Skip to content

Latest commit

 

History

History
22 lines (16 loc) · 1.57 KB

README.md

File metadata and controls

22 lines (16 loc) · 1.57 KB
Raw

ethereum-powerball

"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.

Basic setup:

  • Create contract on the blockchain, and call initialize to 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_configuration method.
  • If desired, you can set a custom RNG contract as well. The default one uses block.prevhash for 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 withdraw between lottos to claim them.

For players

  • Buy tickets by picking 5 (unique) numbers between 1 and 59, and one "powerball" number between 1 and 35. The return value of buy_ticket will 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_winnings with your ticket ID to claim your prize!