HTTP 400 · Bad Request
HTTP 400 Channels & Chats

When & why it happens

The request would not change the current chat about — server rejects no-op edits.

Handling in gogram

Surfaced as *gogram.ErrResponseCode. Match on the message:

if err, ok := err.(*gogram.ErrResponseCode); ok { if err.Message == "CHAT_ABOUT_NOT_MODIFIED" { // handle this error } }