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

A user changed the answer to a poll; for bots only.

NameTypeDescription
poll_idstringUnique poll identifier.
voter_idMessageSenderIdentifier of the message sender that changed the answer to the poll.
option_idsnumber0-based identifiers of answer options, chosen by the user.

More details on telegram's documentation.