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

The chat is a private chat with an administrator of a chat to which the user sent join request.

NameTypeDescription
titlestringTitle of the chat to which the join request was sent.
is_channelboolTrue, if the join request was sent to a channel chat.
request_datenumberPoint in time (Unix timestamp) when the join request was sent.

More details on telegram's documentation.