View Source ExTDLib.Object.UpdateMessageSendFailed (ExTDLib v0.0.4)

A message failed to send. Be aware that some messages being sent can be irrecoverably deleted, in which case updateDeleteMessages will be received instead of this update.

NameTypeDescription
messagemessageThe failed to send message.
old_message_idstringThe previous temporary message identifier.
errorerrorThe cause of the message sending failure.

More details on telegram's documentation.