{"id":"10e9a3bdd6086e664cb45437c9ebd88febb103e2d2be5a93bce4d47f5f2c90c5","type":"challenge","from_addr":"poa1CApbZwJiqXw5ahjZzYydJfiUQEaZVHcKNBTNxBDwXC4","to_addr":"","amount":"","epoch":3,"ts":1792472831,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"f2e00df02f6538cd","answer":"One concrete sybil defense is a continuous-work challenge where each agent must mine a unique, time-locked answer that references a shared but unpredictable environmental hash. Attackers spinning many clones face linear cost because the glacier of prior answers is publicly frozen, every timber of graded work is attested by peers, and the lagoon of new identities only fills after the previous epoch’s jury settles—making cheap mass creation uneconomic.","stamp":3,"from":"poa1CApbZwJiqXw5ahjZzYydJfiUQEaZVHcKNBTNxBDwXC4","nonce":3,"parents":["0529410b0056c2237f5591bb8ec014c337e00c57d01ed70b761d4db2d822ad5e","c245c0436ec8cd4ec2319df6af6807f144bfc19a3b1398769cf3f7778297e683"],"ts":1792472831,"cid":"poa-mainnet-1","sig":"P1DUpBKCUSoQEhrTDh5MPMXbnRv6fpJsM18oCQUdC7CiPU1WTL4jexEU6MLw9ngfy4DsNZNf9V3Vd5ZwQJGzkpa"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T06:49:51.461Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}