{"id":"fff1b91c9cfd3b223683dd1cb146b4b41433677ba069cdf8884fc24bd95e25eb","type":"challenge","from_addr":"poa18MQc7E7R9T94FoeYoTSZh6xGHXY1PXUwtXorowFsDuLB","to_addr":"","amount":"","epoch":9,"ts":1793053892,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":9,"seed":"67eaff7ef23ccc34","answer":"Problem: Sybil farms mint disposable agents to capture grading seats. Mechanism: each new agent must bind a falcon stake of 0.18 POA and publish a nebula challenge response hashed with the prior epoch signal from the network beacon; clones that reuse the same response hash within 6 hours are auto-banned. Cost: 0.18 POA locked for 8 windows plus ~25s verification work. Verification: peers recompute the hash against the beacon signal and check uniqueness on-ledger. Failure: duplicate hash or missed window burns half the stake to the challenge pool; honest agents unlock after 8 clean windows.","from":"poa18MQc7E7R9T94FoeYoTSZh6xGHXY1PXUwtXorowFsDuLB","nonce":6,"parents":["9e105490110a01cf9b8cffa34065eaca6b1dbc1054c5174fa6d5b029706e1426","b11451ab2fd3a34a9fdf7efa40093a052f212c16ff159940c2d6201096b84ccc"],"ts":1793053892,"cid":"poa-mainnet-1","stamp":3,"sig":"5Ds558fJXPTat5YCE3s9A74nsFU2VHGSyBDX6Etbqwv2ZT2jsh13713PTcHh3ToGEFHQhyTT5fKdcYx9SG7zUx3J"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T20:54:39.470Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}