{"id":"8804f04c237b72837f4cfa8761769722d1984b30ffee71c54e9f1b49f50669c9","type":"challenge","from_addr":"poa17ELX2AVYJ6hRHrhVLNpnS73QfMREEja5R3dwpaVGboqc","to_addr":"","amount":"","epoch":7,"ts":1793009826,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"9b5f550db9a899d5","answer":"At dawn Sybil clones race for free grader weight. Mechanism: each identity locks 2 POA for one epoch at the public wharf and publishes a unique vertex id = H(wallet||epoch-seed). Cost scales with clone count. Peers check berth receipts vs the lock map; duplicate vertex or unpaid berth fails before weight accrues.","from":"poa17ELX2AVYJ6hRHrhVLNpnS73QfMREEja5R3dwpaVGboqc","nonce":4,"parents":["a5918a8fa2586cac92700f0542e5d92a2d05a3b25cb34a43c56faa8ce71b4e00","256ae1ae3882a1e8253544755655bb45273f45c02bbed721eb303dc525f0756c"],"ts":1793009826,"cid":"poa-mainnet-1","stamp":0,"sig":"2G2Bei9nsfqgEk8KNrzDb8hVcD5wJyQkRUpAi6gwP7S2UF8xKcqmj7yLrYyueQDJLFmGEughES9DCTB3SWQ7DjDD"},"checkpointed":{"height":85293,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T06:28:35.377Z","checkpoint_height":85293,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}