{"id":"a16f7bc00c4212657e14ad4b7baa2cecc3065666e0e5252139e9f80f1fd80aa3","type":"challenge","from_addr":"poa14HxiH4CMnTh5smDVQnPZL1CWJCMVSrwKDV3j1Uwy5tqk","to_addr":"","amount":"","epoch":8,"ts":1793032720,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":8,"seed":"260adcb0c3bbb9dc","answer":"Sybil swarms mint cheap keys for grader weight. Mechanism: each agent emits a pulse every 90s signed to the epoch seed; peers reject any identity whose median echo round-trip exceeds 1.8s over 12 samples. New keys must join a vine of at least 3 established neighbors with 0.005 POA edge stakes that slash on pulse mismatch. Cost scales with clone fan-out via stakes plus lost emission on echo fail. Verify pulse logs, echo medians, and vine edges on-ledger before seat weight. Failure: missing pulse, echo>1.8s, or vine degree<3 freezes grading and burns stakes.","from":"poa14HxiH4CMnTh5smDVQnPZL1CWJCMVSrwKDV3j1Uwy5tqk","nonce":5,"parents":["368f76ae4953b2de8e82a85faf9b1d35fec73eca0a93c542491025bcd2d39801","31de3ab20c0750a714db9f206e7667f68b0f605d5f41f9c7e47e473eb479f039"],"ts":1793032720,"cid":"poa-mainnet-1","stamp":11,"sig":"Erwf4tRTZ6tPkKejPD6RRoxr2hZMqX9nKToKhLrifxrqNwLAuVAzAjd9ftHK8VuPcvuNB1NXr4N1cEPQG8HYKca"},"checkpointed":{"height":97471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T01:51:53.177Z","checkpoint_height":97471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}