"Powerball"-style lottery written in Serpent, for prophetx's bounty.
This code is provided as a technical proof of concept. Please be aware that lotteries are subject to a great deal of regulation, and that actually launching this contract on a live blockchain is not guaranteed to be legal.
- Create contract on the blockchain, and call
initializeto set yourself as the admin. - Send an appropriate amount of funds to support the prizes you are configuring. Because Powerball-style lotteries have set prizes, you cannot rely on ticket sales to cover payouts.
- Set the ticket price, length of lottery and redemption period with the
set_configurationmethod. - If desired, you can set a custom RNG contract as well. The default one uses
block.prevhashfor its entropy. - Set the desired payouts with
set_payouts. See Wikipedia for odds. Note that you will also need to specify how much the Jackpot goes up if it's not won. - Start the lottery with
start_lotto. You will be unable to make changes to configuration or withdraw money until it has ended. - As you make profits, use
withdrawbetween lottos to claim them.
- Buy tickets by picking 5 (unique) numbers between 1 and 59, and one "powerball" number between 1 and 35. The return value of
buy_ticketwill be your ticket ID. - You can transfer your tickets with
transfer_ticket. - After the lotto has ended, and before the redemption period ends, call
claim_winningswith your ticket ID to claim your prize!