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Trust

Provably fair

Every result is fixed by a commitment published before you bet, so neither you nor the casino can change it afterwards — and you can recompute it yourself.

Verify a round

Runs entirely in your browser with the same code the server uses.

Enter the revealed server seed.

Sign in to manage your seeds and verify your own bets.

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The three ingredients

  • Server seed — 32 random bytes generated by mulletbet. Before any bet you see only its SHA-256 hash: a fingerprint that commits us to the seed without revealing it.
  • Client seed — a value you choose, so the casino cannot pick a seed that targets you. You set it when you rotate, after the next server seed's hash is already published.
  • Nonce — a counter that increases by one with every bet on the same seed pair. The database guarantees a nonce is never used twice.

How a result is generated

Each round computes HMAC_SHA256(serverSeed, clientSeed:nonce:cursor). Every 4 bytes become a number between 0 and 1, and each game maps those numbers to its outcome — the exact formula for each game is in the verifier's source and in docs/PROVABLY_FAIR.md. For Dice: roll = floor(float × 10000) / 100, a number from 0.00 to 99.99.

How you verify it

  1. Note the hashed server seed shown before you play.
  2. Play as many rounds as you like.
  3. Rotate your seed pair. The previous server seed is revealed — check that its SHA-256 matches the hash you saw before playing (the verifier does this for you).
  4. Recompute any round from the server seed, your client seed and its nonce.

Crash

Crash is multiplayer, so a single round can't use your personal seeds. Its results come from a pre-generated chain of hashes whose final value is published in advance; each revealed round hash can be checked against the next.