Verifiable prize competitions
The draw that runs in public.
Buy a ticket and watch your money the whole way. It sits in a vault everyone can see, handled by the contract, never the organiser: at the draw the contract names the winner and the ticket money is released to the organiser, less the fee — and below the minimum every entrant claims a full refund instead. The prize is the organiser’s promise — we name them, so you know whose.
Where the money lives
Your money waits in glass.
From the moment you buy, your coin sits where anyone can watch it. The organiser never holds it. At the draw the contract writes down who won and moves nothing; the ticket money is then released to the organiser, less the fee, on a separate claim you can read on chain. The prize itself is theirs to hand over — the contract names the winner, it does not deliver the prize. And if the competition doesn’t reach its minimum, nobody releases anything: you claim your money back yourself, in full, from the contract. Not a promise. A function.
How a draw works
Sealed first. Drawn second. Every payment its own claim.
Each ticket is recorded the moment it’s bought — paid or free, one entry, one equal weight.
Sales stop, the list is fixed and published. A late ticket isn’t against the rules — it’s a transaction that fails.
Sui’s randomness delivers the number and the contract writes down who won. Once, and only once. Money moves afterwards, on separate claims anyone can read.
The receipt
The chain remembers, so you’re free to forget.
Every settled draw leaves a public record — the sealed list, the number, the winner, the payout. Open it tonight or in ten years; it re-derives the same way every time.
All results →One sealed list, one draw, one result — on the chain, forever.
The organiser’s return
Transparency isn’t a cost. It’s the pitch.
What we expect: every guarantee the contract makes to your entrants comes back to you as something easier to sell, easier to defend, and easier to repeat. One organiser has run on this — us, so far.
The pot in public escrow answers the one question that stops a ticket sale — “where does my money go?” — before it’s asked.
Every settled draw is a permanent receipt you can link in the next promo. Proof travels; promises don’t.
“Who won?” “Where’s the refund?” — answered by the chain, in public, not by you at 2am. Disputes end at the receipt.
Rule 8.24 of the UK’s CAP Code asks for verifiably random draws; an on-chain record is evidence you can link. Compliance is the organiser’s, and we are not counsel.
For competition organisers
Run a draw your community can watch.
You bring the prize and the audience; the contract does the careful part — escrow, sealing, the draw, the payout, the receipt. Your entrants get proof instead of promises, and you get to be the organiser who showed them the whole machine.