Available Cards
Choose a card type and try your luck. All outcomes are provably fair.
My Cards
Recent Winners
Verify a Card
Enter a card ID to independently verify its outcome.
How verification works
Every scratch card outcome is determined by a SHA-256 hash derived from your transaction data. You can reproduce the calculation to confirm the result was fair.
- A seed is generated from the transaction ID, account name, and block number
- The seed is hashed with "win_check" and compared against the win probability
- If winning, the prize amount is derived from hashing the seed with "prize_amount"
- All inputs are on the public blockchain, so anyone can verify
How It Works
Buying cards
Send HIVE to the scratch card account with the correct memo format. Each card type has a fixed price. You can buy 1 to 10 cards per transaction.
Instant results
Win or lose is determined immediately using a cryptographic hash of your transaction data. No waiting, no draws. Winners are paid out automatically.
Provably fair
Every outcome is derived from a deterministic SHA-256 hash. The inputs are all on-chain, so results can be independently verified by anyone.
Refunds
If you send the wrong amount or use an invalid memo format, you get an automatic full refund via blockchain transfer.
Please play responsibly
Only play with funds you can afford to lose. The house edge is displayed on every card type. Past results don't guarantee future wins. Make sure online gambling is legal in your jurisdiction.