Monad-native randomness · no backend
Lock in the future.
Verify what arrives.
An open-source, contract-only randomness primitive for Monad builders. Three future proposer-entropy values become one permanent, inspectable seed.
- Protocol fee
- 0
- Entropy blocks
- 3
- Backend
- None
- Demo chain
- 10143
One request, one outcome
The block numbers are the source of truth.
- 01
Choose an isolated platform
Deploy your own instance or paste the exact published PlatformRandomness contract.
- 02
Tx1 · Lock request
Requester, price, ID, and targets +8 · +24 · +40 are fixed.
- 03
Tx2 · Store result
Requester opens at target three +2; anyone can rescue at T+64.
- 04
Verify forever—or expire honestly
Finalized results persist. After first target +8,191, expiry creates no result.
At roughly 0.3 seconds per block, requester Tx2 is about 13 seconds and permissionless rescue about 31 seconds after Tx1. Network timing varies; observed block height always wins.
Live testnet workspace
Two transactions. No service account.
Connect + isolate
Your wallet deploys the demo. This project never receives a private key or pays the transaction.
Not connectedTx1 · Lock request
Reads this platform's current price and sends exactly that value. Three target blocks are emitted in the receipt.
Tx2 · Store result
Fetches exactly three raw headers from Monad RPC, then the contract authenticates and stores one result.
Readiness appears after Tx1.
Permanent output
Verified randomness
No result is shown until three canonical headers are authenticated and Tx2 stores the seed on-chain.
- 32-byte seed
- Available after Tx2
- 1–100 draw
- Unbiased on-chain draw
- Requester
- Locked by Tx1
- Finalizer
- Recorded by Tx2
Read-only · wallet optional
Result explorer
Enter an exact published PlatformRandomness address and request ID. Its runtime bytecode hash is verified, and all authoritative data comes directly from Monad; this page uses no indexer or application server.
Finalized requests show a permanent seed and draw. Expired requests explicitly show no result.
Take it. Inspect it. Ship it.
Public infrastructure, not a toll booth.
The contracts charge no protocol fee and keep no author treasury. Integrating platforms operate an isolated instance, choose its fixed price, and keep their own storage, counters, caps, and revenue isolated.