The list of chats which the user must join to participate in the giveaway.
Optionalcountry_A list of two-letter ISO 3166-1 alpha-2 country codes indicating the countries from which eligible users for the giveaway must come.
Optionalhas_True, if the list of giveaway winners will be visible to everyone.
Optionalonly_True, if only users who join the chats after the giveaway started should be eligible to win.
Optionalpremium_The number of months the Telegram Premium subscription won from the giveaway will be active for; for Telegram Premium giveaways only.
Optionalprize_Description of additional giveaway prize.
Optionalprize_The number of Telegram Stars to be split between giveaway winners; for Telegram Star giveaways only.
The number of users which are supposed to be selected as winners of the giveaway.
Point in time (Unix timestamp) when winners of the giveaway will be selected.
This object represents a message about a scheduled giveaway.
See
Telegram Bot API: Giveaway