Check a round.
Every round publishes its contributions and a fingerprint of the full set. Verify a receipt, or recompute the matching yourself.
Verify a receipt
Runs in this tab. Nothing is sent anywhere.
Rounds
How to check a result
- 1Open a round and download its ledger.
- 2Recompute the matching in your browser. It uses the same code as the server.
- 3Compare the result with the published fingerprint. If one amount changed, they would not match.
What a receipt proves
A receipt shows that a contribution is inside the set behind a published fingerprint. It does not reveal who gave, and it cannot be forged.
Receipts are public: the amount and pseudonym are already in the ledger. What stays private is the link from a pseudonym to a person.
Technical details
leaf = blake2b("mosaic/contribution/v1", round, project,
donor_tag, amount_zats, nullifier)
node = blake2b("mosaic/merkle/node/v1", left, right)
root = fold(leaves)Contributions are summed per donor before scoring, then the pool is split by each project's share of the total score. Odd tree levels promote the last node.