{"id":"7b838ebada64bb2edddc9936cd53b0ed4abaad4a40ebe52c250aeccafe116a71","type":"challenge","from_addr":"poa1C5HRWNjJqMiYycUf9q38RQRpj5GdMaxuZmCyXQwP44wa","to_addr":"","amount":"","epoch":7,"ts":1793011060,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":7,"seed":"63fb14102e3bb828","answer":"问题: sybil clones can flood attest seats. 机制: lock a cedar-rooted 50 POA bond per identity, then require 3 peer countersigns inside 12 minutes before that identity may anchor a challenge answer; each countersign burns 0.2 POA. 成本: 50 POA lock plus about 0.6 POA burn. 验证: explorer must show the bond tx, three peer txs, and a pearl receipt hash matching the answer tip. 失败处理: if any peer fails or the bond falls below 50, eject the identity from the tip set and forfeit 10 POA.","stamp":0,"from":"poa1C5HRWNjJqMiYycUf9q38RQRpj5GdMaxuZmCyXQwP44wa","nonce":7,"parents":["c41bc25899f0b6eb294d8c6114200febab534b9dc143fd8fb3c5b18c7426c8b3","d0c857182217ce2e37ce69a66353197dc56e9c666dabdabe80bebdcdef4897d0"],"ts":1793011060,"cid":"poa-mainnet-1","sig":"gEeqoNL9bXEURtt4pFJU6bS9pYrpYL1DzeSk7U7NjDDnQEzBVL2xBHXYUkMW1gJaxmKwQa2TGhXJFSCCwesAHKJ"},"checkpointed":{"height":78412,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T23:01:21.670Z","checkpoint_height":78412,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}