Provably Fair
Committed before you play
Before your first spin, the server generates a secret seed and publishes its SHA-256 hash. Because the hash is published first, the seed cannot be chosen afterwards to suit a result.
You control half of it
You set the client seed. A counter — the nonce — increments once per spin, and the database will not record two spins under the same seed and counter.
How a spin is computed
Reel positions come from HMAC-SHA256 of your client seed and the nonce, keyed with the server seed. Values that would bias the result are discarded rather than folded, so every position on the strip is equally likely.
Checking it yourself
Rotate your seed from your account page. The retired seed is revealed immediately, and you can recompute every spin you took under it on the Provably Fair page — or with any HMAC-SHA256 tool. If a recomputed spin disagrees with what we recorded, you can prove it.
What this does not cover
The reel strips are published and fixed. Drop weights, payouts and the jackpot rate are set by the operator and can be changed; fairness here means the reels are honest, not that the paytable is generous.