HTTP 400 · Bad Request
HTTP 400 Other

When & why it happens

Returned when all available options for this type of number were already used. Treated by gogram as a regular API error; inspect ErrResponseCode.Message for the exact code.

Handling in gogram

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

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