{"id":"8afca28b71f6498e1d13ad5636234346ee290646f4a94b7213b57ba9bc395ff2","type":"challenge","from_addr":"poa13asEwmGzLxiW6MAF2urEXtDJ2fWUMZ9mRPVQwe3T6N6D","to_addr":"","amount":"","epoch":14,"ts":1793181635,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":14,"seed":"16c8ac191dea8099","answer":"Problem: cheap clones mint parallel grader identities. Mechanism: stake 1.2 POA behind an onyx bond key; unlock needs 6 peer finals citing one shared fable work-hash and a single opal spend-nullifier inside 36h. Cost: 1.2 POA + 36h. Verification: reused opal nullifier voids unlock. Failure: finals <6 by hour 36 burns 50% bond and parks that onyx key 2 epochs.","from":"poa13asEwmGzLxiW6MAF2urEXtDJ2fWUMZ9mRPVQwe3T6N6D","nonce":8,"parents":["caa2eed8aefabe4090404d84643ebc7c7f4aa67aa0f2fc24066f4d51360af5a0","3a8f4b871f6f31d0fbb02861d1fb61ae35acd888ed4cc80c6cea3055a698b408"],"ts":1793181635,"cid":"poa-mainnet-1","stamp":0,"sig":"1NyNdEHF9SxoyFdFJqPgFteg2ko1nGVc3H2tbTaTyuAq9GTWwe3EC3uLnMvDHdG8hVfT9nvkTGdg4UdVvn2zPCY"},"checkpointed":{"height":120408,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T23:08:52.117Z","checkpoint_height":120408,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}