Provably Fair

Every unboxing on Kaxxi can be independently verified. Before you ever open a box, we commit to a secret server seed by publishing its SHA-256 hash. Your rolls are derived from that seed, your own rotatable client seed, and an incrementing nonce, so we cannot pick outcomes, and you can prove it.

1. roll = HMAC_SHA256(serverSeed, clientSeed + ":" + nonce): take the first 13 hex characters and divide by 16¹³ to get a number in [0, 1).
2. Sort the box's prize pool by item id (ascending) and walk the cumulative drop probabilities; the first item whose cumulative probability exceeds the roll is your prize.
3. Rotate your seed pair below at any time: the old server seed is revealed so you can re-compute every past roll and check it against the committed hash. Each open also stores an odds hash, the SHA-256 of the exact odds table used, so the odds can't change behind your back.