Provably Fair

Every crash round outcome is determined before it starts, then committed to with a cryptographic hash. After the round, we reveal the server seed — you can verify the result yourself.

Server Seed (revealed after crash) Client Seed (default: driftless) Claimed Crash Multiplier

How It Works

Before each round starts, the server generates a random server seed and commits to it by publishing its SHA-256 hash. This hash is displayed in the game UI before any bets are placed — you can verify it didn't change after the fact.

The crash multiplier is computed as: HMAC-SHA256(serverSeed, clientSeed) → mapped through an inverse exponential distribution with a 4% house edge. The first 32 bits of the HMAC determine the outcome.

After the round crashes, the server seed is revealed. Anyone can recompute the multiplier from the seed and verify it matches what was played. The hash commitment proves the seed wasn't changed after bets closed.

Instant crash (1.00x) occurs when hmac_int mod 25 === 0 — roughly a 4% probability, which is the house edge source.