HTTP 400 · Bad Request
HTTP 400 Other Parameterized

When & why it happens

A previous chat-history import is still running; wait the supplied minutes before starting a new one.

Parameterized error

The wire code carries a parameter on its tail (literal you'll see: PREVIOUS_CHAT_IMPORT_ACTIVE_WAIT_42MIN). 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, "PREVIOUS_CHAT_IMPORT_ACTIVE_WAIT") { secs := err.AdditionalInfo.(int) time.Sleep(time.Duration(secs) * time.Second) // retry } }