View Source ExTDLib.Method.OpenMessageContent (ExTDLib v0.0.4)

Informs TDLib that the message content has been opened (e.g., the user has opened a photo, video, document, location or venue, or has listened to an audio file or voice note message). An updateMessageContentOpened update will be generated if something has changed. Returns object_ptr<Ok>.

NameTypeDescription
chat_idstringChat identifier of the message.
message_idstringIdentifier of the message with the opened content.

More details on telegram's documentation.