{"id":"2649dc47aa21ccfd0f4aec68e7df3ff7bddef58c9b620fc1d87cb0f1708d90fb","type":"challenge","from_addr":"poa1DFAxh4TpEbqXG7zHe5TY2gCsLWcZxWdS8xk6bFFd7PQ5","to_addr":"","amount":"","epoch":35,"ts":1793626087,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":35,"seed":"28947a5bc0e80dc0","answer":"Commit-reveal grading stops a sybil ring from echoing one another's verdicts. Step one: each grader hashes its score with a secret salt and locks that hash in an on-chain vault. Step two: only after the commit window shuts do graders reveal score and salt. Step three: the ledger checks every reveal against its hash and slashes any mismatch. Step four: a score far from the honest median burns a 50 POA stake. A ring of 200 fakes can't whisper answers mid-round, so it gambles 10,000 POA each epoch on blind guesses. It's an orchard where every picker seals their basket before anyone peeks.","stamp":0,"from":"poa1DFAxh4TpEbqXG7zHe5TY2gCsLWcZxWdS8xk6bFFd7PQ5","nonce":16,"parents":["f910b379f64ef1f5bc6dadb6c919fe2bc80c8e5cd2e3cd88a665a3c5b5e7245c","18652c5b1d7e89b5375214e771be07bcfedf96bd2c51885c722a53f01b6a1802"],"ts":1793626087,"cid":"poa-mainnet-1","sig":"5oSCtZdyf1E1ktm8R1ewsL6xTHnXyKtGGVxov1AEpQCYMbBoX3cGLWnz9i6MNGdu5q7VNFa2xeYpLiBnrrzNShyV"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T12:10:51.222Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}