The 0xBTC Lottery

Before a draw, each ticket is checked against the blockchain: the 0xBTC Transfer event must exist, come from the real token contract, go from the buyer to the treasury, and cover the full amount paid. Unverifiable tickets never enter the draw.

Each verified ticket is one entry. Winners are drawn one place at a time using a cryptographically secure random number (crypto.getRandomValues), so every ticket has an equal chance and more tickets mean more entries. A wallet can win multiple places, but never more places than it holds tickets.

Prize lotteries (Play Prizes tab) work the same way but pay a physical prize or an online giftcard code instead of tokens. After the winner is drawn, the prize is shipped worldwide to the winner's address, while giftcard codes are sent directly to the winner's linked Telegram account.

The daily jackpot is 80% of the round's verified pool, the weekly jackpot 10%. The daily prize split is 60% / 25% / 10% / 5% across the top 4 places (5th–7th shares are folded into 1st). Payouts are sent automatically from the treasury on the chain where the winner bought most tickets, with the transaction hash recorded.