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/internal/e2etest/retry.go

@@ -0,0 +1,61 @@
+package e2etest
+
+import (
+	"context"
+	"time"
+
+	"github.com/cenkalti/backoff/v4"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tgerr"
+)
+
+type retryInvoker struct {
+	prev tg.Invoker
+}
+
+func retryResult[T any](ctx context.Context, cb func() (T, error)) (T, error) {
+	var zero T
+	return backoff.RetryWithData[T](func() (T, error) {
+		res, err := cb()
+		if err != nil {
+			if tgerr.IsCode(err, -500) {
+				return zero, err
+			}
+			if tgerr.Is(err, "CONNECTION_NOT_INITED") {
+				return zero, err
+			}
+			if ok, err := tgerr.FloodWait(ctx, err); ok {
+				return zero, err
+			}
+			return zero, backoff.Permanent(err)
+		}
+		return res, nil
+	}, backoff.WithContext(backoff.NewConstantBackOff(time.Millisecond*500), ctx))
+}
+
+func retry(ctx context.Context, cb func() error) error {
+	return backoff.Retry(func() error {
+		if err := cb(); err != nil {
+			if tgerr.IsCode(err, -500) {
+				return err
+			}
+			if tgerr.Is(err, "CONNECTION_NOT_INITED") {
+				return err
+			}
+			if ok, err := tgerr.FloodWait(ctx, err); ok {
+				return err
+			}
+			return backoff.Permanent(err)
+		}
+
+		return nil
+	}, backoff.WithContext(backoff.NewExponentialBackOff(), ctx))
+}
+
+func (w retryInvoker) Invoke(ctx context.Context, input bin.Encoder, output bin.Decoder) error {
+	return retry(ctx, func() error {
+		return w.prev.Invoke(ctx, input, output)
+	})
+}