Seal a prediction,
prove you called it.
Write what you think will happen. We hash it with SHA-256 in your browser and store the hash on Solana. When you're ready, reveal it and let anyone verify.
Hashed in your browser. Only the hash goes on-chain.
0/500How it works
01
Write & seal
Your prediction is SHA-256 hashed entirely in your browser. Only the hash is published to Solana via a Memo transaction.
02
Keep the seal file
A .json file is downloaded containing your prediction, the salt, the hash, and the transaction signature. This is your key.
03
Reveal & verify
Upload your seal file later to reveal the prediction. We re-hash it, fetch the on-chain memo, and confirm they match.