Propagate DCOverrides

mtglib/proxy.go

@@ -302,11 +302,7 @@ func NewProxy(opts ProxyOpts) (*Proxy, error) {
 
 	logger := opts.getLogger("proxy")
 
-	tg, err := dc.New(
-		logger.Named("telegram"),
-		opts.getPreferIP(),
-		map[int][]string{},
-	) // TODO: propagate value
+	tg, err := dc.New(logger.Named("telegram"), opts.getPreferIP(), opts.DCOverrides)
 	if err != nil {
 		return nil, fmt.Errorf("cannot build telegram dc fetcher: %w", err)
 	}

mtglib/proxy_opts.go

@@ -113,6 +113,12 @@ type ProxyOpts struct {
 	//
 	// OBSOLETE and DEPRECATED. Ignored.
 	UseTestDCs bool
+
+	// DCOverrides defines a set of IP addresses that should be used
+	// with a higher priority to those that are calculated somehow by mtg.
+	//
+	// This is an optional setting
+	DCOverrides map[int][]string
 }
 
 func (p ProxyOpts) valid() error {