move gotd fork into repo. (#111)

- update to latest telegram layer
- remove some references to fields in tg.Entities that don't exist in
the schema
- originally added here:
https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e
  - referenced here
-
https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3
-
https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e

pkg/gotd/telegram/updates/config.go

@@ -0,0 +1,62 @@
+package updates
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/trace"
+	"go.uber.org/zap"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+// API is the interface which contains
+// Telegram RPC methods used by manager for internalState synchronization.
+type API interface {
+	UpdatesGetState(ctx context.Context) (*tg.UpdatesState, error)
+	UpdatesGetDifference(ctx context.Context, request *tg.UpdatesGetDifferenceRequest) (tg.UpdatesDifferenceClass, error)
+	UpdatesGetChannelDifference(ctx context.Context, request *tg.UpdatesGetChannelDifferenceRequest) (tg.UpdatesChannelDifferenceClass, error)
+}
+
+// Config of the manager.
+type Config struct {
+	// Handler where updates will be passed.
+	Handler telegram.UpdateHandler
+	// Callback called if manager cannot
+	// recover channel gap (optional).
+	OnChannelTooLong func(channelID int64) error
+	// State storage.
+	// In-mem used if not provided.
+	Storage StateStorage
+	// Channel access hash storage.
+	// In-mem used if not provided.
+	AccessHasher AccessHasher
+	// Logger (optional).
+	Logger *zap.Logger
+	// TracerProvider (optional).
+	TracerProvider trace.TracerProvider
+}
+
+func (cfg *Config) setDefaults() {
+	if cfg.Handler == nil {
+		panic("Handler is nil")
+	}
+	if cfg.AccessHasher == nil {
+		cfg.AccessHasher = newMemAccessHasher()
+	}
+	if cfg.Logger == nil {
+		cfg.Logger = zap.NewNop()
+	}
+	if cfg.TracerProvider == nil {
+		cfg.TracerProvider = trace.NewNoopTracerProvider()
+	}
+	if cfg.Storage == nil {
+		cfg.Storage = newMemStorage()
+	}
+	if cfg.OnChannelTooLong == nil {
+		cfg.OnChannelTooLong = func(channelID int64) error {
+			cfg.Logger.Error("Difference too long", zap.Int64("channel_id", channelID))
+			return nil
+		}
+	}
+}