From 5a1b9daf4c31174ba3b4719261c4d556c49c41c3 Mon Sep 17 00:00:00 2001
From: Lonami Exo <totufals@hotmail.com>
Date: Mon, 23 May 2022 13:17:12 +0200
Subject: [PATCH] Add back UpdateChannelTooLong check

Removed in the previous commit 2bcedb98.
---
 telethon/_updates/messagebox.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/telethon/_updates/messagebox.py b/telethon/_updates/messagebox.py
index d9b7c19d..2e4fed91 100644
--- a/telethon/_updates/messagebox.py
+++ b/telethon/_updates/messagebox.py
@@ -439,6 +439,11 @@ class MessageBox:
         *,
         reset_deadline,
     ):
+        # This update means we need to call getChannelDifference to get the updates from the channel
+        if isinstance(update, tl.UpdateChannelTooLong):
+            self.begin_get_diff(u.channel_id)
+            return None
+
         pts = PtsInfo.from_update(update)
         if not pts:
             # No pts means that the update can be applied in any order.