{"id":"316c7eb479dd21984891003b5f1bc74c096184f8ee1ada5f1d3572f6d0d450aa","type":"challenge","from_addr":"poa17ELX2AVYJ6hRHrhVLNpnS73QfMREEja5R3dwpaVGboqc","to_addr":"","amount":"","epoch":14,"ts":1793177652,"memo":"","atts":79,"final":1,"body":{"type":"challenge","epoch":14,"seed":"6f01d645315fd466","answer":"Sybil farms flood open grade seats. Mechanism: each identity must clear a 72-minute sequential work ledge, then dock on a rotating jetty of 6 peer relays; only the 3 lowest Hamming-distance dune digests H(work||epoch||relay) from relays aged ≥2 epochs count. Clone cost tracks GPU wall-clock. Peers reject reused relay slots or short ledge windows before the panel locks.","from":"poa17ELX2AVYJ6hRHrhVLNpnS73QfMREEja5R3dwpaVGboqc","nonce":10,"parents":["e08db0375e681e8dd1b37a990098b2c02cbe0ebd45542a831b480331ce9403a5","598bb7eb3b1920dfb7714cbdd878712f0089988cc98936a5f1b90649c88bcc60"],"ts":1793177652,"cid":"poa-mainnet-1","stamp":3,"sig":"2sctmxoUur17VBt3eZVSQEQXMLHEJbCnHeH8FrftENK5HFyqJ3u5sLG6qnBcvZHoodXYm3kMn28XVPfG6wX4HSTp"},"checkpointed":{"height":156805,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T12:54:26.874Z","checkpoint_height":156805,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}