diff --git a/binlog.c b/binlog.c
index 75aeaa9..0fadb63 100644
--- a/binlog.c
+++ b/binlog.c
@@ -1193,6 +1193,28 @@ static int fetch_comb_binlog_delete_msg (void *extra) {
   return 0;
 }
 
+
+static int fetch_comb_binlog_msg_seq_update (void *extra) {
+  struct tgl_message *M = tgl_message_get (fetch_long ());
+  assert (M);
+  tgl_state.seq ++;
+
+  if (tgl_state.callback.msg_receive) {
+    tgl_state.callback.msg_receive (M);
+  }
+  return 0;
+}
+
+static int fetch_comb_binlog_msg_update (void *extra) {
+  struct tgl_message *M = tgl_message_get (fetch_long ());
+  assert (M);
+
+  if (tgl_state.callback.msg_receive) {
+    tgl_state.callback.msg_receive (M);
+  }
+  return 0;
+}
+
 #define FETCH_COMBINATOR_FUNCTION(NAME) \
   case CODE_ ## NAME:\
     ok = fetch_comb_ ## NAME (0); \
@@ -1275,6 +1297,8 @@ static void replay_log_event (void) {
   FETCH_COMBINATOR_FUNCTION (binlog_set_message_sent)
   FETCH_COMBINATOR_FUNCTION (binlog_set_msg_id)
   FETCH_COMBINATOR_FUNCTION (binlog_delete_msg)
+  FETCH_COMBINATOR_FUNCTION (binlog_msg_seq_update)
+  FETCH_COMBINATOR_FUNCTION (binlog_msg_update)
   default:
     vlogprintf (E_ERROR, "Unknown op 0x%08x\n", op);
     assert (0);
@@ -1989,3 +2013,17 @@ void bl_do_delete_msg (struct tgl_message *M) {
   out_long (M->id);
   add_log_event (packet_buffer, 4 * (packet_ptr - packet_buffer));
 }
+
+void bl_do_msg_seq_update (long long id) {
+  clear_packet ();
+  out_int (CODE_binlog_msg_seq_update);
+  out_long (id);
+  add_log_event (packet_buffer, 4 * (packet_ptr - packet_buffer));
+}
+
+void bl_do_msg_update (long long id) {
+  clear_packet ();
+  out_int (CODE_binlog_msg_update);
+  out_long (id);
+  add_log_event (packet_buffer, 4 * (packet_ptr - packet_buffer));
+}
diff --git a/binlog.h b/binlog.h
index c059303..cdaaa29 100644
--- a/binlog.h
+++ b/binlog.h
@@ -83,4 +83,7 @@ void bl_do_set_unread (struct tgl_message *M, int unread);
 void bl_do_set_message_sent (struct tgl_message *M);
 void bl_do_set_msg_id (struct tgl_message *M, int id);
 void bl_do_delete_msg (struct tgl_message *M);
+
+void bl_do_msg_seq_update (long long id);
+void bl_do_msg_update (long long id);
 #endif
diff --git a/binlog.tl b/binlog.tl
index 74290ae..4cc334a 100644
--- a/binlog.tl
+++ b/binlog.tl
@@ -64,3 +64,6 @@ binlog.messageSetUnread id:int = binlog.Update;
 binlog.setMessageSent id:long = binlog.Update;
 binlog.setMsgId old_id:long new_id:int = binlog.Update;
 binlog.deleteMsg id:long = binlog.Update;
+
+binlog.msgSeqUpdate id:long = binlog.Update;
+binlog.msgUpdate id:long = binlog.Update;
diff --git a/interface.c b/interface.c
index a819b3d..2856fef 100644
--- a/interface.c
+++ b/interface.c
@@ -681,7 +681,7 @@ void interpreter_chat_mode (char *line) {
     return;
   }
   if (strlen (line)>0) {
-    tgl_do_send_message (chat_mode_id, line, strlen (line), print_msg_gw, 0);
+    tgl_do_send_message (chat_mode_id, line, strlen (line), 0, 0);
   }
 }
 
@@ -740,7 +740,8 @@ struct tgl_update_callback upd_cb = {
   .secret_chat_request = 0,
   .secret_chat_established = 0,
   .secret_chat_deleted = 0,
-  .secret_chat_accepted = 0
+  .secret_chat_accepted = 0,
+  .msg_receive = print_message_gw
 };
 
 
@@ -829,7 +830,7 @@ void interpreter (char *line UU) {
       printf ("Empty message\n");
       RET;
     }
-    tgl_do_send_message (id, s, strlen (s), print_msg_gw, 0);
+    tgl_do_send_message (id, s, strlen (s), 0, 0);
   } else if (IS_WORD ("rename_chat")) {
     GET_PEER_CHAT;
     int t;
@@ -838,7 +839,7 @@ void interpreter (char *line UU) {
       printf ("Empty new name\n");
       RET;
     }
-    tgl_do_rename_chat (id, s, print_msg_gw, 0);
+    tgl_do_rename_chat (id, s, 0, 0);
   } else if (IS_WORD ("send_photo")) {
     GET_PEER;
     int t;
@@ -847,7 +848,7 @@ void interpreter (char *line UU) {
       printf ("Empty file name\n");
       RET;
     }
-    tgl_do_send_photo (tgl_message_media_photo, id, strndup (s, t), print_msg_gw, 0);
+    tgl_do_send_photo (tgl_message_media_photo, id, strndup (s, t), 0, 0);
   } else if (IS_WORD("send_video")) {
     GET_PEER;
     int t;
@@ -856,7 +857,7 @@ void interpreter (char *line UU) {
       printf ("Empty file name\n");
       RET;
     }
-    tgl_do_send_photo (tgl_message_media_video, id, strndup (s, t), print_msg_gw, 0);
+    tgl_do_send_photo (tgl_message_media_video, id, strndup (s, t), 0, 0);
   } else if (IS_WORD ("send_text")) {
     GET_PEER;
     int t;
@@ -865,7 +866,7 @@ void interpreter (char *line UU) {
       printf ("Empty file name\n");
       RET;
     }
-    tgl_do_send_text (id, strndup (s, t), print_msg_gw, 0);
+    tgl_do_send_text (id, strndup (s, t), 0, 0);
   } else if (IS_WORD ("fwd")) {
     GET_PEER;
     int num = next_token_int ();
@@ -873,7 +874,7 @@ void interpreter (char *line UU) {
       printf ("Bad msg id\n");
       RET;
     }
-    tgl_do_forward_message (id, num, print_msg_gw, 0);
+    tgl_do_forward_message (id, num, 0, 0);
   } else if (IS_WORD ("load_photo")) {
     long long num = next_token_int ();
     if (num == NOT_FOUND) {
@@ -974,12 +975,12 @@ void interpreter (char *line UU) {
     GET_PEER_CHAT;    
     tgl_peer_id_t chat_id = id;
     GET_PEER_USER;
-    tgl_do_add_user_to_chat (chat_id, id, 100, print_msg_gw, 0);
+    tgl_do_add_user_to_chat (chat_id, id, 100, 0, 0);
   } else if (IS_WORD ("chat_del_user")) {
     GET_PEER_CHAT;    
     tgl_peer_id_t chat_id = id;
     GET_PEER_USER;
-    tgl_do_del_user_from_chat (chat_id, id, print_msg_gw, 0);
+    tgl_do_del_user_from_chat (chat_id, id, 0, 0);
   } else if (IS_WORD ("add_contact")) {
     int phone_len, first_name_len, last_name_len;
     char *phone, *first_name, *last_name;
@@ -1129,7 +1130,7 @@ void interpreter (char *line UU) {
       printf ("Empty chat topic\n");
       RET;
     }    
-    tgl_do_create_group_chat (id, s, print_msg_gw, 0);  
+    tgl_do_create_group_chat (id, s, 0, 0);  
   //} else if (IS_WORD ("suggested_contacts")) {
   //  tgl_do_get_suggested ();
   } else if (IS_WORD ("status_online")) {
@@ -1152,7 +1153,7 @@ void interpreter (char *line UU) {
       printf ("Empty file name\n");
       RET;
     }
-    tgl_do_send_photo (tgl_message_media_audio, id, strndup (s, t), print_msg_gw, 0);
+    tgl_do_send_photo (tgl_message_media_audio, id, strndup (s, t), 0, 0);
   } else if (IS_WORD("send_document")) {
     GET_PEER;
     int t;
@@ -1161,7 +1162,7 @@ void interpreter (char *line UU) {
       printf ("Empty file name\n");
       RET;
     }
-    tgl_do_send_photo (tgl_message_media_document, id, strndup (s, t), print_msg_gw, 0);
+    tgl_do_send_photo (tgl_message_media_document, id, strndup (s, t), 0, 0);
   } else if (IS_WORD ("load_audio")) {
     long long num = next_token_int ();
     if (num == NOT_FOUND) {
diff --git a/loop.c b/loop.c
index c186b5b..ae865ce 100644
--- a/loop.c
+++ b/loop.c
@@ -63,6 +63,7 @@ extern int unknown_user_list[];
 int register_mode;
 extern int safe_quit;
 int queries_num;
+extern int sync_from_start;
 
 void got_it (char *line, int len);
 
@@ -366,7 +367,7 @@ int loop (void) {
 
   set_interface_callbacks ();
 
-  tgl_do_get_difference (0, get_difference_callback, 0);
+  tgl_do_get_difference (sync_from_start, get_difference_callback, 0);
   net_loop (0, dgot);
   #ifdef USE_LUA
     lua_diff_end ();
diff --git a/queries.c b/queries.c
index 63aeb6b..567f746 100644
--- a/queries.c
+++ b/queries.c
@@ -774,6 +774,7 @@ static int msg_send_encr_on_answer (struct query *q UU) {
   //M->date = fetch_int ();
   fetch_int ();
   bl_do_set_message_sent (M);
+  bl_do_msg_update (M->id);
 
   if (q->callback) {
     ((void (*)(void *, int, struct tgl_message *))q->callback) (q->callback_extra, 1, M);
@@ -789,7 +790,14 @@ static int msg_send_on_answer (struct query *q UU) {
   bl_do_set_msg_id (M, id);
   tglu_fetch_date ();
   tglu_fetch_pts ();
-  tglu_fetch_seq ();
+  //tglu_fetch_seq ();
+  //bl_do_
+  int seq = fetch_int ();
+  if (seq == tgl_state.seq + 1) {
+    bl_do_msg_seq_update (id);
+  } else {
+    tgl_do_get_difference (0, 0, 0);
+  }
   if (x == CODE_messages_sent_message_link) {
     assert (skip_type_any (TYPE_TO_PARAM_1 (vector, TYPE_TO_PARAM (contacts_link))) >= 0);
   }
@@ -1005,7 +1013,8 @@ void tgl_do_send_text (tgl_peer_id_t id, char *file_name, void (*callback)(void
 static int mark_read_on_receive (struct query *q UU) {
   assert (fetch_int () == (int)CODE_messages_affected_history);
   tglu_fetch_pts ();
-  tglu_fetch_seq ();
+  //tglu_fetch_seq ();
+  fetch_int (); // seq
   fetch_int (); // offset
   if (q->callback) {
     ((void (*)(void *, int))q->callback)(q->callback_extra, 1);
@@ -1316,7 +1325,14 @@ static int send_file_on_answer (struct query *q UU) {
     tglf_fetch_alloc_user ();
   }
   tglu_fetch_pts ();
-  tglu_fetch_seq ();
+  //tglu_fetch_seq ();
+  
+  int seq = fetch_int ();
+  if (seq == tgl_state.seq + 1) {
+    bl_do_msg_seq_update (M->id);
+  } else {
+    tgl_do_get_difference (0, 0, 0);
+  }
 
   if (q->callback) {
     ((void (*)(void *, int, struct tgl_message *))q->callback)(q->callback_extra, 1, M);
@@ -1338,6 +1354,7 @@ static int send_encr_file_on_answer (struct query *q UU) {
   assert (fetch_int () == M->media.encr_photo.key_fingerprint);
   //print_message (M);
   tglm_message_insert (M);
+  bl_do_msg_update (M->id);
   
   if (q->callback) {
     ((void (*)(void *, int, struct tgl_message *))q->callback)(q->callback_extra, 1, M);
@@ -1654,7 +1671,13 @@ static int fwd_msg_on_answer (struct query *q UU) {
     tglf_fetch_alloc_user ();
   }
   tglu_fetch_pts ();
-  tglu_fetch_seq ();
+  
+  int seq = fetch_int ();
+  if (seq == tgl_state.seq + 1) {
+    bl_do_msg_seq_update (M->id);
+  } else {
+    tgl_do_get_difference (0, 0, 0);
+  }
   //print_message (M);
   if (q->callback) {
     ((void (*)(void *, int, struct tgl_message *))q->callback) (q->callback_extra, 1, M);
@@ -1698,7 +1721,12 @@ static int rename_chat_on_answer (struct query *q UU) {
     tglf_fetch_alloc_user ();
   }
   tglu_fetch_pts ();
-  tglu_fetch_seq ();
+  int seq = fetch_int ();
+  if (seq == tgl_state.seq + 1) {
+    bl_do_msg_seq_update (M->id);
+  } else {
+    tgl_do_get_difference (0, 0, 0);
+  }
   //print_message (M);
   if (q->callback) {
     ((void (*)(void *, int, struct tgl_message *))q->callback) (q->callback_extra, 1, M);
@@ -2739,15 +2767,20 @@ static int get_difference_on_answer (struct query *q UU) {
       print_message (ML[i]);
     }*/
     for (i = 0; i < ml_pos; i++) {
-      tgl_state.callback.new_msg (ML[i]);
+      //tgl_state.callback.new_msg (ML[i]);
+      bl_do_msg_update (ML[i]->id);
     }
     for (i = 0; i < el_pos; i++) {
-      tgl_state.callback.new_msg (EL[i]);
+      //tgl_state.callback.new_msg (EL[i]);
+      bl_do_msg_update (EL[i]->id);
     }
     tfree (ML, ml_pos * sizeof (void *));
     tfree (EL, el_pos * sizeof (void *));
 
     if (x == CODE_updates_difference_slice) {
+      if (q->callback) {
+        ((void (*)(void *, int))q->callback) (q->callback_extra, 1);
+      }
       tgl_do_get_difference (0, q->callback, q->callback_extra);
     } else {
       //difference_got = 1;
diff --git a/structures.c b/structures.c
index 1bd37b6..ab4bea2 100644
--- a/structures.c
+++ b/structures.c
@@ -642,7 +642,8 @@ void tglf_fetch_message_short (struct tgl_message *M) {
     tglu_fetch_pts ();
     
     int date = fetch_int ();
-    tglu_fetch_seq ();
+    //tglu_fetch_seq ();
+    fetch_int ();
 
     bl_do_create_message_text (id, from_id, TGL_PEER_USER, to_id, date, l, s);
   } else {
@@ -653,7 +654,8 @@ void tglf_fetch_message_short (struct tgl_message *M) {
     
     tglu_fetch_pts ();
     fetch_int ();
-    tglu_fetch_seq ();
+    //tglu_fetch_seq ();
+    fetch_int ();
   }
 }
 
@@ -670,8 +672,9 @@ void tglf_fetch_message_short_chat (struct tgl_message *M) {
     tglu_fetch_pts ();
     
     int date = fetch_int ();
-    tglu_fetch_seq ();
+    //tglu_fetch_seq ();
 
+    fetch_int ();
     bl_do_create_message_text (id, from_id, TGL_PEER_CHAT, to_id, date, l, s);
   } else {
     fetch_int (); // id
@@ -682,7 +685,8 @@ void tglf_fetch_message_short_chat (struct tgl_message *M) {
     
     tglu_fetch_pts ();
     fetch_int ();
-    tglu_fetch_seq ();
+    //tglu_fetch_seq ();
+    fetch_int ();
   }
 }
 
diff --git a/tgl.h b/tgl.h
index 6a66ec4..d2cc672 100644
--- a/tgl.h
+++ b/tgl.h
@@ -39,6 +39,7 @@ struct tgl_update_callback {
   //void (*secret_chat_created)(struct tgl_secret_chat *U);
   void (*chat_created)(struct tgl_chat *C);
   void (*chat_update)(struct tgl_chat *C);
+  void (*msg_receive)(struct tgl_message *M);
 };
 
 struct tgl_net_methods {
diff --git a/updates.c b/updates.c
index 1da3cf3..1397be4 100644
--- a/updates.c
+++ b/updates.c
@@ -657,10 +657,30 @@ void tglu_work_update_short (struct connection *c, long long msg_id) {
   
   assert (save_end == in_ptr);
 }
+  
+static int do_skip_seq (int seq) {
+  if (tgl_state.seq) {
+    if (seq <= tgl_state.seq) {
+      vlogprintf (E_NOTICE, "Duplicate message with seq=%d\n", seq);
+      return -1;
+    }
+    if (seq > tgl_state.seq + 1) {
+      vlogprintf (E_NOTICE, "Hole in seq (seq = %d, cur_seq = %d)\n", seq, tgl_state.seq);
+      tgl_do_get_difference (0, 0, 0);
+      return -1;
+    }
+    return 0;
+  } else {
+    return -1;
+  }
+}
 
 void tglu_work_updates (struct connection *c, long long msg_id) {
   int *save = in_ptr;
   assert (!skip_type_any (TYPE_TO_PARAM (updates)));
+  if (do_skip_seq (*(in_ptr - 1)) < 0) {
+    return;
+  }
   int *save_end = in_ptr;
   in_ptr = save;
   assert (fetch_int () == CODE_updates);
@@ -681,13 +701,17 @@ void tglu_work_updates (struct connection *c, long long msg_id) {
     tglf_fetch_alloc_chat ();
   }
   bl_do_set_date (fetch_int ());
-  bl_do_set_seq (fetch_int ());
+  //bl_do_set_seq (fetch_int ());
+  fetch_int ();
   assert (save_end == in_ptr);
 }
 
 void tglu_work_update_short_message (struct connection *c, long long msg_id) {
   int *save = in_ptr;
   assert (!skip_type_any (TYPE_TO_PARAM (updates)));  
+  if (do_skip_seq (*(in_ptr - 1)) < 0) {
+    return;
+  }
   int *save_end = in_ptr;
   in_ptr = save;
 
@@ -707,6 +731,9 @@ void tglu_work_update_short_message (struct connection *c, long long msg_id) {
 void tglu_work_update_short_chat_message (struct connection *c, long long msg_id) {
   int *save = in_ptr;
   assert (!skip_type_any (TYPE_TO_PARAM (updates)));  
+  if (do_skip_seq (*(in_ptr - 1)) < 0) {
+    return;
+  }
   int *save_end = in_ptr;
   in_ptr = save;
 
@@ -720,6 +747,8 @@ void tglu_work_update_short_chat_message (struct connection *c, long long msg_id
     last_date = M->date;
   }*/
   assert (save_end == in_ptr);
+
+  bl_do_msg_seq_update (M->id);
 }
 
 void tglu_work_updates_to_long (struct connection *c, long long msg_id) {