From c0ed709adff2607d77863a432630696769ee3f58 Mon Sep 17 00:00:00 2001
From: painor <pi.oussama@gmail.com>
Date: Tue, 12 Jan 2021 19:50:27 +0100
Subject: [PATCH] Add new format to resolve invite link (#1670)

---
 telethon/utils.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/telethon/utils.py b/telethon/utils.py
index 636dd93d..995ee904 100644
--- a/telethon/utils.py
+++ b/telethon/utils.py
@@ -1289,9 +1289,15 @@ def resolve_invite_link(link):
         payload = _decode_telegram_base64(link_hash)
 
     try:
-        return struct.unpack('>LLQ', payload)
+        if len(payload) == 12:
+            return 0, *struct.unpack('>LQ', payload)
+        elif len(payload) == 16:
+            return struct.unpack('>LLQ', payload)
+        else:
+            pass
     except (struct.error, TypeError):
-        return None, None, None
+        pass
+    return None, None, None
 
 
 def resolve_inline_message_id(inline_msg_id):