diff --git a/CHANGELOG b/CHANGELOG
index c531adf..7726801 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+1.0.6
+* layer 18 support
 1.0.5
 * listening socket (tcp and unix) for commands
 1.0.4
diff --git a/encrypted_scheme17.tl b/encrypted_scheme17.tl
index 6418566..cc4a76d 100644
--- a/encrypted_scheme17.tl
+++ b/encrypted_scheme17.tl
@@ -1,10 +1,10 @@
 ---types---
-decryptedMessageLayer#99a438cf layer:int message:DecryptedMessage = DecryptedMessageLayer;
+decryptedMessageLayer#1be31789 layer:int message:DecryptedMessage = DecryptedMessageLayer;
 decryptedMessage_l16#1f814f1f random_id:long random_bytes:bytes message:string media:DecryptedMessageMedia = DecryptedMessage;
 decryptedMessageService_l16#aa48327d random_id:long random_bytes:bytes action:DecryptedMessageAction = DecryptedMessage;
 
-decryptedMessage#20a6d4e2 in_seq_no:int out_seq_no:int ttl:int random_id:long random_bytes:bytes message:string media:DecryptedMessageMedia = DecryptedMessage;
-decryptedMessageService#9bb84a4e in_seq_no:int out_seq_no:int random_id:long random_bytes:bytes action:DecryptedMessageAction = DecryptedMessage;
+decryptedMessage#204d3878 in_seq_no:int out_seq_no:int ttl:int random_id:long random_bytes:bytes message:string media:DecryptedMessageMedia = DecryptedMessage;
+decryptedMessageService#73164160 in_seq_no:int out_seq_no:int random_id:long random_bytes:bytes action:DecryptedMessageAction = DecryptedMessage;
 
 decryptedMessageMediaEmpty#89f5c4a = DecryptedMessageMedia;
 decryptedMessageMediaPhoto#32798a8c thumb:bytes thumb_w:int thumb_h:int w:int h:int size:int key:bytes iv:bytes = DecryptedMessageMedia;
diff --git a/queries.c b/queries.c
index dbc7d60..ebc10e1 100644
--- a/queries.c
+++ b/queries.c
@@ -896,14 +896,15 @@ void tgl_do_send_encr_msg_action (struct tgl_message *M, void (*callback)(void *
     out_int (CODE_decrypted_message_service_l16);
   } else {
     out_int (CODE_decrypted_message_layer);
+    out_random (15 + 4 * (lrand48 () % 3));
     out_int (TGL_ENCRYPTED_LAYER);
+    out_int (2 * P->encr_chat.in_seq_no + (P->encr_chat.admin_id != tgl_state.our_id));
+    out_int (2 * P->encr_chat.out_seq_no + (P->encr_chat.admin_id == tgl_state.our_id) - 2);
     out_int (CODE_decrypted_message_service);
   }
   out_long (M->id);
-  out_random (15 + 4 * (lrand48 () % 3));
-  if (P->encr_chat.layer >= 17) {
-    out_int (2 * P->encr_chat.in_seq_no + (P->encr_chat.admin_id != tgl_state.our_id));
-    out_int (2 * P->encr_chat.out_seq_no + (P->encr_chat.admin_id == tgl_state.our_id));
+  if (P->encr_chat.layer < 17) {
+    out_random (15 + 4 * (lrand48 () % 3));
   }
 
   switch (M->action.type) {
@@ -945,17 +946,19 @@ void tgl_do_send_encr_msg (struct tgl_message *M, void (*callback)(void *callbac
   out_long (M->id);
   encr_start ();
   if (P->encr_chat.layer <= 16) {
-    out_int (CODE_decrypted_message_l16);
+    out_int (CODE_decrypted_message_service_l16);
   } else {
     out_int (CODE_decrypted_message_layer);
+    out_random (15 + 4 * (lrand48 () % 3));
     out_int (TGL_ENCRYPTED_LAYER);
+    out_int (2 * P->encr_chat.in_seq_no + (P->encr_chat.admin_id != tgl_state.our_id));
+    out_int (2 * P->encr_chat.out_seq_no + (P->encr_chat.admin_id == tgl_state.our_id) - 2);
     out_int (CODE_decrypted_message);
   }
   out_long (M->id);
-  out_random (15 + 4 * (lrand48 () % 3));
-  if (P->encr_chat.layer >= 17) {
-    out_int (2 * P->encr_chat.in_seq_no + (P->encr_chat.admin_id != tgl_state.our_id));
-    out_int (2 * P->encr_chat.out_seq_no + (P->encr_chat.admin_id == tgl_state.our_id));
+  if (P->encr_chat.layer < 17) {
+    out_random (15 + 4 * (lrand48 () % 3));
+  } else {
     out_int (0);
   }
   out_cstring ((void *)M->message, M->message_len);
@@ -1692,17 +1695,19 @@ static void send_part (struct send_file *f, void *callback, void *callback_extra
       out_long (r);
       encr_start ();
       if (P->encr_chat.layer <= 16) {
-        out_int (CODE_decrypted_message_l16);
+        out_int (CODE_decrypted_message_service_l16);
       } else {
         out_int (CODE_decrypted_message_layer);
+        out_random (15 + 4 * (lrand48 () % 3));
         out_int (TGL_ENCRYPTED_LAYER);
+        out_int (2 * P->encr_chat.in_seq_no + (P->encr_chat.admin_id != tgl_state.our_id));
+        out_int (2 * P->encr_chat.out_seq_no + (P->encr_chat.admin_id == tgl_state.our_id));
         out_int (CODE_decrypted_message);
       }
       out_long (r);
-      out_random (15 + 4 * (lrand48 () % 3));
-      if (P->encr_chat.layer >= 17) {
-        out_int (2 * P->encr_chat.in_seq_no + (P->encr_chat.admin_id != tgl_state.our_id));
-        out_int (2 * P->encr_chat.out_seq_no + (P->encr_chat.admin_id == tgl_state.our_id) + 2);
+      if (P->encr_chat.layer < 17) {
+        out_random (15 + 4 * (lrand48 () % 3));
+      } else {
         out_int (0);
       }
       out_string ("");
@@ -2146,17 +2151,19 @@ void tgl_do_send_location(tgl_peer_id_t id, double latitude, double longitude, v
     out_long (r);
     encr_start ();
     if (P->encr_chat.layer <= 16) {
-      out_int (CODE_decrypted_message_l16);
+      out_int (CODE_decrypted_message_service_l16);
     } else {
       out_int (CODE_decrypted_message_layer);
+      out_random (15 + 4 * (lrand48 () % 3));
       out_int (TGL_ENCRYPTED_LAYER);
+      out_int (2 * P->encr_chat.in_seq_no + (P->encr_chat.admin_id != tgl_state.our_id));
+      out_int (2 * P->encr_chat.out_seq_no + (P->encr_chat.admin_id == tgl_state.our_id));
       out_int (CODE_decrypted_message);
     }
     out_long (r);
-    out_random (15 + 4 * (lrand48 () % 3));
-    if (P->encr_chat.layer >= 17) {
-      out_int (2 * P->encr_chat.in_seq_no + (P->encr_chat.admin_id != tgl_state.our_id));
-      out_int (2 * P->encr_chat.out_seq_no + (P->encr_chat.admin_id == tgl_state.our_id) + 2);
+    if (P->encr_chat.layer < 17) {
+      out_random (15 + 4 * (lrand48 () % 3));
+    } else {
       out_int (0);
     }
     out_string ("");
diff --git a/structures.c b/structures.c
index c4b933d..3f0570b 100644
--- a/structures.c
+++ b/structures.c
@@ -1235,26 +1235,22 @@ void tglf_fetch_encrypted_message (struct tgl_message *M) {
     in_end = in_ptr + ll; 
     x = fetch_int ();
     if (x == CODE_decrypted_message_layer) {
+      ll = prefetch_strlen ();
+      fetch_str (ll); // random_bytes
+
       int layer = fetch_int ();
       assert (layer >= 0);
       if (P && ((P->flags) & FLAG_CREATED)) {
         bl_do_encr_chat_set_layer ((void *)P, layer);
       }
-      x = fetch_int ();
-    }
-    assert (x == CODE_decrypted_message || x == CODE_decrypted_message_service || x == CODE_decrypted_message_l16 || x == CODE_decrypted_message_service_l16);
-    //assert (id == fetch_long ());
-    long long new_id = fetch_long ();
-    if (P && P->encr_chat.layer >= 17) {
-      assert (new_id == id);
-    }
-    ll = prefetch_strlen ();
-    fetch_str (ll); // random_bytes
-    if (x == CODE_decrypted_message || x == CODE_decrypted_message_service) {
+      //x = fetch_int ();
+      //assert (x == CODE_decrypted_message || x == CODE_decrypted_message_service);
+      
+
       out_seq_no = fetch_int ();
       in_seq_no = fetch_int ();
-      if (in_seq_no / 2 != P->encr_chat.in_seq_no + 1) {
-        vlogprintf (E_WARNING, "Hole in seq in secret chat. in_seq_no = %d, expect_seq_no = %d\n", in_seq_no / 2, P->encr_chat.in_seq_no + 1);
+      if (in_seq_no / 2 != P->encr_chat.in_seq_no) {
+        vlogprintf (E_WARNING, "Hole in seq in secret chat. in_seq_no = %d, expect_seq_no = %d\n", in_seq_no / 2, P->encr_chat.in_seq_no);
         drop = 1;
       }
       if ((in_seq_no & 1)  != 1 - (P->encr_chat.admin_id == tgl_state.our_id) || 
@@ -1272,9 +1268,21 @@ void tglf_fetch_encrypted_message (struct tgl_message *M) {
       }
       //vlogprintf (E_WARNING, "in = %d, out = %d\n", in_seq_no, out_seq_no);
       //P->encr_chat.in_seq_no = in_seq_no / 2;
+      x = fetch_int ();
+    }
+    assert (x == CODE_decrypted_message || x == CODE_decrypted_message_service || x == CODE_decrypted_message_l16 || x == CODE_decrypted_message_service_l16);
+    //assert (id == fetch_long ());
+    long long new_id = fetch_long ();
+    if (P && P->encr_chat.layer >= 17) {
+      assert (new_id == id);
+    }
+    if (x == CODE_decrypted_message || x == CODE_decrypted_message_service) {
       if (x == CODE_decrypted_message) {
         fetch_int (); // ttl
       }
+    } else {
+      ll = prefetch_strlen ();
+      fetch_str (ll); // random_bytes
     }
     if (x == CODE_decrypted_message || x == CODE_decrypted_message_l16) {
       l = prefetch_strlen ();
@@ -1285,8 +1293,8 @@ void tglf_fetch_encrypted_message (struct tgl_message *M) {
     } else {
       start = in_ptr;
       if (skip_type_any (TYPE_TO_PARAM (decrypted_message_action)) < 0) {
-        vlogprintf (E_ERROR, "Skipped %ld int out of %ld. Magic = 0x%08x\n", (long)(in_ptr - start), (long)(in_end - start), *start);
-        assert (0);
+        vlogprintf (E_ERROR, "Can not decrypt: Skipped %ld int out of %ld. Magic = 0x%08x\n", (long)(in_ptr - start), (long)(in_end - start), *start);
+        drop = 1;
       }
       end = in_ptr;
     }
@@ -1320,7 +1328,9 @@ void tglf_fetch_encrypted_message (struct tgl_message *M) {
     }
   }
   if (!drop) {
-    bl_do_encr_chat_update_seq ((void *)P, in_seq_no / 2, out_seq_no / 2);
+    if (in_seq_no >= 0 && out_seq_no >= 0) {
+      bl_do_encr_chat_update_seq ((void *)P, in_seq_no / 2 + 1, out_seq_no / 2);
+    }
   }
 }