@type t() :: %Telegex.Type.Giveaway{
  chats: [Telegex.Type.Chat.t()],
  country_codes: [String.t()] | nil,
  has_public_winners: boolean() | nil,
  only_new_members: boolean() | nil,
  premium_subscription_month_count: integer() | nil,
  prize_description: String.t() | nil,
  winner_count: integer(),
  winners_selection_date: integer()
}