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

The chat needs to be chosen by the user among chats of the specified types.

NameTypeDescription
allow_user_chatsboolTrue, if private chats with ordinary users are allowed.
allow_bot_chatsboolTrue, if private chats with other bots are allowed.
allow_group_chatsboolTrue, if basic group and supergroup chats are allowed.
allow_channel_chatsboolTrue, if channel chats are allowed.

More details on telegram's documentation.