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Provably Fair
Crash rounds are shared by all players, so the client seed is a fixed public value (aslot-client-seed) and the nonce is the round number. The server seed of each round is fixed in advance and its SHA-256 hash is published before the round starts.
Calculate
HMAC_SHA256(key = server seed, message = client seed + ":" + nonce).Take the first 8 hex characters of the result as a number
h(0 … 232 − 1).Crash point =
floor(RTP × 232 / (232 − h)) / 100, where RTP is the game RTP in percent, limited to the range 1.00× … 1000×.
Is the game fair?
Every result of our original games is decided by numbers that are fixed before you place your bet. Nobody — neither you nor us — can change a result after the bet is made, and you can check every single round yourself.
Seeds and nonce
Server seed — a random value we generate. Before you play you only see its SHA-256 hash, so it cannot be changed later. When you rotate your seed pair, the old server seed is revealed and you can compare it with the hash you saw.
Client seed — a value you choose. You can change it at any time from the Fairness (Seeds) window of any game.
Nonce — the number of bets made with the current seed pair. It grows by one with every bet, so each bet gets a different result.
How to verify a bet
Open the Fairness window in a game, rotate your seed pair to reveal the server seed, then use the Verify tool (or any HMAC / hash calculator) with the server seed, client seed and nonce of the bet. The result must match the one you received. Server seeds are written as hex; use them without a leading 0x (except in Lottery, where the seeds are used exactly as published). Choose a game above to see exactly how its result is calculated.
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