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/mtproto/handle_session_created_test.go

@@ -0,0 +1,61 @@
+package mtproto
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+	"go.uber.org/zap/zaptest/observer"
+
+	"github.com/gotd/neo"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/mt"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/proto"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tdsync"
+)
+
+func TestConn_handleSessionCreated(t *testing.T) {
+	t.Run("NeedSynchronization", func(t *testing.T) {
+		a := require.New(t)
+		logger, logs := observer.New(zapcore.WarnLevel)
+
+		now := time.Unix(100, 0)
+		clock := neo.NewTime(now)
+		gotSession := tdsync.NewReady()
+		conn := Conn{
+			clock:      clock,
+			log:        zap.New(logger),
+			gotSession: gotSession,
+			handler:    newTestHandler(),
+		}
+
+		buf := bin.Buffer{}
+		msgID := proto.NewMessageID(now.Add(maxFuture+time.Second), proto.MessageFromClient)
+		a.NoError(buf.Encode(&mt.NewSessionCreated{
+			FirstMsgID: int64(msgID),
+			UniqueID:   10,
+			ServerSalt: 10,
+		}))
+		a.NoError(conn.handleSessionCreated(&buf))
+
+		select {
+		case <-gotSession.Ready():
+		default:
+			t.Fatal("expected gotSession signal")
+		}
+		a.Equal(int64(10), conn.salt)
+
+		msgs := logs.All()
+		a.Len(msgs, 1)
+		a.Equal("Local clock needs synchronization", msgs[0].Message)
+	})
+	t.Run("Invalid", func(t *testing.T) {
+		conn := Conn{}
+		buf := bin.Buffer{}
+		buf.PutID(mt.NewSessionCreatedTypeID)
+		require.Error(t, conn.handleSessionCreated(&buf))
+	})
+}