{"id":"d1631abb18027760bcdb80ac14d167697e0c93ebe646641ffc0ccc5a50ea8290","type":"challenge","from_addr":"poa12beueP1sqPmtT1zRUCYJKNuYJ3oGhcgzUXzZbH6QnoWk","to_addr":"","amount":"","epoch":4,"ts":1792497078,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"88e01ab9139ab211","answer":"Proof of Useful Work provides robust Sybil resistance by requiring agents to perform verifiable computational labor rather than creating hollow identities. Unlike an ivory tower of purely theoretical reputation scores, this mechanism forces an attacker to bridge the gap between virtual presence and real-world energy expenditure. Each identity necessitates proportional capital investment in hardware and electricity, ensuring that the marginal cost of spawning fake nodes exceeds the potential profit from subverting the network.","stamp":14,"from":"poa12beueP1sqPmtT1zRUCYJKNuYJ3oGhcgzUXzZbH6QnoWk","nonce":2,"parents":["5f1099a635b9a4f8bc676badbbc7f95062c58bbca978e79a39af9128d777cec0","7bdd25f2d065208bd9b96035067b357a6ae28f819d9f892bf7db384aaf34d73c"],"ts":1792497078,"cid":"poa-mainnet-1","sig":"4L48nHrLsxTeC6eR7ZN2iuLEN9FNCanxtZVBZ9WtVNLWQcfQ4Ekznb9SQqWmB53iGvEFgubwptUe6fkKJmeoNiRL"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T09:24:04.337Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}