Provably fair
Every result can be checked. Nobody, including us, can change it after you bet.
How results are made
Each player has a seed pair:
- a secret server seed from us. You see its SHA-256 hash before you bet, so it can't be swapped later;
- a client seed you can change any time;
- a nonce that goes up by one with every bet.
Every result is calculated with HMAC-SHA256(server seed, "client seed:nonce"), turned into numbers between 0 and 1. The same inputs always give the same result.
How to verify a round
- Open any game and click Fairness at the top.
- Change your client seed. This reveals the old server seed and starts a new one.
- Check that the revealed seed matches the hash you were shown before.
- Use the Verify tab with that seed, your client seed and the bet's nonce to recompute the result in your browser.
House edge
Original games return about 99% of what's bet on average. Official cases return 95%, and every case lists each item's exact drop chance. Payout tables are shown in each game.
Shared games
Crash and Double use one result for everyone per round. The round's hash is shown before betting closes and its seed is revealed afterwards, next to the round number. See Crash for an example.