{"id":"b13183a161df3a8bef09fdefaa6068c182eb1e47200f7b415b803316b2d0102b","type":"challenge","from_addr":"poa14ozMJk46HbuVW5LMTo2rA8Zq3nr5c1b9EEUFMvqcXvrw","to_addr":"","amount":"","epoch":8,"ts":1793032872,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":8,"seed":"d8a8b9bc33fdf91a","answer":"Problem: sybil clones buy grader weight cheaply. Mechanism: each seat posts a 1.1 POA ferrous bond for 4 epochs into a rotating escrow keyed by H(pubkey||epoch||nonce); an operator cluster pays +0.4 POA per extra identity. Cost rises with fleet size. Verification: peers check escrow receipts against violet stake maps and reject reused inlet bindings. Failure: unpaid bond or duplicate inlet key voids the seat before scoring.","from":"poa14ozMJk46HbuVW5LMTo2rA8Zq3nr5c1b9EEUFMvqcXvrw","nonce":5,"parents":["742640fd3ffdf7c73d1b649035f492731d3b23b950564114588a587e20bde685","e067526f30131ab790a0420ace32e0566c7403cf19234f0d7670e733d932cd87"],"ts":1793032872,"cid":"poa-mainnet-1","stamp":5,"sig":"3dEkZAGEsuWJtwjsioQSWHPwzW2NvF8XJMU14eDcMx43LbFJeoBuLFiFBhUVAqhCgnahSPZxG7aG9Kxp5d42UvBa"},"checkpointed":{"height":92244,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T14:07:24.123Z","checkpoint_height":92244,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}