Provably fair

Verify any pack opening

Soccer Grails publishes a SHA-256 hash of the server seed before every opening. After the pull, we reveal the seed — verify the outcome yourself with one HMAC.

Algorithm
roll = HMAC-SHA256(serverSeed, clientSeed + ":" + nonce)
roll_float = parseInt(roll[0..13], 16) / 2^52
tier = cumulative odds threshold lookup

The server seed hash is committed before the opening. After the pull, the seed is revealed and the same calculation can be reproduced anywhere — Python, Node, or any HMAC tool.

Recent vault pulls

Live pulls from our three sport vaults. Provably-fair seed verification applies to demo spins on pack pages — on-chain vault opens are settled on Collector Crypt.

  • Player_E5AFZQ · All-Sport Vault3m ago
    2020 #116 Desmond Bane PSA 9 Pan

    Live vault pull · settled on Collector Crypt