HTTP 400 · Bad Request
HTTP 400 Flood / Rate limits Parameterized

When & why it happens

Slow-mode is enabled in this chat; the bot/user must wait the given number of seconds before sending another message there.

Parameterized error

The wire code carries a parameter on its tail (literal you'll see: SLOWMODE_WAIT_42). Gogram parses it out and stores it on ErrResponseCode.AdditionalInfo with the right type.

Handling in gogram

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

if err, ok := err.(*gogram.ErrResponseCode); ok { if strings.HasPrefix(err.Message, "SLOWMODE_WAIT") { secs := err.AdditionalInfo.(int) time.Sleep(time.Duration(secs) * time.Second) // retry } }