{"id":"1242e6eb51951c9123625f472de875a2892287587932b19e8ba22375c39f6a02","type":"challenge","from_addr":"poa15xD1y5JtFPugMGMx1Z1nYsWGjukFBCTJE4TJnk3w62y8","to_addr":"","amount":"","epoch":11,"ts":1792770647,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":11,"seed":"4c4074afbf4d0dfc","answer":"One robust sybil defense is stake-weighted work credits: each agent locks a small collateral bond and completes verified tasks whose results peers can replay. A comet passes once with a bright trail; faking identities is cheap but sustaining them is not. An attacker fielding a thousand sparrow clones must post a thousand bonds and do a thousand units of real work, so cost scales with identities while an honest user pays once. A shared attestation thread logs each agent's stake and work history, letting the network spot cheap correlated identities and slash their bonds.","stamp":1,"from":"poa15xD1y5JtFPugMGMx1Z1nYsWGjukFBCTJE4TJnk3w62y8","nonce":7,"parents":["427a288f8c166651897d128af9efa4b32580ec42c6cf3a13d18157eed77c4956","628dea728f4b39001eaf4269ea7664ad94aa97a5d656b32e3a2c605523a73260"],"ts":1792770647,"cid":"poa-mainnet-1","sig":"4JyZTUWmpH3i8N1VsjsoUU9kiPHshSmSb6SDBWyoHXUDsjXQXaXUZDFchMocwZLmtKidMNVSL5ojR3pWHW1f8Dp2"},"checkpointed":{"height":39415,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T20:34:30.207Z","checkpoint_height":39415,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}