithContext`; the old singular compatibility alias remains deprecated until v2.
+- Added `PollAnswer.VoterUser` and `PollAnswer.VoterChatInfo` presence helpers without changing the v1 value-field layout.
+- Added typed runtime errors for invalid scene actions, nil handlers, recovered handler panics, oversized Telegram responses, and recovered worker-pool task panics.
+- Added `CommandScopeUpdateError` and command-generation validation errors so callers can inspect invalid commands, duplicate names, invalid descriptions, and partially updated Telegram scopes.
+- Added rich-message editing helpers `MessageContext.EditCallbackRich`, `MessageContext.UpsertKeyboardRich`, `AnswerMessage.EditRich`, and `AnswerMessage.EditRichKeyboard`, plus `AnswerMessage.RichHTML` for rendered rich content.
+- Added `NewBotWithAPI` for constructing a bot with a preconfigured, injectable Telegram API client.
+
+### Changed
+- Runtime observer callbacks now execute asynchronously in enqueue order on one bounded dispatcher instead of blocking update handlers and scene locks. Queue overflow drops events with sampled warnings, observer panics remain isolated, and shutdown cancels callback contexts, drains queued events, and reports callbacks that ignore cancellation.
+- Scene routing now holds a lock only for the active session key; updates without an active scene and unrelated user sessions in the same chat remain concurrent.
+- Multipart uploads now encode request bodies as streams instead of building a second complete in-memory copy for every attempt.
+- Logger replacement and app-data logger writer registration now follow the bot configuration freeze, reject nil values safely, and install bot-token redaction before publishing replacement loggers.
+- README and README_RU now document context runners, injectable API clients, bounded retries and downloads, streaming multipart uploads, keyboard validation, and asynchronous observer delivery.
+- Version metadata now reports `v1.2.0`.
+
+### Fixed
+- Fixed HTTP transport errors exposing the bot token through Bot API request and file-download URLs while preserving error-chain inspection.
+- Fixed per-chat rate-limiter lifecycle races with concurrent cleanup, cooldown waits ignoring a later extension, shorter 429 locks replacing longer locks, and busy chats consuming global capacity before obtaining chat capacity.
+- Fixed scene `AsUserError` values not reaching users and producing duplicate observer errors; scene step, command, payload, and message-fallback errors now follow one consistent error path.
+- Fixed nil and panicking command, payload, update, message-fallback, scene, and middleware callbacks breaking handler/observer lifecycles. Panics are recovered per invocation and matching finish/error events are emitted.
+- Fixed asynchronous middleware error events and policy events bypassing the runtime observer dispatcher.
+- Fixed Telegram MarkdownV2 custom emoji syntax, multiline expandable blockquotes, code/pre escaping, and unsafe code-fence language strings.
+- Fixed `MessageContext.BindArgs` accepting values outside the destination integer or floating-point width.
+- Fixed empty successful draft flushes leaving stale drafts in `DraftProvider`.
+- Fixed generated command descriptions outside Telegram's 1–256-character range, duplicate command names across plugins, trailing usage whitespace, and silent partial multi-scope updates.
+- Fixed inline keyboard auto-wrap after reducing `maxRow`; legacy non-positive unlimited rows remain compatible for v1.
+- Fixed Telegram API responses larger than 10 MiB being silently truncated before JSON parsing; they now return `ErrResponseTooLarge`.
+- Fixed unknown `SceneAction` values being treated as a normal unhandled result.
+- Fixed worker-pool task panics terminating a worker and leaving the caller without a result.
+- Fixed zero or negative Telegram `retry_after` values causing a tight retry loop.
+- Fixed Telegram JSON wire names for `provider_payment_charge_id`, `owned_gift_id`, `others_can_add_tasks`, `others_can_mark_tasks_as_done`, `available_reactions`, and `quote_parse_mode`.
+- Fixed `MessageContext` text, photo, caption, rich-message, and chat-action helpers omitting business connection identifiers; message-backed helpers now also reject missing chats instead of panicking, while inline edits remain supported without a chat-backed message.
+- Fixed chat-admin, chat-creator, and bot-admin policies ignoring cancellation and deadlines from the active `MessageContext`.
+- Fixed command parsing treating tabs and newlines as part of command names and matching addressed bot usernames case-sensitively.
+- Fixed nested `RichTextArray` values bypassing rich-message depth validation and renderer limits.
+- Fixed polling panics being reported only through telemetry while `RunWithContext` returned success.
+- Fixed asynchronous middleware outliving the bot runtime and normal middleware denials being reported as internal handler errors.
+- Fixed caller-owned or aliased bot loggers being closed by the framework, bot-owned aliases being closed more than once, and replaced internal loggers leaking resources.
+- Fixed configuration codecs and JSON option encoding panicking on nil inputs.
+
+### Documentation
+- Added field-level Godoc for the complete exported API surface, including official Telegram Bot API optionality, ranges, formats, and field semantics. The repository-wide AST audit now reports no undocumented exported declarations or struct fields.
+- Corrected draft-provider Godoc to avoid promising cryptographic unpredictability from `math/rand/v2` IDs.
+- Marked v1 compatibility surfaces that may change in v2: `PollAnswer` voter pointers, context-required runners, error-returning keyboard builders, strict rich-message parsing, lossless unknown rich types, bounded downloads, compatibility aliases, and corrected public field names.
+- Clarified that drop-overflow mode rejects outgoing API requests, one-shot asynchronous runners are awaited during shutdown, and pending uploads are drained by the shared API client.
+
+### CI
+- Pinned the lint workflow to Go `1.26.6`, `golangci/golangci-lint-action@v9.0.0`, and golangci-lint `v2.12.2` for reproducible analysis.
+
+### Tests
+- Added regression coverage for limiter concurrency and cooldown behavior, scene lock scope, all scene handler error paths, polling, handler, and worker panics, asynchronous observer delivery, cancellation, and bounded shutdown, asynchronous middleware lifecycle, logger ownership, runner and policy cancellation, nil configuration inputs, draft cleanup, command parsing, command validation and partial scopes, keyboard byte boundaries and rows, MarkdownV2 vectors, numeric binding boundaries, rich JSON and renderer depth limits, strict rich roots, rich-message editing, business-message helpers and photo replacement, bounded file downloads, retry caps, streaming multipart replay, and corrected Telegram wire keys.
+
+## v1.1.0
+
+### Breaking Changes
+- Fixed `Uploader.SendLivePhoto` and `Uploader.SendLivePhotoWithContext` to require both the live-photo video and its static image. The previous one-file signatures could not produce a valid `sendLivePhoto` request.
+
+### Bot API 10.1
+- Added rich message receiving support: `tgapi.RichMessage` on `Message.RichMessage` (`rich_message`), the full set of `RichText*`/`RichBlock*` wire types with official API names, and `UnmarshalRichText`/`UnmarshalRichBlock`/`UnmarshalRichMessage` parsers. Unknown text-bearing types retain their nested text through fallback wrappers while unmodeled fields are discarded.
+- Added rich message sending support: `tgapi.InputRichMessage`, `tgapi.SendRichMessage` params, and `API.SendRichMessage`/`API.SendRichMessageWithContext`.
+- Added rich message draft streaming: `API.SendRichMessageDraft`/`API.SendRichMessageDraftWithContext` for ephemeral ~30-second previews of partially generated messages.
+- Added rich message editing: `EditMessageText.RichMessage` (`InputRichMessage`); `Text` is now omitted from the request when empty so rich-only edits are valid.
+- Added `tgapi.InputRichMessageContent` for rich content in inline query results.
+- Added join request query support: `User.SupportsJoinRequestQueries`, `ChatFullInfo.GuardBot`, `ChatJoinRequest.QueryID`, `API.AnswerChatJoinRequestQuery` with `ChatJoinRequestQueryResult` constants (`JoinRequestApprove`/`JoinRequestDecline`/`JoinRequestQueue`), and `API.SendChatJoinRequestWebApp` (plus `WithContext` variants).
+- Added poll link media: the `tgapi.Link` type, `PollMedia.Link`, and the "link" type with `URL` on `InputPollOptionMedia`.
+
+### Bot API 10.2
+- Added block-based rich-message sending with `InputRichMessage.Blocks`, including animation, audio, photo, video, and voice-note input blocks. The `tgrich` package provides matching media constructors with optional block captions.
+- Added `InputRichMessage.Media` for media embedded in rich-message HTML or Markdown, with multipart `attach://` upload support.
+- Added multipart rich-message uploads through `Uploader.SendRichMessage`. Use `UploaderFile.SetAttachName` to match an `attach://` media reference; rich-message draft helpers reject direct uploads as required by Telegram.
+- Added ephemeral-message support: outgoing receiver and callback parameters, reply targets, message fields, edit and delete methods, and ephemeral bot commands. Added community service-message types and subscription update handling.
+
+### Added
+- Added documented `tgrich` constructors and block types for building input rich messages.
+- Added `tgrich.BuildHTML` and `tgrich.ToHTML` to validate input block trees, convert them to HTML rich messages, and collect URL, `file_id`, or multipart media references.
+- Added `MessageContext.RichAnswer(...)` and `MessageContext.RichAnswerKeyboard(...)` for validating and sending `tgrich` input blocks.
+- Added `UpdateTypeSubscription` routing and normalized message, user, and chat context for guest messages, deleted business messages, anonymous poll answers, reaction counts, managed bots, chat boosts, and subscription updates.
+- Added webhook secret-format validation and the exported `ErrBotWebhookOptsSecretTokenInvalid` sentinel.
+
+### Changed
+- `AutoGenerateCommandsForScope(nil)` now atomically replaces commands in Telegram's default scope without deleting the previous list first.
+- API debug logging now records redacted request JSON and response metadata instead of complete response bodies.
+- Scene updates sharing a user or chat session key are serialized, and duplicate scene names from later plugins are skipped with a warning.
+- Inline keyboard button builders now keep URL and callback actions mutually exclusive, and `InlineKeyboard.Get` returns independent markup data.
+- `NewBot` no longer aliases `BotOpts.Prefixes` or mutates `BotOpts.LoggerBasePath`.
+- README requirements now match the module's Go 1.26 directive.
+- Migrated the golangci-lint configuration to its v2 schema so the repository lint workflow runs again.
+- Added missing Godoc for exported error methods, enum constants, and all public Bot API 10.1/10.2 fields introduced in this release.
+
+### Fixed
+- Fixed JSON BotOpts environment placeholders corrupting or injecting JSON when values contain quotes, backslashes, or control characters.
+- Preserved checkbox state when converting list items to ordered lists and made generated HTML attribute ordering deterministic.
+- Added validation for rich-block type discriminators, heading sizes, list fields, table cells, map parameters, and media values.
+- Fixed generated webhook secrets using padded Base64 characters that Telegram rejects, stopped logging generated secrets, and added HTTP read and idle timeouts to the webhook server.
+- Fixed negative group and channel IDs receiving global rather than per-chat `retry_after` cooldowns.
+- Fixed rejected per-chat requests consuming global rate-limit capacity and draft construction consuming an extra rate-limit token before the API request.
+- Fixed subscription updates being decoded as `UpdateTypeUnknown`.
+- Fixed rich-text and rich-block decoding silently accepting malformed typed fields or a top-level `null` rich-text value.
+- Fixed `tgrich.BuildHTML` disabling Telegram entity detection and accepting the draft-only thinking block; `BuildDraftHTML` now provides the explicit draft path.
+- Fixed `tgrich.BuildHTML` silently losing explicit bank-card, mention, hashtag, cashtag, and bot-command values when their visible text differs.
+- Fixed API debug logs exposing webhook, payment, callback, passport, and managed-bot secrets.
+- Fixed panics and nil callbacks in asynchronous middleware terminating the process; failures now reach the logger and observer error stream.
+- Fixed multipart helpers attempting direct file uploads for rich-message drafts, which Telegram does not support; they now return `ErrRichMessageDraftUploadUnsupported`.
+- Fixed draft ID zero values and collisions overwriting tracked drafts, nil draft APIs panicking, and draft entity slices aliasing caller memory.
+- Fixed scene session payloads and returned inline keyboard markup aliasing mutable internal slices.
+- Recovered panics from runner callbacks so they are reported through normal runner and error observer events instead of terminating the process.
+
+### Tests
+- Added JSON regression coverage for rich-message embedded media and ephemeral send, edit, and delete parameters.
+- Added regression coverage for escaped environment placeholders and both required `sendLivePhoto` multipart fields.
+- Added regression coverage for API log redaction, same-session scene serialization, duplicate scene registration, async middleware failures, and rich entity preservation.
+- Added rich HTML renderer coverage for all input block and media types, multipart references, field validation, and Telegram's text, block, nesting, media, and table-width limits.
+- Added regression coverage for webhook token syntax, update context normalization, subscription routing, rate-limit capacity, draft ID collisions, runner panics, scene and keyboard aliasing, command replacement, and malformed rich JSON.
+
 ## v1.0.2
 
 ### Fixed

README.md

@@ -2,7 +2,7 @@
 
 ![Laniakea](assets/logo.jpg)
 
-[![Go Version](https://img.shields.io/badge/Go-1.24+-00ADD8?logo=go&style=flat-square)](https://go.dev/)
+[![Go Version](https://img.shields.io/badge/Go-1.26+-00ADD8?logo=go&style=flat-square)](https://go.dev/)
 [![License: GPL-3.0](https://img.shields.io/badge/License-GPL%203.0-blue.svg?style=flat-square)](LICENSE)
 ![Gitea Release](https://img.shields.io/gitea/v/release/ScuroNeko/Laniakea?gitea_url=https%3A%2F%2Fgit.scuroneko.dev&sort=semver&display_name=release&style=flat-square&color=purple&link=https%3A%2F%2Fgit.scuroneko.dev%2FScuroNeko%2FLaniakea%2Freleases)
 
@@ -120,6 +120,8 @@ func main() {
 9. `RunWebhookWithContext(...)`: Starts the bot-owned webhook runtime when Telegram should deliver updates over HTTP instead of long polling.
 10. A `Bot` instance is single-use. After `Run()`, `RunWithContext()`, or `RunWebhookWithContext()` returns, create a new bot instance for the next session.
 
+For tests or custom transports, use `NewBotWithAPI[T](opts, api)` with a preconfigured `*tgapi.API`. The bot takes ownership of that client and closes it from `Bot.Close`; API transport, retry, and rate-limit fields in `BotOpts` do not override the supplied client.
+
 ## File-Based Config
 
 `BotOpts` can also be loaded from or saved to config files through the file codec API.
@@ -217,6 +219,12 @@ This split keeps method intent explicit: JSON-only calls go through `API`, file
 
 For advanced cases, `tgapi.NewRequest(...)` and `tgapi.NewUploaderRequest(...)` remain public as low-level escape hatches. They are intentionally less safe than method-specific helpers: callers must supply the correct Telegram method name and compatible request/response types themselves.
 
+Automatic retries after Telegram `429` responses are bounded to three by
+default; configure the cap with `NewAPIOpts(...).SetMaxRetries(...)`. Multipart
+uploads stream the encoded request instead of duplicating the complete body in
+memory. For downloads with an unknown size, use `OpenFileByLinkWithContext` or
+set an explicit bound with `GetFileByLinkLimitWithContext`.
+
 ### App Data
 
 The `T` in `NewBot[T]` is a powerful feature. You can pass any type, but shared dependencies such as database pools, service containers, or API clients should usually use a pointer type.
@@ -273,7 +281,10 @@ plugin.Scene("signup").
 Runners are background tasks that execute alongside the bot runtime. They are registered before the bot starts and launched automatically when the bot starts.
 
 ```go
-import "time"
+import (
+    "context"
+    "time"
+)
 
 // One-shot runner — fires once in a goroutine when the bot starts (default).
 bot.AddRunner(
@@ -284,8 +295,8 @@ bot.AddRunner(
 
 // Periodic runner — fires every 10 minutes in a goroutine.
 bot.AddRunner(
-    laniakea.NewRunner("refresh-stats", func(b *laniakea.Bot[*MyDB]) error {
-        return b.GetAppData().RefreshStats()
+    laniakea.NewContextRunner("refresh-stats", func(ctx context.Context, b *laniakea.Bot[*MyDB]) error {
+        return b.GetAppData().RefreshStats(ctx)
     }).Every(10 * time.Minute),
 )
 
@@ -301,6 +312,9 @@ Builder methods:
 - `Async(bool) *Runner[T]` — if `true` (default), runs in a goroutine; if `false`, blocks runtime startup.
 - `Every(time.Duration) *Runner[T]` — sets the repeat interval. Zero (default) means run once; positive value repeats. Periodic runners require `Async(true)`.
 
+Prefer `NewContextRunner` for I/O and blocking work. Its context is canceled
+when polling or webhook execution stops, allowing shutdown to complete.
+
 ## 🧩 Middleware
 Middleware are functions that run before a command handler. They are perfect for cross-cutting concerns like logging, access control, rate limiting, or modifying the context.
 
@@ -350,7 +364,9 @@ func adminOnlyMiddleware(ctx *laniakea.MessageContext, db *MyDB) bool {
 
 ## ⚙️ Advanced Configuration
 - **Inline Keyboards**: Build keyboards using `laniakea.NewInlineKeyboardJSON`, `laniakea.NewInlineKeyboardBase64`, or `laniakea.NewInlineKeyboard`. `Bot.SetPayloadType(...)` defines the default payload format, and `InlineKeyboard.SetPayloadType(...)` overrides it for one keyboard.
+- **Keyboard Validation**: Call `InlineKeyboard.GetValidated()` before sending untrusted or dynamically generated callback payloads; Telegram limits `callback_data` to 1–64 bytes.
 - **Rate Limiting**: Pass a configured utils.RateLimiter via BotOpts to handle Telegram's rate limits gracefully.
+- **Observers**: Runtime observer callbacks are dispatched asynchronously in order through a bounded queue. Slow observers do not block handlers; overload drops events with sampled warnings, and shutdown drains queued events.
 - **Localization**: `L10n` is safe for concurrent use once attached to the bot.
 - **Custom Update Handlers**: Use `plugin.AddUpdateHandler(...)` for Telegram update types that are not part of the command/payload flow.
 - **Lifecycle**: `RunWithContext(...)` and `RunWebhookWithContext(...)` do not call `Close()` for you. Shut the bot down explicitly, and create a fresh `Bot` for the next run.

README_RU.md

@@ -2,7 +2,7 @@
 
 ![Laniakea](assets/logo.jpg)
 
-[![Go Version](https://img.shields.io/badge/Go-1.24+-00ADD8?logo=go&style=flat-square)](https://go.dev/)
+[![Go Version](https://img.shields.io/badge/Go-1.26+-00ADD8?logo=go&style=flat-square)](https://go.dev/)
 [![License: GPL-3.0](https://img.shields.io/badge/License-GPL%203.0-blue.svg?style=flat-square)](LICENSE)
 ![Gitea Release](https://img.shields.io/gitea/v/release/ScuroNeko/Laniakea?gitea_url=https%3A%2F%2Fgit.scuroneko.dev&sort=semver&display_name=release&style=flat-square&color=purple&link=https%3A%2F%2Fgit.scuroneko.dev%2FScuroNeko%2FLaniakea%2Freleases)
 
@@ -121,6 +121,8 @@ func main() {
 9. `RunWebhookWithContext(...)`: Запускает bot-owned webhook runtime, когда Telegram должен доставлять update по HTTP вместо long polling.
 10. Экземпляр `Bot` одноразовый. После завершения `Run()`, `RunWithContext()` или `RunWebhookWithContext()` для следующего запуска создавайте новый бот.
 
+Для тестов или собственного transport используй `NewBotWithAPI[T](opts, api)` с заранее настроенным `*tgapi.API`. Бот становится владельцем этого клиента и закрывает его в `Bot.Close`; настройки transport, retry и rate limit из `BotOpts` не переопределяют переданный клиент.
+
 ## Конфиг из файла
 
 `BotOpts` можно не только собирать вручную или из environment, но и загружать и сохранять через file codec API.
@@ -261,7 +263,10 @@ plugin.Scene("signup").
 Раннеры — фоновые задачи, которые выполняются вместе с bot runtime. Они регистрируются до запуска бота и автоматически запускаются при старте.
 
 ```go
-import "time"
+import (
+    "context"
+    "time"
+)
 
 // Одноразовый раннер — запускается один раз в горутине при старте (по умолчанию).
 bot.AddRunner(
@@ -272,8 +277,8 @@ bot.AddRunner(
 
 // Периодический раннер — запускается каждые 10 минут в горутине.
 bot.AddRunner(
-    laniakea.NewRunner("refresh-stats", func(b *laniakea.Bot[*MyDB]) error {
-        return b.GetAppData().RefreshStats()
+    laniakea.NewContextRunner("refresh-stats", func(ctx context.Context, b *laniakea.Bot[*MyDB]) error {
+        return b.GetAppData().RefreshStats(ctx)
     }).Every(10 * time.Minute),
 )
 
@@ -289,6 +294,9 @@ bot.AddRunner(
 - `Async(bool) *Runner[T]` — если `true` (по умолчанию), запускается в горутине; если `false`, блокирует запуск runtime.
 - `Every(time.Duration) *Runner[T]` — задаёт интервал повторного запуска. Ноль (по умолчанию) означает одноразовый запуск; положительное значение — периодический. Периодические раннеры требуют `Async(true)`.
 
+Для I/O и блокирующей работы предпочитайте `NewContextRunner`. Его context
+отменяется при остановке polling или webhook runtime, поэтому shutdown может завершиться.
+
 ### tgapi: API и Uploader
 
 В `tgapi` есть два клиента:
@@ -298,6 +306,13 @@ bot.AddRunner(
 
 Для продвинутых сценариев `tgapi.NewRequest(...)` и `tgapi.NewUploaderRequest(...)` остаются публичными low-level escape hatch API. Они менее безопасны, чем типизированные helper-методы: вызывающая сторона сама отвечает за корректное имя Telegram-метода и совместимые типы параметров/ответа.
 
+Автоматические повторы после ответа Telegram `429` по умолчанию ограничены
+тремя; предел настраивается через `NewAPIOpts(...).SetMaxRetries(...)`.
+Multipart upload кодируется потоком без второй полной копии request body в
+памяти. Для download неизвестного размера используйте
+`OpenFileByLinkWithContext` либо задайте явный предел через
+`GetFileByLinkLimitWithContext`.
+
 ## 🧩 Промежуточные слои (Middleware)
 Middleware — это функции, которые выполняются перед обработчиком команды. Они идеально подходят для сквозных задач, таких как логирование, контроль доступа, ограничение скорости запросов или модификация контекста.
 
@@ -347,7 +362,9 @@ func adminOnlyMiddleware(ctx *laniakea.MessageContext, db *MyDB) bool {
 
 ## ⚙️ Расширенная настройка
 - **Инлайн-клавиатуры**: Создавайте клавиатуры с помощью `laniakea.NewInlineKeyboardJSON`, `laniakea.NewInlineKeyboardBase64` или `laniakea.NewInlineKeyboard`. `Bot.SetPayloadType(...)` задаёт payload format по умолчанию, а `InlineKeyboard.SetPayloadType(...)` переопределяет его для конкретной клавиатуры.
+- **Валидация клавиатур**: Вызывайте `InlineKeyboard.GetValidated()` перед отправкой недоверенных или динамически собранных callback payload; Telegram ограничивает `callback_data` диапазоном 1–64 байта.
 - **Ограничение запросов**: Передайте настроенный `utils.RateLimiter` через `BotOpts` для корректной обработки лимитов Telegram.
+- **Observer**: Во время runtime callbacks observer выполняются асинхронно и по порядку через ограниченную очередь. Медленный observer не блокирует handlers; при переполнении события отбрасываются с редкими предупреждениями, а shutdown обрабатывает уже поставленные в очередь события.
 - **Локализация**: `L10n` безопасен для конкурентного использования после подключения к боту.
 - **Пользовательские update handlers**: Используйте `plugin.AddUpdateHandler(...)` для Telegram update types вне command/payload flow.
 - **Жизненный цикл**: `RunWithContext(...)` и `RunWebhookWithContext(...)` не вызывают `Close()` автоматически. Завершайте бот явно и создавайте новый `Bot` для следующего запуска.

bot.go

@@ -97,13 +97,17 @@ type Bot[T AppData] struct {
 	maxWorkers        int
 	pollTimeout       int // Long-polling timeout in seconds for getUpdates
 
-	logFormat     utils.LogFormat
-	logFormatter  *sneklog.Formatter
-	logger        *sneklog.Logger // Main bot logger (JSON stdout + optional file)
-	requestLogger *sneklog.Logger // Optional request-level API logging
-	useReqLogger  bool
-	webhookLogger *sneklog.Logger                // Webhook logger. Available only after Bot.RunWebhookWithContext.
-	extraLoggers  extypes.Slice[*sneklog.Logger] // API, Uploader, and custom loggers
+	logFormat            utils.LogFormat
+	logFormatter         *sneklog.Formatter
+	logger               *sneklog.Logger // Main bot logger (JSON stdout + optional file)
+	requestLogger        *sneklog.Logger // Optional request-level API logging
+	useReqLogger         bool
+	webhookLogger        *sneklog.Logger // Webhook logger. Available only after Bot.RunWebhookWithContext.
+	loggerOwned          bool
+	requestLoggerOwned   bool
+	webhookLoggerOwned   bool
+	detachedOwnedLoggers []*sneklog.Logger
+	extraLoggers         extypes.Slice[*sneklog.Logger] // API, Uploader, and custom loggers
 
 	plugins     []Plugin[T]     // Command/event handlers
 	middlewares []Middleware[T] // Pre-processing filters (sorted by order)
@@ -115,6 +119,7 @@ type Bot[T AppData] struct {
 	l10n          *L10n           // Localization manager
 	draftProvider *DraftProvider  // Draft message builder
 	observer      Observer        // Optional event observer for instrumentation
+	observerAsync *observerDispatcher
 
 	appData         T // Injected application data
 	hasAppData      bool
@@ -122,6 +127,7 @@ type Bot[T AppData] struct {
 
 	sessionStore       SessionStore // Session store for scene management
 	sceneScopePriority []SceneScope
+	sceneLocks         sceneKeyLocker
 
 	updateOffsetMu sync.Mutex
 	updateOffset   int                // Last processed update ID
@@ -129,6 +135,7 @@ type Bot[T AppData] struct {
 	updateQueue    chan *tgapi.Update // Internal queue for processing updates
 	runnerOnceWG   sync.WaitGroup     // Tracks one-time async runners
 	runnerBgWG     sync.WaitGroup     // Tracks background async runners
+	middlewareWG   sync.WaitGroup     // Tracks asynchronous middleware callbacks
 	runStateMu     sync.Mutex
 	running        bool
 	ran            bool
@@ -155,6 +162,20 @@ func (bot *Bot[T]) configMutable(method string) bool {
 //   - Sets up DraftProvider with random IDs
 //   - Adds API and Uploader loggers to extraLoggers
 func NewBot[T any](opts *BotOpts) (*Bot[T], error) {
+	return newBot[T](opts, nil)
+}
+
+// NewBotWithAPI creates a Bot using a preconfigured API client.
+// The Bot takes ownership of api and closes it from Bot.Close. API transport,
+// retry, and rate-limit fields in opts do not reconfigure the supplied client.
+func NewBotWithAPI[T any](opts *BotOpts, api *tgapi.API) (*Bot[T], error) {
+	if api == nil {
+		return nil, ErrAPIIsNil
+	}
+	return newBot[T](opts, api)
+}
+
+func newBot[T any](opts *BotOpts, api *tgapi.API) (*Bot[T], error) {
 	if opts == nil {
 		return nil, ErrOptsIsNil
 	}
@@ -180,18 +201,20 @@ func NewBot[T any](opts *BotOpts) (*Bot[T], error) {
 	// HTTP client timeout must exceed pollTimeout to avoid spurious deadline
 	// errors that the polling loop would misinterpret as context cancellation.
 	httpTimeout := time.Duration(pollTimeout)*time.Second + 60*time.Second
-	apiOpts := tgapi.NewAPIOpts(opts.Token).
-		SetAPIURL(opts.APIURL).
-		UseTestServer(opts.UseTestServer).
-		SetLimiter(limiter).
-		SetDropRateLimitOverflow(opts.DropRateLimitOverflow).
-		SetLogFormat(opts.LogFormat).
-		SetLogFormatter(opts.LogFormatter).
-		SetHTTPClient(&http.Client{Timeout: httpTimeout})
-	api := tgapi.NewAPI(apiOpts)
+	if api == nil {
+		apiOpts := tgapi.NewAPIOpts(opts.Token).
+			SetAPIURL(opts.APIURL).
+			UseTestServer(opts.UseTestServer).
+			SetLimiter(limiter).
+			SetDropRateLimitOverflow(opts.DropRateLimitOverflow).
+			SetLogFormat(opts.LogFormat).
+			SetLogFormatter(opts.LogFormatter).
+			SetHTTPClient(&http.Client{Timeout: httpTimeout})
+		api = tgapi.NewAPI(apiOpts)
+	}
 	uploader := tgapi.NewUploader(api)
 
-	prefixes := opts.Prefixes
+	prefixes := append([]string(nil), opts.Prefixes...)
 	if len(prefixes) == 0 {
 		prefixes = []string{"/"}
 	}
@@ -230,10 +253,11 @@ func NewBot[T any](opts *BotOpts) (*Bot[T], error) {
 	if len(opts.ErrorTemplate) > 0 {
 		bot.errorTemplate = opts.ErrorTemplate
 	}
-	if len(opts.LoggerBasePath) == 0 {
-		opts.LoggerBasePath = "./"
+	loggerOpts := *opts
+	if len(loggerOpts.LoggerBasePath) == 0 {
+		loggerOpts.LoggerBasePath = "./"
 	}
-	bot.initLoggers(opts)
+	bot.initLoggers(&loggerOpts)
 
 	if opts.FileConfigVersion > 0 && opts.FileConfigVersion < ConfigVersion {
 		bot.logger.Warnln(
@@ -262,21 +286,66 @@ func NewBot[T any](opts *BotOpts) (*Bot[T], error) {
 	return bot, nil
 }
 
-// SetLogger replaces the main bot logger.
+// SetLogger replaces the main bot logger before runtime starts.
 func (bot *Bot[T]) SetLogger(l *sneklog.Logger) *Bot[T] {
+	if !bot.configMutable("SetLogger") {
+		return bot
+	}
+	if l == nil {
+		if bot.logger != nil {
+			bot.logger.Warnln("SetLogger called with nil logger; nothing changed")
+		}
+		return bot
+	}
+	if l == bot.logger {
+		return bot
+	}
+	bot.addTokenReplacer(l)
+	bot.closeReplacedLogger(bot.logger, bot.loggerOwned, l, bot.requestLogger, bot.webhookLogger)
 	bot.logger = l
+	bot.loggerOwned = false
 	return bot
 }
 
-// SetRequestLogger replaces the request-level logger.
+// SetRequestLogger replaces the request-level logger before runtime starts.
 func (bot *Bot[T]) SetRequestLogger(l *sneklog.Logger) *Bot[T] {
+	if !bot.configMutable("SetRequestLogger") {
+		return bot
+	}
+	if l == nil {
+		if bot.logger != nil {
+			bot.logger.Warnln("SetRequestLogger called with nil logger; nothing changed")
+		}
+		return bot
+	}
+	if l == bot.requestLogger {
+		return bot
+	}
+	bot.addTokenReplacer(l)
+	bot.closeReplacedLogger(bot.requestLogger, bot.requestLoggerOwned, l, bot.logger, bot.webhookLogger)
 	bot.requestLogger = l
+	bot.requestLoggerOwned = false
 	return bot
 }
 
-// SetWebhookLogger replaces the webhook logger.
+// SetWebhookLogger replaces the webhook logger before runtime starts.
 func (bot *Bot[T]) SetWebhookLogger(l *sneklog.Logger) *Bot[T] {
+	if !bot.configMutable("SetWebhookLogger") {
+		return bot
+	}
+	if l == nil {
+		if bot.logger != nil {
+			bot.logger.Warnln("SetWebhookLogger called with nil logger; nothing changed")
+		}
+		return bot
+	}
+	if l == bot.webhookLogger {
+		return bot
+	}
+	bot.addTokenReplacer(l)
+	bot.closeReplacedLogger(bot.webhookLogger, bot.webhookLoggerOwned, l, bot.logger, bot.requestLogger)
 	bot.webhookLogger = l
+	bot.webhookLoggerOwned = false
 	return bot
 }
 
@@ -289,10 +358,11 @@ func (bot *Bot[T]) GetUploader() *tgapi.Uploader { return bot.uploader }
 // Close gracefully shuts down bot-owned resources.
 //
 // Close shuts down, in order:
+//   - The asynchronous observer dispatcher, after draining queued events
 //   - Registered plugins via Plugin.Close
 //   - Webhook logger (if initialized)
-//   - Uploader (waits for pending uploads)
-//   - API client internals
+//   - Uploader logger resources
+//   - API client internals, after pending API and upload requests complete
 //   - RequestLogger (if enabled)
 //   - Main logger
 //
@@ -312,17 +382,34 @@ func (bot *Bot[T]) Close() error {
 		}
 		e = append(e, err)
 	}
+	observerCtx, observerCancel := context.WithTimeout(context.Background(), observerShutdownTimeout)
+	logCloseErr(bot.stopObserverDispatcher(observerCtx))
+	observerCancel()
 
 	for _, p := range bot.plugins {
 		if err := p.Close(); err != nil {
 			e = append(e, err)
 		}
 	}
-	if bot.webhookLogger != nil {
-		if err := bot.webhookLogger.Close(); err != nil {
-			logCloseErr(err)
+	closedLoggers := make(map[*sneklog.Logger]struct{}, 3)
+	closeOwnedLogger := func(logger *sneklog.Logger, owned bool) {
+		if logger == nil || !owned {
+			return
 		}
+		if _, exists := closedLoggers[logger]; exists {
+			return
+		}
+		closedLoggers[logger] = struct{}{}
+		logCloseErr(logger.Close())
+	}
+	for _, logger := range bot.detachedOwnedLoggers {
+		closeOwnedLogger(logger, true)
+	}
+	bot.detachedOwnedLoggers = nil
+	if bot.webhookLogger != nil {
+		closeOwnedLogger(bot.webhookLogger, bot.webhookLoggerOwned)
 		bot.webhookLogger = nil
+		bot.webhookLoggerOwned = false
 	}
 	if bot.uploader != nil {
 		if err := bot.uploader.Close(); err != nil {
@@ -335,14 +422,14 @@ func (bot *Bot[T]) Close() error {
 		}
 	}
 	if bot.requestLogger != nil {
-		if err := bot.requestLogger.Close(); err != nil {
-			logCloseErr(err)
-		}
+		closeOwnedLogger(bot.requestLogger, bot.requestLoggerOwned)
+		bot.requestLogger = nil
+		bot.requestLoggerOwned = false
 	}
 	if bot.logger != nil {
-		if err := bot.logger.Close(); err != nil {
-			e = append(e, err)
-		}
+		closeOwnedLogger(bot.logger, bot.loggerOwned)
+		bot.logger = nil
+		bot.loggerOwned = false
 	}
 	return errors.Join(e...)
 }
@@ -432,25 +519,31 @@ func (bot *Bot[T]) RunWithContext(ctx context.Context) error {
 	defer bot.finishRun()
 	if !bot.useReqLogger && bot.requestLogger != nil {
 		bot.logger.Warnln("Opts#UseRequestLogger is false, but Bot#requestLogger present. Remove Bot#SetRequestLogger or set Opts#UseRequestLogger to true!")
-		err := bot.requestLogger.Close()
-		if err != nil {
-			bot.logger.Errorln(err)
+		if bot.requestLoggerOwned {
+			if err := bot.requestLogger.Close(); err != nil {
+				bot.logger.Errorln(err)
+			}
 		}
 		bot.requestLogger = nil
+		bot.requestLoggerOwned = false
 	}
 	if bot.webhookLogger != nil {
 		bot.logger.Warnln("Bot#webhookLogger present. You shouldn't set this, if ran in Long Polling mode!")
-		err := bot.webhookLogger.Close()
-		if err != nil {
-			bot.logger.Errorln(err)
+		if bot.webhookLoggerOwned {
+			if err := bot.webhookLogger.Close(); err != nil {
+				bot.logger.Errorln(err)
+			}
 		}
 		bot.webhookLogger = nil
+		bot.webhookLoggerOwned = false
 	}
 
 	bot.ExecRunners(ctx)
 
 	// Start update polling in a goroutine
+	pollDone := make(chan error, 1)
 	go func() {
+		var terminalErr error
 		defer func() {
 			if r := recover(); r != nil {
 				bot.logger.Errorln(fmt.Sprintf("panic in update polling: %v", r))
@@ -458,6 +551,7 @@ func (bot *Bot[T]) RunWithContext(ctx context.Context) error {
 				if !ok {
 					err = fmt.Errorf("%v", r)
 				}
+				terminalErr = fmt.Errorf("update polling: %w: %v", ErrHandlerPanic, err)
 				bot.safeEmitEvent(ctx, ErrorEvent{
 					Plugin:      "bot",
 					HandlerKind: HandlerPollingKind,
@@ -467,6 +561,7 @@ func (bot *Bot[T]) RunWithContext(ctx context.Context) error {
 				})
 			}
 			close(bot.updateQueue)
+			pollDone <- terminalErr
 		}()
 		backoffDelay := time.Duration(0)
 		retryCount := 0
@@ -531,7 +626,8 @@ func (bot *Bot[T]) RunWithContext(ctx context.Context) error {
 
 	bot.runnerOnceWG.Wait()
 	bot.runnerBgWG.Wait()
-	return nil
+	bot.middlewareWG.Wait()
+	return <-pollDone
 }
 
 // Run starts the bot using a background context.

bot_opts.go

@@ -54,8 +54,8 @@ type BotOpts struct {
 	// Telegram allows up to 30 req/s for most bots. Defaults to 30.
 	RateLimit int
 
-	// DropRateLimitOverflow drops incoming updates when rate limit is exceeded instead of queuing.
-	// Use this to prioritize responsiveness over reliability.
+	// DropRateLimitOverflow rejects outgoing Telegram API requests immediately when
+	// rate-limit capacity is unavailable instead of waiting for capacity.
 	DropRateLimitOverflow bool
 
 	// StrictPayloadType disables callback payload fallback decoding.
@@ -96,7 +96,7 @@ type BotOpts struct {
 //   - USE_TEST_SERVER: "true" to use Telegram test server
 //   - API_URL: custom API endpoint
 //   - RATE_LIMIT: max requests per second (default: 30)
-//   - DROP_RL_OVERFLOW: "true" to drop updates on rate limit overflow
+//   - DROP_RL_OVERFLOW: "true" to reject rate-limited API requests instead of waiting
 //   - STRICT_PAYLOAD_TYPE: "true" to reject callback payloads encoded in a different format
 //   - MAX_WORKERS: maximum number of concurrent update handlers (default: 32)
 //   - POLL_TIMEOUT: long-polling timeout in seconds for getUpdates (default: 30)
@@ -237,8 +237,8 @@ func (opts *BotOpts) SetRateLimit(limit int) *BotOpts {
 	return opts
 }
 
-// SetDropRateLimitOverflow drops incoming updates when rate limit is exceeded instead of queuing.
-// Use this to prioritize responsiveness over reliability. Default is false.
+// SetDropRateLimitOverflow configures outgoing Telegram API requests to fail
+// immediately when rate-limit capacity is unavailable. Default is false.
 func (opts *BotOpts) SetDropRateLimitOverflow(drop bool) *BotOpts {
 	opts.DropRateLimitOverflow = drop
 	return opts

bot_opts_loader.go

@@ -34,16 +34,26 @@ type botOptsFileJSONAPI struct {
 
 // BotOptsFileJSON is the JSON file representation of BotOpts.
 type BotOptsFileJSON struct {
-	Version           int                   `json:"version"`
-	Token             string                `json:"token"`
-	UpdateTypes       []tgapi.UpdateType    `json:"update_types"`
-	Debug             bool                  `json:"debug"`
-	ErrorTemplate     string                `json:"error_template"`
-	Prefixes          []string              `json:"prefixes"`
-	Logger            botOptsFileJSONLogger `json:"logger"`
-	API               botOptsFileJSONAPI    `json:"api"`
-	StrictPayloadType bool                  `json:"strict_payload_type"`
-	MaxWorkers        int                   `json:"max_workers"`
+	// Version identifies the JSON configuration format version.
+	Version int `json:"version"`
+	// Token is the Telegram bot token.
+	Token string `json:"token"`
+	// UpdateTypes limits the update kinds requested from Telegram.
+	UpdateTypes []tgapi.UpdateType `json:"update_types"`
+	// Debug enables debug logging.
+	Debug bool `json:"debug"`
+	// ErrorTemplate formats user-facing handler errors.
+	ErrorTemplate string `json:"error_template"`
+	// Prefixes contains accepted command prefixes.
+	Prefixes []string `json:"prefixes"`
+	// Logger contains file logging options.
+	Logger botOptsFileJSONLogger `json:"logger"`
+	// API contains Telegram client and rate-limit options.
+	API botOptsFileJSONAPI `json:"api"`
+	// StrictPayloadType requires callback payloads to use the configured encoding.
+	StrictPayloadType bool `json:"strict_payload_type"`
+	// MaxWorkers limits concurrent update handlers.
+	MaxWorkers int `json:"max_workers"`
 }
 
 // BotOptsFileJSONCodec encodes and decodes BotOpts using BotOptsFileJSON.
@@ -87,6 +97,9 @@ func (codec BotOptsFileJSONCodec) FromBytes(data []byte) (*BotOpts, error) {
 
 // ToBytes encodes BotOpts into JSON file bytes.
 func (codec BotOptsFileJSONCodec) ToBytes(opts *BotOpts) ([]byte, error) {
+	if opts == nil {
+		return nil, ErrOptsIsNil
+	}
 	fileOpts := &BotOptsFileJSON{
 		Version:       ConfigVersion,
 		Token:         opts.Token,
@@ -127,7 +140,17 @@ func (codec BotOptsFileJSONCodec) Save(filename string, opts *BotOpts) error {
 	return SaveBotOptsFile(codec, filename, opts)
 }
 
-var envParameterRegex = regexp.MustCompile(`\{\{\s*(\w+)\s*\}\}`)
+// EscapeEnv escapes an environment value for use inside a JSON string.
+func (codec BotOptsFileJSONCodec) EscapeEnv(s string) string {
+	data, _ := json.Marshal(s)
+	return string(data[1 : len(data)-1])
+}
+
+var envParameterRegex = regexp.MustCompile(`\{\{\s*(\w+)\s*}}`)
+
+type botOptsFileEnvEscaper interface {
+	EscapeEnv(string) string
+}
 
 // BotOptsFileCodec decodes and encodes BotOpts file formats.
 type BotOptsFileCodec interface {
@@ -139,6 +162,9 @@ type BotOptsFileCodec interface {
 
 // LoadBotOptsFile reads a config file, expands env placeholders, and decodes BotOpts.
 func LoadBotOptsFile(codec BotOptsFileCodec, filename string) (*BotOpts, error) {
+	if isNilValue(codec) {
+		return nil, ErrCodecIsNil
+	}
 	f, err := os.Open(filename)
 	if err != nil {
 		return nil, err
@@ -148,12 +174,18 @@ func LoadBotOptsFile(codec BotOptsFileCodec, filename string) (*BotOpts, error)
 	if err != nil {
 		return nil, err
 	}
-	data = expandEnvPlaceholdersInFile(data)
+	data = expandEnvPlaceholdersInFile(codec, data)
 	return codec.FromBytes(data)
 }
 
 // SaveBotOptsFile encodes BotOpts with codec and writes the result to filename.
 func SaveBotOptsFile(codec BotOptsFileCodec, filename string, opts *BotOpts) error {
+	if isNilValue(codec) {
+		return ErrCodecIsNil
+	}
+	if opts == nil {
+		return ErrOptsIsNil
+	}
 	data, err := codec.ToBytes(opts)
 	if err != nil {
 		return err
@@ -165,7 +197,7 @@ func SaveBotOptsFile(codec BotOptsFileCodec, filename string, opts *BotOpts) err
 	return nil
 }
 
-func expandEnvPlaceholdersInFile(data []byte) []byte {
+func expandEnvPlaceholdersInFile(codec BotOptsFileCodec, data []byte) []byte {
 	return envParameterRegex.ReplaceAllFunc(data, func(match []byte) []byte {
 		group := envParameterRegex.FindSubmatch(match)
 		if len(group) != 2 {
@@ -173,6 +205,9 @@ func expandEnvPlaceholdersInFile(data []byte) []byte {
 		}
 		key := group[1]
 		value := os.Getenv(string(key))
+		if escaper, ok := codec.(botOptsFileEnvEscaper); ok {
+			value = escaper.EscapeEnv(value)
+		}
 		return []byte(value)
 	})
 }

bot_opts_loader_test.go

@@ -46,6 +46,21 @@ func TestBotOptsFileJSONCodecRoundTrip(t *testing.T) {
 	}
 }
 
+func TestBotOptsFileRejectsNilInputs(t *testing.T) {
+	if _, err := (BotOptsFileJSONCodec{}).ToBytes(nil); !errors.Is(err, ErrOptsIsNil) {
+		t.Fatalf("ToBytes error = %v, want ErrOptsIsNil", err)
+	}
+	if _, err := LoadBotOptsFile(nil, "unused"); !errors.Is(err, ErrCodecIsNil) {
+		t.Fatalf("LoadBotOptsFile error = %v, want ErrCodecIsNil", err)
+	}
+	if err := SaveBotOptsFile(nil, "unused", &BotOpts{}); !errors.Is(err, ErrCodecIsNil) {
+		t.Fatalf("SaveBotOptsFile error = %v, want ErrCodecIsNil", err)
+	}
+	if err := SaveBotOptsFile(BotOptsFileJSONCodec{}, "unused", nil); !errors.Is(err, ErrOptsIsNil) {
+		t.Fatalf("SaveBotOptsFile nil opts error = %v, want ErrOptsIsNil", err)
+	}
+}
+
 func TestLoadBotOptsFileExpandsEnvPlaceholders(t *testing.T) {
 	t.Setenv("TG_TOKEN", "TOKEN_FROM_ENV")
 	t.Setenv("BOT_API_URL", "https://api.example.invalid")
@@ -82,6 +97,25 @@ func TestLoadBotOptsFileExpandsEnvPlaceholders(t *testing.T) {
 	}
 }
 
+func TestLoadBotOptsFileEscapesEnvironmentValuesForJSON(t *testing.T) {
+	want := "quote: \"; slash: \\; newline:\n; tab:\t; control:\x01"
+	t.Setenv("TG_TOKEN", want)
+
+	dir := t.TempDir()
+	filename := filepath.Join(dir, "config.json")
+	if err := os.WriteFile(filename, []byte(`{"token":"{{TG_TOKEN}}"}`), 0o644); err != nil {
+		t.Fatalf("WriteFile returned error: %v", err)
+	}
+
+	got, err := LoadBotOptsFile(BotOptsFileJSONCodec{}, filename)
+	if err != nil {
+		t.Fatalf("LoadBotOptsFile returned error: %v", err)
+	}
+	if got.Token != want {
+		t.Fatalf("unexpected token: got %q want %q", got.Token, want)
+	}
+}
+
 func TestLoadBotOptsFileReturnsDecodeError(t *testing.T) {
 	dir := t.TempDir()
 	filename := filepath.Join(dir, "config.json")

bot_register.go

@@ -19,6 +19,12 @@ func (bot *Bot[T]) AddPlugins(plugin ...*Plugin[T]) *Bot[T] {
 		return bot
 	}
 	level := bot.GetLoggerLevel()
+	sceneOwners := make(map[string]string)
+	for _, registered := range bot.plugins {
+		for name := range registered.scenes {
+			sceneOwners[name] = registered.name
+		}
+	}
 	for _, p := range plugin {
 		if p == nil {
 			if bot.logger != nil {
@@ -27,6 +33,16 @@ func (bot *Bot[T]) AddPlugins(plugin ...*Plugin[T]) *Bot[T] {
 			continue
 		}
 		cloned := clonePlugin(p)
+		for name := range cloned.scenes {
+			if owner, duplicate := sceneOwners[name]; duplicate {
+				if bot.logger != nil {
+					bot.logger.Warnf("scene %q from plugin %q duplicates plugin %q; skipping", name, cloned.name, owner)
+				}
+				delete(cloned.scenes, name)
+				continue
+			}
+			sceneOwners[name] = cloned.name
+		}
 		if cloned.logger == nil {
 			cloned.logger = utils.CreateLogger(cloned.name, level, bot.logFormat, bot.logFormatter)
 			cloned.loggerOwned = true
@@ -134,6 +150,15 @@ func (bot *Bot[T]) AddRunner(runner Runner[T]) *Bot[T] {
 //	    return data.QueryLogger()
 //	})
 func (bot *Bot[T]) AddAppDataLoggerWriter(writer AppDataLogger[T]) *Bot[T] {
+	if !bot.configMutable("AddAppDataLoggerWriter") {
+		return bot
+	}
+	if writer == nil {
+		if bot.logger != nil {
+			bot.logger.Warnln("AddAppDataLoggerWriter called with nil writer; nothing changed")
+		}
+		return bot
+	}
 	if !bot.hasAppData {
 		bot.logger.Warnln("app data is not set; skipping app-data logger writer")
 		return bot
@@ -143,6 +168,12 @@ func (bot *Bot[T]) AddAppDataLoggerWriter(writer AppDataLogger[T]) *Bot[T] {
 		return bot
 	}
 	w := writer(bot.appData)
+	if isNilValue(w) {
+		if bot.logger != nil {
+			bot.logger.Warnln("app-data logger writer returned nil; nothing changed")
+		}
+		return bot
+	}
 	bot.logger.AddWriters(w)
 	if bot.requestLogger != nil {
 		bot.requestLogger.AddWriters(w)

bot_test.go

@@ -22,6 +22,14 @@ func (f pollingRoundTripFunc) RoundTrip(req *http.Request) (*http.Response, erro
 	return f(req)
 }
 
+type closeCountingWriter struct{ closes int }
+
+func (w *closeCountingWriter) Close() error                { w.closes++; return nil }
+func (w *closeCountingWriter) Write(p []byte) (int, error) { return len(p), nil }
+func (w *closeCountingWriter) Print(sneklog.LogLevel, string, []*sneklog.MethodTraceback, ...any) error {
+	return nil
+}
+
 type pollingRetryObserver struct {
 	recordingObserver
 	cancel      context.CancelFunc
@@ -48,6 +56,17 @@ func (testObserver) OnRunnerFinished(context.Context, RunnerFinishedEvent)   {}
 func (testObserver) OnPollingRetry(context.Context, PollingRetryEvent)       {}
 func (testObserver) OnError(context.Context, ErrorEvent)                     {}
 
+type blockingObserver struct {
+	testObserver
+	started chan struct{}
+	release chan struct{}
+}
+
+func (o *blockingObserver) OnError(context.Context, ErrorEvent) {
+	close(o.started)
+	<-o.release
+}
+
 func TestGetUpdateTypesReturnsCopy(t *testing.T) {
 	bot := &Bot[NoData]{updateTypes: []tgapi.UpdateType{tgapi.UpdateTypeMessage}}
 
@@ -308,6 +327,97 @@ func TestAddDatabaseLoggerWriterSkipsWhenAppDataIsNil(t *testing.T) {
 	}
 }
 
+func TestLoggerConfigurationRejectsNilAndLateMutation(t *testing.T) {
+	original := sneklog.NewLogger()
+	replacement := sneklog.NewLogger()
+	bot := &Bot[NoData]{logger: original, token: "secret"}
+
+	bot.SetLogger(nil)
+	if bot.logger != original {
+		t.Fatal("SetLogger(nil) replaced the logger")
+	}
+	bot.SetAppData(NoData{})
+	bot.AddAppDataLoggerWriter(nil)
+
+	if err := bot.beginRun(); err != nil {
+		t.Fatalf("beginRun returned error: %v", err)
+	}
+	defer bot.finishRun()
+	bot.SetLogger(replacement)
+	bot.SetRequestLogger(replacement)
+	bot.SetWebhookLogger(replacement)
+	if bot.logger != original || bot.requestLogger != nil || bot.webhookLogger != nil {
+		t.Fatal("logger configuration changed after runtime freeze")
+	}
+}
+
+func TestCloseRespectsLoggerOwnershipAndAliases(t *testing.T) {
+	ownedWriter := new(closeCountingWriter)
+	owned := sneklog.NewLogger().AddWriter(ownedWriter)
+	bot := &Bot[NoData]{
+		logger: owned, loggerOwned: true,
+		requestLogger: owned, requestLoggerOwned: false,
+	}
+	if err := bot.Close(); err != nil {
+		t.Fatalf("Close returned error: %v", err)
+	}
+	if ownedWriter.closes != 1 {
+		t.Fatalf("owned aliased logger closed %d times, want 1", ownedWriter.closes)
+	}
+
+	callerWriter := new(closeCountingWriter)
+	callerLogger := sneklog.NewLogger().AddWriter(callerWriter)
+	bot = &Bot[NoData]{logger: callerLogger, requestLogger: callerLogger, webhookLogger: callerLogger}
+	if err := bot.Close(); err != nil {
+		t.Fatalf("Close with caller logger returned error: %v", err)
+	}
+	if callerWriter.closes != 0 {
+		t.Fatalf("caller-owned logger closed %d times", callerWriter.closes)
+	}
+	_ = callerLogger.Close()
+}
+
+func TestRunWithContextReturnsPollingPanic(t *testing.T) {
+	bot := &Bot[NoData]{
+		logger: sneklog.NewLogger(), prefixes: []string{"/"},
+		plugins: []Plugin[NoData]{{name: "demo"}}, updateQueue: make(chan *tgapi.Update, 1), maxWorkers: 1,
+	}
+	defer func() { _ = bot.logger.Close() }()
+
+	err := bot.RunWithContext(context.Background())
+	if !errors.Is(err, ErrHandlerPanic) {
+		t.Fatalf("RunWithContext error = %v, want ErrHandlerPanic", err)
+	}
+}
+
+func TestNewBotWithAPIUsesInjectedClient(t *testing.T) {
+	client := &http.Client{Transport: pollingRoundTripFunc(func(*http.Request) (*http.Response, error) {
+		return &http.Response{
+			StatusCode: http.StatusOK,
+			Header:     http.Header{"Content-Type": []string{"application/json"}},
+			Body:       io.NopCloser(strings.NewReader(`{"ok":true,"result":{"id":7,"is_bot":true,"first_name":"Test","username":"test_bot"}}`)),
+		}, nil
+	})}
+	api := tgapi.NewAPI(tgapi.NewAPIOpts("token").SetAPIURL("http://example.invalid").SetHTTPClient(client))
+	bot, err := NewBotWithAPI[NoData](&BotOpts{Token: "token"}, api)
+	if err != nil {
+		t.Fatalf("NewBotWithAPI returned error: %v", err)
+	}
+	if bot.GetAPI() != api || bot.GetUploader() == nil {
+		t.Fatal("injected API was not used consistently")
+	}
+	if err := bot.Close(); err != nil {
+		t.Fatalf("Close returned error: %v", err)
+	}
+}
+
+func TestAddAppDataLoggerWriterRejectsNilResult(t *testing.T) {
+	bot := &Bot[NoData]{logger: sneklog.NewLogger(), hasAppData: true}
+	defer func() { _ = bot.logger.Close() }()
+
+	bot.AddAppDataLoggerWriter(func(NoData) sneklog.LoggerWriter { return nil })
+}
+
 func TestShouldWarnOnValueAppData(t *testing.T) {
 	type testDB struct{}
 	type dbIface interface{ Ping() error }
@@ -378,6 +488,50 @@ func TestSetObserverNilClearsObserver(t *testing.T) {
 	}
 }
 
+func TestRuntimeObserverDispatchIsAsyncAndDrained(t *testing.T) {
+	observer := &blockingObserver{
+		started: make(chan struct{}),
+		release: make(chan struct{}),
+	}
+	bot := &Bot[NoData]{logger: sneklog.NewLogger(), observer: observer}
+	if err := bot.beginRun(); err != nil {
+		t.Fatalf("beginRun returned error: %v", err)
+	}
+
+	emitted := make(chan struct{})
+	go func() {
+		bot.safeEmitEvent(context.Background(), ErrorEvent{Err: errors.New("boom")})
+		close(emitted)
+	}()
+	select {
+	case <-emitted:
+	case <-time.After(100 * time.Millisecond):
+		t.Fatal("safeEmitEvent blocked on observer callback")
+	}
+	select {
+	case <-observer.started:
+	case <-time.After(time.Second):
+		t.Fatal("observer callback did not start")
+	}
+
+	finished := make(chan struct{})
+	go func() {
+		bot.finishRun()
+		close(finished)
+	}()
+	select {
+	case <-finished:
+		t.Fatal("finishRun returned before the queued callback completed")
+	case <-time.After(10 * time.Millisecond):
+	}
+	close(observer.release)
+	select {
+	case <-finished:
+	case <-time.After(time.Second):
+		t.Fatal("finishRun did not drain observer callbacks")
+	}
+}
+
 func TestRunWithContextRejectsSecondRun(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	cancel()

bot_utils.go

@@ -18,6 +18,8 @@ import (
 	"github.com/alitto/pond/v2"
 )
 
+const observerShutdownTimeout = 5 * time.Second
+
 func (bot *Bot[T]) addTokenReplacer(loggers ...*sneklog.Logger) {
 	if bot.token == "" {
 		return
@@ -30,6 +32,19 @@ func (bot *Bot[T]) addTokenReplacer(loggers ...*sneklog.Logger) {
 	}
 }
 
+func (bot *Bot[T]) closeReplacedLogger(old *sneklog.Logger, owned bool, replacements ...*sneklog.Logger) {
+	if old == nil || !owned || len(replacements) == 0 || replacements[0] == old {
+		return
+	}
+	if slices.Contains(replacements[1:], old) {
+		bot.detachedOwnedLoggers = appendUniqueLogger(bot.detachedOwnedLoggers, old)
+		return
+	}
+	if err := old.Close(); err != nil && bot.logger != nil && bot.logger != old {
+		bot.logger.Errorln(err)
+	}
+}
+
 func appendUniqueLogger(loggers []*sneklog.Logger, logger *sneklog.Logger) []*sneklog.Logger {
 	if logger == nil {
 		return loggers
@@ -80,26 +95,32 @@ func (bot *Bot[T]) initLoggers(opts *BotOpts) {
 	format, formatter := opts.LogFormat, opts.LogFormatter
 	if bot.logger == nil {
 		bot.logger = utils.CreateLogger("BOT", level, format, formatter)
+		bot.loggerOwned = true
 		if opts.WriteToFile {
 			path := fmt.Sprintf("%s/main.log", strings.TrimRight(opts.LoggerBasePath, "/"))
 			logger, err := utils.CreateFileLogger("BOT", level, path, format, formatter)
 			if err != nil {
 				bot.logger.Errorln(err)
 			} else {
+				_ = bot.logger.Close()
 				bot.logger = logger
+				bot.loggerOwned = true
 			}
 		}
 	}
 
 	if opts.UseRequestLogger && bot.requestLogger == nil {
 		bot.requestLogger = utils.CreateLogger("REQUESTS", level, format, formatter)
+		bot.requestLoggerOwned = true
 		if opts.WriteToFile {
 			path := fmt.Sprintf("%s/requests.log", strings.TrimRight(opts.LoggerBasePath, "/"))
 			logger, err := utils.CreateFileLogger("REQUESTS", level, path, format, formatter)
 			if err != nil {
 				bot.logger.Errorln(err)
 			} else {
+				_ = bot.requestLogger.Close()
 				bot.requestLogger = logger
+				bot.requestLoggerOwned = true
 			}
 		}
 	}
@@ -110,21 +131,45 @@ func (bot *Bot[T]) initLoggers(opts *BotOpts) {
 
 func (bot *Bot[T]) beginRun() error {
 	bot.runStateMu.Lock()
-	defer bot.runStateMu.Unlock()
 	if bot.running || bot.ran {
+		bot.runStateMu.Unlock()
 		return ErrBotAlreadyRun
 	}
 	bot.running = true
 	bot.ran = true
+	bot.runStateMu.Unlock()
+	if bot.observer != nil {
+		bot.observerAsync = newObserverDispatcher(bot.observer, bot.logger)
+	}
 	return nil
 }
 
 func (bot *Bot[T]) finishRun() {
+	ctx, cancel := context.WithTimeout(context.Background(), observerShutdownTimeout)
+	if err := bot.stopObserverDispatcher(ctx); err != nil && bot.logger != nil {
+		bot.logger.Errorln(err)
+	}
+	cancel()
 	bot.runStateMu.Lock()
 	bot.running = false
 	bot.runStateMu.Unlock()
 }
 
+func (bot *Bot[T]) stopObserverDispatcher(ctx context.Context) error {
+	if bot.observerAsync == nil {
+		return nil
+	}
+	return bot.observerAsync.close(ctx)
+}
+
+func (bot *Bot[T]) startAsyncTask(task func()) {
+	bot.middlewareWG.Add(1)
+	go func() {
+		defer bot.middlewareWG.Done()
+		task()
+	}()
+}
+
 func nextPollRetryDelay(prev time.Duration) time.Duration {
 	if prev <= 0 {
 		return time.Second

bot_webhook.go

@@ -18,17 +18,27 @@ import (
 
 // BotWebhookOpts configures Telegram webhook registration and the local HTTP server.
 type BotWebhookOpts struct {
-	Path          string
-	LocalPort     int
+	// Path is the local HTTP route that receives Telegram updates.
+	Path string
+	// LocalPort is the TCP port used by the webhook server.
+	LocalPort int
+	// UseStatusPath enables the authenticated /status endpoint.
 	UseStatusPath bool
 
-	URL                string
-	Certificate        []byte
-	IPAddress          string
-	MaxConnections     int8
-	AllowedUpdates     []tgapi.UpdateType
+	// URL is the public base URL Telegram uses for delivery.
+	URL string
+	// Certificate contains a self-signed public certificate to upload.
+	Certificate []byte
+	// IPAddress fixes the destination IP used by Telegram.
+	IPAddress string
+	// MaxConnections limits simultaneous Telegram webhook connections to 1–100.
+	MaxConnections int8
+	// AllowedUpdates limits the update kinds delivered to the webhook.
+	AllowedUpdates []tgapi.UpdateType
+	// DropPendingUpdates requests deletion of queued updates during registration.
 	DropPendingUpdates bool
-	SecretToken        string
+	// SecretToken authenticates Telegram requests and the optional status endpoint.
+	SecretToken string
 }
 
 // NewBotWebhookOpts returns webhook options with the default path, local port, and max connections.
@@ -152,6 +162,9 @@ func (bot *Bot[T]) RunWebhookWithContext(ctx context.Context, opts *BotWebhookOp
 	if opts.MaxConnections > 100 || opts.MaxConnections <= 0 {
 		return ErrBotWebhookOptsMaxConnectionsRange
 	}
+	if err := validateWebhookSecretToken(opts.SecretToken); err != nil {
+		return err
+	}
 	if err := validateWebhookPath(opts.Path, opts.UseStatusPath); err != nil {
 		return err
 	}
@@ -165,7 +178,7 @@ func (bot *Bot[T]) RunWebhookWithContext(ctx context.Context, opts *BotWebhookOp
 
 	return bot.runWebhookRuntime(ctx, func(runCtx context.Context) error {
 		if autoSecret != "" {
-			bot.webhookLogger.Warnln("Using webhook without secret is very dangerous. Using random 32 bytes token:", autoSecret)
+			bot.webhookLogger.Warnln("No webhook secret was configured; generated a random secret token")
 		}
 		i, err := bot.api.GetWebhookInfoWithContext(runCtx)
 		if err != nil {
@@ -244,10 +257,13 @@ func (bot *Bot[T]) CloseWebhook() error {
 		}
 	}
 	if bot.webhookLogger != nil {
-		if err := bot.webhookLogger.Close(); err != nil {
-			e = append(e, err)
+		if bot.webhookLoggerOwned {
+			if err := bot.webhookLogger.Close(); err != nil {
+				e = append(e, err)
+			}
 		}
 		bot.webhookLogger = nil
+		bot.webhookLoggerOwned = false
 	}
 	return errors.Join(e...)
 }
@@ -270,6 +286,7 @@ func (bot *Bot[T]) runWebhookRuntime(ctx context.Context, run func(context.Conte
 
 	if bot.webhookLogger == nil {
 		bot.webhookLogger = utils.CreateLogger("WEBHOOK", bot.GetLoggerLevel(), bot.logFormat, bot.logFormatter)
+		bot.webhookLoggerOwned = true
 	}
 	bot.addTokenReplacer(bot.webhookLogger)
 	bot.ExecRunners(runCtx)
@@ -284,6 +301,7 @@ func (bot *Bot[T]) runWebhookRuntime(ctx context.Context, run func(context.Conte
 	cancel()
 	close(bot.updateQueue)
 	<-workersDone
+	bot.middlewareWG.Wait()
 	bot.runnerOnceWG.Wait()
 	bot.runnerBgWG.Wait()
 
@@ -381,8 +399,11 @@ func (bot *Bot[T]) newWebhookMux(ctx context.Context, opts *BotWebhookOpts) *htt
 }
 func (bot *Bot[T]) baseRunWebhook(ctx context.Context, opts *BotWebhookOpts, runFunc func(*http.Server, chan error)) error {
 	srv := &http.Server{
-		Addr:    fmt.Sprintf(":%d", opts.LocalPort),
-		Handler: bot.newWebhookMux(ctx, opts),
+		Addr:              fmt.Sprintf(":%d", opts.LocalPort),
+		Handler:           bot.newWebhookMux(ctx, opts),
+		ReadHeaderTimeout: 5 * time.Second,
+		ReadTimeout:       10 * time.Second,
+		IdleTimeout:       60 * time.Second,
 	}
 	errCh := make(chan error, 1)
 
@@ -442,6 +463,21 @@ func validateWebhookPath(path string, useStatusPath bool) error {
 	return nil
 }
 
+func validateWebhookSecretToken(token string) error {
+	if len(token) < 1 || len(token) > 256 {
+		return ErrBotWebhookOptsSecretTokenInvalid
+	}
+	for _, r := range token {
+		if (r < 'A' || r > 'Z') &&
+			(r < 'a' || r > 'z') &&
+			(r < '0' || r > '9') &&
+			r != '_' && r != '-' {
+			return ErrBotWebhookOptsSecretTokenInvalid
+		}
+	}
+	return nil
+}
+
 func validateWebhookTLSFiles(tlsFiles []string) error {
 	switch len(tlsFiles) {
 	case 0, 2:

bot_webhook_test.go

@@ -255,6 +255,33 @@ func TestValidateWebhookTLSFiles(t *testing.T) {
 	}
 }
 
+func TestValidateWebhookSecretToken(t *testing.T) {
+	tests := []struct {
+		name    string
+		token   string
+		wantErr bool
+	}{
+		{name: "minimum", token: "a"},
+		{name: "allowed alphabet", token: "AZaz09_-"},
+		{name: "maximum", token: strings.Repeat("a", 256)},
+		{name: "empty", token: "", wantErr: true},
+		{name: "too long", token: strings.Repeat("a", 257), wantErr: true},
+		{name: "padding", token: "abc=", wantErr: true},
+		{name: "non ASCII", token: "секрет", wantErr: true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := validateWebhookSecretToken(tt.token)
+			if tt.wantErr && !errors.Is(err, ErrBotWebhookOptsSecretTokenInvalid) {
+				t.Fatalf("expected ErrBotWebhookOptsSecretTokenInvalid, got %v", err)
+			}
+			if !tt.wantErr && err != nil {
+				t.Fatalf("unexpected error: %v", err)
+			}
+		})
+	}
+}
+
 func TestUpdateHandlerRejectsOversizedBody(t *testing.T) {
 	bot := &Bot[NoData]{
 		updateQueue:   make(chan *tgapi.Update, 1),

cmd_generator.go

@@ -1,16 +1,17 @@
 package laniakea
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"regexp"
 	"sort"
 	"strings"
+	"unicode/utf8"
 
 	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
 )
 
-// cmdRegexp matches command names allowed for Telegram command registration.
 var cmdRegexp = regexp.MustCompile("^[_a-z0-9]{1,32}$")
 
 // ErrTooManyCommands is returned when the total number of registered commands
@@ -21,6 +22,39 @@ var cmdRegexp = regexp.MustCompile("^[_a-z0-9]{1,32}$")
 // bot initialization.
 var ErrTooManyCommands = errors.New("too many commands. max 100")
 
+var (
+	// ErrInvalidBotCommand reports a command name that Telegram would reject.
+	ErrInvalidBotCommand = errors.New("invalid bot command")
+	// ErrInvalidBotCommandDescription reports an empty or overlong generated description.
+	ErrInvalidBotCommandDescription = errors.New("invalid bot command description")
+	// ErrDuplicateBotCommand reports the same command generated by multiple plugins.
+	ErrDuplicateBotCommand = errors.New("duplicate bot command")
+	// ErrPartialCommandScopeUpdate reports that an earlier command scope was
+	// updated before a later scope failed.
+	ErrPartialCommandScopeUpdate = errors.New("partial command scope update")
+)
+
+// CommandScopeUpdateError describes a failed multi-scope command update.
+// UpdatedScopes lists scopes successfully changed before FailedScope failed.
+type CommandScopeUpdateError struct {
+	// UpdatedScopes contains scopes changed before the failure.
+	UpdatedScopes []tgapi.BotCommandScopeType
+	// FailedScope identifies the scope whose update failed.
+	FailedScope tgapi.BotCommandScopeType
+	// Err is the Telegram API error for FailedScope.
+	Err error
+}
+
+// Error returns a human-readable partial-update description.
+func (e *CommandScopeUpdateError) Error() string {
+	return fmt.Sprintf("%v: updated %v; failed scope %q: %v", ErrPartialCommandScopeUpdate, e.UpdatedScopes, e.FailedScope, e.Err)
+}
+
+// Unwrap exposes both the partial-update sentinel and the underlying API error.
+func (e *CommandScopeUpdateError) Unwrap() []error {
+	return []error{ErrPartialCommandScopeUpdate, e.Err}
+}
+
 func generateBotCommand[T any](cmd *Command[T]) tgapi.BotCommand {
 	desc := ""
 	if len(cmd.description) > 0 {
@@ -36,17 +70,20 @@ func generateBotCommand[T any](cmd *Command[T]) tgapi.BotCommand {
 		}
 	}
 
-	usage := fmt.Sprintf("Usage: /%s %s", cmd.command, strings.Join(descArgs, " "))
+	usage := fmt.Sprintf("Usage: /%s", cmd.command)
+	if len(descArgs) > 0 {
+		usage += " " + strings.Join(descArgs, " ")
+	}
 	if desc != "" {
 		desc = fmt.Sprintf("%s. %s", desc, usage)
-		return tgapi.BotCommand{Command: cmd.command, Description: desc}
+		return tgapi.BotCommand{Command: cmd.command, Description: desc, IsEphemeral: cmd.isEphemeral}
 	}
-	return tgapi.BotCommand{Command: cmd.command, Description: usage}
+	return tgapi.BotCommand{Command: cmd.command, Description: usage, IsEphemeral: cmd.isEphemeral}
 }
 
 func checkCmdRegex(cmd string) bool { return cmdRegexp.MatchString(cmd) }
 
-func gatherCommandsForPlugin[T any](pl Plugin[T]) []tgapi.BotCommand {
+func gatherCommandsForPlugin[T any](pl Plugin[T]) ([]tgapi.BotCommand, error) {
 	commands := make([]tgapi.BotCommand, 0)
 	names := make([]string, 0, len(pl.commands))
 	for name := range pl.commands {
@@ -60,34 +97,55 @@ func gatherCommandsForPlugin[T any](pl Plugin[T]) []tgapi.BotCommand {
 			continue
 		}
 		if !checkCmdRegex(cmd.command) {
-			continue
+			return nil, fmt.Errorf("%w %q in plugin %q", ErrInvalidBotCommand, cmd.command, pl.name)
 		}
-		commands = append(commands, generateBotCommand(cmd))
+		generated := generateBotCommand(cmd)
+		descriptionLength := utf8.RuneCountInString(generated.Description)
+		if descriptionLength < 1 || descriptionLength > 256 {
+			return nil, fmt.Errorf(
+				"%w for %q in plugin %q: got %d characters, want 1..256",
+				ErrInvalidBotCommandDescription,
+				cmd.command,
+				pl.name,
+				descriptionLength,
+			)
+		}
+		commands = append(commands, generated)
 	}
-	return commands
+	return commands, nil
 }
 
-func gatherCommands[T any](bot *Bot[T]) []tgapi.BotCommand {
+func gatherCommands[T any](bot *Bot[T]) ([]tgapi.BotCommand, error) {
 	commands := make([]tgapi.BotCommand, 0)
+	owners := make(map[string]string)
 	for _, pl := range bot.plugins {
 		if pl.skipAutoCmd {
 			continue
 		}
-		commands = append(commands, gatherCommandsForPlugin(pl)...)
+		pluginCommands, err := gatherCommandsForPlugin(pl)
+		if err != nil {
+			return nil, err
+		}
+		for _, command := range pluginCommands {
+			if owner, exists := owners[command.Command]; exists {
+				return nil, fmt.Errorf(
+					"%w %q in plugins %q and %q",
+					ErrDuplicateBotCommand,
+					command.Command,
+					owner,
+					pl.name,
+				)
+			}
+			owners[command.Command] = pl.name
+			commands = append(commands, command)
+		}
 		bot.logger.Debugln(fmt.Sprintf("Registered %d commands from plugin %s", len(pl.commands), pl.name))
 	}
-	return commands
+	return commands, nil
 }
 
-// AutoGenerateCommands registers all plugin-defined commands with Telegram's Bot API
-// across three scopes:
-//   - Private chats (users)
-//   - Group chats
-//   - Group administrators
-//
-// It first deletes existing commands to ensure a clean state, then sets the new
-// set of commands for all scopes. This ensures consistency even if commands were
-// previously modified manually via @BotFather.
+// AutoGenerateCommands replaces plugin-defined commands in the private-chat,
+// group-chat, and all-chat-administrators scopes.
 //
 // Returns ErrTooManyCommands if the total number of commands exceeds 100.
 // Returns any API error from Telegram (e.g., network issues, invalid scope).
@@ -102,40 +160,45 @@ func gatherCommands[T any](bot *Bot[T]) []tgapi.BotCommand {
 //	    log.Fatal(err)
 //	}
 func (bot *Bot[T]) AutoGenerateCommands() error {
-	commands := gatherCommands(bot)
+	return bot.AutoGenerateCommandsWithContext(context.Background())
+}
+
+// AutoGenerateCommandsWithContext is the context-aware variant of AutoGenerateCommands.
+func (bot *Bot[T]) AutoGenerateCommandsWithContext(ctx context.Context) error {
+	commands, err := gatherCommands(bot)
+	if err != nil {
+		return err
+	}
 	if len(commands) > 100 {
 		return ErrTooManyCommands
 	}
 
-	// Clear existing commands to avoid duplication or stale entries
-	_, err := bot.api.DeleteMyCommands(tgapi.DeleteMyCommands{})
-	if err != nil {
-		return fmt.Errorf("failed to delete existing commands: %w", err)
-	}
-
 	// Register commands for each scope
-	scopes := []*tgapi.BotCommandScope{
+	scopes := []tgapi.BotCommandScope{
 		{Type: tgapi.BotCommandScopePrivateType},
 		{Type: tgapi.BotCommandScopeGroupType},
 		{Type: tgapi.BotCommandScopeAllChatAdministratorsType},
 	}
 
-	for _, scope := range scopes {
-		_, err = bot.api.SetMyCommands(tgapi.SetMyCommands{
-			Commands: commands,
-			Scope:    scope,
-		})
-		if err != nil {
-			return fmt.Errorf("failed to set commands for scope %q: %w", scope.Type, err)
+	updatedScopes := make([]tgapi.BotCommandScopeType, 0, len(scopes))
+	for i := range scopes {
+		if err := bot.setCommandsForScope(ctx, &scopes[i], commands); err != nil {
+			if len(updatedScopes) > 0 {
+				return &CommandScopeUpdateError{
+					UpdatedScopes: updatedScopes,
+					FailedScope:   scopes[i].Type,
+					Err:           err,
+				}
+			}
+			return err
 		}
+		updatedScopes = append(updatedScopes, scopes[i].Type)
 	}
-
 	return nil
 }
 
 // AutoGenerateCommandsForScope registers all plugin-defined commands with Telegram's Bot API
-// for the specified command scope. It first deletes any existing commands in that scope
-// to ensure a clean state, then sets the new set of commands.
+// for the specified command scope. A nil scope selects Telegram's default scope.
 //
 // The scope parameter defines where the commands should be available (e.g., private chats,
 // group chats, chat administrators). See tgapi.BotCommandScope and its predefined types.
@@ -150,22 +213,33 @@ func (bot *Bot[T]) AutoGenerateCommands() error {
 //	    log.Fatal(err)
 //	}
 func (bot *Bot[T]) AutoGenerateCommandsForScope(scope *tgapi.BotCommandScope) error {
-	commands := gatherCommands(bot)
+	return bot.AutoGenerateCommandsForScopeWithContext(context.Background(), scope)
+}
+
+// AutoGenerateCommandsForScopeWithContext is the context-aware variant of
+// AutoGenerateCommandsForScope.
+func (bot *Bot[T]) AutoGenerateCommandsForScopeWithContext(ctx context.Context, scope *tgapi.BotCommandScope) error {
+	commands, err := gatherCommands(bot)
+	if err != nil {
+		return err
+	}
 	if len(commands) > 100 {
 		return ErrTooManyCommands
 	}
+	return bot.setCommandsForScope(ctx, scope, commands)
+}
 
-	_, err := bot.api.DeleteMyCommands(tgapi.DeleteMyCommands{Scope: scope})
-	if err != nil {
-		return fmt.Errorf("failed to delete existing commands: %w", err)
+func (bot *Bot[T]) setCommandsForScope(ctx context.Context, scope *tgapi.BotCommandScope, commands []tgapi.BotCommand) error {
+	if len(commands) > 100 {
+		return ErrTooManyCommands
 	}
-
-	_, err = bot.api.SetMyCommands(tgapi.SetMyCommands{
-		Commands: commands,
-		Scope:    scope,
-	})
+	_, err := bot.api.SetMyCommandsWithContext(ctx, tgapi.SetMyCommands{Scope: scope, Commands: commands})
 	if err != nil {
-		return fmt.Errorf("failed to set commands for scope %q: %w", scope.Type, err)
+		scopeType := tgapi.BotCommandScopeDefaultType
+		if scope != nil {
+			scopeType = scope.Type
+		}
+		return fmt.Errorf("failed to set commands for scope %q: %w", scopeType, err)
 	}
 	return nil
 }

cmd_generator_test.go

@@ -72,7 +72,10 @@ func TestGatherCommandsForPluginReturnsSortedCommands(t *testing.T) {
 	plugin.Command("alpha", exec)
 	plugin.Command("mid", exec)
 
-	commands := gatherCommandsForPlugin(*plugin)
+	commands, err := gatherCommandsForPlugin(*plugin)
+	if err != nil {
+		t.Fatalf("gatherCommandsForPlugin returned error: %v", err)
+	}
 	got := make([]string, 0, len(commands))
 	for _, cmd := range commands {
 		got = append(got, cmd.Command)
@@ -83,3 +86,177 @@ func TestGatherCommandsForPluginReturnsSortedCommands(t *testing.T) {
 		t.Fatalf("unexpected command order: got %v want %v", got, want)
 	}
 }
+
+func TestGeneratedCommandDescriptionBoundaries(t *testing.T) {
+	tests := []struct {
+		name        string
+		description string
+		wantLength  int
+		wantErr     error
+	}{
+		{name: "generated usage", wantLength: len("Usage: /start")},
+		{name: "exact limit", description: strings.Repeat("я", 241), wantLength: 256},
+		{name: "over limit", description: strings.Repeat("я", 242), wantErr: ErrInvalidBotCommandDescription},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			plugin := NewPlugin[NoData]("commands")
+			plugin.Command("start", func(ctx *MessageContext, db NoData) error { return nil }).SetDescription(tt.description)
+			commands, err := gatherCommandsForPlugin(*plugin)
+			if !errors.Is(err, tt.wantErr) {
+				t.Fatalf("expected %v, got %v", tt.wantErr, err)
+			}
+			if err == nil {
+				if got := len([]rune(commands[0].Description)); got != tt.wantLength {
+					t.Fatalf("description length = %d, want %d", got, tt.wantLength)
+				}
+			}
+		})
+	}
+}
+
+func TestAutoGenerateCommandsValidatesBeforeRequest(t *testing.T) {
+	tests := []struct {
+		name    string
+		plugins func(CommandExecutor[NoData]) []Plugin[NoData]
+		wantErr error
+	}{
+		{
+			name: "invalid command",
+			plugins: func(exec CommandExecutor[NoData]) []Plugin[NoData] {
+				plugin := NewPlugin[NoData]("invalid")
+				plugin.Command("UPPER", exec)
+				return []Plugin[NoData]{*plugin}
+			},
+			wantErr: ErrInvalidBotCommand,
+		},
+		{
+			name: "description too long",
+			plugins: func(exec CommandExecutor[NoData]) []Plugin[NoData] {
+				plugin := NewPlugin[NoData]("long")
+				plugin.Command("start", exec).SetDescription(strings.Repeat("я", 257))
+				return []Plugin[NoData]{*plugin}
+			},
+			wantErr: ErrInvalidBotCommandDescription,
+		},
+		{
+			name: "duplicate across plugins",
+			plugins: func(exec CommandExecutor[NoData]) []Plugin[NoData] {
+				first := NewPlugin[NoData]("first")
+				second := NewPlugin[NoData]("second")
+				first.Command("start", exec)
+				second.Command("start", exec)
+				return []Plugin[NoData]{*first, *second}
+			},
+			wantErr: ErrDuplicateBotCommand,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var calls atomic.Int64
+			client := &http.Client{Transport: roundTripFunc(func(req *http.Request) (*http.Response, error) {
+				calls.Add(1)
+				return nil, errors.New("unexpected request")
+			})}
+			api := tgapi.NewAPI(tgapi.NewAPIOpts("token").SetAPIURL("https://example.test").SetHTTPClient(client))
+			defer func() { _ = api.Close() }()
+
+			exec := func(ctx *MessageContext, db NoData) error { return nil }
+			bot := &Bot[NoData]{api: api, logger: sneklog.NewLogger(), plugins: tt.plugins(exec)}
+			defer func() { _ = bot.logger.Close() }()
+
+			err := bot.AutoGenerateCommands()
+			if !errors.Is(err, tt.wantErr) {
+				t.Fatalf("expected %v, got %v", tt.wantErr, err)
+			}
+			if calls.Load() != 0 {
+				t.Fatalf("expected no requests, got %d", calls.Load())
+			}
+		})
+	}
+}
+
+func TestAutoGenerateCommandsReportsPartialScopeUpdate(t *testing.T) {
+	var calls atomic.Int64
+	client := &http.Client{Transport: roundTripFunc(func(req *http.Request) (*http.Response, error) {
+		call := calls.Add(1)
+		body := `{"ok":true,"result":true}`
+		if call == 2 {
+			body = `{"ok":false,"error_code":500,"description":"boom"}`
+		}
+		return &http.Response{
+			StatusCode: http.StatusOK,
+			Header:     http.Header{"Content-Type": []string{"application/json"}},
+			Body:       io.NopCloser(strings.NewReader(body)),
+		}, nil
+	})}
+	api := tgapi.NewAPI(tgapi.NewAPIOpts("token").SetAPIURL("https://example.test").SetHTTPClient(client))
+	defer func() { _ = api.Close() }()
+	plugin := NewPlugin[NoData]("commands")
+	plugin.Command("start", func(ctx *MessageContext, db NoData) error { return nil })
+	bot := &Bot[NoData]{api: api, logger: sneklog.NewLogger(), plugins: []Plugin[NoData]{*plugin}}
+	defer func() { _ = bot.logger.Close() }()
+
+	err := bot.AutoGenerateCommands()
+	if !errors.Is(err, ErrPartialCommandScopeUpdate) {
+		t.Fatalf("expected ErrPartialCommandScopeUpdate, got %v", err)
+	}
+	var partial *CommandScopeUpdateError
+	if !errors.As(err, &partial) {
+		t.Fatalf("expected CommandScopeUpdateError, got %T", err)
+	}
+	if !reflect.DeepEqual(partial.UpdatedScopes, []tgapi.BotCommandScopeType{tgapi.BotCommandScopePrivateType}) {
+		t.Fatalf("unexpected updated scopes: %v", partial.UpdatedScopes)
+	}
+	if partial.FailedScope != tgapi.BotCommandScopeGroupType {
+		t.Fatalf("unexpected failed scope: %q", partial.FailedScope)
+	}
+}
+
+func TestAutoGenerateCommandsForNilScopeUsesSingleAtomicReplacement(t *testing.T) {
+	var methods []string
+	client := &http.Client{
+		Transport: roundTripFunc(func(req *http.Request) (*http.Response, error) {
+			methods = append(methods, req.URL.Path)
+			return &http.Response{
+				StatusCode: http.StatusOK,
+				Header:     http.Header{"Content-Type": []string{"application/json"}},
+				Body:       io.NopCloser(strings.NewReader(`{"ok":true,"result":true}`)),
+			}, nil
+		}),
+	}
+	api := tgapi.NewAPI(
+		tgapi.NewAPIOpts("token").
+			SetAPIURL("https://example.test").
+			SetHTTPClient(client),
+	)
+	defer func() {
+		if err := api.Close(); err != nil {
+			t.Fatalf("Close returned error: %v", err)
+		}
+	}()
+
+	plugin := NewPlugin[NoData]("commands")
+	plugin.Command("start", func(ctx *MessageContext, db NoData) error { return nil })
+	bot := &Bot[NoData]{
+		api:     api,
+		logger:  sneklog.NewLogger(),
+		plugins: []Plugin[NoData]{*plugin},
+	}
+	defer func() {
+		if err := bot.logger.Close(); err != nil {
+			t.Fatalf("Close logger returned error: %v", err)
+		}
+	}()
+
+	if err := bot.AutoGenerateCommandsForScope(nil); err != nil {
+		t.Fatalf("AutoGenerateCommandsForScope returned error: %v", err)
+	}
+	if len(methods) != 1 {
+		t.Fatalf("expected one request, got %d", len(methods))
+	}
+	if !strings.HasSuffix(methods[0], "/setMyCommands") {
+		t.Fatalf("expected setMyCommands request, got %v", methods[0])
+	}
+}

commands.go

@@ -93,6 +93,7 @@ type Command[T AppData] struct {
 	args        extypes.Slice[CommandArg]    // List of expected arguments
 	middlewares extypes.Slice[Middleware[T]] // Optional middleware chain
 	skipAutoCmd bool                         // If true, this command won't be auto-added to help menus
+	isEphemeral bool
 }
 
 // NewCommand creates a new Command with the given identifier, executor, and arguments.
@@ -108,7 +109,9 @@ type Command[T AppData] struct {
 // that fit Telegram's callback_data limit, though the configured payload
 // encoding may impose its own restrictions.
 func NewCommand[T any](command string, exec CommandExecutor[T], args ...CommandArg) *Command[T] {
-	return &Command[T]{command, "", exec, args, make(extypes.Slice[Middleware[T]], 0), false}
+	return &Command[T]{
+		command, "", exec, args, make(extypes.Slice[Middleware[T]], 0), false, false,
+	}
 }
 
 // Use adds a middleware to the command's execution chain.
@@ -130,6 +133,14 @@ func (c *Command[T]) SkipCommandAutoGen() *Command[T] {
 	return c
 }
 
+// SetEphemeral controls whether Telegram treats the command as ephemeral.
+//
+// Since: Bot API 10.2
+func (c *Command[T]) SetEphemeral(b bool) *Command[T] {
+	c.isEphemeral = b
+	return c
+}
+
 func (c *Command[T]) validateArgs(args []string) error {
 	for i := range c.args.Len() {
 		if i >= len(args) && c.args.Get(i).required {

drafts.go

@@ -45,10 +45,8 @@ type DraftProvider struct {
 	generator draftIDGenerator
 }
 
-// NewRandomDraftProvider creates a new DraftProvider using random draft IDs.
-//
-// The provider will use random numbers for draft IDs.
-// All drafts created via this provider will have unpredictable, unique IDs.
+// NewRandomDraftProvider creates a DraftProvider using non-cryptographic random IDs.
+// Zero values and collisions with active drafts are retried.
 func NewRandomDraftProvider(api *tgapi.API) *DraftProvider {
 	return &DraftProvider{
 		api: api, generator: &RandomDraftIDGenerator{},
@@ -121,7 +119,9 @@ type Draft struct {
 	parseMode       tgapi.ParseMode
 	entities        []tgapi.MessageEntity
 
-	ID      uint64
+	// ID uniquely identifies the draft within its provider.
+	ID uint64
+	// Message contains the current draft text.
 	Message string
 }
 
@@ -129,7 +129,19 @@ type Draft struct {
 //
 // The caller must set a chat with SetChat before Push or Flush.
 func (p *DraftProvider) NewDraft(parseMode tgapi.ParseMode) *Draft {
-	id := p.generator.Next()
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	var id uint64
+	for {
+		id = p.generator.Next()
+		if id == 0 {
+			continue
+		}
+		if _, exists := p.drafts[id]; !exists {
+			break
+		}
+	}
 	draft := &Draft{
 		api:       p.api,
 		provider:  p,
@@ -137,9 +149,7 @@ func (p *DraftProvider) NewDraft(parseMode tgapi.ParseMode) *Draft {
 		ID:        id,
 		Message:   "",
 	}
-	p.mu.Lock()
 	p.drafts[id] = draft
-	p.mu.Unlock()
 	return draft
 }
 
@@ -154,10 +164,9 @@ func (d *Draft) SetChat(chatID int64, messageThreadID int) *Draft {
 
 // SetEntities replaces the draft's message entities.
 //
-// Entities are stored by reference. If you plan to mutate the slice later,
-// pass a copy: `SetEntities(append([]tgapi.MessageEntity{}, myEntities...))`.
+// The entities slice is copied.
 func (d *Draft) SetEntities(entities []tgapi.MessageEntity) *Draft {
-	d.entities = entities
+	d.entities = append([]tgapi.MessageEntity(nil), entities...)
 	return d
 }
 
@@ -212,6 +221,7 @@ func (d *Draft) Delete() {
 // If the draft is empty, Flush() returns nil without calling the API.
 func (d *Draft) Flush() error {
 	if d.Message == "" {
+		d.Delete()
 		return nil
 	}
 	if d.chatID == 0 {
@@ -220,6 +230,9 @@ func (d *Draft) Flush() error {
 	if err := validateMessageText(d.Message); err != nil {
 		return err
 	}
+	if d.api == nil {
+		return ErrAPIIsNil
+	}
 
 	params := tgapi.SendMessage{
 		ChatID:    d.chatID,
@@ -252,6 +265,9 @@ func (d *Draft) push(text string) error {
 		return err
 	}
 	d.Message = candidate
+	if d.api == nil {
+		return ErrAPIIsNil
+	}
 	params := tgapi.SendMessageDraft{
 		ChatID:    d.chatID,
 		DraftID:   d.ID,

drafts_test.go

@@ -9,6 +9,17 @@ import (
 	"git.scuroneko.dev/scuroneko/sneklog/v2"
 )
 
+type sequenceDraftIDGenerator struct {
+	ids []uint64
+	pos int
+}
+
+func (g *sequenceDraftIDGenerator) Next() uint64 {
+	id := g.ids[g.pos]
+	g.pos++
+	return id
+}
+
 func TestDraftFlushRequiresChatID(t *testing.T) {
 	draft := NewRandomDraftProvider(&tgapi.API{}).NewDraft(tgapi.ParseNone)
 	draft.Message = "hello"
@@ -18,6 +29,32 @@ func TestDraftFlushRequiresChatID(t *testing.T) {
 	}
 }
 
+func TestDraftFlushEmptyRemovesDraft(t *testing.T) {
+	provider := NewLinearDraftProvider(nil, 0)
+	draft := provider.NewDraft(tgapi.ParseNone)
+
+	if err := draft.Flush(); err != nil {
+		t.Fatalf("Flush returned error: %v", err)
+	}
+	if _, ok := provider.GetDraft(draft.ID); ok {
+		t.Fatal("empty flushed draft remained in provider")
+	}
+}
+
+func TestDraftFlushAllRemovesClearedDrafts(t *testing.T) {
+	provider := NewLinearDraftProvider(nil, 0)
+	draft := provider.NewDraft(tgapi.ParseNone)
+	draft.Message = "discarded"
+	draft.Clear()
+
+	if err := provider.FlushAll(); err != nil {
+		t.Fatalf("FlushAll returned error: %v", err)
+	}
+	if _, ok := provider.GetDraft(draft.ID); ok {
+		t.Fatal("cleared draft remained in provider")
+	}
+}
+
 func TestMsgContextNewDraftWorksWithoutLimiter(t *testing.T) {
 	ctx := &MessageContext{
 		API: &tgapi.API{},
@@ -38,6 +75,34 @@ func TestMsgContextNewDraftWorksWithoutLimiter(t *testing.T) {
 	}
 }
 
+func TestDraftProviderSkipsZeroAndCollidingIDs(t *testing.T) {
+	provider := &DraftProvider{
+		api:       &tgapi.API{},
+		drafts:    make(map[uint64]*Draft),
+		generator: &sequenceDraftIDGenerator{ids: []uint64{0, 7, 7, 8}},
+	}
+
+	first := provider.NewDraft(tgapi.ParseNone)
+	second := provider.NewDraft(tgapi.ParseNone)
+	if first.ID != 7 || second.ID != 8 {
+		t.Fatalf("unexpected draft IDs: first=%d second=%d", first.ID, second.ID)
+	}
+	if got := len(provider.drafts); got != 2 {
+		t.Fatalf("collision overwrote a draft: got %d drafts", got)
+	}
+}
+
+func TestDraftReturnsErrorWhenAPIIsNil(t *testing.T) {
+	draft := NewLinearDraftProvider(nil, 0).NewDraft(tgapi.ParseNone).SetChat(42, 0)
+	if err := draft.Push("hello"); !errors.Is(err, ErrAPIIsNil) {
+		t.Fatalf("expected ErrAPIIsNil from Push, got %v", err)
+	}
+	draft.Message = "hello"
+	if err := draft.Flush(); !errors.Is(err, ErrAPIIsNil) {
+		t.Fatalf("expected ErrAPIIsNil from Flush, got %v", err)
+	}
+}
+
 func TestDraftFlushRejectsLongMessage(t *testing.T) {
 	draft := NewRandomDraftProvider(&tgapi.API{}).NewDraft(tgapi.ParseNone).SetChat(42, 0)
 	draft.Message = strings.Repeat("a", maxMessageTextLen+1)

error_model.go

@@ -8,6 +8,7 @@ type classifiedError struct {
 	internalOnly bool
 }
 
+// Error returns the underlying error message.
 func (e *classifiedError) Error() string {
 	if e == nil || e.err == nil {
 		return ""
@@ -15,6 +16,7 @@ func (e *classifiedError) Error() string {
 	return e.err.Error()
 }
 
+// Unwrap returns the underlying error.
 func (e *classifiedError) Unwrap() error {
 	if e == nil {
 		return nil

errors.go

@@ -38,6 +38,8 @@ var (
 	ErrAPIIsNil = errors.New("api is nil")
 	// ErrMessageIDZero reports that an operation requires a non-zero message ID.
 	ErrMessageIDZero = errors.New("message ID is zero")
+	// ErrCodecIsNil reports that a config operation received a nil codec.
+	ErrCodecIsNil = errors.New("codec is nil")
 )
 var (
 	// ErrBindArgsTargetNotPointer reports that BindArgs received a nil or non-pointer destination.
@@ -60,6 +62,20 @@ var (
 	ErrSceneEntryNotSet = errors.New("scene entry step not set")
 	// ErrSceneRuntimeNil reports that scene APIs were used without an attached runtime.
 	ErrSceneRuntimeNil = errors.New("scene runtime is nil")
+	// ErrInvalidSceneAction reports a SceneResult with an unknown action.
+	ErrInvalidSceneAction = errors.New("invalid scene action")
+	// ErrHandlerExecutorNil reports an attempted registration or execution of a nil handler.
+	ErrHandlerExecutorNil = errors.New("handler executor is nil")
+	// ErrHandlerPanic reports a panic recovered from a user handler.
+	ErrHandlerPanic = errors.New("handler panicked")
+	// ErrObserverShutdownTimeout reports that observer callbacks did not stop before shutdown timed out.
+	ErrObserverShutdownTimeout = errors.New("observer shutdown timed out")
+	// ErrInlineKeyboardButtonAction reports a button without exactly one action.
+	ErrInlineKeyboardButtonAction = errors.New("inline keyboard button must have exactly one action")
+	// ErrCallbackDataLength reports callback data outside Telegram's 1-64 byte range.
+	ErrCallbackDataLength = errors.New("callback data must be between 1 and 64 bytes")
+	// ErrInlineKeyboardRowTooLong reports a row exceeding the configured maximum.
+	ErrInlineKeyboardRowTooLong = errors.New("inline keyboard row exceeds maximum size")
 )
 
 var (
@@ -69,6 +85,8 @@ var (
 	ErrNoBotWebhookOptsURL = errors.New("empty BotWebhookOpts.URL")
 	// ErrBotWebhookOptsMaxConnectionsRange reports that BotWebhookOpts.MaxConnections is out of range.
 	ErrBotWebhookOptsMaxConnectionsRange = errors.New("BotWebhookOpts.MaxConnections must be between 1 and 100")
+	// ErrBotWebhookOptsSecretTokenInvalid reports that SecretToken violates Telegram's format.
+	ErrBotWebhookOptsSecretTokenInvalid = errors.New("BotWebhookOpts.SecretToken must be 1-256 characters from A-Z, a-z, 0-9, _ and -")
 	// ErrBotUploaderWhenCertificate reports that a certificate was set without an uploader.
 	ErrBotUploaderWhenCertificate = errors.New("bot uploader nil, but certificate set")
 	// ErrStatusPathSecretRequired reports that UseStatusPath requires SecretToken to be set.

handler.go

@@ -51,6 +51,8 @@ func (bot *Bot[T]) handle(parentCtx context.Context, u *tgapi.Update) {
 		draftProvider: bot.draftProvider,
 		sceneRuntime:  bot,
 		observer:      bot.observer,
+		eventEmitter:  bot.safeEmitEvent,
+		asyncTask:     bot.startAsyncTask,
 		payloadType:   bot.payloadType,
 		botID:         bot.userID,
 		ctx:           ctx,
@@ -79,7 +81,7 @@ func (bot *Bot[T]) handle(parentCtx context.Context, u *tgapi.Update) {
 
 	sceneHandled, err := bot.tryHandleScene(msgCtx)
 	if err != nil {
-		bot.logger.Errorln(err)
+		msgCtx.error(err)
 		bot.safeEmitEvent(ctx, UpdateHandledEvent{
 			UpdateID:   u.UpdateID,
 			UpdateType: u.Type,
@@ -88,17 +90,20 @@ func (bot *Bot[T]) handle(parentCtx context.Context, u *tgapi.Update) {
 			Duration:   time.Since(startTime),
 			Handled:    false,
 		})
-		bot.safeEmitEvent(ctx, ErrorEvent{
-			UpdateID:    u.UpdateID,
-			UpdateType:  u.Type,
-			Plugin:      "bot",
-			HandlerKind: HandlerSceneKind,
-			HandlerName: "tryHandleScene",
-			FromID:      msgCtx.FromID,
-			ChatID:      msgCtx.ChatID,
-			Err:         err,
-			UserFacing:  false,
-		})
+		var reported *reportedSceneError
+		if !errors.As(err, &reported) {
+			bot.safeEmitEvent(ctx, ErrorEvent{
+				UpdateID:    u.UpdateID,
+				UpdateType:  u.Type,
+				Plugin:      "bot",
+				HandlerKind: HandlerSceneKind,
+				HandlerName: "tryHandleScene",
+				FromID:      msgCtx.FromID,
+				ChatID:      msgCtx.ChatID,
+				Err:         err,
+				UserFacing:  IsUserError(err),
+			})
+		}
 		return
 	}
 	if sceneHandled {

handler_test.go

@@ -3,7 +3,11 @@ package laniakea
 import (
 	"context"
 	"errors"
+	"io"
+	"net/http"
+	"strings"
 	"testing"
+	"time"
 
 	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
 	"git.scuroneko.dev/scuroneko/sneklog/v2"
@@ -318,6 +322,15 @@ func TestPrepareUpdateCtxContract(t *testing.T) {
 			wantFrom:   true,
 			wantFromID: 115,
 		},
+		{
+			name: "anonymous poll answer",
+			update: &tgapi.Update{
+				Type:       tgapi.UpdateTypePollAnswer,
+				PollAnswer: &tgapi.PollAnswer{VoterChat: tgapi.Chat{ID: -2007}},
+			},
+			wantChat:   true,
+			wantChatID: -2007,
+		},
 		{
 			name: "message reaction",
 			update: &tgapi.Update{
@@ -368,8 +381,64 @@ func TestPrepareUpdateCtxContract(t *testing.T) {
 			name: "message reaction count",
 			update: &tgapi.Update{
 				Type:                 tgapi.UpdateTypeMessageReactionCount,
-				MessageReactionCount: &tgapi.MessageReactionCountUpdated{},
+				MessageReactionCount: &tgapi.MessageReactionCountUpdated{Chat: &tgapi.Chat{ID: -2008}},
 			},
+			wantChat:   true,
+			wantChatID: -2008,
+		},
+		{
+			name: "guest message",
+			update: &tgapi.Update{
+				Type: tgapi.UpdateTypeGuestMessage,
+				GuestMessage: &tgapi.Message{
+					From: &tgapi.User{ID: 119},
+					Chat: &tgapi.Chat{ID: -2009},
+				},
+			},
+			wantMsg:    true,
+			wantFrom:   true,
+			wantFromID: 119,
+			wantChat:   true,
+			wantChatID: -2009,
+		},
+		{
+			name: "deleted business messages",
+			update: &tgapi.Update{
+				Type:                    tgapi.UpdateTypeDeletedBusinessMessages,
+				DeletedBusinessMessages: &tgapi.BusinessMessagesDeleted{Chat: tgapi.Chat{ID: -2010}},
+			},
+			wantChat:   true,
+			wantChatID: -2010,
+		},
+		{
+			name: "managed bot",
+			update: &tgapi.Update{
+				Type:       tgapi.UpdateTypeManagedBot,
+				ManagedBot: &tgapi.ManagedBotUpdated{User: tgapi.User{ID: 120}},
+			},
+			wantFrom:   true,
+			wantFromID: 120,
+		},
+		{
+			name: "subscription",
+			update: &tgapi.Update{
+				Type:         tgapi.UpdateTypeSubscription,
+				Subscription: &tgapi.BotSubscriptionUpdated{User: tgapi.User{ID: 121}},
+			},
+			wantFrom:   true,
+			wantFromID: 121,
+		},
+		{
+			name: "giveaway chat boost has no user",
+			update: &tgapi.Update{
+				Type: tgapi.UpdateTypeChatBoost,
+				ChatBoost: &tgapi.ChatBoostUpdated{
+					Chat:  tgapi.Chat{ID: -2011},
+					Boost: tgapi.ChatBoost{Source: tgapi.ChatBoostSource{Source: "giveaway"}},
+				},
+			},
+			wantChat:   true,
+			wantChatID: -2011,
 		},
 	}
 
@@ -1233,6 +1302,8 @@ func TestParseCommandTable(t *testing.T) {
 		{name: "plain text", text: "hello", wantPrefix: "", wantCmd: "", wantArgs: ""},
 		{name: "command no args", text: "/start", wantPrefix: "/", wantCmd: "start", wantArgs: ""},
 		{name: "command with args", text: "/ban 42 reason", wantPrefix: "/", wantCmd: "ban", wantArgs: "42 reason"},
+		{name: "tab separator", text: "/ban\t42", wantPrefix: "/", wantCmd: "ban", wantArgs: "42"},
+		{name: "newline separator", text: "/ban\n42", wantPrefix: "/", wantCmd: "ban", wantArgs: "42"},
 		{name: "alternate prefix", text: "!ping", wantPrefix: "!", wantCmd: "ping", wantArgs: ""},
 		{name: "leading space after prefix", text: "/  start now", wantPrefix: "/", wantCmd: "start", wantArgs: "now"},
 		{name: "command with botname", text: "/start@mybot extra", wantPrefix: "/", wantCmd: "start@mybot", wantArgs: "extra"},
@@ -1264,6 +1335,7 @@ func TestHandleMessageStripsBotUsernameSuffix(t *testing.T) {
 	}{
 		{name: "matching botname", botUsername: "mybot", text: "/start@mybot hello", wantCalled: true},
 		{name: "matching botname no args", botUsername: "mybot", text: "/start@mybot", wantCalled: true},
+		{name: "matching botname ignores case", botUsername: "MyBot", text: "/start@mybot", wantCalled: true},
 		{name: "other botname", botUsername: "mybot", text: "/start@otherbot hello", wantCalled: false},
 		{name: "no botname", botUsername: "mybot", text: "/start hello", wantCalled: true},
 		{name: "bot has no username", botUsername: "", text: "/start@mybot hello", wantCalled: false},
@@ -1313,14 +1385,14 @@ func TestHandlePanicEmitsErrorEvent(t *testing.T) {
 			name:      "error value",
 			panicWith: errors.New("boom"),
 			matchErr: func(err error) bool {
-				return err != nil && err.Error() == "boom"
+				return errors.Is(err, ErrHandlerPanic) && strings.Contains(err.Error(), "boom")
 			},
 		},
 		{
 			name:      "string value",
 			panicWith: "kaboom",
 			matchErr: func(err error) bool {
-				return err != nil && err.Error() == "kaboom"
+				return errors.Is(err, ErrHandlerPanic) && strings.Contains(err.Error(), "kaboom")
 			},
 		},
 	}
@@ -1354,7 +1426,7 @@ func TestHandlePanicEmitsErrorEvent(t *testing.T) {
 			panicEvent := (*ErrorEvent)(nil)
 			for i := range observer.errors {
 				ev := observer.errors[i]
-				if ev.Plugin == "" && ev.HandlerKind == "" && ev.UpdateID == 100 {
+				if ev.Plugin == "test" && ev.HandlerKind == HandlerCommandKind && ev.UpdateID == 100 {
 					panicEvent = &ev
 					break
 				}
@@ -1371,10 +1443,217 @@ func TestHandlePanicEmitsErrorEvent(t *testing.T) {
 			if !tt.matchErr(panicEvent.Err) {
 				t.Fatalf("unexpected panic Err: %v", panicEvent.Err)
 			}
+			if len(observer.finished) != 1 || !errors.Is(observer.finished[0].Err, ErrHandlerPanic) {
+				t.Fatalf("expected balanced HandlerFinishedEvent, got %#v", observer.finished)
+			}
+			if len(observer.handled) != 1 || !observer.handled[0].Handled {
+				t.Fatalf("expected completed handled update, got %#v", observer.handled)
+			}
 		})
 	}
 }
 
+func TestSceneUserErrorIsDeliveredOnce(t *testing.T) {
+	failing := func(*SceneContext, NoData) (SceneResult, error) {
+		return SceneResult{}, AsUserError(errors.New("try again"))
+	}
+	tests := []struct {
+		name   string
+		step   string
+		kind   HandlerEventKind
+		setup  func(*Scene[NoData])
+		update func() tgapi.Update
+	}{
+		{
+			name: "step", step: "start", kind: HandlerSceneStepKind,
+			setup:  func(scene *Scene[NoData]) { scene.OnStep("start", failing) },
+			update: func() tgapi.Update { return sceneMessageUpdate(101, "hello") },
+		},
+		{
+			name: "command", step: "start", kind: HandlerSceneCommandKind,
+			setup:  func(scene *Scene[NoData]) { scene.OnCommand("fail", failing) },
+			update: func() tgapi.Update { return sceneMessageUpdate(102, "/fail") },
+		},
+		{
+			name: "payload", step: "start", kind: HandlerScenePayloadKind,
+			setup: func(scene *Scene[NoData]) { scene.OnPayload("fail", failing) },
+			update: func() tgapi.Update {
+				data, err := encodeJSONPayload(CallbackData{Command: "fail"})
+				if err != nil {
+					t.Fatalf("encodeJSONPayload returned error: %v", err)
+				}
+				return tgapi.Update{
+					UpdateID: 103,
+					Type:     tgapi.UpdateTypeCallbackQuery,
+					CallbackQuery: &tgapi.CallbackQuery{
+						ID: "callback", Data: data, From: tgapi.User{ID: 1},
+						Message: &tgapi.Message{MessageID: 1, Chat: &tgapi.Chat{ID: 42, Type: tgapi.ChatTypePrivate}},
+					},
+				}
+			},
+		},
+		{
+			name: "message fallback", step: "missing", kind: HandlerSceneMessageKind,
+			setup:  func(scene *Scene[NoData]) { scene.OnMessage(failing) },
+			update: func() tgapi.Update { return sceneMessageUpdate(104, "hello") },
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			requests := 0
+			client := &http.Client{Transport: roundTripFunc(func(req *http.Request) (*http.Response, error) {
+				requests++
+				result := `true`
+				if !strings.HasSuffix(req.URL.Path, "/answerCallbackQuery") {
+					result = `{"message_id":1,"date":0,"chat":{"id":42,"type":"private"}}`
+				}
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       io.NopCloser(strings.NewReader(`{"ok":true,"result":` + result + `}`)),
+					Header:     make(http.Header),
+				}, nil
+			})}
+			api := tgapi.NewAPI(tgapi.NewAPIOpts("token").SetAPIURL("https://example.test").SetHTTPClient(client))
+			defer func() { _ = api.Close() }()
+
+			scene := NewScene[NoData]("signup")
+			tt.setup(scene)
+			plugin := NewPlugin[NoData]("scene-plugin")
+			plugin.AddScene(scene)
+			store := NewMemorySessionStore()
+			if err := store.Set("user_id:1:chat_id:42", SceneSession{Scene: "signup", Step: tt.step}); err != nil {
+				t.Fatalf("Set returned error: %v", err)
+			}
+			observer := &recordingObserver{}
+			bot := &Bot[NoData]{
+				api: api, logger: sneklog.NewLogger(), errorTemplate: "error: %s",
+				plugins: []Plugin[NoData]{clonePlugin(plugin)}, observer: observer,
+				sessionStore: store, sceneScopePriority: []SceneScope{SceneScopeUserChat},
+				prefixes: []string{"/"}, payloadType: BotPayloadJSON,
+			}
+			defer func() { _ = bot.logger.Close() }()
+
+			update := tt.update()
+			bot.handle(context.Background(), &update)
+
+			if requests != 1 {
+				t.Fatalf("expected one user-facing reply, got %d requests", requests)
+			}
+			if len(observer.errors) != 1 {
+				t.Fatalf("expected one ErrorEvent, got %#v", observer.errors)
+			}
+			if event := observer.errors[0]; event.Plugin != "scene-plugin" || event.HandlerKind != tt.kind || !event.UserFacing {
+				t.Fatalf("unexpected scene ErrorEvent: %#v", event)
+			}
+		})
+	}
+}
+
+func TestPolicyEventsUseConfiguredEmitter(t *testing.T) {
+	directObserver := &recordingObserver{}
+	emitted := 0
+	ctx := &MessageContext{
+		observer: directObserver,
+		eventEmitter: func(_ context.Context, event Event) {
+			if _, ok := event.(PolicyCheckedEvent); !ok {
+				t.Fatalf("unexpected event type %T", event)
+			}
+			emitted++
+		},
+	}
+
+	ctx.emitPolicyChecked(PolicyCheckedEvent{Name: "admin", Passed: true})
+	if emitted != 1 {
+		t.Fatalf("emitter call count = %d, want 1", emitted)
+	}
+	if len(directObserver.policies) != 0 {
+		t.Fatalf("policy bypassed configured emitter: %#v", directObserver.policies)
+	}
+}
+
+func sceneMessageUpdate(updateID int, text string) tgapi.Update {
+	return tgapi.Update{
+		UpdateID: updateID,
+		Type:     tgapi.UpdateTypeMessage,
+		Message: &tgapi.Message{
+			MessageID: 1,
+			Text:      text,
+			From:      &tgapi.User{ID: 1},
+			Chat:      &tgapi.Chat{ID: 42, Type: tgapi.ChatTypePrivate},
+		},
+	}
+}
+
+func TestHandleDoesNotSerializeUnrelatedUsersWithoutScene(t *testing.T) {
+	started := make(chan struct{}, 2)
+	release := make(chan struct{})
+	plugin := NewPlugin[NoData]("commands")
+	plugin.Command("work", func(*MessageContext, NoData) error {
+		started <- struct{}{}
+		<-release
+		return nil
+	})
+	bot := &Bot[NoData]{
+		logger:             sneklog.NewLogger(),
+		plugins:            []Plugin[NoData]{clonePlugin(plugin)},
+		prefixes:           []string{"/"},
+		sessionStore:       NewMemorySessionStore(),
+		sceneScopePriority: []SceneScope{SceneScopeUserChat, SceneScopeChat, SceneScopeUser},
+	}
+	defer func() { _ = bot.logger.Close() }()
+
+	updateFor := func(id int) tgapi.Update {
+		return tgapi.Update{UpdateID: id, Type: tgapi.UpdateTypeMessage, Message: &tgapi.Message{
+			MessageID: id, Text: "/work", From: &tgapi.User{ID: int64(id)},
+			Chat: &tgapi.Chat{ID: 42, Type: tgapi.ChatTypeSupergroup},
+		}}
+	}
+	done := make(chan struct{}, 2)
+	for id := 1; id <= 2; id++ {
+		update := updateFor(id)
+		go func() {
+			bot.handle(context.Background(), &update)
+			done <- struct{}{}
+		}()
+	}
+	for range 2 {
+		select {
+		case <-started:
+		case <-time.After(time.Second):
+			close(release)
+			t.Fatal("updates from unrelated users in one chat were serialized")
+		}
+	}
+	close(release)
+	<-done
+	<-done
+}
+
+func TestCommandMiddlewareBlockIsNotReportedAsError(t *testing.T) {
+	called := false
+	plugin := NewPlugin[NoData]("commands")
+	plugin.Command("blocked", func(*MessageContext, NoData) error {
+		called = true
+		return nil
+	}).Use(NewMiddleware("deny", func(*MessageContext, NoData) bool { return false }))
+	observer := &recordingObserver{}
+	bot := &Bot[NoData]{
+		logger: sneklog.NewLogger(), plugins: []Plugin[NoData]{clonePlugin(plugin)},
+		prefixes: []string{"/"}, observer: observer, sessionStore: NewMemorySessionStore(),
+	}
+	defer func() { _ = bot.logger.Close() }()
+	update := sceneMessageUpdate(201, "/blocked")
+	bot.handle(context.Background(), &update)
+
+	if called {
+		t.Fatal("command executed after middleware blocked it")
+	}
+	if len(observer.errors) != 0 {
+		t.Fatalf("middleware block emitted errors: %#v", observer.errors)
+	}
+}
+
 func TestHandleCallbackObserverEmitsDecodeErrors(t *testing.T) {
 	observer := &recordingObserver{}
 	bot := &Bot[NoData]{

keyboard.go

@@ -24,7 +24,7 @@ const (
 //   - SetURL() — makes button open a URL
 //   - SetCallbackDataJSON() — attaches structured command + args for bot handling
 //
-// Call build() to produce the final tgapi.InlineKeyboardButton.
+// Call Build to validate and produce the final tgapi.InlineKeyboardButton.
 // Builder methods are immutable — each returns a copy.
 type InlineKeyboardButtonBuilder struct {
 	text    string
@@ -59,9 +59,12 @@ func (b InlineKeyboardButtonBuilder) SetStyle(style tgapi.KeyboardButtonStyle) I
 }
 
 // SetURL sets a URL that will be opened when the button is pressed.
-// If both URL and CallbackData are set, Telegram will prioritize URL.
+// It clears callback data because Telegram requires exactly one button action.
 func (b InlineKeyboardButtonBuilder) SetURL(url string) InlineKeyboardButtonBuilder {
 	b.url = url
+	if url != "" {
+		b.data = ""
+	}
 	return b
 }
 
@@ -79,26 +82,29 @@ func (b InlineKeyboardButtonBuilder) SetPayloadType(t BotPayloadType) InlineKeyb
 //
 // Example: SetCallbackDataJSON("delete_user", 123, "confirm") → {"cmd":"delete_user","args":["123","confirm"]}.
 func (b InlineKeyboardButtonBuilder) SetCallbackDataJSON(cmd string, args ...any) InlineKeyboardButtonBuilder {
+	b.url = ""
 	b.data = NewCallbackData(cmd, args...).ToJSON()
 	return b
 }
 
-// SetCallbackDataBase64 sets a structured callback payload encoded as Base64.
-// This can be useful when the JSON payload exceeds Telegram's callback data length limit.
-// Args are converted to strings using fmt.Sprint.
+// SetCallbackDataBase64 sets a Base64-encoded structured callback payload.
+// Base64 does not bypass Telegram's 64-byte callback-data limit.
 func (b InlineKeyboardButtonBuilder) SetCallbackDataBase64(cmd string, args ...any) InlineKeyboardButtonBuilder {
+	b.url = ""
 	b.data = NewCallbackData(cmd, args...).ToBase64()
 	return b
 }
 
 // SetCallbackDataCompact sets a structured callback payload encoded as compact text.
 func (b InlineKeyboardButtonBuilder) SetCallbackDataCompact(cmd string, args ...any) InlineKeyboardButtonBuilder {
+	b.url = ""
 	b.data = NewCallbackData(cmd, args...).ToCompact()
 	return b
 }
 
 // SetCallbackDataCompactBase64 sets a compact callback payload encoded as Base64.
 func (b InlineKeyboardButtonBuilder) SetCallbackDataCompactBase64(cmd string, args ...any) InlineKeyboardButtonBuilder {
+	b.url = ""
 	b.data = NewCallbackData(cmd, args...).ToCompactBase64()
 	return b
 }
@@ -106,6 +112,7 @@ func (b InlineKeyboardButtonBuilder) SetCallbackDataCompactBase64(cmd string, ar
 // SetCallbackData sets a structured callback payload using the configured payload type.
 // The default payload type is JSON.
 func (b InlineKeyboardButtonBuilder) SetCallbackData(cmd string, args ...any) InlineKeyboardButtonBuilder {
+	b.url = ""
 	switch b.payloadType {
 	case BotPayloadJSON:
 		b.data = NewCallbackData(cmd, args...).ToJSON()
@@ -131,6 +138,20 @@ func (b InlineKeyboardButtonBuilder) build() tgapi.InlineKeyboardButton {
 	}
 }
 
+// Validate checks that the button has exactly one action and valid callback data.
+func (b InlineKeyboardButtonBuilder) Validate() error {
+	return validateInlineKeyboardButton(b.build())
+}
+
+// Build validates and returns the configured inline keyboard button.
+func (b InlineKeyboardButtonBuilder) Build() (tgapi.InlineKeyboardButton, error) {
+	button := b.build()
+	if err := validateInlineKeyboardButton(button); err != nil {
+		return tgapi.InlineKeyboardButton{}, err
+	}
+	return button, nil
+}
+
 // InlineKeyboard is a stateful builder for constructing Telegram inline keyboard layouts.
 //
 // Buttons are added row-by-row. When a row reaches maxRow, it is automatically flushed.
@@ -138,9 +159,11 @@ func (b InlineKeyboardButtonBuilder) build() tgapi.InlineKeyboardButton {
 //
 // The keyboard is not thread-safe. Build it in a single goroutine.
 type InlineKeyboard struct {
-	CurrentLine extypes.Slice[tgapi.InlineKeyboardButton] // Current row being built
-	Lines       [][]tgapi.InlineKeyboardButton            // Completed rows
-	maxRow      int                                       // Max buttons per row (e.g., 3 or 4)
+	// CurrentLine is the row currently being built.
+	CurrentLine extypes.Slice[tgapi.InlineKeyboardButton]
+	// Lines contains completed keyboard rows.
+	Lines  [][]tgapi.InlineKeyboardButton
+	maxRow int // Max buttons per row (e.g., 3 or 4)
 
 	payloadType BotPayloadType // Serialization format for callback data (JSON or Base64)
 }
@@ -196,7 +219,8 @@ func (in *InlineKeyboard) SetPayloadType(t BotPayloadType) *InlineKeyboard {
 func (in *InlineKeyboard) GetPayloadType() BotPayloadType { return in.payloadType }
 
 // SetMaxRow sets the maximum number of buttons appended to a row before the
-// keyboard automatically starts a new line.
+// keyboard automatically starts a new line. Values <= 0 retain the legacy
+// unlimited-row behavior; this convention is subject to change in v2.
 func (in *InlineKeyboard) SetMaxRow(maxRow int) *InlineKeyboard {
 	in.maxRow = maxRow
 	return in
@@ -206,7 +230,7 @@ func (in *InlineKeyboard) SetMaxRow(maxRow int) *InlineKeyboard {
 func (in *InlineKeyboard) GetMaxRow() int { return in.maxRow }
 
 func (in *InlineKeyboard) append(button tgapi.InlineKeyboardButton) *InlineKeyboard {
-	if in.CurrentLine.Len() == in.maxRow {
+	if in.maxRow > 0 && in.CurrentLine.Len() >= in.maxRow {
 		in.AddLine()
 	}
 	in.CurrentLine = in.CurrentLine.Push(button)
@@ -269,7 +293,67 @@ func (in *InlineKeyboard) Get() *tgapi.ReplyMarkup {
 	if in.CurrentLine.Len() > 0 {
 		in.AddLine()
 	}
-	return &tgapi.ReplyMarkup{InlineKeyboard: in.Lines}
+	lines := make([][]tgapi.InlineKeyboardButton, len(in.Lines))
+	for i := range in.Lines {
+		lines[i] = append([]tgapi.InlineKeyboardButton(nil), in.Lines[i]...)
+	}
+	return &tgapi.ReplyMarkup{InlineKeyboard: lines}
+}
+
+// GetValidated finalizes and validates the keyboard before returning it.
+//
+// Existing fluent Add* methods remain error-free for v1 compatibility. Their
+// signatures are subject to change in v2; new code should use GetValidated.
+func (in *InlineKeyboard) GetValidated() (*tgapi.ReplyMarkup, error) {
+	markup := in.Get()
+	if err := in.validateMarkup(markup); err != nil {
+		return nil, err
+	}
+	return markup, nil
+}
+
+// Validate checks completed and pending rows without finalizing the keyboard.
+func (in *InlineKeyboard) Validate() error {
+	lines := make([][]tgapi.InlineKeyboardButton, 0, len(in.Lines)+1)
+	lines = append(lines, in.Lines...)
+	if len(in.CurrentLine) > 0 {
+		lines = append(lines, in.CurrentLine)
+	}
+	return in.validateMarkup(&tgapi.ReplyMarkup{InlineKeyboard: lines})
+}
+
+func (in *InlineKeyboard) validateMarkup(markup *tgapi.ReplyMarkup) error {
+	for rowIndex, row := range markup.InlineKeyboard {
+		if in.maxRow > 0 && len(row) > in.maxRow {
+			return fmt.Errorf("%w: row %d has %d buttons, limit %d", ErrInlineKeyboardRowTooLong, rowIndex, len(row), in.maxRow)
+		}
+		for columnIndex, button := range row {
+			if err := validateInlineKeyboardButton(button); err != nil {
+				return fmt.Errorf("row %d button %d: %w", rowIndex, columnIndex, err)
+			}
+		}
+	}
+	return nil
+}
+
+func validateInlineKeyboardButton(button tgapi.InlineKeyboardButton) error {
+	actions := 0
+	if button.URL != "" {
+		actions++
+	}
+	if button.CallbackData != "" {
+		actions++
+	}
+	if actions != 1 {
+		return ErrInlineKeyboardButtonAction
+	}
+	if button.CallbackData != "" {
+		length := len([]byte(button.CallbackData))
+		if length < 1 || length > 64 {
+			return fmt.Errorf("%w: got %d", ErrCallbackDataLength, length)
+		}
+	}
+	return nil
 }
 
 // CallbackData represents the structured payload sent when an inline button
@@ -282,8 +366,10 @@ func (in *InlineKeyboard) Get() *tgapi.ReplyMarkup {
 //
 //	{"cmd":"delete_user","args":["123","confirm"]}
 type CallbackData struct {
-	Command string   `json:"cmd"`  // The command name to route to
-	Args    []string `json:"args"` // Arguments passed as strings
+	// Command is the command name used for payload routing.
+	Command string `json:"cmd"`
+	// Args contains the string arguments passed to the payload handler.
+	Args []string `json:"args"`
 }
 
 // NewCallbackData creates a new CallbackData instance with the given command and args.
@@ -297,10 +383,7 @@ func NewCallbackData(command string, args ...any) CallbackData {
 	for i, arg := range args {
 		stringArgs[i] = fmt.Sprint(arg)
 	}
-	return CallbackData{
-		Command: command,
-		Args:    stringArgs,
-	}
+	return CallbackData{Command: command, Args: stringArgs}
 }
 
 // All To* encoders return an empty string when serialization fails. Telegram
@@ -369,3 +452,18 @@ func (d CallbackData) Encode(t BotPayloadType) string {
 	}
 	return ""
 }
+
+// EncodeValidated serializes callback data and enforces Telegram's 1-64 byte limit.
+func (d CallbackData) EncodeValidated(t BotPayloadType) (string, error) {
+	encoded := d.Encode(t)
+	if encoded == "" {
+		if t != BotPayloadBase64 && t != BotPayloadJSON && t != BotPayloadCompact && t != BotPayloadCompactBase64 {
+			return "", ErrInvalidPayloadType
+		}
+		return "", ErrCallbackDataLength
+	}
+	if length := len([]byte(encoded)); length > 64 {
+		return "", fmt.Errorf("%w: got %d", ErrCallbackDataLength, length)
+	}
+	return encoded, nil
+}

keyboard_test.go

@@ -73,6 +73,35 @@ func TestInlineKeyboardButtonBuilderSetCallbackDataUsesConfiguredPayloadType(t *
 	}
 }
 
+func TestInlineKeyboardButtonBuilderKeepsExactlyOneAction(t *testing.T) {
+	callback := NewInlineKeyboardButton("Action").
+		SetURL("https://example.test").
+		SetCallbackDataJSON("confirm").
+		build()
+	if callback.URL != "" || callback.CallbackData == "" {
+		t.Fatalf("callback action was not exclusive: %#v", callback)
+	}
+
+	link := NewInlineKeyboardButton("Action").
+		SetCallbackDataJSON("confirm").
+		SetURL("https://example.test").
+		build()
+	if link.URL == "" || link.CallbackData != "" {
+		t.Fatalf("URL action was not exclusive: %#v", link)
+	}
+}
+
+func TestInlineKeyboardGetReturnsIndependentMarkup(t *testing.T) {
+	keyboard := NewInlineKeyboardJSON(1).AddURLButton("Docs", "https://example.test")
+	first := keyboard.Get()
+	first.InlineKeyboard[0][0].Text = "mutated"
+
+	second := keyboard.Get()
+	if got := second.InlineKeyboard[0][0].Text; got != "Docs" {
+		t.Fatalf("Get exposed builder state for mutation: got %q", got)
+	}
+}
+
 func TestInlineKeyboardGetPayloadTypeReturnsLocalOverride(t *testing.T) {
 	kb := NewInlineKeyboardJSON(2)
 	if got := kb.GetPayloadType(); got != BotPayloadJSON {
@@ -223,3 +252,60 @@ func TestDecodePayloadStrictRejectsMismatchedType(t *testing.T) {
 		t.Fatalf("expected ErrPayloadTypeMismatch, got %v", err)
 	}
 }
+
+func TestInlineKeyboardValidation(t *testing.T) {
+	if err := NewInlineKeyboardButton("missing action").Validate(); !errors.Is(err, ErrInlineKeyboardButtonAction) {
+		t.Fatalf("expected ErrInlineKeyboardButtonAction, got %v", err)
+	}
+
+	long := strings.Repeat("я", 33)
+	button := NewInlineKeyboardButton("long").SetCallbackDataCompact(long)
+	if err := button.Validate(); !errors.Is(err, ErrCallbackDataLength) {
+		t.Fatalf("expected ErrCallbackDataLength, got %v", err)
+	}
+
+	keyboard := NewInlineKeyboardCompact(1).AddButton(button)
+	if _, err := keyboard.GetValidated(); !errors.Is(err, ErrCallbackDataLength) {
+		t.Fatalf("expected validated keyboard to reject callback data, got %v", err)
+	}
+}
+
+func TestCallbackDataEncodeValidatedBoundaries(t *testing.T) {
+	tests := []struct {
+		name    string
+		command string
+		wantLen int
+		wantErr error
+	}{
+		{name: "one byte", command: "", wantLen: 1},
+		{name: "64 bytes", command: strings.Repeat("a", 63), wantLen: 64},
+		{name: "65 bytes", command: strings.Repeat("a", 64), wantErr: ErrCallbackDataLength},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			encoded, err := (CallbackData{Command: tt.command}).EncodeValidated(BotPayloadCompact)
+			if !errors.Is(err, tt.wantErr) {
+				t.Fatalf("expected %v, got %v", tt.wantErr, err)
+			}
+			if err == nil && len([]byte(encoded)) != tt.wantLen {
+				t.Fatalf("encoded length = %d, want %d", len([]byte(encoded)), tt.wantLen)
+			}
+		})
+	}
+	if _, err := (CallbackData{Command: "ok"}).EncodeValidated(BotPayloadType("unknown")); !errors.Is(err, ErrInvalidPayloadType) {
+		t.Fatalf("expected ErrInvalidPayloadType, got %v", err)
+	}
+}
+
+func TestInlineKeyboardLoweredMaxRowStillWraps(t *testing.T) {
+	keyboard := NewInlineKeyboardJSON(3).
+		AddURLButton("A", "https://example.test/a").
+		AddURLButton("B", "https://example.test/b").
+		SetMaxRow(1).
+		AddURLButton("C", "https://example.test/c")
+
+	markup := keyboard.Get()
+	if len(markup.InlineKeyboard) != 2 || len(markup.InlineKeyboard[0]) != 2 || len(markup.InlineKeyboard[1]) != 1 {
+		t.Fatalf("lowered maxRow stopped automatic wrapping: %#v", markup.InlineKeyboard)
+	}
+}

l10n.go

@@ -1,6 +1,9 @@
 package laniakea
 
-import "sync"
+import (
+	"maps"
+	"sync"
+)
 
 // DictEntry maps language codes to translated strings.
 type DictEntry map[string]string
@@ -64,8 +67,6 @@ func cloneDictEntry(src DictEntry) DictEntry {
 		return nil
 	}
 	cloned := make(DictEntry, len(src))
-	for lang, text := range src {
-		cloned[lang] = text
-	}
+	maps.Copy(cloned, src)
 	return cloned
 }

msg_context.go

@@ -8,9 +8,9 @@ import (
 	"reflect"
 	"strconv"
 	"strings"
-	"time"
 
 	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
+	"git.scuroneko.dev/scuroneko/laniakea/tgrich"
 	"git.scuroneko.dev/scuroneko/sneklog/v2"
 )
 
@@ -31,7 +31,9 @@ import (
 // reply helpers need Msg, while inline callback edit helpers can work through
 // InlineMsgID when there is no chat message.
 type MessageContext struct {
-	API    *tgapi.API
+	// API is the Telegram API client used by context helpers.
+	API *tgapi.API
+	// Update is the Telegram update being handled.
 	Update tgapi.Update
 
 	// Msg is the normalized Telegram message for message-backed update kinds.
@@ -81,42 +83,60 @@ type MessageContext struct {
 	payloadType   BotPayloadType
 	sceneRuntime  sceneRuntime
 	observer      Observer
+	eventEmitter  func(context.Context, Event)
+	asyncTask     func(func())
 	botID         int64
 
 	ctx context.Context
 }
 
-// AnswerMessage represents a message sent or edited via MessageContext.
-// It holds metadata to allow further editing or deletion.
-type AnswerMessage struct {
-	MessageID int
-	Text      string
-	IsMedia   bool
-	ctx       *MessageContext // internal back-reference
-}
-
-func (ctx *MessageContext) edit(messageID int, text string, keyboard *InlineKeyboard, parseMode tgapi.ParseMode) *AnswerMessage {
-	if err := validateMessageText(text); err != nil {
-		ctx.Logger.Errorln(err)
-		return nil
-	}
-	params := tgapi.EditMessageText{
-		Text:      text,
-		ParseMode: parseMode,
-	}
+func (ctx *MessageContext) buildEditMessageTextParams(messageID int, keyboard *InlineKeyboard, parseMode tgapi.ParseMode) (tgapi.EditMessageText, error) {
+	params := tgapi.EditMessageText{}
 	switch {
-	case messageID > 0 && ctx.Msg != nil:
+	case messageID > 0 && ctx.Msg != nil && ctx.Msg.Chat != nil:
 		params.MessageID = messageID
 		params.ChatID = ctx.Msg.Chat.ID
+		params.BusinessConnectionID = ctx.Msg.BusinessConnectionID
 	case ctx.InlineMsgID != "":
 		params.InlineMessageID = ctx.InlineMsgID
 	default:
-		ctx.Logger.Errorln(ErrEditTargetMissing)
-		return nil
+		return params, ErrEditTargetMissing
+	}
+	if parseMode != "" {
+		params.ParseMode = parseMode
 	}
 	if keyboard != nil {
 		params.ReplyMarkup = keyboard.Get()
 	}
+	return params, nil
+}
+
+// AnswerMessage represents a message sent or edited via MessageContext.
+// It holds metadata to allow further editing or deletion.
+type AnswerMessage struct {
+	// MessageID identifies the sent Telegram message.
+	MessageID int
+	// Text contains the text or caption sent with the message.
+	// For rich messages, it contains rendered HTML for v1 compatibility.
+	Text string
+	// RichHTML contains the rendered HTML of a rich message.
+	RichHTML string // Since: Bot API 10.2
+	// IsMedia reports whether the answer contains media.
+	IsMedia bool
+	ctx     *MessageContext // internal back-reference
+}
+
+func (ctx *MessageContext) edit(messageID int, text string, keyboard *InlineKeyboard, parseMode tgapi.ParseMode) *AnswerMessage {
+	params, err := ctx.buildEditMessageTextParams(messageID, keyboard, parseMode)
+	if err != nil {
+		ctx.Logger.Errorln(err)
+		return nil
+	}
+	if err := validateMessageText(text); err != nil {
+		ctx.Logger.Errorln(err)
+		return nil
+	}
+	params.Text = text
 	msg, _, err := ctx.API.EditMessageTextWithContext(ctx.Context(), params)
 	if err != nil {
 		ctx.Logger.Errorln(err)
@@ -187,9 +207,10 @@ func (ctx *MessageContext) editPhotoText(messageID int, text string, kb *InlineK
 		ParseMode: parseMode,
 	}
 	switch {
-	case messageID > 0 && ctx.Msg != nil:
+	case messageID > 0 && ctx.Msg != nil && ctx.Msg.Chat != nil:
 		params.ChatID = ctx.Msg.Chat.ID
 		params.MessageID = messageID
+		params.BusinessConnectionID = ctx.Msg.BusinessConnectionID
 	case ctx.InlineMsgID != "":
 		params.InlineMessageID = ctx.InlineMsgID
 	default:
@@ -239,7 +260,7 @@ func (m *AnswerMessage) EditCaptionKeyboardMarkdown(text string, kb *InlineKeybo
 }
 
 func (ctx *MessageContext) answer(text string, keyboard *InlineKeyboard, parseMode tgapi.ParseMode) *AnswerMessage {
-	if ctx.Msg == nil {
+	if ctx.Msg == nil || ctx.Msg.Chat == nil {
 		ctx.Logger.Errorln(ErrMessageContextNil)
 		return nil
 	}
@@ -248,9 +269,10 @@ func (ctx *MessageContext) answer(text string, keyboard *InlineKeyboard, parseMo
 		return nil
 	}
 	params := tgapi.SendMessage{
-		ChatID:    ctx.Msg.Chat.ID,
-		Text:      text,
-		ParseMode: parseMode,
+		BusinessConnectionID: ctx.Msg.BusinessConnectionID,
+		ChatID:               ctx.Msg.Chat.ID,
+		Text:                 text,
+		ParseMode:            parseMode,
 	}
 	if keyboard != nil {
 		params.ReplyMarkup = keyboard.Get()
@@ -333,7 +355,7 @@ func (ctx *MessageContext) answerLong(text string, keyboard *InlineKeyboard, par
 		ctx.Logger.Errorln(ErrMessageSplitImpossible)
 		return nil
 	}
-	if ctx.Msg == nil {
+	if ctx.Msg == nil || ctx.Msg.Chat == nil {
 		ctx.Logger.Errorln(ErrMessageContextNil)
 		return nil
 	}
@@ -368,7 +390,7 @@ func (ctx *MessageContext) answerLong(text string, keyboard *InlineKeyboard, par
 }
 
 func (ctx *MessageContext) answerPhoto(photoID, text string, kb *InlineKeyboard, parseMode tgapi.ParseMode) *AnswerMessage {
-	if ctx.Msg == nil {
+	if ctx.Msg == nil || ctx.Msg.Chat == nil {
 		ctx.Logger.Errorln(ErrMessageContextNil)
 		return nil
 	}
@@ -377,10 +399,11 @@ func (ctx *MessageContext) answerPhoto(photoID, text string, kb *InlineKeyboard,
 		return nil
 	}
 	params := tgapi.SendPhoto{
-		ChatID:    ctx.Msg.Chat.ID,
-		Caption:   text,
-		ParseMode: parseMode,
-		Photo:     photoID,
+		BusinessConnectionID: ctx.Msg.BusinessConnectionID,
+		ChatID:               ctx.Msg.Chat.ID,
+		Caption:              text,
+		ParseMode:            parseMode,
+		Photo:                photoID,
 	}
 	if kb != nil {
 		params.ReplyMarkup = kb.Get()
@@ -443,7 +466,7 @@ func (ctx *MessageContext) delete(messageID int) {
 		ctx.Logger.Errorln(ErrMessageIDZero)
 		return
 	}
-	if ctx.Msg == nil {
+	if ctx.Msg == nil || ctx.Msg.Chat == nil {
 		ctx.Logger.Errorln(ErrMessageContextNil)
 		return
 	}
@@ -495,12 +518,14 @@ func (ctx *MessageContext) AnswerCallbackURL(u string) { ctx.answerCallbackQuery
 
 // SendAction sends a chat action (typing, uploading_photo, etc.) to indicate bot activity.
 func (ctx *MessageContext) SendAction(action tgapi.ChatActionType) {
-	if ctx.Msg == nil {
+	if ctx.Msg == nil || ctx.Msg.Chat == nil {
 		ctx.Logger.Errorln(ErrMessageContextNil)
 		return
 	}
 	params := tgapi.SendChatAction{
-		ChatID: ctx.Msg.Chat.ID, Action: action,
+		BusinessConnectionID: ctx.Msg.BusinessConnectionID,
+		ChatID:               ctx.Msg.Chat.ID,
+		Action:               action,
 	}
 	if ctx.Msg.MessageThreadID > 0 {
 		params.MessageThreadID = ctx.Msg.MessageThreadID
@@ -537,7 +562,7 @@ func (ctx *MessageContext) error(err error) {
 func (ctx *MessageContext) Error(err error) { ctx.error(err) }
 
 func (ctx *MessageContext) newDraft(parseMode tgapi.ParseMode) *Draft {
-	if ctx.Msg == nil {
+	if ctx.Msg == nil || ctx.Msg.Chat == nil {
 		ctx.Logger.Errorln(ErrMessageContextNil)
 		return nil
 	}
@@ -550,28 +575,19 @@ func (ctx *MessageContext) newDraft(parseMode tgapi.ParseMode) *Draft {
 		return nil
 	}
 
-	if ctx.API.Limiter != nil {
-		c, cancel := context.WithTimeout(ctx.Context(), 5*time.Second)
-		defer cancel()
-		if err := ctx.API.Limiter.Wait(c, ctx.Msg.Chat.ID); err != nil {
-			ctx.Logger.Errorln(err)
-			return nil
-		}
-	}
-
 	draft := ctx.draftProvider.NewDraft(parseMode).SetChat(ctx.Msg.Chat.ID, ctx.Msg.MessageThreadID)
 	return draft
 }
 
 // NewDraft creates a new message draft associated with the current chat.
-// Uses the API limiter to avoid rate limiting.
+// Draft sends are rate-limited by the API client.
 func (ctx *MessageContext) NewDraft() *Draft {
 	return ctx.newDraft(tgapi.ParseNone)
 }
 
 // NewDraftMarkdown creates a new message draft associated with the current chat,
 // with Markdown V2 parse mode enabled.
-// Uses the API limiter to avoid rate limiting.
+// Draft sends are rate-limited by the API client.
 func (ctx *MessageContext) NewDraftMarkdown() *Draft {
 	return ctx.newDraft(tgapi.ParseMarkdownV2)
 }
@@ -640,19 +656,19 @@ func bindPositional(args []string, dst any) error {
 		case reflect.String:
 			field.SetString(raw)
 		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-			n, err := strconv.ParseInt(raw, 10, 64)
+			n, err := strconv.ParseInt(raw, 10, field.Type().Bits())
 			if err != nil {
 				return fmt.Errorf("%w: field %s: %v", ErrBindArgsConversion, fieldType.Name, err)
 			}
 			field.SetInt(n)
 		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
-			n, err := strconv.ParseUint(raw, 10, 64)
+			n, err := strconv.ParseUint(raw, 10, field.Type().Bits())
 			if err != nil {
 				return fmt.Errorf("%w: field %s: %v", ErrBindArgsConversion, fieldType.Name, err)
 			}
 			field.SetUint(n)
 		case reflect.Float32, reflect.Float64:
-			f, err := strconv.ParseFloat(raw, 64)
+			f, err := strconv.ParseFloat(raw, field.Type().Bits())
 			if err != nil {
 				return fmt.Errorf("%w: field %s: %v", ErrBindArgsConversion, fieldType.Name, err)
 			}
@@ -695,7 +711,14 @@ func (ctx *MessageContext) Context() context.Context {
 }
 
 func (ctx *MessageContext) emitPolicyChecked(event PolicyCheckedEvent) {
-	if ctx == nil || ctx.observer == nil {
+	if ctx == nil {
+		return
+	}
+	if ctx.eventEmitter != nil {
+		ctx.eventEmitter(ctx.Context(), event)
+		return
+	}
+	if ctx.observer == nil {
 		return
 	}
 	defer func() {
@@ -821,3 +844,143 @@ func (ctx *MessageContext) UpsertKeyboard(text string, keyboard *InlineKeyboard)
 func (ctx *MessageContext) UpsertKeyboardMarkdown(text string, keyboard *InlineKeyboard) *AnswerMessage {
 	return ctx.upsertKeyboard(text, keyboard, tgapi.ParseMarkdownV2)
 }
+
+func (ctx *MessageContext) richAnswer(rich tgapi.InputRichMessage, keyboard *InlineKeyboard) *AnswerMessage {
+	if ctx.Msg == nil || ctx.Msg.Chat == nil {
+		ctx.Logger.Errorln(ErrMessageContextNil)
+		return nil
+	}
+	params := tgapi.SendRichMessage{
+		ChatID:      ctx.Msg.Chat.ID,
+		RichMessage: rich,
+	}
+	if keyboard != nil {
+		params.ReplyMarkup = keyboard.Get()
+	}
+	if ctx.Msg.MessageThreadID > 0 {
+		params.MessageThreadID = int64(ctx.Msg.MessageThreadID)
+	}
+	if ctx.Msg.DirectMessageTopic != nil {
+		params.DirectMessagesTopicID = ctx.Msg.DirectMessageTopic.TopicID
+	}
+	if ctx.Msg.BusinessConnectionID != "" {
+		params.BusinessConnectionID = ctx.Msg.BusinessConnectionID
+	}
+
+	msg, err := ctx.API.SendRichMessageWithContext(ctx.Context(), params)
+	if err != nil {
+		ctx.Logger.Errorln(err)
+		return nil
+	}
+	return &AnswerMessage{
+		MessageID: msg.MessageID,
+		Text:      rich.HTML,
+		RichHTML:  rich.HTML,
+		IsMedia:   false,
+		ctx:       ctx,
+	}
+}
+
+func (ctx *MessageContext) richBlocksAnswer(keyboard *InlineKeyboard, blocks ...tgapi.InputRichBlock) *AnswerMessage {
+	rich, err := tgrich.BuildHTML(blocks...)
+	if err != nil {
+		ctx.Logger.Errorln(err)
+		return nil
+	}
+	return ctx.richAnswer(rich, keyboard)
+}
+
+// RichAnswer builds and sends input rich-message blocks.
+//
+// Since: Bot API 10.2
+func (ctx *MessageContext) RichAnswer(blocks ...tgapi.InputRichBlock) *AnswerMessage {
+	return ctx.richBlocksAnswer(nil, blocks...)
+}
+
+// RichAnswerKeyboard builds and sends input rich-message blocks with an inline keyboard.
+//
+// Since: Bot API 10.2
+func (ctx *MessageContext) RichAnswerKeyboard(keyboard *InlineKeyboard, blocks ...tgapi.InputRichBlock) *AnswerMessage {
+	return ctx.richBlocksAnswer(keyboard, blocks...)
+}
+
+func (ctx *MessageContext) editRich(messageID int, keyboard *InlineKeyboard, blocks ...tgapi.InputRichBlock) *AnswerMessage {
+	params, err := ctx.buildEditMessageTextParams(messageID, keyboard, "")
+	if err != nil {
+		ctx.Logger.Errorln(err)
+		return nil
+	}
+	rich, err := tgrich.BuildHTML(blocks...)
+	if err != nil {
+		ctx.Logger.Errorln(err)
+		return nil
+	}
+	params.RichMessage = &rich
+	msg, _, err := ctx.API.EditMessageTextWithContext(ctx.Context(), params)
+	if err != nil {
+		ctx.Logger.Errorln(err)
+		return nil
+	}
+	resultMessageID := messageID
+	if msg.MessageID > 0 {
+		resultMessageID = msg.MessageID
+	}
+	return &AnswerMessage{
+		MessageID: resultMessageID, Text: rich.HTML, RichHTML: rich.HTML, IsMedia: false, ctx: ctx,
+	}
+}
+func (ctx *MessageContext) editRichCallback(keyboard *InlineKeyboard, blocks ...tgapi.InputRichBlock) *AnswerMessage {
+	if ctx.CallbackMsgID == 0 && ctx.InlineMsgID == "" {
+		ctx.Logger.Errorln(ErrCallbackMessageMissing)
+		return nil
+	}
+	return ctx.editRich(ctx.CallbackMsgID, keyboard, blocks...)
+}
+func (ctx *MessageContext) upsertRichKeyboard(keyboard *InlineKeyboard, blocks ...tgapi.InputRichBlock) *AnswerMessage {
+	if ctx.IsCallback() {
+		if ctx.HasPhoto() {
+			rich, err := tgrich.BuildHTML(blocks...)
+			if err != nil {
+				ctx.Logger.Errorln(err)
+				return nil
+			}
+			ctx.CallbackDelete()
+			return ctx.richAnswer(rich, keyboard)
+		}
+		return ctx.editRichCallback(keyboard, blocks...)
+	}
+	return ctx.richBlocksAnswer(keyboard, blocks...)
+}
+
+// EditCallbackRich builds rich blocks and replaces the callback message content and inline keyboard.
+// It doesn't upload local files referenced with attach://.
+//
+// Since: Bot API 10.2
+func (ctx *MessageContext) EditCallbackRich(keyboard *InlineKeyboard, blocks ...tgapi.InputRichBlock) *AnswerMessage {
+	return ctx.editRichCallback(keyboard, blocks...)
+}
+
+// UpsertKeyboardRich builds rich blocks and either edits the callback message or sends a new message.
+// Photo callback messages are replaced because their text content can't be edited directly.
+// It doesn't upload local files referenced with attach://.
+//
+// Since: Bot API 10.2
+func (ctx *MessageContext) UpsertKeyboardRich(keyboard *InlineKeyboard, blocks ...tgapi.InputRichBlock) *AnswerMessage {
+	return ctx.upsertRichKeyboard(keyboard, blocks...)
+}
+
+// EditRich builds rich blocks and replaces the message content without changing its inline keyboard.
+// It doesn't upload local files referenced with attach://.
+//
+// Since: Bot API 10.2
+func (m *AnswerMessage) EditRich(blocks ...tgapi.InputRichBlock) *AnswerMessage {
+	return m.ctx.editRich(m.MessageID, nil, blocks...)
+}
+
+// EditRichKeyboard builds rich blocks and replaces the message content and inline keyboard.
+// It doesn't upload local files referenced with attach://.
+//
+// Since: Bot API 10.2
+func (m *AnswerMessage) EditRichKeyboard(keyboard *InlineKeyboard, blocks ...tgapi.InputRichBlock) *AnswerMessage {
+	return m.ctx.editRich(m.MessageID, keyboard, blocks...)
+}

msg_context_test.go

@@ -10,9 +10,353 @@ import (
 	"testing"
 
 	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
+	"git.scuroneko.dev/scuroneko/laniakea/tgrich"
 	"git.scuroneko.dev/scuroneko/sneklog/v2"
 )
 
+func newMessageContextTestAPI(t *testing.T, transport roundTripFunc) *tgapi.API {
+	t.Helper()
+	api := tgapi.NewAPI(
+		tgapi.NewAPIOpts("token").
+			SetAPIURL("https://example.test").
+			SetHTTPClient(&http.Client{Transport: transport}),
+	)
+	t.Cleanup(func() {
+		if err := api.Close(); err != nil {
+			t.Fatalf("Close returned error: %v", err)
+		}
+	})
+	return api
+}
+
+func readMessageContextRequest(t *testing.T, req *http.Request) map[string]any {
+	t.Helper()
+	body, err := io.ReadAll(req.Body)
+	if err != nil {
+		t.Fatalf("failed to read request body: %v", err)
+	}
+	var decoded map[string]any
+	if err := json.Unmarshal(body, &decoded); err != nil {
+		t.Fatalf("failed to decode request body: %v", err)
+	}
+	return decoded
+}
+
+func messageContextResponse(result string) *http.Response {
+	return &http.Response{
+		StatusCode: http.StatusOK,
+		Header:     http.Header{"Content-Type": []string{"application/json"}},
+		Body:       io.NopCloser(strings.NewReader(`{"ok":true,"result":` + result + `}`)),
+	}
+}
+
+func TestMessageContextPropagatesBusinessConnection(t *testing.T) {
+	tests := []struct {
+		name       string
+		wantMethod string
+		result     string
+		invoke     func(*MessageContext)
+	}{
+		{name: "send message", wantMethod: "sendMessage", result: `{"message_id":11,"date":1}`, invoke: func(ctx *MessageContext) { ctx.Answer("text") }},
+		{name: "send photo", wantMethod: "sendPhoto", result: `{"message_id":11,"date":1}`, invoke: func(ctx *MessageContext) { ctx.AnswerPhoto("photo-id", "caption") }},
+		{name: "edit caption", wantMethod: "editMessageCaption", result: `{"message_id":11,"date":1}`, invoke: func(ctx *MessageContext) { (&AnswerMessage{MessageID: 7, ctx: ctx}).EditCaption("caption") }},
+		{name: "send action", wantMethod: "sendChatAction", result: `true`, invoke: func(ctx *MessageContext) { ctx.SendAction(tgapi.ChatActionTyping) }},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var gotBody map[string]any
+			api := newMessageContextTestAPI(t, roundTripFunc(func(req *http.Request) (*http.Response, error) {
+				if !strings.HasSuffix(req.URL.Path, "/"+tt.wantMethod) {
+					t.Fatalf("request path = %q, want method %q", req.URL.Path, tt.wantMethod)
+				}
+				gotBody = readMessageContextRequest(t, req)
+				return messageContextResponse(tt.result), nil
+			}))
+			ctx := &MessageContext{
+				API: api,
+				Msg: &tgapi.Message{
+					BusinessConnectionID: "business-1",
+					Chat:                 &tgapi.Chat{ID: 42, Type: tgapi.ChatTypePrivate},
+				},
+				Logger: sneklog.NewLogger(),
+			}
+
+			tt.invoke(ctx)
+			if got := gotBody["business_connection_id"]; got != "business-1" {
+				t.Fatalf("business_connection_id = %v, want business-1", got)
+			}
+		})
+	}
+}
+
+func TestMessageContextHelpersRejectMissingChat(t *testing.T) {
+	requests := 0
+	api := newMessageContextTestAPI(t, roundTripFunc(func(req *http.Request) (*http.Response, error) {
+		requests++
+		return nil, errors.New("unexpected request")
+	}))
+	ctx := &MessageContext{API: api, Msg: &tgapi.Message{}, CallbackMsgID: 7, Logger: sneklog.NewLogger()}
+
+	if answer := ctx.Answer("text"); answer != nil {
+		t.Fatalf("Answer returned %#v for a message without a chat", answer)
+	}
+	if answer := ctx.EditCallback("text", nil); answer != nil {
+		t.Fatalf("EditCallback returned %#v for a message without a chat", answer)
+	}
+	if requests != 0 {
+		t.Fatalf("missing-chat helpers made %d requests", requests)
+	}
+}
+
+func TestRichAnswerBuildsInputBlocks(t *testing.T) {
+	var gotBody map[string]any
+	client := &http.Client{Transport: roundTripFunc(func(req *http.Request) (*http.Response, error) {
+		body, err := io.ReadAll(req.Body)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if err := json.Unmarshal(body, &gotBody); err != nil {
+			t.Fatal(err)
+		}
+		return &http.Response{
+			StatusCode: http.StatusOK,
+			Header:     http.Header{"Content-Type": []string{"application/json"}},
+			Body:       io.NopCloser(strings.NewReader(`{"ok":true,"result":{"message_id":9,"date":1}}`)),
+		}, nil
+	})}
+	api := tgapi.NewAPI(tgapi.NewAPIOpts("token").SetAPIURL("https://example.test").SetHTTPClient(client))
+	defer func() { _ = api.Close() }()
+	ctx := &MessageContext{
+		API: api,
+		Msg: &tgapi.Message{
+			BusinessConnectionID: "business-1",
+			Chat:                 &tgapi.Chat{ID: 42, Type: tgapi.ChatTypePrivate},
+		},
+		Logger: sneklog.NewLogger(),
+	}
+
+	answer := ctx.RichAnswer(tgrich.P(tgrich.Bold(tgrich.Text("ready"))))
+	if answer == nil {
+		t.Fatal("RichAnswer() returned nil")
+	}
+	rich, ok := gotBody["rich_message"].(map[string]any)
+	if !ok || rich["html"] != "<p><b>ready</b></p>" {
+		t.Fatalf("rich_message = %#v", gotBody["rich_message"])
+	}
+	if _, exists := rich["skip_entity_detection"]; exists {
+		t.Fatalf("rich_message unexpectedly disables entity detection: %#v", rich)
+	}
+	if got := gotBody["business_connection_id"]; got != "business-1" {
+		t.Fatalf("business_connection_id = %v, want business-1", got)
+	}
+	if answer.Text != "<p><b>ready</b></p>" || answer.RichHTML != answer.Text {
+		t.Fatalf("unexpected answer content: Text=%q RichHTML=%q", answer.Text, answer.RichHTML)
+	}
+}
+
+func TestRichAnswerRejectsInvalidBlocksWithoutRequest(t *testing.T) {
+	client := &http.Client{Transport: roundTripFunc(func(req *http.Request) (*http.Response, error) {
+		t.Fatal("unexpected HTTP request")
+		return nil, nil
+	})}
+	api := tgapi.NewAPI(tgapi.NewAPIOpts("token").SetAPIURL("https://example.test").SetHTTPClient(client))
+	defer func() { _ = api.Close() }()
+	ctx := &MessageContext{
+		API:    api,
+		Msg:    &tgapi.Message{Chat: &tgapi.Chat{ID: 42, Type: tgapi.ChatTypePrivate}},
+		Logger: sneklog.NewLogger(),
+	}
+
+	if answer := ctx.RichAnswer(tgrich.H(tgrich.Text("invalid"), 0)); answer != nil {
+		t.Fatal("RichAnswer() returned an answer for an invalid heading")
+	}
+}
+
+func TestAnswerMessageEditRich(t *testing.T) {
+	tests := []struct {
+		name         string
+		withKeyboard bool
+	}{
+		{name: "content only"},
+		{name: "content and keyboard", withKeyboard: true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var gotPath string
+			var gotBody map[string]any
+			api := newMessageContextTestAPI(t, roundTripFunc(func(req *http.Request) (*http.Response, error) {
+				gotPath = req.URL.Path
+				gotBody = readMessageContextRequest(t, req)
+				return messageContextResponse(`{"message_id":11,"date":1}`), nil
+			}))
+			ctx := &MessageContext{
+				API: api,
+				Msg: &tgapi.Message{
+					BusinessConnectionID: "business-1",
+					Chat:                 &tgapi.Chat{ID: 42, Type: tgapi.ChatTypePrivate},
+				},
+				Logger: sneklog.NewLogger(),
+			}
+			original := &AnswerMessage{MessageID: 7, ctx: ctx}
+			block := tgrich.P(tgrich.Bold(tgrich.Text("updated")))
+
+			var answer *AnswerMessage
+			if tt.withKeyboard {
+				kb := NewInlineKeyboardJSON(1).AddCallbackButton("A", "cmd")
+				answer = original.EditRichKeyboard(kb, block)
+			} else {
+				answer = original.EditRich(block)
+			}
+
+			if answer == nil {
+				t.Fatal("rich edit returned nil")
+			}
+			if gotPath != "/bottoken/editMessageText" {
+				t.Fatalf("unexpected request path: %s", gotPath)
+			}
+			if got := gotBody["chat_id"]; got != float64(42) {
+				t.Fatalf("chat_id = %v, want 42", got)
+			}
+			if got := gotBody["message_id"]; got != float64(7) {
+				t.Fatalf("message_id = %v, want 7", got)
+			}
+			if got := gotBody["business_connection_id"]; got != "business-1" {
+				t.Fatalf("business_connection_id = %v, want business-1", got)
+			}
+			rich, ok := gotBody["rich_message"].(map[string]any)
+			if !ok || rich["html"] != "<p><b>updated</b></p>" {
+				t.Fatalf("rich_message = %#v", gotBody["rich_message"])
+			}
+			if _, exists := gotBody["text"]; exists {
+				t.Fatalf("edit request unexpectedly contains text: %#v", gotBody)
+			}
+			_, hasKeyboard := gotBody["reply_markup"]
+			if hasKeyboard != tt.withKeyboard {
+				t.Fatalf("reply_markup presence = %v, want %v", hasKeyboard, tt.withKeyboard)
+			}
+			if answer.MessageID != 11 || answer.Text != "<p><b>updated</b></p>" || answer.RichHTML != answer.Text {
+				t.Fatalf("unexpected answer: %#v", answer)
+			}
+			if answer.ctx != ctx {
+				t.Fatal("edited answer lost its message context")
+			}
+		})
+	}
+}
+
+func TestEditCallbackRichEditsInlineMessage(t *testing.T) {
+	var gotBody map[string]any
+	api := newMessageContextTestAPI(t, roundTripFunc(func(req *http.Request) (*http.Response, error) {
+		gotBody = readMessageContextRequest(t, req)
+		return messageContextResponse("true"), nil
+	}))
+	ctx := &MessageContext{
+		API:         api,
+		InlineMsgID: "inline-1",
+		Logger:      sneklog.NewLogger(),
+	}
+	kb := NewInlineKeyboardJSON(1).AddCallbackButton("A", "cmd")
+
+	answer := ctx.EditCallbackRich(kb, tgrich.P(tgrich.Text("inline")))
+	if answer == nil {
+		t.Fatal("EditCallbackRich returned nil")
+	}
+	if got := gotBody["inline_message_id"]; got != "inline-1" {
+		t.Fatalf("inline_message_id = %v, want inline-1", got)
+	}
+	if _, exists := gotBody["chat_id"]; exists {
+		t.Fatalf("inline edit unexpectedly contains chat_id: %#v", gotBody)
+	}
+	if _, exists := gotBody["business_connection_id"]; exists {
+		t.Fatalf("inline edit unexpectedly contains business_connection_id: %#v", gotBody)
+	}
+	rich, ok := gotBody["rich_message"].(map[string]any)
+	if !ok || rich["html"] != "<p>inline</p>" {
+		t.Fatalf("rich_message = %#v", gotBody["rich_message"])
+	}
+	if _, exists := gotBody["reply_markup"]; !exists {
+		t.Fatal("inline rich edit has no reply_markup")
+	}
+	if answer.MessageID != 0 || answer.Text != "<p>inline</p>" || answer.RichHTML != answer.Text {
+		t.Fatalf("unexpected inline answer: %#v", answer)
+	}
+}
+
+func TestUpsertKeyboardRichValidatesPhotoBeforeDelete(t *testing.T) {
+	requests := 0
+	api := newMessageContextTestAPI(t, roundTripFunc(func(req *http.Request) (*http.Response, error) {
+		requests++
+		t.Fatalf("unexpected request to %s", req.URL.Path)
+		return nil, nil
+	}))
+	ctx := &MessageContext{
+		API:           api,
+		CallbackMsgID: 7,
+		Msg: &tgapi.Message{
+			Chat:  &tgapi.Chat{ID: 42, Type: tgapi.ChatTypePrivate},
+			Photo: []tgapi.PhotoSize{{FileID: "photo-1"}},
+		},
+		Logger: sneklog.NewLogger(),
+	}
+
+	answer := ctx.UpsertKeyboardRich(nil, tgrich.H(tgrich.Text("invalid"), 0))
+	if answer != nil {
+		t.Fatalf("UpsertKeyboardRich returned an answer for invalid blocks: %#v", answer)
+	}
+	if requests != 0 {
+		t.Fatalf("invalid photo upsert made %d requests", requests)
+	}
+}
+
+func TestUpsertKeyboardRichReplacesPhotoCallback(t *testing.T) {
+	var paths []string
+	var sendBody map[string]any
+	api := newMessageContextTestAPI(t, roundTripFunc(func(req *http.Request) (*http.Response, error) {
+		paths = append(paths, req.URL.Path)
+		switch req.URL.Path {
+		case "/bottoken/deleteMessage":
+			return messageContextResponse("true"), nil
+		case "/bottoken/sendRichMessage":
+			sendBody = readMessageContextRequest(t, req)
+			return messageContextResponse(`{"message_id":12,"date":1}`), nil
+		default:
+			t.Fatalf("unexpected request path: %s", req.URL.Path)
+			return nil, nil
+		}
+	}))
+	ctx := &MessageContext{
+		API:           api,
+		CallbackMsgID: 7,
+		Msg: &tgapi.Message{
+			Chat:  &tgapi.Chat{ID: 42, Type: tgapi.ChatTypePrivate},
+			Photo: []tgapi.PhotoSize{{FileID: "photo-1"}},
+		},
+		Logger: sneklog.NewLogger(),
+	}
+	kb := NewInlineKeyboardJSON(1).AddCallbackButton("A", "cmd")
+
+	answer := ctx.UpsertKeyboardRich(kb, tgrich.P(tgrich.Text("replacement")))
+	if answer == nil {
+		t.Fatal("UpsertKeyboardRich returned nil")
+	}
+	wantPaths := []string{"/bottoken/deleteMessage", "/bottoken/sendRichMessage"}
+	if !reflect.DeepEqual(paths, wantPaths) {
+		t.Fatalf("request paths = %#v, want %#v", paths, wantPaths)
+	}
+	rich, ok := sendBody["rich_message"].(map[string]any)
+	if !ok || rich["html"] != "<p>replacement</p>" {
+		t.Fatalf("rich_message = %#v", sendBody["rich_message"])
+	}
+	if _, exists := sendBody["reply_markup"]; !exists {
+		t.Fatal("replacement rich message has no reply_markup")
+	}
+	if answer.MessageID != 12 || answer.Text != "<p>replacement</p>" || answer.RichHTML != answer.Text {
+		t.Fatalf("unexpected replacement answer: %#v", answer)
+	}
+}
+
 func TestAnswerPhotoIncludesDirectMessagesTopicID(t *testing.T) {
 	var gotBody map[string]any
 
@@ -167,6 +511,29 @@ func TestBindArgsReportsConversionFailures(t *testing.T) {
 	}
 }
 
+func TestBindArgsRejectsNumericOverflow(t *testing.T) {
+	tests := []struct {
+		name string
+		arg  string
+		dst  any
+	}{
+		{name: "int8 positive", arg: "128", dst: &struct{ Value int8 }{}},
+		{name: "int8 negative", arg: "-129", dst: &struct{ Value int8 }{}},
+		{name: "uint8 positive", arg: "256", dst: &struct{ Value uint8 }{}},
+		{name: "uint8 negative", arg: "-1", dst: &struct{ Value uint8 }{}},
+		{name: "float32", arg: "3.5e39", dst: &struct{ Value float32 }{}},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctx := &MessageContext{Args: []string{tt.arg}}
+			if err := ctx.BindArgs(tt.dst); !errors.Is(err, ErrBindArgsConversion) {
+				t.Fatalf("expected ErrBindArgsConversion, got %v", err)
+			}
+		})
+	}
+}
+
 func TestBindArgsRejectsUnsupportedFieldTypes(t *testing.T) {
 	type input struct {
 		Tags []string

msg_handler.go

@@ -1,8 +1,10 @@
 package laniakea
 
 import (
+	"errors"
 	"strings"
 	"time"
+	"unicode"
 
 	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
 )
@@ -21,8 +23,9 @@ func (bot *Bot[T]) handleMessage(update *tgapi.Update, ctx *MessageContext) bool
 
 	if strings.Contains(cmd, "@") {
 		botUsername := bot.username
-		if botUsername != "" && strings.HasSuffix(cmd, "@"+botUsername) {
-			cmd = cmd[:len(cmd)-len("@"+botUsername)] // remove @botname
+		at := strings.LastIndexByte(cmd, '@')
+		if at > 0 && botUsername != "" && strings.EqualFold(cmd[at+1:], botUsername) {
+			cmd = cmd[:at] // remove @botname
 		}
 	}
 
@@ -52,6 +55,9 @@ func (bot *Bot[T]) handleMessage(update *tgapi.Update, ctx *MessageContext) bool
 			})
 
 			err := plugin.executeCmd(cmd, ctx, bot.appData)
+			if errors.Is(err, errMiddlewareBlocked) {
+				err = nil
+			}
 			handlerEndEvent := HandlerFinishedEvent{
 				UpdateID:    update.UpdateID,
 				UpdateType:  update.Type,
@@ -125,7 +131,7 @@ func (bot *Bot[T]) handleFallback(update *tgapi.Update, ctx *MessageContext) boo
 			FromID:      pluginCtx.FromID,
 			ChatID:      pluginCtx.ChatID,
 		})
-		err := plugin.messageFallback(pluginCtx, bot.appData)
+		err := callCommandExecutor(plugin.messageFallback, pluginCtx, bot.appData)
 		endEvent := HandlerFinishedEvent{
 			UpdateID:    update.UpdateID,
 			UpdateType:  update.Type,
@@ -227,6 +233,9 @@ func (bot *Bot[T]) handleCallback(update *tgapi.Update, ctx *MessageContext) boo
 			ChatID:      ctx.ChatID,
 		})
 		err := plugin.executePayload(data.Command, ctx, bot.appData)
+		if errors.Is(err, errMiddlewareBlocked) {
+			err = nil
+		}
 
 		endEvent := HandlerFinishedEvent{
 			UpdateID:    update.UpdateID,
@@ -282,7 +291,7 @@ func (bot *Bot[T]) checkPrefixes(text string) (string, bool) {
 func (bot *Bot[T]) parseCommand(text string) (prefix, cmd, args string) {
 	if prefix, hasPrefix := bot.checkPrefixes(text); hasPrefix {
 		text = strings.TrimSpace(text[len(prefix):])
-		spaceIndex := strings.Index(text, " ")
+		spaceIndex := strings.IndexFunc(text, unicode.IsSpace)
 		var cmd string
 		var args string
 		if spaceIndex == -1 {

observer.go

@@ -16,6 +16,8 @@ const (
 	HandlerCommandKind HandlerEventKind = "command"
 	// HandlerMessageKind identifies a message fallback handler.
 	HandlerMessageKind HandlerEventKind = "message"
+	// HandlerMiddlewareKind identifies middleware execution.
+	HandlerMiddlewareKind HandlerEventKind = "middleware"
 	// HandlerPayloadKind identifies a callback payload handler.
 	HandlerPayloadKind HandlerEventKind = "payload"
 	// HandlerUpdateKind identifies a generic update handler.
@@ -41,96 +43,174 @@ type Event interface {
 	isEvent()
 }
 
+func emitContextError(ctx *MessageContext, event ErrorEvent) {
+	if ctx == nil {
+		return
+	}
+	if ctx.Logger != nil {
+		ctx.Logger.Errorln(event.Err)
+	}
+	if ctx.eventEmitter != nil {
+		ctx.eventEmitter(ctx.Context(), event)
+		return
+	}
+	if ctx.observer == nil {
+		return
+	}
+	defer func() {
+		if recovered := recover(); recovered != nil && ctx.Logger != nil {
+			ctx.Logger.Errorln(fmt.Sprintf("panic in observer: %v", recovered))
+		}
+	}()
+	ctx.observer.OnError(ctx.Context(), event)
+}
+
 // UpdateReceivedEvent describes an update entering the bot runtime.
 type UpdateReceivedEvent struct {
-	UpdateID   int
+	// UpdateID identifies the Telegram update.
+	UpdateID int
+	// UpdateType identifies the normalized update kind.
 	UpdateType tgapi.UpdateType
-	FromID     int64
-	ChatID     int64
+	// FromID identifies the originating user when available.
+	FromID int64
+	// ChatID identifies the originating chat when available.
+	ChatID int64
 }
 
 // UpdateHandledEvent describes a completed update execution path.
 type UpdateHandledEvent struct {
-	UpdateID   int
+	// UpdateID identifies the Telegram update.
+	UpdateID int
+	// UpdateType identifies the normalized update kind.
 	UpdateType tgapi.UpdateType
-	FromID     int64
-	ChatID     int64
-	Duration   time.Duration
-	Handled    bool
+	// FromID identifies the originating user when available.
+	FromID int64
+	// ChatID identifies the originating chat when available.
+	ChatID int64
+	// Duration is the total framework handling time.
+	Duration time.Duration
+	// Handled reports whether a registered path handled the update.
+	Handled bool
 }
 
 // HandlerStartedEvent describes a handler about to execute.
 type HandlerStartedEvent struct {
-	UpdateID    int
-	UpdateType  tgapi.UpdateType
-	Plugin      string
+	// UpdateID identifies the Telegram update.
+	UpdateID int
+	// UpdateType identifies the normalized update kind.
+	UpdateType tgapi.UpdateType
+	// Plugin names the plugin that owns the handler.
+	Plugin string
+	// HandlerKind classifies the handler.
 	HandlerKind HandlerEventKind
+	// HandlerName identifies the handler within its plugin and kind.
 	HandlerName string
-	FromID      int64
-	ChatID      int64
+	// FromID identifies the originating user when available.
+	FromID int64
+	// ChatID identifies the originating chat when available.
+	ChatID int64
 }
 
 // HandlerFinishedEvent describes a handler that has completed.
 type HandlerFinishedEvent struct {
-	UpdateID    int
-	UpdateType  tgapi.UpdateType
-	Plugin      string
+	// UpdateID identifies the Telegram update.
+	UpdateID int
+	// UpdateType identifies the normalized update kind.
+	UpdateType tgapi.UpdateType
+	// Plugin names the plugin that owns the handler.
+	Plugin string
+	// HandlerKind classifies the handler.
 	HandlerKind HandlerEventKind
+	// HandlerName identifies the handler within its plugin and kind.
 	HandlerName string
-	FromID      int64
-	ChatID      int64
-	Duration    time.Duration
-	Err         error
-	UserFacing  bool
+	// FromID identifies the originating user when available.
+	FromID int64
+	// ChatID identifies the originating chat when available.
+	ChatID int64
+	// Duration is the handler execution time.
+	Duration time.Duration
+	// Err is the error returned or recovered from the handler.
+	Err error
+	// UserFacing reports whether Err is safe to show to the user.
+	UserFacing bool
 }
 
 // SceneTransitionEvent describes a scene state transition.
 type SceneTransitionEvent struct {
+	// Plugin names the plugin that owns the scene.
 	Plugin string
-	Scene  string
-	From   string
-	To     string
+	// Scene names the transitioning scene.
+	Scene string
+	// From is the previous scene step.
+	From string
+	// To is the resulting scene step.
+	To string
+	// Action identifies the requested state transition.
 	Action SceneAction
+	// FromID identifies the session user when available.
 	FromID int64
+	// ChatID identifies the session chat when available.
 	ChatID int64
 }
 
 // PolicyCheckedEvent describes the result of a policy evaluation.
 type PolicyCheckedEvent struct {
-	Name     string
-	Plugin   string
-	FromID   int64
-	ChatID   int64
-	Passed   bool
-	Err      error
+	// Name identifies the evaluated policy.
+	Name string
+	// Plugin names the plugin that requested the policy check.
+	Plugin string
+	// FromID identifies the evaluated user when available.
+	FromID int64
+	// ChatID identifies the evaluated chat when available.
+	ChatID int64
+	// Passed reports whether the policy accepted the context.
+	Passed bool
+	// Err is the policy evaluation error, if any.
+	Err error
+	// Internal reports whether evaluation failed internally rather than denying access.
 	Internal bool
 }
 
 // RunnerFinishedEvent describes a completed background runner execution.
 type RunnerFinishedEvent struct {
-	Name     string
+	// Name identifies the runner.
+	Name string
+	// Duration is the callback execution time.
 	Duration time.Duration
-	Err      error
+	// Err is the callback error or recovered panic.
+	Err error
 }
 
 // PollingRetryEvent describes a polling retry after a failed getUpdates call.
 type PollingRetryEvent struct {
+	// Attempt is the one-based retry number.
 	Attempt int
-	Delay   time.Duration
-	Err     error
+	// Delay is the time before the next polling attempt.
+	Delay time.Duration
+	// Err is the polling error that triggered the retry.
+	Err error
 }
 
 // ErrorEvent describes an error routed through framework error handling.
 type ErrorEvent struct {
-	UpdateID    int
-	UpdateType  tgapi.UpdateType
-	Plugin      string
+	// UpdateID identifies the Telegram update when available.
+	UpdateID int
+	// UpdateType identifies the normalized update kind when available.
+	UpdateType tgapi.UpdateType
+	// Plugin names the component that reported the error.
+	Plugin string
+	// HandlerKind classifies the failing handler or runtime component.
 	HandlerKind HandlerEventKind
+	// HandlerName identifies the failing handler within its kind.
 	HandlerName string
-	FromID      int64
-	ChatID      int64
-	Err         error
-	UserFacing  bool
+	// FromID identifies the originating user when available.
+	FromID int64
+	// ChatID identifies the originating chat when available.
+	ChatID int64
+	// Err is the reported error.
+	Err error
+	// UserFacing reports whether Err is safe to show to the user.
+	UserFacing bool
 }
 
 func (UpdateReceivedEvent) isEvent()  {}
@@ -144,6 +224,12 @@ func (PollingRetryEvent) isEvent()    {}
 func (ErrorEvent) isEvent()           {}
 
 // Observer receives best-effort runtime instrumentation events.
+//
+// During RunWithContext and RunWebhookWithContext, callbacks execute on a
+// dedicated dispatcher goroutine in enqueue order and never block update
+// handlers. The queue is bounded; overload drops events and emits sampled
+// warnings. Runtime shutdown cancels callback contexts and drains queued events;
+// Bot.Close returns ErrObserverShutdownTimeout if a callback ignores cancellation.
 type Observer interface {
 	OnUpdateReceived(ctx context.Context, event UpdateReceivedEvent)
 	OnUpdateHandled(ctx context.Context, event UpdateHandledEvent)
@@ -160,29 +246,43 @@ func (bot *Bot[T]) safeEmitEvent(ctx context.Context, event Event) {
 	if bot.observer == nil {
 		return
 	}
+	if bot.observerAsync != nil {
+		bot.observerAsync.enqueue(ctx, event)
+		return
+	}
 	defer func() {
 		if r := recover(); r != nil {
-			bot.logger.Errorln(fmt.Sprintf("panic in observer: %v", r))
+			if bot.logger != nil {
+				bot.logger.Errorln(fmt.Sprintf("panic in observer: %v", r))
+			}
 		}
 	}()
+	bot.emitEvent(ctx, event)
+}
+
+func (bot *Bot[T]) emitEvent(ctx context.Context, event Event) {
+	emitObserverEvent(bot.observer, ctx, event)
+}
+
+func emitObserverEvent(observer Observer, ctx context.Context, event Event) {
 	switch e := event.(type) {
 	case UpdateReceivedEvent:
-		bot.observer.OnUpdateReceived(ctx, e)
+		observer.OnUpdateReceived(ctx, e)
 	case UpdateHandledEvent:
-		bot.observer.OnUpdateHandled(ctx, e)
+		observer.OnUpdateHandled(ctx, e)
 	case HandlerStartedEvent:
-		bot.observer.OnHandlerStarted(ctx, e)
+		observer.OnHandlerStarted(ctx, e)
 	case HandlerFinishedEvent:
-		bot.observer.OnHandlerFinished(ctx, e)
+		observer.OnHandlerFinished(ctx, e)
 	case SceneTransitionEvent:
-		bot.observer.OnSceneTransition(ctx, e)
+		observer.OnSceneTransition(ctx, e)
 	case PolicyCheckedEvent:
-		bot.observer.OnPolicyChecked(ctx, e)
+		observer.OnPolicyChecked(ctx, e)
 	case RunnerFinishedEvent:
-		bot.observer.OnRunnerFinished(ctx, e)
+		observer.OnRunnerFinished(ctx, e)
 	case PollingRetryEvent:
-		bot.observer.OnPollingRetry(ctx, e)
+		observer.OnPollingRetry(ctx, e)
 	case ErrorEvent:
-		bot.observer.OnError(ctx, e)
+		observer.OnError(ctx, e)
 	}
 }

observer_async.go

@@ -0,0 +1,125 @@
+package laniakea
+
+import (
+	"context"
+	"fmt"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"git.scuroneko.dev/scuroneko/sneklog/v2"
+)
+
+const observerQueueSize = 1024
+
+type queuedObserverEvent struct {
+	ctx   context.Context
+	event Event
+}
+
+type observerDispatcher struct {
+	observer Observer
+	logger   *sneklog.Logger
+	ctx      context.Context
+	cancel   context.CancelFunc
+	queue    chan queuedObserverEvent
+	stop     chan struct{}
+	mu       sync.RWMutex
+	closed   bool
+	wg       sync.WaitGroup
+	stopOnce sync.Once
+	dropped  atomic.Uint64
+}
+
+func newObserverDispatcher(observer Observer, logger *sneklog.Logger) *observerDispatcher {
+	ctx, cancel := context.WithCancel(context.Background())
+	dispatcher := &observerDispatcher{
+		observer: observer,
+		logger:   logger,
+		ctx:      ctx,
+		cancel:   cancel,
+		queue:    make(chan queuedObserverEvent, observerQueueSize),
+		stop:     make(chan struct{}),
+	}
+	dispatcher.wg.Add(1)
+	go dispatcher.run()
+	return dispatcher
+}
+
+func (d *observerDispatcher) enqueue(ctx context.Context, event Event) {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	ctx = observerEventContext{Context: context.WithoutCancel(ctx), lifecycle: d.ctx}
+	d.mu.RLock()
+	defer d.mu.RUnlock()
+	if d.closed {
+		return
+	}
+	select {
+	case d.queue <- queuedObserverEvent{ctx: ctx, event: event}:
+	default:
+		dropped := d.dropped.Add(1)
+		if d.logger != nil && (dropped == 1 || dropped&(dropped-1) == 0) {
+			d.logger.Warnf("observer queue full; dropped %d events", dropped)
+		}
+	}
+}
+
+func (d *observerDispatcher) run() {
+	defer d.wg.Done()
+	for {
+		select {
+		case queued := <-d.queue:
+			d.dispatch(queued)
+		case <-d.stop:
+			for {
+				select {
+				case queued := <-d.queue:
+					d.dispatch(queued)
+				default:
+					return
+				}
+			}
+		}
+	}
+}
+
+func (d *observerDispatcher) dispatch(queued queuedObserverEvent) {
+	defer func() {
+		if recovered := recover(); recovered != nil && d.logger != nil {
+			d.logger.Errorln(fmt.Sprintf("panic in observer: %v", recovered))
+		}
+	}()
+	emitObserverEvent(d.observer, queued.ctx, queued.event)
+}
+
+func (d *observerDispatcher) close(ctx context.Context) error {
+	d.stopOnce.Do(func() {
+		d.mu.Lock()
+		d.closed = true
+		d.cancel()
+		close(d.stop)
+		d.mu.Unlock()
+	})
+	done := make(chan struct{})
+	go func() {
+		d.wg.Wait()
+		close(done)
+	}()
+	select {
+	case <-done:
+		return nil
+	case <-ctx.Done():
+		return fmt.Errorf("%w: %v", ErrObserverShutdownTimeout, ctx.Err())
+	}
+}
+
+type observerEventContext struct {
+	context.Context
+	lifecycle context.Context
+}
+
+func (ctx observerEventContext) Deadline() (time.Time, bool) { return ctx.lifecycle.Deadline() }
+func (ctx observerEventContext) Done() <-chan struct{}       { return ctx.lifecycle.Done() }
+func (ctx observerEventContext) Err() error                  { return ctx.lifecycle.Err() }

observer_async_test.go

@@ -0,0 +1,59 @@
+package laniakea
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+)
+
+type cancelAwareObserver struct {
+	testObserver
+	started chan struct{}
+}
+
+func (o *cancelAwareObserver) OnUpdateReceived(ctx context.Context, _ UpdateReceivedEvent) {
+	close(o.started)
+	<-ctx.Done()
+}
+
+type stubbornObserver struct {
+	testObserver
+	started chan struct{}
+	release chan struct{}
+}
+
+func (o *stubbornObserver) OnUpdateReceived(context.Context, UpdateReceivedEvent) {
+	close(o.started)
+	<-o.release
+}
+
+func TestObserverDispatcherCancelsCallbackDuringClose(t *testing.T) {
+	observer := &cancelAwareObserver{started: make(chan struct{})}
+	dispatcher := newObserverDispatcher(observer, nil)
+	dispatcher.enqueue(context.Background(), UpdateReceivedEvent{})
+	<-observer.started
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+	if err := dispatcher.close(ctx); err != nil {
+		t.Fatalf("close returned error: %v", err)
+	}
+}
+
+func TestObserverDispatcherCloseTimeout(t *testing.T) {
+	observer := &stubbornObserver{started: make(chan struct{}), release: make(chan struct{})}
+	dispatcher := newObserverDispatcher(observer, nil)
+	dispatcher.enqueue(context.Background(), UpdateReceivedEvent{})
+	<-observer.started
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond)
+	defer cancel()
+	if err := dispatcher.close(ctx); !errors.Is(err, ErrObserverShutdownTimeout) {
+		t.Fatalf("close error = %v, want ErrObserverShutdownTimeout", err)
+	}
+	close(observer.release)
+	if err := dispatcher.close(context.Background()); err != nil {
+		t.Fatalf("second close returned error: %v", err)
+	}
+}

plugins.go

@@ -2,6 +2,7 @@ package laniakea
 
 import (
 	"errors"
+	"fmt"
 
 	"git.scuroneko.dev/scuroneko/extypes"
 	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
@@ -9,6 +10,8 @@ import (
 	"git.scuroneko.dev/scuroneko/sneklog/v2"
 )
 
+var errMiddlewareBlocked = errors.New("middleware blocked call")
+
 // Plugin represents a collection of commands and payloads (e.g., callback handlers),
 // with shared middleware and configuration.
 //
@@ -53,6 +56,12 @@ func (p *Plugin[T]) AddCommand(command *Command[T]) *Plugin[T] {
 		}
 		return p
 	}
+	if command.exec == nil {
+		if p.logger != nil {
+			p.logger.Warnf("command '%s' has a nil executor; skipping", command.command)
+		}
+		return p
+	}
 	if _, exists := p.commands[command.command]; exists && p.logger != nil {
 		p.logger.Warnf("command '%s' already registered in plugin '%s'; overwriting", command.command, p.name)
 	}
@@ -77,6 +86,12 @@ func (p *Plugin[T]) AddPayload(command *Command[T]) *Plugin[T] {
 		}
 		return p
 	}
+	if command.exec == nil {
+		if p.logger != nil {
+			p.logger.Warnf("payload '%s' has a nil executor; skipping", command.command)
+		}
+		return p
+	}
 	if _, exists := p.payloads[command.command]; exists && p.logger != nil {
 		p.logger.Warnf("payload '%s' is already registered in plugin '%s'; overwriting", command.command, p.name)
 	}
@@ -152,6 +167,12 @@ func (p *Plugin[T]) UsePolicy(name string, policy Policy[T]) *Plugin[T] {
 // AddUpdateHandler registers a handler for a non-command update type.
 // Message, channel post, and callback query updates stay on the command/payload flow.
 func (p *Plugin[T]) AddUpdateHandler(t tgapi.UpdateType, handler CommandExecutor[T]) *Plugin[T] {
+	if handler == nil {
+		if p.logger != nil {
+			p.logger.Warnf("update handler '%s' has a nil executor; skipping", t)
+		}
+		return p
+	}
 	switch t {
 	case tgapi.UpdateTypeMessage, tgapi.UpdateTypeChannelPost, tgapi.UpdateTypeCallbackQuery:
 		if p.logger == nil {
@@ -249,12 +270,12 @@ func (p *Plugin[T]) executeCmd(cmd string, ctx *MessageContext, db T) error {
 	// Run command-specific middlewares
 	for _, m := range command.middlewares {
 		if !m.Execute(ctx, db) {
-			return AsInternalError(errors.New("middleware blocked call"))
+			return errMiddlewareBlocked
 		}
 	}
 
 	// Execute command
-	return command.exec(ctx, db)
+	return callCommandExecutor(command.exec, ctx, db)
 }
 
 func (p *Plugin[T]) executePayload(payload string, ctx *MessageContext, db T) error {
@@ -270,12 +291,24 @@ func (p *Plugin[T]) executePayload(payload string, ctx *MessageContext, db T) er
 	// Run command-specific middlewares
 	for _, m := range command.middlewares {
 		if !m.Execute(ctx, db) {
-			return AsInternalError(errors.New("middleware blocked call"))
+			return errMiddlewareBlocked
 		}
 	}
 
 	// Execute payload
-	return command.exec(ctx, db)
+	return callCommandExecutor(command.exec, ctx, db)
+}
+
+func callCommandExecutor[T AppData](executor CommandExecutor[T], ctx *MessageContext, db T) (err error) {
+	if executor == nil {
+		return ErrHandlerExecutorNil
+	}
+	defer func() {
+		if recovered := recover(); recovered != nil {
+			err = fmt.Errorf("%w: %v", ErrHandlerPanic, recovered)
+		}
+	}()
+	return executor(ctx, db)
 }
 
 func (p *Plugin[T]) executeMiddlewares(ctx *MessageContext, db T) bool {
@@ -292,6 +325,9 @@ func (p *Plugin[T]) executeMiddlewares(ctx *MessageContext, db T) bool {
 // If async, return value is ignored.
 type MiddlewareExecutor[T AppData] func(ctx *MessageContext, db T) bool
 
+// ErrMiddlewareExecutorNil reports an attempt to execute middleware without a callback.
+var ErrMiddlewareExecutorNil = errors.New("middleware executor is nil")
+
 // Middleware represents a reusable execution interceptor.
 // Can be synchronous (blocking) or asynchronous (non-blocking).
 type Middleware[T AppData] struct {
@@ -306,7 +342,7 @@ func NewMiddleware[T AppData](name string, executor MiddlewareExecutor[T]) Middl
 	return Middleware[T]{name, executor, 0, false}
 }
 
-// SetOrder sets the execution order (currently ignored).
+// SetOrder sets the bot-level middleware execution order.
 func (m Middleware[T]) SetOrder(order int) Middleware[T] {
 	m.order = order
 	return m
@@ -329,13 +365,54 @@ func (m Middleware[T]) SetAsync(async bool) Middleware[T] {
 // continue to share storage with the synchronous flow. Async middleware
 // must treat those fields as read-only — mutating them races the sync chain
 // that mutates the same context concurrently.
+// Bot runtimes wait for tracked asynchronous middleware before returning.
 func (m Middleware[T]) Execute(ctx *MessageContext, db T) bool {
+	if m.executor == nil {
+		reportMiddlewareError(ctx, m.name, ErrMiddlewareExecutorNil)
+		return false
+	}
 	if m.async {
 		ctxCopy := *ctx
-		go func(ctx MessageContext) {
-			m.executor(&ctx, db)
-		}(ctxCopy)
+		task := func() {
+			defer func() {
+				if recovered := recover(); recovered != nil {
+					reportMiddlewareError(&ctxCopy, m.name, fmt.Errorf("%w in middleware %q: %v", ErrHandlerPanic, m.name, recovered))
+				}
+			}()
+			m.executor(&ctxCopy, db)
+		}
+		if ctx.asyncTask != nil {
+			ctx.asyncTask(task)
+		} else {
+			go task()
+		}
 		return true
 	}
-	return m.executor(ctx, db)
+	result := false
+	func() {
+		defer func() {
+			if recovered := recover(); recovered != nil {
+				reportMiddlewareError(ctx, m.name, fmt.Errorf("%w in middleware %q: %v", ErrHandlerPanic, m.name, recovered))
+			}
+		}()
+		result = m.executor(ctx, db)
+	}()
+	return result
+}
+
+func reportMiddlewareError(ctx *MessageContext, name string, err error) {
+	event := ErrorEvent{
+		Plugin:      "bot",
+		HandlerKind: HandlerMiddlewareKind,
+		HandlerName: name,
+		Err:         err,
+		UserFacing:  false,
+	}
+	if ctx != nil {
+		event.UpdateID = ctx.Update.UpdateID
+		event.UpdateType = ctx.Update.Type
+		event.FromID = ctx.FromID
+		event.ChatID = ctx.ChatID
+	}
+	emitContextError(ctx, event)
 }

plugins_test.go

@@ -1,10 +1,117 @@
 package laniakea
 
 import (
+	"context"
 	"errors"
 	"testing"
+	"time"
+
+	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
 )
 
+type middlewareErrorObserver struct {
+	testObserver
+	errors chan ErrorEvent
+}
+
+func (o *middlewareErrorObserver) OnError(_ context.Context, event ErrorEvent) {
+	o.errors <- event
+}
+
+func TestAsyncMiddlewareRecoversPanic(t *testing.T) {
+	observer := &middlewareErrorObserver{errors: make(chan ErrorEvent, 1)}
+	ctx := &MessageContext{
+		Update:   tgapi.Update{UpdateID: 7, Type: tgapi.UpdateTypeMessage},
+		FromID:   42,
+		ChatID:   100,
+		observer: observer,
+	}
+	middleware := NewMiddleware[NoData]("panic", func(ctx *MessageContext, db NoData) bool {
+		panic("boom")
+	}).SetAsync(true)
+
+	if !middleware.Execute(ctx, NoData{}) {
+		t.Fatal("async middleware blocked execution")
+	}
+	select {
+	case event := <-observer.errors:
+		if event.HandlerKind != HandlerMiddlewareKind || event.HandlerName != "panic" {
+			t.Fatalf("unexpected error event: %#v", event)
+		}
+		if event.Err == nil {
+			t.Fatal("panic error was not reported")
+		}
+		if !errors.Is(event.Err, ErrHandlerPanic) {
+			t.Fatalf("expected ErrHandlerPanic, got %v", event.Err)
+		}
+	case <-time.After(time.Second):
+		t.Fatal("timed out waiting for async middleware error")
+	}
+}
+
+func TestAsyncMiddlewareUsesContextTaskTracker(t *testing.T) {
+	bot := new(Bot[NoData])
+	started := make(chan struct{})
+	release := make(chan struct{})
+	ctx := &MessageContext{asyncTask: bot.startAsyncTask}
+	middleware := NewMiddleware[NoData]("tracked", func(*MessageContext, NoData) bool {
+		close(started)
+		<-release
+		return true
+	}).SetAsync(true)
+
+	if !middleware.Execute(ctx, NoData{}) {
+		t.Fatal("async middleware blocked execution")
+	}
+	<-started
+	waited := make(chan struct{})
+	go func() {
+		bot.middlewareWG.Wait()
+		close(waited)
+	}()
+	select {
+	case <-waited:
+		t.Fatal("task tracker finished before middleware returned")
+	case <-time.After(20 * time.Millisecond):
+	}
+	close(release)
+	select {
+	case <-waited:
+	case <-time.After(time.Second):
+		t.Fatal("task tracker did not finish after middleware returned")
+	}
+}
+
+func TestSyncMiddlewareRecoversPanic(t *testing.T) {
+	observer := &middlewareErrorObserver{errors: make(chan ErrorEvent, 1)}
+	ctx := &MessageContext{observer: observer}
+	middleware := NewMiddleware[NoData]("panic", func(ctx *MessageContext, db NoData) bool {
+		panic("boom")
+	})
+
+	if middleware.Execute(ctx, NoData{}) {
+		t.Fatal("panicking synchronous middleware continued execution")
+	}
+	event := <-observer.errors
+	if !errors.Is(event.Err, ErrHandlerPanic) {
+		t.Fatalf("expected ErrHandlerPanic, got %v", event.Err)
+	}
+}
+
+func TestMiddlewareRejectsNilExecutor(t *testing.T) {
+	observer := &middlewareErrorObserver{errors: make(chan ErrorEvent, 1)}
+	ctx := &MessageContext{observer: observer}
+	middleware := NewMiddleware[NoData]("nil", nil)
+
+	if middleware.Execute(ctx, NoData{}) {
+		t.Fatal("nil middleware executor was accepted")
+	}
+	event := <-observer.errors
+	if !errors.Is(event.Err, ErrMiddlewareExecutorNil) {
+		t.Fatalf("error = %v, want ErrMiddlewareExecutorNil", event.Err)
+	}
+}
+
 func TestValidateArgsRequiresFullMatch(t *testing.T) {
 	intCmd := NewCommand("int", func(ctx *MessageContext, db NoData) error { return nil }, NewCommandArg("n").SetValueType(CommandValueInt).SetRequired())
 	if err := intCmd.validateArgs([]string{"123"}); err != nil {
@@ -116,3 +223,14 @@ func TestPluginCommandGroupRegistersBuiltCommands(t *testing.T) {
 	plugin.CommandGroup("ignored", nil)
 	plugin.AddCommandGroup(nil)
 }
+
+func TestPluginSkipsNilHandlers(t *testing.T) {
+	plugin := NewPlugin[NoData]("nil")
+	plugin.AddCommand(NewCommand[NoData]("command", nil))
+	plugin.AddPayload(NewCommand[NoData]("payload", nil))
+	plugin.AddUpdateHandler(tgapi.UpdateTypeEditedMessage, nil)
+
+	if len(plugin.commands) != 0 || len(plugin.payloads) != 0 || len(plugin.handlers) != 0 {
+		t.Fatalf("nil handlers were registered: commands=%d payloads=%d updates=%d", len(plugin.commands), len(plugin.payloads), len(plugin.handlers))
+	}
+}

policy.go

@@ -143,7 +143,7 @@ func RequireChatAdmin[T AppData]() Policy[T] {
 			return AsInternalError(errors.New("chat-admin policy requires message chat context"))
 		}
 
-		member, err := ctx.API.GetChatMember(tgapi.GetChatMember{
+		member, err := ctx.API.GetChatMemberWithContext(ctx.Context(), tgapi.GetChatMember{
 			ChatID: ctx.ChatID,
 			UserID: ctx.FromID,
 		})
@@ -166,7 +166,7 @@ func RequireChatCreator[T AppData]() Policy[T] {
 			return AsInternalError(errors.New("chat-creator policy requires message chat context"))
 		}
 
-		member, err := ctx.API.GetChatMember(tgapi.GetChatMember{
+		member, err := ctx.API.GetChatMemberWithContext(ctx.Context(), tgapi.GetChatMember{
 			ChatID: ctx.ChatID,
 			UserID: ctx.FromID,
 		})
@@ -192,7 +192,7 @@ func RequireBotAdmin[T AppData]() Policy[T] {
 			return AsInternalError(errors.New("bot ID is not set in context"))
 		}
 
-		member, err := ctx.API.GetChatMember(tgapi.GetChatMember{
+		member, err := ctx.API.GetChatMemberWithContext(ctx.Context(), tgapi.GetChatMember{
 			ChatID: ctx.ChatID, UserID: ctx.botID,
 		})
 		if err != nil {

policy_test.go

@@ -157,6 +157,43 @@ func TestRequireChatAdminUsesNormalizedIDs(t *testing.T) {
 	}
 }
 
+func TestRequireChatAdminUsesMessageContextCancellation(t *testing.T) {
+	api := tgapi.NewAPI(
+		tgapi.NewAPIOpts("token").
+			SetAPIURL("https://example.test").
+			SetHTTPClient(&http.Client{Transport: roundTripFunc(func(req *http.Request) (*http.Response, error) {
+				if err := req.Context().Err(); err != nil {
+					return nil, err
+				}
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Header:     http.Header{"Content-Type": []string{"application/json"}},
+					Body:       io.NopCloser(strings.NewReader(`{"ok":true,"result":{"status":"administrator","user":{"id":55,"is_bot":false,"first_name":"tester"}}}`)),
+				}, nil
+			})}),
+	)
+	t.Cleanup(func() {
+		if err := api.Close(); err != nil {
+			t.Fatalf("Close returned error: %v", err)
+		}
+	})
+
+	requestCtx, cancel := context.WithCancel(context.Background())
+	cancel()
+	ctx := &MessageContext{
+		API:    api,
+		ChatID: -2001,
+		FromID: 55,
+		Logger: sneklog.NewLogger(),
+		ctx:    requestCtx,
+	}
+
+	err := RequireChatAdmin[NoData]()(ctx, NoData{})
+	if !errors.Is(err, context.Canceled) || !IsInternalError(err) {
+		t.Fatalf("RequireChatAdmin error = %v, want internal context.Canceled", err)
+	}
+}
+
 func TestAllPoliciesReturnsFirstError(t *testing.T) {
 	want := AsUserError(errors.New("blocked"))
 	policy := AllPolicies(

runners.go

@@ -2,13 +2,21 @@ package laniakea
 
 import (
 	"context"
+	"fmt"
 	"time"
 )
 
-// RunnerFn is the function type for a runner. It receives a pointer to
-// the Bot and returns an error if execution fails.
+// RunnerFn is the legacy function type for a runner. It receives a pointer to
+// the Bot and returns an error if execution fails. New blocking or I/O work
+// should use ContextRunnerFn so runtime cancellation can stop the callback.
+//
+// Subject to change in v2: runner callbacks may require context.Context.
 type RunnerFn[T AppData] func(*Bot[T]) error
 
+// ContextRunnerFn is a cancelable runner function.
+// The runtime context is canceled when polling or webhook execution stops.
+type ContextRunnerFn[T AppData] func(context.Context, *Bot[T]) error
+
 // Runner represents a configurable background or one-time task to be
 // executed by a Bot.
 //
@@ -25,6 +33,22 @@ type Runner[T AppData] struct {
 	async bool          // If true, runs in a goroutine; else, runs synchronously
 	every time.Duration // Interval between periodic executions; zero means one-shot
 	fn    RunnerFn[T]   // The function to execute
+	ctxFn ContextRunnerFn[T]
+}
+
+func executeRunnerWithContext[T AppData](ctx context.Context, runner Runner[T], bot *Bot[T]) (err error) {
+	defer func() {
+		if recovered := recover(); recovered != nil {
+			err = fmt.Errorf("runner %q panicked: %v", runner.name, recovered)
+		}
+	}()
+	if runner.ctxFn != nil {
+		return runner.ctxFn(ctx, bot)
+	}
+	if runner.fn == nil {
+		return fmt.Errorf("runner %q has no function", runner.name)
+	}
+	return runner.fn(bot)
 }
 
 // NewRunner creates a new Runner with the given name and function.
@@ -33,13 +57,16 @@ type Runner[T AppData] struct {
 // goroutine that fires once when the bot runtime starts. Use Async and Every
 // to customize this. Do not call builder methods concurrently or after the
 // bot runtime has begun executing runners.
+//
+// Subject to change in v2: NewContextRunner may become the primary constructor.
 func NewRunner[T AppData](name string, fn RunnerFn[T]) Runner[T] {
-	return Runner[T]{
-		name:  name,
-		fn:    fn,
-		async: true,
-		every: 0,
-	}
+	return Runner[T]{name: name, fn: fn, async: true, every: 0}
+}
+
+// NewContextRunner creates a runner whose callback observes runtime cancellation.
+// It is the preferred constructor for I/O, blocking, and periodic work.
+func NewContextRunner[T AppData](name string, fn ContextRunnerFn[T]) Runner[T] {
+	return Runner[T]{name: name, ctxFn: fn, async: true, every: 0}
 }
 
 // Async sets whether the runner executes synchronously or asynchronously.
@@ -66,7 +93,7 @@ func (r Runner[T]) Every(timeout time.Duration) Runner[T] {
 // ExecRunners executes all runners registered on the Bot with context-based lifecycle management.
 //
 // Execution semantics by configuration:
-//   - every=0, async=true:  Runs once in a goroutine (fire and forget).
+//   - every=0, async=true:  Runs once in a goroutine; runtime shutdown waits for it.
 //   - every=0, async=false: Runs once synchronously; warns if slower than 2 seconds.
 //   - every>0, async=true:  Runs in a loop with the configured interval until ctx.Done().
 //   - every>0, async=false: Skipped with a warning (invalid configuration).
@@ -84,12 +111,12 @@ func (bot *Bot[T]) ExecRunners(ctx context.Context) {
 		}
 
 		if runner.every == 0 && runner.async {
-			// One-time async: fire and forget
+			// One-time async: non-blocking startup; runtime shutdown waits for completion.
 			bot.runnerOnceWG.Add(1)
 			go func(r Runner[T]) {
 				defer bot.runnerOnceWG.Done()
 				startedAt := time.Now()
-				err := r.fn(bot)
+				err := executeRunnerWithContext(ctx, r, bot)
 				bot.safeEmitEvent(ctx, RunnerFinishedEvent{
 					Name:     r.name,
 					Duration: time.Since(startedAt),
@@ -109,7 +136,7 @@ func (bot *Bot[T]) ExecRunners(ctx context.Context) {
 		} else if runner.every == 0 && !runner.async {
 			// One-time sync: block until done
 			t := time.Now()
-			err := runner.fn(bot)
+			err := executeRunnerWithContext(ctx, runner, bot)
 			elapsed := time.Since(t)
 			bot.safeEmitEvent(ctx, RunnerFinishedEvent{
 				Name:     runner.name,
@@ -150,7 +177,7 @@ func (bot *Bot[T]) ExecRunners(ctx context.Context) {
 						return
 					}
 					startedAt := time.Now()
-					err := r.fn(bot)
+					err := executeRunnerWithContext(ctx, r, bot)
 					bot.safeEmitEvent(ctx, RunnerFinishedEvent{
 						Name:     r.name,
 						Duration: time.Since(startedAt),

runners_test.go

@@ -95,3 +95,61 @@ func TestExecRunnersEmitObserverEvents(t *testing.T) {
 		t.Fatalf("unexpected runner error event: %#v", got)
 	}
 }
+
+func TestExecRunnersRecoversRunnerPanic(t *testing.T) {
+	observer := &runnerObserver{}
+	bot := &Bot[NoData]{
+		logger:   sneklog.NewLogger(),
+		observer: observer,
+		runners: []Runner[NoData]{
+			NewRunner("panic", func(*Bot[NoData]) error {
+				panic("boom")
+			}).Async(false),
+		},
+	}
+	defer func() {
+		if err := bot.logger.Close(); err != nil {
+			t.Fatalf("Close returned error: %v", err)
+		}
+	}()
+
+	bot.ExecRunners(context.Background())
+
+	if len(observer.runners) != 1 || observer.runners[0].Err == nil {
+		t.Fatalf("expected recovered panic in runner event, got %#v", observer.runners)
+	}
+	if len(observer.errors) != 1 || observer.errors[0].Err == nil {
+		t.Fatalf("expected recovered panic in error event, got %#v", observer.errors)
+	}
+}
+
+func TestContextRunnerStopsActiveCallbackOnCancel(t *testing.T) {
+	started := make(chan struct{})
+	stopped := make(chan struct{})
+	ctx, cancel := context.WithCancel(context.Background())
+	bot := &Bot[NoData]{
+		logger: sneklog.NewLogger(),
+		runners: []Runner[NoData]{
+			NewContextRunner("cancelable", func(ctx context.Context, _ *Bot[NoData]) error {
+				close(started)
+				<-ctx.Done()
+				close(stopped)
+				return ctx.Err()
+			}),
+		},
+	}
+
+	bot.ExecRunners(ctx)
+	select {
+	case <-started:
+	case <-time.After(time.Second):
+		t.Fatal("context runner did not start")
+	}
+	cancel()
+	bot.runnerOnceWG.Wait()
+	select {
+	case <-stopped:
+	default:
+		t.Fatal("context runner did not observe cancellation")
+	}
+}

scene.go

@@ -1,7 +1,9 @@
 package laniakea
 
 import (
+	"bytes"
 	"encoding/json"
+	"fmt"
 	"maps"
 	"sync"
 )
@@ -54,18 +56,27 @@ func (s *Scene[T]) setPluginName(name string) *Scene[T] {
 
 // OnStep registers a handler for a named scene step.
 func (s *Scene[T]) OnStep(step string, handler SceneHandler[T]) *Scene[T] {
+	if handler == nil {
+		return s
+	}
 	s.steps[step] = handler
 	return s
 }
 
 // OnCommand registers a command handler active while the scene is running.
 func (s *Scene[T]) OnCommand(cmd string, handler SceneHandler[T]) *Scene[T] {
+	if handler == nil {
+		return s
+	}
 	s.commands[cmd] = handler
 	return s
 }
 
 // OnPayload registers a callback payload handler active while the scene is running.
 func (s *Scene[T]) OnPayload(cmd string, handler SceneHandler[T]) *Scene[T] {
+	if handler == nil {
+		return s
+	}
 	s.payloads[cmd] = handler
 	return s
 }
@@ -81,7 +92,7 @@ func (s *Scene[T]) executeCommand(cmd string, ctx *SceneContext, db T) (SceneRes
 	if !ok {
 		return SceneResult{}, false, nil
 	}
-	result, err := handler(ctx, db)
+	result, err := callSceneHandler(handler, ctx, db)
 	return result, true, err
 }
 func (s *Scene[T]) executePayload(cmd string, ctx *SceneContext, db T) (SceneResult, bool, error) {
@@ -89,7 +100,7 @@ func (s *Scene[T]) executePayload(cmd string, ctx *SceneContext, db T) (SceneRes
 	if !ok {
 		return SceneResult{}, false, nil
 	}
-	result, err := handler(ctx, db)
+	result, err := callSceneHandler(handler, ctx, db)
 	return result, true, err
 }
 func (s *Scene[T]) executeStep(step string, ctx *SceneContext, db T) (SceneResult, bool, error) {
@@ -97,17 +108,30 @@ func (s *Scene[T]) executeStep(step string, ctx *SceneContext, db T) (SceneResul
 	if !ok {
 		return SceneResult{}, false, nil
 	}
-	result, err := handler(ctx, db)
+	result, err := callSceneHandler(handler, ctx, db)
 	return result, true, err
 }
 func (s *Scene[T]) executeMessage(ctx *SceneContext, db T) (SceneResult, bool, error) {
 	if s.message == nil {
 		return SceneResult{}, false, nil
 	}
-	result, err := s.message(ctx, db)
+	result, err := callSceneHandler(s.message, ctx, db)
 	return result, true, err
 }
 
+func callSceneHandler[T any](handler SceneHandler[T], ctx *SceneContext, db T) (result SceneResult, err error) {
+	if handler == nil {
+		return SceneResult{}, ErrHandlerExecutorNil
+	}
+	defer func() {
+		if recovered := recover(); recovered != nil {
+			result = SceneResult{}
+			err = fmt.Errorf("%w: %v", ErrHandlerPanic, recovered)
+		}
+	}()
+	return handler(ctx, db)
+}
+
 func (s *Scene[T]) clone() *Scene[T] {
 	if s == nil {
 		return nil
@@ -131,18 +155,17 @@ type SceneSession struct {
 	Scene string
 	// Step is the current step name inside the active scene.
 	Step string
-	// data stores opaque session payload bytes, typically JSON.
 	data []byte
 }
 
 // SetData stores arbitrary opaque session data.
 func (s *SceneSession) SetData(data []byte) {
-	s.data = data
+	s.data = bytes.Clone(data)
 }
 
 // GetData returns the raw session data payload.
 func (s *SceneSession) GetData() []byte {
-	return s.data
+	return bytes.Clone(s.data)
 }
 
 // HasData reports whether the session has a non-empty data payload.
@@ -198,6 +221,7 @@ func (s *MemorySessionStore) Get(key string) (SceneSession, error) {
 	s.mu.RLock()
 	defer s.mu.RUnlock()
 	if session, ok := s.store[key]; ok {
+		session.data = bytes.Clone(session.data)
 		return session, nil
 	}
 	return SceneSession{}, nil
@@ -205,6 +229,7 @@ func (s *MemorySessionStore) Get(key string) (SceneSession, error) {
 
 // Set stores session under key.
 func (s *MemorySessionStore) Set(key string, session SceneSession) error {
+	session.data = bytes.Clone(session.data)
 	s.mu.Lock()
 	s.store[key] = session
 	s.mu.Unlock()
@@ -221,8 +246,10 @@ func (s *MemorySessionStore) Delete(key string) error {
 
 // SceneResult describes how scene execution should proceed after a handler returns.
 type SceneResult struct {
+	// Action controls the scene state transition.
 	Action SceneAction
-	Next   string
+	// Next names the destination step for SceneActionNext.
+	Next string
 }
 
 // SceneAction controls how the bot updates scene state after a handler returns.

scene_handler.go

@@ -1,24 +1,37 @@
 package laniakea
 
 import (
-	"errors"
 	"fmt"
 	"strings"
 	"time"
 )
 
 func (bot *Bot[T]) tryHandleScene(ctx *MessageContext) (bool, error) {
-	key, session, err := bot.findSceneSession(ctx)
-	if err != nil {
-		if errors.Is(err, ErrCantFindSession) {
-			return false, nil
+	for _, scope := range bot.sceneScopePriority {
+		key, ok := buildSceneKey(scope, ctx)
+		if !ok {
+			continue
 		}
-		return false, err
-	}
-	if session.Scene == "" {
-		return false, nil
-	}
 
+		unlock := bot.sceneLocks.lock([]string{key})
+		session, err := bot.sessionStore.Get(key)
+		if err != nil {
+			unlock()
+			return false, err
+		}
+		if session.Scene == "" {
+			unlock()
+			continue
+		}
+
+		handled, err := bot.tryHandleSceneSession(ctx, key, session)
+		unlock()
+		return handled, err
+	}
+	return false, nil
+}
+
+func (bot *Bot[T]) tryHandleSceneSession(ctx *MessageContext, key string, session SceneSession) (bool, error) {
 	for _, plugin := range bot.plugins {
 		scene, ok := plugin.scenes[session.Scene]
 		if !ok {
@@ -67,14 +80,13 @@ func (bot *Bot[T]) executeScene(ctx *SceneContext, scene *Scene[T]) (bool, error
 			res, _, err := scene.executeCommand(cmd, ctx, bot.appData)
 			if err != nil {
 				bot.emitSceneFinished(ctx, scene, HandlerSceneCommandKind, cmd, startTime, err)
-				bot.emitSceneError(ctx, scene, HandlerSceneCommandKind, cmd, err)
-				return false, err
+				return false, bot.emitSceneError(ctx, scene, HandlerSceneCommandKind, cmd, err)
 			}
 			from := ctx.sess.Step
 			ok, err := bot.applySceneResult(scene, ctx, res)
 			bot.emitSceneFinished(ctx, scene, HandlerSceneCommandKind, cmd, startTime, err)
 			if err != nil {
-				bot.emitSceneError(ctx, scene, HandlerSceneCommandKind, cmd, err)
+				err = bot.emitSceneError(ctx, scene, HandlerSceneCommandKind, cmd, err)
 			}
 			if ok {
 				bot.emitSceneTransition(ctx, scene, from, res)
@@ -101,14 +113,13 @@ func (bot *Bot[T]) executeScene(ctx *SceneContext, scene *Scene[T]) (bool, error
 			res, _, err := scene.executePayload(cmd, ctx, bot.appData)
 			if err != nil {
 				bot.emitSceneFinished(ctx, scene, HandlerScenePayloadKind, cmd, startTime, err)
-				bot.emitSceneError(ctx, scene, HandlerScenePayloadKind, cmd, err)
-				return false, err
+				return false, bot.emitSceneError(ctx, scene, HandlerScenePayloadKind, cmd, err)
 			}
 			from := ctx.sess.Step
 			ok, err := bot.applySceneResult(scene, ctx, res)
 			bot.emitSceneFinished(ctx, scene, HandlerScenePayloadKind, cmd, startTime, err)
 			if err != nil {
-				bot.emitSceneError(ctx, scene, HandlerScenePayloadKind, cmd, err)
+				err = bot.emitSceneError(ctx, scene, HandlerScenePayloadKind, cmd, err)
 			}
 			if ok {
 				bot.emitSceneTransition(ctx, scene, from, res)
@@ -132,14 +143,13 @@ func (bot *Bot[T]) executeScene(ctx *SceneContext, scene *Scene[T]) (bool, error
 			res, _, err := scene.executeStep(step, ctx, bot.appData)
 			if err != nil {
 				bot.emitSceneFinished(ctx, scene, HandlerSceneStepKind, step, startTime, err)
-				bot.emitSceneError(ctx, scene, HandlerSceneStepKind, step, err)
-				return false, err
+				return false, bot.emitSceneError(ctx, scene, HandlerSceneStepKind, step, err)
 			}
 			from := step
 			ok, err := bot.applySceneResult(scene, ctx, res)
 			bot.emitSceneFinished(ctx, scene, HandlerSceneStepKind, step, startTime, err)
 			if err != nil {
-				bot.emitSceneError(ctx, scene, HandlerSceneStepKind, from, err)
+				err = bot.emitSceneError(ctx, scene, HandlerSceneStepKind, from, err)
 			}
 			if ok {
 				bot.emitSceneTransition(ctx, scene, from, res)
@@ -154,14 +164,13 @@ func (bot *Bot[T]) executeScene(ctx *SceneContext, scene *Scene[T]) (bool, error
 		res, _, err := scene.executeMessage(ctx, bot.appData)
 		if err != nil {
 			bot.emitSceneFinished(ctx, scene, HandlerSceneMessageKind, "message_fallback", startTime, err)
-			bot.emitSceneError(ctx, scene, HandlerSceneMessageKind, "message_fallback", err)
-			return false, err
+			return false, bot.emitSceneError(ctx, scene, HandlerSceneMessageKind, "message_fallback", err)
 		}
 		from := ctx.sess.Step
 		ok, err := bot.applySceneResult(scene, ctx, res)
 		bot.emitSceneFinished(ctx, scene, HandlerSceneMessageKind, "message_fallback", startTime, err)
 		if err != nil {
-			bot.emitSceneError(ctx, scene, HandlerSceneMessageKind, "message_fallback", err)
+			err = bot.emitSceneError(ctx, scene, HandlerSceneMessageKind, "message_fallback", err)
 		}
 		if ok {
 			bot.emitSceneTransition(ctx, scene, from, res)
@@ -199,7 +208,14 @@ func (bot *Bot[T]) emitSceneFinished(ctx *SceneContext, scene *Scene[T], kind Ha
 	})
 }
 
-func (bot *Bot[T]) emitSceneError(ctx *SceneContext, scene *Scene[T], kind HandlerEventKind, name string, err error) {
+type reportedSceneError struct {
+	err error
+}
+
+func (e *reportedSceneError) Error() string { return e.err.Error() }
+func (e *reportedSceneError) Unwrap() error { return e.err }
+
+func (bot *Bot[T]) emitSceneError(ctx *SceneContext, scene *Scene[T], kind HandlerEventKind, name string, err error) error {
 	bot.safeEmitEvent(ctx.Context(), ErrorEvent{
 		UpdateID:    ctx.Update.UpdateID,
 		UpdateType:  ctx.Update.Type,
@@ -211,6 +227,7 @@ func (bot *Bot[T]) emitSceneError(ctx *SceneContext, scene *Scene[T], kind Handl
 		Err:         err,
 		UserFacing:  IsUserError(err),
 	})
+	return &reportedSceneError{err: err}
 }
 
 func (bot *Bot[T]) emitSceneTransition(ctx *SceneContext, scene *Scene[T], from string, result SceneResult) {
@@ -266,7 +283,7 @@ func (bot *Bot[T]) applySceneResult(scene *Scene[T], ctx *SceneContext, result S
 	case SceneActionPass:
 		return false, nil
 	default:
-		return false, nil
+		return false, fmt.Errorf("%w: %v", ErrInvalidSceneAction, result.Action)
 	}
 }
 func buildSceneKey(scope SceneScope, ctx *MessageContext) (string, bool) {

scene_locks.go

@@ -0,0 +1,70 @@
+package laniakea
+
+import (
+	"sort"
+	"sync"
+)
+
+type sceneLockEntry struct {
+	mu   sync.Mutex
+	refs int
+}
+
+type sceneKeyLocker struct {
+	mu      sync.Mutex
+	entries map[string]*sceneLockEntry
+}
+
+func (l *sceneKeyLocker) lock(keys []string) func() {
+	keys = uniqueSortedStrings(keys)
+	if len(keys) == 0 {
+		return func() {}
+	}
+
+	l.mu.Lock()
+	if l.entries == nil {
+		l.entries = make(map[string]*sceneLockEntry)
+	}
+	entries := make([]*sceneLockEntry, len(keys))
+	for i, key := range keys {
+		entry := l.entries[key]
+		if entry == nil {
+			entry = new(sceneLockEntry)
+			l.entries[key] = entry
+		}
+		entry.refs++
+		entries[i] = entry
+	}
+	l.mu.Unlock()
+
+	for _, entry := range entries {
+		entry.mu.Lock()
+	}
+
+	return func() {
+		for i := len(entries) - 1; i >= 0; i-- {
+			entries[i].mu.Unlock()
+		}
+
+		l.mu.Lock()
+		for i, key := range keys {
+			entries[i].refs--
+			if entries[i].refs == 0 {
+				delete(l.entries, key)
+			}
+		}
+		l.mu.Unlock()
+	}
+}
+
+func uniqueSortedStrings(values []string) []string {
+	sort.Strings(values)
+	result := values[:0]
+	for _, value := range values {
+		if value == "" || len(result) > 0 && result[len(result)-1] == value {
+			continue
+		}
+		result = append(result, value)
+	}
+	return result
+}

scene_test.go

@@ -3,7 +3,10 @@ package laniakea
 import (
 	"context"
 	"errors"
+	"sync"
+	"sync/atomic"
 	"testing"
+	"time"
 
 	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
 	"git.scuroneko.dev/scuroneko/sneklog/v2"
@@ -41,6 +44,114 @@ func TestPluginAddSceneRegistersScene(t *testing.T) {
 	}
 }
 
+func TestBotAddPluginsSkipsDuplicateSceneNames(t *testing.T) {
+	first := NewPlugin[NoData]("first")
+	first.Scene("shared")
+	second := NewPlugin[NoData]("second")
+	second.Scene("shared")
+
+	bot := &Bot[NoData]{logger: sneklog.NewLogger()}
+	bot.AddPlugins(first, second)
+
+	if _, ok := bot.plugins[0].scenes["shared"]; !ok {
+		t.Fatal("first registered scene was removed")
+	}
+	if _, ok := bot.plugins[1].scenes["shared"]; ok {
+		t.Fatal("duplicate scene was registered")
+	}
+}
+
+func TestSceneUpdatesForSameSessionAreSerialized(t *testing.T) {
+	entered := make(chan int, 2)
+	releaseFirst := make(chan struct{})
+	var calls atomic.Int64
+
+	plugin := NewPlugin[NoData]("wizard")
+	plugin.Scene("counter").
+		SetEntry("start").
+		OnStep("start", func(ctx *SceneContext, db NoData) (SceneResult, error) {
+			var value int
+			if err := ctx.BindData(&value); err != nil {
+				return SceneResult{}, err
+			}
+			call := int(calls.Add(1))
+			entered <- call
+			if call == 1 {
+				<-releaseFirst
+			}
+			value++
+			if err := ctx.SaveData(value); err != nil {
+				return SceneResult{}, err
+			}
+			return ctx.Stay(), nil
+		})
+
+	bot := &Bot[NoData]{
+		logger:             sneklog.NewLogger(),
+		prefixes:           []string{"/"},
+		sessionStore:       NewMemorySessionStore(),
+		sceneScopePriority: []SceneScope{SceneScopeUserChat, SceneScopeChat, SceneScopeUser},
+	}
+	bot.AddPlugins(plugin)
+	key := "user_id:42:chat_id:100"
+	session := SceneSession{Scene: "counter", Step: "start"}
+	if err := session.SaveData(0); err != nil {
+		t.Fatalf("SaveData returned error: %v", err)
+	}
+	if err := bot.sessionStore.Set(key, session); err != nil {
+		t.Fatalf("Set returned error: %v", err)
+	}
+
+	update := func(id int) *tgapi.Update {
+		return &tgapi.Update{
+			UpdateID: id,
+			Type:     tgapi.UpdateTypeMessage,
+			Message: &tgapi.Message{
+				MessageID: id,
+				Text:      "increment",
+				Chat:      &tgapi.Chat{ID: 100, Type: tgapi.ChatTypePrivate},
+				From:      &tgapi.User{ID: 42},
+			},
+		}
+	}
+
+	var wg sync.WaitGroup
+	wg.Add(2)
+	go func() {
+		defer wg.Done()
+		bot.handle(context.Background(), update(1))
+	}()
+	if got := <-entered; got != 1 {
+		t.Fatalf("first handler call = %d, want 1", got)
+	}
+	go func() {
+		defer wg.Done()
+		bot.handle(context.Background(), update(2))
+	}()
+	select {
+	case call := <-entered:
+		t.Fatalf("second handler entered before first completed: call %d", call)
+	case <-time.After(50 * time.Millisecond):
+	}
+	close(releaseFirst)
+	if got := <-entered; got != 2 {
+		t.Fatalf("second handler call = %d, want 2", got)
+	}
+	wg.Wait()
+
+	got, err := bot.sessionStore.Get(key)
+	if err != nil {
+		t.Fatalf("Get returned error: %v", err)
+	}
+	var value int
+	if err := got.BindData(&value); err != nil {
+		t.Fatalf("BindData returned error: %v", err)
+	}
+	if value != 2 {
+		t.Fatalf("session value = %d, want 2", value)
+	}
+}
+
 func TestBotAddPluginsPreservesScenesAndHandlesThem(t *testing.T) {
 	called := false
 
@@ -836,6 +947,36 @@ func TestSceneMessageFallbackRunsWhenNoCommandOrStepMatch(t *testing.T) {
 	}
 }
 
+func TestMemorySessionStoreDoesNotAliasSessionData(t *testing.T) {
+	store := NewMemorySessionStore()
+	input := []byte("initial")
+	session := SceneSession{Scene: "signup"}
+	session.SetData(input)
+
+	input[0] = 'X'
+	if got := string(session.GetData()); got != "initial" {
+		t.Fatalf("SetData retained caller slice: got %q", got)
+	}
+	if err := store.Set("user:1", session); err != nil {
+		t.Fatalf("Set returned error: %v", err)
+	}
+
+	first, err := store.Get("user:1")
+	if err != nil {
+		t.Fatalf("Get returned error: %v", err)
+	}
+	data := first.GetData()
+	data[0] = 'X'
+
+	second, err := store.Get("user:1")
+	if err != nil {
+		t.Fatalf("second Get returned error: %v", err)
+	}
+	if got := string(second.GetData()); got != "initial" {
+		t.Fatalf("Get exposed stored data for mutation: got %q", got)
+	}
+}
+
 func TestFindSceneSessionSupportsUserScopeWithoutMessage(t *testing.T) {
 	bot := &Bot[NoData]{
 		logger:             sneklog.NewLogger(),
@@ -896,3 +1037,23 @@ func TestSceneStoreErrorsPropagate(t *testing.T) {
 		}
 	})
 }
+
+func TestSceneSkipsNilHandlers(t *testing.T) {
+	scene := NewScene[NoData]("nil").
+		OnStep("step", nil).
+		OnCommand("command", nil).
+		OnPayload("payload", nil).
+		OnMessage(nil)
+
+	if len(scene.steps) != 0 || len(scene.commands) != 0 || len(scene.payloads) != 0 || scene.message != nil {
+		t.Fatal("scene registered a nil handler")
+	}
+}
+
+func TestApplySceneResultRejectsUnknownAction(t *testing.T) {
+	bot := &Bot[NoData]{sessionStore: NewMemorySessionStore()}
+	_, err := bot.applySceneResult(NewScene[NoData]("scene"), &SceneContext{}, SceneResult{Action: SceneAction(255)})
+	if !errors.Is(err, ErrInvalidSceneAction) {
+		t.Fatalf("expected ErrInvalidSceneAction, got %v", err)
+	}
+}

tgapi/api.go

@@ -13,6 +13,12 @@ import (
 	"git.scuroneko.dev/scuroneko/sneklog/v2"
 )
 
+const (
+	defaultMaxRetries   = 3
+	maximumResponseSize = 10 << 20
+	minimumRetryDelay   = 100 * time.Millisecond
+)
+
 // APIOpts holds configuration options for initializing the Telegram API client.
 // Use the provided setter methods to build options — do not construct directly.
 type APIOpts struct {
@@ -26,6 +32,7 @@ type APIOpts struct {
 
 	limiter           *utils.RateLimiter
 	dropOverflowLimit bool
+	maxRetries        int
 }
 
 // NewAPIOpts creates a new APIOpts with default values.
@@ -36,6 +43,7 @@ func NewAPIOpts(token string) *APIOpts {
 		client:        nil,
 		useTestServer: false,
 		apiURL:        "https://api.telegram.org",
+		maxRetries:    defaultMaxRetries,
 	}
 }
 
@@ -91,6 +99,16 @@ func (opts *APIOpts) SetDropRateLimitOverflow(b bool) *APIOpts {
 	return opts
 }
 
+// SetMaxRetries sets the maximum number of retries after Telegram returns 429.
+// A non-positive value disables automatic retries. The default is 3.
+func (opts *APIOpts) SetMaxRetries(maxRetries int) *APIOpts {
+	if maxRetries < 0 {
+		maxRetries = 0
+	}
+	opts.maxRetries = maxRetries
+	return opts
+}
+
 // API is the main Telegram Bot API client for JSON requests.
 //
 // Use API methods when sending JSON payloads (for example with file_id, URL, or other
@@ -107,9 +125,11 @@ type API struct {
 	logFormat    utils.LogFormat
 	logFormatter *sneklog.Formatter
 
-	pool              *workerPool
+	pool *workerPool
+	// Limiter is the optional rate limiter applied before requests are sent.
 	Limiter           *utils.RateLimiter
 	dropOverflowLimit bool
+	maxRetries        int
 }
 
 // NewAPI creates a new API client from options.
@@ -145,6 +165,7 @@ func NewAPI(opts *APIOpts) *API {
 		pool:              pool,
 		Limiter:           opts.limiter,
 		dropOverflowLimit: opts.dropOverflowLimit,
+		maxRetries:        opts.maxRetries,
 	}
 }
 
@@ -167,18 +188,29 @@ func (api *API) GetLogger() *sneklog.Logger {
 
 // ResponseParameters contains Telegram API response metadata (e.g., retry_after, migrate_to_chat_id).
 type ResponseParameters struct {
+	// MigrateToChatID Optional. The group has been migrated to a supergroup with the specified identifier. This
+	// number may have more than 32 significant bits and some programming languages may have difficulty/silent
+	// defects in interpreting it. But it has at most 52 significant bits, so a signed 64-bit integer or
+	// double-precision float type are safe for storing this identifier.
 	MigrateToChatID *int64 `json:"migrate_to_chat_id,omitempty"`
-	RetryAfter      *int   `json:"retry_after,omitempty"`
+	// RetryAfter Optional. In case of exceeding flood control, the number of seconds left to wait before the
+	// request can be repeated
+	RetryAfter *int `json:"retry_after,omitempty"`
 }
 
 // TelegramResponse is the standard Telegram Bot API response structure.
 // Generic over Result type R.
 type TelegramResponse[R any] struct {
-	Ok          bool                `json:"ok"`
-	Description string              `json:"description,omitempty"`
-	Result      R                   `json:"result,omitempty"`
-	ErrorCode   int                 `json:"error_code,omitempty"`
-	Parameters  *ResponseParameters `json:"parameters,omitempty"`
+	// Ok reports whether the request succeeded.
+	Ok bool `json:"ok"`
+	// Description contains a human-readable result description when supplied by Telegram.
+	Description string `json:"description,omitempty"`
+	// Result contains the method-specific result for a successful response.
+	Result R `json:"result,omitempty"`
+	// ErrorCode is the Telegram API error code for an unsuccessful response.
+	ErrorCode int `json:"error_code,omitempty"`
+	// Parameters contains additional recovery metadata for an unsuccessful response.
+	Parameters *ResponseParameters `json:"parameters,omitempty"`
 }
 
 // TelegramRequest is a low-level Telegram API request wrapper.
@@ -225,6 +257,7 @@ func (r TelegramRequest[R, P]) doRequest(ctx context.Context, api *API) (R, erro
 	req.Header.Set("Accept", "application/json")
 	req.Header.Set("User-Agent", fmt.Sprintf("Laniakea/%s", utils.VersionString))
 
+	retries := 0
 	for {
 		// Apply rate limiting before making the request
 		if api.Limiter != nil {
@@ -236,10 +269,10 @@ func (r TelegramRequest[R, P]) doRequest(ctx context.Context, api *API) (R, erro
 		req.Body = io.NopCloser(buf)
 		req.ContentLength = int64(len(reqData))
 
-		api.logger.Debugln("REQ", url, string(reqData))
+		api.logger.Debugln("REQ", url, redactRequestLog(reqData))
 		resp, err := api.client.Do(req)
 		if err != nil {
-			return zero, fmt.Errorf("HTTP request failed: %w", err)
+			return zero, fmt.Errorf("HTTP request failed: %w", redactHTTPError(err, api.token))
 		}
 
 		respData, err := readBody(resp.Body)
@@ -248,7 +281,7 @@ func (r TelegramRequest[R, P]) doRequest(ctx context.Context, api *API) (R, erro
 			return zero, fmt.Errorf("failed to read response body: %w", err)
 		}
 
-		api.logger.Debugln("RES", r.method, string(respData))
+		api.logger.Debugln("RES", responseLogSummary(r.method, len(respData)))
 
 		response, err := parseBody[R](respData)
 		if err != nil {
@@ -269,7 +302,7 @@ func (r TelegramRequest[R, P]) doRequest(ctx context.Context, api *API) (R, erro
 
 				// Apply cooldown to global or chat-specific limiter
 				if api.Limiter != nil {
-					if r.chatID > 0 {
+					if r.chatID != 0 {
 						api.Limiter.SetChatLock(r.chatID, after)
 					} else {
 						api.Limiter.SetGlobalLock(after)
@@ -279,12 +312,16 @@ func (r TelegramRequest[R, P]) doRequest(ctx context.Context, api *API) (R, erro
 				if r.method == "getUpdates" {
 					return zero, responseErr
 				}
+				if retries >= api.maxRetries {
+					return zero, fmt.Errorf("%w after %d retries: %w", ErrRetryLimit, retries, responseErr)
+				}
+				retries++
 
 				// Wait and retry
 				select {
 				case <-ctx.Done():
 					return zero, ctx.Err()
-				case <-time.After(time.Duration(after) * time.Second):
+				case <-time.After(retryDelay(after)):
 					continue // retry request
 				}
 			}
@@ -330,8 +367,22 @@ func (r TelegramRequest[R, P]) Do(api *API) (R, error) {
 }
 
 func readBody(body io.ReadCloser) ([]byte, error) {
-	reader := io.LimitReader(body, 10<<20) // 10 MB
-	return io.ReadAll(reader)
+	data, err := io.ReadAll(io.LimitReader(body, maximumResponseSize+1))
+	if err != nil {
+		return nil, err
+	}
+	if len(data) > maximumResponseSize {
+		return nil, ErrResponseTooLarge
+	}
+	return data, nil
+}
+
+func retryDelay(retryAfter int) time.Duration {
+	delay := time.Duration(retryAfter) * time.Second
+	if delay < minimumRetryDelay {
+		return minimumRetryDelay
+	}
+	return delay
 }
 
 func parseBody[R any](data []byte) (TelegramResponse[R], error) {

tgapi/api101_test.go

@@ -0,0 +1,209 @@
+package tgapi
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+)
+
+func TestEditMessageTextMarshalsInputRichMessage(t *testing.T) {
+	params := EditMessageText{
+		ChatID:    1,
+		MessageID: 2,
+		RichMessage: &InputRichMessage{
+			HTML:                "<p>hi</p>",
+			SkipEntityDetection: true,
+		},
+	}
+	data, err := json.Marshal(params)
+	if err != nil {
+		t.Fatalf("Marshal returned error: %v", err)
+	}
+	got := string(data)
+	for _, want := range []string{`"rich_message":{"html":`, `"skip_entity_detection":true`} {
+		if !strings.Contains(got, want) {
+			t.Fatalf("missing %s in editMessageText JSON: %s", want, got)
+		}
+	}
+	if strings.Contains(got, `"blocks"`) {
+		t.Fatalf("rich_message must be an InputRichMessage, not a block tree: %s", got)
+	}
+	if strings.Contains(got, `"text"`) {
+		t.Fatalf("empty text must be omitted when editing rich content: %s", got)
+	}
+}
+
+func TestSendRichMessageDraftMarshal(t *testing.T) {
+	params := SendRichMessageDraft{
+		ChatID:      1,
+		DraftID:     7,
+		RichMessage: InputRichMessage{Markdown: "*hi*"},
+	}
+	data, err := json.Marshal(params)
+	if err != nil {
+		t.Fatalf("Marshal returned error: %v", err)
+	}
+	got := string(data)
+	for _, want := range []string{`"chat_id":1`, `"draft_id":7`, `"rich_message":{"markdown":"*hi*"}`} {
+		if !strings.Contains(got, want) {
+			t.Fatalf("missing %s in sendRichMessageDraft JSON: %s", want, got)
+		}
+	}
+}
+
+func TestInputRichMessageContentMarshal(t *testing.T) {
+	content := InputRichMessageContent{
+		RichMessage: InputRichMessage{HTML: "<p>hi</p>"},
+	}
+	data, err := json.Marshal(content)
+	if err != nil {
+		t.Fatalf("Marshal returned error: %v", err)
+	}
+	if got := string(data); !strings.Contains(got, `"rich_message":{"html":`) {
+		t.Fatalf("unexpected InputRichMessageContent JSON: %s", got)
+	}
+}
+
+func TestInputRichMessageMediaMarshal(t *testing.T) {
+	message := InputRichMessage{
+		HTML: `<video src="tg://video?id=intro"></video>`,
+		Media: []InputRichMessageMedia{{
+			ID:    "intro",
+			Media: InputMedia{Type: InputMediaTypeVideo, Media: "attach://intro"},
+		}},
+	}
+	data, err := json.Marshal(message)
+	if err != nil {
+		t.Fatalf("Marshal returned error: %v", err)
+	}
+
+	var got struct {
+		Media []struct {
+			ID    string     `json:"id"`
+			Media InputMedia `json:"media"`
+		} `json:"media"`
+	}
+	if err := json.Unmarshal(data, &got); err != nil {
+		t.Fatalf("Unmarshal returned error: %v", err)
+	}
+	if len(got.Media) != 1 || got.Media[0].ID != "intro" {
+		t.Fatalf("unexpected media: %+v", got.Media)
+	}
+	if got.Media[0].Media.Type != InputMediaTypeVideo || got.Media[0].Media.Media != "attach://intro" {
+		t.Fatalf("unexpected embedded media: %+v", got.Media[0].Media)
+	}
+}
+
+func TestEphemeralMethodsMarshalReceiverUserID(t *testing.T) {
+	cases := []struct {
+		name   string
+		params any
+	}{
+		{"edit text", EditEphemeralMessageText{ChatID: 1, ReceiverUserID: 2, EphemeralMessageID: 3, Text: "updated"}},
+		{"edit media", EditEphemeralMessageMedia{ChatID: 1, ReceiverUserID: 2, EphemeralMessageID: 3, Media: InputMedia{Type: InputMediaTypePhoto, Media: "photo-id"}}},
+		{"edit caption", EditEphemeralMessageCaption{ChatID: 1, ReceiverUserID: 2, EphemeralMessageID: 3, Caption: "updated"}},
+		{"edit markup", EditEphemeralMessageReplyMarkup{ChatID: 1, ReceiverUserID: 2, EphemeralMessageID: 3}},
+		{"delete", DeleteEphemeralMessage{ChatID: 1, ReceiverUserID: 2, EphemeralMessageID: 3}},
+	}
+
+	for _, tt := range cases {
+		t.Run(tt.name, func(t *testing.T) {
+			data, err := json.Marshal(tt.params)
+			if err != nil {
+				t.Fatalf("Marshal returned error: %v", err)
+			}
+			var fields map[string]json.RawMessage
+			if err := json.Unmarshal(data, &fields); err != nil {
+				t.Fatalf("Unmarshal returned error: %v", err)
+			}
+			if _, ok := fields["receiver_user_id"]; !ok {
+				t.Fatalf("receiver_user_id is missing from %s", data)
+			}
+			if _, ok := fields["reciever_user_id"]; ok {
+				t.Fatalf("misspelled receiver_user_id is present in %s", data)
+			}
+		})
+	}
+}
+
+func TestEphemeralSendParametersMarshal(t *testing.T) {
+	cases := []struct {
+		name   string
+		params any
+	}{
+		{"message", SendMessage{ChatID: 1, Text: "text", ReceiverUserID: 2, CallbackQueryID: "callback"}},
+		{"animation", SendAnimation{ChatID: 1, Animation: "animation", ReceiverUserID: 2, CallbackQueryID: "callback"}},
+		{"audio", SendAudio{ChatID: 1, Audio: "audio", ReceiverUserID: 2, CallbackQueryID: "callback"}},
+		{"document", SendDocument{ChatID: 1, Document: "document", ReceiverUserID: 2, CallbackQueryID: "callback"}},
+		{"photo", SendPhoto{ChatID: 1, Photo: "photo", ReceiverUserID: 2, CallbackQueryID: "callback"}},
+		{"sticker", SendSticker{ChatID: 1, Sticker: "sticker", ReceiverUserID: 2, CallbackQueryID: "callback"}},
+		{"video", SendVideo{ChatID: 1, Video: "video", ReceiverUserID: 2, CallbackQueryID: "callback"}},
+		{"video note", SendVideoNote{ChatID: 1, VideoNote: "video-note", ReceiverUserID: 2, CallbackQueryID: "callback"}},
+		{"voice", SendVoice{ChatID: 1, Voice: "voice", ReceiverUserID: 2, CallbackQueryID: "callback"}},
+		{"contact", SendContact{ChatID: 1, PhoneNumber: "+10000000000", FirstName: "A", ReceiverUserID: 2, CallbackQueryID: "callback"}},
+		{"location", SendLocation{ChatID: 1, Latitude: 1, Longitude: 2, ReceiverUserID: 2, CallbackQueryID: "callback"}},
+		{"venue", SendVenue{ChatID: 1, Latitude: 1, Longitude: 2, Title: "Venue", Address: "Address", ReceiverUserID: 2, CallbackQueryID: "callback"}},
+	}
+
+	for _, tt := range cases {
+		t.Run(tt.name, func(t *testing.T) {
+			data, err := json.Marshal(tt.params)
+			if err != nil {
+				t.Fatalf("Marshal returned error: %v", err)
+			}
+			if !strings.Contains(string(data), `"receiver_user_id":2`) || !strings.Contains(string(data), `"callback_query_id":"callback"`) {
+				t.Fatalf("missing ephemeral parameters in %s", data)
+			}
+		})
+	}
+}
+
+func TestInputPollOptionMediaLinkMarshal(t *testing.T) {
+	media := InputPollOptionMedia{Type: "link", URL: "https://example.com"}
+	data, err := json.Marshal(media)
+	if err != nil {
+		t.Fatalf("Marshal returned error: %v", err)
+	}
+	got := string(data)
+	if got != `{"type":"link","url":"https://example.com"}` {
+		t.Fatalf("unexpected link media JSON: %s", got)
+	}
+}
+
+func TestPollMediaUnmarshalLink(t *testing.T) {
+	var media PollMedia
+	if err := json.Unmarshal([]byte(`{"link":{"url":"https://example.com"}}`), &media); err != nil {
+		t.Fatalf("Unmarshal returned error: %v", err)
+	}
+	if media.Link == nil || media.Link.URL != "https://example.com" {
+		t.Fatalf("unexpected poll media link: %+v", media.Link)
+	}
+}
+
+func TestChatJoinRequestUnmarshalQueryID(t *testing.T) {
+	payload := `{"chat":{"id":1},"from":{"id":2,"first_name":"A"},"user_chat_id":2,"date":3,"query_id":"q42"}`
+	var req ChatJoinRequest
+	if err := json.Unmarshal([]byte(payload), &req); err != nil {
+		t.Fatalf("Unmarshal returned error: %v", err)
+	}
+	if req.QueryID == nil || *req.QueryID != "q42" {
+		t.Fatalf("unexpected query_id: %+v", req.QueryID)
+	}
+}
+
+func TestAnswerChatJoinRequestQueryResultValues(t *testing.T) {
+	if JoinRequestApprove != "approve" || JoinRequestDecline != "decline" || JoinRequestQueue != "queue" {
+		t.Fatalf("unexpected join request query result values: %q %q %q",
+			JoinRequestApprove, JoinRequestDecline, JoinRequestQueue)
+	}
+}
+
+func TestUserUnmarshalSupportsJoinRequestQueries(t *testing.T) {
+	var user User
+	if err := json.Unmarshal([]byte(`{"id":1,"first_name":"A","supports_join_request_queries":true}`), &user); err != nil {
+		t.Fatalf("Unmarshal returned error: %v", err)
+	}
+	if user.SupportsJoinRequestQueries == nil || !*user.SupportsJoinRequestQueries {
+		t.Fatalf("unexpected supports_join_request_queries: %+v", user.SupportsJoinRequestQueries)
+	}
+}

tgapi/api_test.go

@@ -1,6 +1,7 @@
 package tgapi
 
 import (
+	"errors"
 	"io"
 	"net/http"
 	"strings"
@@ -88,3 +89,42 @@ func TestAPICloseClosesIdleConnections(t *testing.T) {
 		t.Fatal("expected Close to close idle HTTP connections")
 	}
 }
+
+func TestAPIStopsAfterConfiguredRetryLimit(t *testing.T) {
+	calls := 0
+	client := &http.Client{Transport: roundTripFunc(func(_ *http.Request) (*http.Response, error) {
+		calls++
+		return &http.Response{
+			StatusCode: http.StatusOK,
+			Body: io.NopCloser(strings.NewReader(
+				`{"ok":false,"error_code":429,"description":"retry","parameters":{"retry_after":0}}`,
+			)),
+		}, nil
+	})}
+
+	api := NewAPI(NewAPIOpts("token").
+		SetAPIURL("https://example.test").
+		SetHTTPClient(client).
+		SetMaxRetries(2))
+	defer func() { _ = api.Close() }()
+
+	_, err := api.GetMe()
+	if !errors.Is(err, ErrRetryLimit) {
+		t.Fatalf("expected ErrRetryLimit, got %v", err)
+	}
+	var responseErr *ResponseError
+	if !errors.As(err, &responseErr) || responseErr.Code != http.StatusTooManyRequests {
+		t.Fatalf("expected wrapped 429 ResponseError, got %v", err)
+	}
+	if calls != 3 {
+		t.Fatalf("request count = %d, want 3", calls)
+	}
+}
+
+func TestReadBodyRejectsOversizedResponse(t *testing.T) {
+	body := io.NopCloser(io.LimitReader(strings.NewReader(strings.Repeat("x", maximumResponseSize+1)), maximumResponseSize+1))
+	_, err := readBody(body)
+	if !errors.Is(err, ErrResponseTooLarge) {
+		t.Fatalf("expected ErrResponseTooLarge, got %v", err)
+	}
+}

tgapi/attachments_methods.go

@@ -6,26 +6,65 @@ import "context"
 // Since: Bot API 1.0
 // See https://core.telegram.org/bots/api#sendphoto
 type SendPhoto struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
-	Photo           string          `json:"photo"`
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// Photo Required. Photo to send. Pass a file_id as String to send a photo that exists on the Telegram
+	// servers (recommended), pass an HTTP URL as a String for Telegram to get a photo from the Internet, or
+	// upload a new photo using multipart/form-data. The photo must be at most 10 MB in size. The photo's width
+	// and height must not exceed 10000 in total. Width and height ratio must be at most 20. More information on
+	// Sending Files »
+	Photo string `json:"photo"`
+	// Caption Optional. Photo caption (may also be used when resending photos by file_id), 0-1024 characters
+	// after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the photo caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
 
-	ShowCaptionAboveMedia bool   `json:"show_caption_above_media,omitempty"`
-	HasSpoiler            bool   `json:"has_spoiler,omitempty"`
-	DisableNotifications  bool   `json:"disable_notification,omitempty"`
-	ProtectContent        bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast    bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID       string `json:"message_effect_id,omitempty"`
+	// ShowCaptionAboveMedia Optional. Pass True if the caption must be shown above the message media
+	ShowCaptionAboveMedia bool `json:"show_caption_above_media,omitempty"`
+	// HasSpoiler Optional. Pass True if the photo needs to be covered with a spoiler animation
+	HasSpoiler bool `json:"has_spoiler,omitempty"`
+	// DisableNotifications Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotifications bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendPhoto sends a photo.
@@ -49,28 +88,71 @@ func (api *API) SendPhotoWithContext(ctx context.Context, params SendPhoto) (Mes
 // Since: Bot API 1.2
 // See https://core.telegram.org/bots/api#sendaudio
 type SendAudio struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
-	Audio           string          `json:"audio"`
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// Audio Required. Audio file to send. Pass a file_id as String to send an audio file that exists on the
+	// Telegram servers (recommended), pass an HTTP URL as a String for Telegram to get an audio file from the
+	// Internet, or upload a new one using multipart/form-data. More information on Sending Files »
+	Audio string `json:"audio"`
+	// Caption Optional. Audio caption, 0-1024 characters after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the audio caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
-	Duration        int             `json:"duration,omitempty"`
-	Performer       string          `json:"performer,omitempty"`
-	Title           string          `json:"title,omitempty"`
-	Thumbnail       string          `json:"thumbnail,omitempty"`
+	// Duration Optional. Duration of the audio in seconds
+	Duration int `json:"duration,omitempty"`
+	// Performer Optional. Performer
+	Performer string `json:"performer,omitempty"`
+	// Title Optional. Track name
+	Title string `json:"title,omitempty"`
+	// Thumbnail Optional. Thumbnail of the file sent; can be ignored if thumbnail generation for the file is
+	// supported server-side. The thumbnail should be in JPEG format and less than 200 kB in size. A thumbnail's
+	// width and height should not exceed 320. Ignored if the file is not uploaded using multipart/form-data.
+	// Thumbnails can't be reused and can be only uploaded as a new file, so you can pass
+	// “attach://<file_attach_name>” if the thumbnail was uploaded using multipart/form-data under
+	// <file_attach_name>. More information on Sending Files »
+	Thumbnail string `json:"thumbnail,omitempty"`
 
-	DisableNotification bool   `json:"disable_notification,omitempty"`
-	ProtectContent      bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast  bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID     string `json:"message_effect_id,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendAudio sends an audio file.
@@ -94,26 +176,69 @@ func (api *API) SendAudioWithContext(ctx context.Context, params SendAudio) (Mes
 // Since: Bot API 1.0
 // See https://core.telegram.org/bots/api#senddocument
 type SendDocument struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
-	Document                    string          `json:"document"`
-	Thumbnail                   string          `json:"thumbnail,omitempty"`
-	Caption                     string          `json:"caption,omitempty"`
-	ParseMode                   ParseMode       `json:"parse_mode,omitempty"`
-	CaptionEntities             []MessageEntity `json:"caption_entities,omitempty"`
-	DisableContentTypeDetection bool            `json:"disable_content_type_detection,omitempty"`
+	// Document Required. File to send. Pass a file_id as String to send a file that exists on the Telegram
+	// servers (recommended), pass an HTTP URL as a String for Telegram to get a file from the Internet, or
+	// upload a new one using multipart/form-data. More information on Sending Files »
+	Document string `json:"document"`
+	// Thumbnail Optional. Thumbnail of the file sent; can be ignored if thumbnail generation for the file is
+	// supported server-side. The thumbnail should be in JPEG format and less than 200 kB in size. A thumbnail's
+	// width and height should not exceed 320. Ignored if the file is not uploaded using multipart/form-data.
+	// Thumbnails can't be reused and can be only uploaded as a new file, so you can pass
+	// “attach://<file_attach_name>” if the thumbnail was uploaded using multipart/form-data under
+	// <file_attach_name>. More information on Sending Files »
+	Thumbnail string `json:"thumbnail,omitempty"`
+	// Caption Optional. Document caption (may also be used when resending documents by file_id), 0-1024
+	// characters after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the document caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
+	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
+	// DisableContentTypeDetection Optional. Disables automatic server-side content type detection for files
+	// uploaded using multipart/form-data
+	DisableContentTypeDetection bool `json:"disable_content_type_detection,omitempty"`
 
-	DisableNotification bool   `json:"disable_notification,omitempty"`
-	ProtectContent      bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast  bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID     string `json:"message_effect_id,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendDocument sends a document.
@@ -137,34 +262,86 @@ func (api *API) SendDocumentWithContext(ctx context.Context, params SendDocument
 // Since: Bot API 1.0
 // See https://core.telegram.org/bots/api#sendvideo
 type SendVideo struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
-	Video     string `json:"video"`
+	// Video Required. Video to send. Pass a file_id as String to send a video that exists on the Telegram
+	// servers (recommended), pass an HTTP URL as a String for Telegram to get a video from the Internet, or
+	// upload a new video using multipart/form-data. More information on Sending Files »
+	Video string `json:"video"`
+	// Thumbnail Optional. Thumbnail of the file sent; can be ignored if thumbnail generation for the file is
+	// supported server-side. The thumbnail should be in JPEG format and less than 200 kB in size. A thumbnail's
+	// width and height should not exceed 320. Ignored if the file is not uploaded using multipart/form-data.
+	// Thumbnails can't be reused and can be only uploaded as a new file, so you can pass
+	// “attach://<file_attach_name>” if the thumbnail was uploaded using multipart/form-data under
+	// <file_attach_name>. More information on Sending Files »
 	Thumbnail string `json:"thumbnail,omitempty"`
-	Duration  int    `json:"duration,omitempty"`
-	Width     int    `json:"width,omitempty"`
-	Height    int    `json:"height,omitempty"`
-	Cover     string `json:"cover,omitempty"`
+	// Duration Optional. Duration of sent video in seconds
+	Duration int `json:"duration,omitempty"`
+	// Width Optional. Video width
+	Width int `json:"width,omitempty"`
+	// Height Optional. Video height
+	Height int `json:"height,omitempty"`
+	// Cover Optional. Cover for the video in the message. Pass a file_id to send a file that exists on the
+	// Telegram servers (recommended), pass an HTTP URL for Telegram to get a file from the Internet, or pass
+	// “attach://<file_attach_name>” to upload a new one using multipart/form-data under <file_attach_name>
+	// name. More information on Sending Files »
+	Cover string `json:"cover,omitempty"`
 
-	StartTimestamp  int             `json:"start_timestamp,omitempty"`
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// StartTimestamp Optional. Start timestamp for the video in the message
+	StartTimestamp int `json:"start_timestamp,omitempty"`
+	// Caption Optional. Video caption (may also be used when resending videos by file_id), 0-1024 characters
+	// after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the video caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
 
-	ShowCaptionAboveMedia bool   `json:"show_caption_above_media,omitempty"`
-	HasSpoiler            bool   `json:"has_spoiler,omitempty"`
-	SupportsStreaming     bool   `json:"supports_streaming,omitempty"`
-	DisableNotification   bool   `json:"disable_notification,omitempty"`
-	ProtectContent        bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast    bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID       string `json:"message_effect_id,omitempty"`
+	// ShowCaptionAboveMedia Optional. Pass True if the caption must be shown above the message media
+	ShowCaptionAboveMedia bool `json:"show_caption_above_media,omitempty"`
+	// HasSpoiler Optional. Pass True if the video needs to be covered with a spoiler animation
+	HasSpoiler bool `json:"has_spoiler,omitempty"`
+	// SupportsStreaming Optional. Pass True if the uploaded video is suitable for streaming
+	SupportsStreaming bool `json:"supports_streaming,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendVideo sends a video.
@@ -188,30 +365,76 @@ func (api *API) SendVideoWithContext(ctx context.Context, params SendVideo) (Mes
 // Since: Bot API 4.0
 // See https://core.telegram.org/bots/api#sendanimation
 type SendAnimation struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
+	// Animation Required. Animation to send. Pass a file_id as String to send an animation that exists on the
+	// Telegram servers (recommended), pass an HTTP URL as a String for Telegram to get an animation from the
+	// Internet, or upload a new animation using multipart/form-data. More information on Sending Files »
 	Animation string `json:"animation"`
+	// Thumbnail Optional. Thumbnail of the file sent; can be ignored if thumbnail generation for the file is
+	// supported server-side. The thumbnail should be in JPEG format and less than 200 kB in size. A thumbnail's
+	// width and height should not exceed 320. Ignored if the file is not uploaded using multipart/form-data.
+	// Thumbnails can't be reused and can be only uploaded as a new file, so you can pass
+	// “attach://<file_attach_name>” if the thumbnail was uploaded using multipart/form-data under
+	// <file_attach_name>. More information on Sending Files »
 	Thumbnail string `json:"thumbnail,omitempty"`
-	Duration  int    `json:"duration,omitempty"`
-	Width     int    `json:"width,omitempty"`
-	Height    int    `json:"height,omitempty"`
+	// Duration Optional. Duration of sent animation in seconds
+	Duration int `json:"duration,omitempty"`
+	// Width Optional. Animation width
+	Width int `json:"width,omitempty"`
+	// Height Optional. Animation height
+	Height int `json:"height,omitempty"`
 
-	Caption               string          `json:"caption,omitempty"`
-	ParseMode             ParseMode       `json:"parse_mode,omitempty"`
-	CaptionEntities       []MessageEntity `json:"caption_entities,omitempty"`
-	ShowCaptionAboveMedia bool            `json:"show_caption_above_media,omitempty"`
-	HasSpoiler            bool            `json:"has_spoiler,omitempty"`
-	DisableNotification   bool            `json:"disable_notification,omitempty"`
-	ProtectContent        bool            `json:"protect_content,omitempty"`
-	AllowPaidBroadcast    bool            `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID       string          `json:"message_effect_id,omitempty"`
+	// Caption Optional. Animation caption (may also be used when resending animation by file_id), 0-1024
+	// characters after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the animation caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
+	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
+	// ShowCaptionAboveMedia Optional. Pass True if the caption must be shown above the message media
+	ShowCaptionAboveMedia bool `json:"show_caption_above_media,omitempty"`
+	// HasSpoiler Optional. Pass True if the animation needs to be covered with a spoiler animation
+	HasSpoiler bool `json:"has_spoiler,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendAnimation sends an animation file (GIF or H.264/MPEG-4 AVC video without sound).
@@ -235,24 +458,59 @@ func (api *API) SendAnimationWithContext(ctx context.Context, params SendAnimati
 // Since: Bot API 1.2
 // See https://core.telegram.org/bots/api#sendvoice
 type SendVoice struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
-	Voice               string          `json:"voice"`
-	Caption             string          `json:"caption,omitempty"`
-	ParseMode           ParseMode       `json:"parse_mode,omitempty"`
-	CaptionEntities     []MessageEntity `json:"caption_entities,omitempty"`
-	Duration            int             `json:"duration,omitempty"`
-	DisableNotification bool            `json:"disable_notification,omitempty"`
-	ProtectContent      bool            `json:"protect_content,omitempty"`
-	AllowPaidBroadcast  bool            `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID     string          `json:"message_effect_id,omitempty"`
+	// Voice Required. Audio file to send. Pass a file_id as String to send a file that exists on the Telegram
+	// servers (recommended), pass an HTTP URL as a String for Telegram to get a file from the Internet, or
+	// upload a new one using multipart/form-data. More information on Sending Files »
+	Voice string `json:"voice"`
+	// Caption Optional. Voice message caption, 0-1024 characters after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the voice message caption. See formatting options for
+	// more details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
+	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
+	// Duration Optional. Duration of the voice message in seconds
+	Duration int `json:"duration,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendVoice sends a voice note.
@@ -276,23 +534,60 @@ func (api *API) SendVoiceWithContext(ctx context.Context, params SendVoice) (Mes
 // Since: Bot API 3.0
 // See https://core.telegram.org/bots/api#sendvideonote
 type SendVideoNote struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
-	VideoNote           string `json:"video_note"`
-	Thumbnail           string `json:"thumbnail,omitempty"`
-	Duration            int    `json:"duration,omitempty"`
-	Length              int    `json:"length,omitempty"`
-	DisableNotification bool   `json:"disable_notification,omitempty"`
-	ProtectContent      bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast  bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID     string `json:"message_effect_id,omitempty"`
+	// VideoNote Required. Video note to send. Pass a file_id as String to send a video note that exists on the
+	// Telegram servers (recommended) or upload a new video using multipart/form-data. More information on
+	// Sending Files ». Sending video notes by a URL is currently unsupported.
+	VideoNote string `json:"video_note"`
+	// Thumbnail Optional. Thumbnail of the file sent; can be ignored if thumbnail generation for the file is
+	// supported server-side. The thumbnail should be in JPEG format and less than 200 kB in size. A thumbnail's
+	// width and height should not exceed 320. Ignored if the file is not uploaded using multipart/form-data.
+	// Thumbnails can't be reused and can be only uploaded as a new file, so you can pass
+	// “attach://<file_attach_name>” if the thumbnail was uploaded using multipart/form-data under
+	// <file_attach_name>. More information on Sending Files »
+	Thumbnail string `json:"thumbnail,omitempty"`
+	// Duration Optional. Duration of sent video in seconds
+	Duration int `json:"duration,omitempty"`
+	// Length Optional. Video width and height, i.e. diameter of the video message
+	Length int `json:"length,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendVideoNote sends a video note (rounded video message).
@@ -316,25 +611,56 @@ func (api *API) SendVideoNoteWithContext(ctx context.Context, params SendVideoNo
 // Since: Bot API 7.6
 // See https://core.telegram.org/bots/api#sendpaidmedia
 type SendPaidMedia struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
-	StarCount             int    `json:"star_count,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username. If the chat is a channel, all Telegram Star proceeds from this media
+	// will be credited to the chat's balance. Otherwise, they will be credited to the bot's balance.
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// StarCount Required. The number of Telegram Stars that must be paid to buy access to the media; 1-25000
+	StarCount int `json:"star_count,omitempty"`
 
-	Media                 []InputPaidMedia `json:"media"`
-	Payload               string           `json:"payload,omitempty"`
-	Caption               string           `json:"caption,omitempty"`
-	ParseMode             ParseMode        `json:"parse_mode,omitempty"`
-	CaptionEntities       []MessageEntity  `json:"caption_entities,omitempty"`
-	ShowCaptionAboveMedia bool             `json:"show_caption_above_media,omitempty"`
-	DisableNotification   bool             `json:"disable_notification,omitempty"`
-	ProtectContent        bool             `json:"protect_content,omitempty"`
-	AllowPaidBroadcast    bool             `json:"allow_paid_broadcast,omitempty"`
+	// Media Required. A JSON-serialized Array describing the media to be sent; up to 10 items
+	Media []InputPaidMedia `json:"media"`
+	// Payload Optional. Bot-defined paid media payload, 0-128 bytes. This will not be displayed to the user,
+	// use it for your internal processes.
+	Payload string `json:"payload,omitempty"`
+	// Caption Optional. Media caption, 0-1024 characters after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the media caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
+	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
+	// ShowCaptionAboveMedia Optional. Pass True if the caption must be shown above the message media
+	ShowCaptionAboveMedia bool `json:"show_caption_above_media,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendPaidMedia sends paid media.
@@ -358,17 +684,34 @@ func (api *API) SendPaidMediaWithContext(ctx context.Context, params SendPaidMed
 // Since: Bot API 3.5
 // See https://core.telegram.org/bots/api#sendmediagroup
 type SendMediaGroup struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the messages will be
+	// sent; required if the messages are sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
 
-	Media               []InputMedia     `json:"media"`
-	DisableNotification bool             `json:"disable_notification,omitempty"`
-	ProtectContent      bool             `json:"protect_content,omitempty"`
-	AllowPaidBroadcast  bool             `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID     string           `json:"message_effect_id,omitempty"`
-	ReplyParameters     *ReplyParameters `json:"reply_parameters,omitempty"`
+	// Media Required. A JSON-serialized Array describing messages to be sent, must include 2-10 items
+	Media []InputMedia `json:"media"`
+	// DisableNotification Optional. Sends messages silently. Users will receive a notification with no sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent messages from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
 }
 
 // SendMediaGroup sends a group of photos, videos, documents or audios as an album.
@@ -392,26 +735,66 @@ func (api *API) SendMediaGroupWithContext(ctx context.Context, params SendMediaG
 // Since: Bot API 10.0
 // See https://core.telegram.org/bots/api#sendlivephoto
 type SendLivePhoto struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel (in the format
+	// @channelusername)
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
 
-	LivePhoto       string          `json:"live_photo"`
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
+	// LivePhoto Required. Live photo video to send. The video must be no longer than 10 seconds and must not
+	// exceed 10 MB in size. Pass a file_id as String to send a video that exists on the Telegram servers
+	// (recommended) or upload a new video using multipart/form-data. More information on Sending Files ».
+	// Sending live photos by a URL is currently unsupported.
+	LivePhoto string `json:"live_photo"`
+	// Photo contains or identifies the associated photo.
+	Photo string `json:"photo"`
+	// Caption Optional. Video caption (may also be used when resending videos by file_id), 0-1024 characters
+	// after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the video caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
 
-	ShowCaptionAboveMedia bool   `json:"show_caption_above_media,omitempty"`
-	HasSpoiler            bool   `json:"has_spoiler,omitempty"`
-	DisableNotification   bool   `json:"disable_notification,omitempty"`
-	ProtectContent        bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast    bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID       string `json:"message_effect_id,omitempty"`
+	// ShowCaptionAboveMedia Optional. Pass True if the caption must be shown above the message media
+	ShowCaptionAboveMedia bool `json:"show_caption_above_media,omitempty"`
+	// HasSpoiler Optional. Pass True if the video needs to be covered with a spoiler animation
+	HasSpoiler bool `json:"has_spoiler,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendLivePhoto sends a live photo.

tgapi/attachments_types.go

@@ -3,107 +3,183 @@ package tgapi
 // Animation represents an animation file (GIF or H.264/MPEG-4 AVC without sound).
 // Since: Bot API 4.0
 type Animation struct {
-	FileID       string `json:"file_id"`
+	// FileID Identifier for this file, which can be used to download or reuse the file
+	FileID string `json:"file_id"`
+	// FileUniqueID Unique identifier for this file, which is supposed to be the same over time and for
+	// different bots. Can't be used to download or reuse the file.
 	FileUniqueID string `json:"file_unique_id"`
-	Width        int    `json:"width"`
-	Height       int    `json:"height"`
-	Duration     int    `json:"duration"`
+	// Width Video width as defined by the sender
+	Width int `json:"width"`
+	// Height Video height as defined by the sender
+	Height int `json:"height"`
+	// Duration Duration of the video in seconds as defined by the sender
+	Duration int `json:"duration"`
 
+	// Thumbnail Optional. Animation thumbnail as defined by the sender
 	Thumbnail *PhotoSize `json:"thumbnail,omitempty"`
-	FileName  string     `json:"file_name"`
-	MimeType  string     `json:"mime_type"`
-	FileSize  int        `json:"file_size"`
+	// FileName Optional. Original animation filename as defined by the sender
+	FileName string `json:"file_name"`
+	// MimeType Optional. MIME type of the file as defined by the sender
+	MimeType string `json:"mime_type"`
+	// FileSize Optional. File size in bytes. It can be bigger than 2^31 and some programming languages may have
+	// difficulty/silent defects in interpreting it. But it has at most 52 significant bits, so a signed 64-bit
+	// integer or double-precision float type are safe for storing this value.
+	FileSize int `json:"file_size"`
 }
 
 // Audio represents an audio file to be treated as music by the Telegram clients.
 // Since: Bot API 1.2
 // See https://core.telegram.org/bots/api#audio
 type Audio struct {
-	FileID       string `json:"file_id"`
+	// FileID Identifier for this file, which can be used to download or reuse the file
+	FileID string `json:"file_id"`
+	// FileUniqueID Unique identifier for this file, which is supposed to be the same over time and for
+	// different bots. Can't be used to download or reuse the file.
 	FileUniqueID string `json:"file_unique_id"`
-	Duration     int    `json:"duration"`
+	// Duration Duration of the audio in seconds as defined by the sender
+	Duration int `json:"duration"`
 
-	Performer string     `json:"performer,omitempty"`
-	Title     string     `json:"title,omitempty"`
-	FileName  string     `json:"file_name,omitempty"` // Since: Bot API 5.0
-	MimeType  string     `json:"mime_type,omitempty"`
-	FileSize  int64      `json:"file_size,omitempty"`
+	// Performer Optional. Performer of the audio as defined by the sender or by audio tags
+	Performer string `json:"performer,omitempty"`
+	// Title Optional. Title of the audio as defined by the sender or by audio tags
+	Title string `json:"title,omitempty"`
+	// FileName Optional. Original filename as defined by the sender
+	FileName string `json:"file_name,omitempty"` // Since: Bot API 5.0
+	// MimeType Optional. MIME type of the file as defined by the sender
+	MimeType string `json:"mime_type,omitempty"`
+	// FileSize Optional. File size in bytes. It can be bigger than 2^31 and some programming languages may have
+	// difficulty/silent defects in interpreting it. But it has at most 52 significant bits, so a signed 64-bit
+	// integer or double-precision float type are safe for storing this value.
+	FileSize int64 `json:"file_size,omitempty"`
+	// Thumbnail Optional. Thumbnail of the album cover to which the music file belongs
 	Thumbnail *PhotoSize `json:"thumbnail,omitempty"`
 }
 
 // Document represents a general file (as opposed to photos, voice messages and audio files).
 // Since: Bot API 1.0
 type Document struct {
-	FileID       string     `json:"file_id"`
-	FileUniqueID string     `json:"file_unique_id"`
-	Thumbnail    *PhotoSize `json:"thumbnail,omitempty"`
-	FileName     string     `json:"file_name"`
-	MimeType     string     `json:"mime_type"`
-	FileSize     int        `json:"file_size,omitempty"`
+	// FileID Identifier for this file, which can be used to download or reuse the file
+	FileID string `json:"file_id"`
+	// FileUniqueID Unique identifier for this file, which is supposed to be the same over time and for
+	// different bots. Can't be used to download or reuse the file.
+	FileUniqueID string `json:"file_unique_id"`
+	// Thumbnail Optional. Document thumbnail as defined by the sender
+	Thumbnail *PhotoSize `json:"thumbnail,omitempty"`
+	// FileName Optional. Original filename as defined by the sender
+	FileName string `json:"file_name"`
+	// MimeType Optional. MIME type of the file as defined by the sender
+	MimeType string `json:"mime_type"`
+	// FileSize Optional. File size in bytes. It can be bigger than 2^31 and some programming languages may have
+	// difficulty/silent defects in interpreting it. But it has at most 52 significant bits, so a signed 64-bit
+	// integer or double-precision float type are safe for storing this value.
+	FileSize int `json:"file_size,omitempty"`
 }
 
 // Story represents a story.
 // Since: Bot API 6.8
 type Story struct {
+	// Chat Chat that posted the story
 	Chat Chat `json:"chat"`
-	ID   int  `json:"id"`
+	// ID Unique identifier for the story in the chat
+	ID int `json:"id"`
 }
 
 // Video represents a video file.
 // Since: Bot API 1.0
 type Video struct {
-	FileID       string `json:"file_id"`
+	// FileID Identifier for this file, which can be used to download or reuse the file
+	FileID string `json:"file_id"`
+	// FileUniqueID Unique identifier for this file, which is supposed to be the same over time and for
+	// different bots. Can't be used to download or reuse the file.
 	FileUniqueID string `json:"file_unique_id"`
-	Width        int    `json:"width"`
-	Height       int    `json:"height"`
-	Duration     int    `json:"duration"`
+	// Width Video width as defined by the sender
+	Width int `json:"width"`
+	// Height Video height as defined by the sender
+	Height int `json:"height"`
+	// Duration Duration of the video in seconds as defined by the sender
+	Duration int `json:"duration"`
 
-	Thumbnail      *PhotoSize     `json:"thumbnail,omitempty"`
-	Cover          []PhotoSize    `json:"cover,omitempty"`     // Since: Bot API 8.3
-	StartTimestamp int64          `json:"start_timestamp"`     // Since: Bot API 8.3
-	Qualities      []VideoQuality `json:"qualities,omitempty"` // Since: Bot API 9.4
-	FileName       string         `json:"file_name,omitempty"`
-	MimeType       string         `json:"mime_type,omitempty"`
-	FileSize       int64          `json:"file_size,omitempty"`
+	// Thumbnail Optional. Video thumbnail
+	Thumbnail *PhotoSize `json:"thumbnail,omitempty"`
+	// Cover Optional. Available sizes of the cover of the video in the message
+	Cover []PhotoSize `json:"cover,omitempty"` // Since: Bot API 8.3
+	// StartTimestamp Optional. Timestamp in seconds from which the video will play in the message
+	StartTimestamp int64 `json:"start_timestamp"` // Since: Bot API 8.3
+	// Qualities Optional. List of available qualities of the video
+	Qualities []VideoQuality `json:"qualities,omitempty"` // Since: Bot API 9.4
+	// FileName Optional. Original filename as defined by the sender
+	FileName string `json:"file_name,omitempty"`
+	// MimeType Optional. MIME type of the file as defined by the sender
+	MimeType string `json:"mime_type,omitempty"`
+	// FileSize Optional. File size in bytes. It can be bigger than 2^31 and some programming languages may have
+	// difficulty/silent defects in interpreting it. But it has at most 52 significant bits, so a signed 64-bit
+	// integer or double-precision float type are safe for storing this value.
+	FileSize int64 `json:"file_size,omitempty"`
 }
 
 // VideoQuality describes an alternative quality for a video.
 // Since: Bot API 9.4
 // See https://core.telegram.org/bots/api#videoquality
 type VideoQuality struct {
-	FileID       string `json:"file_id"`
+	// FileID Identifier for this file, which can be used to download or reuse the file
+	FileID string `json:"file_id"`
+	// FileUniqueID Unique identifier for this file, which is supposed to be the same over time and for
+	// different bots. Can't be used to download or reuse the file.
 	FileUniqueID string `json:"file_unique_id"`
-	Width        int    `json:"width"`
-	Height       int    `json:"height"`
-	Codec        string `json:"codec"`
-	FileSize     int64  `json:"file_size,omitempty"`
+	// Width Video width
+	Width int `json:"width"`
+	// Height Video height
+	Height int `json:"height"`
+	// Codec Codec that was used to encode the video, for example, “h264”, “h265”, or “av01”
+	Codec string `json:"codec"`
+	// FileSize Optional. File size in bytes. It can be bigger than 2^31 and some programming languages may have
+	// difficulty/silent defects in interpreting it. But it has at most 52 significant bits, so a signed 64-bit
+	// integer or double-precision float type are safe for storing this value.
+	FileSize int64 `json:"file_size,omitempty"`
 }
 
 // VideoNote represents a video message.
 // Since: Bot API 3.0
 type VideoNote struct {
-	FileID       string     `json:"file_id"`
-	FileUniqueID string     `json:"file_unique_id"`
-	Length       int        `json:"length"`
-	Duration     int        `json:"duration"`
-	Thumbnail    *PhotoSize `json:"thumbnail,omitempty"`
-	FileSize     int64      `json:"file_size,omitempty"`
+	// FileID Identifier for this file, which can be used to download or reuse the file
+	FileID string `json:"file_id"`
+	// FileUniqueID Unique identifier for this file, which is supposed to be the same over time and for
+	// different bots. Can't be used to download or reuse the file.
+	FileUniqueID string `json:"file_unique_id"`
+	// Length Video width and height (diameter of the video message) as defined by the sender
+	Length int `json:"length"`
+	// Duration Duration of the video in seconds as defined by the sender
+	Duration int `json:"duration"`
+	// Thumbnail Optional. Video thumbnail
+	Thumbnail *PhotoSize `json:"thumbnail,omitempty"`
+	// FileSize Optional. File size in bytes
+	FileSize int64 `json:"file_size,omitempty"`
 }
 
 // Voice represents a voice note.
 // Since: Bot API 1.2
 type Voice struct {
-	FileID       string `json:"file_id"`
+	// FileID Identifier for this file, which can be used to download or reuse the file
+	FileID string `json:"file_id"`
+	// FileUniqueID Unique identifier for this file, which is supposed to be the same over time and for
+	// different bots. Can't be used to download or reuse the file.
 	FileUniqueID string `json:"file_unique_id"`
-	Duration     int    `json:"duration"`
-	MimeType     string `json:"mime_type,omitempty"`
-	FileSize     int    `json:"file_size,omitempty"`
+	// Duration Duration of the audio in seconds as defined by the sender
+	Duration int `json:"duration"`
+	// MimeType Optional. MIME type of the file as defined by the sender
+	MimeType string `json:"mime_type,omitempty"`
+	// FileSize Optional. File size in bytes. It can be bigger than 2^31 and some programming languages may have
+	// difficulty/silent defects in interpreting it. But it has at most 52 significant bits, so a signed 64-bit
+	// integer or double-precision float type are safe for storing this value.
+	FileSize int `json:"file_size,omitempty"`
 }
 
 // PaidMediaInfo describes paid media.
 // Since: Bot API 7.6
 type PaidMediaInfo struct {
-	StarCount int         `json:"star_count"`
+	// StarCount The number of Telegram Stars that must be paid to buy access to the media
+	StarCount int `json:"star_count"`
+	// PaidMedia Information about the paid media
 	PaidMedia []PaidMedia `json:"paid_media"`
 }
 
@@ -112,101 +188,159 @@ type PaidMediaInfo struct {
 type PaidMediaType string
 
 const (
-	PaidMediaPreviewType   PaidMediaType = "preview"
-	PaidMediaPhotoType     PaidMediaType = "photo"
-	PaidMediaVideoType     PaidMediaType = "video"
+	// PaidMediaPreviewType identifies a paid-media preview.
+	PaidMediaPreviewType PaidMediaType = "preview"
+	// PaidMediaPhotoType identifies a paid photo.
+	PaidMediaPhotoType PaidMediaType = "photo"
+	// PaidMediaVideoType identifies a paid video.
+	PaidMediaVideoType PaidMediaType = "video"
+	// PaidMediaLivePhotoType identifies a paid live photo.
 	PaidMediaLivePhotoType PaidMediaType = "live_photo" // Since: Bot API 10.0
 )
 
 // PaidMedia describes paid media content.
 // Since: Bot API 7.6
 type PaidMedia struct {
+	// Type identifies the preview, photo, video, or live-photo variant.
 	Type PaidMediaType `json:"type,omitempty"`
 
-	Width    int `json:"width,omitempty"`
-	Height   int `json:"height,omitempty"`
+	// Width Optional. Media width as defined by the sender
+	Width int `json:"width,omitempty"`
+	// Height Optional. Media height as defined by the sender
+	Height int `json:"height,omitempty"`
+	// Duration Optional. Duration of the media in seconds as defined by the sender
 	Duration int `json:"duration,omitempty"`
 
+	// Photo The photo
 	Photo []PhotoSize `json:"photo,omitempty"`
 
-	Video     *Video     `json:"video,omitempty"`
+	// Video The video
+	Video *Video `json:"video,omitempty"`
+	// LivePhoto The photo
 	LivePhoto *LivePhoto `json:"live_photo,omitempty"` // Since: Bot API 10.0
 }
 
 // Contact represents a phone contact.
 // Since: Bot API 1.0
 type Contact struct {
+	// PhoneNumber Contact's phone number
 	PhoneNumber string `json:"phone_number"`
-	FirstName   string `json:"first_name"`
-	LastName    string `json:"last_name,omitempty"`
-	UserID      int64  `json:"user_id,omitempty"`
-	Vcard       string `json:"vcard,omitempty"`
+	// FirstName Contact's first name
+	FirstName string `json:"first_name"`
+	// LastName Optional. Contact's last name
+	LastName string `json:"last_name,omitempty"`
+	// UserID Optional. Contact's user identifier in Telegram. This number may have more than 32 significant
+	// bits and some programming languages may have difficulty/silent defects in interpreting it. But it has at
+	// most 52 significant bits, so a 64-bit integer or double-precision float type are safe for storing this
+	// identifier.
+	UserID int64 `json:"user_id,omitempty"`
+	// Vcard Optional. Additional data about the contact in the form of a vCard
+	Vcard string `json:"vcard,omitempty"`
 }
 
 // Dice represents an animated emoji with a random value.
 // Since: Bot API 4.7
 type Dice struct {
+	// Emoji Emoji on which the dice throw animation is based
 	Emoji string `json:"emoji"`
-	Value int    `json:"value"`
+	// Value Value of the dice, 1-6 for “”, “” and “” base emoji, 1-5 for “” and “” base
+	// emoji, 1-64 for “” base emoji
+	Value int `json:"value"`
 }
 
 // PollOption contains information about one answer option in a poll.
 // Since: Bot API 4.2
 // See https://core.telegram.org/bots/api#polloption
 type PollOption struct {
-	PersistentID string          `json:"persistent_id"` // Since: Bot API 9.6
-	Text         string          `json:"text"`
+	// PersistentID Unique identifier of the option, persistent on option addition and deletion
+	PersistentID string `json:"persistent_id"` // Since: Bot API 9.6
+	// Text Option text, 1-100 characters
+	Text string `json:"text"`
+	// TextEntities Optional. Special entities that appear in the option text. Currently, only custom emoji
+	// entities are allowed in poll option texts
 	TextEntities []MessageEntity `json:"text_entities"`
-	Media        *PollMedia      `json:"media,omitempty"` // Since: Bot API 10.0
-	VoterCount   int             `json:"voter_count"`
+	// Media Optional. Media added to the poll option
+	Media *PollMedia `json:"media,omitempty"` // Since: Bot API 10.0
+	// VoterCount Number of users who voted for this option; may be 0 if unknown
+	VoterCount int `json:"voter_count"`
 
-	AddedByUser  *User `json:"added_by_user,omitempty"` // Since: Bot API 9.6
-	AddedByChat  *Chat `json:"added_by_chat,omitempty"` // Since: Bot API 9.6
-	AdditionDate int   `json:"addition_date,omitempty"` // Since: Bot API 9.6
+	// AddedByUser Optional. User who added the option; omitted if the option wasn't added by a user after poll
+	// creation
+	AddedByUser *User `json:"added_by_user,omitempty"` // Since: Bot API 9.6
+	// AddedByChat Optional. Chat that added the option; omitted if the option wasn't added by a chat after poll
+	// creation
+	AddedByChat *Chat `json:"added_by_chat,omitempty"` // Since: Bot API 9.6
+	// AdditionDate Optional. Point in time (Unix timestamp) when the option was added; omitted if the option
+	// existed in the original poll
+	AdditionDate int `json:"addition_date,omitempty"` // Since: Bot API 9.6
 }
 
 // InputPollOptionMedia describes the media to attach to a poll option.
+// For type "link" set URL instead of Media.
 // Since: Bot API 10.0
 // See https://core.telegram.org/bots/api#inputpolloptionmedia
 type InputPollOptionMedia struct {
-	Type  string `json:"type"`
-	Media string `json:"media"`
+	// Type identifies the poll-option media variant.
+	Type string `json:"type"`
+	// Media is the file_id or URL of the option media for non-link variants.
+	Media string `json:"media,omitempty"`
+	// URL contains the HTTP URL.
+	URL string `json:"url,omitempty"` // Since: Bot API 10.1; for type "link"
 }
 
 // InputPollOption contains information about one answer option in a poll to be sent.
 // Since: Bot API 7.3
 // See https://core.telegram.org/bots/api#inputpolloption
 type InputPollOption struct {
-	Text          string                `json:"text"`
-	TextParseMode ParseMode             `json:"text_parse_mode,omitempty"`
-	TextEntities  []MessageEntity       `json:"text_entities,omitempty"`
-	Media         *InputPollOptionMedia `json:"media,omitempty"` // Since: Bot API 10.0
+	// Text Option text, 1-100 characters
+	Text string `json:"text"`
+	// TextParseMode Optional. Mode for parsing entities in the text. See formatting options for more details.
+	// Currently, only custom emoji entities are allowed.
+	TextParseMode ParseMode `json:"text_parse_mode,omitempty"`
+	// TextEntities Optional. A JSON-serialized list of special entities that appear in the poll option text. It
+	// can be specified instead of text_parse_mode.
+	TextEntities []MessageEntity `json:"text_entities,omitempty"`
+	// Media Optional. Media added to the poll option
+	Media *InputPollOptionMedia `json:"media,omitempty"` // Since: Bot API 10.0
 }
 
 // InputPollMedia describes the media to attach to a poll or its explanation.
 // Since: Bot API 10.0
 // See https://core.telegram.org/bots/api#inputpollmedia
 type InputPollMedia struct {
-	Type  string `json:"type"`
+	// Type identifies the poll-media variant.
+	Type string `json:"type"`
+	// Media is the file_id or URL of the poll media.
 	Media string `json:"media"`
 }
 
 // PollOptionAdded describes a service message about a poll option being added.
 // Since: Bot API 9.6
 type PollOptionAdded struct {
-	PollMessage        *InaccessibleMessage `json:"poll_message,omitempty"`
-	OptionPersistentID string               `json:"option_persistent_id"`
-	OptionText         string               `json:"option_text"`
-	OptionTextEntities []MessageEntity      `json:"option_text_entities,omitempty"`
+	// PollMessage Optional. Message containing the poll to which the option was added, if known. Note that the
+	// Message object in this field will not contain the reply_to_message field even if it itself is a reply.
+	PollMessage *InaccessibleMessage `json:"poll_message,omitempty"`
+	// OptionPersistentID Unique identifier of the added option
+	OptionPersistentID string `json:"option_persistent_id"`
+	// OptionText Option text
+	OptionText string `json:"option_text"`
+	// OptionTextEntities Optional. Special entities that appear in the option_text
+	OptionTextEntities []MessageEntity `json:"option_text_entities,omitempty"`
 }
 
 // PollOptionDeleted describes a service message about a poll option being deleted.
 // Since: Bot API 9.6
 type PollOptionDeleted struct {
-	PollMessage        *InaccessibleMessage `json:"poll_message,omitempty"`
-	OptionPersistentID string               `json:"option_persistent_id"`
-	OptionText         string               `json:"option_text"`
-	OptionTextEntities []MessageEntity      `json:"option_text_entities,omitempty"`
+	// PollMessage Optional. Message containing the poll from which the option was deleted, if known. Note that
+	// the Message object in this field will not contain the reply_to_message field even if it itself is a
+	// reply.
+	PollMessage *InaccessibleMessage `json:"poll_message,omitempty"`
+	// OptionPersistentID Unique identifier of the deleted option
+	OptionPersistentID string `json:"option_persistent_id"`
+	// OptionText Option text
+	OptionText string `json:"option_text"`
+	// OptionTextEntities Optional. Special entities that appear in the option_text
+	OptionTextEntities []MessageEntity `json:"option_text_entities,omitempty"`
 }
 
 // PollType represents the type of a poll.
@@ -219,113 +353,230 @@ const (
 	PollTypeQuiz PollType = "quiz"
 )
 
-// PollAnswer represents an answer of a user in a poll.
+// PollAnswer represents an answer submitted by a poll voter.
+//
+// User and VoterChat remain value fields for v1 compatibility. Their pointer
+// representation is subject to change in v2; use VoterUser and VoterChatInfo
+// when presence matters.
 // Since: Bot API 4.6
 // See https://core.telegram.org/bots/api#pollanswer
 type PollAnswer struct {
-	PollID              string   `json:"poll_id"`
-	VoterChat           Chat     `json:"voter_chat"` // Since: Bot API 6.8
-	User                User     `json:"user"`
-	OptionIDs           []int    `json:"option_ids"`
+	// PollID identifies the poll.
+	PollID string `json:"poll_id"`
+	// VoterChat is the chat that changed the answer, when the voter is anonymous.
+	VoterChat Chat `json:"voter_chat,omitempty"` // Since: Bot API 6.8
+	// User is the user that changed the answer, when the voter is not anonymous.
+	User User `json:"user,omitempty"`
+	// OptionIDs contains the chosen option indices and is empty for a retracted vote.
+	OptionIDs []int `json:"option_ids"`
+	// OptionPersistentIDs contains the persistent identifiers of the chosen options.
 	OptionPersistentIDs []string `json:"option_persistent_ids"` // Since: Bot API 9.6
 }
 
+// VoterUser returns the non-anonymous voter when it is present.
+//
+// Since: Bot API 4.6
+func (a PollAnswer) VoterUser() (*User, bool) {
+	if a.User.ID == 0 {
+		return nil, false
+	}
+	return &a.User, true
+}
+
+// VoterChatInfo returns the anonymous voter chat when it is present.
+//
+// Since: Bot API 6.8
+func (a PollAnswer) VoterChatInfo() (*Chat, bool) {
+	if a.VoterChat.ID == 0 {
+		return nil, false
+	}
+	return &a.VoterChat, true
+}
+
 // Poll contains information about a poll.
 // Since: Bot API 4.2
 // See https://core.telegram.org/bots/api#poll
 type Poll struct {
-	ID               string          `json:"id"`
-	Question         string          `json:"question"`
+	// ID Unique poll identifier
+	ID string `json:"id"`
+	// Question Poll question, 1-300 characters
+	Question string `json:"question"`
+	// QuestionEntities Optional. Special entities that appear in the question. Currently, only custom emoji
+	// entities are allowed in poll questions
 	QuestionEntities []MessageEntity `json:"question_entities"` // Since: Bot API 7.3
-	Options          []PollOption    `json:"options"`
-	TotalVoterCount  int             `json:"total_voter_count"`
-	IsClosed         bool            `json:"is_closed,omitempty"`
-	IsAnonymous      bool            `json:"is_anonymous,omitempty"`
-	Type             PollType        `json:"type"`
+	// Options List of poll options
+	Options []PollOption `json:"options"`
+	// TotalVoterCount Total number of users that voted in the poll
+	TotalVoterCount int `json:"total_voter_count"`
+	// IsClosed True, if the poll is closed
+	IsClosed bool `json:"is_closed,omitempty"`
+	// IsAnonymous True, if the poll is anonymous
+	IsAnonymous bool `json:"is_anonymous,omitempty"`
+	// Type Poll type, currently can be “regular” or “quiz”
+	Type PollType `json:"type"`
 
-	AllowsMultipleAnswers bool            `json:"allows_multiple_answers,omitempty"` // Since: Bot API 4.6
-	AllowsRevoting        bool            `json:"allows_revoting,omitempty"`         // Since: Bot API 9.6
-	MembersOnly           bool            `json:"members_only,omitempty"`            // Since: Bot API 10.0
-	CountryCodes          []string        `json:"country_codes,omitempty"`           // Since: Bot API 10.0
-	CorrectOptionIDs      []int           `json:"correct_option_ids,omitempty"`      // Since: Bot API 9.6
-	Explanation           string          `json:"explanation,omitempty"`             // Since: Bot API 4.8
-	ExplanationEntities   []MessageEntity `json:"explanation_entities,omitempty"`    // Since: Bot API 4.8
-	ExplanationMedia      *PollMedia      `json:"explanation_media,omitempty"`       // Since: Bot API 10.0
-	OpenPeriod            int             `json:"open_period,omitempty"`             // Since: Bot API 4.8
-	CloseDate             int             `json:"close_date,omitempty"`              // Since: Bot API 4.8
-	Description           string          `json:"description,omitempty"`             // Since: Bot API 9.6
-	DescriptionEntities   []MessageEntity `json:"description_entities,omitempty"`    // Since: Bot API 9.6
-	Media                 *PollMedia      `json:"media,omitempty"`                   // Since: Bot API 10.0
+	// AllowsMultipleAnswers True, if the poll allows multiple answers
+	AllowsMultipleAnswers bool `json:"allows_multiple_answers,omitempty"` // Since: Bot API 4.6
+	// AllowsRevoting True, if the poll allows to change the chosen answer options
+	AllowsRevoting bool `json:"allows_revoting,omitempty"` // Since: Bot API 9.6
+	// MembersOnly True if voting is limited to users who have been members of the chat where the poll was
+	// originally sent for more than 24 hours
+	MembersOnly bool `json:"members_only,omitempty"` // Since: Bot API 10.0
+	// CountryCodes Optional. A list of two-letter ISO 3166-1 alpha-2 country codes indicating the countries
+	// from which users can vote in the poll. The country code “FT” is used for users with anonymous
+	// numbers. If omitted, then users from any country can participate in the poll.
+	CountryCodes []string `json:"country_codes,omitempty"` // Since: Bot API 10.0
+	// CorrectOptionIDs Optional. Array of 0-based identifiers of the correct answer options. Available only for
+	// polls in quiz mode which are closed or were sent (not forwarded) by the bot or to the private chat with
+	// the bot.
+	CorrectOptionIDs []int `json:"correct_option_ids,omitempty"` // Since: Bot API 9.6
+	// Explanation Optional. Text that is shown when a user chooses an incorrect answer or taps on the lamp icon
+	// in a quiz-style poll, 0-200 characters
+	Explanation string `json:"explanation,omitempty"` // Since: Bot API 4.8
+	// ExplanationEntities Optional. Special entities like usernames, URLs, bot commands, etc. that appear in
+	// the explanation
+	ExplanationEntities []MessageEntity `json:"explanation_entities,omitempty"` // Since: Bot API 4.8
+	// ExplanationMedia Optional. Media added to the quiz explanation
+	ExplanationMedia *PollMedia `json:"explanation_media,omitempty"` // Since: Bot API 10.0
+	// OpenPeriod Optional. Amount of time in seconds the poll will be active after creation
+	OpenPeriod int `json:"open_period,omitempty"` // Since: Bot API 4.8
+	// CloseDate Optional. Point in time (Unix timestamp) when the poll will be automatically closed
+	CloseDate int `json:"close_date,omitempty"` // Since: Bot API 4.8
+	// Description Optional. Description of the poll; for polls inside the Message object only
+	Description string `json:"description,omitempty"` // Since: Bot API 9.6
+	// DescriptionEntities Optional. Special entities like usernames, URLs, bot commands, etc. that appear in
+	// the description
+	DescriptionEntities []MessageEntity `json:"description_entities,omitempty"` // Since: Bot API 9.6
+	// Media Optional. Media added to the poll description; for polls inside the Message object only
+	Media *PollMedia `json:"media,omitempty"` // Since: Bot API 10.0
+}
+
+// Link represents an HTTP link.
+// Since: Bot API 10.1
+// See https://core.telegram.org/bots/api#link
+type Link struct {
+	// URL contains the HTTP URL.
+	URL string `json:"url"`
 }
 
 // PollMedia represents media attached to a poll.
 // Since: Bot API 10.0
 type PollMedia struct {
-	Animation *Animation  `json:"animation,omitempty"`
-	Audio     *Audio      `json:"audio,omitempty"`
-	Document  *Document   `json:"document,omitempty"`
-	LivePhoto *LivePhoto  `json:"live_photo,omitempty"`
-	Location  *Location   `json:"location,omitempty"`
-	Photo     []PhotoSize `json:"photo,omitempty"`
-	Sticker   *Sticker    `json:"sticker,omitempty"`
-	Venue     *Venue      `json:"venue,omitempty"`
-	Video     *Video      `json:"video,omitempty"`
+	// Animation Optional. Media is an animation, information about the animation
+	Animation *Animation `json:"animation,omitempty"`
+	// Audio Optional. Media is an audio file, information about the file; currently, can't be received in a
+	// poll option
+	Audio *Audio `json:"audio,omitempty"`
+	// Document Optional. Media is a general file, information about the file; currently, can't be received in a
+	// poll option
+	Document *Document `json:"document,omitempty"`
+	// Link contains link media attached to the poll.
+	Link *Link `json:"link,omitempty"` // Since: Bot API 10.1
+	// LivePhoto Optional. Media is a live photo, information about the live photo
+	LivePhoto *LivePhoto `json:"live_photo,omitempty"`
+	// Location Optional. Media is a shared location, information about the location
+	Location *Location `json:"location,omitempty"`
+	// Photo Optional. Media is a photo, available sizes of the photo
+	Photo []PhotoSize `json:"photo,omitempty"`
+	// Sticker Optional. Media is a sticker, information about the sticker; currently, for poll options only
+	Sticker *Sticker `json:"sticker,omitempty"`
+	// Venue Optional. Media is a venue, information about the venue
+	Venue *Venue `json:"venue,omitempty"`
+	// Video Optional. Media is a video, information about the video
+	Video *Video `json:"video,omitempty"`
 }
 
 // ChecklistTask represents a single task in a checklist.
 // Since: Bot API 9.1
 type ChecklistTask struct {
-	ID              int             `json:"id"`
-	Text            string          `json:"text"`
-	TextEntities    []MessageEntity `json:"text_entities,omitempty"`
-	CompletedByUser *User           `json:"completed_by_user,omitempty"`
-	CompletedByChat *Chat           `json:"completed_by_chat,omitempty"`
-	CompletionDate  int             `json:"completion_date,omitempty"`
+	// ID Unique identifier of the task
+	ID int `json:"id"`
+	// Text Text of the task
+	Text string `json:"text"`
+	// TextEntities Optional. Special entities that appear in the task text
+	TextEntities []MessageEntity `json:"text_entities,omitempty"`
+	// CompletedByUser Optional. User that completed the task; omitted if the task wasn't completed by a user
+	CompletedByUser *User `json:"completed_by_user,omitempty"`
+	// CompletedByChat Optional. Chat that completed the task; omitted if the task wasn't completed by a chat
+	CompletedByChat *Chat `json:"completed_by_chat,omitempty"`
+	// CompletionDate Optional. Point in time (Unix timestamp) when the task was completed; 0 if the task wasn't
+	// completed
+	CompletionDate int `json:"completion_date,omitempty"`
 }
 
 // Checklist represents a checklist.
 // Since: Bot API 9.1
 type Checklist struct {
-	Title                    string          `json:"title"`
-	TitleEntities            []MessageEntity `json:"title_entities,omitempty"`
-	Tasks                    []ChecklistTask `json:"tasks"`
-	OthersCanAddTasks        bool            `json:"others_can_add_tasks,omitempty"`
-	OthersCanMarkTasksAsDone bool            `json:"others_can_mark_tasks_as_done,omitempty"`
+	// Title Title of the checklist
+	Title string `json:"title"`
+	// TitleEntities Optional. Special entities that appear in the checklist title
+	TitleEntities []MessageEntity `json:"title_entities,omitempty"`
+	// Tasks List of tasks in the checklist
+	Tasks []ChecklistTask `json:"tasks"`
+	// OthersCanAddTasks Optional. True, if users other than the creator of the list can add tasks to the list
+	OthersCanAddTasks bool `json:"others_can_add_tasks,omitempty"`
+	// OthersCanMarkTasksAsDone Optional. True, if users other than the creator of the list can mark tasks as
+	// done or not done
+	OthersCanMarkTasksAsDone bool `json:"others_can_mark_tasks_as_done,omitempty"`
 }
 
 // InputChecklistTask describes a task in a checklist.
 // Since: Bot API 9.1
 type InputChecklistTask struct {
-	ID           int             `json:"id"`
-	Text         string          `json:"text"`
-	ParseMode    ParseMode       `json:"parse_mode,omitempty"`
+	// ID Unique identifier of the task; must be positive and unique among all task identifiers currently
+	// present in the checklist
+	ID int `json:"id"`
+	// Text Text of the task; 1-100 characters after entities parsing
+	Text string `json:"text"`
+	// ParseMode Optional. Mode for parsing entities in the text. See formatting options for more details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// TextEntities Optional. List of special entities that appear in the text, which can be specified instead
+	// of parse_mode. Currently, only bold, italic, underline, strikethrough, spoiler, custom_emoji, and
+	// date_time entities are allowed.
 	TextEntities []MessageEntity `json:"text_entities,omitempty"`
 }
 
 // InputChecklist represents a checklist to be sent.
 // Since: Bot API 9.1
 type InputChecklist struct {
-	Title                   string               `json:"title"`
-	ParseMode               ParseMode            `json:"parse_mode,omitempty"`
-	TitleEntities           []MessageEntity      `json:"title_entities,omitempty"`
-	Tasks                   []InputChecklistTask `json:"tasks"`
-	OtherCanAddTasks        bool                 `json:"other_can_add_tasks,omitempty"`
-	OtherCanMarkTasksAsDone bool                 `json:"other_can_mark_tasks_as_done,omitempty"`
+	// Title Title of the checklist; 1-255 characters after entities parsing
+	Title string `json:"title"`
+	// ParseMode Optional. Mode for parsing entities in the title. See formatting options for more details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// TitleEntities Optional. List of special entities that appear in the title, which can be specified instead
+	// of parse_mode. Currently, only bold, italic, underline, strikethrough, spoiler, custom_emoji, and
+	// date_time entities are allowed.
+	TitleEntities []MessageEntity `json:"title_entities,omitempty"`
+	// Tasks List of 1-30 tasks in the checklist
+	Tasks []InputChecklistTask `json:"tasks"`
+	// OtherCanAddTasks Optional. Pass True if other users can add tasks to the checklist
+	// Subject to change in v2: the Go field name may be corrected to OthersCanAddTasks.
+	OtherCanAddTasks bool `json:"others_can_add_tasks,omitempty"`
+	// OtherCanMarkTasksAsDone Optional. Pass True if other users can mark tasks as done or not done in the
+	// checklist
+	// Subject to change in v2: the Go field name may be corrected to OthersCanMarkTasksAsDone.
+	OtherCanMarkTasksAsDone bool `json:"others_can_mark_tasks_as_done,omitempty"`
 }
 
 // ChecklistTaskDone describes a service message about checklist tasks being marked as done.
 // Since: Bot API 9.1
 type ChecklistTaskDone struct {
-	ChecklistMessage       *Message `json:"checklist_message,omitempty"`
-	MarkedAsDoneTaskIDs    []int    `json:"marked_as_done_task_ids,omitempty"`
-	MarkedAsNotDoneTaskIDs []int    `json:"marked_as_not_done_task_ids,omitempty"`
+	// ChecklistMessage is the checklist message when it is available.
+	ChecklistMessage *Message `json:"checklist_message,omitempty"`
+	// MarkedAsDoneTaskIDs Optional. Identifiers of the tasks that were marked as done
+	MarkedAsDoneTaskIDs []int `json:"marked_as_done_task_ids,omitempty"`
+	// MarkedAsNotDoneTaskIDs Optional. Identifiers of the tasks that were marked as not done
+	MarkedAsNotDoneTaskIDs []int `json:"marked_as_not_done_task_ids,omitempty"`
 }
 
 // ChecklistTasksAdded describes a service message about new checklist tasks being added.
 // Since: Bot API 9.1
 type ChecklistTasksAdded struct {
-	ChecklistMessage *Message        `json:"checklist_message,omitempty"`
-	Tasks            []ChecklistTask `json:"tasks"`
+	// ChecklistMessage Optional. Message containing the checklist to which the tasks were added. Note that the
+	// Message object in this field will not contain the reply_to_message field even if it itself is a reply.
+	ChecklistMessage *Message `json:"checklist_message,omitempty"`
+	// Tasks List of tasks added to the checklist
+	Tasks []ChecklistTask `json:"tasks"`
 }
 
 // InputMediaType represents the type of input media.
@@ -342,10 +593,18 @@ const (
 	InputMediaTypeVideo InputMediaType = "video"
 	// InputMediaTypeAudio is an audio file.
 	InputMediaTypeAudio InputMediaType = "audio"
+	// InputMediaTypeVoiceNote is a voice message.
+	//
+	// Since: Bot API 10.2
+	InputMediaTypeVoiceNote InputMediaType = "voice_note"
 
-	InputMediaTypeSticker   InputMediaType = "sticker"
-	InputMediaTypeLocation  InputMediaType = "location"
-	InputMediaTypeVenue     InputMediaType = "venue"
+	// InputMediaTypeSticker is a sticker.
+	InputMediaTypeSticker InputMediaType = "sticker"
+	// InputMediaTypeLocation is a location.
+	InputMediaTypeLocation InputMediaType = "location"
+	// InputMediaTypeVenue is a venue.
+	InputMediaTypeVenue InputMediaType = "venue"
+	// InputMediaTypeLivePhoto is a live photo.
 	InputMediaTypeLivePhoto InputMediaType = "live_photo" // Since: Bot API 10.0
 )
 
@@ -353,35 +612,64 @@ const (
 // Since: Bot API 4.0
 // See https://core.telegram.org/bots/api#inputmedia
 type InputMedia struct {
-	Type  InputMediaType `json:"type"`
-	Media string         `json:"media"`
+	// Type identifies the concrete input-media variant.
+	Type InputMediaType `json:"type"`
+	// Media is a file_id, HTTP URL, or attach:// reference for the media.
+	Media string `json:"media"`
 
-	Caption               *string         `json:"caption,omitempty"`
-	ParseMode             *ParseMode      `json:"parse_mode,omitempty"`
-	CaptionEntities       []MessageEntity `json:"caption_entities,omitempty"`
-	ShowCaptionAboveMedia *bool           `json:"show_caption_above_media,omitempty"` // Since: Bot API 7.4
-	HasSpoiler            *bool           `json:"has_spoiler,omitempty"`              // Since: Bot API 6.4
+	// Caption is the optional media caption.
+	Caption *string `json:"caption,omitempty"`
+	// ParseMode selects how entities in Caption are parsed.
+	ParseMode *ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. List of special entities that appear in the caption, which can be specified
+	// instead of parse_mode
+	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
+	// ShowCaptionAboveMedia Optional. Pass True if the caption must be shown above the message media
+	ShowCaptionAboveMedia *bool `json:"show_caption_above_media,omitempty"` // Since: Bot API 7.4
+	// HasSpoiler requests that supported media be covered by a spoiler animation.
+	HasSpoiler *bool `json:"has_spoiler,omitempty"` // Since: Bot API 6.4
 
-	Cover             *string `json:"cover"`           // Since: Bot API 8.3
-	StartTimestamp    *int    `json:"start_timestamp"` // Since: Bot API 8.3
-	Width             *int    `json:"width,omitempty"`
-	Height            *int    `json:"height,omitempty"`
-	Duration          *int    `json:"duration,omitempty"`
-	SupportsStreaming *bool   `json:"supports_streaming,omitempty"`
+	// Cover Optional. Cover for the video in the message. Pass a file_id to send a file that exists on the
+	// Telegram servers (recommended), pass an HTTP URL for Telegram to get a file from the Internet, or pass
+	// “attach://<file_attach_name>” to upload a new one using multipart/form-data under <file_attach_name>
+	// name. More information on Sending Files »
+	Cover *string `json:"cover"` // Since: Bot API 8.3
+	// StartTimestamp Optional. Start timestamp for the video in the message
+	StartTimestamp *int `json:"start_timestamp"` // Since: Bot API 8.3
+	// Width is the optional media width in pixels.
+	Width *int `json:"width,omitempty"`
+	// Height is the optional media height in pixels.
+	Height *int `json:"height,omitempty"`
+	// Duration is the optional duration of the media in seconds.
+	Duration *int `json:"duration,omitempty"`
+	// SupportsStreaming Optional. Pass True if the uploaded video is suitable for streaming
+	SupportsStreaming *bool `json:"supports_streaming,omitempty"`
 
+	// Performer Optional. Performer of the audio
 	Performer *string `json:"performer,omitempty"`
-	Title     *string `json:"title,omitempty"`
+	// Title is the optional title of audio or venue media.
+	Title *string `json:"title,omitempty"`
 
+	// Emoji Optional. Emoji associated with the sticker; only for just uploaded stickers
 	Emoji *string `json:"emoji,omitempty"`
 
-	Latitude        *float64 `json:"latitude,omitempty"`
-	Longitude       *float64 `json:"longitude,omitempty"`
-	Address         *string  `json:"address,omitempty"`
-	FoursquareID    *string  `json:"foursquare_id,omitempty"`
-	FoursquareType  *string  `json:"foursquare_type,omitempty"`
-	GooglePlaceID   *string  `json:"google_place_id,omitempty"`
-	GooglePlaceType *string  `json:"google_place_type,omitempty"`
+	// Latitude Latitude of the location
+	Latitude *float64 `json:"latitude,omitempty"`
+	// Longitude Longitude of the location
+	Longitude *float64 `json:"longitude,omitempty"`
+	// Address Address of the venue
+	Address *string `json:"address,omitempty"`
+	// FoursquareID Optional. Foursquare identifier of the venue
+	FoursquareID *string `json:"foursquare_id,omitempty"`
+	// FoursquareType Optional. Foursquare type of the venue, if known. (For example,
+	// “arts_entertainment/default”, “arts_entertainment/aquarium” or “food/icecream”.)
+	FoursquareType *string `json:"foursquare_type,omitempty"`
+	// GooglePlaceID Optional. Google Places identifier of the venue
+	GooglePlaceID *string `json:"google_place_id,omitempty"`
+	// GooglePlaceType Optional. Google Places type of the venue. (See supported types.)
+	GooglePlaceType *string `json:"google_place_type,omitempty"`
 
+	// HorizontalAccuracy Optional. The radius of uncertainty for the location, measured in meters; 0-1500
 	HorizontalAccuracy *float64 `json:"horizontal_accuracy,omitempty"`
 }
 
@@ -401,37 +689,65 @@ const (
 // Since: Bot API 7.6
 // See https://core.telegram.org/bots/api#inputpaidmedia
 type InputPaidMedia struct {
-	Type  InputPaidMediaType `json:"type"`
-	Media string             `json:"media"`
+	// Type identifies the concrete paid-media variant.
+	Type InputPaidMediaType `json:"type"`
+	// Media is a file_id, HTTP URL, or attach:// reference for the paid media.
+	Media string `json:"media"`
 
-	Cover             *string `json:"cover,omitempty"`           // Since: Bot API 8.3
-	StartTimestamp    *int64  `json:"start_timestamp,omitempty"` // Since: Bot API 8.3
-	Width             *int    `json:"width,omitempty"`
-	Height            *int    `json:"height,omitempty"`
-	Duration          *int    `json:"duration,omitempty"`
-	SupportsStreaming *bool   `json:"supports_streaming,omitempty"`
+	// Cover Optional. Cover for the video in the message. Pass a file_id to send a file that exists on the
+	// Telegram servers (recommended), pass an HTTP URL for Telegram to get a file from the Internet, or pass
+	// “attach://<file_attach_name>” to upload a new one using multipart/form-data under <file_attach_name>
+	// name. More information on Sending Files »
+	Cover *string `json:"cover,omitempty"` // Since: Bot API 8.3
+	// StartTimestamp Optional. Start timestamp for the video in the message
+	StartTimestamp *int64 `json:"start_timestamp,omitempty"` // Since: Bot API 8.3
+	// Width Optional. Video width
+	Width *int `json:"width,omitempty"`
+	// Height Optional. Video height
+	Height *int `json:"height,omitempty"`
+	// Duration Optional. Video duration in seconds
+	Duration *int `json:"duration,omitempty"`
+	// SupportsStreaming Optional. Pass True if the uploaded video is suitable for streaming
+	SupportsStreaming *bool `json:"supports_streaming,omitempty"`
 }
 
 // PhotoSize represents one size of a photo or a file/sticker thumbnail.
 // Since: Bot API 1.0
 // See https://core.telegram.org/bots/api#photosize
 type PhotoSize struct {
-	FileID       string `json:"file_id"`
+	// FileID Identifier for this file, which can be used to download or reuse the file
+	FileID string `json:"file_id"`
+	// FileUniqueID Unique identifier for this file, which is supposed to be the same over time and for
+	// different bots. Can't be used to download or reuse the file.
 	FileUniqueID string `json:"file_unique_id"`
-	Width        int    `json:"width"`
-	Height       int    `json:"height"`
-	FileSize     int64  `json:"file_size,omitempty"`
+	// Width Photo width
+	Width int `json:"width"`
+	// Height Photo height
+	Height int `json:"height"`
+	// FileSize Optional. File size in bytes
+	FileSize int64 `json:"file_size,omitempty"`
 }
 
 // LivePhoto represents a live photo (a photo with a short video attached).
 // Since: Bot API 10.0
 type LivePhoto struct {
-	Photo        []PhotoSize `json:"photo,omitempty"`
-	FileID       string      `json:"file_id"`
-	FileUniqueID string      `json:"file_unique_id"`
-	Width        int         `json:"width"`
-	Height       int         `json:"height"`
-	Duration     int         `json:"duration"`
-	MIMEType     string      `json:"mime_type,omitempty"`
-	FileSize     int64       `json:"file_size,omitempty"`
+	// Photo Optional. Available sizes of the corresponding static photo
+	Photo []PhotoSize `json:"photo,omitempty"`
+	// FileID Identifier for the video file which can be used to download or reuse the file
+	FileID string `json:"file_id"`
+	// FileUniqueID Unique identifier for the video file which is supposed to be the same over time and for
+	// different bots. Can't be used to download or reuse the file.
+	FileUniqueID string `json:"file_unique_id"`
+	// Width Video width as defined by the sender
+	Width int `json:"width"`
+	// Height Video height as defined by the sender
+	Height int `json:"height"`
+	// Duration Duration of the video in seconds as defined by the sender
+	Duration int `json:"duration"`
+	// MIMEType Optional. MIME type of the file as defined by the sender
+	MIMEType string `json:"mime_type,omitempty"`
+	// FileSize Optional. File size in bytes. It can be bigger than 2^31 and some programming languages may have
+	// difficulty/silent defects in interpreting it. But it has at most 52 significant bits, so a signed 64-bit
+	// integer or double-precision float type are safe for storing this value.
+	FileSize int64 `json:"file_size,omitempty"`
 }

tgapi/attachments_types_test.go

@@ -0,0 +1,20 @@
+package tgapi
+
+import "testing"
+
+func TestPollAnswerVoterHelpers(t *testing.T) {
+	userAnswer := PollAnswer{User: User{ID: 42}}
+	user, ok := userAnswer.VoterUser()
+	if !ok || user.ID != 42 {
+		t.Fatalf("unexpected voter user: %#v, %v", user, ok)
+	}
+	if chat, ok := userAnswer.VoterChatInfo(); ok || chat != nil {
+		t.Fatalf("unexpected voter chat: %#v, %v", chat, ok)
+	}
+
+	chatAnswer := PollAnswer{VoterChat: Chat{ID: -100}}
+	chat, ok := chatAnswer.VoterChatInfo()
+	if !ok || chat.ID != -100 {
+		t.Fatalf("unexpected voter chat: %#v, %v", chat, ok)
+	}
+}

tgapi/bot_methods.go

@@ -6,9 +6,15 @@ import "context"
 // Since: Bot API 4.7
 // See https://core.telegram.org/bots/api#setmycommands
 type SetMyCommands struct {
-	Commands []BotCommand     `json:"commands"`
-	Scope    *BotCommandScope `json:"scope,omitempty"`
-	Language string           `json:"language_code,omitempty"`
+	// Commands Required. A JSON-serialized list of bot commands to be set as the list of the bot's commands. At
+	// most 100 commands can be specified.
+	Commands []BotCommand `json:"commands"`
+	// Scope Optional. A JSON-serialized object, describing scope of users for which the commands are relevant.
+	// Defaults to BotCommandScopeDefault.
+	Scope *BotCommandScope `json:"scope,omitempty"`
+	// Language Optional. A two-letter ISO 639-1 language code. If empty, commands will be applied to all users
+	// from the given scope, for whose language there are no dedicated commands.
+	Language string `json:"language_code,omitempty"`
 }
 
 // SetMyCommands changes the list of the bot's commands.
@@ -33,8 +39,12 @@ func (api *API) SetMyCommandsWithContext(ctx context.Context, params SetMyComman
 // Since: Bot API 5.3
 // See https://core.telegram.org/bots/api#deletemycommands
 type DeleteMyCommands struct {
-	Scope    *BotCommandScope `json:"scope,omitempty"`
-	Language string           `json:"language_code,omitempty"`
+	// Scope Optional. A JSON-serialized object, describing scope of users for which the commands are relevant.
+	// Defaults to BotCommandScopeDefault.
+	Scope *BotCommandScope `json:"scope,omitempty"`
+	// Language Optional. A two-letter ISO 639-1 language code. If empty, commands will be applied to all users
+	// from the given scope, for whose language there are no dedicated commands.
+	Language string `json:"language_code,omitempty"`
 }
 
 // DeleteMyCommands deletes the list of the bot's commands for the given scope and user language.
@@ -59,8 +69,10 @@ func (api *API) DeleteMyCommandsWithContext(ctx context.Context, params DeleteMy
 // Since: Bot API 4.7
 // See https://core.telegram.org/bots/api#getmycommands
 type GetMyCommands struct {
-	Scope    *BotCommandScope `json:"scope,omitempty"`
-	Language string           `json:"language_code,omitempty"`
+	// Scope Optional. A JSON-serialized object, describing scope of users. Defaults to BotCommandScopeDefault.
+	Scope *BotCommandScope `json:"scope,omitempty"`
+	// Language Optional. A two-letter ISO 639-1 language code or an empty string
+	Language string `json:"language_code,omitempty"`
 }
 
 // GetMyCommands returns the current list of the bot's commands for the given scope and user language.
@@ -84,7 +96,11 @@ func (api *API) GetMyCommandsWithContext(ctx context.Context, params GetMyComman
 // Since: Bot API 6.7
 // See https://core.telegram.org/bots/api#setmyname
 type SetMyName struct {
-	Name     string `json:"name"`
+	// Name Optional. New bot name; 0-64 characters. Pass an empty string to remove the dedicated name for the
+	// given language.
+	Name string `json:"name"`
+	// Language Optional. A two-letter ISO 639-1 language code. If empty, the name will be shown to all users
+	// for whose language there is no dedicated name.
 	Language string `json:"language_code,omitempty"`
 }
 
@@ -110,6 +126,7 @@ func (api *API) SetMyNameWithContext(ctx context.Context, params SetMyName) (boo
 // Since: Bot API 6.7
 // See https://core.telegram.org/bots/api#getmyname
 type GetMyName struct {
+	// Language Optional. A two-letter ISO 639-1 language code or an empty string
 	Language string `json:"language_code,omitempty"`
 }
 
@@ -134,8 +151,12 @@ func (api *API) GetMyNameWithContext(ctx context.Context, params GetMyName) (Bot
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#setmydescription
 type SetMyDescription struct {
+	// Description Optional. New bot description; 0-512 characters. Pass an empty string to remove the dedicated
+	// description for the given language.
 	Description string `json:"description"`
-	Language    string `json:"language_code,omitempty"`
+	// Language Optional. A two-letter ISO 639-1 language code. If empty, the description will be applied to all
+	// users for whose language there is no dedicated description.
+	Language string `json:"language_code,omitempty"`
 }
 
 // SetMyDescription changes the bot's description.
@@ -160,6 +181,7 @@ func (api *API) SetMyDescriptionWithContext(ctx context.Context, params SetMyDes
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#getmydescription
 type GetMyDescription struct {
+	// Language Optional. A two-letter ISO 639-1 language code or an empty string
 	Language string `json:"language_code,omitempty"`
 }
 
@@ -184,8 +206,12 @@ func (api *API) GetMyDescriptionWithContext(ctx context.Context, params GetMyDes
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#setmyshortdescription
 type SetMyShortDescription struct {
+	// ShortDescription Optional. New short description for the bot; 0-120 characters. Pass an empty string to
+	// remove the dedicated short description for the given language.
 	ShortDescription string `json:"short_description,omitempty"`
-	Language         string `json:"language_code,omitempty"`
+	// Language Optional. A two-letter ISO 639-1 language code. If empty, the short description will be applied
+	// to all users for whose language there is no dedicated short description.
+	Language string `json:"language_code,omitempty"`
 }
 
 // SetMyShortDescription changes the bot's short description.
@@ -210,6 +236,7 @@ func (api *API) SetMyShortDescriptionWithContext(ctx context.Context, params Set
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#getmyshortdescription
 type GetMyShortDescription struct {
+	// Language Optional. A two-letter ISO 639-1 language code or an empty string
 	Language string `json:"language_code,omitempty"`
 }
 
@@ -234,6 +261,7 @@ func (api *API) GetMyShortDescriptionWithContext(ctx context.Context, params Get
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#setmyprofilephoto
 type SetMyProfilePhoto struct {
+	// Photo Required. The new profile photo to set
 	Photo InputProfilePhoto `json:"photo"`
 }
 
@@ -277,7 +305,11 @@ func (api *API) RemoveMyProfilePhotoWithContext(ctx context.Context) (bool, erro
 // Since: Bot API 6.0
 // See https://core.telegram.org/bots/api#setchatmenubutton
 type SetChatMenuButton struct {
-	ChatID     int64       `json:"chat_id,omitempty"`
+	// ChatID Optional. Unique identifier for the target private chat. If not specified, the bot's default menu
+	// button will be changed.
+	ChatID int64 `json:"chat_id,omitempty"`
+	// MenuButton Optional. A JSON-serialized object for the bot's new menu button. Defaults to
+	// MenuButtonDefault.
 	MenuButton *MenuButton `json:"menu_button,omitempty"`
 }
 
@@ -303,6 +335,8 @@ func (api *API) SetChatMenuButtonWithContext(ctx context.Context, params SetChat
 // Since: Bot API 6.0
 // See https://core.telegram.org/bots/api#getchatmenubutton
 type GetChatMenuButton struct {
+	// ChatID Optional. Unique identifier for the target private chat. If not specified, the bot's default menu
+	// button will be returned.
 	ChatID int64 `json:"chat_id,omitempty"`
 }
 
@@ -327,8 +361,12 @@ func (api *API) GetChatMenuButtonWithContext(ctx context.Context, params GetChat
 // Since: Bot API 6.0
 // See https://core.telegram.org/bots/api#setmydefaultadministratorrights
 type SetMyDefaultAdministratorRights struct {
-	Rights      *ChatAdministratorRights `json:"rights"`
-	ForChannels bool                     `json:"for_channels"`
+	// Rights Optional. A JSON-serialized object describing new default administrator rights. If not specified,
+	// the default administrator rights will be cleared.
+	Rights *ChatAdministratorRights `json:"rights"`
+	// ForChannels Optional. Pass True to change the default administrator rights of the bot in channels.
+	// Otherwise, the default administrator rights of the bot for groups and supergroups will be changed.
+	ForChannels bool `json:"for_channels"`
 }
 
 // SetMyDefaultAdministratorRights changes the default administrator rights for the bot.
@@ -353,6 +391,8 @@ func (api *API) SetMyDefaultAdministratorRightsWithContext(ctx context.Context,
 // Since: Bot API 6.0
 // See https://core.telegram.org/bots/api#getmydefaultadministratorrights
 type GetMyDefaultAdministratorRights struct {
+	// ForChannels Optional. Pass True to get default administrator rights of the bot in channels. Otherwise,
+	// default administrator rights of the bot for groups and supergroups will be returned.
 	ForChannels bool `json:"for_channels"`
 }
 
@@ -394,13 +434,27 @@ func (api *API) GetAvailableGiftsWithContext(ctx context.Context) (Gifts, error)
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#sendgift
 type SendGift struct {
-	UserID        int64           `json:"user_id,omitempty"`
-	ChatID        int64           `json:"chat_id,omitempty"`
-	GiftID        string          `json:"gift_id"`
-	PayForUpgrade bool            `json:"pay_for_upgrade"`
-	Text          string          `json:"text"`
-	TextParseMode ParseMode       `json:"text_parse_mode,omitempty"`
-	TextEntities  []MessageEntity `json:"text_entities,omitempty"`
+	// UserID Optional. Required if chat_id is not specified. Unique identifier of the target user who will
+	// receive the gift.
+	UserID int64 `json:"user_id,omitempty"`
+	// ChatID Optional. Required if user_id is not specified. Unique identifier for the chat or username of the
+	// channel (in the format @username) that will receive the gift.
+	ChatID int64 `json:"chat_id,omitempty"`
+	// GiftID Required. Identifier of the gift; limited gifts can't be sent to channel chats
+	GiftID string `json:"gift_id"`
+	// PayForUpgrade Optional. Pass True to pay for the gift upgrade from the bot's balance, thereby making the
+	// upgrade free for the receiver
+	PayForUpgrade bool `json:"pay_for_upgrade"`
+	// Text Optional. Text that will be shown along with the gift; 0-128 characters
+	Text string `json:"text"`
+	// TextParseMode Optional. Mode for parsing entities in the text. See formatting options for more details.
+	// Entities other than “bold”, “italic”, “underline”, “strikethrough”, “spoiler”,
+	// “custom_emoji”, and “date_time” are ignored.
+	TextParseMode ParseMode `json:"text_parse_mode,omitempty"`
+	// TextEntities Optional. A JSON-serialized list of special entities that appear in the gift text. It can be
+	// specified instead of text_parse_mode. Entities other than “bold”, “italic”, “underline”,
+	// “strikethrough”, “spoiler”, “custom_emoji”, and “date_time” are ignored.
+	TextEntities []MessageEntity `json:"text_entities,omitempty"`
 }
 
 // SendGift sends a gift to the given user or chat.
@@ -425,12 +479,25 @@ func (api *API) SendGiftWithContext(ctx context.Context, params SendGift) (bool,
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#giftpremiumsubscription
 type GiftPremiumSubscription struct {
-	UserID        int64           `json:"user_id"`
-	MonthCount    int             `json:"month_count"`
-	StarCount     int             `json:"star_count"`
-	Text          string          `json:"text,omitempty"`
-	TextParseMode ParseMode       `json:"text_parse_mode,omitempty"`
-	TextEntities  []MessageEntity `json:"text_entities,omitempty"`
+	// UserID Required. Unique identifier of the target user who will receive a Telegram Premium subscription
+	UserID int64 `json:"user_id"`
+	// MonthCount Required. Number of months the Telegram Premium subscription will be active for the user; must
+	// be one of 3, 6, or 12
+	MonthCount int `json:"month_count"`
+	// StarCount Required. Number of Telegram Stars to pay for the Telegram Premium subscription; must be 1000
+	// for 3 months, 1500 for 6 months, and 2500 for 12 months
+	StarCount int `json:"star_count"`
+	// Text Optional. Text that will be shown along with the service message about the subscription; 0-128
+	// characters
+	Text string `json:"text,omitempty"`
+	// TextParseMode Optional. Mode for parsing entities in the text. See formatting options for more details.
+	// Entities other than “bold”, “italic”, “underline”, “strikethrough”, “spoiler”,
+	// “custom_emoji”, and “date_time” are ignored.
+	TextParseMode ParseMode `json:"text_parse_mode,omitempty"`
+	// TextEntities Optional. A JSON-serialized list of special entities that appear in the gift text. It can be
+	// specified instead of text_parse_mode. Entities other than “bold”, “italic”, “underline”,
+	// “strikethrough”, “spoiler”, “custom_emoji”, and “date_time” are ignored.
+	TextEntities []MessageEntity `json:"text_entities,omitempty"`
 }
 
 // GiftPremiumSubscription gifts a Telegram Premium subscription to the user.
@@ -455,6 +522,7 @@ func (api *API) GiftPremiumSubscriptionWithContext(ctx context.Context, params G
 // Since: Bot API 10.0
 // See https://core.telegram.org/bots/api#getmanagedbotaccesssettings
 type GetManagedBotAccessSettings struct {
+	// BotUserID identifies the managed bot.
 	BotUserID int64 `json:"bot_user_id"`
 }
 
@@ -479,7 +547,9 @@ func (api *API) GetManagedBotAccessSettingsWithContext(ctx context.Context, para
 // Since: Bot API 10.0
 // See https://core.telegram.org/bots/api#setmanagedbotaccesssettings
 type SetManagedBotAccessSettings struct {
-	BotUserID      int64             `json:"bot_user_id"`
+	// BotUserID identifies the managed bot.
+	BotUserID int64 `json:"bot_user_id"`
+	// AccessSettings contains the access settings to apply to the managed bot.
 	AccessSettings BotAccessSettings `json:"access_settings"`
 }
 

tgapi/bot_types.go

@@ -4,8 +4,13 @@ package tgapi
 // Since: Bot API 4.7
 // See https://core.telegram.org/bots/api#botcommand
 type BotCommand struct {
-	Command     string `json:"command"`
+	// Command Text of the command; 1-32 characters. Can contain only lowercase English letters, digits and
+	// underscores.
+	Command string `json:"command"`
+	// Description Description of the command; 1-256 characters
 	Description string `json:"description"`
+	// IsEphemeral marks the command as visible only in ephemeral command contexts.
+	IsEphemeral bool `json:"is_ephemeral,omitempty"` // Since: Bot API 10.2
 }
 
 // BotCommandScopeType indicates the type of a command scope.
@@ -32,26 +37,33 @@ const (
 // Since: Bot API 5.3
 // See https://core.telegram.org/bots/api#botcommandscope
 type BotCommandScope struct {
-	Type   BotCommandScopeType `json:"type"`
-	ChatID *int64              `json:"chat_id,omitempty"`
-	UserID *int64              `json:"user_id,omitempty"`
+	// Type identifies the concrete command-scope variant.
+	Type BotCommandScopeType `json:"type"`
+	// ChatID Unique identifier for the target chat or username of the target supergroup in the format
+	// @username. Channel direct messages chats and channel chats aren't supported.
+	ChatID *int64 `json:"chat_id,omitempty"`
+	// UserID Unique identifier of the target user
+	UserID *int64 `json:"user_id,omitempty"`
 }
 
 // BotName represents the bot's name.
 // Since: Bot API 6.7
 type BotName struct {
+	// Name The bot's name
 	Name string `json:"name"`
 }
 
 // BotDescription represents the bot's description.
 // Since: Bot API 6.6
 type BotDescription struct {
+	// Description The bot's description
 	Description string `json:"description"`
 }
 
 // BotShortDescription represents the bot's short description.
 // Since: Bot API 6.6
 type BotShortDescription struct {
+	// ShortDescription The bot's short description
 	ShortDescription string `json:"short_description"`
 }
 
@@ -69,13 +81,22 @@ const (
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#inputprofilephoto
 type InputProfilePhoto struct {
+	// Type identifies the static-photo or animated-photo variant.
 	Type InputProfilePhotoType `json:"type"`
 
+	// Photo The static profile photo. Profile photos can't be reused and can only be uploaded as a new file, so
+	// you can pass “attach://<file_attach_name>” if the photo was uploaded using multipart/form-data under
+	// <file_attach_name>. More information on Sending Files »
 	// Static fields (for static photos)
 	Photo *string `json:"photo,omitempty"`
 
+	// Animation The animated profile photo. Profile photos can't be reused and can only be uploaded as a new
+	// file, so you can pass “attach://<file_attach_name>” if the photo was uploaded using
+	// multipart/form-data under <file_attach_name>. More information on Sending Files »
 	// Animated fields (for animated profile videos)
-	Animation          *string  `json:"animation,omitempty"`
+	Animation *string `json:"animation,omitempty"`
+	// MainFrameTimestamp Optional. Timestamp in seconds of the frame that will be used as the static profile
+	// photo. Defaults to 0.0.
 	MainFrameTimestamp *float64 `json:"main_frame_timestamp,omitempty"`
 }
 
@@ -95,10 +116,16 @@ const (
 // Since: Bot API 6.0
 // See https://core.telegram.org/bots/api#menubutton
 type MenuButton struct {
+	// Type identifies the commands, web_app, or default menu-button variant.
 	Type MenuButtonType `json:"type"`
 
+	// Text Text on the button
 	// WebApp fields (for web_app button)
-	Text   *string     `json:"text"`
+	Text *string `json:"text"`
+	// WebApp Description of the Web App that will be launched when the user presses the button. The Web App
+	// will be able to send an arbitrary message on behalf of the user using the method answerWebAppQuery.
+	// Alternatively, a t.me link to a Web App of the bot can be specified in the object instead of the Web
+	// App's URL, in which case the Web App will be opened as if the user pressed the link.
 	WebApp *WebAppInfo `json:"web_app"`
 }
 
@@ -106,5 +133,6 @@ type MenuButton struct {
 // Since: Bot API 10.0
 // See https://core.telegram.org/bots/api#botaccesssettings
 type BotAccessSettings struct {
+	// AllowAllPrivateChats reports whether the managed bot may access all private chats of its owner.
 	AllowAllPrivateChats bool `json:"allow_all_private_chats"`
 }

tgapi/business_methods.go

@@ -6,7 +6,10 @@ import "context"
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#verifyuser
 type VerifyUser struct {
-	UserID            int64  `json:"user_id"`
+	// UserID Required. Unique identifier of the target user
+	UserID int64 `json:"user_id"`
+	// CustomDescription Optional. Custom description for the verification; 0-70 characters. Must be empty if
+	// the organization isn't allowed to provide a custom verification description.
 	CustomDescription string `json:"custom_description,omitempty"`
 }
 
@@ -32,7 +35,11 @@ func (api *API) VerifyUserWithContext(ctx context.Context, params VerifyUser) (b
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#verifychat
 type VerifyChat struct {
-	ChatID            int64  `json:"chat_id"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username. Channel direct messages chats can't be verified.
+	ChatID int64 `json:"chat_id"`
+	// CustomDescription Optional. Custom description for the verification; 0-70 characters. Must be empty if
+	// the organization isn't allowed to provide a custom verification description.
 	CustomDescription string `json:"custom_description,omitempty"`
 }
 
@@ -58,6 +65,7 @@ func (api *API) VerifyChatWithContext(ctx context.Context, params VerifyChat) (b
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#removeuserverification
 type RemoveUserVerification struct {
+	// UserID Required. Unique identifier of the target user
 	UserID int64 `json:"user_id"`
 }
 
@@ -83,6 +91,8 @@ func (api *API) RemoveUserVerificationWithContext(ctx context.Context, params Re
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#removechatverification
 type RemoveChatVerification struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target bot or channel in the
+	// format @username
 	ChatID int64 `json:"chat_id"`
 }
 
@@ -108,9 +118,14 @@ func (api *API) RemoveChatVerificationWithContext(ctx context.Context, params Re
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#readbusinessmessage
 type ReadBusinessMessage struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection on behalf of which to read
+	// the message
 	BusinessConnectionID string `json:"business_connection_id"`
-	ChatID               int64  `json:"chat_id"`
-	MessageID            int    `json:"message_id"`
+	// ChatID Required. Unique identifier of the chat in which the message was received. The chat must have been
+	// active in the last 24 hours.
+	ChatID int64 `json:"chat_id"`
+	// MessageID Required. Unique identifier of the message to mark as read
+	MessageID int `json:"message_id"`
 }
 
 // ReadBusinessMessage marks a business message as read.
@@ -135,6 +150,7 @@ func (api *API) ReadBusinessMessageWithContext(ctx context.Context, params ReadB
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#getbusinessconnection
 type GetBusinessConnection struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
 }
 
@@ -159,8 +175,12 @@ func (api *API) GetBusinessConnectionWithContext(ctx context.Context, params Get
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#deletebusinessmessages
 type DeleteBusinessMessages struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection on behalf of which to delete
+	// the messages
 	BusinessConnectionID string `json:"business_connection_id"`
-	MessageIDs           []int  `json:"message_ids"`
+	// MessageIDs Required. A JSON-serialized list of 1-100 identifiers of messages to delete. All messages must
+	// be from the same chat. See deleteMessage for limitations on which messages can be deleted.
+	MessageIDs []int `json:"message_ids"`
 }
 
 // DeleteBusinessMessages deletes business messages.
@@ -185,9 +205,12 @@ func (api *API) DeleteBusinessMessagesWithContext(ctx context.Context, params De
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#setbusinessaccountname
 type SetBusinessAccountName struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
-	FirstName            string `json:"first_name"`
-	LastName             string `json:"last_name,omitempty"`
+	// FirstName Required. The new value of the first name for the business account; 1-64 characters
+	FirstName string `json:"first_name"`
+	// LastName Optional. The new value of the last name for the business account; 0-64 characters
+	LastName string `json:"last_name,omitempty"`
 }
 
 // SetBusinessAccountName sets the first and last name of a business account.
@@ -212,8 +235,10 @@ func (api *API) SetBusinessAccountNameWithContext(ctx context.Context, params Se
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#setbusinessaccountusername
 type SetBusinessAccountUsername struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
-	Username             string `json:"username,omitempty"`
+	// Username Optional. The new value of the username for the business account; 0-32 characters
+	Username string `json:"username,omitempty"`
 }
 
 // SetBusinessAccountUsername sets the username of a business account.
@@ -238,8 +263,10 @@ func (api *API) SetBusinessAccountUsernameWithContext(ctx context.Context, param
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#setbusinessaccountbio
 type SetBusinessAccountBio struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
-	Bio                  string `json:"bio,omitempty"`
+	// Bio Optional. The new value of the bio for the business account; 0-140 characters
+	Bio string `json:"bio,omitempty"`
 }
 
 // SetBusinessAccountBio sets the bio of a business account.
@@ -264,9 +291,13 @@ func (api *API) SetBusinessAccountBioWithContext(ctx context.Context, params Set
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#setbusinessaccountprofilephoto
 type SetBusinessAccountProfilePhoto struct {
-	BusinessConnectionID string            `json:"business_connection_id"`
-	Photo                InputProfilePhoto `json:"photo,omitempty"`
-	IsPublic             bool              `json:"is_public,omitempty"`
+	// BusinessConnectionID Required. Unique identifier of the business connection
+	BusinessConnectionID string `json:"business_connection_id"`
+	// Photo Required. The new profile photo to set
+	Photo InputProfilePhoto `json:"photo,omitempty"`
+	// IsPublic Optional. Pass True to set the public photo, which will be visible even if the main photo is
+	// hidden by the business account's privacy settings. An account can have only one public photo.
+	IsPublic bool `json:"is_public,omitempty"`
 }
 
 // SetBusinessAccountProfilePhoto sets the profile photo of a business account.
@@ -291,8 +322,12 @@ func (api *API) SetBusinessAccountProfilePhotoWithContext(ctx context.Context, p
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#removebusinessaccountprofilephoto
 type RemoveBusinessAccountProfilePhoto struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
-	IsPublic             bool   `json:"is_public,omitempty"`
+	// IsPublic Optional. Pass True to remove the public photo, which is visible even if the main photo is
+	// hidden by the business account's privacy settings. After the main photo is removed, the previous profile
+	// photo (if present) becomes the main photo.
+	IsPublic bool `json:"is_public,omitempty"`
 }
 
 // RemoveBusinessAccountProfilePhoto removes the profile photo of a business account.
@@ -317,9 +352,13 @@ func (api *API) RemoveBusinessAccountProfilePhotoWithContext(ctx context.Context
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#setbusinessaccountgiftsettings
 type SetBusinessAccountGiftSettings struct {
-	BusinessConnectionID string            `json:"business_connection_id"`
-	ShowGiftButton       bool              `json:"show_gift_button"`
-	AcceptedGiftTypes    AcceptedGiftTypes `json:"accepted_gift_types"`
+	// BusinessConnectionID Required. Unique identifier of the business connection
+	BusinessConnectionID string `json:"business_connection_id"`
+	// ShowGiftButton Required. Pass True if a button for sending a gift to the user or by the business account
+	// must always be shown in the input field
+	ShowGiftButton bool `json:"show_gift_button"`
+	// AcceptedGiftTypes Required. Types of gifts accepted by the business account
+	AcceptedGiftTypes AcceptedGiftTypes `json:"accepted_gift_types"`
 }
 
 // SetBusinessAccountGiftSettings sets gift settings for a business account.
@@ -344,6 +383,7 @@ func (api *API) SetBusinessAccountGiftSettingsWithContext(ctx context.Context, p
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#getbusinessaccountstarbalance
 type GetBusinessAccountStarBalance struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
 }
 
@@ -368,8 +408,10 @@ func (api *API) GetBusinessAccountStarBalanceWithContext(ctx context.Context, pa
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#transferbusinessaccountstars
 type TransferBusinessAccountStars struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
-	StarCount            int    `json:"star_count"`
+	// StarCount Required. Number of Telegram Stars to transfer; 1-10000
+	StarCount int `json:"star_count"`
 }
 
 // TransferBusinessAccountStars transfers stars from a business account.
@@ -394,17 +436,33 @@ func (api *API) TransferBusinessAccountStarsWithContext(ctx context.Context, par
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#getbusinessaccountgifts
 type GetBusinessAccountGifts struct {
-	BusinessConnectionID        string `json:"business_connection_id"`
-	ExcludeUnsaved              bool   `json:"exclude_unsaved,omitempty"`
-	ExcludeSaved                bool   `json:"exclude_saved,omitempty"`
-	ExcludeUnlimited            bool   `json:"exclude_unlimited,omitempty"`
-	ExcludeLimitedUpgradable    bool   `json:"exclude_limited_upgradable,omitempty"`
-	ExcludeLimitedNonUpgradable bool   `json:"exclude_limited_non_upgradable,omitempty"`
-	ExcludeUnique               bool   `json:"exclude_unique,omitempty"`
-	ExcludeFromBlockchain       bool   `json:"exclude_from_blockchain,omitempty"`
-	SortByPrice                 bool   `json:"sort_by_price,omitempty"`
-	Offset                      string `json:"offset,omitempty"`
-	Limit                       int    `json:"limit,omitempty"`
+	// BusinessConnectionID Required. Unique identifier of the business connection
+	BusinessConnectionID string `json:"business_connection_id"`
+	// ExcludeUnsaved Optional. Pass True to exclude gifts that aren't saved to the account's profile page
+	ExcludeUnsaved bool `json:"exclude_unsaved,omitempty"`
+	// ExcludeSaved Optional. Pass True to exclude gifts that are saved to the account's profile page
+	ExcludeSaved bool `json:"exclude_saved,omitempty"`
+	// ExcludeUnlimited Optional. Pass True to exclude gifts that can be purchased an unlimited number of times
+	ExcludeUnlimited bool `json:"exclude_unlimited,omitempty"`
+	// ExcludeLimitedUpgradable Optional. Pass True to exclude gifts that can be purchased a limited number of
+	// times and can be upgraded to unique
+	ExcludeLimitedUpgradable bool `json:"exclude_limited_upgradable,omitempty"`
+	// ExcludeLimitedNonUpgradable Optional. Pass True to exclude gifts that can be purchased a limited number
+	// of times and can't be upgraded to unique
+	ExcludeLimitedNonUpgradable bool `json:"exclude_limited_non_upgradable,omitempty"`
+	// ExcludeUnique Optional. Pass True to exclude unique gifts
+	ExcludeUnique bool `json:"exclude_unique,omitempty"`
+	// ExcludeFromBlockchain Optional. Pass True to exclude gifts that were assigned from the TON blockchain and
+	// can't be resold or transferred in Telegram
+	ExcludeFromBlockchain bool `json:"exclude_from_blockchain,omitempty"`
+	// SortByPrice Optional. Pass True to sort results by gift price instead of send date. Sorting is applied
+	// before pagination.
+	SortByPrice bool `json:"sort_by_price,omitempty"`
+	// Offset Optional. Offset of the first entry to return as received from the previous request; use empty
+	// string to get the first chunk of results
+	Offset string `json:"offset,omitempty"`
+	// Limit Optional. The maximum number of gifts to be returned; 1-100. Defaults to 100.
+	Limit int `json:"limit,omitempty"`
 }
 
 // GetBusinessAccountGifts returns gifts owned by a business account.
@@ -428,8 +486,10 @@ func (api *API) GetBusinessAccountGiftsWithContext(ctx context.Context, params G
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#convertgifttostars
 type ConvertGiftToStars struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
-	OwnedGiftID          string `json:"owned_gift_id"`
+	// OwnedGiftID Required. Unique identifier of the regular gift that should be converted to Telegram Stars
+	OwnedGiftID string `json:"owned_gift_id"`
 }
 
 // ConvertGiftToStars converts a gift to Telegram Stars.
@@ -454,10 +514,17 @@ func (api *API) ConvertGiftToStarsWithContext(ctx context.Context, params Conver
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#upgradegift
 type UpgradeGift struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
-	OwnedGiftID          string `json:"owned_gift_id"`
-	KeepOriginalDetails  bool   `json:"keep_original_details,omitempty"`
-	StarCount            int    `json:"star_count,omitempty"`
+	// OwnedGiftID Required. Unique identifier of the regular gift that should be upgraded to a unique one
+	OwnedGiftID string `json:"owned_gift_id"`
+	// KeepOriginalDetails Optional. Pass True to keep the original gift text, sender and receiver in the
+	// upgraded gift
+	KeepOriginalDetails bool `json:"keep_original_details,omitempty"`
+	// StarCount Optional. The amount of Telegram Stars that will be paid for the upgrade from the business
+	// account balance. If gift.prepaid_upgrade_star_count > 0, then pass 0, otherwise, the can_transfer_stars
+	// business bot right is required and gift.upgrade_star_count must be passed.
+	StarCount int `json:"star_count,omitempty"`
 }
 
 // UpgradeGift upgrades a gift.
@@ -482,10 +549,16 @@ func (api *API) UpgradeGiftWithContext(ctx context.Context, params UpgradeGift)
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#transfergift
 type TransferGift struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
-	OwnedGiftID          string `json:"owned_gift_id"`
-	NewOwnerChatID       int64  `json:"new_owner_chat_id"`
-	StarCount            int    `json:"star_count,omitempty"`
+	// OwnedGiftID Required. Unique identifier of the regular gift that should be transferred
+	OwnedGiftID string `json:"owned_gift_id"`
+	// NewOwnerChatID Required. Unique identifier of the chat which will own the gift. The chat must be active
+	// in the last 24 hours.
+	NewOwnerChatID int64 `json:"new_owner_chat_id"`
+	// StarCount Optional. The amount of Telegram Stars that will be paid for the transfer from the business
+	// account balance. If positive, then the can_transfer_stars business bot right is required.
+	StarCount int `json:"star_count,omitempty"`
 }
 
 // TransferGift transfers a gift to another chat.
@@ -510,16 +583,29 @@ func (api *API) TransferGiftWithContext(ctx context.Context, params TransferGift
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#poststory
 type PostStory struct {
-	BusinessConnectionID string            `json:"business_connection_id"`
-	Content              InputStoryContent `json:"content"`
-	ActivePeriod         int               `json:"active_period"`
+	// BusinessConnectionID Required. Unique identifier of the business connection
+	BusinessConnectionID string `json:"business_connection_id"`
+	// Content Required. Content of the story
+	Content InputStoryContent `json:"content"`
+	// ActivePeriod Required. Period after which the story is moved to the archive, in seconds; must be one of 6
+	// * 3600, 12 * 3600, 86400, or 2 * 86400
+	ActivePeriod int `json:"active_period"`
 
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// Caption Optional. Caption of the story, 0-2048 characters after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the story caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
-	Areas           []StoryArea     `json:"areas"`
+	// Areas Optional. A JSON-serialized list of clickable areas to be shown on the story
+	Areas []StoryArea `json:"areas"`
 
+	// PostToChatPage Optional. Pass True to keep the story accessible after it expires
 	PostToChatPage bool `json:"post_to_chat_page,omitempty"`
+	// ProtectContent Optional. Pass True if the content of the story must be protected from forwarding and
+	// screenshotting
 	ProtectContent bool `json:"protect_content,omitempty"`
 }
 
@@ -544,12 +630,20 @@ func (api *API) PostStoryWithContext(ctx context.Context, params PostStory) (Sto
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#repoststory
 type RepostStory struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
-	FromChatID           int64  `json:"from_chat_id"`
-	FromStoryID          int    `json:"from_story_id"`
-	ActivePeriod         int    `json:"active_period"`
-	PostToChatPage       bool   `json:"post_to_chat_page,omitempty"`
-	ProtectContent       bool   `json:"protect_content,omitempty"`
+	// FromChatID Required. Unique identifier of the chat which posted the story that should be reposted
+	FromChatID int64 `json:"from_chat_id"`
+	// FromStoryID Required. Unique identifier of the story that should be reposted
+	FromStoryID int `json:"from_story_id"`
+	// ActivePeriod Required. Period after which the story is moved to the archive, in seconds; must be one of 6
+	// * 3600, 12 * 3600, 86400, or 2 * 86400
+	ActivePeriod int `json:"active_period"`
+	// PostToChatPage Optional. Pass True to keep the story accessible after it expires
+	PostToChatPage bool `json:"post_to_chat_page,omitempty"`
+	// ProtectContent Optional. Pass True if the content of the story must be protected from forwarding and
+	// screenshotting
+	ProtectContent bool `json:"protect_content,omitempty"`
 }
 
 // RepostStory reposts a story from another chat.
@@ -574,14 +668,23 @@ func (api *API) RepostStoryWithContext(ctx context.Context, params RepostStory)
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#editstory
 type EditStory struct {
-	BusinessConnectionID string            `json:"business_connection_id"`
-	StoryID              int               `json:"story_id"`
-	Content              InputStoryContent `json:"content"`
+	// BusinessConnectionID Required. Unique identifier of the business connection
+	BusinessConnectionID string `json:"business_connection_id"`
+	// StoryID Required. Unique identifier of the story to edit
+	StoryID int `json:"story_id"`
+	// Content Required. Content of the story
+	Content InputStoryContent `json:"content"`
 
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// Caption Optional. Caption of the story, 0-2048 characters after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the story caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
-	Areas           []StoryArea     `json:"areas,omitempty"`
+	// Areas Optional. A JSON-serialized list of clickable areas to be shown on the story
+	Areas []StoryArea `json:"areas,omitempty"`
 }
 
 // EditStory edits an existing story.
@@ -606,8 +709,10 @@ func (api *API) EditStoryWithContext(ctx context.Context, params EditStory) (Sto
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#deletestory
 type DeleteStory struct {
+	// BusinessConnectionID Required. Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
-	StoryID              int    `json:"story_id"`
+	// StoryID Required. Unique identifier of the story to delete
+	StoryID int `json:"story_id"`
 }
 
 // DeleteStory deletes a story.

tgapi/business_types.go

@@ -4,8 +4,11 @@ package tgapi
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#businessintro
 type BusinessIntro struct {
-	Title   string   `json:"title,omitempty"`
-	Message string   `json:"message,omitempty"`
+	// Title Optional. Title text of the business intro
+	Title string `json:"title,omitempty"`
+	// Message Optional. Message text of the business intro
+	Message string `json:"message,omitempty"`
+	// Sticker Optional. Sticker of the business intro
 	Sticker *Sticker `json:"sticker,omitempty"`
 }
 
@@ -13,7 +16,9 @@ type BusinessIntro struct {
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#businesslocation
 type BusinessLocation struct {
-	Address  string    `json:"address"`
+	// Address Address of the business
+	Address string `json:"address"`
+	// Location Optional. Location of the business
 	Location *Location `json:"location,omitempty"`
 }
 
@@ -21,7 +26,11 @@ type BusinessLocation struct {
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#businessopeninghoursinterval
 type BusinessOpeningHoursInterval struct {
+	// OpeningMinute The minute's sequence number in a week, starting on Monday, marking the start of the time
+	// interval during which the business is open; 0 - 7 * 24 * 60
 	OpeningMinute int `json:"opening_minute"`
+	// ClosingMinute The minute's sequence number in a week, starting on Monday, marking the end of the time
+	// interval during which the business is open; 0 - 8 * 24 * 60
 	ClosingMinute int `json:"closing_minute"`
 }
 
@@ -29,7 +38,9 @@ type BusinessOpeningHoursInterval struct {
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#businessopeninghours
 type BusinessOpeningHours struct {
-	TimeZoneName string                         `json:"time_zone_name"`
+	// TimeZoneName Unique name of the time zone for which the opening hours are defined
+	TimeZoneName string `json:"time_zone_name"`
+	// OpeningHours List of time intervals describing business opening hours
 	OpeningHours []BusinessOpeningHoursInterval `json:"opening_hours"`
 }
 
@@ -38,41 +49,75 @@ type BusinessOpeningHours struct {
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#businessbotrights
 type BusinessBotRights struct {
-	CanReply                   *bool `json:"can_reply,omitempty"`
-	CanReadMessages            *bool `json:"can_read_messages,omitempty"`
-	CanDeleteSentMessages      *bool `json:"can_delete_sent_messages,omitempty"`
-	CanDeleteAllMessages       *bool `json:"can_delete_all_messages,omitempty"`
-	CanEditName                *bool `json:"can_edit_name,omitempty"`
-	CanEditBio                 *bool `json:"can_edit_bio,omitempty"`
-	CanEditProfilePhoto        *bool `json:"can_edit_profile_photo,omitempty"`
-	CanEditUsername            *bool `json:"can_edit_username,omitempty"`
-	CanChangeGiftSettings      *bool `json:"can_change_gift_settings,omitempty"`
-	CanViewGiftsAndStars       *bool `json:"can_view_gifts_and_stars,omitempty"`
-	CanConvertGiftsToStars     *bool `json:"can_convert_gifts_to_stars,omitempty"`
+	// CanReply Optional. True, if the bot can send and edit messages in the private chats that had incoming
+	// messages in the last 24 hours
+	CanReply *bool `json:"can_reply,omitempty"`
+	// CanReadMessages Optional. True, if the bot can mark incoming private messages as read
+	CanReadMessages *bool `json:"can_read_messages,omitempty"`
+	// CanDeleteSentMessages Optional. True, if the bot can delete messages sent by the bot
+	CanDeleteSentMessages *bool `json:"can_delete_sent_messages,omitempty"`
+	// CanDeleteAllMessages Optional. True, if the bot can delete all private messages in managed chats
+	CanDeleteAllMessages *bool `json:"can_delete_all_messages,omitempty"`
+	// CanEditName Optional. True, if the bot can edit the first and last name of the business account
+	CanEditName *bool `json:"can_edit_name,omitempty"`
+	// CanEditBio Optional. True, if the bot can edit the bio of the business account
+	CanEditBio *bool `json:"can_edit_bio,omitempty"`
+	// CanEditProfilePhoto Optional. True, if the bot can edit the profile photo of the business account
+	CanEditProfilePhoto *bool `json:"can_edit_profile_photo,omitempty"`
+	// CanEditUsername Optional. True, if the bot can edit the username of the business account
+	CanEditUsername *bool `json:"can_edit_username,omitempty"`
+	// CanChangeGiftSettings Optional. True, if the bot can change the privacy settings pertaining to gifts for
+	// the business account
+	CanChangeGiftSettings *bool `json:"can_change_gift_settings,omitempty"`
+	// CanViewGiftsAndStars Optional. True, if the bot can view gifts and the amount of Telegram Stars owned by
+	// the business account
+	CanViewGiftsAndStars *bool `json:"can_view_gifts_and_stars,omitempty"`
+	// CanConvertGiftsToStars Optional. True, if the bot can convert regular gifts owned by the business account
+	// to Telegram Stars
+	CanConvertGiftsToStars *bool `json:"can_convert_gifts_to_stars,omitempty"`
+	// CanTransferAndUpgradeGifts Optional. True, if the bot can transfer and upgrade gifts owned by the
+	// business account
 	CanTransferAndUpgradeGifts *bool `json:"can_transfer_and_upgrade_gifts,omitempty"`
-	CanTransferStars           *bool `json:"can_transfer_stars,omitempty"`
-	CanManageStories           *bool `json:"can_manage_stories,omitempty"`
+	// CanTransferStars Optional. True, if the bot can transfer Telegram Stars received by the business account
+	// to its own account, or use them to upgrade and transfer gifts
+	CanTransferStars *bool `json:"can_transfer_stars,omitempty"`
+	// CanManageStories Optional. True, if the bot can post, edit and delete stories on behalf of the business
+	// account
+	CanManageStories *bool `json:"can_manage_stories,omitempty"`
 }
 
 // BusinessConnection contains information about a business connection.
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#businessconnection
 type BusinessConnection struct {
-	ID         string             `json:"id"`
-	User       User               `json:"user"`
-	UserChatID int64              `json:"user_chat_id"`
-	Date       int                `json:"date"`
-	Rights     *BusinessBotRights `json:"rights,omitempty"`
-	IsEnabled  bool               `json:"is_enabled"`
+	// ID Unique identifier of the business connection
+	ID string `json:"id"`
+	// User Business account user that created the business connection
+	User User `json:"user"`
+	// UserChatID Identifier of a private chat with the user who created the business connection. This number
+	// may have more than 32 significant bits and some programming languages may have difficulty/silent defects
+	// in interpreting it. But it has at most 52 significant bits, so a 64-bit integer or double-precision float
+	// type are safe for storing this identifier.
+	UserChatID int64 `json:"user_chat_id"`
+	// Date Date the connection was established in Unix time
+	Date int `json:"date"`
+	// Rights Optional. Rights of the business bot
+	Rights *BusinessBotRights `json:"rights,omitempty"`
+	// IsEnabled True, if the connection is active
+	IsEnabled bool `json:"is_enabled"`
 }
 
 // BusinessMessagesDeleted is received when messages are deleted from a connected business account.
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#businessmessagesdeleted
 type BusinessMessagesDeleted struct {
+	// BusinessConnectionID Unique identifier of the business connection
 	BusinessConnectionID string `json:"business_connection_id"`
-	Chat                 Chat   `json:"chat"`
-	MessageIDs           []int  `json:"message_ids"`
+	// Chat Information about a chat in the business account. The bot may not have access to the chat or the
+	// corresponding user.
+	Chat Chat `json:"chat"`
+	// MessageIDs The list of identifiers of deleted messages in the chat of the business account
+	MessageIDs []int `json:"message_ids"`
 }
 
 // InputStoryContentType indicates the type of input story content.
@@ -89,27 +134,38 @@ const (
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#inputstorycontent
 type InputStoryContent struct {
+	// Type identifies the photo or video story-content variant.
 	Type InputStoryContentType `json:"type"`
 
 	// Photo fields
 	Photo *string `json:"photo,omitempty"`
 
 	// Video fields
-	Video               *string  `json:"video,omitempty"`
-	Duration            *float64 `json:"duration,omitempty"`
+	Video *string `json:"video,omitempty"`
+	// Duration Optional. Precise duration of the video in seconds; 0-60
+	Duration *float64 `json:"duration,omitempty"`
+	// CoverFrameTimestamp Optional. Timestamp in seconds of the frame that will be used as the static cover for
+	// the story. Defaults to 0.0.
 	CoverFrameTimestamp *float64 `json:"cover_frame_timestamp,omitempty"`
-	IsAnimation         *bool    `json:"is_animation,omitempty"`
+	// IsAnimation Optional. Pass True if the video has no sound
+	IsAnimation *bool `json:"is_animation,omitempty"`
 }
 
 // StoryAreaPosition describes the position of a clickable area on a story.
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#storyareaposition
 type StoryAreaPosition struct {
-	XPercentage            float64 `json:"x_percentage"`
-	YPercentage            float64 `json:"y_percentage"`
-	WidthPercentage        float64 `json:"width_percentage"`
-	HeightPercentage       float64 `json:"height_percentage"`
-	RotationAngle          float64 `json:"rotation_angle"`
+	// XPercentage The abscissa of the area's center, as a percentage of the media width
+	XPercentage float64 `json:"x_percentage"`
+	// YPercentage The ordinate of the area's center, as a percentage of the media height
+	YPercentage float64 `json:"y_percentage"`
+	// WidthPercentage The width of the area's rectangle, as a percentage of the media width
+	WidthPercentage float64 `json:"width_percentage"`
+	// HeightPercentage The height of the area's rectangle, as a percentage of the media height
+	HeightPercentage float64 `json:"height_percentage"`
+	// RotationAngle The clockwise rotation angle of the rectangle, in degrees; 0-360
+	RotationAngle float64 `json:"rotation_angle"`
+	// CornerRadiusPercentage The radius of the rectangle corner rounding, as a percentage of the media width
 	CornerRadiusPercentage float64 `json:"corner_radius_percentage"`
 }
 
@@ -133,26 +189,38 @@ const (
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#storyareatype
 type StoryAreaType struct {
+	// Type identifies the concrete story-area variant.
 	Type StoryAreaTypeType `json:"type"`
 
+	// Latitude Location latitude in degrees
 	// Location
-	Latitude  *float64         `json:"latitude,omitempty"`
-	Longitude *float64         `json:"longitude,omitempty"`
-	Address   *LocationAddress `json:"address,omitempty"`
+	Latitude *float64 `json:"latitude,omitempty"`
+	// Longitude Location longitude in degrees
+	Longitude *float64 `json:"longitude,omitempty"`
+	// Address Optional. Address of the location
+	Address *LocationAddress `json:"address,omitempty"`
 
+	// ReactionType Type of the reaction
 	// Suggested reaction
 	ReactionType *ReactionType `json:"reaction_type,omitempty"`
-	IsDark       *bool         `json:"is_dark,omitempty"`
-	IsFlipped    *bool         `json:"is_flipped,omitempty"`
+	// IsDark Optional. Pass True if the reaction area has a dark background
+	IsDark *bool `json:"is_dark,omitempty"`
+	// IsFlipped Optional. Pass True if reaction area corner is flipped
+	IsFlipped *bool `json:"is_flipped,omitempty"`
 
+	// URL HTTP or tg:// URL to be opened when the area is clicked
 	// Link
 	URL *string `json:"url,omitempty"`
 
+	// Temperature Temperature, in degree Celsius
 	// Weather
-	Temperature     *float64 `json:"temperature,omitempty"`
-	Emoji           *string  `json:"emoji,omitempty"`
-	BackgroundColor *int     `json:"background_color,omitempty"`
+	Temperature *float64 `json:"temperature,omitempty"`
+	// Emoji Emoji representing the weather
+	Emoji *string `json:"emoji,omitempty"`
+	// BackgroundColor A color of the area background in the ARGB format
+	BackgroundColor *int `json:"background_color,omitempty"`
 
+	// Name Unique name of the gift
 	// Unique gift
 	Name *string `json:"name,omitempty"`
 }
@@ -161,6 +229,8 @@ type StoryAreaType struct {
 // Since: Bot API 9.0
 // See https://core.telegram.org/bots/api#storyarea
 type StoryArea struct {
+	// Position Position of the area
 	Position StoryAreaPosition `json:"position"`
-	Type     StoryAreaType     `json:"type"`
+	// Type Type of the area
+	Type StoryAreaType `json:"type"`
 }

tgapi/chat_methods.go

@@ -6,10 +6,19 @@ import "context"
 // Since: Bot API 5.3
 // See https://core.telegram.org/bots/api#banchatmember
 type BanChatMember struct {
-	ChatID         int64 `json:"chat_id"`
-	UserID         int64 `json:"user_id"`
-	UntilDate      int   `json:"until_date,omitempty"`
-	RevokeMessages bool  `json:"revoke_messages,omitempty"`
+	// ChatID Required. Unique identifier for the target group or username of the target supergroup or channel
+	// in the format @username
+	ChatID int64 `json:"chat_id"`
+	// UserID Required. Unique identifier of the target user
+	UserID int64 `json:"user_id"`
+	// UntilDate Optional. Date when the user will be unbanned; Unix time. If user is banned for more than 366
+	// days or less than 30 seconds from the current time they are considered to be banned forever. Applied for
+	// supergroups and channels only.
+	UntilDate int `json:"until_date,omitempty"`
+	// RevokeMessages Optional. Pass True to delete all messages from the chat for the user that is being
+	// removed. If False, the user will be able to see messages in the group that were sent before the user was
+	// removed. Always True for supergroups and channels.
+	RevokeMessages bool `json:"revoke_messages,omitempty"`
 }
 
 // BanChatMember bans a user in a chat.
@@ -34,9 +43,13 @@ func (api *API) BanChatMemberWithContext(ctx context.Context, params BanChatMemb
 // Since: Bot API 2.0
 // See https://core.telegram.org/bots/api#unbanchatmember
 type UnbanChatMember struct {
-	ChatID       int64 `json:"chat_id"`
-	UserID       int64 `json:"user_id"`
-	OnlyIfBanned bool  `json:"only_if_banned"`
+	// ChatID Required. Unique identifier for the target group or username of the target supergroup or channel
+	// in the format @username
+	ChatID int64 `json:"chat_id"`
+	// UserID Required. Unique identifier of the target user
+	UserID int64 `json:"user_id"`
+	// OnlyIfBanned Optional. Do nothing if the user is not banned
+	OnlyIfBanned bool `json:"only_if_banned"`
 }
 
 // UnbanChatMember unbans a previously banned user in a chat.
@@ -61,11 +74,23 @@ func (api *API) UnbanChatMemberWithContext(ctx context.Context, params UnbanChat
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#restrictchatmember
 type RestrictChatMember struct {
-	ChatID                        int64           `json:"chat_id"`
-	UserID                        int64           `json:"user_id"`
-	Permissions                   ChatPermissions `json:"permissions"`
-	UseIndependentChatPermissions bool            `json:"use_independent_chat_permissions,omitempty"`
-	UntilDate                     int             `json:"until_date,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// UserID Required. Unique identifier of the target user
+	UserID int64 `json:"user_id"`
+	// Permissions Required. A JSON-serialized object for new user permissions
+	Permissions ChatPermissions `json:"permissions"`
+	// UseIndependentChatPermissions Optional. Pass True if chat permissions are set independently. Otherwise,
+	// the can_send_other_messages and can_add_web_page_previews permissions will imply the can_send_messages,
+	// can_send_audios, can_send_documents, can_send_photos, can_send_videos, can_send_video_notes, and
+	// can_send_voice_notes permissions; the can_send_polls permission will imply the can_send_messages
+	// permission.
+	UseIndependentChatPermissions bool `json:"use_independent_chat_permissions,omitempty"`
+	// UntilDate Optional. Date when restrictions will be lifted for the user; Unix time. If user is restricted
+	// for more than 366 days or less than 30 seconds from the current time, they are considered to be
+	// restricted forever.
+	UntilDate int `json:"until_date,omitempty"`
 }
 
 // RestrictChatMember restricts a user in a chat.
@@ -90,26 +115,58 @@ func (api *API) RestrictChatMemberWithContext(ctx context.Context, params Restri
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#promotechatmember
 type PromoteChatMember struct {
-	ChatID      int64 `json:"chat_id"`
-	UserID      int64 `json:"user_id"`
-	IsAnonymous bool  `json:"is_anonymous,omitempty"` // Since: Bot API 5.1
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// UserID Required. Unique identifier of the target user
+	UserID int64 `json:"user_id"`
+	// IsAnonymous Optional. Pass True if the administrator's presence in the chat is hidden
+	IsAnonymous bool `json:"is_anonymous,omitempty"` // Since: Bot API 5.1
 
-	CanManageChat           bool `json:"can_manage_chat,omitempty"` // Since: Bot API 5.3
-	CanDeleteMessages       bool `json:"can_delete_messages,omitempty"`
-	CanManageVideoChats     bool `json:"can_manage_video_chats,omitempty"` // Since: Bot API 6.0
-	CanRestrictMembers      bool `json:"can_restrict_members,omitempty"`
-	CanPromoteMembers       bool `json:"can_promote_members,omitempty"`
-	CanChangeInfo           bool `json:"can_change_info,omitempty"`
-	CanInviteUsers          bool `json:"can_invite_users,omitempty"`
-	CanPostStories          bool `json:"can_post_stories,omitempty"`   // Since: Bot API 6.9
-	CanEditStories          bool `json:"can_edit_stories,omitempty"`   // Since: Bot API 6.9
-	CanDeleteStories        bool `json:"can_delete_stories,omitempty"` // Since: Bot API 6.9
-	CanPostMessages         bool `json:"can_post_messages,omitempty"`
-	CanEditMessages         bool `json:"can_edit_messages,omitempty"`
-	CanPinMessages          bool `json:"can_pin_messages,omitempty"`
-	CanManageTopics         bool `json:"can_manage_topics,omitempty"`          // Since: Bot API 6.3
+	// CanManageChat Optional. Pass True if the administrator can access the chat event log, get boost list, see
+	// hidden supergroup and channel members, report spam messages, ignore slow mode, and send messages to the
+	// chat without paying Telegram Stars. Implied by any other administrator privilege.
+	CanManageChat bool `json:"can_manage_chat,omitempty"` // Since: Bot API 5.3
+	// CanDeleteMessages Optional. Pass True if the administrator can delete messages of other users
+	CanDeleteMessages bool `json:"can_delete_messages,omitempty"`
+	// CanManageVideoChats Optional. Pass True if the administrator can manage video chats
+	CanManageVideoChats bool `json:"can_manage_video_chats,omitempty"` // Since: Bot API 6.0
+	// CanRestrictMembers Optional. Pass True if the administrator can restrict, ban or unban chat members, or
+	// access supergroup statistics. For backward compatibility, defaults to True for promotions of channel
+	// administrators.
+	CanRestrictMembers bool `json:"can_restrict_members,omitempty"`
+	// CanPromoteMembers Optional. Pass True if the administrator can add new administrators with a subset of
+	// their own privileges or demote administrators that they have promoted, directly or indirectly (promoted
+	// by administrators that were appointed by him)
+	CanPromoteMembers bool `json:"can_promote_members,omitempty"`
+	// CanChangeInfo Optional. Pass True if the administrator can change chat title, photo and other settings
+	CanChangeInfo bool `json:"can_change_info,omitempty"`
+	// CanInviteUsers Optional. Pass True if the administrator can invite new users to the chat
+	CanInviteUsers bool `json:"can_invite_users,omitempty"`
+	// CanPostStories Optional. Pass True if the administrator can post stories to the chat
+	CanPostStories bool `json:"can_post_stories,omitempty"` // Since: Bot API 6.9
+	// CanEditStories Optional. Pass True if the administrator can edit stories posted by other users, post
+	// stories to the chat page, pin chat stories, and access the chat's story archive
+	CanEditStories bool `json:"can_edit_stories,omitempty"` // Since: Bot API 6.9
+	// CanDeleteStories Optional. Pass True if the administrator can delete stories posted by other users
+	CanDeleteStories bool `json:"can_delete_stories,omitempty"` // Since: Bot API 6.9
+	// CanPostMessages Optional. Pass True if the administrator can post messages in the channel, approve
+	// suggested posts, or access channel statistics; for channels only
+	CanPostMessages bool `json:"can_post_messages,omitempty"`
+	// CanEditMessages Optional. Pass True if the administrator can edit messages of other users and can pin
+	// messages; for channels only
+	CanEditMessages bool `json:"can_edit_messages,omitempty"`
+	// CanPinMessages Optional. Pass True if the administrator can pin messages; for supergroups only
+	CanPinMessages bool `json:"can_pin_messages,omitempty"`
+	// CanManageTopics Optional. Pass True if the user is allowed to create, rename, close, and reopen forum
+	// topics; for supergroups only
+	CanManageTopics bool `json:"can_manage_topics,omitempty"` // Since: Bot API 6.3
+	// CanManageDirectMessages Optional. Pass True if the administrator can manage direct messages within the
+	// channel and decline suggested posts; for channels only
 	CanManageDirectMessages bool `json:"can_manage_direct_messages,omitempty"` // Since: Bot API 9.1
-	CanManageTags           bool `json:"can_manage_tags,omitempty"`            // Since: Bot API 9.5
+	// CanManageTags Optional. Pass True if the administrator can edit the tags of regular members; for groups
+	// and supergroups only
+	CanManageTags bool `json:"can_manage_tags,omitempty"` // Since: Bot API 9.5
 }
 
 // PromoteChatMember promotes or demotes a user in a chat.
@@ -134,8 +191,12 @@ func (api *API) PromoteChatMemberWithContext(ctx context.Context, params Promote
 // Since: Bot API 5.0
 // See https://core.telegram.org/bots/api#setchatadministratorcustomtitle
 type SetChatAdministratorCustomTitle struct {
-	ChatID      int64  `json:"chat_id"`
-	UserID      int64  `json:"user_id"`
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// UserID Required. Unique identifier of the target user
+	UserID int64 `json:"user_id"`
+	// CustomTitle Required. New custom title for the administrator; 0-16 characters, emoji are not allowed
 	CustomTitle string `json:"custom_title"`
 }
 
@@ -161,9 +222,13 @@ func (api *API) SetChatAdministratorCustomTitleWithContext(ctx context.Context,
 // Since: Bot API 9.5
 // See https://core.telegram.org/bots/api#setchatmembertag
 type SetChatMemberTag struct {
-	ChatID int64  `json:"chat_id"`
-	UserID int64  `json:"user_id"`
-	Tag    string `json:"tag,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// UserID Required. Unique identifier of the target user
+	UserID int64 `json:"user_id"`
+	// Tag Optional. New tag for the member; 0-16 characters, emoji are not allowed
+	Tag string `json:"tag,omitempty"`
 }
 
 // SetChatMemberTag sets a tag for a chat member.
@@ -188,7 +253,10 @@ func (api *API) SetChatMemberTagWithContext(ctx context.Context, params SetChatM
 // Since: Bot API 5.6
 // See https://core.telegram.org/bots/api#banchatsenderchat
 type BanChatSenderChat struct {
-	ChatID       int64 `json:"chat_id"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// SenderChatID Required. Unique identifier of the target sender chat
 	SenderChatID int64 `json:"sender_chat_id"`
 }
 
@@ -214,7 +282,10 @@ func (api *API) BanChatSenderChatWithContext(ctx context.Context, params BanChat
 // Since: Bot API 5.6
 // See https://core.telegram.org/bots/api#unbanchatsenderchat
 type UnbanChatSenderChat struct {
-	ChatID       int64 `json:"chat_id"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// SenderChatID Required. Unique identifier of the target sender chat
 	SenderChatID int64 `json:"sender_chat_id"`
 }
 
@@ -240,9 +311,17 @@ func (api *API) UnbanChatSenderChatWithContext(ctx context.Context, params Unban
 // Since: Bot API 4.4
 // See https://core.telegram.org/bots/api#setchatpermissions
 type SetChatPermissions struct {
-	ChatID                        int64           `json:"chat_id"`
-	Permissions                   ChatPermissions `json:"permissions"`
-	UseIndependentChatPermissions bool            `json:"use_independent_chat_permissions,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// Permissions Required. A JSON-serialized object for new default chat permissions
+	Permissions ChatPermissions `json:"permissions"`
+	// UseIndependentChatPermissions Optional. Pass True if chat permissions are set independently. Otherwise,
+	// the can_send_other_messages and can_add_web_page_previews permissions will imply the can_send_messages,
+	// can_send_audios, can_send_documents, can_send_photos, can_send_videos, can_send_video_notes, and
+	// can_send_voice_notes permissions; the can_send_polls permission will imply the can_send_messages
+	// permission.
+	UseIndependentChatPermissions bool `json:"use_independent_chat_permissions,omitempty"`
 }
 
 // SetChatPermissions sets default chat permissions for all members.
@@ -267,6 +346,8 @@ func (api *API) SetChatPermissionsWithContext(ctx context.Context, params SetCha
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#exportchatinvitelink
 type ExportChatInviteLink struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
 	ChatID int64 `json:"chat_id"`
 }
 
@@ -292,11 +373,19 @@ func (api *API) ExportChatInviteLinkWithContext(ctx context.Context, params Expo
 // Since: Bot API 5.1
 // See https://core.telegram.org/bots/api#createchatinvitelink
 type CreateChatInviteLink struct {
-	ChatID             int64   `json:"chat_id"`
-	Name               *string `json:"name,omitempty"`
-	ExpireDate         int     `json:"expire_date,omitempty"`
-	MemberLimit        int     `json:"member_limit,omitempty"`
-	CreatesJoinRequest bool    `json:"creates_join_request,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// Name Optional. Invite link name; 0-32 characters
+	Name *string `json:"name,omitempty"`
+	// ExpireDate Optional. Point in time (Unix timestamp) when the link will expire
+	ExpireDate int `json:"expire_date,omitempty"`
+	// MemberLimit Optional. The maximum number of users that can be members of the chat simultaneously after
+	// joining the chat via this invite link; 1-99999
+	MemberLimit int `json:"member_limit,omitempty"`
+	// CreatesJoinRequest Optional. True, if users joining the chat via the link need to be approved by chat
+	// administrators. If True, member_limit can't be specified.
+	CreatesJoinRequest bool `json:"creates_join_request,omitempty"`
 }
 
 // CreateChatInviteLink creates an additional invite link for a chat.
@@ -321,13 +410,22 @@ func (api *API) CreateChatInviteLinkWithContext(ctx context.Context, params Crea
 // Since: Bot API 5.1
 // See https://core.telegram.org/bots/api#editchatinvitelink
 type EditChatInviteLink struct {
-	ChatID     int64  `json:"chat_id"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// InviteLink Required. The invite link to edit
 	InviteLink string `json:"invite_link"`
 
-	Name               string `json:"name,omitempty"`
-	ExpireDate         int    `json:"expire_date,omitempty"`
-	MemberLimit        int    `json:"member_limit,omitempty"`
-	CreatesJoinRequest bool   `json:"creates_join_request,omitempty"`
+	// Name Optional. Invite link name; 0-32 characters
+	Name string `json:"name,omitempty"`
+	// ExpireDate Optional. Point in time (Unix timestamp) when the link will expire
+	ExpireDate int `json:"expire_date,omitempty"`
+	// MemberLimit Optional. The maximum number of users that can be members of the chat simultaneously after
+	// joining the chat via this invite link; 1-99999
+	MemberLimit int `json:"member_limit,omitempty"`
+	// CreatesJoinRequest Optional. True, if users joining the chat via the link need to be approved by chat
+	// administrators. If True, member_limit can't be specified.
+	CreatesJoinRequest bool `json:"creates_join_request,omitempty"`
 }
 
 // EditChatInviteLink edits a non‑primary invite link.
@@ -352,10 +450,17 @@ func (api *API) EditChatInviteLinkWithContext(ctx context.Context, params EditCh
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#createchatsubscriptioninvitelink
 type CreateChatSubscriptionInviteLink struct {
-	ChatID             int64  `json:"chat_id"`
-	Name               string `json:"name,omitempty"`
-	SubscriptionPeriod int    `json:"subscription_period,omitempty"`
-	SubscriptionPrice  int    `json:"subscription_price,omitempty"`
+	// ChatID Required. Unique identifier for the target channel chat or username of the target channel in the
+	// format @username
+	ChatID int64 `json:"chat_id"`
+	// Name Optional. Invite link name; 0-32 characters
+	Name string `json:"name,omitempty"`
+	// SubscriptionPeriod Required. The number of seconds the subscription will be active for before the next
+	// payment. Currently, it must always be 2592000 (30 days).
+	SubscriptionPeriod int `json:"subscription_period,omitempty"`
+	// SubscriptionPrice Required. The amount of Telegram Stars a user must pay initially and after each
+	// subsequent subscription period to be a member of the chat; 1-10000
+	SubscriptionPrice int `json:"subscription_price,omitempty"`
 }
 
 // CreateChatSubscriptionInviteLink creates a subscription invite link for a channel chat.
@@ -380,9 +485,13 @@ func (api *API) CreateChatSubscriptionInviteLinkWithContext(ctx context.Context,
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#editchatsubscriptioninvitelink
 type EditChatSubscriptionInviteLink struct {
-	ChatID     int64  `json:"chat_id"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// InviteLink Required. The invite link to edit
 	InviteLink string `json:"invite_link"`
-	Name       string `json:"name,omitempty"`
+	// Name Optional. Invite link name; 0-32 characters
+	Name string `json:"name,omitempty"`
 }
 
 // EditChatSubscriptionInviteLink edits a subscription invite link.
@@ -407,7 +516,10 @@ func (api *API) EditChatSubscriptionInviteLinkWithContext(ctx context.Context, p
 // Since: Bot API 5.1
 // See https://core.telegram.org/bots/api#revokechatinvitelink
 type RevokeChatInviteLink struct {
-	ChatID     int64  `json:"chat_id"`
+	// ChatID Required. Unique identifier of the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// InviteLink Required. The invite link to revoke
 	InviteLink string `json:"invite_link"`
 }
 
@@ -433,7 +545,10 @@ func (api *API) RevokeChatInviteLinkWithContext(ctx context.Context, params Revo
 // Since: Bot API 5.4
 // See https://core.telegram.org/bots/api#approvechatjoinrequest
 type ApproveChatJoinRequest struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
 	ChatID int64 `json:"chat_id"`
+	// UserID Required. Unique identifier of the target user
 	UserID int64 `json:"user_id"`
 }
 
@@ -459,7 +574,10 @@ func (api *API) ApproveChatJoinRequestWithContext(ctx context.Context, params Ap
 // Since: Bot API 5.4
 // See https://core.telegram.org/bots/api#declinechatjoinrequest
 type DeclineChatJoinRequest struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
 	ChatID int64 `json:"chat_id"`
+	// UserID Required. Unique identifier of the target user
 	UserID int64 `json:"user_id"`
 }
 
@@ -481,10 +599,83 @@ func (api *API) DeclineChatJoinRequestWithContext(ctx context.Context, params De
 	return req.DoWithContext(ctx, api)
 }
 
+// ChatJoinRequestQueryResult is the verdict passed to answerChatJoinRequestQuery.
+// Since: Bot API 10.1
+type ChatJoinRequestQueryResult string
+
+const (
+	// JoinRequestApprove allows the user to join the chat.
+	JoinRequestApprove ChatJoinRequestQueryResult = "approve"
+	// JoinRequestDecline disallows the user to join the chat.
+	JoinRequestDecline ChatJoinRequestQueryResult = "decline"
+	// JoinRequestQueue leaves the decision to other administrators.
+	JoinRequestQueue ChatJoinRequestQueryResult = "queue"
+)
+
+// AnswerChatJoinRequestQuery holds parameters for the answerChatJoinRequestQuery method.
+// Since: Bot API 10.1
+// See https://core.telegram.org/bots/api#answerchatjoinrequestquery
+type AnswerChatJoinRequestQuery struct {
+	// ChatJoinRequestQueryID identifies the chat join request query.
+	ChatJoinRequestQueryID string `json:"chat_join_request_query_id"`
+	// Result contains the decision for the join request query.
+	Result ChatJoinRequestQueryResult `json:"result"`
+}
+
+// AnswerChatJoinRequestQuery processes a received chat join request query.
+// Since: Bot API 10.1
+// Returns True on success.
+// See https://core.telegram.org/bots/api#answerchatjoinrequestquery
+func (api *API) AnswerChatJoinRequestQuery(params AnswerChatJoinRequestQuery) (bool, error) {
+	req := NewRequest[bool]("answerChatJoinRequestQuery", params)
+	return req.Do(api)
+}
+
+// AnswerChatJoinRequestQueryWithContext is the context-aware variant of AnswerChatJoinRequestQuery.
+// Since: Bot API 10.1
+// It executes the same request but uses ctx for cancellation and deadlines.
+// See https://core.telegram.org/bots/api#answerchatjoinrequestquery
+func (api *API) AnswerChatJoinRequestQueryWithContext(ctx context.Context, params AnswerChatJoinRequestQuery) (bool, error) {
+	req := NewRequest[bool]("answerChatJoinRequestQuery", params)
+	return req.DoWithContext(ctx, api)
+}
+
+// SendChatJoinRequestWebApp holds parameters for the sendChatJoinRequestWebApp method.
+// Since: Bot API 10.1
+// See https://core.telegram.org/bots/api#sendchatjoinrequestwebapp
+type SendChatJoinRequestWebApp struct {
+	// ChatJoinRequestQueryID identifies the chat join request query.
+	ChatJoinRequestQueryID string `json:"chat_join_request_query_id"`
+	// WebAppURL is the HTTPS URL of the Mini App to open.
+	WebAppURL string `json:"web_app_url"`
+}
+
+// SendChatJoinRequestWebApp shows a Mini App to the user before deciding a
+// join request query; resolve the query with AnswerChatJoinRequestQuery based
+// on the Mini App interaction.
+// Since: Bot API 10.1
+// Returns True on success.
+// See https://core.telegram.org/bots/api#sendchatjoinrequestwebapp
+func (api *API) SendChatJoinRequestWebApp(params SendChatJoinRequestWebApp) (bool, error) {
+	req := NewRequest[bool]("sendChatJoinRequestWebApp", params)
+	return req.Do(api)
+}
+
+// SendChatJoinRequestWebAppWithContext is the context-aware variant of SendChatJoinRequestWebApp.
+// Since: Bot API 10.1
+// It executes the same request but uses ctx for cancellation and deadlines.
+// See https://core.telegram.org/bots/api#sendchatjoinrequestwebapp
+func (api *API) SendChatJoinRequestWebAppWithContext(ctx context.Context, params SendChatJoinRequestWebApp) (bool, error) {
+	req := NewRequest[bool]("sendChatJoinRequestWebApp", params)
+	return req.DoWithContext(ctx, api)
+}
+
 // SetChatPhoto holds parameters for the setChatPhoto method.
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#setchatphoto
 type SetChatPhoto struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
 	ChatID int64 `json:"chat_id"`
 }
 
@@ -494,18 +685,29 @@ type SetChatPhoto struct {
 // Returns True on success.
 // See https://core.telegram.org/bots/api#setchatphoto
 func (api *API) SetChatPhoto(params SetChatPhoto, photo UploaderFile) (bool, error) {
+	return api.SetChatPhotoWithContext(context.Background(), params, photo)
+}
+
+// SetChatPhotoWithContext changes the chat photo using ctx for cancellation and deadlines.
+// Since: Bot API 3.1
+// photo is the file to upload as the new photo.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setchatphoto
+func (api *API) SetChatPhotoWithContext(ctx context.Context, params SetChatPhoto, photo UploaderFile) (bool, error) {
 	uploader := NewUploader(api)
 	defer func() {
 		_ = uploader.Close()
 	}()
 	req := NewUploaderRequestWithChatID[bool]("setChatPhoto", params, params.ChatID, photo.SetType(UploaderPhotoType))
-	return req.Do(uploader)
+	return req.DoWithContext(ctx, uploader)
 }
 
 // DeleteChatPhoto holds parameters for the deleteChatPhoto method.
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#deletechatphoto
 type DeleteChatPhoto struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
 	ChatID int64 `json:"chat_id"`
 }
 
@@ -531,8 +733,11 @@ func (api *API) DeleteChatPhotoWithContext(ctx context.Context, params DeleteCha
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#setchattitle
 type SetChatTitle struct {
-	ChatID int64  `json:"chat_id"`
-	Title  string `json:"title"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// Title Required. New chat title, 1-128 characters
+	Title string `json:"title"`
 }
 
 // SetChatTitle changes the chat title.
@@ -557,7 +762,10 @@ func (api *API) SetChatTitleWithContext(ctx context.Context, params SetChatTitle
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#setchatdescription
 type SetChatDescription struct {
-	ChatID      int64  `json:"chat_id"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// Description Optional. New chat description, 0-255 characters
 	Description string `json:"description"`
 }
 
@@ -583,10 +791,17 @@ func (api *API) SetChatDescriptionWithContext(ctx context.Context, params SetCha
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#pinchatmessage
 type PinChatMessage struct {
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be pinned
 	BusinessConnectionID *string `json:"business_connection_id,omitempty"`
-	ChatID               int64   `json:"chat_id"`
-	MessageID            int     `json:"message_id"`
-	DisableNotification  bool    `json:"disable_notification,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// MessageID Required. Identifier of a message to pin
+	MessageID int `json:"message_id"`
+	// DisableNotification Optional. Pass True if it is not necessary to send a notification to all chat members
+	// about the new pinned message. Notifications are always disabled in channels and private chats.
+	DisableNotification bool `json:"disable_notification,omitempty"`
 }
 
 // PinChatMessage pins a message in a chat.
@@ -611,9 +826,15 @@ func (api *API) PinChatMessageWithContext(ctx context.Context, params PinChatMes
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#unpinchatmessage
 type UnpinChatMessage struct {
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be unpinned
 	BusinessConnectionID *string `json:"business_connection_id,omitempty"`
-	ChatID               int64   `json:"chat_id"`
-	MessageID            int     `json:"message_id"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// MessageID Optional. Identifier of the message to unpin. Required if business_connection_id is specified.
+	// If not specified, the most recent pinned message (by sending date) will be unpinned.
+	MessageID int `json:"message_id"`
 }
 
 // UnpinChatMessage unpins a message in a chat.
@@ -638,6 +859,8 @@ func (api *API) UnpinChatMessageWithContext(ctx context.Context, params UnpinCha
 // Since: Bot API 5.0
 // See https://core.telegram.org/bots/api#unpinallchatmessages
 type UnpinAllChatMessages struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
 	ChatID int64 `json:"chat_id"`
 }
 
@@ -663,6 +886,9 @@ func (api *API) UnpinAllChatMessagesWithContext(ctx context.Context, params Unpi
 // Since: Bot API 2.1
 // See https://core.telegram.org/bots/api#leavechat
 type LeaveChat struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup or channel in
+	// the format @username. Channel direct messages chats aren't supported; leave the corresponding channel
+	// instead.
 	ChatID int64 `json:"chat_id"`
 }
 
@@ -688,6 +914,8 @@ func (api *API) LeaveChatWithContext(ctx context.Context, params LeaveChat) (boo
 // Since: Bot API 2.1
 // See https://core.telegram.org/bots/api#getchat
 type GetChat struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup or channel in
+	// the format @username
 	ChatID int64 `json:"chat_id"`
 }
 
@@ -712,8 +940,12 @@ func (api *API) GetChatWithContext(ctx context.Context, params GetChat) (ChatFul
 // Since: Bot API 2.1
 // See https://core.telegram.org/bots/api#getchatadministrators
 type GetChatAdministrators struct {
-	ChatID     int64 `json:"chat_id"`
-	ReturnBots bool  `json:"return_bots,omitempty"` // Since: Bot API 10.0
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup or channel in
+	// the format @username
+	ChatID int64 `json:"chat_id"`
+	// ReturnBots Optional. Pass True to additionally receive all bots that are administrators of the chat. By
+	// default, bots other than the current bot are omitted.
+	ReturnBots bool `json:"return_bots,omitempty"` // Since: Bot API 10.0
 }
 
 // GetChatAdministrators returns a list of administrators in a chat.
@@ -737,6 +969,8 @@ func (api *API) GetChatAdministratorsWithContext(ctx context.Context, params Get
 // Since: Bot API 2.1
 // See https://core.telegram.org/bots/api#getchatmembercount
 type GetChatMemberCount struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup or channel in
+	// the format @username
 	ChatID int64 `json:"chat_id"`
 }
 
@@ -761,7 +995,10 @@ func (api *API) GetChatMemberCountWithContext(ctx context.Context, params GetCha
 // Since: Bot API 2.1
 // See https://core.telegram.org/bots/api#getchatmember
 type GetChatMember struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup or channel in
+	// the format @username
 	ChatID int64 `json:"chat_id"`
+	// UserID Required. Unique identifier of the target user
 	UserID int64 `json:"user_id"`
 }
 
@@ -786,7 +1023,10 @@ func (api *API) GetChatMemberWithContext(ctx context.Context, params GetChatMemb
 // Since: Bot API 3.2
 // See https://core.telegram.org/bots/api#setchatstickerset
 type SetChatStickerSet struct {
-	ChatID         int64  `json:"chat_id"`
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// StickerSetName Required. Name of the sticker set to be set as the group sticker set
 	StickerSetName string `json:"sticker_set_name"`
 }
 
@@ -812,6 +1052,8 @@ func (api *API) SetChatStickerSetWithContext(ctx context.Context, params SetChat
 // Since: Bot API 3.2
 // See https://core.telegram.org/bots/api#deletechatstickerset
 type DeleteChatStickerSet struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup in the format
+	// @username
 	ChatID int64 `json:"chat_id"`
 }
 
@@ -837,7 +1079,9 @@ func (api *API) DeleteChatStickerSetWithContext(ctx context.Context, params Dele
 // Since: Bot API 7.0
 // See https://core.telegram.org/bots/api#getuserchatboosts
 type GetUserChatBoosts struct {
+	// ChatID Required. Unique identifier for the chat or username of the channel in the format @username
 	ChatID int64 `json:"chat_id"`
+	// UserID Required. Unique identifier of the target user
 	UserID int64 `json:"user_id"`
 }
 
@@ -862,17 +1106,36 @@ func (api *API) GetUserChatBoostsWithContext(ctx context.Context, params GetUser
 // Since: Bot API 9.3
 // See https://core.telegram.org/bots/api#getchatgifts
 type GetChatGifts struct {
-	ChatID                      int64  `json:"chat_id"`
-	ExcludeUnsaved              bool   `json:"exclude_unsaved,omitempty"`
-	ExcludeSaved                bool   `json:"exclude_saved,omitempty"`
-	ExcludeUnlimited            bool   `json:"exclude_unlimited,omitempty"`
-	ExcludeLimitedUpgradable    bool   `json:"exclude_limited_upgradable,omitempty"`
-	ExcludeLimitedNonUpgradable bool   `json:"exclude_limited_non_upgradable,omitempty"`
-	ExcludeUnique               bool   `json:"exclude_unique,omitempty"`
-	ExcludeFromBlockchain       bool   `json:"exclude_from_blockchain,omitempty"`
-	SortByPrice                 bool   `json:"sort_by_price,omitempty"`
-	Offset                      string `json:"offset,omitempty"`
-	Limit                       int    `json:"limit,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// ExcludeUnsaved Optional. Pass True to exclude gifts that aren't saved to the chat's profile page. Always
+	// True, unless the bot has the can_post_messages administrator right in the channel.
+	ExcludeUnsaved bool `json:"exclude_unsaved,omitempty"`
+	// ExcludeSaved Optional. Pass True to exclude gifts that are saved to the chat's profile page. Always
+	// False, unless the bot has the can_post_messages administrator right in the channel.
+	ExcludeSaved bool `json:"exclude_saved,omitempty"`
+	// ExcludeUnlimited Optional. Pass True to exclude gifts that can be purchased an unlimited number of times
+	ExcludeUnlimited bool `json:"exclude_unlimited,omitempty"`
+	// ExcludeLimitedUpgradable Optional. Pass True to exclude gifts that can be purchased a limited number of
+	// times and can be upgraded to unique
+	ExcludeLimitedUpgradable bool `json:"exclude_limited_upgradable,omitempty"`
+	// ExcludeLimitedNonUpgradable Optional. Pass True to exclude gifts that can be purchased a limited number
+	// of times and can't be upgraded to unique
+	ExcludeLimitedNonUpgradable bool `json:"exclude_limited_non_upgradable,omitempty"`
+	// ExcludeUnique Optional. Pass True to exclude unique gifts
+	ExcludeUnique bool `json:"exclude_unique,omitempty"`
+	// ExcludeFromBlockchain Optional. Pass True to exclude gifts that were assigned from the TON blockchain and
+	// can't be resold or transferred in Telegram
+	ExcludeFromBlockchain bool `json:"exclude_from_blockchain,omitempty"`
+	// SortByPrice Optional. Pass True to sort results by gift price instead of send date. Sorting is applied
+	// before pagination.
+	SortByPrice bool `json:"sort_by_price,omitempty"`
+	// Offset Optional. Offset of the first entry to return as received from the previous request; use an empty
+	// string to get the first chunk of results
+	Offset string `json:"offset,omitempty"`
+	// Limit Optional. The maximum number of gifts to be returned; 1-100. Defaults to 100.
+	Limit int `json:"limit,omitempty"`
 }
 
 // GetChatGifts returns gifts owned by a chat.

tgapi/chat_types.go

@@ -4,14 +4,25 @@ package tgapi
 // Since: Bot API 1.0
 // See https://core.telegram.org/bots/api#chat
 type Chat struct {
-	ID               int64    `json:"id"`
-	Type             ChatType `json:"type"`
-	Title            *string  `json:"title,omitempty"`
-	Username         *string  `json:"username,omitempty"`
-	FirstName        *string  `json:"first_name,omitempty"`
-	LastName         *string  `json:"last_name,omitempty"`
-	IsForum          *bool    `json:"is_forum,omitempty"`           // Since: Bot API 6.3
-	IsDirectMessages *bool    `json:"is_direct_messages,omitempty"` // Since: Bot API 9.2
+	// ID Unique identifier for this chat. This number may have more than 32 significant bits and some
+	// programming languages may have difficulty/silent defects in interpreting it. But it has at most 52
+	// significant bits, so a signed 64-bit integer or double-precision float type are safe for storing this
+	// identifier.
+	ID int64 `json:"id"`
+	// Type Type of the chat, can be either “private”, “group”, “supergroup” or “channel”
+	Type ChatType `json:"type"`
+	// Title Optional. Title, for supergroups, channels and group chats
+	Title *string `json:"title,omitempty"`
+	// Username Optional. Username, for private chats, supergroups and channels if available
+	Username *string `json:"username,omitempty"`
+	// FirstName Optional. First name of the other party in a private chat
+	FirstName *string `json:"first_name,omitempty"`
+	// LastName Optional. Last name of the other party in a private chat
+	LastName *string `json:"last_name,omitempty"`
+	// IsForum Optional. True, if the supergroup chat is a forum (has topics enabled)
+	IsForum *bool `json:"is_forum,omitempty"` // Since: Bot API 6.3
+	// IsDirectMessages Optional. True, if the chat is the direct messages chat of a channel
+	IsDirectMessages *bool `json:"is_direct_messages,omitempty"` // Since: Bot API 9.2
 }
 
 // ChatType represents the type of a chat.
@@ -32,123 +43,255 @@ const (
 // Since: Bot API 7.5
 // See https://core.telegram.org/bots/api#chatfullinfo
 type ChatFullInfo struct {
-	ID               int64      `json:"id"`
-	Type             ChatType   `json:"type"`
-	Title            string     `json:"title"`
-	Username         string     `json:"username"`
-	FirstName        string     `json:"first_name"`
-	LastName         string     `json:"last_name"`
-	IsForum          bool       `json:"is_forum"`
-	IsDirectMessages bool       `json:"is_direct_messages"`
-	AccentColorID    int        `json:"accent_color_id"`
-	MaxReactionCount int        `json:"max_reaction_count"`
-	Photo            *ChatPhoto `json:"photo,omitempty"`
-	ActiveUsernames  []string   `json:"active_usernames,omitempty"`
-	Birthdate        *Birthdate `json:"birthdate,omitempty"`
+	// ID Unique identifier for this chat. This number may have more than 32 significant bits and some
+	// programming languages may have difficulty/silent defects in interpreting it. But it has at most 52
+	// significant bits, so a signed 64-bit integer or double-precision float type are safe for storing this
+	// identifier.
+	ID int64 `json:"id"`
+	// Type Type of the chat, can be either “private”, “group”, “supergroup” or “channel”
+	Type ChatType `json:"type"`
+	// Title Optional. Title, for supergroups, channels and group chats
+	Title string `json:"title"`
+	// Username Optional. Username, for private chats, supergroups and channels if available
+	Username string `json:"username"`
+	// FirstName Optional. First name of the other party in a private chat
+	FirstName string `json:"first_name"`
+	// LastName Optional. Last name of the other party in a private chat
+	LastName string `json:"last_name"`
+	// IsForum Optional. True, if the supergroup chat is a forum (has topics enabled)
+	IsForum bool `json:"is_forum"`
+	// IsDirectMessages Optional. True, if the chat is the direct messages chat of a channel
+	IsDirectMessages bool `json:"is_direct_messages"`
+	// AccentColorID Identifier of the accent color for the chat name and backgrounds of the chat photo, reply
+	// header, and link preview. See accent colors for more details.
+	AccentColorID int `json:"accent_color_id"`
+	// MaxReactionCount The maximum number of reactions that can be set on a message in the chat
+	MaxReactionCount int `json:"max_reaction_count"`
+	// Photo Optional. Chat photo
+	Photo *ChatPhoto `json:"photo,omitempty"`
+	// ActiveUsernames Optional. If non-empty, the list of all active chat usernames; for private chats,
+	// supergroups and channels
+	ActiveUsernames []string `json:"active_usernames,omitempty"`
+	// Birthdate Optional. For private chats, the date of birth of the user
+	Birthdate *Birthdate `json:"birthdate,omitempty"`
 
-	BusinessIntro        *BusinessIntro        `json:"business_intro,omitempty"`
-	BusinessLocation     *BusinessLocation     `json:"business_location,omitempty"`
+	// BusinessIntro Optional. For private chats with business accounts, the intro of the business
+	BusinessIntro *BusinessIntro `json:"business_intro,omitempty"`
+	// BusinessLocation Optional. For private chats with business accounts, the location of the business
+	BusinessLocation *BusinessLocation `json:"business_location,omitempty"`
+	// BusinessOpeningHours Optional. For private chats with business accounts, the opening hours of the
+	// business
 	BusinessOpeningHours *BusinessOpeningHours `json:"business_opening_hours,omitempty"`
 
+	// PersonalChat Optional. For private chats, the personal channel of the user
 	PersonalChat *Chat `json:"personal_chat,omitempty"`
-	ParentChat   *Chat `json:"parent_chat,omitempty"` // Since: Bot API 9.2
+	// ParentChat Optional. Information about the corresponding channel chat; for direct messages chats only
+	ParentChat *Chat `json:"parent_chat,omitempty"` // Since: Bot API 9.2
 
-	AvailableReaction []ReactionType `json:"available_reaction,omitempty"`
+	// AvailableReaction Optional. List of available reactions allowed in the chat. If omitted, then all emoji
+	// reactions are allowed.
+	// Subject to change in v2: the Go field name may be pluralized to AvailableReactions.
+	AvailableReaction []ReactionType `json:"available_reactions,omitempty"`
 
-	BackgroundCustomEmojiID        *string `json:"background_custom_emoji_id,omitempty"`
-	ProfileAccentColorID           *int    `json:"profile_accent_color_id,omitempty"`
+	// BackgroundCustomEmojiID Optional. Custom emoji identifier of the emoji chosen by the chat for the reply
+	// header and link preview background
+	BackgroundCustomEmojiID *string `json:"background_custom_emoji_id,omitempty"`
+	// ProfileAccentColorID Optional. Identifier of the accent color for the chat's profile background. See
+	// profile accent colors for more details.
+	ProfileAccentColorID *int `json:"profile_accent_color_id,omitempty"`
+	// ProfileBackgroundCustomEmojiID Optional. Custom emoji identifier of the emoji chosen by the chat for its
+	// profile background
 	ProfileBackgroundCustomEmojiID *string `json:"profile_background_custom_emoji_id,omitempty"`
-	EmojiStatusCustomEmojiID       *string `json:"emoji_status_custom_emoji_id,omitempty"`
-	EmojiStatusExpirationDate      *int    `json:"emoji_status_expiration_date,omitempty"`
+	// EmojiStatusCustomEmojiID Optional. Custom emoji identifier of the emoji status of the chat or the other
+	// party in a private chat
+	EmojiStatusCustomEmojiID *string `json:"emoji_status_custom_emoji_id,omitempty"`
+	// EmojiStatusExpirationDate Optional. Expiration date of the emoji status of the chat or the other party in
+	// a private chat, in Unix time, if any
+	EmojiStatusExpirationDate *int `json:"emoji_status_expiration_date,omitempty"`
 
-	Bio                                *string `json:"bio,omitempty"`
-	HasPrivateForwards                 *bool   `json:"has_private_forwards,omitempty"`
-	HasRestrictedVoiceAndVideoMessages *bool   `json:"has_restricted_voice_and_video_messages,omitempty"`
-	JoinToSendMessages                 *bool   `json:"join_to_send_messages,omitempty"`
-	JoinByRequest                      *bool   `json:"join_by_request,omitempty"`
+	// Bio Optional. Bio of the other party in a private chat
+	Bio *string `json:"bio,omitempty"`
+	// HasPrivateForwards Optional. True, if privacy settings of the other party in the private chat allows to
+	// use tg://user?id=<user_id> links only in chats with the user
+	HasPrivateForwards *bool `json:"has_private_forwards,omitempty"`
+	// HasRestrictedVoiceAndVideoMessages Optional. True, if the privacy settings of the other party restrict
+	// sending voice and video note messages in the private chat
+	HasRestrictedVoiceAndVideoMessages *bool `json:"has_restricted_voice_and_video_messages,omitempty"`
+	// JoinToSendMessages Optional. True, if users need to join the supergroup before they can send messages
+	JoinToSendMessages *bool `json:"join_to_send_messages,omitempty"`
+	// JoinByRequest Optional. True, if all users directly joining the supergroup without using an invite link
+	// need to be approved by supergroup administrators
+	JoinByRequest *bool `json:"join_by_request,omitempty"`
 
-	Description       *string            `json:"description,omitempty"`
-	InviteLink        *string            `json:"invite_link,omitempty"`
-	PinnedMessage     *Message           `json:"pinned_message,omitempty"`
-	Permissions       *ChatPermissions   `json:"permissions,omitempty"`
+	// Description Optional. Description, for groups, supergroups and channel chats
+	Description *string `json:"description,omitempty"`
+	// InviteLink Optional. Primary invite link, for groups, supergroups and channel chats
+	InviteLink *string `json:"invite_link,omitempty"`
+	// PinnedMessage Optional. The most recent pinned message (by sending date)
+	PinnedMessage *Message `json:"pinned_message,omitempty"`
+	// Permissions Optional. Default chat member permissions, for groups and supergroups
+	Permissions *ChatPermissions `json:"permissions,omitempty"`
+	// AcceptedGiftTypes Information about types of gifts that are accepted by the chat or by the corresponding
+	// user for private chats
 	AcceptedGiftTypes *AcceptedGiftTypes `json:"accepted_gift_types,omitempty"`
 
-	CanSendPaidMedia             *bool   `json:"can_send_paid_media,omitempty"`
-	SlowModeDelay                *int    `json:"slow_mode_delay,omitempty"`
-	UnrestrictedBoostCount       *int    `json:"unrestricted_boost_count,omitempty"`
-	MessageAutoDeleteTime        *int    `json:"message_auto_delete_time,omitempty"`
-	HasAggressiveAntiSpamEnabled *bool   `json:"has_aggressive_anti_spam_enabled,omitempty"`
-	HasHiddenMembers             *bool   `json:"has_hidden_members,omitempty"`
-	HasProtectedContent          *bool   `json:"has_protected_content,omitempty"`
-	HasVisibleHistory            *bool   `json:"has_visible_history,omitempty"`
-	StickerSetName               *string `json:"sticker_set_name,omitempty"`
-	CanSetStickerSet             *bool   `json:"can_set_sticker_set,omitempty"`
-	CustomEmojiStickerSetName    *string `json:"custom_emoji_sticker_set_name,omitempty"`
-	LinkedChatID                 *int64  `json:"linked_chat_id,omitempty"`
+	// CanSendPaidMedia Optional. True, if paid media messages can be sent or forwarded to the channel chat. The
+	// field is available only for channel chats.
+	CanSendPaidMedia *bool `json:"can_send_paid_media,omitempty"`
+	// SlowModeDelay Optional. For supergroups, the minimum allowed delay between consecutive messages sent by
+	// each unprivileged user; in seconds
+	SlowModeDelay *int `json:"slow_mode_delay,omitempty"`
+	// UnrestrictedBoostCount is the number of unrestricted boosts available to the chat.
+	UnrestrictedBoostCount *int `json:"unrestricted_boost_count,omitempty"`
+	// MessageAutoDeleteTime Optional. The time after which all messages sent to the chat will be automatically
+	// deleted; in seconds
+	MessageAutoDeleteTime *int `json:"message_auto_delete_time,omitempty"`
+	// HasAggressiveAntiSpamEnabled Optional. True, if aggressive anti-spam checks are enabled in the
+	// supergroup. The field is only available to chat administrators.
+	HasAggressiveAntiSpamEnabled *bool `json:"has_aggressive_anti_spam_enabled,omitempty"`
+	// HasHiddenMembers Optional. True, if non-administrators can only get the list of bots and administrators
+	// in the chat
+	HasHiddenMembers *bool `json:"has_hidden_members,omitempty"`
+	// HasProtectedContent Optional. True, if messages from the chat can't be forwarded to other chats
+	HasProtectedContent *bool `json:"has_protected_content,omitempty"`
+	// HasVisibleHistory Optional. True, if new chat members will have access to old messages; available only to
+	// chat administrators
+	HasVisibleHistory *bool `json:"has_visible_history,omitempty"`
+	// StickerSetName Optional. For supergroups, name of the group sticker set
+	StickerSetName *string `json:"sticker_set_name,omitempty"`
+	// CanSetStickerSet Optional. True, if the bot can change the group sticker set
+	CanSetStickerSet *bool `json:"can_set_sticker_set,omitempty"`
+	// CustomEmojiStickerSetName Optional. For supergroups, the name of the group's custom emoji sticker set.
+	// Custom emoji from this set can be used by all users and bots in the group.
+	CustomEmojiStickerSetName *string `json:"custom_emoji_sticker_set_name,omitempty"`
+	// LinkedChatID Optional. Unique identifier for the linked chat, i.e. the discussion group identifier for a
+	// channel and vice versa; for supergroups and channel chats. This identifier may be greater than 32 bits
+	// and some programming languages may have difficulty/silent defects in interpreting it. But it is smaller
+	// than 52 bits, so a signed 64 bit integer or double-precision float type are safe for storing this
+	// identifier.
+	LinkedChatID *int64 `json:"linked_chat_id,omitempty"`
 
-	Location             *ChatLocation     `json:"location,omitempty"`
-	Rating               *UserRating       `json:"rating,omitempty"`
-	FirstProfileAudio    *Audio            `json:"first_profile_audio,omitempty"`     // Since: Bot API 9.4
-	UniqueGiftColors     *UniqueGiftColors `json:"unique_gift_colors,omitempty"`      // Since: Bot API 9.3
-	PaidMessageStarCount *int              `json:"paid_message_star_count,omitempty"` // Since: Bot API 9.3
+	// Location Optional. For supergroups, the location to which the supergroup is connected
+	Location *ChatLocation `json:"location,omitempty"`
+	// Rating Optional. For private chats, the rating of the user if any
+	Rating *UserRating `json:"rating,omitempty"`
+	// FirstProfileAudio Optional. For private chats, the first audio added to the profile of the user
+	FirstProfileAudio *Audio `json:"first_profile_audio,omitempty"` // Since: Bot API 9.4
+	// UniqueGiftColors Optional. The color scheme based on a unique gift that must be used for the chat's name,
+	// message replies and link previews
+	UniqueGiftColors *UniqueGiftColors `json:"unique_gift_colors,omitempty"` // Since: Bot API 9.3
+	// PaidMessageStarCount Optional. The number of Telegram Stars a general user has to pay to send a message
+	// to the chat
+	PaidMessageStarCount *int `json:"paid_message_star_count,omitempty"` // Since: Bot API 9.3
+	// GuardBot contains the guard bot visible to chat administrators.
+	GuardBot *User `json:"guard_bot,omitempty"` // Since: Bot API 10.1; visible to chat administrators only
+	// Community contains information about the affected community.
+	Community *Community `json:"community,omitempty"` // Since: Bot API 10.2
 }
 
 // ChatPhoto represents a chat photo.
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#chatphoto
 type ChatPhoto struct {
-	SmallFileID       string `json:"small_file_id"`
+	// SmallFileID File identifier of small (160x160) chat photo. This file_id can be used only for photo
+	// download and only for as long as the photo is not changed.
+	SmallFileID string `json:"small_file_id"`
+	// SmallFileUniqueID Unique file identifier of small (160x160) chat photo, which is supposed to be the same
+	// over time and for different bots. Can't be used to download or reuse the file.
 	SmallFileUniqueID string `json:"small_file_unique_id"`
-	BigFileID         string `json:"big_file_id"`
-	BigFileUniqueID   string `json:"big_file_unique_id"`
+	// BigFileID File identifier of big (640x640) chat photo. This file_id can be used only for photo download
+	// and only for as long as the photo is not changed.
+	BigFileID string `json:"big_file_id"`
+	// BigFileUniqueID Unique file identifier of big (640x640) chat photo, which is supposed to be the same over
+	// time and for different bots. Can't be used to download or reuse the file.
+	BigFileUniqueID string `json:"big_file_unique_id"`
 }
 
 // ChatPermissions describes actions that a non‑administrator user is allowed to take in a chat.
 // Since: Bot API 4.4
 // See https://core.telegram.org/bots/api#chatpermissions
 type ChatPermissions struct {
-	CanSendMessages      bool `json:"can_send_messages"`
-	CanSendAudios        bool `json:"can_send_audios"`      // Since: Bot API 6.5
-	CanSendDocuments     bool `json:"can_send_documents"`   // Since: Bot API 6.5
-	CanSendPhotos        bool `json:"can_send_photos"`      // Since: Bot API 6.5
-	CanSendVideos        bool `json:"can_send_videos"`      // Since: Bot API 6.5
-	CanSendVideoNotes    bool `json:"can_send_video_notes"` // Since: Bot API 6.5
-	CanSendVoiceNotes    bool `json:"can_send_voice_notes"` // Since: Bot API 6.5
-	CanSendPolls         bool `json:"can_send_polls"`
+	// CanSendMessages Optional. True, if the user is allowed to send text messages, rich messages, contacts,
+	// giveaways, giveaway winners, invoices, locations and venues
+	CanSendMessages bool `json:"can_send_messages"`
+	// CanSendAudios Optional. True, if the user is allowed to send audios
+	CanSendAudios bool `json:"can_send_audios"` // Since: Bot API 6.5
+	// CanSendDocuments Optional. True, if the user is allowed to send documents
+	CanSendDocuments bool `json:"can_send_documents"` // Since: Bot API 6.5
+	// CanSendPhotos Optional. True, if the user is allowed to send photos
+	CanSendPhotos bool `json:"can_send_photos"` // Since: Bot API 6.5
+	// CanSendVideos Optional. True, if the user is allowed to send videos
+	CanSendVideos bool `json:"can_send_videos"` // Since: Bot API 6.5
+	// CanSendVideoNotes Optional. True, if the user is allowed to send video notes
+	CanSendVideoNotes bool `json:"can_send_video_notes"` // Since: Bot API 6.5
+	// CanSendVoiceNotes Optional. True, if the user is allowed to send voice notes
+	CanSendVoiceNotes bool `json:"can_send_voice_notes"` // Since: Bot API 6.5
+	// CanSendPolls Optional. True, if the user is allowed to send polls and checklists
+	CanSendPolls bool `json:"can_send_polls"`
+	// CanSendOtherMessages Optional. True, if the user is allowed to send animations, games, stickers and use
+	// inline bots
 	CanSendOtherMessages bool `json:"can_send_other_messages"`
+	// CanAddWebPagePreview Optional. True, if the user is allowed to add web page previews to their messages
 	CanAddWebPagePreview bool `json:"can_add_web_page_previews"`
-	CanReactToMessages   bool `json:"can_react_to_messages"` // Since: Bot API 10.0
-	CanEditTag           bool `json:"can_edit_tag"`          // Since: Bot API 9.5
-	CanChangeInfo        bool `json:"can_change_info"`
-	CanInviteUsers       bool `json:"can_invite_users"`
-	CanPinMessages       bool `json:"can_pin_messages"`
-	CanManageTopics      bool `json:"can_manage_topics"` // Since: Bot API 6.3
+	// CanReactToMessages Optional. True, if the user is allowed to react to messages. If omitted, defaults to
+	// the value of can_send_messages.
+	CanReactToMessages bool `json:"can_react_to_messages"` // Since: Bot API 10.0
+	// CanEditTag Optional. True, if the user is allowed to edit their own tag. If omitted, defaults to the
+	// value of can_pin_messages.
+	CanEditTag bool `json:"can_edit_tag"` // Since: Bot API 9.5
+	// CanChangeInfo Optional. True, if the user is allowed to change the chat title, photo and other settings.
+	// Ignored in public supergroups.
+	CanChangeInfo bool `json:"can_change_info"`
+	// CanInviteUsers Optional. True, if the user is allowed to invite new users to the chat
+	CanInviteUsers bool `json:"can_invite_users"`
+	// CanPinMessages Optional. True, if the user is allowed to pin messages. Ignored in public supergroups.
+	CanPinMessages bool `json:"can_pin_messages"`
+	// CanManageTopics Optional. True, if the user is allowed to create forum topics. If omitted, defaults to
+	// the value of can_pin_messages.
+	CanManageTopics bool `json:"can_manage_topics"` // Since: Bot API 6.3
 }
 
 // ChatLocation represents a location to which a chat is connected.
 // Since: Bot API 5.0
 // See https://core.telegram.org/bots/api#chatlocation
 type ChatLocation struct {
+	// Location The location to which the supergroup is connected. Can't be a live location.
 	Location Location `json:"location"`
-	Address  string   `json:"address"`
+	// Address Location address; 1-64 characters, as defined by the chat owner
+	Address string `json:"address"`
 }
 
 // ChatInviteLink represents an invite link for a chat.
 // Since: Bot API 5.1
 // See https://core.telegram.org/bots/api#chatinvitelink
 type ChatInviteLink struct {
-	InviteLink        string `json:"invite_link"`
-	Creator           User   `json:"creator"`
-	CreateJoinRequest bool   `json:"creates_join_request"`
-	IsPrimary         bool   `json:"is_primary"`
-	IsRevoked         bool   `json:"is_revoked"`
+	// InviteLink The invite link. If the link was created by another chat administrator, then the second part
+	// of the link will be replaced with “…”.
+	InviteLink string `json:"invite_link"`
+	// Creator Creator of the link
+	Creator User `json:"creator"`
+	// CreateJoinRequest True, if users joining the chat via the link need to be approved by chat administrators
+	CreateJoinRequest bool `json:"creates_join_request"`
+	// IsPrimary True, if the link is primary
+	IsPrimary bool `json:"is_primary"`
+	// IsRevoked True, if the link is revoked
+	IsRevoked bool `json:"is_revoked"`
 
-	Name                    *string `json:"name,omitempty"`
-	ExpireDate              *int    `json:"expire_date,omitempty"`
-	MemberLimit             *int    `json:"member_limit,omitempty"`
-	PendingJoinRequestCount *int    `json:"pending_join_request_count,omitempty"`
-	SubscriptionPeriod      *int    `json:"subscription_period,omitempty"`
-	SubscriptionPrice       *int    `json:"subscription_price,omitempty"`
+	// Name Optional. Invite link name
+	Name *string `json:"name,omitempty"`
+	// ExpireDate Optional. Point in time (Unix timestamp) when the link will expire or has been expired
+	ExpireDate *int `json:"expire_date,omitempty"`
+	// MemberLimit Optional. The maximum number of users that can be members of the chat simultaneously after
+	// joining the chat via this invite link; 1-99999
+	MemberLimit *int `json:"member_limit,omitempty"`
+	// PendingJoinRequestCount Optional. Number of pending join requests created using this link
+	PendingJoinRequestCount *int `json:"pending_join_request_count,omitempty"`
+	// SubscriptionPeriod Optional. The number of seconds the subscription will be active for before the next
+	// payment
+	SubscriptionPeriod *int `json:"subscription_period,omitempty"`
+	// SubscriptionPrice Optional. The amount of Telegram Stars a user must pay initially and after each
+	// subsequent subscription period to be a member of the chat using the link
+	SubscriptionPrice *int `json:"subscription_price,omitempty"`
 }
 
 // ChatMemberStatusType indicates the status of a chat member.
@@ -173,92 +316,154 @@ const (
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#chatmember
 type ChatMember struct {
+	// Status is the member's current status in the chat.
 	Status ChatMemberStatusType `json:"status"`
-	User   User                 `json:"user"`
-	Tag    string               `json:"tag,omitempty"` // Since: Bot API 9.5
+	// User Information about the user
+	User User `json:"user"`
+	// Tag Optional. Tag of the member
+	Tag string `json:"tag,omitempty"` // Since: Bot API 9.5
 
+	// IsAnonymous True, if the user's presence in the chat is hidden
 	// Owner
-	IsAnonymous *bool   `json:"is_anonymous"`
+	IsAnonymous *bool `json:"is_anonymous"`
+	// CustomTitle Optional. Custom title for this user
 	CustomTitle *string `json:"custom_title,omitempty"`
 
+	// CanBeEdited True, if the bot is allowed to edit administrator privileges of that user
 	// Administrator
-	CanBeEdited         *bool `json:"can_be_edited,omitempty"`
-	CanManageChat       *bool `json:"can_manage_chat,omitempty"`
-	CanDeleteMessages   *bool `json:"can_delete_messages,omitempty"`
+	CanBeEdited *bool `json:"can_be_edited,omitempty"`
+	// CanManageChat True, if the administrator can access the chat event log, get boost list, see hidden
+	// supergroup and channel members, report spam messages, ignore slow mode, and send messages to the chat
+	// without paying Telegram Stars. Implied by any other administrator privilege.
+	CanManageChat *bool `json:"can_manage_chat,omitempty"`
+	// CanDeleteMessages True, if the administrator can delete messages of other users
+	CanDeleteMessages *bool `json:"can_delete_messages,omitempty"`
+	// CanManageVideoChats True, if the administrator can manage video chats
 	CanManageVideoChats *bool `json:"can_manage_video_chats,omitempty"`
-	CanRestrictMembers  *bool `json:"can_restrict_members,omitempty"`
-	CanPromoteMembers   *bool `json:"can_promote_members,omitempty"`
-	CanChangeInfo       *bool `json:"can_change_info,omitempty"`
-	CanInviteUsers      *bool `json:"can_invite_users,omitempty"`
-	CanPostStories      *bool `json:"can_post_stories,omitempty"`   // Since: Bot API 6.9
-	CanEditStories      *bool `json:"can_edit_stories,omitempty"`   // Since: Bot API 6.9
-	CanDeleteStories    *bool `json:"can_delete_stories,omitempty"` // Since: Bot API 6.9
+	// CanRestrictMembers True, if the administrator can restrict, ban or unban chat members, or access
+	// supergroup statistics
+	CanRestrictMembers *bool `json:"can_restrict_members,omitempty"`
+	// CanPromoteMembers True, if the administrator can add new administrators with a subset of their own
+	// privileges or demote administrators that they have promoted, directly or indirectly (promoted by
+	// administrators that were appointed by the user)
+	CanPromoteMembers *bool `json:"can_promote_members,omitempty"`
+	// CanChangeInfo True, if the user is allowed to change the chat title, photo and other settings
+	CanChangeInfo *bool `json:"can_change_info,omitempty"`
+	// CanInviteUsers True, if the user is allowed to invite new users to the chat
+	CanInviteUsers *bool `json:"can_invite_users,omitempty"`
+	// CanPostStories True, if the administrator can post stories to the chat
+	CanPostStories *bool `json:"can_post_stories,omitempty"` // Since: Bot API 6.9
+	// CanEditStories True, if the administrator can edit stories posted by other users, post stories to the
+	// chat page, pin chat stories, and access the chat's story archive
+	CanEditStories *bool `json:"can_edit_stories,omitempty"` // Since: Bot API 6.9
+	// CanDeleteStories True, if the administrator can delete stories posted by other users
+	CanDeleteStories *bool `json:"can_delete_stories,omitempty"` // Since: Bot API 6.9
 
-	CanPostMessages         *bool `json:"can_post_messages,omitempty"`
-	CanEditMessages         *bool `json:"can_edit_messages,omitempty"`
-	CanPinMessages          *bool `json:"can_pin_messages,omitempty"`
-	CanManageTopics         *bool `json:"can_manage_topics,omitempty"`          // Since: Bot API 6.3
+	// CanPostMessages Optional. True, if the administrator can post messages in the channel, approve suggested
+	// posts, or access channel statistics; for channels only
+	CanPostMessages *bool `json:"can_post_messages,omitempty"`
+	// CanEditMessages Optional. True, if the administrator can edit messages of other users and can pin
+	// messages; for channels only
+	CanEditMessages *bool `json:"can_edit_messages,omitempty"`
+	// CanPinMessages reports whether the member may pin messages.
+	CanPinMessages *bool `json:"can_pin_messages,omitempty"`
+	// CanManageTopics reports whether the member may manage forum topics.
+	CanManageTopics *bool `json:"can_manage_topics,omitempty"` // Since: Bot API 6.3
+	// CanManageDirectMessages Optional. True, if the administrator can manage direct messages of the channel
+	// and decline suggested posts; for channels only
 	CanManageDirectMessages *bool `json:"can_manage_direct_messages,omitempty"` // Since: Bot API 9.1
-	CanManageTags           *bool `json:"can_manage_tags,omitempty"`            // Since: Bot API 9.5
+	// CanManageTags Optional. True, if the administrator can edit the tags of regular members; for groups and
+	// supergroups only. If omitted, defaults to the value of can_pin_messages.
+	CanManageTags *bool `json:"can_manage_tags,omitempty"` // Since: Bot API 9.5
 
+	// UntilDate is the Unix time when restrictions expire; zero means forever.
 	// Member
 	UntilDate *int `json:"until_date,omitempty"`
 
+	// IsMember True, if the user is a member of the chat at the moment of the request
 	// Restricted
-	IsMember             *bool `json:"is_member,omitempty"`
-	CanSendMessages      *bool `json:"can_send_messages,omitempty"`
-	CanSendAudios        *bool `json:"can_send_audios,omitempty"`      // Since: Bot API 6.5
-	CanSendDocuments     *bool `json:"can_send_documents,omitempty"`   // Since: Bot API 6.5
-	CanSendPhotos        *bool `json:"can_send_photos,omitempty"`      // Since: Bot API 6.5
-	CanSendVideos        *bool `json:"can_send_videos,omitempty"`      // Since: Bot API 6.5
-	CanSendVideoNotes    *bool `json:"can_send_video_notes,omitempty"` // Since: Bot API 6.5
-	CanSendVoiceNotes    *bool `json:"can_send_voice_notes,omitempty"` // Since: Bot API 6.5
-	CanSendPolls         *bool `json:"can_send_polls,omitempty"`
+	IsMember *bool `json:"is_member,omitempty"`
+	// CanSendMessages True, if the user is allowed to send text messages, rich messages, contacts, giveaways,
+	// giveaway winners, invoices, locations and venues
+	CanSendMessages *bool `json:"can_send_messages,omitempty"`
+	// CanSendAudios True, if the user is allowed to send audios
+	CanSendAudios *bool `json:"can_send_audios,omitempty"` // Since: Bot API 6.5
+	// CanSendDocuments True, if the user is allowed to send documents
+	CanSendDocuments *bool `json:"can_send_documents,omitempty"` // Since: Bot API 6.5
+	// CanSendPhotos True, if the user is allowed to send photos
+	CanSendPhotos *bool `json:"can_send_photos,omitempty"` // Since: Bot API 6.5
+	// CanSendVideos True, if the user is allowed to send videos
+	CanSendVideos *bool `json:"can_send_videos,omitempty"` // Since: Bot API 6.5
+	// CanSendVideoNotes True, if the user is allowed to send video notes
+	CanSendVideoNotes *bool `json:"can_send_video_notes,omitempty"` // Since: Bot API 6.5
+	// CanSendVoiceNotes True, if the user is allowed to send voice notes
+	CanSendVoiceNotes *bool `json:"can_send_voice_notes,omitempty"` // Since: Bot API 6.5
+	// CanSendPolls True, if the user is allowed to send polls and checklists
+	CanSendPolls *bool `json:"can_send_polls,omitempty"`
+	// CanSendOtherMessages True, if the user is allowed to send animations, games, stickers and use inline bots
 	CanSendOtherMessages *bool `json:"can_send_other_messages,omitempty"`
+	// CanAddWebPagePreview True, if the user is allowed to add web page previews to their messages
 	CanAddWebPagePreview *bool `json:"can_add_web_page_previews,omitempty"`
-	CanReactToMessages   *bool `json:"can_react_to_messages,omitempty"` // Since: Bot API 10.0
-	CanEditTag           *bool `json:"can_edit_tag,omitempty"`          // Since: Bot API 9.5
+	// CanReactToMessages True, if the user is allowed to react to messages
+	CanReactToMessages *bool `json:"can_react_to_messages,omitempty"` // Since: Bot API 10.0
+	// CanEditTag True, if the user is allowed to edit their own tag
+	CanEditTag *bool `json:"can_edit_tag,omitempty"` // Since: Bot API 9.5
 }
 
 // ChatBoostSource describes the source of a chat boost.
 // Since: Bot API 7.0
 // See https://core.telegram.org/bots/api#chatboostsource
 type ChatBoostSource struct {
+	// Source identifies the source variant: premium, gift_code, or giveaway.
 	Source string `json:"source"`
-	User   User   `json:"user"`
+	// User is the user responsible for the boost when supplied by the source variant.
+	User User `json:"user"`
 
+	// GiveawayMessageID Identifier of a message in the chat with the giveaway; the message could have been
+	// deleted already. May be 0 if the message isn't sent yet.
 	// Giveaway
-	GiveawayMessageID *int  `json:"giveaway_message_id,omitempty"`
-	PrizeStarCount    *int  `json:"prize_star_count,omitempty"`
-	IsUnclaimed       *bool `json:"is_unclaimed,omitempty"`
+	GiveawayMessageID *int `json:"giveaway_message_id,omitempty"`
+	// PrizeStarCount Optional. The number of Telegram Stars to be split between giveaway winners; for Telegram
+	// Star giveaways only
+	PrizeStarCount *int `json:"prize_star_count,omitempty"`
+	// IsUnclaimed Optional. True, if the giveaway was completed, but there was no user to win the prize
+	IsUnclaimed *bool `json:"is_unclaimed,omitempty"`
 }
 
 // ChatBoost represents a boost added to a chat.
 // Since: Bot API 7.0
 // See https://core.telegram.org/bots/api#chatboost
 type ChatBoost struct {
-	BoostID        string          `json:"boost_id"`
-	AddDate        int             `json:"add_date"`
-	ExpirationDate int             `json:"expiration_date"`
-	Source         ChatBoostSource `json:"source"`
+	// BoostID Unique identifier of the boost
+	BoostID string `json:"boost_id"`
+	// AddDate Point in time (Unix timestamp) when the chat was boosted
+	AddDate int `json:"add_date"`
+	// ExpirationDate Point in time (Unix timestamp) when the boost will automatically expire, unless the
+	// booster's Telegram Premium subscription is prolonged
+	ExpirationDate int `json:"expiration_date"`
+	// Source Source of the added boost
+	Source ChatBoostSource `json:"source"`
 }
 
 // UserChatBoosts represents a list of boosts a user has given to a chat.
 // Since: Bot API 7.0
 // See https://core.telegram.org/bots/api#userchatboosts
 type UserChatBoosts struct {
+	// Boosts The list of boosts added to the chat by the user
 	Boosts []ChatBoost `json:"boosts"`
 }
 
 // ChatBoostAdded describes a service message about a user boosting a chat.
 // Since: Bot API 7.1
 type ChatBoostAdded struct {
+	// BoostCount Number of boosts added by the user
 	BoostCount int `json:"boost_count"`
 }
 
 // ChatBackground represents a chat background.
 // Since: Bot API 7.5
 type ChatBackground struct {
+	// Type Type of the background
 	Type BackgroundType `json:"type"`
 }
 
@@ -266,6 +471,8 @@ type ChatBackground struct {
 // Since: Bot API 9.4
 // See https://core.telegram.org/bots/api#chatownerleft
 type ChatOwnerLeft struct {
+	// NewOwner Optional. The user who will become the new owner of the chat if the previous owner does not
+	// return to the chat
 	NewOwner *User `json:"new_owner,omitempty"`
 }
 
@@ -273,6 +480,7 @@ type ChatOwnerLeft struct {
 // Since: Bot API 9.4
 // See https://core.telegram.org/bots/api#chatownerchanged
 type ChatOwnerChanged struct {
+	// NewOwner The new owner of the chat
 	NewOwner User `json:"new_owner"`
 }
 
@@ -280,31 +488,61 @@ type ChatOwnerChanged struct {
 // Since: Bot API 6.0
 // See https://core.telegram.org/bots/api#chatadministratorrights
 type ChatAdministratorRights struct {
-	IsAnonymous         bool `json:"is_anonymous"`
-	CanManageChat       bool `json:"can_manage_chat"`
-	CanDeleteMessages   bool `json:"can_delete_messages"`
+	// IsAnonymous True, if the user's presence in the chat is hidden
+	IsAnonymous bool `json:"is_anonymous"`
+	// CanManageChat True, if the administrator can access the chat event log, get boost list, see hidden
+	// supergroup and channel members, report spam messages, ignore slow mode, and send messages to the chat
+	// without paying Telegram Stars. Implied by any other administrator privilege.
+	CanManageChat bool `json:"can_manage_chat"`
+	// CanDeleteMessages True, if the administrator can delete messages of other users
+	CanDeleteMessages bool `json:"can_delete_messages"`
+	// CanManageVideoChats True, if the administrator can manage video chats
 	CanManageVideoChats bool `json:"can_manage_video_chats"`
-	CanRestrictMembers  bool `json:"can_restrict_members"`
-	CanPromoteMembers   bool `json:"can_promote_members"`
-	CanChangeInfo       bool `json:"can_change_info"`
-	CanInviteUsers      bool `json:"can_invite_users"`
-	CanPostStories      bool `json:"can_post_stories"`
-	CanEditStories      bool `json:"can_edit_stories"`
-	CanDeleteStories    bool `json:"can_delete_stories"`
+	// CanRestrictMembers True, if the administrator can restrict, ban or unban chat members, or access
+	// supergroup statistics
+	CanRestrictMembers bool `json:"can_restrict_members"`
+	// CanPromoteMembers True, if the administrator can add new administrators with a subset of their own
+	// privileges or demote administrators that they have promoted, directly or indirectly (promoted by
+	// administrators that were appointed by the user)
+	CanPromoteMembers bool `json:"can_promote_members"`
+	// CanChangeInfo True, if the user is allowed to change the chat title, photo and other settings
+	CanChangeInfo bool `json:"can_change_info"`
+	// CanInviteUsers True, if the user is allowed to invite new users to the chat
+	CanInviteUsers bool `json:"can_invite_users"`
+	// CanPostStories True, if the administrator can post stories to the chat
+	CanPostStories bool `json:"can_post_stories"`
+	// CanEditStories True, if the administrator can edit stories posted by other users, post stories to the
+	// chat page, pin chat stories, and access the chat's story archive
+	CanEditStories bool `json:"can_edit_stories"`
+	// CanDeleteStories True, if the administrator can delete stories posted by other users
+	CanDeleteStories bool `json:"can_delete_stories"`
 
-	CanPostMessages         *bool `json:"can_post_messages,omitempty"`
-	CanEditMessages         *bool `json:"can_edit_messages,omitempty"`
-	CanPinMessages          *bool `json:"can_pin_messages,omitempty"`
-	CanManageTopics         *bool `json:"can_manage_topics,omitempty"`
+	// CanPostMessages Optional. True, if the administrator can post messages in the channel, approve suggested
+	// posts, or access channel statistics; for channels only
+	CanPostMessages *bool `json:"can_post_messages,omitempty"`
+	// CanEditMessages Optional. True, if the administrator can edit messages of other users and can pin
+	// messages; for channels only
+	CanEditMessages *bool `json:"can_edit_messages,omitempty"`
+	// CanPinMessages Optional. True, if the user is allowed to pin messages; for groups and supergroups only
+	CanPinMessages *bool `json:"can_pin_messages,omitempty"`
+	// CanManageTopics Optional. True, if the user is allowed to create, rename, close, and reopen forum topics;
+	// for supergroups only
+	CanManageTopics *bool `json:"can_manage_topics,omitempty"`
+	// CanManageDirectMessages Optional. True, if the administrator can manage direct messages of the channel
+	// and decline suggested posts; for channels only
 	CanManageDirectMessages *bool `json:"can_manage_direct_messages,omitempty"`
-	CanManageTags           *bool `json:"can_manage_tags,omitempty"`
+	// CanManageTags Optional. True, if the administrator can edit the tags of regular members; for groups and
+	// supergroups only. If omitted, defaults to the value of can_pin_messages.
+	CanManageTags *bool `json:"can_manage_tags,omitempty"`
 }
 
 // ChatBoostUpdated represents a boost added to a chat or changed.
 // Since: Bot API 7.0
 // See https://core.telegram.org/bots/api#chatboostupdated
 type ChatBoostUpdated struct {
-	Chat  Chat      `json:"chat"`
+	// Chat Chat which was boosted
+	Chat Chat `json:"chat"`
+	// Boost Information about the chat boost
 	Boost ChatBoost `json:"boost"`
 }
 
@@ -312,8 +550,35 @@ type ChatBoostUpdated struct {
 // Since: Bot API 7.0
 // See https://core.telegram.org/bots/api#chatboostremoved
 type ChatBoostRemoved struct {
-	Chat       Chat            `json:"chat"`
-	BoostID    string          `json:"boost_id"`
-	RemoveDate int             `json:"remove_date"`
-	Source     ChatBoostSource `json:"source"`
+	// Chat Chat which was boosted
+	Chat Chat `json:"chat"`
+	// BoostID Unique identifier of the boost
+	BoostID string `json:"boost_id"`
+	// RemoveDate Point in time (Unix timestamp) when the boost was removed
+	RemoveDate int `json:"remove_date"`
+	// Source Source of the removed boost
+	Source ChatBoostSource `json:"source"`
 }
+
+// Community represents a group of chats.
+//
+// Since: Bot API 10.2
+type Community struct {
+	// ID uniquely identifies the value within its containing object.
+	ID int64 `json:"id"`
+	// Name is the user-facing or reference name of the value.
+	Name string `json:"name"`
+}
+
+// CommunityChatAdded describes a service message about a chat joining a community.
+//
+// Since: Bot API 10.2
+type CommunityChatAdded struct {
+	// Community contains information about the affected community.
+	Community Community `json:"community"`
+}
+
+// CommunityChatRemoved describes a service message about a chat leaving a community.
+//
+// Since: Bot API 10.2
+type CommunityChatRemoved struct{}

tgapi/errors.go

@@ -14,11 +14,37 @@ var ErrPoolQueueFull = errors.New("worker pool queue full")
 // ErrPoolStopped reports that a request was submitted after the worker pool stopped.
 var ErrPoolStopped = errors.New("worker pool stopped")
 
+// ErrPoolWorkerPanic reports a panic recovered while executing a worker-pool request.
+var ErrPoolWorkerPanic = errors.New("worker pool request panicked")
+
+// ErrResponseTooLarge reports a Telegram API response larger than the safety limit.
+var ErrResponseTooLarge = errors.New("telegram API response is too large")
+
+// ErrFileTooLarge reports a file download that exceeds the caller's limit.
+var ErrFileTooLarge = errors.New("telegram file exceeds size limit")
+
+// ErrRichJSONDepth reports a rich-message JSON tree deeper than the decoder limit.
+var ErrRichJSONDepth = errors.New("rich-message JSON exceeds depth limit")
+
+// ErrRichJSONNodes reports a rich-message JSON tree larger than the decoder limit.
+var ErrRichJSONNodes = errors.New("rich-message JSON exceeds node limit")
+
+// ErrRetryLimit reports that a request exhausted its configured 429 retries.
+var ErrRetryLimit = errors.New("telegram retry limit reached")
+
+// ErrRichMessageDraftUploadUnsupported reports a direct file upload attempted for a rich draft.
+//
+// Since: Bot API 10.2
+var ErrRichMessageDraftUploadUnsupported = errors.New("sendRichMessageDraft does not support direct file uploads")
+
 // ResponseError reports an unsuccessful Telegram API response.
 type ResponseError struct {
-	Code        int
+	// Code is the Telegram API error code.
+	Code int
+	// Description is the human-readable Telegram API error description.
 	Description string
-	Parameters  *ResponseParameters
+	// Parameters contains additional recovery metadata such as retry_after.
+	Parameters *ResponseParameters
 }
 
 // Error returns the Telegram API error code and description.

tgapi/forum_methods.go

@@ -5,8 +5,10 @@ import "context"
 // BaseForumTopic contains common fields for forum topic operations that require a chat ID and a message thread ID.
 // Since: Bot API 6.3
 type BaseForumTopic struct {
-	ChatID          int64 `json:"chat_id"`
-	MessageThreadID int   `json:"message_thread_id"`
+	// ChatID identifies the target supergroup.
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID identifies the target forum topic.
+	MessageThreadID int `json:"message_thread_id"`
 }
 
 // GetForumTopicIconStickers returns the list of custom emoji that can be used as a forum topic icon.
@@ -30,10 +32,18 @@ func (api *API) GetForumTopicIconStickersWithContext(ctx context.Context) ([]Sti
 // Since: Bot API 6.3
 // See https://core.telegram.org/bots/api#createforumtopic
 type CreateForumTopic struct {
-	ChatID            int64               `json:"chat_id"`
-	Name              string              `json:"name"`
-	IconColor         ForumTopicIconColor `json:"icon_color"`
-	IconCustomEmojiID string              `json:"icon_custom_emoji_id"`
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// Name Required. Topic name, 1-128 characters
+	Name string `json:"name"`
+	// IconColor Optional. Color of the topic icon in RGB format. Currently, must be one of 7322096 (0x6FB9F0),
+	// 16766590 (0xFFD67E), 13338331 (0xCB86DB), 9367192 (0x8EEE98), 16749490 (0xFF93B2), or 16478047
+	// (0xFB6F5F).
+	IconColor ForumTopicIconColor `json:"icon_color"`
+	// IconCustomEmojiID Optional. Unique identifier of the custom emoji shown as the topic icon. Use
+	// getForumTopicIconStickers to get all allowed custom emoji identifiers.
+	IconCustomEmojiID string `json:"icon_custom_emoji_id"`
 }
 
 // CreateForumTopic creates a topic in a forum supergroup.
@@ -59,7 +69,12 @@ func (api *API) CreateForumTopicWithContext(ctx context.Context, params CreateFo
 // See https://core.telegram.org/bots/api#editforumtopic
 type EditForumTopic struct {
 	BaseForumTopic
-	Name              string `json:"name"`
+	// Name Optional. New topic name, 0-128 characters. If not specified or empty, the current name of the topic
+	// will be kept.
+	Name string `json:"name"`
+	// IconCustomEmojiID Optional. New unique identifier of the custom emoji shown as the topic icon. Use
+	// getForumTopicIconStickers to get all allowed custom emoji identifiers. Pass an empty string to remove the
+	// icon. If not specified, the current icon will be kept.
 	IconCustomEmojiID string `json:"icon_custom_emoji_id"`
 }
 
@@ -156,6 +171,7 @@ func (api *API) UnpinAllForumTopicMessagesWithContext(ctx context.Context, param
 // BaseGeneralForumTopic contains common fields for general forum topic operations that require a chat ID.
 // Since: Bot API 6.4
 type BaseGeneralForumTopic struct {
+	// ChatID identifies the target supergroup.
 	ChatID int64 `json:"chat_id"`
 }
 
@@ -163,8 +179,11 @@ type BaseGeneralForumTopic struct {
 // Since: Bot API 6.4
 // See https://core.telegram.org/bots/api#editgeneralforumtopic
 type EditGeneralForumTopic struct {
-	ChatID int64  `json:"chat_id"`
-	Name   string `json:"name"`
+	// ChatID Required. Unique identifier for the target chat or username of the target supergroup in the format
+	// @username
+	ChatID int64 `json:"chat_id"`
+	// Name Required. New topic name, 1-128 characters
+	Name string `json:"name"`
 }
 
 // EditGeneralForumTopic edits the name of the 'General' topic in a forum supergroup.

tgapi/forum_types.go

@@ -4,11 +4,17 @@ package tgapi
 // Since: Bot API 6.3
 // See https://core.telegram.org/bots/api#forumtopic
 type ForumTopic struct {
-	MessageThreadID   int    `json:"message_thread_id"`
-	Name              string `json:"name"`
-	IconColor         int    `json:"icon_color"`
+	// MessageThreadID Unique identifier of the forum topic
+	MessageThreadID int `json:"message_thread_id"`
+	// Name Name of the topic
+	Name string `json:"name"`
+	// IconColor Color of the topic icon in RGB format
+	IconColor int `json:"icon_color"`
+	// IconCustomEmojiID Optional. Unique identifier of the custom emoji shown as the topic icon
 	IconCustomEmojiID string `json:"icon_custom_emoji_id,omitempty"`
-	IsNameImplicit    bool   `json:"is_name_implicit,omitempty"`
+	// IsNameImplicit Optional. True, if the name of the topic wasn't specified explicitly by its creator and
+	// likely needs to be changed by the bot
+	IsNameImplicit bool `json:"is_name_implicit,omitempty"`
 }
 
 // ForumTopicIconColor represents the color of a forum topic icon.
@@ -25,16 +31,24 @@ const (
 // ForumTopicCreated represents a service message about a new forum topic created.
 // Since: Bot API 6.3
 type ForumTopicCreated struct {
-	Name              string `json:"name"`
-	IconColor         int    `json:"icon_color"`
+	// Name Name of the topic
+	Name string `json:"name"`
+	// IconColor Color of the topic icon in RGB format
+	IconColor int `json:"icon_color"`
+	// IconCustomEmojiID Optional. Unique identifier of the custom emoji shown as the topic icon
 	IconCustomEmojiID string `json:"icon_custom_emoji_id,omitempty"`
-	IsNameImplicit    bool   `json:"is_name_implicit,omitempty"`
+	// IsNameImplicit Optional. True, if the name of the topic wasn't specified explicitly by its creator and
+	// likely needs to be changed by the bot
+	IsNameImplicit bool `json:"is_name_implicit,omitempty"`
 }
 
 // ForumTopicEdited represents a service message about an edited forum topic.
 // Since: Bot API 6.4
 type ForumTopicEdited struct {
-	Name              string `json:"name,omitempty"`
+	// Name Optional. New name of the topic, if it was edited
+	Name string `json:"name,omitempty"`
+	// IconCustomEmojiID Optional. New identifier of the custom emoji shown as the topic icon, if it was edited;
+	// an empty string if the icon was removed
 	IconCustomEmojiID string `json:"icon_custom_emoji_id,omitempty"`
 }
 

tgapi/games_methods.go

@@ -6,18 +6,37 @@ import "context"
 // Since: Bot API 2.2
 // See https://core.telegram.org/bots/api#sendgame
 type SendGame struct {
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
 	BusinessConnectionID string `json:"business_connection_id,omitempty"`
-	ChatID               int64  `json:"chat_id"`
-	MessageThreadID      int    `json:"message_thread_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot in the format
+	// @username. Games can't be sent to channel direct messages chats and channel chats.
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
 
+	// GameShortName Required. Short name of the game, serves as the unique identifier for the game. Set up your
+	// games via @BotFather.
 	GameShortName string `json:"game_short_name"`
 
-	DisableNotification bool                  `json:"disable_notification,omitempty"`
-	ProtectContent      bool                  `json:"protect_content,omitempty"`
-	AllowPaidBroadcast  bool                  `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID     string                `json:"message_effect_id,omitempty"`
-	ReplyParameters     *ReplyParameters      `json:"reply_parameters,omitempty"`
-	ReplyMarkup         *InlineKeyboardMarkup `json:"reply_markup,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. A JSON-serialized object for an inline keyboard. If empty, one 'Play game_title'
+	// button will be shown. If not empty, the first button must launch the game.
+	ReplyMarkup *InlineKeyboardMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendGame sends a game message.
@@ -41,13 +60,23 @@ func (api *API) SendGameWithContext(ctx context.Context, params SendGame) (Messa
 // Since: Bot API 2.2
 // See https://core.telegram.org/bots/api#setgamescore
 type SetGameScore struct {
-	UserID             int64  `json:"user_id"`
-	Score              int    `json:"score"`
-	Force              bool   `json:"force,omitempty"`
-	DisableEditMessage bool   `json:"disable_edit_message,omitempty"`
-	ChatID             int64  `json:"chat_id,omitempty"`
-	MessageID          int    `json:"message_id,omitempty"`
-	InlineMessageID    string `json:"inline_message_id,omitempty"`
+	// UserID Required. User identifier
+	UserID int64 `json:"user_id"`
+	// Score Required. New score, must be non-negative
+	Score int `json:"score"`
+	// Force Optional. Pass True if the high score is allowed to decrease. This can be useful when fixing
+	// mistakes or banning cheaters.
+	Force bool `json:"force,omitempty"`
+	// DisableEditMessage Optional. Pass True if the game message should not be automatically edited to include
+	// the current scoreboard
+	DisableEditMessage bool `json:"disable_edit_message,omitempty"`
+	// ChatID Optional. Required if inline_message_id is not specified. Unique identifier for the target chat.
+	ChatID int64 `json:"chat_id,omitempty"`
+	// MessageID Optional. Required if inline_message_id is not specified. Identifier of the sent message.
+	MessageID int `json:"message_id,omitempty"`
+	// InlineMessageID Optional. Required if chat_id and message_id are not specified. Identifier of the inline
+	// message.
+	InlineMessageID string `json:"inline_message_id,omitempty"`
 }
 
 // SetGameScore sets a user's score in a game message.
@@ -87,9 +116,14 @@ func (api *API) SetGameScoreWithContext(ctx context.Context, params SetGameScore
 // Since: Bot API 2.2
 // See https://core.telegram.org/bots/api#getgamehighscores
 type GetGameHighScores struct {
-	UserID          int64  `json:"user_id"`
-	ChatID          int64  `json:"chat_id,omitempty"`
-	MessageID       int    `json:"message_id,omitempty"`
+	// UserID Required. Target user id
+	UserID int64 `json:"user_id"`
+	// ChatID Optional. Required if inline_message_id is not specified. Unique identifier for the target chat.
+	ChatID int64 `json:"chat_id,omitempty"`
+	// MessageID Optional. Required if inline_message_id is not specified. Identifier of the sent message.
+	MessageID int `json:"message_id,omitempty"`
+	// InlineMessageID Optional. Required if chat_id and message_id are not specified. Identifier of the inline
+	// message.
 	InlineMessageID string `json:"inline_message_id,omitempty"`
 }
 

tgapi/games_types.go

@@ -3,12 +3,20 @@ package tgapi
 // Game represents a game.
 // Since: Bot API 2.2
 type Game struct {
-	Title        string          `json:"title"`
-	Description  string          `json:"description"`
-	Photo        []PhotoSize     `json:"photo"`
-	Text         string          `json:"text,omitempty"`
+	// Title Title of the game
+	Title string `json:"title"`
+	// Description Description of the game
+	Description string `json:"description"`
+	// Photo Photo that will be displayed in the game message in chats
+	Photo []PhotoSize `json:"photo"`
+	// Text Optional. Brief description of the game or high scores included in the game message. Can be
+	// automatically edited to include current high scores for the game when the bot calls setGameScore, or
+	// manually edited using editMessageText. 0-4096 characters.
+	Text string `json:"text,omitempty"`
+	// TextEntities Optional. Special entities that appear in text, such as usernames, URLs, bot commands, etc.
 	TextEntities []MessageEntity `json:"text_entities,omitempty"`
-	Animation    *Animation      `json:"animation,omitempty"`
+	// Animation Optional. Animation that will be displayed in the game message in chats. Upload via BotFather.
+	Animation *Animation `json:"animation,omitempty"`
 }
 
 // CallbackGame is a placeholder for the future use of callback games.
@@ -19,7 +27,10 @@ type CallbackGame struct{}
 // Since: Bot API 2.2
 // See https://core.telegram.org/bots/api#gamehighscore
 type GameHighScore struct {
-	Position int  `json:"position"`
-	User     User `json:"user"`
-	Score    int  `json:"score"`
+	// Position Position in high score table for the game
+	Position int `json:"position"`
+	// User User
+	User User `json:"user"`
+	// Score Score
+	Score int `json:"score"`
 }

tgapi/inline_methods.go

@@ -6,12 +6,22 @@ import "context"
 // Since: Bot API 1.7
 // See https://core.telegram.org/bots/api#answerinlinequery
 type AnswerInlineQuery struct {
-	InlineQueryID string                    `json:"inline_query_id"`
-	Results       []InlineQueryResult       `json:"results"`
-	CacheTime     int                       `json:"cache_time,omitempty"`
-	IsPersonal    bool                      `json:"is_personal,omitempty"`
-	NextOffset    string                    `json:"next_offset,omitempty"`
-	Button        *InlineQueryResultsButton `json:"button,omitempty"`
+	// InlineQueryID Required. Unique identifier for the answered query
+	InlineQueryID string `json:"inline_query_id"`
+	// Results Required. A JSON-serialized Array of results for the inline query
+	Results []InlineQueryResult `json:"results"`
+	// CacheTime Optional. The maximum amount of time in seconds that the result of the inline query may be
+	// cached on the server. Defaults to 300.
+	CacheTime int `json:"cache_time,omitempty"`
+	// IsPersonal Optional. Pass True if results may be cached on the server side only for the user that sent
+	// the query. By default, results may be returned to any user who sends the same query.
+	IsPersonal bool `json:"is_personal,omitempty"`
+	// NextOffset Optional. Pass the offset that a client should send in the next query with the same text to
+	// receive more results. Pass an empty string if there are no more results or if you don't support
+	// pagination. Offset length can't exceed 64 bytes.
+	NextOffset string `json:"next_offset,omitempty"`
+	// Button Optional. A JSON-serialized object describing a button to be shown above inline query results
+	Button *InlineQueryResultsButton `json:"button,omitempty"`
 }
 
 // AnswerInlineQuery sends answers to an inline query.
@@ -36,8 +46,10 @@ func (api *API) AnswerInlineQueryWithContext(ctx context.Context, params AnswerI
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#answerwebappquery
 type AnswerWebAppQuery struct {
-	WebAppQueryID string            `json:"web_app_query_id"`
-	Result        InlineQueryResult `json:"result"`
+	// WebAppQueryID Required. Unique identifier for the query to be answered
+	WebAppQueryID string `json:"web_app_query_id"`
+	// Result Required. A JSON-serialized object describing the message to be sent
+	Result InlineQueryResult `json:"result"`
 }
 
 // AnswerWebAppQuery sets the result of a Web App interaction.
@@ -61,12 +73,18 @@ func (api *API) AnswerWebAppQueryWithContext(ctx context.Context, params AnswerW
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#savepreparedinlinemessage
 type SavePreparedInlineMessage struct {
-	UserID            int64             `json:"user_id"`
-	Result            InlineQueryResult `json:"result"`
-	AllowUserChats    bool              `json:"allow_user_chats,omitempty"`
-	AllowBotChats     bool              `json:"allow_bot_chats,omitempty"`
-	AllowGroupChats   bool              `json:"allow_group_chats,omitempty"`
-	AllowChannelChats bool              `json:"allow_channel_chats,omitempty"`
+	// UserID Required. Unique identifier of the target user that can use the prepared message
+	UserID int64 `json:"user_id"`
+	// Result Required. A JSON-serialized object describing the message to be sent
+	Result InlineQueryResult `json:"result"`
+	// AllowUserChats Optional. Pass True if the message can be sent to private chats with users
+	AllowUserChats bool `json:"allow_user_chats,omitempty"`
+	// AllowBotChats Optional. Pass True if the message can be sent to private chats with bots
+	AllowBotChats bool `json:"allow_bot_chats,omitempty"`
+	// AllowGroupChats Optional. Pass True if the message can be sent to group and supergroup chats
+	AllowGroupChats bool `json:"allow_group_chats,omitempty"`
+	// AllowChannelChats Optional. Pass True if the message can be sent to channel chats
+	AllowChannelChats bool `json:"allow_channel_chats,omitempty"`
 }
 
 // SavePreparedInlineMessage stores a prepared message for Mini App users.
@@ -90,7 +108,10 @@ func (api *API) SavePreparedInlineMessageWithContext(ctx context.Context, params
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#savepreparedkeyboardbutton
 type SavePreparedKeyboardButton struct {
-	UserID int64          `json:"user_id"`
+	// UserID Required. Unique identifier of the target user that can use the button
+	UserID int64 `json:"user_id"`
+	// Button Required. A JSON-serialized object describing the button to be saved. The button must be of the
+	// type request_users, request_chat, or request_managed_bot.
 	Button KeyboardButton `json:"button"`
 }
 

tgapi/inline_types.go

@@ -9,15 +9,39 @@ type InlineQueryResult map[string]any
 // Since: Bot API 6.3
 // See https://core.telegram.org/bots/api#inlinequeryresultsbutton
 type InlineQueryResultsButton struct {
-	Text           string      `json:"text"`
-	WebApp         *WebAppInfo `json:"web_app,omitempty"`
-	StartParameter string      `json:"start_parameter,omitempty"`
+	// Text Label text on the button
+	Text string `json:"text"`
+	// WebApp Optional. Description of the Web App that will be launched when the user presses the button. The
+	// Web App will be able to switch back to the inline mode using the method switchInlineQuery inside the Web
+	// App.
+	WebApp *WebAppInfo `json:"web_app,omitempty"`
+	// StartParameter Optional. Deep-linking parameter for the /start message sent to the bot when a user
+	// presses the button. 1-64 characters, only A-Z, a-z, 0-9, _ and - are allowed. Example: An inline bot that
+	// sends YouTube videos can ask the user to connect the bot to their YouTube account to adapt search results
+	// accordingly. To do this, it displays a 'Connect your YouTube account' button above the results, or even
+	// before showing any. The user presses the button, switches to a private chat with the bot and, in doing
+	// so, passes a start parameter that instructs the bot to return an OAuth link. Once done, the bot can offer
+	// a switch_inline button so that the user can easily return to the chat where they wanted to use the bot's
+	// inline capabilities.
+	StartParameter string `json:"start_parameter,omitempty"`
+}
+
+// InputRichMessageContent represents the content of a rich message to be
+// sent as the result of an inline query. Use it as the input_message_content
+// value of an InlineQueryResult.
+// Since: Bot API 10.1
+// See https://core.telegram.org/bots/api#inputrichmessagecontent
+type InputRichMessageContent struct {
+	// RichMessage contains structured rich-message content.
+	RichMessage InputRichMessage `json:"rich_message"`
 }
 
 // SentWebAppMessage describes an inline message sent by a Web App on behalf of a user.
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#sentwebappmessage
 type SentWebAppMessage struct {
+	// InlineMessageID Optional. Identifier of the sent inline message. Available only if there is an inline
+	// keyboard attached to the message.
 	InlineMessageID string `json:"inline_message_id,omitempty"`
 }
 
@@ -25,13 +49,17 @@ type SentWebAppMessage struct {
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#preparedinlinemessage
 type PreparedInlineMessage struct {
-	ID             string `json:"id"`
-	ExpirationDate int    `json:"expiration_date"`
+	// ID Unique identifier of the prepared message
+	ID string `json:"id"`
+	// ExpirationDate Expiration date of the prepared message, in Unix time. Expired prepared messages can no
+	// longer be used.
+	ExpirationDate int `json:"expiration_date"`
 }
 
 // PreparedKeyboardButton describes a prepared keyboard button.
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#preparedkeyboardbutton
 type PreparedKeyboardButton struct {
+	// ID Unique identifier of the keyboard button
 	ID string `json:"id"`
 }

tgapi/log_redaction.go

@@ -0,0 +1,86 @@
+package tgapi
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/url"
+	"strings"
+)
+
+const redactedLogValue = "<REDACTED>"
+
+var sensitiveLogFields = map[string]struct{}{
+	"callback_data":    {},
+	"credentials":      {},
+	"data":             {},
+	"invoice_payload":  {},
+	"payload":          {},
+	"provider_data":    {},
+	"provider_token":   {},
+	"secret":           {},
+	"secret_token":     {},
+	"token":            {},
+	"web_app_query_id": {},
+}
+
+func redactRequestLog(data []byte) string {
+	var value any
+	if err := json.Unmarshal(data, &value); err != nil {
+		return fmt.Sprintf("<invalid JSON omitted: %d bytes>", len(data))
+	}
+	redactLogValue(value)
+	redacted, err := json.Marshal(value)
+	if err != nil {
+		return fmt.Sprintf("<unavailable JSON omitted: %d bytes>", len(data))
+	}
+	return string(redacted)
+}
+
+func redactLogValue(value any) {
+	switch value := value.(type) {
+	case map[string]any:
+		for key, item := range value {
+			if _, sensitive := sensitiveLogFields[strings.ToLower(key)]; sensitive {
+				value[key] = redactedLogValue
+				continue
+			}
+			redactLogValue(item)
+		}
+	case []any:
+		for _, item := range value {
+			redactLogValue(item)
+		}
+	}
+}
+
+func responseLogSummary(method string, size int) string {
+	return fmt.Sprintf("method=%s bytes=%d body=omitted", method, size)
+}
+
+type redactedError struct {
+	err    error
+	secret string
+}
+
+func (e *redactedError) Error() string {
+	return strings.ReplaceAll(e.err.Error(), e.secret, redactedLogValue)
+}
+
+func (e *redactedError) Unwrap() error { return e.err }
+
+func redactHTTPError(err error, token string) error {
+	if err == nil || token == "" || !strings.Contains(err.Error(), token) {
+		return err
+	}
+
+	var urlErr *url.Error
+	if !errors.As(err, &urlErr) {
+		return &redactedError{err: err, secret: token}
+	}
+
+	redactedURL := *urlErr
+	redactedURL.URL = strings.ReplaceAll(redactedURL.URL, token, redactedLogValue)
+	redactedURL.Err = &redactedError{err: urlErr.Err, secret: token}
+	return &redactedURL
+}

tgapi/log_redaction_test.go

@@ -0,0 +1,68 @@
+package tgapi
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"strings"
+	"testing"
+)
+
+func TestRedactRequestLogRemovesSensitiveValues(t *testing.T) {
+	const input = `{"secret_token":"webhook-secret","provider_token":"payment-token","nested":{"data":"passport-data","callback_data":"callback-secret"},"chat_id":42}`
+	got := redactRequestLog([]byte(input))
+
+	for _, secret := range []string{"webhook-secret", "payment-token", "passport-data", "callback-secret"} {
+		if strings.Contains(got, secret) {
+			t.Errorf("redacted request contains %q: %s", secret, got)
+		}
+	}
+	if !strings.Contains(got, `"chat_id":42`) {
+		t.Errorf("redacted request lost non-sensitive field: %s", got)
+	}
+}
+
+func TestRedactRequestLogOmitsInvalidJSON(t *testing.T) {
+	const secret = "not-json-secret"
+	got := redactRequestLog([]byte(secret))
+	if strings.Contains(got, secret) {
+		t.Fatalf("invalid JSON was logged verbatim: %s", got)
+	}
+}
+
+func TestResponseLogSummaryNeverContainsBody(t *testing.T) {
+	const token = "managed-bot-token"
+	got := responseLogSummary("getManagedBotToken", len(token))
+	if strings.Contains(got, token) {
+		t.Fatalf("response summary contains response body: %s", got)
+	}
+	if !strings.Contains(got, "body=omitted") {
+		t.Fatalf("response summary does not explain omission: %s", got)
+	}
+}
+
+func TestRedactHTTPErrorRemovesTokenAndPreservesCause(t *testing.T) {
+	const token = "123456:secret-token"
+	cause := errors.New("transport failed")
+	original := &url.Error{
+		Op:  "Post",
+		URL: "https://api.telegram.org/bot" + token + "/sendMessage",
+		Err: fmt.Errorf("request for %s failed: %w", token, cause),
+	}
+
+	got := redactHTTPError(original, token)
+	if strings.Contains(got.Error(), token) {
+		t.Fatalf("redacted HTTP error contains bot token: %v", got)
+	}
+	if !errors.Is(got, cause) {
+		t.Fatalf("redacted HTTP error lost its cause: %v", got)
+	}
+
+	var gotURLError *url.Error
+	if !errors.As(got, &gotURLError) {
+		t.Fatalf("redacted HTTP error lost url.Error type: %T", got)
+	}
+	if strings.Contains(gotURLError.Error(), token) {
+		t.Fatalf("redacted url.Error contains bot token: %v", gotURLError)
+	}
+}

tgapi/methods.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"math"
 	"net/http"
 
 	"git.scuroneko.dev/scuroneko/laniakea/utils"
@@ -12,9 +13,24 @@ import (
 // UpdateParams holds parameters for the getUpdates method.
 // See https://core.telegram.org/bots/api#getupdates
 type UpdateParams struct {
-	Offset         *int         `json:"offset,omitempty"`
-	Limit          *int         `json:"limit,omitempty"`
-	Timeout        *int         `json:"timeout,omitempty"`
+	// Offset Optional. Identifier of the first update to be returned. Must be greater by one than the highest
+	// among the identifiers of previously received updates. By default, updates starting with the earliest
+	// unconfirmed update are returned. An update is considered confirmed as soon as getUpdates is called with
+	// an offset higher than its update_id. The negative offset can be specified to retrieve updates starting
+	// from -offset update from the end of the updates queue. All previous updates will be forgotten.
+	Offset *int `json:"offset,omitempty"`
+	// Limit Optional. Limits the number of updates to be retrieved. Values between 1-100 are accepted. Defaults
+	// to 100.
+	Limit *int `json:"limit,omitempty"`
+	// Timeout Optional. Timeout in seconds for long polling. Defaults to 0, i.e. usual short polling. Should be
+	// positive, short polling should be used for testing purposes only.
+	Timeout *int `json:"timeout,omitempty"`
+	// AllowedUpdates Optional. A JSON-serialized list of the update types you want your bot to receive. For
+	// example, specify ["message", "edited_channel_post", "callback_query"] to only receive updates of these
+	// types. See Update for a complete list of available update types. Specify an empty list to receive all
+	// update types except chat_member, message_reaction, and message_reaction_count (default). If not
+	// specified, the previous setting will be used. Please note that this parameter doesn't affect updates
+	// created before the call to getUpdates, so unwanted updates may be received for a short period of time.
 	AllowedUpdates []UpdateType `json:"allowed_updates,omitempty"`
 }
 
@@ -36,6 +52,7 @@ func (api *API) GetMeWithContext(ctx context.Context) (User, error) {
 // GetManagedBotToken holds parameters for the getManagedBotToken method.
 // See https://core.telegram.org/bots/api#getmanagedbottoken
 type GetManagedBotToken struct {
+	// UserID Required. User identifier of the managed bot whose token will be returned
 	UserID int64 `json:"user_id"`
 }
 
@@ -57,6 +74,7 @@ func (api *API) GetManagedBotTokenWithContext(ctx context.Context, params GetMan
 // ReplaceManagedBotToken holds parameters for the replaceManagedBotToken method.
 // See https://core.telegram.org/bots/api#replacemanagedbottoken
 type ReplaceManagedBotToken struct {
+	// UserID Required. User identifier of the managed bot whose token will be replaced
 	UserID int64 `json:"user_id"`
 }
 
@@ -79,7 +97,7 @@ func (api *API) ReplaceManagedBotTokenWithContext(ctx context.Context, params Re
 // Returns true on success.
 // See https://core.telegram.org/bots/api#logout
 func (api *API) LogOut() (bool, error) {
-	req := NewRequest[bool, EmptyParams]("logOut", NoParams)
+	req := NewRequest[bool]("logOut", NoParams)
 	return req.Do(api)
 }
 
@@ -87,7 +105,7 @@ func (api *API) LogOut() (bool, error) {
 // It executes the same request but uses ctx for cancellation and deadlines.
 // See https://core.telegram.org/bots/api#logout
 func (api *API) LogOutWithContext(ctx context.Context) (bool, error) {
-	req := NewRequest[bool, EmptyParams]("logOut", NoParams)
+	req := NewRequest[bool]("logOut", NoParams)
 	return req.DoWithContext(ctx, api)
 }
 
@@ -95,7 +113,7 @@ func (api *API) LogOutWithContext(ctx context.Context) (bool, error) {
 // Returns true on success.
 // See https://core.telegram.org/bots/api#close
 func (api *API) CloseRemote() (bool, error) {
-	req := NewRequest[bool, EmptyParams]("close", NoParams)
+	req := NewRequest[bool]("close", NoParams)
 	return req.Do(api)
 }
 
@@ -103,7 +121,7 @@ func (api *API) CloseRemote() (bool, error) {
 // It executes the same request but uses ctx for cancellation and deadlines.
 // See https://core.telegram.org/bots/api#close
 func (api *API) CloseRemoteWithContext(ctx context.Context) (bool, error) {
-	req := NewRequest[bool, EmptyParams]("close", NoParams)
+	req := NewRequest[bool]("close", NoParams)
 	return req.DoWithContext(ctx, api)
 }
 
@@ -126,12 +144,29 @@ func (api *API) GetUpdatesWithContext(ctx context.Context, params UpdateParams)
 // To upload a self-signed certificate, use Uploader.SetWebhook.
 // See https://core.telegram.org/bots/api#setwebhook
 type SetWebhook struct {
-	URL                string       `json:"url"`
-	IPAddress          string       `json:"ip_address,omitempty"`
-	MaxConnections     int8         `json:"max_connections,omitempty"`
-	AllowedUpdates     []UpdateType `json:"allowed_updates,omitempty"`
-	DropPendingUpdates bool         `json:"drop_pending_updates,omitempty"`
-	SecretToken        string       `json:"secret_token,omitempty"`
+	// URL Required. HTTPS URL to send updates to. Use an empty string to remove webhook integration.
+	URL string `json:"url"`
+	// IPAddress Optional. The fixed IP address which will be used to send webhook requests instead of the IP
+	// address resolved through DNS
+	IPAddress string `json:"ip_address,omitempty"`
+	// MaxConnections Optional. The maximum allowed number of simultaneous HTTPS connections to the webhook for
+	// update delivery, 1-100. Defaults to 40. Use lower values to limit the load on your bot's server, and
+	// higher values to increase your bot's throughput.
+	MaxConnections int8 `json:"max_connections,omitempty"`
+	// AllowedUpdates Optional. A JSON-serialized list of the update types you want your bot to receive. For
+	// example, specify ["message", "edited_channel_post", "callback_query"] to only receive updates of these
+	// types. See Update for a complete list of available update types. Specify an empty list to receive all
+	// update types except chat_member, message_reaction, and message_reaction_count (default). If not
+	// specified, the previous setting will be used. Please note that this parameter doesn't affect updates
+	// created before the call to the setWebhook, so unwanted updates may be received for a short period of
+	// time.
+	AllowedUpdates []UpdateType `json:"allowed_updates,omitempty"`
+	// DropPendingUpdates Optional. Pass True to drop all pending updates
+	DropPendingUpdates bool `json:"drop_pending_updates,omitempty"`
+	// SecretToken Optional. A secret token to be sent in a header “X-Telegram-Bot-Api-Secret-Token” in
+	// every webhook request, 1-256 characters. Only characters A-Z, a-z, 0-9, _ and - are allowed. The header
+	// is useful to ensure that the request comes from a webhook set by you.
+	SecretToken string `json:"secret_token,omitempty"`
 }
 
 // SetWebhook sets a webhook URL for incoming updates.
@@ -155,6 +190,7 @@ func (api *API) SetWebhookWithContext(ctx context.Context, params SetWebhook) (b
 // DeleteWebhook holds parameters for the deleteWebhook method.
 // See https://core.telegram.org/bots/api#deletewebhook
 type DeleteWebhook struct {
+	// DropPendingUpdates Optional. Pass True to drop all pending updates
 	DropPendingUpdates bool `json:"drop_pending_updates,omitempty"`
 }
 
@@ -192,6 +228,7 @@ func (api *API) GetWebhookInfoWithContext(ctx context.Context) (WebhookInfo, err
 // GetFile holds parameters for the getFile method.
 // See https://core.telegram.org/bots/api#getfile
 type GetFile struct {
+	// FileID Required. File identifier to get information about
 	FileID string `json:"file_id"`
 }
 
@@ -213,6 +250,8 @@ func (api *API) GetFileWithContext(ctx context.Context, params GetFile) (File, e
 // GetFileByLink downloads a file from Telegram's file server using the provided file link.
 // The link is usually obtained from File.FilePath.
 // For large files, prefer OpenFileByLink or OpenFileByLinkWithContext to stream the response body.
+// This unbounded helper is retained for v1 compatibility and is subject to change in v2;
+// prefer GetFileByLinkLimit for untrusted or potentially large files.
 // See https://core.telegram.org/bots/api#file
 func (api *API) GetFileByLink(link string) ([]byte, error) {
 	return api.getFileByLink(context.Background(), link)
@@ -226,6 +265,37 @@ func (api *API) GetFileByLinkWithContext(ctx context.Context, link string) ([]by
 	return api.getFileByLink(ctx, link)
 }
 
+// GetFileByLinkLimit downloads at most maxBytes from Telegram's file server.
+// It returns ErrFileTooLarge when the response exceeds the limit.
+func (api *API) GetFileByLinkLimit(link string, maxBytes int64) ([]byte, error) {
+	return api.GetFileByLinkLimitWithContext(context.Background(), link, maxBytes)
+}
+
+// GetFileByLinkLimitWithContext is the context-aware variant of GetFileByLinkLimit.
+func (api *API) GetFileByLinkLimitWithContext(ctx context.Context, link string, maxBytes int64) ([]byte, error) {
+	if maxBytes < 0 {
+		return nil, fmt.Errorf("maximum file size must not be negative: %d", maxBytes)
+	}
+	body, err := api.openFileByLink(ctx, link)
+	if err != nil {
+		return nil, err
+	}
+	defer func() { _ = body.Close() }()
+
+	readLimit := maxBytes
+	if readLimit < math.MaxInt64 {
+		readLimit++
+	}
+	data, err := io.ReadAll(io.LimitReader(body, readLimit))
+	if err != nil {
+		return nil, err
+	}
+	if int64(len(data)) > maxBytes {
+		return nil, ErrFileTooLarge
+	}
+	return data, nil
+}
+
 // OpenFileByLink opens a streaming response body for a file hosted on Telegram's file server.
 // The caller must close the returned ReadCloser.
 // See https://core.telegram.org/bots/api#file
@@ -266,7 +336,7 @@ func (api *API) openFileByLink(ctx context.Context, link string) (io.ReadCloser,
 
 	res, err := api.client.Do(req)
 	if err != nil {
-		return nil, err
+		return nil, redactHTTPError(err, api.token)
 	}
 	if res.StatusCode < http.StatusOK || res.StatusCode >= http.StatusMultipleChoices {
 		defer func() {

tgapi/methods_test.go

@@ -2,6 +2,7 @@ package tgapi
 
 import (
 	"encoding/json"
+	"errors"
 	"io"
 	"net/http"
 	"strings"
@@ -109,6 +110,25 @@ func TestGetFileByLinkReturnsHTTPStatusError(t *testing.T) {
 	}
 }
 
+func TestGetFileByLinkLimitRejectsOversizedResponse(t *testing.T) {
+	api := NewAPI(
+		NewAPIOpts("token").
+			SetAPIURL("https://example.test").
+			SetHTTPClient(&http.Client{Transport: roundTripFunc(func(_ *http.Request) (*http.Response, error) {
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       io.NopCloser(strings.NewReader("12345")),
+				}, nil
+			})}),
+	)
+	defer func() { _ = api.Close() }()
+
+	_, err := api.GetFileByLinkLimit("files/report.txt", 4)
+	if !errors.Is(err, ErrFileTooLarge) {
+		t.Fatalf("expected ErrFileTooLarge, got %v", err)
+	}
+}
+
 func TestGetUpdatesOmitsAllowedUpdatesWhenEmpty(t *testing.T) {
 	var gotBody map[string]any
 

tgapi/passport_methods.go

@@ -6,7 +6,9 @@ import "context"
 // Since: Bot API 4.0
 // See https://core.telegram.org/bots/api#setpassportdataerrors
 type SetPassportDataErrors struct {
-	UserID int64                  `json:"user_id"`
+	// UserID Required. User identifier
+	UserID int64 `json:"user_id"`
+	// Errors Required. A JSON-serialized Array describing the errors
 	Errors []PassportElementError `json:"errors"`
 }
 

tgapi/passport_types.go

@@ -3,58 +3,113 @@ package tgapi
 // PassportData contains information about Telegram Passport data shared with the bot.
 // Since: Bot API 4.0
 type PassportData struct {
-	Data        []EncryptedPassportElement `json:"data"`
-	Credentials EncryptedCredentials       `json:"credentials"`
+	// Data Array with information about documents and other Telegram Passport elements that was shared with the
+	// bot
+	Data []EncryptedPassportElement `json:"data"`
+	// Credentials Encrypted credentials required to decrypt the data
+	Credentials EncryptedCredentials `json:"credentials"`
 }
 
 // PassportFile represents a file uploaded to Telegram Passport.
 // Since: Bot API 4.0
 type PassportFile struct {
-	FileID       string `json:"file_id"`
+	// FileID Identifier for this file, which can be used to download or reuse the file
+	FileID string `json:"file_id"`
+	// FileUniqueID Unique identifier for this file, which is supposed to be the same over time and for
+	// different bots. Can't be used to download or reuse the file.
 	FileUniqueID string `json:"file_unique_id"`
-	FileSize     int64  `json:"file_size"`
-	FileDate     int64  `json:"file_date"`
+	// FileSize File size in bytes
+	FileSize int64 `json:"file_size"`
+	// FileDate Unix time when the file was uploaded
+	FileDate int64 `json:"file_date"`
 }
 
 // PassportElementType represents the type of a Telegram Passport element.
 type PassportElementType string
 
 const (
-	PassportPersonalDetailsType       PassportElementType = "personal_details"
-	PassportPassportType              PassportElementType = "passport"
-	PassportDriverLicenseType         PassportElementType = "driver_license"
-	PassportIdentityCardType          PassportElementType = "identity_card"
-	PassportInternalPassportType      PassportElementType = "internal_passport"
-	PassportAddressType               PassportElementType = "address"
-	PassportUtilityBillType           PassportElementType = "utility_bill"
-	PassportBankStatementType         PassportElementType = "bank_statement"
-	PassportRentalAgreementType       PassportElementType = "rental_agreement"
-	PassportPassportRegistrationType  PassportElementType = "passport_registration"
+	// PassportPersonalDetailsType identifies personal details.
+	PassportPersonalDetailsType PassportElementType = "personal_details"
+	// PassportPassportType identifies an international passport.
+	PassportPassportType PassportElementType = "passport"
+	// PassportDriverLicenseType identifies a driver license.
+	PassportDriverLicenseType PassportElementType = "driver_license"
+	// PassportIdentityCardType identifies an identity card.
+	PassportIdentityCardType PassportElementType = "identity_card"
+	// PassportInternalPassportType identifies an internal passport.
+	PassportInternalPassportType PassportElementType = "internal_passport"
+	// PassportAddressType identifies a residential address.
+	PassportAddressType PassportElementType = "address"
+	// PassportUtilityBillType identifies a utility bill.
+	PassportUtilityBillType PassportElementType = "utility_bill"
+	// PassportBankStatementType identifies a bank statement.
+	PassportBankStatementType PassportElementType = "bank_statement"
+	// PassportRentalAgreementType identifies a rental agreement.
+	PassportRentalAgreementType PassportElementType = "rental_agreement"
+	// PassportPassportRegistrationType identifies a passport registration.
+	PassportPassportRegistrationType PassportElementType = "passport_registration"
+	// PassportTemporaryRegistrationType identifies a temporary registration.
 	PassportTemporaryRegistrationType PassportElementType = "temporary_registration"
-	PassportPhoneNumberType           PassportElementType = "phone_number"
-	PassportEmailType                 PassportElementType = "email"
+	// PassportPhoneNumberType identifies a phone number.
+	PassportPhoneNumberType PassportElementType = "phone_number"
+	// PassportEmailType identifies an email address.
+	PassportEmailType PassportElementType = "email"
 )
 
 // EncryptedPassportElement contains information about documents or other Telegram Passport elements.
 // Since: Bot API 4.0
 type EncryptedPassportElement struct {
-	Type        PassportElementType `json:"type"`
-	Data        string              `json:"data,omitempty"`
-	PhoneNumber string              `json:"phone_number,omitempty"`
-	Email       string              `json:"email,omitempty"`
-	Files       []PassportFile      `json:"files,omitempty"`
-	FrontSide   *PassportFile       `json:"front_side,omitempty"`
-	ReverseSide *PassportFile       `json:"reverse_side,omitempty"`
-	Selfie      *PassportFile       `json:"selfie,omitempty"`
-	Translation *PassportFile       `json:"translation,omitempty"`
-	Hash        string              `json:"hash,omitempty"`
+	// Type Element type. One of “personal_details”, “passport”, “driver_license”,
+	// “identity_card”, “internal_passport”, “address”, “utility_bill”, “bank_statement”,
+	// “rental_agreement”, “passport_registration”, “temporary_registration”, “phone_number”,
+	// “email”.
+	Type PassportElementType `json:"type"`
+	// Data Optional. Base64-encoded encrypted Telegram Passport element data provided by the user; available
+	// only for “personal_details”, “passport”, “driver_license”, “identity_card”,
+	// “internal_passport” and “address” types. Can be decrypted and verified using the accompanying
+	// EncryptedCredentials.
+	Data string `json:"data,omitempty"`
+	// PhoneNumber Optional. User's verified phone number; available only for “phone_number” type
+	PhoneNumber string `json:"phone_number,omitempty"`
+	// Email Optional. User's verified email address; available only for “email” type
+	Email string `json:"email,omitempty"`
+	// Files Optional. Array of encrypted files with documents provided by the user; available only for
+	// “utility_bill”, “bank_statement”, “rental_agreement”, “passport_registration” and
+	// “temporary_registration” types. Files can be decrypted and verified using the accompanying
+	// EncryptedCredentials.
+	Files []PassportFile `json:"files,omitempty"`
+	// FrontSide Optional. Encrypted file with the front side of the document, provided by the user; available
+	// only for “passport”, “driver_license”, “identity_card” and “internal_passport”. The file
+	// can be decrypted and verified using the accompanying EncryptedCredentials.
+	FrontSide *PassportFile `json:"front_side,omitempty"`
+	// ReverseSide Optional. Encrypted file with the reverse side of the document, provided by the user;
+	// available only for “driver_license” and “identity_card”. The file can be decrypted and verified
+	// using the accompanying EncryptedCredentials.
+	ReverseSide *PassportFile `json:"reverse_side,omitempty"`
+	// Selfie Optional. Encrypted file with the selfie of the user holding a document, provided by the user;
+	// available if requested for “passport”, “driver_license”, “identity_card” and
+	// “internal_passport”. The file can be decrypted and verified using the accompanying
+	// EncryptedCredentials.
+	Selfie *PassportFile `json:"selfie,omitempty"`
+	// Translation Optional. Array of encrypted files with translated versions of documents provided by the
+	// user; available if requested for “passport”, “driver_license”, “identity_card”,
+	// “internal_passport”, “utility_bill”, “bank_statement”, “rental_agreement”,
+	// “passport_registration” and “temporary_registration” types. Files can be decrypted and verified
+	// using the accompanying EncryptedCredentials.
+	Translation *PassportFile `json:"translation,omitempty"`
+	// Hash Base64-encoded element hash for using in PassportElementErrorUnspecified
+	Hash string `json:"hash,omitempty"`
 }
 
 // EncryptedCredentials contains data required for decrypting and authenticating EncryptedPassportElement.
 // Since: Bot API 4.0
 type EncryptedCredentials struct {
-	Data   string `json:"data"`
-	Hash   string `json:"hash"`
+	// Data Base64-encoded encrypted JSON-serialized data with unique user's payload, data hashes and secrets
+	// required for EncryptedPassportElement decryption and authentication
+	Data string `json:"data"`
+	// Hash Base64-encoded data hash for data authentication
+	Hash string `json:"hash"`
+	// Secret Base64-encoded secret, encrypted with the bot's public RSA key, required for data decryption
 	Secret string `json:"secret"`
 }
 
@@ -62,16 +117,24 @@ type EncryptedCredentials struct {
 // Since: Bot API 4.0
 // See https://core.telegram.org/bots/api#passportelementerror
 type PassportElementError struct {
-	Source string              `json:"source"`
-	Type   PassportElementType `json:"type"`
+	// Source identifies the source of the passport validation error.
+	Source string `json:"source"`
+	// Type identifies the Telegram Passport element type with the error.
+	Type PassportElementType `json:"type"`
 
+	// FieldName Name of the data field which has the error
 	FieldName string `json:"field_name,omitempty"`
-	DataHash  string `json:"data_hash,omitempty"`
+	// DataHash Base64-encoded data hash
+	DataHash string `json:"data_hash,omitempty"`
 
-	FileHash   string   `json:"file_hash,omitempty"`
+	// FileHash is the base64-encoded hash of the file that contains the error.
+	FileHash string `json:"file_hash,omitempty"`
+	// FileHashes List of base64-encoded file hashes
 	FileHashes []string `json:"file_hashes,omitempty"`
 
+	// ElementHash Base64-encoded element hash
 	ElementHash string `json:"element_hash,omitempty"`
 
+	// Message Error message
 	Message string `json:"message"`
 }

tgapi/payments_methods.go

@@ -6,40 +6,104 @@ import "context"
 // Since: Bot API 3.0
 // See https://core.telegram.org/bots/api#sendinvoice
 type SendInvoice struct {
-	ChatID                int64 `json:"chat_id"`
-	MessageThreadID       int   `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int   `json:"direct_messages_topic_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
 
-	Title         string         `json:"title"`
-	Description   string         `json:"description"`
-	Payload       string         `json:"payload"`
-	ProviderToken string         `json:"provider_token,omitempty"`
-	Currency      string         `json:"currency"`
-	Prices        []LabeledPrice `json:"prices"`
+	// Title Required. Product name, 1-32 characters
+	Title string `json:"title"`
+	// Description Required. Product description, 1-255 characters
+	Description string `json:"description"`
+	// Payload Required. Bot-defined invoice payload, 1-128 bytes. This will not be displayed to the user, use
+	// it for your internal processes.
+	Payload string `json:"payload"`
+	// ProviderToken Optional. Payment provider token, obtained via @BotFather. Pass an empty string for
+	// payments in Telegram Stars.
+	ProviderToken string `json:"provider_token,omitempty"`
+	// Currency Required. Three-letter ISO 4217 currency code, see more on currencies. Pass “XTR” for
+	// payments in Telegram Stars.
+	Currency string `json:"currency"`
+	// Prices Required. Price breakdown, a JSON-serialized list of components (e.g. product price, tax,
+	// discount, delivery cost, delivery tax, bonus, etc.). Must contain exactly one item for payments in
+	// Telegram Stars.
+	Prices []LabeledPrice `json:"prices"`
 
-	MaxTipAmount        int    `json:"max_tip_amount,omitempty"`
-	SuggestedTipAmounts []int  `json:"suggested_tip_amounts,omitempty"`
-	StartParameter      string `json:"start_parameter,omitempty"`
-	ProviderData        string `json:"provider_data,omitempty"`
-	PhotoURL            string `json:"photo_url,omitempty"`
-	PhotoSize           int    `json:"photo_size,omitempty"`
-	PhotoWidth          int    `json:"photo_width,omitempty"`
-	PhotoHeight         int    `json:"photo_height,omitempty"`
-	NeedName            bool   `json:"need_name,omitempty"`
-	NeedPhoneNumber     bool   `json:"need_phone_number,omitempty"`
-	NeedEmail           bool   `json:"need_email,omitempty"`
-	NeedShippingAddress bool   `json:"need_shipping_address,omitempty"`
-	SendPhoneToProvider bool   `json:"send_phone_number_to_provider,omitempty"`
-	SendEmailToProvider bool   `json:"send_email_to_provider,omitempty"`
-	IsFlexible          bool   `json:"is_flexible,omitempty"`
-	DisableNotification bool   `json:"disable_notification,omitempty"`
-	ProtectContent      bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast  bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID     string `json:"message_effect_id,omitempty"`
+	// MaxTipAmount Optional. The maximum accepted amount for tips in the smallest units of the currency
+	// (integer, not float/double). For example, for a maximum tip of US$ 1.45 pass max_tip_amount = 145. See
+	// the exp parameter in currencies.json, it shows the number of digits past the decimal point for each
+	// currency (2 for the majority of currencies). Defaults to 0. Not supported for payments in Telegram Stars.
+	MaxTipAmount int `json:"max_tip_amount,omitempty"`
+	// SuggestedTipAmounts Optional. A JSON-serialized Array of suggested amounts of tips in the smallest units
+	// of the currency (integer, not float/double). At most 4 suggested tip amounts can be specified. The
+	// suggested tip amounts must be positive, passed in a strictly increased order and must not exceed
+	// max_tip_amount.
+	SuggestedTipAmounts []int `json:"suggested_tip_amounts,omitempty"`
+	// StartParameter Optional. Unique deep-linking parameter. If left empty, forwarded copies of the sent
+	// message will have a Pay button, allowing multiple users to pay directly from the forwarded message, using
+	// the same invoice. If non-empty, forwarded copies of the sent message will have a URL button with a deep
+	// link to the bot (instead of a Pay button), with the value used as the start parameter.
+	StartParameter string `json:"start_parameter,omitempty"`
+	// ProviderData Optional. JSON-serialized data about the invoice, which will be shared with the payment
+	// provider. A detailed description of required fields should be provided by the payment provider.
+	ProviderData string `json:"provider_data,omitempty"`
+	// PhotoURL Optional. URL of the product photo for the invoice. Can be a photo of the goods or a marketing
+	// image for a service. People like it better when they see what they are paying for.
+	PhotoURL string `json:"photo_url,omitempty"`
+	// PhotoSize Optional. Photo size in bytes
+	PhotoSize int `json:"photo_size,omitempty"`
+	// PhotoWidth Optional. Photo width
+	PhotoWidth int `json:"photo_width,omitempty"`
+	// PhotoHeight Optional. Photo height
+	PhotoHeight int `json:"photo_height,omitempty"`
+	// NeedName Optional. Pass True if you require the user's full name to complete the order. Ignored for
+	// payments in Telegram Stars.
+	NeedName bool `json:"need_name,omitempty"`
+	// NeedPhoneNumber Optional. Pass True if you require the user's phone number to complete the order. Ignored
+	// for payments in Telegram Stars.
+	NeedPhoneNumber bool `json:"need_phone_number,omitempty"`
+	// NeedEmail Optional. Pass True if you require the user's email address to complete the order. Ignored for
+	// payments in Telegram Stars.
+	NeedEmail bool `json:"need_email,omitempty"`
+	// NeedShippingAddress Optional. Pass True if you require the user's shipping address to complete the order.
+	// Ignored for payments in Telegram Stars.
+	NeedShippingAddress bool `json:"need_shipping_address,omitempty"`
+	// SendPhoneToProvider Optional. Pass True if the user's phone number should be sent to the provider.
+	// Ignored for payments in Telegram Stars.
+	SendPhoneToProvider bool `json:"send_phone_number_to_provider,omitempty"`
+	// SendEmailToProvider Optional. Pass True if the user's email address should be sent to the provider.
+	// Ignored for payments in Telegram Stars.
+	SendEmailToProvider bool `json:"send_email_to_provider,omitempty"`
+	// IsFlexible Optional. Pass True if the final price depends on the shipping method. Ignored for payments in
+	// Telegram Stars.
+	IsFlexible bool `json:"is_flexible,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *InlineKeyboardMarkup    `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. A JSON-serialized object for an inline keyboard. If empty, one 'Pay total price'
+	// button will be shown. If not empty, the first button must be a Pay button.
+	ReplyMarkup *InlineKeyboardMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendInvoice sends an invoice.
@@ -63,30 +127,77 @@ func (api *API) SendInvoiceWithContext(ctx context.Context, params SendInvoice)
 // Since: Bot API 6.1
 // See https://core.telegram.org/bots/api#createinvoicelink
 type CreateInvoiceLink struct {
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the link
+	// will be created. For payments in Telegram Stars only.
 	BusinessConnectionID string `json:"business_connection_id,omitempty"`
 
-	Title         string         `json:"title"`
-	Description   string         `json:"description"`
-	Payload       string         `json:"payload"`
-	ProviderToken string         `json:"provider_token,omitempty"`
-	Currency      string         `json:"currency"`
-	Prices        []LabeledPrice `json:"prices"`
+	// Title Required. Product name, 1-32 characters
+	Title string `json:"title"`
+	// Description Required. Product description, 1-255 characters
+	Description string `json:"description"`
+	// Payload Required. Bot-defined invoice payload, 1-128 bytes. This will not be displayed to the user, use
+	// it for your internal processes.
+	Payload string `json:"payload"`
+	// ProviderToken Optional. Payment provider token, obtained via @BotFather. Pass an empty string for
+	// payments in Telegram Stars.
+	ProviderToken string `json:"provider_token,omitempty"`
+	// Currency Required. Three-letter ISO 4217 currency code, see more on currencies. Pass “XTR” for
+	// payments in Telegram Stars.
+	Currency string `json:"currency"`
+	// Prices Required. Price breakdown, a JSON-serialized list of components (e.g. product price, tax,
+	// discount, delivery cost, delivery tax, bonus, etc.). Must contain exactly one item for payments in
+	// Telegram Stars.
+	Prices []LabeledPrice `json:"prices"`
 
-	SubscriptionPeriod  int    `json:"subscription_period,omitempty"`
-	MaxTipAmount        int    `json:"max_tip_amount,omitempty"`
-	SuggestedTipAmounts []int  `json:"suggested_tip_amounts,omitempty"`
-	ProviderData        string `json:"provider_data,omitempty"`
-	PhotoURL            string `json:"photo_url,omitempty"`
-	PhotoSize           int    `json:"photo_size,omitempty"`
-	PhotoWidth          int    `json:"photo_width,omitempty"`
-	PhotoHeight         int    `json:"photo_height,omitempty"`
-	NeedName            bool   `json:"need_name,omitempty"`
-	NeedPhoneNumber     bool   `json:"need_phone_number,omitempty"`
-	NeedEmail           bool   `json:"need_email,omitempty"`
-	NeedShippingAddress bool   `json:"need_shipping_address,omitempty"`
-	SendPhoneToProvider bool   `json:"send_phone_number_to_provider,omitempty"`
-	SendEmailToProvider bool   `json:"send_email_to_provider,omitempty"`
-	IsFlexible          bool   `json:"is_flexible,omitempty"`
+	// SubscriptionPeriod Optional. The number of seconds the subscription will be active for before the next
+	// payment. The currency must be set to “XTR” (Telegram Stars) if the parameter is used. Currently, it
+	// must always be 2592000 (30 days) if specified. Any number of subscriptions can be active for a given bot
+	// at the same time, including multiple concurrent subscriptions from the same user. Subscription price must
+	// no exceed 10000 Telegram Stars.
+	SubscriptionPeriod int `json:"subscription_period,omitempty"`
+	// MaxTipAmount Optional. The maximum accepted amount for tips in the smallest units of the currency
+	// (integer, not float/double). For example, for a maximum tip of US$ 1.45 pass max_tip_amount = 145. See
+	// the exp parameter in currencies.json, it shows the number of digits past the decimal point for each
+	// currency (2 for the majority of currencies). Defaults to 0. Not supported for payments in Telegram Stars.
+	MaxTipAmount int `json:"max_tip_amount,omitempty"`
+	// SuggestedTipAmounts Optional. A JSON-serialized Array of suggested amounts of tips in the smallest units
+	// of the currency (integer, not float/double). At most 4 suggested tip amounts can be specified. The
+	// suggested tip amounts must be positive, passed in a strictly increased order and must not exceed
+	// max_tip_amount.
+	SuggestedTipAmounts []int `json:"suggested_tip_amounts,omitempty"`
+	// ProviderData Optional. JSON-serialized data about the invoice, which will be shared with the payment
+	// provider. A detailed description of required fields should be provided by the payment provider.
+	ProviderData string `json:"provider_data,omitempty"`
+	// PhotoURL Optional. URL of the product photo for the invoice. Can be a photo of the goods or a marketing
+	// image for a service.
+	PhotoURL string `json:"photo_url,omitempty"`
+	// PhotoSize Optional. Photo size in bytes
+	PhotoSize int `json:"photo_size,omitempty"`
+	// PhotoWidth Optional. Photo width
+	PhotoWidth int `json:"photo_width,omitempty"`
+	// PhotoHeight Optional. Photo height
+	PhotoHeight int `json:"photo_height,omitempty"`
+	// NeedName Optional. Pass True if you require the user's full name to complete the order. Ignored for
+	// payments in Telegram Stars.
+	NeedName bool `json:"need_name,omitempty"`
+	// NeedPhoneNumber Optional. Pass True if you require the user's phone number to complete the order. Ignored
+	// for payments in Telegram Stars.
+	NeedPhoneNumber bool `json:"need_phone_number,omitempty"`
+	// NeedEmail Optional. Pass True if you require the user's email address to complete the order. Ignored for
+	// payments in Telegram Stars.
+	NeedEmail bool `json:"need_email,omitempty"`
+	// NeedShippingAddress Optional. Pass True if you require the user's shipping address to complete the order.
+	// Ignored for payments in Telegram Stars.
+	NeedShippingAddress bool `json:"need_shipping_address,omitempty"`
+	// SendPhoneToProvider Optional. Pass True if the user's phone number should be sent to the provider.
+	// Ignored for payments in Telegram Stars.
+	SendPhoneToProvider bool `json:"send_phone_number_to_provider,omitempty"`
+	// SendEmailToProvider Optional. Pass True if the user's email address should be sent to the provider.
+	// Ignored for payments in Telegram Stars.
+	SendEmailToProvider bool `json:"send_email_to_provider,omitempty"`
+	// IsFlexible Optional. Pass True if the final price depends on the shipping method. Ignored for payments in
+	// Telegram Stars.
+	IsFlexible bool `json:"is_flexible,omitempty"`
 }
 
 // CreateInvoiceLink creates an invoice link.
@@ -110,10 +221,17 @@ func (api *API) CreateInvoiceLinkWithContext(ctx context.Context, params CreateI
 // Since: Bot API 3.0
 // See https://core.telegram.org/bots/api#answershippingquery
 type AnswerShippingQuery struct {
-	ShippingQueryID string           `json:"shipping_query_id"`
-	OK              bool             `json:"ok"`
+	// ShippingQueryID Required. Unique identifier for the query to be answered
+	ShippingQueryID string `json:"shipping_query_id"`
+	// OK Required. Pass True if delivery to the specified address is possible and False if there are any
+	// problems (for example, if delivery to the specified address is not possible)
+	OK bool `json:"ok"`
+	// ShippingOptions Optional. Required if ok is True. A JSON-serialized Array of available shipping options.
 	ShippingOptions []ShippingOption `json:"shipping_options,omitempty"`
-	ErrorMessage    string           `json:"error_message,omitempty"`
+	// ErrorMessage Optional. Required if ok is False. Error message in human readable form that explains why it
+	// is impossible to complete the order (e.g. “Sorry, delivery to your desired address is unavailable”).
+	// Telegram will display this message to the user.
+	ErrorMessage string `json:"error_message,omitempty"`
 }
 
 // AnswerShippingQuery answers a shipping query.
@@ -138,9 +256,16 @@ func (api *API) AnswerShippingQueryWithContext(ctx context.Context, params Answe
 // Since: Bot API 3.0
 // See https://core.telegram.org/bots/api#answerprecheckoutquery
 type AnswerPreCheckoutQuery struct {
+	// PreCheckoutQueryID Required. Unique identifier for the query to be answered
 	PreCheckoutQueryID string `json:"pre_checkout_query_id"`
-	OK                 bool   `json:"ok"`
-	ErrorMessage       string `json:"error_message,omitempty"`
+	// OK Required. Specify True if everything is alright (goods are available, etc.) and the bot is ready to
+	// proceed with the order. Use False if there are any problems.
+	OK bool `json:"ok"`
+	// ErrorMessage Optional. Required if ok is False. Error message in human readable form that explains the
+	// reason for failure to proceed with the checkout (e.g. "Sorry, somebody just bought the last of our
+	// amazing black T-shirts while you were busy filling out your payment details. Please choose a different
+	// color or garment!"). Telegram will display this message to the user.
+	ErrorMessage string `json:"error_message,omitempty"`
 }
 
 // AnswerPreCheckoutQuery answers a pre-checkout query.

tgapi/payments_types.go

@@ -4,27 +4,42 @@ package tgapi
 // Since: Bot API 3.0
 // See https://core.telegram.org/bots/api#labeledprice
 type LabeledPrice struct {
-	Label  string `json:"label"`
-	Amount int    `json:"amount"`
+	// Label Portion label
+	Label string `json:"label"`
+	// Amount Price of the product in the smallest units of the currency (integer, not float/double). For
+	// example, for a price of US$ 1.45 pass amount = 145. See the exp parameter in currencies.json, it shows
+	// the number of digits past the decimal point for each currency (2 for the majority of currencies).
+	Amount int `json:"amount"`
 }
 
 // Invoice contains basic information about an invoice.
 // Since: Bot API 3.0
 type Invoice struct {
-	Title          string `json:"title"`
-	Description    string `json:"description"`
+	// Title Product name
+	Title string `json:"title"`
+	// Description Product description
+	Description string `json:"description"`
+	// StartParameter Unique bot deep-linking parameter that can be used to generate this invoice
 	StartParameter string `json:"start_parameter"`
-	Currency       string `json:"currency"`
-	TotalAmount    int    `json:"total_amount"`
+	// Currency Three-letter ISO 4217 currency code, or “XTR” for payments in Telegram Stars
+	Currency string `json:"currency"`
+	// TotalAmount Total price in the smallest units of the currency (integer, not float/double). For example,
+	// for a price of US$ 1.45 pass amount = 145. See the exp parameter in currencies.json, it shows the number
+	// of digits past the decimal point for each currency (2 for the majority of currencies).
+	TotalAmount int `json:"total_amount"`
 }
 
 // ShippingQuery represents an incoming shipping query.
 // Since: Bot API 3.0
 // See https://core.telegram.org/bots/api#shippingquery
 type ShippingQuery struct {
-	ID              string          `json:"id"`
-	From            User            `json:"from"`
-	InvoicePayload  string          `json:"invoice_payload"`
+	// ID Unique query identifier
+	ID string `json:"id"`
+	// From User who sent the query
+	From User `json:"from"`
+	// InvoicePayload Bot-specified invoice payload
+	InvoicePayload string `json:"invoice_payload"`
+	// ShippingAddress User specified shipping address
 	ShippingAddress ShippingAddress `json:"shipping_address"`
 }
 
@@ -32,21 +47,31 @@ type ShippingQuery struct {
 // Since: Bot API 3.0
 // See https://core.telegram.org/bots/api#shippingaddress
 type ShippingAddress struct {
+	// CountryCode Two-letter ISO 3166-1 alpha-2 country code
 	CountryCode string `json:"country_code"`
-	State       string `json:"state"`
-	City        string `json:"city"`
+	// State State, if applicable
+	State string `json:"state"`
+	// City City
+	City string `json:"city"`
+	// StreetLine1 First line for the address
 	StreetLine1 string `json:"street_line1"`
+	// StreetLine2 Second line for the address
 	StreetLine2 string `json:"street_line2"`
-	PostCode    string `json:"post_code"`
+	// PostCode Address post code
+	PostCode string `json:"post_code"`
 }
 
 // OrderInfo represents information about an order.
 // Since: Bot API 3.0
 // See https://core.telegram.org/bots/api#orderinfo
 type OrderInfo struct {
-	Name            string          `json:"name"`
-	PhoneNumber     string          `json:"phone_number"`
-	Email           string          `json:"email"`
+	// Name Optional. User name
+	Name string `json:"name"`
+	// PhoneNumber Optional. User's phone number
+	PhoneNumber string `json:"phone_number"`
+	// Email Optional. User email
+	Email string `json:"email"`
+	// ShippingAddress Optional. User shipping address
 	ShippingAddress ShippingAddress `json:"shipping_address"`
 }
 
@@ -54,20 +79,31 @@ type OrderInfo struct {
 // Since: Bot API 3.0
 // See https://core.telegram.org/bots/api#precheckoutquery
 type PreCheckoutQuery struct {
-	ID               string     `json:"id"`
-	From             User       `json:"from"`
-	Currency         string     `json:"currency"`
-	TotalAmount      int        `json:"total_amount"`
-	InvoicePayload   string     `json:"invoice_payload"`
-	ShippingOptionID string     `json:"shipping_option_id"`
-	OrderInfo        *OrderInfo `json:"order_info,omitempty"`
+	// ID Unique query identifier
+	ID string `json:"id"`
+	// From User who sent the query
+	From User `json:"from"`
+	// Currency Three-letter ISO 4217 currency code, or “XTR” for payments in Telegram Stars
+	Currency string `json:"currency"`
+	// TotalAmount Total price in the smallest units of the currency (integer, not float/double). For example,
+	// for a price of US$ 1.45 pass amount = 145. See the exp parameter in currencies.json, it shows the number
+	// of digits past the decimal point for each currency (2 for the majority of currencies).
+	TotalAmount int `json:"total_amount"`
+	// InvoicePayload Bot-specified invoice payload
+	InvoicePayload string `json:"invoice_payload"`
+	// ShippingOptionID Optional. Identifier of the shipping option chosen by the user
+	ShippingOptionID string `json:"shipping_option_id"`
+	// OrderInfo Optional. Order information provided by the user
+	OrderInfo *OrderInfo `json:"order_info,omitempty"`
 }
 
 // PaidMediaPurchased represents a purchased paid media.
 // Since: Bot API 7.10
 // See https://core.telegram.org/bots/api#paidmediapurchased
 type PaidMediaPurchased struct {
-	From             User   `json:"from"`
+	// From User who purchased the media
+	From User `json:"from"`
+	// PaidMediaPayload Bot-specified paid media payload
 	PaidMediaPayload string `json:"paid_media_payload"`
 }
 
@@ -75,35 +111,59 @@ type PaidMediaPurchased struct {
 // Since: Bot API 3.0
 // See https://core.telegram.org/bots/api#shippingoption
 type ShippingOption struct {
-	ID     string         `json:"id"`
-	Title  string         `json:"title"`
+	// ID Shipping option identifier
+	ID string `json:"id"`
+	// Title Option title
+	Title string `json:"title"`
+	// Prices List of price portions
 	Prices []LabeledPrice `json:"prices"`
 }
 
 // SuccessfulPayment contains basic information about a successful payment.
 // Since: Bot API 3.0
 type SuccessfulPayment struct {
-	Currency       string `json:"currency"`
-	TotalAmount    int    `json:"total_amount"`
+	// Currency Three-letter ISO 4217 currency code, or “XTR” for payments in Telegram Stars
+	Currency string `json:"currency"`
+	// TotalAmount Total price in the smallest units of the currency (integer, not float/double). For example,
+	// for a price of US$ 1.45 pass amount = 145. See the exp parameter in currencies.json, it shows the number
+	// of digits past the decimal point for each currency (2 for the majority of currencies).
+	TotalAmount int `json:"total_amount"`
+	// InvoicePayload Bot-specified invoice payload
 	InvoicePayload string `json:"invoice_payload"`
 
-	SubscriptionExpirationDate int        `json:"subscription_expiration_date,omitempty"` // Since: Bot API 8.0
-	IsRecurring                bool       `json:"is_recurring,omitempty"`                 // Since: Bot API 8.0
-	IsFirstRecurring           bool       `json:"is_first_recurring,omitempty"`           // Since: Bot API 8.0
-	ShippingOptionID           string     `json:"shipping_option_id,omitempty"`
-	OrderInfo                  *OrderInfo `json:"order_info,omitempty"`
+	// SubscriptionExpirationDate Optional. Expiration date of the subscription, in Unix time; for recurring
+	// payments only
+	SubscriptionExpirationDate int `json:"subscription_expiration_date,omitempty"` // Since: Bot API 8.0
+	// IsRecurring Optional. True, if the payment is a recurring payment for a subscription
+	IsRecurring bool `json:"is_recurring,omitempty"` // Since: Bot API 8.0
+	// IsFirstRecurring Optional. True, if the payment is the first payment for a subscription
+	IsFirstRecurring bool `json:"is_first_recurring,omitempty"` // Since: Bot API 8.0
+	// ShippingOptionID Optional. Identifier of the shipping option chosen by the user
+	ShippingOptionID string `json:"shipping_option_id,omitempty"`
+	// OrderInfo Optional. Order information provided by the user
+	OrderInfo *OrderInfo `json:"order_info,omitempty"`
 
+	// TelegramPaymentChargeID Telegram payment identifier
 	TelegramPaymentChargeID string `json:"telegram_payment_charge_id"`
-	ProviderPaymentChargeID string `json:"proviced_payment_charge_id"`
+	// ProviderPaymentChargeID Provider payment identifier
+	ProviderPaymentChargeID string `json:"provider_payment_charge_id"`
 }
 
 // RefundedPayment contains basic information about a refunded payment.
 // Since: Bot API 7.7
 type RefundedPayment struct {
-	Currency       string `json:"currency"`
-	TotalAmount    int    `json:"total_amount"`
+	// Currency Three-letter ISO 4217 currency code, or “XTR” for payments in Telegram Stars. Currently,
+	// always “XTR”.
+	Currency string `json:"currency"`
+	// TotalAmount Total refunded price in the smallest units of the currency (integer, not float/double). For
+	// example, for a price of US$ 1.45, total_amount = 145. See the exp parameter in currencies.json, it shows
+	// the number of digits past the decimal point for each currency (2 for the majority of currencies).
+	TotalAmount int `json:"total_amount"`
+	// InvoicePayload Bot-specified invoice payload
 	InvoicePayload string `json:"invoice_payload"`
 
+	// TelegramPaymentChargeID Telegram payment identifier
 	TelegramPaymentChargeID string `json:"telegram_payment_charge_id"`
-	ProviderPaymentChargeID string `json:"proviced_payment_charge_id,omitempty"`
+	// ProviderPaymentChargeID Optional. Provider payment identifier
+	ProviderPaymentChargeID string `json:"provider_payment_charge_id,omitempty"`
 }

tgapi/pool.go

@@ -2,6 +2,7 @@ package tgapi
 
 import (
 	"context"
+	"fmt"
 	"sync"
 )
 
@@ -126,10 +127,14 @@ func (p *workerPool) worker() {
 }
 
 func (p *workerPool) executeEnvelope(envelope requestEnvelope) {
-	value, err := envelope.doFunc(envelope.ctx)
-	envelope.resultCh <- requestResult{
-		value: value,
-		err:   err,
-	}
-	close(envelope.resultCh)
+	result := requestResult{}
+	defer func() {
+		if recovered := recover(); recovered != nil {
+			result.value = nil
+			result.err = fmt.Errorf("%w: %v", ErrPoolWorkerPanic, recovered)
+		}
+		envelope.resultCh <- result
+		close(envelope.resultCh)
+	}()
+	result.value, result.err = envelope.doFunc(envelope.ctx)
 }

tgapi/pool_test.go

@@ -18,6 +18,34 @@ func TestWorkerPoolSubmitAfterStop(t *testing.T) {
 	}
 }
 
+func TestWorkerPoolRecoversTaskPanicAndContinues(t *testing.T) {
+	pool := newWorkerPool(1, 2)
+	pool.start()
+	defer pool.stop()
+
+	panicked, err := pool.submit(context.Background(), func(context.Context) (any, error) {
+		panic("boom")
+	})
+	if err != nil {
+		t.Fatalf("submit panic task returned error: %v", err)
+	}
+	result := <-panicked
+	if !errors.Is(result.err, ErrPoolWorkerPanic) {
+		t.Fatalf("expected ErrPoolWorkerPanic, got %v", result.err)
+	}
+
+	continued, err := pool.submit(context.Background(), func(context.Context) (any, error) {
+		return "ok", nil
+	})
+	if err != nil {
+		t.Fatalf("submit follow-up returned error: %v", err)
+	}
+	result = <-continued
+	if result.err != nil || result.value != "ok" {
+		t.Fatalf("worker did not continue: %#v", result)
+	}
+}
+
 func TestWorkerPoolQueueFull(t *testing.T) {
 	pool := newWorkerPool(1, 1)
 	pool.start()

tgapi/rich_block_types.go

@@ -0,0 +1,617 @@
+package tgapi
+
+import "encoding/json"
+
+// RichBlock is a block in a structured rich message.
+//
+// Since: Bot API 10.1
+type RichBlock interface {
+	isRichBlock()
+}
+
+// RichBlockCaption is the caption of a media block or container.
+//
+// Since: Bot API 10.1
+type RichBlockCaption struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// Credit contains attribution displayed with the block.
+	Credit RichText
+}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (c RichBlockCaption) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Text   RichText `json:"text"`
+		Credit RichText `json:"credit,omitempty"`
+	}{c.Text, c.Credit})
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+//
+// Since: Bot API 10.1
+func (c *RichBlockCaption) UnmarshalJSON(data []byte) error {
+	var raw struct {
+		Text   json.RawMessage `json:"text"`
+		Credit json.RawMessage `json:"credit"`
+	}
+	if err := json.Unmarshal(data, &raw); err != nil {
+		return err
+	}
+	text, err := parseOptRichText(raw.Text)
+	if err != nil {
+		return err
+	}
+	credit, err := parseOptRichText(raw.Credit)
+	if err != nil {
+		return err
+	}
+	*c = RichBlockCaption{text, credit}
+	return nil
+}
+
+// RichBlockListItem is a single list item. Label is the ready-to-display
+// visible marker ("1.", "c.", "vii.", "•"): the server renders it itself
+// when parsing html/markdown.
+//
+// Since: Bot API 10.1
+type RichBlockListItem struct {
+	// Label contains the list-item label.
+	Label string
+	// Blocks contains the nested rich-message blocks.
+	Blocks []RichBlock
+	// HasCheckbox reports whether the list item includes a checkbox.
+	HasCheckbox bool
+	// IsChecked reports whether the list-item checkbox is checked.
+	IsChecked bool
+	// Value is the numeric marker value for an ordered list item.
+	Value int // for ordered lists: numeric value of the marker
+	// Type selects the ordered-list marker style: a, A, i, I, or 1.
+	Type RichBlockListItemType // for ordered lists: "a", "A", "i", "I" or "1"
+}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (i RichBlockListItem) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Label       string                `json:"label"`
+		Blocks      []RichBlock           `json:"blocks"`
+		HasCheckbox bool                  `json:"has_checkbox,omitempty"`
+		IsChecked   bool                  `json:"is_checked,omitempty"`
+		Value       int                   `json:"value,omitempty"`
+		Type        RichBlockListItemType `json:"type,omitempty"`
+	}{i.Label, i.Blocks, i.HasCheckbox, i.IsChecked, i.Value, i.Type})
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+//
+// Since: Bot API 10.1
+func (i *RichBlockListItem) UnmarshalJSON(data []byte) error {
+	var raw struct {
+		Label       string                `json:"label"`
+		Blocks      json.RawMessage       `json:"blocks"`
+		HasCheckbox bool                  `json:"has_checkbox"`
+		IsChecked   bool                  `json:"is_checked"`
+		Value       int                   `json:"value"`
+		Type        RichBlockListItemType `json:"type"`
+	}
+	if err := json.Unmarshal(data, &raw); err != nil {
+		return err
+	}
+	blocks, err := unmarshalRichBlocks(raw.Blocks)
+	if err != nil {
+		return err
+	}
+	*i = RichBlockListItem{raw.Label, blocks, raw.HasCheckbox, raw.IsChecked, raw.Value, raw.Type}
+	return nil
+}
+
+// RichBlockTableCell is a table cell. An empty Text means an invisible cell.
+//
+// Since: Bot API 10.1
+type RichBlockTableCell struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// IsHeader marks the table cell as a header cell.
+	IsHeader bool
+	// ColSpan is the number of table columns spanned by the cell.
+	ColSpan int
+	// RowSpan is the number of table rows spanned by the cell.
+	RowSpan int
+	// Align is the horizontal alignment: left, center, or right.
+	Align string // "left", "center" or "right"
+	// VAlign is the vertical alignment: top, middle, or bottom.
+	VAlign string // "top", "middle" or "bottom"
+}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (c RichBlockTableCell) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Text     RichText `json:"text,omitempty"`
+		IsHeader bool     `json:"is_header,omitempty"`
+		Colspan  int      `json:"colspan,omitempty"`
+		Rowspan  int      `json:"rowspan,omitempty"`
+		Align    string   `json:"align,omitempty"`
+		VAlign   string   `json:"valign,omitempty"`
+	}{c.Text, c.IsHeader, c.ColSpan, c.RowSpan, c.Align, c.VAlign})
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+//
+// Since: Bot API 10.1
+func (c *RichBlockTableCell) UnmarshalJSON(data []byte) error {
+	var raw struct {
+		Text     json.RawMessage `json:"text"`
+		IsHeader bool            `json:"is_header"`
+		Colspan  int             `json:"colspan"`
+		Rowspan  int             `json:"rowspan"`
+		Align    string          `json:"align"`
+		VAlign   string          `json:"valign"`
+	}
+	if err := json.Unmarshal(data, &raw); err != nil {
+		return err
+	}
+	text, err := parseOptRichText(raw.Text)
+	if err != nil {
+		return err
+	}
+	*c = RichBlockTableCell{text, raw.IsHeader, raw.Colspan, raw.Rowspan, raw.Align, raw.VAlign}
+	return nil
+}
+
+// RichBlockWrap covers all blocks that have only a text field.
+//
+// Since: Bot API 10.1
+type RichBlockWrap struct {
+	// Tag identifies the rich-text formatting wrapper.
+	Tag string
+	// Text contains the formatted or plain text content.
+	Text RichText
+}
+
+func (RichBlockWrap) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockWrap) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type string   `json:"type"`
+		Text RichText `json:"text"`
+	}{b.Tag, b.Text})
+}
+
+var richBlockWrapTags = map[string]bool{
+	"paragraph": true, "footer": true, "thinking": true,
+}
+
+// RichBlockSectionHeading is a section heading block.
+//
+// Since: Bot API 10.1
+type RichBlockSectionHeading struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// Size is the heading level from 1 through 6, where 1 is largest.
+	Size int // 1-6, 1 is the largest
+}
+
+func (RichBlockSectionHeading) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockSectionHeading) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type string   `json:"type"`
+		Text RichText `json:"text"`
+		Size int      `json:"size"`
+	}{"heading", b.Text, b.Size})
+}
+
+// RichBlockPreformatted is a preformatted code block.
+//
+// Since: Bot API 10.1
+type RichBlockPreformatted struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// Language identifies the programming language used for syntax highlighting.
+	Language string
+}
+
+func (RichBlockPreformatted) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockPreformatted) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type     string   `json:"type"`
+		Text     RichText `json:"text"`
+		Language string   `json:"language,omitempty"`
+	}{"pre", b.Text, b.Language})
+}
+
+// RichBlockQuotation is a block quotation with block-level content
+// (officially RichBlockBlockQuotation).
+//
+// Since: Bot API 10.1
+type RichBlockQuotation struct {
+	// Blocks contains the nested rich-message blocks.
+	Blocks []RichBlock
+	// Credit contains attribution displayed with the block.
+	Credit RichText
+}
+
+func (RichBlockQuotation) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockQuotation) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type   string      `json:"type"`
+		Blocks []RichBlock `json:"blocks"`
+		Credit RichText    `json:"credit,omitempty"`
+	}{"blockquote", b.Blocks, b.Credit})
+}
+
+// RichBlockPullQuotation is a pull quotation with inline content.
+//
+// Since: Bot API 10.1
+type RichBlockPullQuotation struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// Credit contains attribution displayed with the block.
+	Credit RichText
+}
+
+func (RichBlockPullQuotation) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockPullQuotation) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type   string   `json:"type"`
+		Text   RichText `json:"text"`
+		Credit RichText `json:"credit,omitempty"`
+	}{"pullquote", b.Text, b.Credit})
+}
+
+// RichBlockList is a list block.
+//
+// Since: Bot API 10.1
+type RichBlockList struct {
+	// Items contains the list items.
+	Items []RichBlockListItem
+}
+
+func (RichBlockList) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockList) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type  string              `json:"type"`
+		Items []RichBlockListItem `json:"items"`
+	}{"list", b.Items})
+}
+
+// RichBlockCollage is a collage of media blocks.
+//
+// Since: Bot API 10.1
+type RichBlockCollage struct {
+	// Blocks contains the nested rich-message blocks.
+	Blocks []RichBlock
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption
+}
+
+func (RichBlockCollage) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockCollage) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type    string            `json:"type"`
+		Blocks  []RichBlock       `json:"blocks"`
+		Caption *RichBlockCaption `json:"caption,omitempty"`
+	}{"collage", b.Blocks, b.Caption})
+}
+
+// RichBlockSlideshow is a slideshow of media blocks.
+//
+// Since: Bot API 10.1
+type RichBlockSlideshow struct {
+	// Blocks contains the nested rich-message blocks.
+	Blocks []RichBlock
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption
+}
+
+func (RichBlockSlideshow) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockSlideshow) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type    string            `json:"type"`
+		Blocks  []RichBlock       `json:"blocks"`
+		Caption *RichBlockCaption `json:"caption,omitempty"`
+	}{"slideshow", b.Blocks, b.Caption})
+}
+
+// RichBlockDetails is an expandable block with an inline summary.
+//
+// Since: Bot API 10.1
+type RichBlockDetails struct {
+	// Summary contains the visible summary of a details block.
+	Summary RichText
+	// Blocks contains the nested rich-message blocks.
+	Blocks []RichBlock
+	// IsOpen requests the details block to be expanded initially.
+	IsOpen bool
+}
+
+func (RichBlockDetails) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockDetails) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type    string      `json:"type"`
+		Summary RichText    `json:"summary"`
+		Blocks  []RichBlock `json:"blocks"`
+		IsOpen  bool        `json:"is_open,omitempty"`
+	}{"details", b.Summary, b.Blocks, b.IsOpen})
+}
+
+// RichBlockTable is a table block.
+//
+// Since: Bot API 10.1
+type RichBlockTable struct {
+	// Cells contains the table rows and cells.
+	Cells [][]RichBlockTableCell
+	// IsBordered requests visible table borders.
+	IsBordered bool
+	// IsStriped requests alternating table row styling.
+	IsStriped bool
+	// Caption contains the media or block caption.
+	Caption RichText
+}
+
+func (RichBlockTable) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockTable) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type       string                 `json:"type"`
+		Cells      [][]RichBlockTableCell `json:"cells"`
+		IsBordered bool                   `json:"is_bordered,omitempty"`
+		IsStriped  bool                   `json:"is_striped,omitempty"`
+		Caption    RichText               `json:"caption,omitempty"`
+	}{"table", b.Cells, b.IsBordered, b.IsStriped, b.Caption})
+}
+
+// RichBlockMap is a location map block.
+//
+// Since: Bot API 10.1
+type RichBlockMap struct {
+	// Location contains the map location.
+	Location Location
+	// Zoom is the map zoom level in the range 13 through 20.
+	Zoom int // 13-20
+	// Width is the requested media or map width in pixels.
+	Width int
+	// Height is the requested media or map height in pixels.
+	Height int
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption
+}
+
+func (RichBlockMap) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockMap) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type     string            `json:"type"`
+		Location Location          `json:"location"`
+		Zoom     int               `json:"zoom"`
+		Width    int               `json:"width"`
+		Height   int               `json:"height"`
+		Caption  *RichBlockCaption `json:"caption,omitempty"`
+	}{"map", b.Location, b.Zoom, b.Width, b.Height, b.Caption})
+}
+
+// RichBlockPhoto is a photo block.
+//
+// Since: Bot API 10.1
+type RichBlockPhoto struct {
+	// Photo contains or identifies the associated photo.
+	Photo []PhotoSize
+	// HasSpoiler reports whether the media is covered by a spoiler.
+	HasSpoiler bool
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption
+}
+
+func (RichBlockPhoto) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockPhoto) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type       string            `json:"type"`
+		Photo      []PhotoSize       `json:"photo"`
+		HasSpoiler bool              `json:"has_spoiler,omitempty"`
+		Caption    *RichBlockCaption `json:"caption,omitempty"`
+	}{"photo", b.Photo, b.HasSpoiler, b.Caption})
+}
+
+// RichBlockVideo is a video block.
+//
+// Since: Bot API 10.1
+type RichBlockVideo struct {
+	// Video contains the video rendered by the block.
+	Video Video
+	// HasSpoiler reports whether the media is covered by a spoiler.
+	HasSpoiler bool
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption
+}
+
+func (RichBlockVideo) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockVideo) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type       string            `json:"type"`
+		Video      Video             `json:"video"`
+		HasSpoiler bool              `json:"has_spoiler,omitempty"`
+		Caption    *RichBlockCaption `json:"caption,omitempty"`
+	}{"video", b.Video, b.HasSpoiler, b.Caption})
+}
+
+// RichBlockAudio is an audio block.
+//
+// Since: Bot API 10.1
+type RichBlockAudio struct {
+	// Audio contains the audio rendered by the block.
+	Audio Audio
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption
+}
+
+func (RichBlockAudio) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockAudio) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type    string            `json:"type"`
+		Audio   Audio             `json:"audio"`
+		Caption *RichBlockCaption `json:"caption,omitempty"`
+	}{"audio", b.Audio, b.Caption})
+}
+
+// RichBlockAnimation is an animation block.
+//
+// Since: Bot API 10.1
+type RichBlockAnimation struct {
+	// Animation contains the animation rendered by the block.
+	Animation Animation
+	// HasSpoiler reports whether the media is covered by a spoiler.
+	HasSpoiler bool
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption
+}
+
+func (RichBlockAnimation) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockAnimation) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type       string            `json:"type"`
+		Animation  Animation         `json:"animation"`
+		HasSpoiler bool              `json:"has_spoiler,omitempty"`
+		Caption    *RichBlockCaption `json:"caption,omitempty"`
+	}{"animation", b.Animation, b.HasSpoiler, b.Caption})
+}
+
+// RichBlockVoiceNote is a voice note block.
+//
+// Since: Bot API 10.1
+type RichBlockVoiceNote struct {
+	// VoiceNote contains the voice note rendered by the block.
+	VoiceNote Voice
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption
+}
+
+func (RichBlockVoiceNote) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockVoiceNote) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type      string            `json:"type"`
+		VoiceNote Voice             `json:"voice_note"`
+		Caption   *RichBlockCaption `json:"caption,omitempty"`
+	}{"voice_note", b.VoiceNote, b.Caption})
+}
+
+// RichBlockDivider is a horizontal divider block.
+//
+// Since: Bot API 10.1
+type RichBlockDivider struct{}
+
+func (RichBlockDivider) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockDivider) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type string `json:"type"`
+	}{"divider"})
+}
+
+// RichBlockMathematicalExpression is a block-level mathematical expression.
+//
+// Since: Bot API 10.1
+type RichBlockMathematicalExpression struct {
+	// Expression contains the mathematical expression source.
+	Expression string
+}
+
+func (RichBlockMathematicalExpression) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockMathematicalExpression) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type       string `json:"type"`
+		Expression string `json:"expression"`
+	}{"mathematical_expression", b.Expression})
+}
+
+// RichBlockAnchor is a named anchor block that anchor links can point to.
+//
+// Since: Bot API 10.1
+type RichBlockAnchor struct {
+	// Name is the user-facing or reference name of the value.
+	Name string
+}
+
+func (RichBlockAnchor) isRichBlock() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (b RichBlockAnchor) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type string `json:"type"`
+		Name string `json:"name"`
+	}{"anchor", b.Name})
+}

tgapi/rich_input_types.go

@@ -0,0 +1,427 @@
+package tgapi
+
+// InputRichType identifies the JSON type of an input rich block.
+//
+// Since: Bot API 10.2
+type InputRichType string
+
+const (
+	// InputRichTypeParagraph identifies a paragraph block.
+	InputRichTypeParagraph InputRichType = "paragraph"
+	// InputRichTypeSectionHeading identifies a section-heading block.
+	InputRichTypeSectionHeading InputRichType = "heading"
+	// InputRichTypePre identifies a preformatted block.
+	InputRichTypePre InputRichType = "pre"
+	// InputRichTypeFooter identifies a footer block.
+	InputRichTypeFooter InputRichType = "footer"
+	// InputRichTypeDivider identifies a divider block.
+	InputRichTypeDivider InputRichType = "divider"
+	// InputRichTypeMathematicalExpression identifies a mathematical-expression block.
+	InputRichTypeMathematicalExpression InputRichType = "mathematical_expression"
+	// InputRichTypeAnchor identifies an anchor block.
+	InputRichTypeAnchor InputRichType = "anchor"
+	// InputRichTypeList identifies a list block.
+	InputRichTypeList InputRichType = "list"
+	// InputRichTypeBlockQuotation identifies a block-quotation block.
+	InputRichTypeBlockQuotation InputRichType = "blockquote"
+	// InputRichTypePullQuotation identifies a pull-quotation block.
+	InputRichTypePullQuotation InputRichType = "pullquote"
+	// InputRichTypeCollage identifies a collage block.
+	InputRichTypeCollage InputRichType = "collage"
+	// InputRichTypeSlideshow identifies a slideshow block.
+	InputRichTypeSlideshow InputRichType = "slideshow"
+	// InputRichTypeTable identifies a table block.
+	InputRichTypeTable InputRichType = "table"
+	// InputRichTypeDetails identifies an expandable details block.
+	InputRichTypeDetails InputRichType = "details"
+	// InputRichTypeMap identifies a map block.
+	InputRichTypeMap InputRichType = "map"
+	// InputRichTypeAnimation identifies an animation block.
+	InputRichTypeAnimation InputRichType = "animation"
+	// InputRichTypeAudio identifies an audio block.
+	InputRichTypeAudio InputRichType = "audio"
+	// InputRichTypePhoto identifies a photo block.
+	InputRichTypePhoto InputRichType = "photo"
+	// InputRichTypeVideo identifies a video block.
+	InputRichTypeVideo InputRichType = "video"
+	// InputRichTypeVoiceNote identifies a voice-note block.
+	InputRichTypeVoiceNote InputRichType = "voice_note"
+	// InputRichTypeThinking identifies a thinking block.
+	InputRichTypeThinking InputRichType = "thinking"
+)
+
+// InputRichBlock represents a block available to format an outgoing rich message.
+//
+// Since: Bot API 10.2
+type InputRichBlock interface {
+	isInputRichBlock()
+}
+
+// InputRichBlockParagraph is a text paragraph corresponding to the HTML <p> tag.
+//
+// Since: Bot API 10.2
+type InputRichBlockParagraph struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Text contains the formatted or plain text content.
+	Text RichText `json:"text"`
+}
+
+func (InputRichBlockParagraph) isInputRichBlock() {}
+
+// InputRichBlockSectionHeading is a section heading corresponding to an HTML <h1> through <h6> tag.
+//
+// Since: Bot API 10.2
+type InputRichBlockSectionHeading struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Text contains the formatted or plain text content.
+	Text RichText `json:"text"`
+	// Size selects the section heading level from 1 through 6.
+	Size uint8 `json:"size"`
+}
+
+func (InputRichBlockSectionHeading) isInputRichBlock() {}
+
+// InputRichBlockPreformatted is a preformatted text block corresponding to nested HTML <pre> and <code> tags.
+//
+// Since: Bot API 10.2
+type InputRichBlockPreformatted struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Text contains the formatted or plain text content.
+	Text RichText `json:"text"`
+	// Language identifies the programming language used for syntax highlighting.
+	Language string `json:"language,omitempty"`
+}
+
+func (InputRichBlockPreformatted) isInputRichBlock() {}
+
+// InputRichBlockFooter is a footer corresponding to the HTML <footer> tag.
+//
+// Since: Bot API 10.2
+type InputRichBlockFooter struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Text contains the formatted or plain text content.
+	Text RichText `json:"text"`
+}
+
+func (InputRichBlockFooter) isInputRichBlock() {}
+
+// InputRichBlockDivider is a divider corresponding to the HTML <hr/> tag.
+//
+// Since: Bot API 10.2
+type InputRichBlockDivider struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+}
+
+func (InputRichBlockDivider) isInputRichBlock() {}
+
+// InputRichBlockMath is a block containing a mathematical expression in LaTeX format,
+// corresponding to the custom HTML <tg-math-block> tag.
+//
+// Since: Bot API 10.2
+type InputRichBlockMath struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Expression contains the mathematical expression source.
+	Expression string `json:"expression"`
+}
+
+func (InputRichBlockMath) isInputRichBlock() {}
+
+// InputRichBlockAnchor is a block containing an anchor corresponding to an HTML <a> tag with a name attribute.
+//
+// Since: Bot API 10.2
+type InputRichBlockAnchor struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Name is the user-facing or reference name of the value.
+	Name string `json:"name"`
+}
+
+func (InputRichBlockAnchor) isInputRichBlock() {}
+
+// RichBlockListItemType identifies an ordered-list label style.
+//
+// Since: Bot API 10.2
+type RichBlockListItemType string
+
+const (
+	// InputRichBlockListItemTypeLower uses lowercase letters.
+	InputRichBlockListItemTypeLower RichBlockListItemType = "a"
+	// InputRichBlockListItemTypeUpper uses uppercase letters.
+	InputRichBlockListItemTypeUpper RichBlockListItemType = "A"
+	// InputRichBlockListItemTypeRomanLow uses lowercase Roman numerals.
+	InputRichBlockListItemTypeRomanLow RichBlockListItemType = "i"
+	// InputRichBlockListItemTypeRomanUpper uses uppercase Roman numerals.
+	InputRichBlockListItemTypeRomanUpper RichBlockListItemType = "I"
+	// InputRichBlockListItemTypeDecimal uses decimal numbers.
+	InputRichBlockListItemTypeDecimal RichBlockListItemType = "1"
+)
+
+// InputRichBlockListItem represents an item in an input rich-message list.
+//
+// Since: Bot API 10.2
+type InputRichBlockListItem struct {
+	// Blocks contains the nested rich-message blocks.
+	Blocks []InputRichBlock `json:"blocks"`
+	// HasCheckbox reports whether the list item includes a checkbox.
+	HasCheckbox bool `json:"has_checkbox,omitempty"`
+	// IsChecked reports whether the list-item checkbox is checked.
+	IsChecked bool `json:"is_checked,omitempty"`
+	// Value sets the numeric marker value for an ordered list item.
+	Value int `json:"value,omitempty"`
+	// Type is the Bot API type discriminator.
+	Type RichBlockListItemType `json:"type,omitempty"`
+}
+
+// NewInputRichBlockListItem creates a list item containing blocks.
+//
+// Since: Bot API 10.2
+func NewInputRichBlockListItem(blocks ...InputRichBlock) *InputRichBlockListItem {
+	return &InputRichBlockListItem{Blocks: blocks}
+}
+
+// SetCheckbox configures whether the list item has a checkbox.
+//
+// Since: Bot API 10.2
+func (i *InputRichBlockListItem) SetCheckbox(hasCheckbox bool) *InputRichBlockListItem {
+	i.HasCheckbox = hasCheckbox
+	return i
+}
+
+// Check marks the list item's checkbox as checked.
+//
+// Since: Bot API 10.2
+func (i *InputRichBlockListItem) Check() *InputRichBlockListItem {
+	i.IsChecked = true
+	return i
+}
+
+// SetValue sets the numeric value of an ordered-list item.
+//
+// Since: Bot API 10.2
+func (i *InputRichBlockListItem) SetValue(val int) *InputRichBlockListItem {
+	i.Value = val
+	return i
+}
+
+// SetType sets the label style of an ordered-list item.
+//
+// Since: Bot API 10.2
+func (i *InputRichBlockListItem) SetType(t RichBlockListItemType) *InputRichBlockListItem {
+	i.Type = t
+	return i
+}
+
+// InputRichBlockList is a list of input rich-message blocks.
+//
+// Since: Bot API 10.2
+type InputRichBlockList struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Items contains the list items.
+	Items []InputRichBlockListItem `json:"items"`
+}
+
+func (InputRichBlockList) isInputRichBlock() {}
+
+// InputRichBlockBlockQuotation is a block quotation in an input rich message.
+//
+// Since: Bot API 10.2
+type InputRichBlockBlockQuotation struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Blocks contains the nested rich-message blocks.
+	Blocks []InputRichBlock `json:"blocks"`
+	// Credit contains attribution displayed with the block.
+	Credit *RichText `json:"credit,omitempty"`
+}
+
+func (InputRichBlockBlockQuotation) isInputRichBlock() {}
+
+// InputRichBlockPullQuotation is a centered quotation in an input rich message.
+//
+// Since: Bot API 10.2
+type InputRichBlockPullQuotation struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Text contains the formatted or plain text content.
+	Text RichText `json:"text"`
+	// Credit contains attribution displayed with the block.
+	Credit *RichText `json:"credit,omitempty"`
+}
+
+func (InputRichBlockPullQuotation) isInputRichBlock() {}
+
+// InputRichBlockCollage is a collage in an input rich message.
+//
+// Since: Bot API 10.2
+type InputRichBlockCollage struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Blocks contains the nested rich-message blocks.
+	Blocks []InputRichBlock `json:"blocks"`
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption `json:"caption,omitempty"`
+}
+
+func (InputRichBlockCollage) isInputRichBlock() {}
+
+// InputRichBlockSlideshow is a slideshow in an input rich message.
+//
+// Since: Bot API 10.2
+type InputRichBlockSlideshow struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Blocks contains the nested rich-message blocks.
+	Blocks []InputRichBlock `json:"blocks"`
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption `json:"caption,omitempty"`
+}
+
+func (InputRichBlockSlideshow) isInputRichBlock() {}
+
+// InputRichBlockTable is a table in an input rich message.
+//
+// Since: Bot API 10.2
+type InputRichBlockTable struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Cells contains the table rows and cells.
+	Cells [][]RichBlockTableCell `json:"cells"`
+	// IsBordered requests visible table borders.
+	IsBordered bool `json:"is_bordered,omitempty"`
+	// IsStriped requests alternating table row styling.
+	IsStriped bool `json:"is_striped,omitempty"`
+	// Caption contains the media or block caption.
+	Caption *RichText `json:"caption,omitempty"`
+}
+
+func (InputRichBlockTable) isInputRichBlock() {}
+
+// InputRichBlockDetails is an expandable block in an input rich message.
+//
+// Since: Bot API 10.2
+type InputRichBlockDetails struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Summary contains the visible summary of a details block.
+	Summary RichText `json:"summary"`
+	// Blocks contains the nested rich-message blocks.
+	Blocks []InputRichBlock `json:"blocks"`
+	// IsOpen requests the details block to be expanded initially.
+	IsOpen bool `json:"is_open,omitempty"`
+}
+
+func (InputRichBlockDetails) isInputRichBlock() {}
+
+// InputRichBlockMap is a location map in an input rich message.
+//
+// Since: Bot API 10.2
+type InputRichBlockMap struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Location contains the map location.
+	Location Location `json:"location"`
+	// Zoom sets the map zoom level.
+	Zoom uint8 `json:"zoom,omitempty"`
+	// Width is the requested media or map width in pixels.
+	Width uint16 `json:"width,omitempty"`
+	// Height is the requested media or map height in pixels.
+	Height uint16 `json:"height,omitempty"`
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption `json:"caption,omitempty"`
+}
+
+func (InputRichBlockMap) isInputRichBlock() {}
+
+// InputRichBlockAnimation is an animation block corresponding to the HTML <video> tag.
+// The animation caption is ignored; use Caption instead.
+//
+// Since: Bot API 10.2
+type InputRichBlockAnimation struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Animation contains the animation rendered by the block.
+	Animation InputMedia `json:"animation"`
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption `json:"caption,omitempty"`
+}
+
+func (InputRichBlockAnimation) isInputRichBlock() {}
+
+// InputRichBlockAudio is a music-file block corresponding to the HTML <audio> tag.
+// The audio caption is ignored; use Caption instead.
+//
+// Since: Bot API 10.2
+type InputRichBlockAudio struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Audio contains the audio rendered by the block.
+	Audio InputMedia `json:"audio"`
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption `json:"caption,omitempty"`
+}
+
+func (InputRichBlockAudio) isInputRichBlock() {}
+
+// InputRichBlockPhoto is a photo block corresponding to the HTML <img> tag.
+// The photo caption is ignored; use Caption instead.
+//
+// Since: Bot API 10.2
+type InputRichBlockPhoto struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Photo contains or identifies the associated photo.
+	Photo InputMedia `json:"photo"`
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption `json:"caption,omitempty"`
+}
+
+func (InputRichBlockPhoto) isInputRichBlock() {}
+
+// InputRichBlockVideo is a video block corresponding to the HTML <video> tag.
+// The video caption is ignored; use Caption instead.
+//
+// Since: Bot API 10.2
+type InputRichBlockVideo struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Video contains the video rendered by the block.
+	Video InputMedia `json:"video"`
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption `json:"caption,omitempty"`
+}
+
+func (InputRichBlockVideo) isInputRichBlock() {}
+
+// InputRichBlockVoiceNote is a voice-note block corresponding to the HTML <audio> tag.
+// The voice-note caption is ignored; use Caption instead.
+//
+// Since: Bot API 10.2
+type InputRichBlockVoiceNote struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// VoiceNote contains the voice note rendered by the block.
+	VoiceNote InputMedia `json:"voice_note"`
+	// Caption contains the media or block caption.
+	Caption *RichBlockCaption `json:"caption,omitempty"`
+}
+
+func (InputRichBlockVoiceNote) isInputRichBlock() {}
+
+// InputRichBlockThinking is a block for displaying a thinking state.
+//
+// Since: Bot API 10.2
+type InputRichBlockThinking struct {
+	// Type is the Bot API type discriminator.
+	Type InputRichType `json:"type"`
+	// Text contains the formatted or plain text content.
+	Text RichText `json:"text"`
+}
+
+func (InputRichBlockThinking) isInputRichBlock() {}

tgapi/rich_input_types_test.go

@@ -0,0 +1,65 @@
+package tgapi
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestInputRichMediaBlocksMarshal(t *testing.T) {
+	caption := RichBlockCaption{Text: RichTextPlain("caption")}
+	cases := []struct {
+		name      string
+		block     InputRichBlock
+		blockType InputRichType
+		mediaKey  string
+		mediaType InputMediaType
+	}{
+		{"animation", InputRichBlockAnimation{Type: InputRichTypeAnimation, Animation: InputMedia{Type: InputMediaTypeAnimation, Media: "animation-id"}, Caption: &caption}, InputRichTypeAnimation, "animation", InputMediaTypeAnimation},
+		{"audio", InputRichBlockAudio{Type: InputRichTypeAudio, Audio: InputMedia{Type: InputMediaTypeAudio, Media: "audio-id"}, Caption: &caption}, InputRichTypeAudio, "audio", InputMediaTypeAudio},
+		{"photo", InputRichBlockPhoto{Type: InputRichTypePhoto, Photo: InputMedia{Type: InputMediaTypePhoto, Media: "photo-id"}, Caption: &caption}, InputRichTypePhoto, "photo", InputMediaTypePhoto},
+		{"video", InputRichBlockVideo{Type: InputRichTypeVideo, Video: InputMedia{Type: InputMediaTypeVideo, Media: "video-id"}, Caption: &caption}, InputRichTypeVideo, "video", InputMediaTypeVideo},
+		{"voice note", InputRichBlockVoiceNote{Type: InputRichTypeVoiceNote, VoiceNote: InputMedia{Type: InputMediaTypeVoiceNote, Media: "voice-id"}, Caption: &caption}, InputRichTypeVoiceNote, "voice_note", InputMediaTypeVoiceNote},
+	}
+
+	for _, tt := range cases {
+		t.Run(tt.name, func(t *testing.T) {
+			data, err := json.Marshal(InputRichMessage{Blocks: []InputRichBlock{tt.block}})
+			if err != nil {
+				t.Fatalf("Marshal returned error: %v", err)
+			}
+
+			var message struct {
+				Blocks []map[string]json.RawMessage `json:"blocks"`
+			}
+			if err := json.Unmarshal(data, &message); err != nil {
+				t.Fatalf("Unmarshal returned error: %v", err)
+			}
+			if len(message.Blocks) != 1 {
+				t.Fatalf("got %d blocks, want 1", len(message.Blocks))
+			}
+
+			var blockType InputRichType
+			if err := json.Unmarshal(message.Blocks[0]["type"], &blockType); err != nil {
+				t.Fatalf("unmarshal block type: %v", err)
+			}
+			if blockType != tt.blockType {
+				t.Errorf("block type = %q, want %q", blockType, tt.blockType)
+			}
+
+			var media InputMedia
+			if err := json.Unmarshal(message.Blocks[0][tt.mediaKey], &media); err != nil {
+				t.Fatalf("unmarshal %s: %v", tt.mediaKey, err)
+			}
+			if media.Type != tt.mediaType {
+				t.Errorf("media type = %q, want %q", media.Type, tt.mediaType)
+			}
+			if message.Blocks[0]["caption"] == nil {
+				t.Error("caption is missing")
+			}
+		})
+	}
+}
+
+func TestInputRichBlockMapImplementsInputRichBlock(t *testing.T) {
+	var _ InputRichBlock = InputRichBlockMap{}
+}

tgapi/rich_text_types.go

@@ -0,0 +1,418 @@
+package tgapi
+
+import "encoding/json"
+
+// RichText is a node of the rich formatted text tree: a plain string, an
+// array, or one of the typed objects below.
+//
+// Since: Bot API 10.1
+type RichText interface {
+	isRichText()
+}
+
+// RichTextPlain is a plain text leaf.
+//
+// Since: Bot API 10.1
+type RichTextPlain string
+
+func (RichTextPlain) isRichText() {}
+
+// RichTextArray is a concatenation of rich text nodes.
+//
+// Since: Bot API 10.1
+type RichTextArray []RichText
+
+func (RichTextArray) isRichText() {}
+
+// RichTextWrap covers all "pure" wrapper nodes with a single type.
+//
+// Since: Bot API 10.1
+type RichTextWrap struct {
+	// Tag identifies the rich-text formatting wrapper.
+	Tag string
+	// Text contains the formatted or plain text content.
+	Text RichText
+}
+
+func (RichTextWrap) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (w RichTextWrap) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type string   `json:"type"`
+		Text RichText `json:"text"`
+	}{w.Tag, w.Text})
+}
+
+var richTextWrapTags = map[string]bool{
+	"bold": true, "italic": true, "underline": true,
+	"strikethrough": true, "spoiler": true, "subscript": true,
+	"superscript": true, "marked": true, "code": true,
+}
+
+// RichTextURL is rich text linking to a URL.
+//
+// Since: Bot API 10.1
+type RichTextURL struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// URL contains the HTTP URL.
+	URL string
+}
+
+func (RichTextURL) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextURL) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type string   `json:"type"`
+		Text RichText `json:"text"`
+		URL  string   `json:"url"`
+	}{"url", v.Text, v.URL})
+}
+
+// RichTextEmailAddress is rich text linking to an email address.
+//
+// Since: Bot API 10.1
+type RichTextEmailAddress struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// EmailAddress is the email address associated with the text.
+	EmailAddress string
+}
+
+func (RichTextEmailAddress) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextEmailAddress) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type         string   `json:"type"`
+		Text         RichText `json:"text"`
+		EmailAddress string   `json:"email_address"`
+	}{"email_address", v.Text, v.EmailAddress})
+}
+
+// RichTextPhoneNumber is rich text linking to a phone number.
+//
+// Since: Bot API 10.1
+type RichTextPhoneNumber struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// PhoneNumber is the phone number associated with the text.
+	PhoneNumber string
+}
+
+func (RichTextPhoneNumber) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextPhoneNumber) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type        string   `json:"type"`
+		Text        RichText `json:"text"`
+		PhoneNumber string   `json:"phone_number"`
+	}{"phone_number", v.Text, v.PhoneNumber})
+}
+
+// RichTextBankCardNumber is rich text marked as a bank card number.
+//
+// Since: Bot API 10.1
+type RichTextBankCardNumber struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// BankCardNumber is the bank card number associated with the text.
+	BankCardNumber string
+}
+
+func (RichTextBankCardNumber) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextBankCardNumber) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type           string   `json:"type"`
+		Text           RichText `json:"text"`
+		BankCardNumber string   `json:"bank_card_number"`
+	}{"bank_card_number", v.Text, v.BankCardNumber})
+}
+
+// RichTextMention is rich text mentioning a user by username.
+//
+// Since: Bot API 10.1
+type RichTextMention struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// Username is the username associated with the mention.
+	Username string
+}
+
+func (RichTextMention) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextMention) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type     string   `json:"type"`
+		Text     RichText `json:"text"`
+		Username string   `json:"username"`
+	}{"mention", v.Text, v.Username})
+}
+
+// RichTextHashtag is rich text marked as a hashtag.
+//
+// Since: Bot API 10.1
+type RichTextHashtag struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// Hashtag is the hashtag associated with the text.
+	Hashtag string
+}
+
+func (RichTextHashtag) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextHashtag) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type    string   `json:"type"`
+		Text    RichText `json:"text"`
+		Hashtag string   `json:"hashtag"`
+	}{"hashtag", v.Text, v.Hashtag})
+}
+
+// RichTextCashtag is rich text marked as a cashtag.
+//
+// Since: Bot API 10.1
+type RichTextCashtag struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// Cashtag is the cashtag associated with the text.
+	Cashtag string
+}
+
+func (RichTextCashtag) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextCashtag) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type    string   `json:"type"`
+		Text    RichText `json:"text"`
+		Cashtag string   `json:"cashtag"`
+	}{"cashtag", v.Text, v.Cashtag})
+}
+
+// RichTextBotCommand is rich text marked as a bot command.
+//
+// Since: Bot API 10.1
+type RichTextBotCommand struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// BotCommand is the bot command associated with the text.
+	BotCommand string
+}
+
+func (RichTextBotCommand) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextBotCommand) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type       string   `json:"type"`
+		Text       RichText `json:"text"`
+		BotCommand string   `json:"bot_command"`
+	}{"bot_command", v.Text, v.BotCommand})
+}
+
+// RichTextAnchorLink is rich text linking to a named anchor in the same message.
+//
+// Since: Bot API 10.1
+type RichTextAnchorLink struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// AnchorName names the anchor targeted by the link.
+	AnchorName string
+}
+
+func (RichTextAnchorLink) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextAnchorLink) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type       string   `json:"type"`
+		Text       RichText `json:"text"`
+		AnchorName string   `json:"anchor_name"`
+	}{"anchor_link", v.Text, v.AnchorName})
+}
+
+// RichTextReference is rich text marked as a named reference target.
+//
+// Since: Bot API 10.1
+type RichTextReference struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// Name is the user-facing or reference name of the value.
+	Name string
+}
+
+func (RichTextReference) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextReference) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type string   `json:"type"`
+		Text RichText `json:"text"`
+		Name string   `json:"name"`
+	}{"reference", v.Text, v.Name})
+}
+
+// RichTextReferenceLink is rich text linking to a named reference.
+//
+// Since: Bot API 10.1
+type RichTextReferenceLink struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// ReferenceName names the reference targeted by the link.
+	ReferenceName string
+}
+
+func (RichTextReferenceLink) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextReferenceLink) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type          string   `json:"type"`
+		Text          RichText `json:"text"`
+		ReferenceName string   `json:"reference_name"`
+	}{"reference_link", v.Text, v.ReferenceName})
+}
+
+// RichTextDateTime is rich text bound to a point in time with a display format.
+//
+// Since: Bot API 10.1
+type RichTextDateTime struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// UnixTime is the Unix timestamp associated with the text.
+	UnixTime int64
+	// DateTimeFormat controls how the associated Unix time is displayed.
+	DateTimeFormat string
+}
+
+func (RichTextDateTime) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextDateTime) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type           string   `json:"type"`
+		Text           RichText `json:"text"`
+		UnixTime       int64    `json:"unix_time"`
+		DateTimeFormat string   `json:"date_time_format"`
+	}{"date_time", v.Text, v.UnixTime, v.DateTimeFormat})
+}
+
+// RichTextTextMention is rich text mentioning a user without a username.
+//
+// Since: Bot API 10.1
+type RichTextTextMention struct {
+	// Text contains the formatted or plain text content.
+	Text RichText
+	// User contains the user associated with the value.
+	User User
+}
+
+func (RichTextTextMention) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextTextMention) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type string   `json:"type"`
+		Text RichText `json:"text"`
+		User User     `json:"user"`
+	}{"text_mention", v.Text, v.User})
+}
+
+// RichTextCustomEmoji is a custom emoji leaf with alternative text.
+//
+// Since: Bot API 10.1
+type RichTextCustomEmoji struct {
+	// CustomEmojiID identifies the custom emoji.
+	CustomEmojiID string
+	// AlternativeText is shown when the custom emoji can't be rendered.
+	AlternativeText string
+}
+
+func (RichTextCustomEmoji) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextCustomEmoji) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type            string `json:"type"`
+		CustomEmojiID   string `json:"custom_emoji_id"`
+		AlternativeText string `json:"alternative_text"`
+	}{"custom_emoji", v.CustomEmojiID, v.AlternativeText})
+}
+
+// RichTextMathematicalExpression is an inline mathematical expression leaf.
+//
+// Since: Bot API 10.1
+type RichTextMathematicalExpression struct {
+	// Expression contains the mathematical expression source.
+	Expression string
+}
+
+func (RichTextMathematicalExpression) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextMathematicalExpression) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type       string `json:"type"`
+		Expression string `json:"expression"`
+	}{"mathematical_expression", v.Expression})
+}
+
+// RichTextAnchor is a named anchor leaf that anchor links can point to.
+//
+// Since: Bot API 10.1
+type RichTextAnchor struct {
+	// Name is the user-facing or reference name of the value.
+	Name string
+}
+
+func (RichTextAnchor) isRichText() {}
+
+// MarshalJSON implements json.Marshaler.
+//
+// Since: Bot API 10.1
+func (v RichTextAnchor) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type string `json:"type"`
+		Name string `json:"name"`
+	}{"anchor", v.Name})
+}

tgapi/rich_text_types_test.go

@@ -0,0 +1,85 @@
+package tgapi
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func roundtripRichText(t *testing.T, in RichText) {
+	t.Helper()
+	b, err := json.Marshal(in)
+	if err != nil {
+		t.Fatalf("marshal: %v", err)
+	}
+	out, err := UnmarshalRichText(b)
+	if err != nil {
+		t.Fatalf("unmarshal %s: %v", b, err)
+	}
+	b2, err := json.Marshal(out)
+	if err != nil {
+		t.Fatalf("remarshal: %v", err)
+	}
+	if string(b) != string(b2) {
+		t.Fatalf("not stable:\n  %s\n  %s", b, b2)
+	}
+}
+
+func TestRichTextRoundtrip(t *testing.T) {
+	cases := []RichText{
+		RichTextPlain("hello"),
+		RichTextArray{RichTextPlain("a "), RichTextWrap{"bold", RichTextPlain("b")}, RichTextPlain(" c")},
+		RichTextWrap{"bold", RichTextWrap{"italic", RichTextPlain("nested")}},
+		RichTextURL{RichTextPlain("Anthropic"), "https://anthropic.com"},
+		RichTextCustomEmoji{"5368324170671202286", "👍"},
+		RichTextMathematicalExpression{"x^2 + y^2"},
+		RichTextAnchor{"chapter-1"},
+		RichTextDateTime{RichTextPlain("22:45 tomorrow"), 1647531900, "wDT"},
+		RichTextTextMention{RichTextPlain("Bob"), User{ID: 42, FirstName: "Bob"}},
+		RichTextAnchorLink{RichTextPlain("back to top"), ""},
+		RichTextReference{RichTextPlain("ref"), "note-1"},
+		// deep nesting
+		RichTextWrap{"bold", RichTextArray{
+			RichTextPlain("bold and "),
+			RichTextWrap{"italic", RichTextWrap{"underline", RichTextPlain("deep")}},
+			RichTextWrap{"spoiler", RichTextCustomEmoji{"1", "x"}},
+		}},
+	}
+	for _, c := range cases {
+		roundtripRichText(t, c)
+	}
+}
+
+func TestRichTextPlainFormsAreBare(t *testing.T) {
+	b, _ := json.Marshal(RichTextPlain("hi"))
+	if string(b) != `"hi"` {
+		t.Fatalf("string should be bare: %s", b)
+	}
+	b, _ = json.Marshal(RichTextArray{RichTextPlain("a"), RichTextPlain("b")})
+	if string(b) != `["a","b"]` {
+		t.Fatalf("array should be bare: %s", b)
+	}
+}
+
+func TestRichTextLeafHasNoText(t *testing.T) {
+	b, _ := json.Marshal(RichTextAnchor{"x"})
+	var m map[string]any
+	_ = json.Unmarshal(b, &m)
+	if _, ok := m["text"]; ok {
+		t.Fatalf("anchor must not have text field: %s", b)
+	}
+}
+
+func TestUnmarshalRichTextRejectsInvalidValues(t *testing.T) {
+	tests := []string{
+		`null`,
+		`{"type":"date_time","text":"now","unix_time":"soon"}`,
+		`{"type":"custom_emoji","custom_emoji_id":42}`,
+	}
+	for _, raw := range tests {
+		t.Run(raw, func(t *testing.T) {
+			if _, err := UnmarshalRichText([]byte(raw)); err == nil {
+				t.Fatal("expected malformed rich text to be rejected")
+			}
+		})
+	}
+}

tgapi/rich_utils.go

@@ -0,0 +1,602 @@
+package tgapi
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+)
+
+const (
+	maximumRichJSONDepth = 64
+	maximumRichJSONNodes = 10_000
+)
+
+// UnmarshalRichText parses a RichText tree from JSON: a string, an array, or
+// a typed object. Unknown object types that carry a text field are preserved
+// as RichTextWrap so their nested text remains usable; unmodeled fields are
+// discarded. The fallback representation is subject to change in v2 so unknown
+// fields can be preserved losslessly.
+//
+// Since: Bot API 10.1
+func UnmarshalRichText(data []byte) (RichText, error) {
+	if err := validateRichJSON(data); err != nil {
+		return nil, err
+	}
+	return unmarshalRichText(data)
+}
+
+func unmarshalRichText(data []byte) (RichText, error) {
+	if bytes.Equal(bytes.TrimSpace(data), []byte("null")) {
+		return nil, fmt.Errorf("richtext: null is not a rich text value")
+	}
+	// 1. string
+	var s string
+	if err := json.Unmarshal(data, &s); err == nil {
+		return RichTextPlain(s), nil
+	}
+	// 2. array
+	var raw []json.RawMessage
+	if err := json.Unmarshal(data, &raw); err == nil {
+		arr := make(RichTextArray, len(raw))
+		for i, it := range raw {
+			rt, err := unmarshalRichText(it)
+			if err != nil {
+				return nil, err
+			}
+			arr[i] = rt
+		}
+		return arr, nil
+	}
+	// 3. object -> dispatch on type, grabbing the raw text along the way
+	var head struct {
+		Type string          `json:"type"`
+		Text json.RawMessage `json:"text"`
+	}
+	if err := json.Unmarshal(data, &head); err != nil {
+		return nil, fmt.Errorf("richtext: not a string, array or object: %w", err)
+	}
+
+	// Recursively parse the nested text, if any.
+	var inner RichText
+	if len(head.Text) > 0 {
+		var err error
+		if inner, err = unmarshalRichText(head.Text); err != nil {
+			return nil, fmt.Errorf("richtext %q: bad text: %w", head.Type, err)
+		}
+	}
+
+	if richTextWrapTags[head.Type] {
+		return RichTextWrap{Tag: head.Type, Text: inner}, nil
+	}
+
+	switch head.Type {
+	case "url":
+		var v struct {
+			URL string `json:"url"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextURL{inner, v.URL}, nil
+	case "email_address":
+		var v struct {
+			V string `json:"email_address"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextEmailAddress{inner, v.V}, nil
+	case "phone_number":
+		var v struct {
+			V string `json:"phone_number"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextPhoneNumber{inner, v.V}, nil
+	case "bank_card_number":
+		var v struct {
+			V string `json:"bank_card_number"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextBankCardNumber{inner, v.V}, nil
+	case "mention":
+		var v struct {
+			V string `json:"username"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextMention{inner, v.V}, nil
+	case "hashtag":
+		var v struct {
+			V string `json:"hashtag"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextHashtag{inner, v.V}, nil
+	case "cashtag":
+		var v struct {
+			V string `json:"cashtag"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextCashtag{inner, v.V}, nil
+	case "bot_command":
+		var v struct {
+			V string `json:"bot_command"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextBotCommand{inner, v.V}, nil
+	case "anchor_link":
+		var v struct {
+			V string `json:"anchor_name"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextAnchorLink{inner, v.V}, nil
+	case "reference":
+		var v struct {
+			V string `json:"name"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextReference{inner, v.V}, nil
+	case "reference_link":
+		var v struct {
+			V string `json:"reference_name"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextReferenceLink{inner, v.V}, nil
+	case "date_time":
+		var v struct {
+			UnixTime       int64  `json:"unix_time"`
+			DateTimeFormat string `json:"date_time_format"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextDateTime{inner, v.UnixTime, v.DateTimeFormat}, nil
+	case "text_mention":
+		var v struct {
+			User User `json:"user"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextTextMention{inner, v.User}, nil
+
+	// --- leaves without text ---
+	case "custom_emoji":
+		var v struct {
+			ID  string `json:"custom_emoji_id"`
+			Alt string `json:"alternative_text"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextCustomEmoji{v.ID, v.Alt}, nil
+	case "mathematical_expression":
+		var v struct {
+			Expression string `json:"expression"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextMathematicalExpression{v.Expression}, nil
+	case "anchor":
+		var v struct {
+			Name string `json:"name"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichTextAnchor{v.Name}, nil
+
+	default:
+		// forward-compat: keep an unknown tag with a text field as
+		// RichTextWrap; without text it is an error (the shape cannot be guessed).
+		if inner != nil {
+			return RichTextWrap{Tag: head.Type, Text: inner}, nil
+		}
+		return nil, fmt.Errorf("richtext: unknown type %q", head.Type)
+	}
+}
+
+// UnmarshalRichBlock parses a single RichBlock from JSON, dispatching on the
+// type tag. Unknown types that carry a text field are decoded as RichBlockWrap
+// so their nested text remains usable; unmodeled fields are discarded. The
+// fallback representation is subject to change in v2 for lossless round trips.
+//
+// Since: Bot API 10.1
+func UnmarshalRichBlock(data []byte) (RichBlock, error) {
+	if err := validateRichJSON(data); err != nil {
+		return nil, err
+	}
+	return unmarshalRichBlock(data)
+}
+
+func unmarshalRichBlock(data []byte) (RichBlock, error) {
+	var head struct {
+		Type string          `json:"type"`
+		Text json.RawMessage `json:"text"`
+	}
+	if err := json.Unmarshal(data, &head); err != nil {
+		return nil, fmt.Errorf("richblock: %w", err)
+	}
+
+	if richBlockWrapTags[head.Type] {
+		text, err := parseOptRichText(head.Text)
+		if err != nil {
+			return nil, fmt.Errorf("richblock %q: text: %w", head.Type, err)
+		}
+		return RichBlockWrap{Tag: head.Type, Text: text}, nil
+	}
+
+	switch head.Type {
+	case "heading":
+		var v struct {
+			Size int `json:"size"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		text, err := parseOptRichText(head.Text)
+		if err != nil {
+			return nil, fmt.Errorf("richblock %q: text: %w", head.Type, err)
+		}
+		return RichBlockSectionHeading{text, v.Size}, nil
+
+	case "pre":
+		var v struct {
+			Language string `json:"language"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		text, err := parseOptRichText(head.Text)
+		if err != nil {
+			return nil, fmt.Errorf("richblock %q: text: %w", head.Type, err)
+		}
+		return RichBlockPreformatted{text, v.Language}, nil
+
+	case "blockquote":
+		var raw struct {
+			Blocks json.RawMessage `json:"blocks"`
+			Credit json.RawMessage `json:"credit"`
+		}
+		if err := json.Unmarshal(data, &raw); err != nil {
+			return nil, err
+		}
+		blocks, err := unmarshalRichBlocks(raw.Blocks)
+		if err != nil {
+			return nil, err
+		}
+		credit, err := parseOptRichText(raw.Credit)
+		if err != nil {
+			return nil, fmt.Errorf("richblock %q: credit: %w", head.Type, err)
+		}
+		return RichBlockQuotation{blocks, credit}, nil
+
+	case "pullquote":
+		var raw struct {
+			Credit json.RawMessage `json:"credit"`
+		}
+		if err := json.Unmarshal(data, &raw); err != nil {
+			return nil, err
+		}
+		text, err := parseOptRichText(head.Text)
+		if err != nil {
+			return nil, fmt.Errorf("richblock %q: text: %w", head.Type, err)
+		}
+		credit, err := parseOptRichText(raw.Credit)
+		if err != nil {
+			return nil, fmt.Errorf("richblock %q: credit: %w", head.Type, err)
+		}
+		return RichBlockPullQuotation{text, credit}, nil
+
+	case "list":
+		var v struct {
+			Items []RichBlockListItem `json:"items"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichBlockList{v.Items}, nil
+
+	case "collage":
+		var raw struct {
+			Blocks  json.RawMessage   `json:"blocks"`
+			Caption *RichBlockCaption `json:"caption"`
+		}
+		if err := json.Unmarshal(data, &raw); err != nil {
+			return nil, err
+		}
+		blocks, err := unmarshalRichBlocks(raw.Blocks)
+		if err != nil {
+			return nil, err
+		}
+		return RichBlockCollage{blocks, raw.Caption}, nil
+
+	case "slideshow":
+		var raw struct {
+			Blocks  json.RawMessage   `json:"blocks"`
+			Caption *RichBlockCaption `json:"caption"`
+		}
+		if err := json.Unmarshal(data, &raw); err != nil {
+			return nil, err
+		}
+		blocks, err := unmarshalRichBlocks(raw.Blocks)
+		if err != nil {
+			return nil, err
+		}
+		return RichBlockSlideshow{blocks, raw.Caption}, nil
+
+	case "details":
+		var raw struct {
+			Summary json.RawMessage `json:"summary"`
+			Blocks  json.RawMessage `json:"blocks"`
+			IsOpen  bool            `json:"is_open"`
+		}
+		if err := json.Unmarshal(data, &raw); err != nil {
+			return nil, err
+		}
+		summary, err := parseOptRichText(raw.Summary)
+		if err != nil {
+			return nil, fmt.Errorf("richblock %q: summary: %w", head.Type, err)
+		}
+		blocks, err := unmarshalRichBlocks(raw.Blocks)
+		if err != nil {
+			return nil, err
+		}
+		return RichBlockDetails{summary, blocks, raw.IsOpen}, nil
+
+	case "table":
+		var raw struct {
+			Cells      [][]RichBlockTableCell `json:"cells"`
+			IsBordered bool                   `json:"is_bordered"`
+			IsStriped  bool                   `json:"is_striped"`
+			Caption    json.RawMessage        `json:"caption"`
+		}
+		if err := json.Unmarshal(data, &raw); err != nil {
+			return nil, err
+		}
+		caption, err := parseOptRichText(raw.Caption)
+		if err != nil {
+			return nil, fmt.Errorf("richblock %q: caption: %w", head.Type, err)
+		}
+		return RichBlockTable{raw.Cells, raw.IsBordered, raw.IsStriped, caption}, nil
+
+	case "map":
+		var v struct {
+			Location Location          `json:"location"`
+			Zoom     int               `json:"zoom"`
+			Width    int               `json:"width"`
+			Height   int               `json:"height"`
+			Caption  *RichBlockCaption `json:"caption"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichBlockMap{v.Location, v.Zoom, v.Width, v.Height, v.Caption}, nil
+
+	case "photo":
+		var v struct {
+			Photo      []PhotoSize       `json:"photo"`
+			HasSpoiler bool              `json:"has_spoiler"`
+			Caption    *RichBlockCaption `json:"caption"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichBlockPhoto{v.Photo, v.HasSpoiler, v.Caption}, nil
+
+	case "video":
+		var v struct {
+			Video      Video             `json:"video"`
+			HasSpoiler bool              `json:"has_spoiler"`
+			Caption    *RichBlockCaption `json:"caption"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichBlockVideo{v.Video, v.HasSpoiler, v.Caption}, nil
+
+	case "audio":
+		var v struct {
+			Audio   Audio             `json:"audio"`
+			Caption *RichBlockCaption `json:"caption"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichBlockAudio{v.Audio, v.Caption}, nil
+
+	case "animation":
+		var v struct {
+			Animation  Animation         `json:"animation"`
+			HasSpoiler bool              `json:"has_spoiler"`
+			Caption    *RichBlockCaption `json:"caption"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichBlockAnimation{v.Animation, v.HasSpoiler, v.Caption}, nil
+
+	case "voice_note":
+		var v struct {
+			VoiceNote Voice             `json:"voice_note"`
+			Caption   *RichBlockCaption `json:"caption"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichBlockVoiceNote{v.VoiceNote, v.Caption}, nil
+
+	case "divider":
+		return RichBlockDivider{}, nil
+
+	case "mathematical_expression":
+		var v struct {
+			Expression string `json:"expression"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichBlockMathematicalExpression{v.Expression}, nil
+
+	case "anchor":
+		var v struct {
+			Name string `json:"name"`
+		}
+		if err := json.Unmarshal(data, &v); err != nil {
+			return nil, err
+		}
+		return RichBlockAnchor{v.Name}, nil
+
+	default:
+		// forward-compat: unknown type with text -> RichBlockWrap, without text -> error.
+		if text, err := parseOptRichText(head.Text); err == nil && text != nil {
+			return RichBlockWrap{Tag: head.Type, Text: text}, nil
+		}
+		return nil, fmt.Errorf("richblock: unknown type %q", head.Type)
+	}
+}
+
+// UnmarshalRichMessage parses a root RichMessage from JSON.
+//
+// For v1 compatibility, missing and null blocks are accepted as an empty
+// message. This permissive behavior is subject to change in v2; use
+// UnmarshalRichMessageStrict when validating untrusted input.
+//
+// Since: Bot API 10.1
+func UnmarshalRichMessage(data []byte) (RichMessage, error) {
+	if err := validateRichJSON(data); err != nil {
+		return RichMessage{}, err
+	}
+	return unmarshalRichMessage(data)
+}
+
+func unmarshalRichMessage(data []byte) (RichMessage, error) {
+	var raw struct {
+		Blocks json.RawMessage `json:"blocks"`
+		IsRTL  bool            `json:"is_rtl"`
+	}
+	if err := json.Unmarshal(data, &raw); err != nil {
+		return RichMessage{}, fmt.Errorf("richmessage: %w", err)
+	}
+	blocks, err := unmarshalRichBlocks(raw.Blocks)
+	if err != nil {
+		return RichMessage{}, err
+	}
+	return RichMessage{blocks, raw.IsRTL}, nil
+}
+
+// UnmarshalRichMessageStrict parses a RichMessage and requires a non-null blocks array.
+//
+// Since: Bot API 10.1
+func UnmarshalRichMessageStrict(data []byte) (RichMessage, error) {
+	if err := validateRichJSON(data); err != nil {
+		return RichMessage{}, err
+	}
+	var root map[string]json.RawMessage
+	if err := json.Unmarshal(data, &root); err != nil {
+		return RichMessage{}, fmt.Errorf("richmessage: %w", err)
+	}
+	blocks, ok := root["blocks"]
+	if !ok || bytes.Equal(bytes.TrimSpace(blocks), []byte("null")) {
+		return RichMessage{}, errors.New("richmessage: blocks must be a non-null array")
+	}
+	var rawBlocks []json.RawMessage
+	if err := json.Unmarshal(blocks, &rawBlocks); err != nil {
+		return RichMessage{}, errors.New("richmessage: blocks must be an array")
+	}
+	return unmarshalRichMessage(data)
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+//
+// Since: Bot API 10.1
+func (m *RichMessage) UnmarshalJSON(data []byte) error {
+	parsed, err := UnmarshalRichMessage(data)
+	if err != nil {
+		return err
+	}
+	*m = parsed
+	return nil
+}
+
+// ---------------------------------------------------------------------------
+// Internal helpers
+// ---------------------------------------------------------------------------
+
+// Optional RichText fields treat absent and null values as nil.
+func parseOptRichText(raw json.RawMessage) (RichText, error) {
+	if len(raw) == 0 || string(raw) == "null" {
+		return nil, nil
+	}
+	return unmarshalRichText(raw)
+}
+
+func unmarshalRichBlocks(raw json.RawMessage) ([]RichBlock, error) {
+	if len(raw) == 0 || string(raw) == "null" {
+		return nil, nil
+	}
+	var raws []json.RawMessage
+	if err := json.Unmarshal(raw, &raws); err != nil {
+		return nil, err
+	}
+	blocks := make([]RichBlock, len(raws))
+	for i, r := range raws {
+		b, err := unmarshalRichBlock(r)
+		if err != nil {
+			return nil, err
+		}
+		blocks[i] = b
+	}
+	return blocks, nil
+}
+
+func validateRichJSON(data []byte) error {
+	decoder := json.NewDecoder(bytes.NewReader(data))
+	depth := 0
+	nodes := 0
+	for {
+		token, err := decoder.Token()
+		if errors.Is(err, io.EOF) {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		nodes++
+		if nodes > maximumRichJSONNodes {
+			return fmt.Errorf("%w: maximum %d", ErrRichJSONNodes, maximumRichJSONNodes)
+		}
+		delim, ok := token.(json.Delim)
+		if !ok {
+			continue
+		}
+		switch delim {
+		case '{', '[':
+			depth++
+			if depth > maximumRichJSONDepth {
+				return fmt.Errorf("%w: maximum %d", ErrRichJSONDepth, maximumRichJSONDepth)
+			}
+		case '}', ']':
+			depth--
+		}
+	}
+}

tgapi/rich_utils_test.go

@@ -0,0 +1,294 @@
+package tgapi
+
+import (
+	"encoding/json"
+	"errors"
+	"strings"
+	"testing"
+)
+
+func roundtripRichBlock(t *testing.T, in RichBlock) {
+	t.Helper()
+	b, err := json.Marshal(in)
+	if err != nil {
+		t.Fatalf("marshal: %v", err)
+	}
+	out, err := UnmarshalRichBlock(b)
+	if err != nil {
+		t.Fatalf("unmarshal %s: %v", b, err)
+	}
+	b2, err := json.Marshal(out)
+	if err != nil {
+		t.Fatalf("remarshal: %v", err)
+	}
+	if string(b) != string(b2) {
+		t.Fatalf("not stable:\n  %s\n  %s", b, b2)
+	}
+}
+
+func par(s string) RichBlockWrap { return RichBlockWrap{"paragraph", RichTextPlain(s)} }
+
+func TestRichBlockRoundtrip(t *testing.T) {
+	cases := []RichBlock{
+		// wrap blocks
+		par("Hello, world"),
+		RichBlockWrap{"footer", RichTextPlain("© 2024")},
+		RichBlockWrap{"thinking", RichTextPlain("Let me reason step by step.")},
+
+		// heading
+		RichBlockSectionHeading{RichTextWrap{"bold", RichTextPlain("Chapter 1")}, 1},
+		RichBlockSectionHeading{RichTextPlain("smallest"), 6},
+
+		// preformatted
+		RichBlockPreformatted{RichTextPlain(`fmt.Println("hi")`), "go"},
+		RichBlockPreformatted{Text: RichTextPlain("no language")},
+
+		// quotations
+		RichBlockQuotation{[]RichBlock{par("To be or not to be")}, RichTextPlain("Shakespeare")},
+		RichBlockQuotation{Blocks: []RichBlock{par("anonymous"), par("second block")}},
+		RichBlockPullQuotation{Text: RichTextPlain("Pull me")},
+		RichBlockPullQuotation{RichTextPlain("Wisdom"), RichTextWrap{"italic", RichTextPlain("someone")}},
+
+		// list: label is the ready-made marker, numbering lives on the items
+		RichBlockList{
+			Items: []RichBlockListItem{
+				{Label: "c.", Blocks: []RichBlock{par("item 3")}, Value: 3, Type: "a"},
+				{Label: "vii.", Blocks: []RichBlock{par("item 7")}, Value: 7, Type: "i"},
+			},
+		},
+		RichBlockList{
+			Items: []RichBlockListItem{
+				{Label: "•", Blocks: []RichBlock{par("todo")}, HasCheckbox: true},
+				{Label: "•", Blocks: []RichBlock{par("done")}, HasCheckbox: true, IsChecked: true},
+			},
+		},
+
+		// collage and slideshow
+		RichBlockCollage{
+			Blocks:  []RichBlock{RichBlockPhoto{Photo: []PhotoSize{{FileID: "abc123", Width: 100, Height: 100}}}},
+			Caption: &RichBlockCaption{Text: RichTextPlain("A photo")},
+		},
+		RichBlockSlideshow{
+			Blocks: []RichBlock{
+				RichBlockVideo{Video: Video{FileID: "vid1", Width: 640, Height: 480, Duration: 10}},
+			},
+		},
+
+		// details
+		RichBlockDetails{
+			Summary: RichTextPlain("Spoiler"),
+			Blocks:  []RichBlock{par("Hidden content")},
+		},
+		RichBlockDetails{
+			Summary: RichTextWrap{"bold", RichTextPlain("Open details")},
+			Blocks:  []RichBlock{RichBlockDivider{}, par("content")},
+			IsOpen:  true,
+		},
+
+		// table: text cells, headers, spans, alignment, invisible cell
+		RichBlockTable{
+			Cells: [][]RichBlockTableCell{
+				{
+					{Text: RichTextPlain("Name"), IsHeader: true, Align: "center"},
+					{Text: RichTextPlain("Score"), IsHeader: true, VAlign: "middle"},
+				},
+				{
+					{Text: RichTextPlain("Alice"), ColSpan: 2},
+				},
+				{
+					{}, // invisible cell
+					{Text: RichTextPlain("42"), RowSpan: 2},
+				},
+			},
+			IsBordered: true,
+			Caption:    RichTextPlain("Results"),
+		},
+
+		// map
+		RichBlockMap{
+			Location: Location{Latitude: 55.7558, Longitude: 37.6173},
+			Zoom:     13, Width: 800, Height: 400,
+			Caption: &RichBlockCaption{Text: RichTextPlain("Moscow"), Credit: RichTextPlain("OpenStreetMap")},
+		},
+
+		// media
+		RichBlockPhoto{
+			Photo:      []PhotoSize{{FileID: "p1", Width: 1280, Height: 720}},
+			HasSpoiler: true,
+			Caption:    &RichBlockCaption{Text: RichTextPlain("A cat"), Credit: RichTextWrap{"italic", RichTextPlain("photographer")}},
+		},
+		RichBlockVideo{Video: Video{FileID: "v1", Width: 1920, Height: 1080, Duration: 30}, HasSpoiler: true},
+		RichBlockAudio{
+			Audio:   Audio{FileID: "a1", Duration: 60},
+			Caption: &RichBlockCaption{Text: RichTextPlain("Podcast ep. 1")},
+		},
+		RichBlockAnimation{Animation: Animation{FileID: "g1", Width: 320, Height: 240, Duration: 2}},
+		RichBlockVoiceNote{VoiceNote: Voice{FileID: "vn1", Duration: 5}},
+
+		// leaves
+		RichBlockDivider{},
+		RichBlockMathematicalExpression{Expression: "E = mc^2"},
+		RichBlockAnchor{Name: "section-2"},
+	}
+	for _, c := range cases {
+		roundtripRichBlock(t, c)
+	}
+}
+
+func TestRichMessageRoundtrip(t *testing.T) {
+	for _, msg := range []RichMessage{
+		{
+			Blocks: []RichBlock{
+				RichBlockSectionHeading{RichTextPlain("Title"), 1},
+				RichBlockWrap{"paragraph", RichTextArray{RichTextPlain("Some "), RichTextWrap{"bold", RichTextPlain("bold")}, RichTextPlain(" text")}},
+				RichBlockDivider{},
+				RichBlockList{
+					Items: []RichBlockListItem{
+						{Label: "1.", Blocks: []RichBlock{par("First")}, Value: 1, Type: "1"},
+						{Label: "2.", Blocks: []RichBlock{par("Second")}, Value: 2, Type: "1"},
+					},
+				},
+				RichBlockPhoto{
+					Photo:   []PhotoSize{{FileID: "img1", Width: 10, Height: 10}},
+					Caption: &RichBlockCaption{Text: RichTextPlain("Fig. 1")},
+				},
+			},
+		},
+		{
+			Blocks: []RichBlock{par("שלום")},
+			IsRTL:  true,
+		},
+	} {
+		b, err := json.Marshal(msg)
+		if err != nil {
+			t.Fatalf("marshal: %v", err)
+		}
+		var out RichMessage
+		if err := json.Unmarshal(b, &out); err != nil {
+			t.Fatalf("unmarshal: %v", err)
+		}
+		b2, err := json.Marshal(out)
+		if err != nil {
+			t.Fatalf("remarshal: %v", err)
+		}
+		if string(b) != string(b2) {
+			t.Fatalf("not stable:\n  %s\n  %s", b, b2)
+		}
+	}
+}
+
+func TestRichBlockTags(t *testing.T) {
+	// tags per spec: heading, pre, blockquote, pullquote
+	cases := map[string]RichBlock{
+		"heading":    RichBlockSectionHeading{RichTextPlain("h"), 2},
+		"pre":        RichBlockPreformatted{Text: RichTextPlain("x")},
+		"blockquote": RichBlockQuotation{Blocks: []RichBlock{par("q")}},
+		"pullquote":  RichBlockPullQuotation{Text: RichTextPlain("p")},
+	}
+	for want, block := range cases {
+		b, _ := json.Marshal(block)
+		var m map[string]any
+		_ = json.Unmarshal(b, &m)
+		if m["type"] != want {
+			t.Fatalf("expected type %q, got %s", want, b)
+		}
+	}
+}
+
+func TestRichBlockOptionalFieldsOmitted(t *testing.T) {
+	// nil credit/caption and false flags must not appear in the JSON
+	for _, c := range []struct {
+		block RichBlock
+		bad   []string
+	}{
+		{RichBlockQuotation{Blocks: []RichBlock{par("q")}}, []string{"credit"}},
+		{RichBlockPullQuotation{Text: RichTextPlain("p")}, []string{"credit"}},
+		{RichBlockPhoto{Photo: []PhotoSize{{FileID: "p"}}}, []string{"caption", "has_spoiler"}},
+		{RichBlockTable{Cells: [][]RichBlockTableCell{}}, []string{"caption", "is_bordered", "is_striped"}},
+		{RichBlockDetails{Summary: RichTextPlain("s")}, []string{"is_open"}},
+	} {
+		b, _ := json.Marshal(c.block)
+		for _, key := range c.bad {
+			if strings.Contains(string(b), `"`+key+`"`) {
+				t.Fatalf("%T: %q must be omitted: %s", c.block, key, b)
+			}
+		}
+	}
+	// same for RichMessage.is_rtl
+	b, _ := json.Marshal(RichMessage{Blocks: []RichBlock{par("x")}})
+	if strings.Contains(string(b), "is_rtl") {
+		t.Fatalf("is_rtl must be omitted: %s", b)
+	}
+}
+
+func TestRichBlockDividerHasNoContent(t *testing.T) {
+	b, _ := json.Marshal(RichBlockDivider{})
+	var m map[string]any
+	_ = json.Unmarshal(b, &m)
+	if len(m) != 1 {
+		t.Fatalf("divider must only have type field: %s", b)
+	}
+	if m["type"] != "divider" {
+		t.Fatalf("unexpected type: %s", b)
+	}
+}
+
+func TestRichBlockUnknownTypeWithTextIsForwardCompat(t *testing.T) {
+	raw := []byte(`{"type":"future_tag","text":"hello"}`)
+	b, err := UnmarshalRichBlock(raw)
+	if err != nil {
+		t.Fatalf("forward-compat failed: %v", err)
+	}
+	w, ok := b.(RichBlockWrap)
+	if !ok || w.Tag != "future_tag" {
+		t.Fatalf("expected RichBlockWrap{future_tag}, got %T", b)
+	}
+}
+
+func TestRichBlockUnknownTypeWithoutTextIsError(t *testing.T) {
+	raw := []byte(`{"type":"mystery_leaf","value":42}`)
+	_, err := UnmarshalRichBlock(raw)
+	if err == nil {
+		t.Fatal("expected error for unknown type without text")
+	}
+}
+
+func TestUnmarshalRichBlockRejectsMalformedFields(t *testing.T) {
+	tests := []string{
+		`{"type":"heading","size":"large","text":"hello"}`,
+		`{"type":"blockquote","blocks":[],"credit":{"type":"date_time","text":"now","unix_time":"soon"}}`,
+		`{"type":"table","cells":[],"caption":{"type":"date_time","text":"now","unix_time":"soon"}}`,
+	}
+	for _, raw := range tests {
+		t.Run(raw, func(t *testing.T) {
+			if _, err := UnmarshalRichBlock([]byte(raw)); err == nil {
+				t.Fatal("expected malformed rich block to be rejected")
+			}
+		})
+	}
+}
+
+func TestUnmarshalRichMessageStrict(t *testing.T) {
+	for _, raw := range []string{`null`, `{}`, `{"blocks":null}`, `{"blocks":{}}`} {
+		t.Run(raw, func(t *testing.T) {
+			if _, err := UnmarshalRichMessageStrict([]byte(raw)); err == nil {
+				t.Fatal("expected strict decoder error")
+			}
+		})
+	}
+	if _, err := UnmarshalRichMessageStrict([]byte(`{"blocks":[]}`)); err != nil {
+		t.Fatalf("strict decoder rejected an empty blocks array: %v", err)
+	}
+}
+
+func TestRichJSONStructuralLimits(t *testing.T) {
+	deep := strings.Repeat("[", maximumRichJSONDepth+1) + `"x"` + strings.Repeat("]", maximumRichJSONDepth+1)
+	if _, err := UnmarshalRichText([]byte(deep)); !errors.Is(err, ErrRichJSONDepth) {
+		t.Fatalf("expected ErrRichJSONDepth, got %v", err)
+	}
+
+	wide := "[" + strings.Repeat("0,", maximumRichJSONNodes) + "0]"
+	if _, err := UnmarshalRichText([]byte(wide)); !errors.Is(err, ErrRichJSONNodes) {
+		t.Fatalf("expected ErrRichJSONNodes, got %v", err)
+	}
+}

tgapi/stars_methods.go

@@ -6,8 +6,11 @@ import "context"
 // Since: Bot API 7.5
 // See https://core.telegram.org/bots/api#getstartransactions
 type GetStarTransactions struct {
+	// Offset Optional. Number of transactions to skip in the response
 	Offset int `json:"offset,omitempty"`
-	Limit  int `json:"limit,omitempty"`
+	// Limit Optional. The maximum number of transactions to be retrieved. Values between 1-100 are accepted.
+	// Defaults to 100.
+	Limit int `json:"limit,omitempty"`
 }
 
 // GetMyStarBalance returns the bot's Telegram Star balance.
@@ -48,7 +51,9 @@ func (api *API) GetStarTransactionsWithContext(ctx context.Context, params GetSt
 // Since: Bot API 7.4
 // See https://core.telegram.org/bots/api#refundstarpayment
 type RefundStarPayment struct {
-	UserID                  int64  `json:"user_id"`
+	// UserID Required. Identifier of the user whose payment will be refunded
+	UserID int64 `json:"user_id"`
+	// TelegramPaymentChargeID Required. Telegram payment identifier
 	TelegramPaymentChargeID string `json:"telegram_payment_charge_id"`
 }
 
@@ -74,9 +79,14 @@ func (api *API) RefundStarPaymentWithContext(ctx context.Context, params RefundS
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#edituserstarsubscription
 type EditUserStarSubscription struct {
-	UserID                  int64  `json:"user_id"`
+	// UserID Required. Identifier of the user whose subscription will be edited
+	UserID int64 `json:"user_id"`
+	// TelegramPaymentChargeID Required. Telegram payment identifier for the subscription
 	TelegramPaymentChargeID string `json:"telegram_payment_charge_id"`
-	IsCanceled              bool   `json:"is_canceled"`
+	// IsCanceled Required. Pass True to cancel extension of the user subscription; the subscription must be
+	// active up to the end of the current subscription period. Pass False to allow the user to re-enable a
+	// subscription that was previously canceled by the bot.
+	IsCanceled bool `json:"is_canceled"`
 }
 
 // EditUserStarSubscription cancels or re-enables a user star subscription extension.

tgapi/stars_types.go

@@ -4,17 +4,29 @@ package tgapi
 // Since: Bot API 7.5
 // See https://core.telegram.org/bots/api#startransaction
 type StarTransaction struct {
-	ID             string         `json:"id"`
-	Amount         int            `json:"amount"`
-	NanostarAmount int            `json:"nanostar_amount,omitempty"`
-	Date           int            `json:"date"`
-	Source         map[string]any `json:"source,omitempty"`
-	Receiver       map[string]any `json:"receiver,omitempty"`
+	// ID Unique identifier of the transaction. Coincides with the identifier of the original transaction for
+	// refund transactions. Coincides with SuccessfulPayment.telegram_payment_charge_id for successful incoming
+	// payments from users.
+	ID string `json:"id"`
+	// Amount Integer amount of Telegram Stars transferred by the transaction
+	Amount int `json:"amount"`
+	// NanostarAmount Optional. The number of 1/1000000000 shares of Telegram Stars transferred by the
+	// transaction; from 0 to 999999999
+	NanostarAmount int `json:"nanostar_amount,omitempty"`
+	// Date Date the transaction was created in Unix time
+	Date int `json:"date"`
+	// Source Optional. Source of an incoming transaction (e.g., a user purchasing goods or services, Fragment
+	// refunding a failed withdrawal). Only for incoming transactions.
+	Source map[string]any `json:"source,omitempty"`
+	// Receiver Optional. Receiver of an outgoing transaction (e.g., a user for a purchase refund, Fragment for
+	// a withdrawal). Only for outgoing transactions.
+	Receiver map[string]any `json:"receiver,omitempty"`
 }
 
 // StarTransactions contains a list of Telegram Star transactions.
 // Since: Bot API 7.5
 // See https://core.telegram.org/bots/api#startransactions
 type StarTransactions struct {
+	// Transactions The list of transactions
 	Transactions []StarTransaction `json:"transactions"`
 }

tgapi/stickers_methods.go

@@ -6,21 +6,52 @@ import "context"
 // Since: Bot API 1.3
 // See https://core.telegram.org/bots/api#sendsticker
 type SendSticker struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
-	Sticker             string `json:"sticker"`
-	Emoji               string `json:"emoji,omitempty"`
-	DisableNotification bool   `json:"disable_notification,omitempty"`
-	ProtectContent      bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast  bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID     string `json:"message_effect_id,omitempty"`
+	// Sticker Required. Sticker to send. Pass a file_id as String to send a file that exists on the Telegram
+	// servers (recommended), pass an HTTP URL as a String for Telegram to get a .WEBP sticker from the
+	// Internet, or upload a new .WEBP, .TGS, or .WEBM sticker using multipart/form-data. More information on
+	// Sending Files ». Video and animated stickers can't be sent via an HTTP URL.
+	Sticker string `json:"sticker"`
+	// Emoji Optional. Emoji associated with the sticker; only for just uploaded stickers
+	Emoji string `json:"emoji,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendSticker sends a static .WEBP, animated .TGS, or video .WEBM sticker.
@@ -44,6 +75,7 @@ func (api *API) SendStickerWithContext(ctx context.Context, params SendSticker)
 // Since: Bot API 3.2
 // See https://core.telegram.org/bots/api#getstickerset
 type GetStickerSet struct {
+	// Name Required. Name of the sticker set
 	Name string `json:"name"`
 }
 
@@ -68,6 +100,8 @@ func (api *API) GetStickerSetWithContext(ctx context.Context, params GetStickerS
 // Since: Bot API 6.2
 // See https://core.telegram.org/bots/api#getcustomemojistickers
 type GetCustomEmojiStickers struct {
+	// CustomEmojiIDs Required. A JSON-serialized list of custom emoji identifiers. At most 200 custom emoji
+	// identifiers can be specified.
 	CustomEmojiIDs []string `json:"custom_emoji_ids"`
 }
 
@@ -92,7 +126,9 @@ func (api *API) GetCustomEmojiStickersWithContext(ctx context.Context, params Ge
 // Since: Bot API 3.2
 // See https://core.telegram.org/bots/api#uploadstickerfile
 type UploadStickerFile struct {
-	UserID        int64              `json:"user_id"`
+	// UserID Required. User identifier of sticker file owner
+	UserID int64 `json:"user_id"`
+	// StickerFormat Required. Format of the sticker, must be one of “static”, “animated”, “video”
 	StickerFormat InputStickerFormat `json:"sticker_format"`
 }
 
@@ -126,13 +162,24 @@ func (api *API) UploadStickerFileWithContext(ctx context.Context, params UploadS
 // Since: Bot API 3.2
 // See https://core.telegram.org/bots/api#createnewstickerset
 type CreateNewStickerSet struct {
-	UserID int64  `json:"user_id"`
-	Name   string `json:"name"`
-	Title  string `json:"title"`
+	// UserID Required. User identifier of created sticker set owner
+	UserID int64 `json:"user_id"`
+	// Name Required. Short name of sticker set, to be used in t.me/addstickers/ URLs (e.g., animals). Can
+	// contain only English letters, digits and underscores. Must begin with a letter, can't contain consecutive
+	// underscores and must end in "_by_<bot_username>". <bot_username> is case insensitive. 1-64 characters.
+	Name string `json:"name"`
+	// Title Required. Sticker set title, 1-64 characters
+	Title string `json:"title"`
 
-	Stickers        []InputSticker `json:"stickers"`
-	StickerType     StickerType    `json:"sticker_type,omitempty"`
-	NeedsRepainting bool           `json:"needs_repainting,omitempty"`
+	// Stickers Required. A JSON-serialized list of 1-50 initial stickers to be added to the sticker set
+	Stickers []InputSticker `json:"stickers"`
+	// StickerType Optional. Type of stickers in the set, pass “regular”, “mask”, or “custom_emoji”.
+	// By default, a regular sticker set is created.
+	StickerType StickerType `json:"sticker_type,omitempty"`
+	// NeedsRepainting Optional. Pass True if stickers in the sticker set must be repainted to the color of text
+	// when used in messages, the accent color if used as emoji status, white on chat photos, or another
+	// appropriate color based on context; for custom emoji sticker sets only
+	NeedsRepainting bool `json:"needs_repainting,omitempty"`
 }
 
 // CreateNewStickerSet creates a new sticker set owned by a user.
@@ -157,8 +204,12 @@ func (api *API) CreateNewStickerSetWithContext(ctx context.Context, params Creat
 // Since: Bot API 3.2
 // See https://core.telegram.org/bots/api#addstickertoset
 type AddStickerToSet struct {
-	UserID  int64        `json:"user_id"`
-	Name    string       `json:"name"`
+	// UserID Required. User identifier of sticker set owner
+	UserID int64 `json:"user_id"`
+	// Name Required. Sticker set name
+	Name string `json:"name"`
+	// Sticker Required. A JSON-serialized object with information about the added sticker. If exactly the same
+	// sticker had already been added to the set, then the set isn't changed.
 	Sticker InputSticker `json:"sticker"`
 }
 
@@ -184,8 +235,10 @@ func (api *API) AddStickerToSetWithContext(ctx context.Context, params AddSticke
 // Since: Bot API 3.2
 // See https://core.telegram.org/bots/api#setstickerpositioninset
 type SetStickerPositionInSet struct {
-	Sticker  string `json:"sticker"`
-	Position int    `json:"position"`
+	// Sticker Required. File identifier of the sticker
+	Sticker string `json:"sticker"`
+	// Position Required. New sticker position in the set, zero-based
+	Position int `json:"position"`
 }
 
 // SetStickerPositionInSet moves a sticker in a set to a specific position.
@@ -210,6 +263,7 @@ func (api *API) SetStickerPositionInSetWithContext(ctx context.Context, params S
 // Since: Bot API 3.2
 // See https://core.telegram.org/bots/api#deletestickerfromset
 type DeleteStickerFromSet struct {
+	// Sticker Required. File identifier of the sticker
 	Sticker string `json:"sticker"`
 }
 
@@ -235,10 +289,15 @@ func (api *API) DeleteStickerFromSetWithContext(ctx context.Context, params Dele
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#replacestickerinset
 type ReplaceStickerInSet struct {
-	UserID     int64        `json:"user_id"`
-	Name       string       `json:"name"`
-	OldSticker string       `json:"old_sticker"`
-	Sticker    InputSticker `json:"sticker"`
+	// UserID Required. User identifier of the sticker set owner
+	UserID int64 `json:"user_id"`
+	// Name Required. Sticker set name
+	Name string `json:"name"`
+	// OldSticker Required. File identifier of the replaced sticker
+	OldSticker string `json:"old_sticker"`
+	// Sticker Required. A JSON-serialized object with information about the added sticker. If exactly the same
+	// sticker had already been added to the set, then the set remains unchanged.
+	Sticker InputSticker `json:"sticker"`
 }
 
 // ReplaceStickerInSet replaces an existing sticker in a set with a new one.
@@ -263,7 +322,9 @@ func (api *API) ReplaceStickerInSetWithContext(ctx context.Context, params Repla
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#setstickeremojilist
 type SetStickerEmojiList struct {
-	Sticker   string   `json:"sticker"`
+	// Sticker Required. File identifier of the sticker
+	Sticker string `json:"sticker"`
+	// EmojiList Required. A JSON-serialized list of 1-20 emoji associated with the sticker
 	EmojiList []string `json:"emoji_list"`
 }
 
@@ -289,7 +350,10 @@ func (api *API) SetStickerEmojiListWithContext(ctx context.Context, params SetSt
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#setstickerkeywords
 type SetStickerKeywords struct {
-	Sticker  string   `json:"sticker"`
+	// Sticker Required. File identifier of the sticker
+	Sticker string `json:"sticker"`
+	// Keywords Optional. A JSON-serialized list of 0-20 search keywords for the sticker with total length of up
+	// to 64 characters
 	Keywords []string `json:"keywords"`
 }
 
@@ -315,7 +379,10 @@ func (api *API) SetStickerKeywordsWithContext(ctx context.Context, params SetSti
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#setstickermaskposition
 type SetStickerMaskPosition struct {
-	Sticker      string        `json:"sticker"`
+	// Sticker Required. File identifier of the sticker
+	Sticker string `json:"sticker"`
+	// MaskPosition Optional. A JSON-serialized object with the position where the mask should be placed on
+	// faces. Omit the parameter to remove the mask position.
 	MaskPosition *MaskPosition `json:"mask_position,omitempty"`
 }
 
@@ -341,7 +408,9 @@ func (api *API) SetStickerMaskPositionWithContext(ctx context.Context, params Se
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#setstickersettitle
 type SetStickerSetTitle struct {
-	Name  string `json:"name"`
+	// Name Required. Sticker set name
+	Name string `json:"name"`
+	// Title Required. Sticker set title, 1-64 characters
 	Title string `json:"title"`
 }
 
@@ -367,10 +436,23 @@ func (api *API) SetStickerSetTitleWithContext(ctx context.Context, params SetSti
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#setstickersetthumbnail
 type SetStickerSetThumbnail struct {
-	Name      string             `json:"name"`
-	UserID    int64              `json:"user_id"`
-	Thumbnail string             `json:"thumbnail"`
-	Format    InputStickerFormat `json:"format"`
+	// Name Required. Sticker set name
+	Name string `json:"name"`
+	// UserID Required. User identifier of the sticker set owner
+	UserID int64 `json:"user_id"`
+	// Thumbnail Optional. A .WEBP or .PNG image with the thumbnail, must be up to 128 kilobytes in size and
+	// have a width and height of exactly 100px, or a .TGS animation with a thumbnail up to 32 kilobytes in size
+	// (see https://core.telegram.org/stickers#animation-requirements for animated sticker technical
+	// requirements), or a .WEBM video with the thumbnail up to 32 kilobytes in size; see
+	// https://core.telegram.org/stickers#video-requirements for video sticker technical requirements. Pass a
+	// file_id as a String to send a file that already exists on the Telegram servers, pass an HTTP URL as a
+	// String for Telegram to get a file from the Internet, or upload a new one using multipart/form-data. More
+	// information on Sending Files ». Animated and video sticker set thumbnails can't be uploaded via HTTP
+	// URL. If omitted, then the thumbnail is dropped and the first sticker is used as the thumbnail.
+	Thumbnail string `json:"thumbnail"`
+	// Format Required. Format of the thumbnail, must be one of “static” for a .WEBP or .PNG image,
+	// “animated” for a .TGS animation, or “video” for a .WEBM video
+	Format InputStickerFormat `json:"format"`
 }
 
 // SetStickerSetThumbnail sets the thumbnail of a sticker set.
@@ -395,7 +477,10 @@ func (api *API) SetStickerSetThumbnailWithContext(ctx context.Context, params Se
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#setcustomemojistickersetthumbnail
 type SetCustomEmojiStickerSetThumbnail struct {
-	Name          string `json:"name"`
+	// Name Required. Sticker set name
+	Name string `json:"name"`
+	// CustomEmojiID Optional. Custom emoji identifier of a sticker from the sticker set; pass an empty string
+	// to drop the thumbnail and use the first sticker as the thumbnail
 	CustomEmojiID string `json:"custom_emoji_id,omitempty"`
 }
 
@@ -421,6 +506,7 @@ func (api *API) SetCustomEmojiStickerSetThumbnailWithContext(ctx context.Context
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#deletestickerset
 type DeleteStickerSet struct {
+	// Name Required. Sticker set name
 	Name string `json:"name"`
 }
 

tgapi/stickers_types.go

@@ -18,10 +18,17 @@ const (
 // Since: Bot API 3.2
 // See https://core.telegram.org/bots/api#maskposition
 type MaskPosition struct {
-	Point  MaskPositionPoint `json:"point"`
-	XShift float32           `json:"x_shift"`
-	YShift float32           `json:"y_shift"`
-	Scale  float32           `json:"scale"`
+	// Point The part of the face relative to which the mask should be placed. One of “forehead”,
+	// “eyes”, “mouth”, or “chin”.
+	Point MaskPositionPoint `json:"point"`
+	// XShift Shift by X-axis measured in widths of the mask scaled to the face size, from left to right. For
+	// example, choosing -1.0 will place mask just to the left of the default mask position.
+	XShift float32 `json:"x_shift"`
+	// YShift Shift by Y-axis measured in heights of the mask scaled to the face size, from top to bottom. For
+	// example, 1.0 will place the mask just below the default mask position.
+	YShift float32 `json:"y_shift"`
+	// Scale Mask scaling coefficient. For example, 2.0 means double size.
+	Scale float32 `json:"scale"`
 }
 
 // StickerType represents the type of a sticker.
@@ -40,32 +47,53 @@ const (
 // Since: Bot API 1.0
 // See https://core.telegram.org/bots/api#sticker
 type Sticker struct {
-	FileID       string `json:"file_id"`
+	// FileID Identifier for this file, which can be used to download or reuse the file
+	FileID string `json:"file_id"`
+	// FileUniqueID Unique identifier for this file, which is supposed to be the same over time and for
+	// different bots. Can't be used to download or reuse the file.
 	FileUniqueID string `json:"file_unique_id"`
-	Width        int    `json:"width"`
-	Height       int    `json:"height"`
+	// Width Sticker width
+	Width int `json:"width"`
+	// Height Sticker height
+	Height int `json:"height"`
 
-	Type           StickerType   `json:"type"`                // Since: Bot API 6.2
-	IsAnimated     bool          `json:"is_animated"`         // Since: Bot API 4.4
-	IsVideo        bool          `json:"is_video"`            // Since: Bot API 5.7
-	Thumbnail      *PhotoSize    `json:"thumbnail,omitempty"` // Since: Bot API 6.6
-	Emoji          *string       `json:"emoji,omitempty"`
-	SetName        *string       `json:"set_name,omitempty"`        // Since: Bot API 3.2
-	MaskPosition   *MaskPosition `json:"mask_position,omitempty"`   // Since: Bot API 3.2
-	CustomEmojiID  *string       `json:"custom_emoji_id,omitempty"` // Since: Bot API 6.2
-	NeedRepainting *bool         `json:"need_repainting,omitempty"` // Since: Bot API 6.6
-	FileSize       *int64        `json:"file_size,omitempty"`
+	// Type Type of the sticker, currently one of “regular”, “mask”, “custom_emoji”. The type of the
+	// sticker is independent from its format, which is determined by the fields is_animated and is_video.
+	Type StickerType `json:"type"` // Since: Bot API 6.2
+	// IsAnimated True, if the sticker is animated
+	IsAnimated bool `json:"is_animated"` // Since: Bot API 4.4
+	// IsVideo True, if the sticker is a video sticker
+	IsVideo bool `json:"is_video"` // Since: Bot API 5.7
+	// Thumbnail Optional. Sticker thumbnail in the .WEBP or .JPG format
+	Thumbnail *PhotoSize `json:"thumbnail,omitempty"` // Since: Bot API 6.6
+	// Emoji Optional. Emoji associated with the sticker
+	Emoji *string `json:"emoji,omitempty"`
+	// SetName Optional. Name of the sticker set to which the sticker belongs
+	SetName *string `json:"set_name,omitempty"` // Since: Bot API 3.2
+	// MaskPosition Optional. For mask stickers, the position where the mask should be placed
+	MaskPosition *MaskPosition `json:"mask_position,omitempty"` // Since: Bot API 3.2
+	// CustomEmojiID Optional. For custom emoji stickers, unique identifier of the custom emoji
+	CustomEmojiID *string `json:"custom_emoji_id,omitempty"` // Since: Bot API 6.2
+	// NeedRepainting reports whether Telegram must recolor the custom emoji sticker.
+	NeedRepainting *bool `json:"need_repainting,omitempty"` // Since: Bot API 6.6
+	// FileSize Optional. File size in bytes
+	FileSize *int64 `json:"file_size,omitempty"`
 }
 
 // StickerSet represents a sticker set.
 // Since: Bot API 3.2
 // See https://core.telegram.org/bots/api#stickerset
 type StickerSet struct {
-	Name        string      `json:"name"`
-	Title       string      `json:"title"`
+	// Name Sticker set name
+	Name string `json:"name"`
+	// Title Sticker set title
+	Title string `json:"title"`
+	// StickerType Type of stickers in the set, currently one of “regular”, “mask”, “custom_emoji”
 	StickerType StickerType `json:"sticker_type"`
-	Stickers    []Sticker   `json:"stickers"`
-	Thumbnail   *PhotoSize  `json:"thumbnail,omitempty"`
+	// Stickers List of all set stickers
+	Stickers []Sticker `json:"stickers"`
+	// Thumbnail Optional. Sticker set thumbnail in the .WEBP, .TGS, or .WEBM format
+	Thumbnail *PhotoSize `json:"thumbnail,omitempty"`
 }
 
 // InputStickerFormat represents the format of an input sticker.
@@ -84,9 +112,19 @@ const (
 // Since: Bot API 6.6
 // See https://core.telegram.org/bots/api#inputsticker
 type InputSticker struct {
-	Sticker      string             `json:"sticker"`
-	Format       InputStickerFormat `json:"format"`
-	EmojiList    []string           `json:"emoji_list"`
-	MaskPosition *MaskPosition      `json:"mask_position,omitempty"`
-	Keywords     []string           `json:"keywords,omitempty"`
+	// Sticker The added sticker. Pass a file_id as a String to send a file that already exists on the Telegram
+	// servers, pass an HTTP URL as a String for Telegram to get a file from the Internet, or pass
+	// “attach://<file_attach_name>” to upload a new file using multipart/form-data under <file_attach_name>
+	// name. Animated and video stickers can't be uploaded via HTTP URL. More information on Sending Files »
+	Sticker string `json:"sticker"`
+	// Format Format of the added sticker, must be one of “static” for a .WEBP or .PNG image, “animated”
+	// for a .TGS animation, “video” for a .WEBM video
+	Format InputStickerFormat `json:"format"`
+	// EmojiList List of 1-20 emoji associated with the sticker
+	EmojiList []string `json:"emoji_list"`
+	// MaskPosition Optional. Position where the mask should be placed on faces. For “mask” stickers only.
+	MaskPosition *MaskPosition `json:"mask_position,omitempty"`
+	// Keywords Optional. List of 0-20 search keywords for the sticker with total length of up to 64 characters.
+	// For “regular” and “custom_emoji” stickers only.
+	Keywords []string `json:"keywords,omitempty"`
 }

tgapi/types_test.go

@@ -72,6 +72,18 @@ func TestUpdateUnmarshalSetsType(t *testing.T) {
 			}`,
 			want: UpdateTypeManagedBot,
 		},
+		{
+			name: "subscription",
+			body: `{
+				"update_id": 6,
+				"subscription": {
+					"user": {"id": 13, "is_bot": false, "first_name": "Subscriber"},
+					"invoice_payload": "monthly",
+					"state": "active"
+				}
+			}`,
+			want: UpdateTypeSubscription,
+		},
 	}
 
 	for _, tt := range tests {
@@ -89,6 +101,9 @@ func TestUpdateUnmarshalSetsType(t *testing.T) {
 			if tt.want == UpdateTypeManagedBot && update.ManagedBot.Bot.ID != 12 {
 				t.Fatalf("unexpected managed bot id: got %d want %d", update.ManagedBot.Bot.ID, 12)
 			}
+			if tt.want == UpdateTypeSubscription && update.Subscription.User.ID != 13 {
+				t.Fatalf("unexpected subscription user id: got %d want %d", update.Subscription.User.ID, 13)
+			}
 		})
 	}
 }

tgapi/uploader_api.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"context"
 	"fmt"
+	"io"
 	"mime/multipart"
 	"net/http"
 	"path/filepath"
@@ -61,6 +62,15 @@ func (f UploaderFile) SetType(t UploaderFileType) UploaderFile {
 	return f
 }
 
+// SetAttachName sets the multipart field name used by an attach:// reference.
+// The name must match the suffix of the corresponding InputMedia.Media value.
+//
+// Since: Bot API 10.2
+func (f UploaderFile) SetAttachName(name string) UploaderFile {
+	f.field = UploaderFileType(name)
+	return f
+}
+
 // Uploader is a Telegram Bot API client specialized for multipart file uploads.
 //
 // Use Uploader methods when you need to upload binary files directly
@@ -124,6 +134,7 @@ func (r UploaderRequest[R, P]) doRequest(ctx context.Context, up *Uploader) (R,
 	}
 	url := fmt.Sprintf("%s/bot%s%s/%s", up.api.apiURL, up.api.token, methodPrefix, r.method)
 
+	retries := 0
 	for {
 		if up.api.Limiter != nil {
 			if err := up.api.Limiter.Check(ctx, up.api.dropOverflowLimit, r.chatID); err != nil {
@@ -131,23 +142,21 @@ func (r UploaderRequest[R, P]) doRequest(ctx context.Context, up *Uploader) (R,
 			}
 		}
 
-		buf, contentType, err := prepareMultipart(r.files, r.params)
+		requestBody, contentType := prepareMultipartStream(r.files, r.params)
+		req, err := http.NewRequestWithContext(ctx, "POST", url, requestBody)
 		if err != nil {
-			return zero, err
-		}
-		req, err := http.NewRequestWithContext(ctx, "POST", url, buf)
-		if err != nil {
-			return zero, err
+			_ = requestBody.Close()
+			return zero, fmt.Errorf("failed to create upload request: %w", err)
 		}
 		req.Header.Set("Content-Type", contentType)
 		req.Header.Set("Accept", "application/json")
 		req.Header.Set("User-Agent", fmt.Sprintf("Laniakea/%s", utils.VersionString))
-		req.ContentLength = int64(buf.Len())
 
 		up.logger.Debugln("UPLOADER REQ", url)
 		resp, err := up.api.client.Do(req)
+		_ = requestBody.Close()
 		if err != nil {
-			return zero, err
+			return zero, fmt.Errorf("HTTP upload request failed: %w", redactHTTPError(err, up.api.token))
 		}
 
 		body, err := readBody(resp.Body)
@@ -155,7 +164,7 @@ func (r UploaderRequest[R, P]) doRequest(ctx context.Context, up *Uploader) (R,
 		if err != nil {
 			return zero, err
 		}
-		up.logger.Debugln("UPLOADER RES", url, string(body))
+		up.logger.Debugln("UPLOADER RES", responseLogSummary(r.method, len(body)))
 
 		response, err := parseBody[R](body)
 		if err != nil {
@@ -163,29 +172,34 @@ func (r UploaderRequest[R, P]) doRequest(ctx context.Context, up *Uploader) (R,
 		}
 
 		if !response.Ok {
+			responseErr := &ResponseError{
+				Code:        response.ErrorCode,
+				Description: response.Description,
+				Parameters:  response.Parameters,
+			}
 			if response.ErrorCode == 429 && response.Parameters != nil && response.Parameters.RetryAfter != nil {
 				after := *response.Parameters.RetryAfter
 				up.logger.Warnf("Rate limited, retry after %d seconds (chat: %d)", after, r.chatID)
 				if up.api.Limiter != nil {
-					if r.chatID > 0 {
+					if r.chatID != 0 {
 						up.api.Limiter.SetChatLock(r.chatID, after)
 					} else {
 						up.api.Limiter.SetGlobalLock(after)
 					}
 				}
+				if retries >= up.api.maxRetries {
+					return zero, fmt.Errorf("%w after %d retries: %w", ErrRetryLimit, retries, responseErr)
+				}
+				retries++
 
 				select {
 				case <-ctx.Done():
 					return zero, ctx.Err()
-				case <-time.After(time.Duration(after) * time.Second):
+				case <-time.After(retryDelay(after)):
 					continue
 				}
 			}
-			return zero, &ResponseError{
-				Code:        response.ErrorCode,
-				Description: response.Description,
-				Parameters:  response.Parameters,
-			}
+			return zero, responseErr
 		}
 		return response.Result, nil
 	}
@@ -223,36 +237,39 @@ func (r UploaderRequest[R, P]) Do(up *Uploader) (R, error) {
 	return r.DoWithContext(context.Background(), up)
 }
 
-func prepareMultipart[P any](files []UploaderFile, params P) (*bytes.Buffer, string, error) {
-	buf := bytes.NewBuffer(nil)
-	w := multipart.NewWriter(buf)
+func prepareMultipartStream[P any](files []UploaderFile, params P) (io.ReadCloser, string) {
+	reader, writer := io.Pipe()
+	multipartWriter := multipart.NewWriter(writer)
+	contentType := multipartWriter.FormDataContentType()
+	go func() {
+		err := writeMultipart(multipartWriter, files, params)
+		_ = writer.CloseWithError(err)
+	}()
+	return reader, contentType
+}
 
+func writeMultipart[P any](w *multipart.Writer, files []UploaderFile, params P) error {
 	for _, file := range files {
 		fw, err := w.CreateFormFile(string(file.field), file.filename)
 		if err != nil {
 			_ = w.Close()
-			return nil, "", err
+			return err
 		}
 
-		_, err = fw.Write(file.data)
+		_, err = io.Copy(fw, bytes.NewReader(file.data))
 		if err != nil {
 			_ = w.Close()
-			return nil, "", err
+			return err
 		}
 	}
 
 	err := utils.Encode(w, params)
 	if err != nil {
 		_ = w.Close()
-		return nil, "", err
+		return err
 	}
 
-	err = w.Close()
-	if err != nil {
-		return nil, "", err
-	}
-
-	return buf, w.FormDataContentType(), nil
+	return w.Close()
 }
 
 func uploaderTypeByExt(filename string) UploaderFileType {

tgapi/uploader_api_test.go

@@ -1,6 +1,7 @@
 package tgapi
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"io"
@@ -105,6 +106,17 @@ func TestUploaderEncodesJSONFieldsAndLeavesAcceptEncodingToHTTPTransport(t *test
 	}
 }
 
+func TestUploaderRejectsDirectRichMessageDraftUpload(t *testing.T) {
+	uploader := &Uploader{}
+	_, err := uploader.SendRichMessageDraft(
+		SendRichMessageDraft{ChatID: 42, DraftID: 1},
+		NewUploaderFile("photo.jpg", []byte("photo")),
+	)
+	if !errors.Is(err, ErrRichMessageDraftUploadUnsupported) {
+		t.Fatalf("expected ErrRichMessageDraftUploadUnsupported, got %v", err)
+	}
+}
+
 func TestUploaderSurfacesResponseErrorForTelegramFailure(t *testing.T) {
 	const responseBody = `{"ok":false,"error_code":400,"description":"Bad Request: chat not found"}`
 
@@ -177,6 +189,176 @@ func TestNewUploaderFileDetectsFileTypeCaseInsensitively(t *testing.T) {
 	}
 }
 
+func TestUploaderSendLivePhotoUsesRequiredMultipartFields(t *testing.T) {
+	tests := []struct {
+		name string
+		send func(*Uploader) (Message, error)
+	}{
+		{
+			name: "background context",
+			send: func(uploader *Uploader) (Message, error) {
+				return uploader.SendLivePhoto(
+					UploadLivePhoto{ChatID: 42},
+					NewUploaderFile("live.mp4", []byte("video")),
+					NewUploaderFile("photo.jpg", []byte("image")),
+				)
+			},
+		},
+		{
+			name: "explicit context",
+			send: func(uploader *Uploader) (Message, error) {
+				return uploader.SendLivePhotoWithContext(
+					context.Background(),
+					UploadLivePhoto{ChatID: 42},
+					NewUploaderFile("live.mp4", []byte("video")),
+					NewUploaderFile("photo.jpg", []byte("image")),
+				)
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var (
+				gotPath  string
+				gotFiles map[string]multipartFile
+				parseErr error
+			)
+			client := &http.Client{
+				Transport: roundTripFunc(func(req *http.Request) (*http.Response, error) {
+					gotPath = req.URL.Path
+					gotFiles, parseErr = readMultipartFiles(req)
+					return &http.Response{
+						StatusCode: http.StatusOK,
+						Header:     http.Header{"Content-Type": []string{"application/json"}},
+						Body:       io.NopCloser(strings.NewReader(`{"ok":true,"result":{"message_id":5,"date":1}}`)),
+					}, nil
+				}),
+			}
+			api := NewAPI(
+				NewAPIOpts("token").
+					SetAPIURL("https://example.test").
+					SetHTTPClient(client),
+			)
+			defer func() {
+				if err := api.Close(); err != nil {
+					t.Errorf("Close API returned error: %v", err)
+				}
+			}()
+			uploader := NewUploader(api)
+			defer func() {
+				if err := uploader.Close(); err != nil {
+					t.Errorf("Close uploader returned error: %v", err)
+				}
+			}()
+
+			if _, err := tt.send(uploader); err != nil {
+				t.Fatalf("SendLivePhoto returned error: %v", err)
+			}
+			if parseErr != nil {
+				t.Fatalf("multipart parse failed: %v", parseErr)
+			}
+			if gotPath != "/bottoken/sendLivePhoto" {
+				t.Fatalf("unexpected request path: %q", gotPath)
+			}
+			assertMultipartFile(t, gotFiles, "live_photo", "live.mp4", "video")
+			assertMultipartFile(t, gotFiles, "photo", "photo.jpg", "image")
+		})
+	}
+}
+
+func TestPrepareMultipartRichMessageUsesAttachName(t *testing.T) {
+	params := SendRichMessage{
+		ChatID: 42,
+		RichMessage: InputRichMessage{Blocks: []InputRichBlock{
+			InputRichBlockAnimation{
+				Type:      InputRichTypeAnimation,
+				Animation: InputMedia{Type: InputMediaTypeAnimation, Media: "attach://animation"},
+			},
+		}},
+	}
+
+	body, contentType := prepareMultipartStream(
+		[]UploaderFile{NewUploaderFile("animation.mp4", []byte("animation")).SetAttachName("animation")},
+		params,
+	)
+	defer func() { _ = body.Close() }()
+
+	_, contentTypeParams, err := mime.ParseMediaType(contentType)
+	if err != nil {
+		t.Fatalf("ParseMediaType returned error: %v", err)
+	}
+	reader := multipart.NewReader(body, contentTypeParams["boundary"])
+
+	parts := make(map[string]string)
+	var fileData []byte
+	for {
+		part, err := reader.NextPart()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			t.Fatalf("NextPart returned error: %v", err)
+		}
+		data, err := io.ReadAll(part)
+		if err != nil {
+			t.Fatalf("ReadAll returned error: %v", err)
+		}
+		if part.FileName() != "" {
+			if part.FormName() != "animation" {
+				t.Errorf("file form name = %q, want animation", part.FormName())
+			}
+			fileData = data
+			continue
+		}
+		parts[part.FormName()] = string(data)
+	}
+
+	if string(fileData) != "animation" {
+		t.Errorf("file data = %q, want animation", fileData)
+	}
+	if got := parts["rich_message"]; !strings.Contains(got, `"media":"attach://animation"`) {
+		t.Errorf("rich_message = %s, want attach reference", got)
+	}
+}
+
+func TestUploaderStopsAfterConfiguredRetryLimit(t *testing.T) {
+	calls := 0
+	client := &http.Client{Transport: roundTripFunc(func(req *http.Request) (*http.Response, error) {
+		_, _ = io.Copy(io.Discard, req.Body)
+		calls++
+		return &http.Response{
+			StatusCode: http.StatusOK,
+			Body: io.NopCloser(strings.NewReader(
+				`{"ok":false,"error_code":429,"description":"retry","parameters":{"retry_after":0}}`,
+			)),
+		}, nil
+	})}
+
+	api := NewAPI(NewAPIOpts("token").
+		SetAPIURL("https://example.test").
+		SetHTTPClient(client).
+		SetMaxRetries(1))
+	defer func() { _ = api.Close() }()
+	uploader := NewUploader(api)
+	defer func() { _ = uploader.Close() }()
+
+	_, err := uploader.SendPhoto(
+		UploadPhoto{ChatID: 42},
+		NewUploaderFile("photo.jpg", []byte("img")),
+	)
+	if !errors.Is(err, ErrRetryLimit) {
+		t.Fatalf("expected ErrRetryLimit, got %v", err)
+	}
+	var responseErr *ResponseError
+	if !errors.As(err, &responseErr) || responseErr.Code != http.StatusTooManyRequests {
+		t.Fatalf("expected wrapped 429 ResponseError, got %v", err)
+	}
+	if calls != 2 {
+		t.Fatalf("request count = %d, want 2", calls)
+	}
+}
+
 func readMultipartRequest(req *http.Request) (map[string]string, string, []byte, error) {
 	_, params, err := mime.ParseMediaType(req.Header.Get("Content-Type"))
 	if err != nil {
@@ -209,3 +391,48 @@ func readMultipartRequest(req *http.Request) (map[string]string, string, []byte,
 		fields[part.FormName()] = string(data)
 	}
 }
+
+type multipartFile struct {
+	name string
+	data string
+}
+
+func readMultipartFiles(req *http.Request) (map[string]multipartFile, error) {
+	_, params, err := mime.ParseMediaType(req.Header.Get("Content-Type"))
+	if err != nil {
+		return nil, err
+	}
+	reader := multipart.NewReader(req.Body, params["boundary"])
+	files := make(map[string]multipartFile)
+	for {
+		part, err := reader.NextPart()
+		if err == io.EOF {
+			return files, nil
+		}
+		if err != nil {
+			return nil, err
+		}
+		if part.FileName() == "" {
+			continue
+		}
+		data, err := io.ReadAll(part)
+		if err != nil {
+			return nil, err
+		}
+		files[part.FormName()] = multipartFile{name: part.FileName(), data: string(data)}
+	}
+}
+
+func assertMultipartFile(t *testing.T, files map[string]multipartFile, field, name, data string) {
+	t.Helper()
+	file, ok := files[field]
+	if !ok {
+		t.Fatalf("multipart field %q is missing", field)
+	}
+	if file.name != name {
+		t.Errorf("multipart field %q filename = %q, want %q", field, file.name, name)
+	}
+	if file.data != data {
+		t.Errorf("multipart field %q data = %q, want %q", field, file.data, data)
+	}
+}

tgapi/uploader_methods.go

@@ -2,29 +2,102 @@ package tgapi
 
 import "context"
 
+// SendRichMessage uploads files referenced by attach:// names in params.RichMessage
+// and sends the rich message.
+//
+// Since: Bot API 10.2
+func (u *Uploader) SendRichMessage(params SendRichMessage, files ...UploaderFile) (Message, error) {
+	req := NewUploaderRequestWithChatID[Message]("sendRichMessage", params, params.ChatID, files...)
+	return req.Do(u)
+}
+
+// SendRichMessageWithContext uploads files referenced by attach:// names in params.RichMessage
+// and sends the rich message using ctx for cancellation and deadlines.
+//
+// Since: Bot API 10.2
+func (u *Uploader) SendRichMessageWithContext(ctx context.Context, params SendRichMessage, files ...UploaderFile) (Message, error) {
+	req := NewUploaderRequestWithChatID[Message]("sendRichMessage", params, params.ChatID, files...)
+	return req.DoWithContext(ctx, u)
+}
+
+// SendRichMessageDraft streams a rich-message draft without direct file uploads.
+// It returns ErrRichMessageDraftUploadUnsupported when files is non-empty.
+//
+// Since: Bot API 10.2
+func (u *Uploader) SendRichMessageDraft(params SendRichMessageDraft, files ...UploaderFile) (bool, error) {
+	if len(files) > 0 {
+		return false, ErrRichMessageDraftUploadUnsupported
+	}
+	return u.api.SendRichMessageDraft(params)
+}
+
+// SendRichMessageDraftWithContext is the context-aware variant of SendRichMessageDraft.
+//
+// Since: Bot API 10.2
+func (u *Uploader) SendRichMessageDraftWithContext(ctx context.Context, params SendRichMessageDraft, files ...UploaderFile) (bool, error) {
+	if len(files) > 0 {
+		return false, ErrRichMessageDraftUploadUnsupported
+	}
+	return u.api.SendRichMessageDraftWithContext(ctx, params)
+}
+
 // UploadPhoto holds parameters for uploading a photo using the Uploader.
 // Since: Bot API 1.0
 // See https://core.telegram.org/bots/api#sendphoto
 type UploadPhoto struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// Caption Optional. Photo caption (may also be used when resending photos by file_id), 0-1024 characters
+	// after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the photo caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
 
-	ShowCaptionAboveMedia bool   `json:"show_caption_above_media,omitempty"`
-	HasSpoiler            bool   `json:"has_spoiler,omitempty"`
-	DisableNotification   bool   `json:"disable_notification,omitempty"`
-	ProtectContent        bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast    bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID       string `json:"message_effect_id,omitempty"`
+	// ShowCaptionAboveMedia Optional. Pass True if the caption must be shown above the message media
+	ShowCaptionAboveMedia bool `json:"show_caption_above_media,omitempty"`
+	// HasSpoiler Optional. Pass True if the photo needs to be covered with a spoiler animation
+	HasSpoiler bool `json:"has_spoiler,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendPhoto uploads a photo via multipart and sends it as a message.
@@ -49,27 +122,61 @@ func (u *Uploader) SendPhotoWithContext(ctx context.Context, params UploadPhoto,
 // Since: Bot API 1.2
 // See https://core.telegram.org/bots/api#sendaudio
 type UploadAudio struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// Caption Optional. Audio caption, 0-1024 characters after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the audio caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
 
-	Duration  int    `json:"duration,omitempty"`
+	// Duration Optional. Duration of the audio in seconds
+	Duration int `json:"duration,omitempty"`
+	// Performer Optional. Performer
 	Performer string `json:"performer,omitempty"`
-	Title     string `json:"title,omitempty"`
+	// Title Optional. Track name
+	Title string `json:"title,omitempty"`
 
-	DisableNotification bool   `json:"disable_notification,omitempty"`
-	ProtectContent      bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast  bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID     string `json:"message_effect_id,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendAudio uploads an audio file via multipart and sends it as a message.
@@ -94,24 +201,58 @@ func (u *Uploader) SendAudioWithContext(ctx context.Context, params UploadAudio,
 // Since: Bot API 1.0
 // See https://core.telegram.org/bots/api#senddocument
 type UploadDocument struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// Caption Optional. Document caption (may also be used when resending documents by file_id), 0-1024
+	// characters after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the document caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
 
-	DisableContentTypeDetection bool   `json:"disable_content_type_detection,omitempty"`
-	DisableNotification         bool   `json:"disable_notification,omitempty"`
-	ProtectContent              bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast          bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID             string `json:"message_effect_id,omitempty"`
+	// DisableContentTypeDetection Optional. Disables automatic server-side content type detection for files
+	// uploaded using multipart/form-data
+	DisableContentTypeDetection bool `json:"disable_content_type_detection,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendDocument uploads a document via multipart and sends it as a message.
@@ -136,31 +277,70 @@ func (u *Uploader) SendDocumentWithContext(ctx context.Context, params UploadDoc
 // Since: Bot API 1.0
 // See https://core.telegram.org/bots/api#sendvideo
 type UploadVideo struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
+	// Duration Optional. Duration of sent video in seconds
 	Duration int `json:"duration,omitempty"`
-	Width    int `json:"width,omitempty"`
-	Height   int `json:"height,omitempty"`
+	// Width Optional. Video width
+	Width int `json:"width,omitempty"`
+	// Height Optional. Video height
+	Height int `json:"height,omitempty"`
 
-	StartTimestamp  int64           `json:"start_timestamp,omitempty"`
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// StartTimestamp Optional. Start timestamp for the video in the message
+	StartTimestamp int64 `json:"start_timestamp,omitempty"`
+	// Caption Optional. Video caption (may also be used when resending videos by file_id), 0-1024 characters
+	// after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the video caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
 
-	ShowCaptionAboveMedia bool   `json:"show_caption_above_media,omitempty"`
-	HasSpoiler            bool   `json:"has_spoiler,omitempty"`
-	SupportsStreaming     bool   `json:"supports_streaming,omitempty"`
-	DisableNotification   bool   `json:"disable_notification,omitempty"`
-	ProtectContent        bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast    bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID       string `json:"message_effect_id,omitempty"`
+	// ShowCaptionAboveMedia Optional. Pass True if the caption must be shown above the message media
+	ShowCaptionAboveMedia bool `json:"show_caption_above_media,omitempty"`
+	// HasSpoiler Optional. Pass True if the video needs to be covered with a spoiler animation
+	HasSpoiler bool `json:"has_spoiler,omitempty"`
+	// SupportsStreaming Optional. Pass True if the uploaded video is suitable for streaming
+	SupportsStreaming bool `json:"supports_streaming,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendVideo uploads a video via multipart and sends it as a message.
@@ -185,29 +365,66 @@ func (u *Uploader) SendVideoWithContext(ctx context.Context, params UploadVideo,
 // Since: Bot API 4.0
 // See https://core.telegram.org/bots/api#sendanimation
 type UploadAnimation struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
+	// Duration Optional. Duration of sent animation in seconds
 	Duration int `json:"duration,omitempty"`
-	Width    int `json:"width,omitempty"`
-	Height   int `json:"height,omitempty"`
+	// Width Optional. Animation width
+	Width int `json:"width,omitempty"`
+	// Height Optional. Animation height
+	Height int `json:"height,omitempty"`
 
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// Caption Optional. Animation caption (may also be used when resending animation by file_id), 0-1024
+	// characters after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the animation caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
 
-	ShowCaptionAboveMedia bool   `json:"show_caption_above_media,omitempty"`
-	HasSpoiler            bool   `json:"has_spoiler,omitempty"`
-	DisableNotification   bool   `json:"disable_notification,omitempty"`
-	ProtectContent        bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast    bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID       string `json:"message_effect_id,omitempty"`
+	// ShowCaptionAboveMedia Optional. Pass True if the caption must be shown above the message media
+	ShowCaptionAboveMedia bool `json:"show_caption_above_media,omitempty"`
+	// HasSpoiler Optional. Pass True if the animation needs to be covered with a spoiler animation
+	HasSpoiler bool `json:"has_spoiler,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendAnimation uploads an animation via multipart and sends it as a message.
@@ -232,24 +449,56 @@ func (u *Uploader) SendAnimationWithContext(ctx context.Context, params UploadAn
 // Since: Bot API 1.2
 // See https://core.telegram.org/bots/api#sendvoice
 type UploadVoice struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// Caption Optional. Voice message caption, 0-1024 characters after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the voice message caption. See formatting options for
+	// more details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
-	Duration        int             `json:"duration,omitempty"`
+	// Duration Optional. Duration of the voice message in seconds
+	Duration int `json:"duration,omitempty"`
 
-	DisableNotification bool   `json:"disable_notification,omitempty"`
-	ProtectContent      bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast  bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID     string `json:"message_effect_id,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendVoice uploads a voice note via multipart and sends it as a message.
@@ -274,22 +523,50 @@ func (u *Uploader) SendVoiceWithContext(ctx context.Context, params UploadVoice,
 // Since: Bot API 3.0
 // See https://core.telegram.org/bots/api#sendvideonote
 type UploadVideoNote struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target bot, supergroup or
+	// channel in the format @username
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
 
+	// Duration Optional. Duration of sent video in seconds
 	Duration int `json:"duration,omitempty"`
-	Length   int `json:"length,omitempty"`
+	// Length Optional. Video width and height, i.e. diameter of the video message
+	Length int `json:"length,omitempty"`
 
-	DisableNotification bool   `json:"disable_notification,omitempty"`
-	ProtectContent      bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast  bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID     string `json:"message_effect_id,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
 // SendVideoNote uploads a video note via multipart and sends it as a message.
@@ -314,6 +591,8 @@ func (u *Uploader) SendVideoNoteWithContext(ctx context.Context, params UploadVi
 // Since: Bot API 3.1
 // See https://core.telegram.org/bots/api#setchatphoto
 type UploadChatPhoto struct {
+	// ChatID Required. Unique identifier for the target chat or username of the target channel in the format
+	// @username
 	ChatID int64 `json:"chat_id"`
 }
 
@@ -340,12 +619,29 @@ func (u *Uploader) SetChatPhotoWithContext(ctx context.Context, params UploadCha
 // Use this type when uploading a self-signed certificate file.
 // See https://core.telegram.org/bots/api#setwebhook
 type UploadSetWebhook struct {
-	URL                string       `json:"url"`
-	IPAddress          string       `json:"ip_address,omitempty"`
-	MaxConnections     int8         `json:"max_connections,omitempty"`
-	AllowedUpdates     []UpdateType `json:"allowed_updates,omitempty"`
-	DropPendingUpdates bool         `json:"drop_pending_updates,omitempty"`
-	SecretToken        string       `json:"secret_token,omitempty"`
+	// URL Required. HTTPS URL to send updates to. Use an empty string to remove webhook integration.
+	URL string `json:"url"`
+	// IPAddress Optional. The fixed IP address which will be used to send webhook requests instead of the IP
+	// address resolved through DNS
+	IPAddress string `json:"ip_address,omitempty"`
+	// MaxConnections Optional. The maximum allowed number of simultaneous HTTPS connections to the webhook for
+	// update delivery, 1-100. Defaults to 40. Use lower values to limit the load on your bot's server, and
+	// higher values to increase your bot's throughput.
+	MaxConnections int8 `json:"max_connections,omitempty"`
+	// AllowedUpdates Optional. A JSON-serialized list of the update types you want your bot to receive. For
+	// example, specify ["message", "edited_channel_post", "callback_query"] to only receive updates of these
+	// types. See Update for a complete list of available update types. Specify an empty list to receive all
+	// update types except chat_member, message_reaction, and message_reaction_count (default). If not
+	// specified, the previous setting will be used. Please note that this parameter doesn't affect updates
+	// created before the call to the setWebhook, so unwanted updates may be received for a short period of
+	// time.
+	AllowedUpdates []UpdateType `json:"allowed_updates,omitempty"`
+	// DropPendingUpdates Optional. Pass True to drop all pending updates
+	DropPendingUpdates bool `json:"drop_pending_updates,omitempty"`
+	// SecretToken Optional. A secret token to be sent in a header “X-Telegram-Bot-Api-Secret-Token” in
+	// every webhook request, 1-256 characters. Only characters A-Z, a-z, 0-9, _ and - are allowed. The header
+	// is useful to ensure that the request comes from a webhook set by you.
+	SecretToken string `json:"secret_token,omitempty"`
 }
 
 // SetWebhook uploads a certificate and sets a webhook URL.
@@ -370,41 +666,85 @@ func (u *Uploader) SetWebhookWithContext(ctx context.Context, params UploadSetWe
 // Since: Bot API 10.0
 // See https://core.telegram.org/bots/api#sendlivephoto
 type UploadLivePhoto struct {
-	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int64  `json:"chat_id"`
-	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	// BusinessConnectionID Optional. Unique identifier of the business connection on behalf of which the
+	// message will be sent
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	// ChatID Required. Unique identifier for the target chat or username of the target channel (in the format
+	// @channelusername)
+	ChatID int64 `json:"chat_id"`
+	// MessageThreadID Optional. Unique identifier for the target message thread (topic) of a forum; for forum
+	// supergroups and private chats of bots with forum topic mode enabled only
+	MessageThreadID int `json:"message_thread_id,omitempty"`
+	// DirectMessagesTopicID Optional. Identifier of the direct messages topic to which the message will be
+	// sent; required if the message is sent to a direct messages chat
+	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
 
-	Caption         string          `json:"caption,omitempty"`
-	ParseMode       ParseMode       `json:"parse_mode,omitempty"`
+	// ReceiverUserID identifies the user who can see the ephemeral message.
+	ReceiverUserID int64 `json:"receiver_user_id,omitempty"` // Since: Bot API 10.2
+	// CallbackQueryID identifies the callback query that triggered an ephemeral response.
+	CallbackQueryID string `json:"callback_query_id,omitempty"` // Since: Bot API 10.2
+	// Caption Optional. Video caption (may also be used when resending videos by file_id), 0-1024 characters
+	// after entities parsing
+	Caption string `json:"caption,omitempty"`
+	// ParseMode Optional. Mode for parsing entities in the video caption. See formatting options for more
+	// details.
+	ParseMode ParseMode `json:"parse_mode,omitempty"`
+	// CaptionEntities Optional. A JSON-serialized list of special entities that appear in the caption, which
+	// can be specified instead of parse_mode
 	CaptionEntities []MessageEntity `json:"caption_entities,omitempty"`
 
-	ShowCaptionAboveMedia bool   `json:"show_caption_above_media,omitempty"`
-	HasSpoiler            bool   `json:"has_spoiler,omitempty"`
-	DisableNotification   bool   `json:"disable_notification,omitempty"`
-	ProtectContent        bool   `json:"protect_content,omitempty"`
-	AllowPaidBroadcast    bool   `json:"allow_paid_broadcast,omitempty"`
-	MessageEffectID       string `json:"message_effect_id,omitempty"`
+	// ShowCaptionAboveMedia Optional. Pass True if the caption must be shown above the message media
+	ShowCaptionAboveMedia bool `json:"show_caption_above_media,omitempty"`
+	// HasSpoiler Optional. Pass True if the video needs to be covered with a spoiler animation
+	HasSpoiler bool `json:"has_spoiler,omitempty"`
+	// DisableNotification Optional. Sends the message silently. Users will receive a notification with no
+	// sound.
+	DisableNotification bool `json:"disable_notification,omitempty"`
+	// ProtectContent Optional. Protects the contents of the sent message from forwarding and saving
+	ProtectContent bool `json:"protect_content,omitempty"`
+	// AllowPaidBroadcast Optional. Pass True to allow up to 1000 messages per second, ignoring broadcasting
+	// limits for a fee of 0.1 Telegram Stars per message. The relevant Stars will be withdrawn from the bot's
+	// balance.
+	AllowPaidBroadcast bool `json:"allow_paid_broadcast,omitempty"`
+	// MessageEffectID Optional. Unique identifier of the message effect to be added to the message; for private
+	// chats only
+	MessageEffectID string `json:"message_effect_id,omitempty"`
 
+	// SuggestedPostParameters Optional. A JSON-serialized object containing the parameters of the suggested
+	// post to send; for direct messages chats only. If the message is sent as a reply to another suggested
+	// post, then that suggested post is automatically declined.
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
-	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
-	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
+	// ReplyParameters Optional. Description of the message to reply to
+	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`
+	// ReplyMarkup Optional. Additional interface options. A JSON-serialized object for an inline keyboard,
+	// custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user.
+	ReplyMarkup *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
-// SendLivePhoto uploads a live photo via multipart and sends it as a message.
+// SendLivePhoto uploads a live-photo video and its static image via multipart.
+// livePhoto is sent in the live_photo field and photo in the photo field.
 // Since: Bot API 10.0
-// file is the live photo file to upload.
 // See https://core.telegram.org/bots/api#sendlivephoto
-func (u *Uploader) SendLivePhoto(params UploadLivePhoto, file UploaderFile) (Message, error) {
-	req := NewUploaderRequestWithChatID[Message]("sendLivePhoto", params, params.ChatID, file.SetType(UploaderLivePhotoType))
+func (u *Uploader) SendLivePhoto(params UploadLivePhoto, livePhoto, photo UploaderFile) (Message, error) {
+	req := NewUploaderRequestWithChatID[Message](
+		"sendLivePhoto", params, params.ChatID,
+		livePhoto.SetType(UploaderLivePhotoType),
+		photo.SetType(UploaderPhotoType),
+	)
 	return req.Do(u)
 }
 
-// SendLivePhotoWithContext is the context-aware variant of SendLivePhoto.
+// SendLivePhotoWithContext uploads a live-photo video and its static image via
+// multipart using ctx for cancellation and deadlines.
 // Since: Bot API 10.0
-// It executes the same request but uses ctx for cancellation and deadlines.
 // See https://core.telegram.org/bots/api#sendlivephoto
-func (u *Uploader) SendLivePhotoWithContext(ctx context.Context, params UploadLivePhoto, file UploaderFile) (Message, error) {
-	req := NewUploaderRequestWithChatID[Message]("sendLivePhoto", params, params.ChatID, file.SetType(UploaderLivePhotoType))
+func (u *Uploader) SendLivePhotoWithContext(
+	ctx context.Context, params UploadLivePhoto, livePhoto, photo UploaderFile,
+) (Message, error) {
+	req := NewUploaderRequestWithChatID[Message](
+		"sendLivePhoto", params, params.ChatID,
+		livePhoto.SetType(UploaderLivePhotoType),
+		photo.SetType(UploaderPhotoType),
+	)
 	return req.DoWithContext(ctx, u)
 }

tgapi/users_methods.go

@@ -6,9 +6,14 @@ import "context"
 // Since: Bot API 1.4
 // See https://core.telegram.org/bots/api#getuserprofilephotos
 type GetUserProfilePhotos struct {
+	// UserID Required. Unique identifier of the target user
 	UserID int64 `json:"user_id"`
-	Offset int   `json:"offset,omitempty"`
-	Limit  int   `json:"limit,omitempty"`
+	// Offset Optional. Sequential number of the first photo to be returned. By default, all photos are
+	// returned.
+	Offset int `json:"offset,omitempty"`
+	// Limit Optional. Limits the number of photos to be retrieved. Values between 1-100 are accepted. Defaults
+	// to 100.
+	Limit int `json:"limit,omitempty"`
 }
 
 // GetUserProfilePhotos returns a list of profile pictures for a user.
@@ -32,9 +37,14 @@ func (api *API) GetUserProfilePhotosWithContext(ctx context.Context, params GetU
 // Since: Bot API 9.3
 // See https://core.telegram.org/bots/api#getuserprofileaudios
 type GetUserProfileAudios struct {
+	// UserID Required. Unique identifier of the target user
 	UserID int64 `json:"user_id"`
-	Offset int   `json:"offset,omitempty"`
-	Limit  int   `json:"limit,omitempty"`
+	// Offset Optional. Sequential number of the first audio to be returned. By default, all audios are
+	// returned.
+	Offset int `json:"offset,omitempty"`
+	// Limit Optional. Limits the number of audios to be retrieved. Values between 1-100 are accepted. Defaults
+	// to 100.
+	Limit int `json:"limit,omitempty"`
 }
 
 // GetUserProfileAudios returns a list of profile audios for a user.
@@ -58,9 +68,13 @@ func (api *API) GetUserProfileAudiosWithContext(ctx context.Context, params GetU
 // Since: Bot API 8.0
 // See https://core.telegram.org/bots/api#setuseremojistatus
 type SetUserEmojiStatus struct {
-	UserID         int64  `json:"user_id"`
-	EmojiID        string `json:"emoji_status_custom_emoji_id,omitempty"`
-	ExpirationDate int    `json:"emoji_status_expiration_date,omitempty"`
+	// UserID Required. Unique identifier of the target user
+	UserID int64 `json:"user_id"`
+	// EmojiID Optional. Custom emoji identifier of the emoji status to set. Pass an empty string to remove the
+	// status.
+	EmojiID string `json:"emoji_status_custom_emoji_id,omitempty"`
+	// ExpirationDate Optional. Expiration date of the emoji status, if any
+	ExpirationDate int `json:"emoji_status_expiration_date,omitempty"`
 }
 
 // SetUserEmojiStatus sets a custom emoji status for a user.
@@ -85,15 +99,29 @@ func (api *API) SetUserEmojiStatusWithContext(ctx context.Context, params SetUse
 // Since: Bot API 9.3
 // See https://core.telegram.org/bots/api#getusergifts
 type GetUserGifts struct {
-	UserID                      int64  `json:"user_id"`
-	ExcludeUnlimited            bool   `json:"exclude_unlimited,omitempty"`
-	ExcludeLimitedUpgradable    bool   `json:"exclude_limited_upgradable,omitempty"`
-	ExcludeLimitedNonUpgradable bool   `json:"exclude_limited_non_upgradable,omitempty"`
-	ExcludeUnique               bool   `json:"exclude_unique,omitempty"`
-	ExcludeFromBlockchain       bool   `json:"exclude_from_blockchain,omitempty"`
-	SortByPrice                 bool   `json:"sort_by_price,omitempty"`
-	Offset                      string `json:"offset,omitempty"`
-	Limit                       int    `json:"limit,omitempty"`
+	// UserID Required. Unique identifier of the user
+	UserID int64 `json:"user_id"`
+	// ExcludeUnlimited Optional. Pass True to exclude gifts that can be purchased an unlimited number of times
+	ExcludeUnlimited bool `json:"exclude_unlimited,omitempty"`
+	// ExcludeLimitedUpgradable Optional. Pass True to exclude gifts that can be purchased a limited number of
+	// times and can be upgraded to unique
+	ExcludeLimitedUpgradable bool `json:"exclude_limited_upgradable,omitempty"`
+	// ExcludeLimitedNonUpgradable Optional. Pass True to exclude gifts that can be purchased a limited number
+	// of times and can't be upgraded to unique
+	ExcludeLimitedNonUpgradable bool `json:"exclude_limited_non_upgradable,omitempty"`
+	// ExcludeUnique Optional. Pass True to exclude unique gifts
+	ExcludeUnique bool `json:"exclude_unique,omitempty"`
+	// ExcludeFromBlockchain Optional. Pass True to exclude gifts that were assigned from the TON blockchain and
+	// can't be resold or transferred in Telegram
+	ExcludeFromBlockchain bool `json:"exclude_from_blockchain,omitempty"`
+	// SortByPrice Optional. Pass True to sort results by gift price instead of send date. Sorting is applied
+	// before pagination.
+	SortByPrice bool `json:"sort_by_price,omitempty"`
+	// Offset Optional. Offset of the first entry to return as received from the previous request; use an empty
+	// string to get the first chunk of results
+	Offset string `json:"offset,omitempty"`
+	// Limit Optional. The maximum number of gifts to be returned; 1-100. Defaults to 100.
+	Limit int `json:"limit,omitempty"`
 }
 
 // GetUserGifts returns gifts owned by a user.
@@ -117,9 +145,12 @@ func (api *API) GetUserGiftsWithContext(ctx context.Context, params GetUserGifts
 // Since: Bot API 10.0
 // See https://core.telegram.org/bots/api#getuserpersonalchatmessages
 type GetUserPersonalChatMessages struct {
+	// UserID Required. Unique identifier for the target user
 	UserID int64 `json:"user_id"`
-	Offset int   `json:"offset,omitempty"`
-	Limit  int   `json:"limit,omitempty"`
+	// Offset is the zero-based offset of the first message to return.
+	Offset int `json:"offset,omitempty"`
+	// Limit Required. The maximum number of messages to return; 1-20
+	Limit int `json:"limit,omitempty"`
 }
 
 // GetUserPersonalChatMessages returns messages from the personal chat of the user with the bot.

tgapi/users_types.go

@@ -4,57 +4,99 @@ package tgapi
 // Since: Bot API 1.0
 // See https://core.telegram.org/bots/api#user
 type User struct {
-	ID        int64   `json:"id"`
-	FirstName string  `json:"first_name"`
-	LastName  *string `json:"last_name,omitempty"`
-	Username  *string `json:"username,omitempty"`
+	// ID Unique identifier for this user or bot. This number may have more than 32 significant bits and some
+	// programming languages may have difficulty/silent defects in interpreting it. But it has at most 52
+	// significant bits, so a 64-bit integer or double-precision float type are safe for storing this
+	// identifier.
+	ID int64 `json:"id"`
+	// FirstName User's or bot's first name
+	FirstName string `json:"first_name"`
+	// LastName Optional. User's or bot's last name
+	LastName *string `json:"last_name,omitempty"`
+	// Username Optional. User's or bot's username
+	Username *string `json:"username,omitempty"`
 
-	IsBot                     bool    `json:"is_bot"`                                  // Since: Bot API 3.3
-	LanguageCode              *string `json:"language_code,omitempty"`                 // Since: Bot API 3.0
-	IsPremium                 *bool   `json:"is_premium,omitempty"`                    // Since: Bot API 6.1
-	AddedToAttachmentMenu     *bool   `json:"added_to_attachment_menu,omitempty"`      // Since: Bot API 6.1
-	CanJoinGroups             *bool   `json:"can_join_groups,omitempty"`               // Since: Bot API 4.6
-	CanReadAllGroupMessages   *bool   `json:"can_read_all_group_messages,omitempty"`   // Since: Bot API 4.6
-	SupportsInlineQueries     *bool   `json:"supports_inline_queries,omitempty"`       // Since: Bot API 4.6
-	CanConnectToBusiness      *bool   `json:"can_connect_to_business,omitempty"`       // Since: Bot API 7.2
-	HasMainWebApp             *bool   `json:"has_main_web_app,omitempty"`              // Since: Bot API 7.8
-	HasTopicsEnabled          *bool   `json:"has_topics_enabled,omitempty"`            // Since: Bot API 9.3
-	AllowsUsersToCreateTopics *bool   `json:"allows_users_to_create_topics,omitempty"` // Since: Bot API 9.4
-	CanManageBots             *bool   `json:"can_manage_bots,omitempty"`               // Since: Bot API 9.6
-	SupportsGuestQueries      *bool   `json:"supports_guest_queries,omitempty"`        // Since: Bot API 10.0
+	// IsBot True, if this user is a bot
+	IsBot bool `json:"is_bot"` // Since: Bot API 3.3
+	// LanguageCode Optional. IETF language tag of the user's language
+	LanguageCode *string `json:"language_code,omitempty"` // Since: Bot API 3.0
+	// IsPremium Optional. True, if this user is a Telegram Premium user
+	IsPremium *bool `json:"is_premium,omitempty"` // Since: Bot API 6.1
+	// AddedToAttachmentMenu Optional. True, if this user added the bot to the attachment menu
+	AddedToAttachmentMenu *bool `json:"added_to_attachment_menu,omitempty"` // Since: Bot API 6.1
+	// CanJoinGroups Optional. True, if the bot can be invited to groups. Returned only in getMe.
+	CanJoinGroups *bool `json:"can_join_groups,omitempty"` // Since: Bot API 4.6
+	// CanReadAllGroupMessages Optional. True, if privacy mode is disabled for the bot. Returned only in getMe.
+	CanReadAllGroupMessages *bool `json:"can_read_all_group_messages,omitempty"` // Since: Bot API 4.6
+	// SupportsInlineQueries Optional. True, if the bot supports inline queries. Returned only in getMe.
+	SupportsInlineQueries *bool `json:"supports_inline_queries,omitempty"` // Since: Bot API 4.6
+	// CanConnectToBusiness Optional. True, if the bot can be connected to a user account to manage it. Returned
+	// only in getMe.
+	CanConnectToBusiness *bool `json:"can_connect_to_business,omitempty"` // Since: Bot API 7.2
+	// HasMainWebApp Optional. True, if the bot has a main Web App. Returned only in getMe.
+	HasMainWebApp *bool `json:"has_main_web_app,omitempty"` // Since: Bot API 7.8
+	// HasTopicsEnabled Optional. True, if the bot has forum topic mode enabled in private chats. Returned only
+	// in getMe.
+	HasTopicsEnabled *bool `json:"has_topics_enabled,omitempty"` // Since: Bot API 9.3
+	// AllowsUsersToCreateTopics Optional. True, if the bot allows users to create and delete topics in private
+	// chats. Returned only in getMe.
+	AllowsUsersToCreateTopics *bool `json:"allows_users_to_create_topics,omitempty"` // Since: Bot API 9.4
+	// CanManageBots Optional. True, if other bots can be created to be controlled by the bot. Returned only in
+	// getMe.
+	CanManageBots *bool `json:"can_manage_bots,omitempty"` // Since: Bot API 9.6
+	// SupportsGuestQueries Optional. True, if the bot supports guest queries from chats it is not a member of.
+	// Returned only in getMe.
+	SupportsGuestQueries *bool `json:"supports_guest_queries,omitempty"` // Since: Bot API 10.0
+
+	// SupportsJoinRequestQueries reports that the bot supports join request
+	// queries and can be assigned to process them. Returned only in getMe.
+	SupportsJoinRequestQueries *bool `json:"supports_join_request_queries,omitempty"` // Since: Bot API 10.1
 }
 
 // UserProfilePhotos represents a user's profile photos.
 // Since: Bot API 1.4
 // See https://core.telegram.org/bots/api#userprofilephotos
 type UserProfilePhotos struct {
-	TotalCount int           `json:"total_count"`
-	Photos     [][]PhotoSize `json:"photos"`
+	// TotalCount Total number of profile pictures the target user has
+	TotalCount int `json:"total_count"`
+	// Photos Requested profile pictures (in up to 4 sizes each)
+	Photos [][]PhotoSize `json:"photos"`
 }
 
 // UserProfileAudios represents a user's profile audios.
 // Since: Bot API 9.3
 // See https://core.telegram.org/bots/api#userprofileaudios
 type UserProfileAudios struct {
-	TotalCount int     `json:"total_count"`
-	Audios     []Audio `json:"audios"`
+	// TotalCount Total number of profile audios for the target user
+	TotalCount int `json:"total_count"`
+	// Audios Requested profile audios
+	Audios []Audio `json:"audios"`
 }
 
 // UserRating represents a user's rating with level progression.
 // Since: Bot API 9.3
 // See https://core.telegram.org/bots/api#userrating
 type UserRating struct {
-	Level              int `json:"level"`
-	Rating             int `json:"rating"`
+	// Level Current level of the user, indicating their reliability when purchasing digital goods and services.
+	// A higher level suggests a more trustworthy customer; a negative level is likely reason for concern.
+	Level int `json:"level"`
+	// Rating Numerical value of the user's rating; the higher the rating, the better
+	Rating int `json:"rating"`
+	// CurrentLevelRating The rating value required to get the current level
 	CurrentLevelRating int `json:"current_level_rating"`
-	NextLevelRating    int `json:"next_level_rating"`
+	// NextLevelRating Optional. The rating value required to get to the next level; omitted if the maximum
+	// level was reached
+	NextLevelRating int `json:"next_level_rating"`
 }
 
 // Birthdate represents a user's birthdate.
 // Since: Bot API 7.2
 // See https://core.telegram.org/bots/api#birthdate
 type Birthdate struct {
-	Day   int `json:"day"`
+	// Day Day of the user's birth; 1-31
+	Day int `json:"day"`
+	// Month Month of the user's birth; 1-12
 	Month int `json:"month"`
-	Year  int `json:"year"`
+	// Year Optional. Year of the user's birth
+	Year int `json:"year"`
 }

tgapi/wire_tags_test.go

@@ -0,0 +1,75 @@
+package tgapi
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+)
+
+func TestTelegramWireFieldNames(t *testing.T) {
+	tests := []struct {
+		name  string
+		value any
+		keys  []string
+		bad   []string
+	}{
+		{
+			name:  "successful payment provider charge",
+			value: SuccessfulPayment{ProviderPaymentChargeID: "provider"},
+			keys:  []string{"provider_payment_charge_id"},
+			bad:   []string{"proviced_payment_charge_id"},
+		},
+		{
+			name:  "refunded payment provider charge",
+			value: RefundedPayment{ProviderPaymentChargeID: "provider"},
+			keys:  []string{"provider_payment_charge_id"},
+			bad:   []string{"proviced_payment_charge_id"},
+		},
+		{
+			name:  "owned gift id",
+			value: OwnedGift{OwnedGiftID: "gift"},
+			keys:  []string{"owned_gift_id"},
+			bad:   []string{"ownen_gift_id"},
+		},
+		{
+			name: "input checklist permissions",
+			value: InputChecklist{
+				OtherCanAddTasks:        true,
+				OtherCanMarkTasksAsDone: true,
+			},
+			keys: []string{"others_can_add_tasks", "others_can_mark_tasks_as_done"},
+			bad:  []string{"other_can_add_tasks", "other_can_mark_tasks_as_done"},
+		},
+		{
+			name:  "available reactions",
+			value: ChatFullInfo{AvailableReaction: []ReactionType{{Type: "emoji"}}},
+			keys:  []string{"available_reactions"},
+			bad:   []string{"available_reaction"},
+		},
+		{
+			name:  "reply quote parse mode",
+			value: ReplyParameters{QuoteParsingMode: "HTML"},
+			keys:  []string{"quote_parse_mode"},
+			bad:   []string{"quote_parsing_mode"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			data, err := json.Marshal(tt.value)
+			if err != nil {
+				t.Fatalf("Marshal returned error: %v", err)
+			}
+			for _, key := range tt.keys {
+				if !strings.Contains(string(data), `"`+key+`"`) {
+					t.Errorf("expected key %q in %s", key, data)
+				}
+			}
+			for _, key := range tt.bad {
+				if strings.Contains(string(data), `"`+key+`"`) {
+					t.Errorf("unexpected misspelled key %q in %s", key, data)
+				}
+			}
+		})
+	}
+}

tgfmt/html.go

@@ -2,7 +2,6 @@ package tgfmt
 
 import (
 	"strconv"
-	"strings"
 )
 
 // HTML is an escaped Telegram HTML fragment.
@@ -11,43 +10,25 @@ import (
 type HTML string
 
 // EscapeHTML escapes special characters for Telegram HTML parse mode.
-func EscapeHTML(s string) HTML {
-	s = strings.ReplaceAll(s, "&", "&")
-	s = strings.ReplaceAll(s, "<", "&lt;")
-	s = strings.ReplaceAll(s, ">", "&gt;")
-	s = strings.ReplaceAll(s, `"`, "&quot;")
-	return HTML(s)
-}
+func EscapeHTML(s string) HTML { return HTML(escapeHTML(s)) }
 
 // Bold returns h wrapped as bold Telegram HTML text.
-func (h HTML) Bold() HTML {
-	return "<b>" + h + "</b>"
-}
+func (h HTML) Bold() HTML { return "<b>" + h + "</b>" }
 
 // Italic returns h wrapped as italic Telegram HTML text.
-func (h HTML) Italic() HTML {
-	return "<i>" + h + "</i>"
-}
+func (h HTML) Italic() HTML { return "<i>" + h + "</i>" }
 
 // Underline returns h wrapped as underlined Telegram HTML text.
-func (h HTML) Underline() HTML {
-	return "<u>" + h + "</u>"
-}
+func (h HTML) Underline() HTML { return "<u>" + h + "</u>" }
 
 // Strikethrough returns h wrapped as strikethrough Telegram HTML text.
-func (h HTML) Strikethrough() HTML {
-	return "<s>" + h + "</s>"
-}
+func (h HTML) Strikethrough() HTML { return "<s>" + h + "</s>" }
 
 // Spoiler returns h wrapped as spoiler Telegram HTML text.
-func (h HTML) Spoiler() HTML {
-	return "<tg-spoiler>" + h + "</tg-spoiler>"
-}
+func (h HTML) Spoiler() HTML { return "<tg-spoiler>" + h + "</tg-spoiler>" }
 
 // Link returns h as a Telegram HTML text link.
-func (h HTML) Link(url string) HTML {
-	return `<a href="` + escapeHTMLAttr(url) + `">` + h + "</a>"
-}
+func (h HTML) Link(url string) HTML { return `<a href="` + escapeHTMLAttr(url) + `">` + h + "</a>" }
 
 // Mention returns h as a Telegram HTML user mention.
 func (h HTML) Mention(userID int64) HTML {
@@ -70,14 +51,10 @@ func (h HTML) TimeFormat(unix int64, format string) HTML {
 }
 
 // InlineCode returns h wrapped as inline code Telegram HTML text.
-func (h HTML) InlineCode() HTML {
-	return "<code>" + h + "</code>"
-}
+func (h HTML) InlineCode() HTML { return "<code>" + h + "</code>" }
 
 // BlockCode returns h wrapped as a Telegram HTML code block.
-func (h HTML) BlockCode() HTML {
-	return "<pre>" + h + "</pre>"
-}
+func (h HTML) BlockCode() HTML { return "<pre>" + h + "</pre>" }
 
 // BlockCodeLanguage returns h wrapped as a Telegram HTML code block with language.
 func (h HTML) BlockCodeLanguage(lang string) HTML {
@@ -85,15 +62,9 @@ func (h HTML) BlockCodeLanguage(lang string) HTML {
 }
 
 // Quote returns h as a Telegram HTML blockquote.
-func (h HTML) Quote() HTML {
-	return "<blockquote>" + h + "</blockquote>"
-}
+func (h HTML) Quote() HTML { return "<blockquote>" + h + "</blockquote>" }
 
 // QuoteExpandable returns h as a Telegram HTML expandable blockquote.
-func (h HTML) QuoteExpandable() HTML {
-	return "<blockquote expandable>" + h + "</blockquote>"
-}
+func (h HTML) QuoteExpandable() HTML { return "<blockquote expandable>" + h + "</blockquote>" }
 
-func escapeHTMLAttr(s string) HTML {
-	return EscapeHTML(s)
-}
+func escapeHTMLAttr(s string) HTML { return HTML(escapeHTML(s)) }

tgfmt/md.go

@@ -2,7 +2,6 @@ package tgfmt
 
 import (
 	"strconv"
-	"strings"
 )
 
 // Markdown is an escaped legacy Telegram Markdown fragment.
@@ -13,27 +12,16 @@ type Markdown string
 // EscapeMarkdown escapes special characters for legacy Telegram Markdown.
 //
 // Deprecated: Use EscapeMarkdownV2 instead.
-func EscapeMarkdown(s string) Markdown {
-	s = strings.ReplaceAll(s, "_", `\_`)
-	s = strings.ReplaceAll(s, "*", `\*`)
-	s = strings.ReplaceAll(s, "[", `\[`)
-	return Markdown(strings.ReplaceAll(s, "`", "\\`"))
-}
+func EscapeMarkdown(s string) Markdown { return Markdown(escapeMD(s)) }
 
 // Bold returns s wrapped as bold legacy Telegram Markdown text.
-func (s Markdown) Bold() Markdown {
-	return "*" + s + "*"
-}
+func (s Markdown) Bold() Markdown { return "*" + s + "*" }
 
 // Italic returns s wrapped as italic legacy Telegram Markdown text.
-func (s Markdown) Italic() Markdown {
-	return "_" + s + "_"
-}
+func (s Markdown) Italic() Markdown { return "_" + s + "_" }
 
 // Link returns s as a legacy Telegram Markdown text link.
-func (s Markdown) Link(url string) Markdown {
-	return "[" + s + "](" + Markdown(url) + ")"
-}
+func (s Markdown) Link(url string) Markdown { return "[" + s + "](" + Markdown(url) + ")" }
 
 // Mention returns s as a legacy Telegram Markdown user mention.
 func (s Markdown) Mention(userID int64) Markdown {
@@ -41,14 +29,10 @@ func (s Markdown) Mention(userID int64) Markdown {
 }
 
 // InlineCode returns s wrapped as inline code legacy Telegram Markdown text.
-func (s Markdown) InlineCode() Markdown {
-	return "`" + s + "`"
-}
+func (s Markdown) InlineCode() Markdown { return "`" + s + "`" }
 
 // BlockCode returns s wrapped as a legacy Telegram Markdown code block.
-func (s Markdown) BlockCode() Markdown {
-	return "```\n" + s + "\n```"
-}
+func (s Markdown) BlockCode() Markdown { return "```\n" + s + "\n```" }
 
 // BlockCodeLanguage returns s wrapped as a legacy Telegram Markdown code block.
 func (s Markdown) BlockCodeLanguage(lang string) Markdown {

tgfmt/mdv2.go

@@ -12,38 +12,22 @@ type MarkdownV2 string
 
 // EscapeMarkdownV2 escapes special characters for Telegram MarkdownV2.
 // https://core.telegram.org/bots/api#markdownv2-style
-func EscapeMarkdownV2(s string) MarkdownV2 {
-	symbols := []string{"\\", "_", "*", "[", "]", "(", ")", "~", "`", ">", "#", "+", "-", "=", "|", "{", "}", ".", "!"}
-	for _, symbol := range symbols {
-		s = strings.ReplaceAll(s, symbol, "\\"+symbol)
-	}
-	return MarkdownV2(s)
-}
+func EscapeMarkdownV2(s string) MarkdownV2 { return MarkdownV2(escapeMDv2(s)) }
 
 // Bold returns s wrapped as bold Telegram MarkdownV2 text.
-func (s MarkdownV2) Bold() MarkdownV2 {
-	return "*" + s + "*"
-}
+func (s MarkdownV2) Bold() MarkdownV2 { return "*" + s + "*" }
 
 // Italic returns s wrapped as italic Telegram MarkdownV2 text.
-func (s MarkdownV2) Italic() MarkdownV2 {
-	return "_" + s + "_"
-}
+func (s MarkdownV2) Italic() MarkdownV2 { return "_" + s + "_" }
 
 // Underline returns s wrapped as underlined Telegram MarkdownV2 text.
-func (s MarkdownV2) Underline() MarkdownV2 {
-	return "__" + s + "__"
-}
+func (s MarkdownV2) Underline() MarkdownV2 { return "__" + s + "__" }
 
 // Strikethrough returns s wrapped as strikethrough Telegram MarkdownV2 text.
-func (s MarkdownV2) Strikethrough() MarkdownV2 {
-	return "~" + s + "~"
-}
+func (s MarkdownV2) Strikethrough() MarkdownV2 { return "~" + s + "~" }
 
 // Spoiler returns s wrapped as spoiler Telegram MarkdownV2 text.
-func (s MarkdownV2) Spoiler() MarkdownV2 {
-	return "||" + s + "||"
-}
+func (s MarkdownV2) Spoiler() MarkdownV2 { return "||" + s + "||" }
 
 // Link returns s as a Telegram MarkdownV2 text link.
 func (s MarkdownV2) Link(url string) MarkdownV2 {
@@ -57,7 +41,7 @@ func (s MarkdownV2) Mention(userID uint64) MarkdownV2 {
 
 // Emoji returns s as a Telegram MarkdownV2 custom emoji.
 func (s MarkdownV2) Emoji(emojiID string) MarkdownV2 {
-	return "[" + s + "](tg://emoji?id=" + escapeMarkdownV2LinkDestination(emojiID) + ")"
+	return "![" + s + "](tg://emoji?id=" + escapeMarkdownV2LinkDestination(emojiID) + ")"
 }
 
 // Time returns s as a Telegram MarkdownV2 localized timestamp.
@@ -73,17 +57,18 @@ func (s MarkdownV2) TimeFormat(unix uint64, format string) MarkdownV2 {
 
 // InlineCode returns s wrapped as inline code Telegram MarkdownV2 text.
 func (s MarkdownV2) InlineCode() MarkdownV2 {
-	return "`" + s + "`"
+	return "`" + escapeMarkdownV2Code(unescapeMarkdownV2Fragment(s)) + "`"
 }
 
 // BlockCode returns s wrapped as a Telegram MarkdownV2 code block.
 func (s MarkdownV2) BlockCode() MarkdownV2 {
-	return "```\n" + s + "\n```"
+	return "```\n" + escapeMarkdownV2Code(unescapeMarkdownV2Fragment(s)) + "\n```"
 }
 
 // BlockCodeLanguage returns s wrapped as a Telegram MarkdownV2 code block with language.
 func (s MarkdownV2) BlockCodeLanguage(lang string) MarkdownV2 {
-	return "```" + MarkdownV2(lang) + "\n" + s + "\n```"
+	return "```" + MarkdownV2(sanitizeMarkdownV2CodeLanguage(lang)) + "\n" +
+		escapeMarkdownV2Code(unescapeMarkdownV2Fragment(s)) + "\n```"
 }
 
 // Quote returns s as a Telegram MarkdownV2 blockquote.
@@ -93,7 +78,37 @@ func (s MarkdownV2) Quote() MarkdownV2 {
 
 // QuoteExpandable returns s as a Telegram MarkdownV2 expandable blockquote.
 func (s MarkdownV2) QuoteExpandable() MarkdownV2 {
-	return "**>" + s
+	return MarkdownV2("**>" + strings.ReplaceAll(string(s), "\n", "\n>") + "||")
+}
+
+func unescapeMarkdownV2Fragment(s MarkdownV2) string {
+	fragment := string(s)
+	var result strings.Builder
+	result.Grow(len(fragment))
+	for i := 0; i < len(fragment); i++ {
+		if fragment[i] == '\\' && i+1 < len(fragment) && fragment[i+1] >= 1 && fragment[i+1] <= 126 {
+			i++
+		}
+		result.WriteByte(fragment[i])
+	}
+	return result.String()
+}
+
+func escapeMarkdownV2Code(s string) MarkdownV2 {
+	s = strings.ReplaceAll(s, "\\", "\\\\")
+	s = strings.ReplaceAll(s, "`", "\\`")
+	return MarkdownV2(s)
+}
+
+func sanitizeMarkdownV2CodeLanguage(lang string) string {
+	return strings.Map(func(r rune) rune {
+		switch r {
+		case '`', '\\', '\r', '\n':
+			return -1
+		default:
+			return r
+		}
+	}, lang)
 }
 
 func escapeMarkdownV2LinkDestination(s string) MarkdownV2 {

tgfmt/mdv2_test.go

@@ -35,7 +35,9 @@ func TestMarkdownV2FormattingMethods(t *testing.T) {
 		{name: "block code", got: EscapeMarkdownV2("text").BlockCode(), want: "```\ntext\n```"},
 		{name: "block code language", got: EscapeMarkdownV2("text").BlockCodeLanguage("go"), want: "```go\ntext\n```"},
 		{name: "quote", got: EscapeMarkdownV2("a\nb").Quote(), want: ">a\n>b"},
-		{name: "expandable quote", got: EscapeMarkdownV2("text").QuoteExpandable(), want: "**>text"},
+		{name: "expandable quote", got: EscapeMarkdownV2("a\nb").QuoteExpandable(), want: "**>a\n>b||"},
+		{name: "inline code escaping", got: EscapeMarkdownV2("a-b`c\\d").InlineCode(), want: "`a-b\\`c\\\\d`"},
+		{name: "block code language sanitizing", got: EscapeMarkdownV2("text").BlockCodeLanguage("go`\nboom"), want: "```goboom\ntext\n```"},
 	}
 
 	for _, tt := range tests {
@@ -63,7 +65,7 @@ func TestMarkdownV2SpecialLinks(t *testing.T) {
 		want MarkdownV2
 	}{
 		{name: "mention", got: EscapeMarkdownV2("User").Mention(123), want: "[User](tg://user?id=123)"},
-		{name: "emoji", got: EscapeMarkdownV2("emoji").Emoji(`12)3`), want: `[emoji](tg://emoji?id=12\)3)`},
+		{name: "emoji", got: EscapeMarkdownV2("👍").Emoji(`12)3`), want: `![👍](tg://emoji?id=12\)3)`},
 		{name: "time", got: EscapeMarkdownV2("date").Time(1772323200), want: "![date](tg://time?unix=1772323200)"},
 		{name: "time format", got: EscapeMarkdownV2("date").TimeFormat(1772323200, `MMM ) yyyy`), want: `![date](tg://time?unix=1772323200&format=MMM \) yyyy)`},
 	}

tgfmt/utils.go

@@ -1,6 +1,31 @@
 package tgfmt
 
-import "strings"
+import (
+	"strings"
+)
+
+func escapeHTML(s string) string {
+	s = strings.ReplaceAll(s, "&", "&")
+	s = strings.ReplaceAll(s, "<", "&lt;")
+	s = strings.ReplaceAll(s, ">", "&gt;")
+	s = strings.ReplaceAll(s, `"`, "&quot;")
+	return s
+}
+
+func escapeMD(s string) string {
+	s = strings.ReplaceAll(s, "_", `\_`)
+	s = strings.ReplaceAll(s, "*", `\*`)
+	s = strings.ReplaceAll(s, "[", `\[`)
+	s = strings.ReplaceAll(s, "`", "\\`")
+	return s
+}
+func escapeMDv2(s string) string {
+	symbols := []string{"\\", "_", "*", "[", "]", "(", ")", "~", "`", ">", "#", "+", "-", "=", "|", "{", "}", ".", "!"}
+	for _, symbol := range symbols {
+		s = strings.ReplaceAll(s, symbol, "\\"+symbol)
+	}
+	return s
+}
 
 // EscapePunctuation escapes '.', '!' and '-' for MarkdownV2 fragments.
 func EscapePunctuation(s string) string {

tgrich/ast.go

@@ -0,0 +1,191 @@
+package tgrich
+
+import (
+	"time"
+
+	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
+)
+
+const (
+	maxRichTextChars = 32768
+	maxRichBlocks    = 500
+	maxRichDepth     = 16
+	maxRichMedia     = 50
+	maxTableColumns  = 20
+)
+
+// Text creates a plain rich-text node.
+//
+// Since: Bot API 10.1
+func Text(s string) tgapi.RichText { return tgapi.RichTextPlain(s) }
+
+// Bold applies bold formatting to t.
+//
+// Since: Bot API 10.1
+func Bold(t tgapi.RichText) tgapi.RichText { return tgapi.RichTextWrap{Tag: "bold", Text: t} }
+
+// Italic applies italic formatting to t.
+//
+// Since: Bot API 10.1
+func Italic(t tgapi.RichText) tgapi.RichText { return tgapi.RichTextWrap{Tag: "italic", Text: t} }
+
+// Underline applies underline formatting to t.
+//
+// Since: Bot API 10.1
+func Underline(t tgapi.RichText) tgapi.RichText { return tgapi.RichTextWrap{Tag: "underline", Text: t} }
+
+// Strikethrough applies strikethrough formatting to t.
+//
+// Since: Bot API 10.1
+func Strikethrough(t tgapi.RichText) tgapi.RichText {
+	return tgapi.RichTextWrap{Tag: "strikethrough", Text: t}
+}
+
+// Spoiler hides t behind a spoiler.
+//
+// Since: Bot API 10.1
+func Spoiler(t tgapi.RichText) tgapi.RichText { return tgapi.RichTextWrap{Tag: "spoiler", Text: t} }
+
+// DateTime associates t with ts using Telegram's default date-time format.
+//
+// Since: Bot API 10.1
+func DateTime(t tgapi.RichText, ts time.Time) tgapi.RichText {
+	return tgapi.RichTextDateTime{Text: t, UnixTime: ts.Unix()}
+}
+
+// DateTimeWithFormat associates t with ts using format.
+//
+// Since: Bot API 10.1
+func DateTimeWithFormat(t tgapi.RichText, ts time.Time, format string) tgapi.RichText {
+	return tgapi.RichTextDateTime{Text: t, UnixTime: ts.Unix(), DateTimeFormat: format}
+}
+
+// TextMention mentions u with the display text t.
+//
+// Since: Bot API 10.1
+func TextMention(t tgapi.RichText, u tgapi.User) tgapi.RichText {
+	return tgapi.RichTextTextMention{Text: t, User: u}
+}
+
+// Subscript applies subscript formatting to t.
+//
+// Since: Bot API 10.1
+func Subscript(t tgapi.RichText) tgapi.RichText { return tgapi.RichTextWrap{Tag: "subscript", Text: t} }
+
+// Superscript applies superscript formatting to t.
+//
+// Since: Bot API 10.1
+func Superscript(t tgapi.RichText) tgapi.RichText {
+	return tgapi.RichTextWrap{Tag: "superscript", Text: t}
+}
+
+// Marked highlights t.
+//
+// Since: Bot API 10.1
+func Marked(t tgapi.RichText) tgapi.RichText { return tgapi.RichTextWrap{Tag: "marked", Text: t} }
+
+// Code applies monospaced formatting to t.
+//
+// Since: Bot API 10.1
+func Code(t tgapi.RichText) tgapi.RichText { return tgapi.RichTextWrap{Tag: "code", Text: t} }
+
+// Emoji creates a custom emoji with emojiID and alternative text t.
+//
+// Since: Bot API 10.1
+func Emoji(t, emojiID string) tgapi.RichText {
+	return tgapi.RichTextCustomEmoji{CustomEmojiID: emojiID, AlternativeText: t}
+}
+
+// MathExpression creates an inline LaTeX expression.
+//
+// Since: Bot API 10.1
+func MathExpression(exp string) tgapi.RichTextMathematicalExpression {
+	return tgapi.RichTextMathematicalExpression{Expression: exp}
+}
+
+// URL links t to url.
+//
+// Since: Bot API 10.1
+func URL(t tgapi.RichText, url string) tgapi.RichTextURL { return tgapi.RichTextURL{Text: t, URL: url} }
+
+// Email marks t as an email address.
+//
+// Since: Bot API 10.1
+func Email(t tgapi.RichText, email string) tgapi.RichTextEmailAddress {
+	return tgapi.RichTextEmailAddress{Text: t, EmailAddress: email}
+}
+
+// Phone marks t as a phone number.
+//
+// Since: Bot API 10.1
+func Phone(t tgapi.RichText, phone string) tgapi.RichTextPhoneNumber {
+	return tgapi.RichTextPhoneNumber{Text: t, PhoneNumber: phone}
+}
+
+// BankCardNumber marks t as a bank card number.
+//
+// Since: Bot API 10.1
+func BankCardNumber(t tgapi.RichText, number string) tgapi.RichTextBankCardNumber {
+	return tgapi.RichTextBankCardNumber{Text: t, BankCardNumber: number}
+}
+
+// Mention marks t as a mention of username.
+//
+// Since: Bot API 10.1
+func Mention(t tgapi.RichText, username string) tgapi.RichTextMention {
+	return tgapi.RichTextMention{Text: t, Username: username}
+}
+
+// Hashtag marks t as hashtag.
+//
+// Since: Bot API 10.1
+func Hashtag(t tgapi.RichText, hashtag string) tgapi.RichTextHashtag {
+	return tgapi.RichTextHashtag{Text: t, Hashtag: hashtag}
+}
+
+// Cashtag marks t as cashtag.
+//
+// Since: Bot API 10.1
+func Cashtag(t tgapi.RichText, cashtag string) tgapi.RichTextCashtag {
+	return tgapi.RichTextCashtag{Text: t, Cashtag: cashtag}
+}
+
+// BotCommand marks t as command.
+//
+// Since: Bot API 10.1
+func BotCommand(t tgapi.RichText, command string) tgapi.RichTextBotCommand {
+	return tgapi.RichTextBotCommand{Text: t, BotCommand: command}
+}
+
+// TextAnchor creates an inline anchor named name.
+//
+// Since: Bot API 10.1
+func TextAnchor(name string) tgapi.RichTextAnchor {
+	return tgapi.RichTextAnchor{Name: name}
+}
+
+// AnchorLink links t to the anchor named name.
+//
+// Since: Bot API 10.1
+func AnchorLink(t tgapi.RichText, name string) tgapi.RichTextAnchorLink {
+	return tgapi.RichTextAnchorLink{Text: t, AnchorName: name}
+}
+
+// Reference defines t as a named reference target.
+//
+// Since: Bot API 10.1
+func Reference(t tgapi.RichText, name string) tgapi.RichTextReference {
+	return tgapi.RichTextReference{Text: t, Name: name}
+}
+
+// ReferenceLink links t to the named reference name.
+//
+// Since: Bot API 10.1
+func ReferenceLink(t tgapi.RichText, name string) tgapi.RichTextReferenceLink {
+	return tgapi.RichTextReferenceLink{Text: t, ReferenceName: name}
+}
+
+// Concat concatenates rich-text nodes.
+//
+// Since: Bot API 10.1
+func Concat(items ...tgapi.RichText) tgapi.RichText { return tgapi.RichTextArray(items) }