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

A request to send a message has reached the Telegram server. This doesn't mean that the message will be sent successfully. This update is sent only if the option "use_quick_ack" is set to true. This update may be sent multiple times for the same message.

NameTypeDescription
chat_idstringThe chat identifier of the sent message.
message_idstringA temporary message identifier.

More details on telegram's documentation.