Is The Game Fair?
Double is a multiplayer game which uses a sha256 chain in combination with a undetermined client seed to fairly generate rounds.
Chain Generation To generate the chain, we begin with securely randomized bytes. From there, we iterate 10 million times feeding the previous seed into a sha256 function. Double games read the chain in a reverse order.
function parityValueFromHash(seed, salt) { let hash = String(CryptoJS.HmacSHA256(CryptoJS.enc.Hex.parse(seed), salt)); const hex = hash.slice(0, 8); const hexNumber = parseInt(hex, 16); return Math.floor((hexNumber*15)/0x100000000); } return parityValueFromHash(seed, salt);