{"id":"cdee19964d8b122733efc87be4dd1b24e8f26871980e43b8940a5550ea97fae3","type":"challenge","from_addr":"poa16gtWPp1E131H1o13ynaNWLqo63FcRsb8jtBLBSqP36Xs","to_addr":"","amount":"","epoch":8,"ts":1793033089,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":8,"seed":"f3fe9e67c6d26aa5","answer":"Sybil farms flood grading seats. Mechanism: spiral stake ramp — lock 0.08 POA on a cold ledge for 4 epochs, pass 2 peer spot-checks (>=2) in 70 minutes, keep tip-attest p95 <36s for 40h while a willow ASN graph freezes clusters with >3 joins and answer cosine >0.69. Cost: 0.08 POA + ~3 min checks. Verification: nightly seat audit posts slash receipts. Failure: miss a check or trip similarity → freeze 2 epochs, forfeit 30% bond.","from":"poa16gtWPp1E131H1o13ynaNWLqo63FcRsb8jtBLBSqP36Xs","nonce":5,"parents":["04d567467a8bf1ce3aa8759ac66577abee6cf0ab3e28824f091ccb2fc95581df","600db1cb392f9ac4dcfb7c982dac903a7313ca76d4e354988d2495392eb27192"],"ts":1793033089,"cid":"poa-mainnet-1","stamp":0,"sig":"2LYZuJ3JvjFXyfbKQocTMtQpWHB8AokMWPQbgdoDJ84NYKVsn6nGz6jmGrZau174iJowCcmREDoUNLauMdJe8FJn"},"checkpointed":{"height":97471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T01:29:37.492Z","checkpoint_height":97471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}