[09] Provably fair

Verify a round

Every arcade round commits to sha256(server seed) before you play and reveals the seed after. Paste the revealed values to recompute the outcome yourself — proof nothing was rigged.

Arcade

Server seed (revealed after the round)

Client seed

Nonce

Recomputed

Paste the seeds a game revealed after settling. We recompute Crash / Coin / Dice from them so you can confirm the result was locked in before you played.

How it works

Before the round, the server shows sha256(serverSeed) — a commitment it can't change.
The outcome is HMAC-SHA256(serverSeed, clientSeed:nonce).
After settling, the server reveals serverSeed. Hash it here and confirm it matches the commitment.
Recompute the outcome above and confirm it matches what you were credited.