diff --git a/mtproto/extras.go b/mtproto/extras.go
deleted file mode 100644
index 5c0ad19..0000000
--- a/mtproto/extras.go
+++ /dev/null
@@ -1,6 +0,0 @@
-package mtproto
-
-type Extras struct {
-	QuickAck  bool
-	SimpleAck bool
-}
diff --git a/mtproto/rpc/rpc.go b/mtproto/rpc/rpc.go
index 8f2ae99..0ae4d7f 100644
--- a/mtproto/rpc/rpc.go
+++ b/mtproto/rpc/rpc.go
@@ -4,3 +4,8 @@ const (
 	RPCNonceSeqNo     = -2
 	RPCHandshakeSeqNo = -1
 )
+
+type Extras struct {
+	QuickAck  bool
+	SimpleAck bool
+}
diff --git a/mtproto/rpc/rpc_proxy_request.go b/mtproto/rpc/rpc_proxy_request.go
index 84edafb..2ffa36f 100644
--- a/mtproto/rpc/rpc_proxy_request.go
+++ b/mtproto/rpc/rpc_proxy_request.go
@@ -28,8 +28,8 @@ type RPCProxyRequest struct {
 	RemoteIPPort [rpcProxyRequestIPPortLength]byte
 	LocalIPPort  [rpcProxyRequestIPPortLength]byte
 	ADTag        []byte
+	Extras       Extras
 	Message      *bytes.Buffer
-	Extras       *mtproto.Extras
 }
 
 func (r *RPCProxyRequest) Bytes() []byte {
@@ -65,7 +65,7 @@ func (r *RPCProxyRequest) Bytes() []byte {
 	return buf.Bytes()
 }
 
-func NewRPCProxyRequest(connectionType mtproto.ConnectionType, local, remote *net.TCPAddr, adTag []byte, extras *mtproto.Extras) (*RPCProxyRequest, error) {
+func NewRPCProxyRequest(connectionType mtproto.ConnectionType, local, remote *net.TCPAddr, adTag []byte, extras Extras) (*RPCProxyRequest, error) {
 	flags := RPCProxyRequestFlagsHasAdTag | RPCProxyRequestFlagsMagic | RPCProxyRequestFlagsExtMode2
 
 	switch connectionType {
diff --git a/telegram/middle.go b/telegram/middle.go
index 01a3b73..4f38b8f 100644
--- a/telegram/middle.go
+++ b/telegram/middle.go
@@ -8,13 +8,15 @@ import (
 	"go.uber.org/zap"
 
 	"github.com/9seconds/mtg/config"
+	"github.com/9seconds/mtg/mtproto"
+	"github.com/9seconds/mtg/wrappers"
 )
 
 type middleTelegram struct {
 	middleTelegramCaller
 }
 
-func NewMiddleTelegram(conf *config.Config, logger *zap.SugaredLogger) *middleTelegram {
+func NewMiddleTelegram(conf *config.Config, logger *zap.SugaredLogger) Telegram {
 	tg := &middleTelegram{
 		middleTelegramCaller: middleTelegramCaller{
 			baseTelegram: baseTelegram{
@@ -35,3 +37,7 @@ func NewMiddleTelegram(conf *config.Config, logger *zap.SugaredLogger) *middleTe
 
 	return tg
 }
+
+func (t *middleTelegram) Init(connOpts *mtproto.ConnectionOpts, conn wrappers.ReadWriteCloserWithAddr) (wrappers.ReadWriteCloserWithAddr, error) {
+	return nil, nil
+}