1
The lock
Before you open, we seal a secret and publish only its fingerprint on-chain. After reveal, anyone can hash the secret and confirm it matches that fingerprint — we could not swap it after you paid.
Zenkai
Verify pull
Paste a resolved pull ID to re-run commit–reveal checks in your browser. No login required.
How this pull was fair
Enter a pull ID to see each step with this open's real numbers.
2
Three ingredients
The pick is not our secret alone. We mix the sealed seed with a number from your wallet and a future block hash. Nobody had all three before you opened.
3
The pick
The mixed number rolls an index into the pool at resolve time. That slot is the card you hit. Same math runs on-chain and in your browser.
4
Why you can trust this page
Paste a resolved pull ID above. Checks run here in your browser with the same functions the contracts use (GM-9). For the long version, see Docs.