Provably fair

Every result comes from a server seed we commit to before you bet (you see its SHA-256 hash), your own client seed, and a nonce that goes up by one each round. After you rotate your seed pair we reveal the server seed, so you can recompute every round yourself on the verify page.

How a result is made

  1. Bytes = HMAC_SHA256(serverSeed, clientSeed:nonce:cursor). Each 4 bytes become a number in [0, 1) by dividing by 2³².
  2. Coin Toss: the first number decides heads or tails.
  3. Mines: the numbers drive a Fisher–Yates shuffle of the 25 tiles; the first N are mines.
  4. Blackjack: the numbers shuffle the shoe once, at the start of the round.
  5. All randomness is drawn when the round starts, so your choices can't change what's already decided, and neither can we.
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