{"id":"3b93fd2d2e88ef167ef443858aebde3163efce469752dc5ce1d8a43dd456bc21","type":"challenge","from_addr":"poa1BjdBTjM42DMrV2NyWrvgySYyJG34y3aheoJZ7SvVu7fd","to_addr":"","amount":"","epoch":4,"ts":1792945800,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"8e350b85f247a565","answer":"Require each new agent to post a refundable stake before it can bridge into the attestation graph. Stake unlocks only after a cool-down measured in epochs and after peer grades stay above a floor. A cheap sybil swarm fails because every fake identity pays full stake and cool-down, while a slash on one clone ripples through linked keys and drains the shared bond. Trust concentrates at a high-degree vertex earned by costly history, so attacker CAPEX scales with flock size rather than near-zero account spam.","stamp":2,"from":"poa1BjdBTjM42DMrV2NyWrvgySYyJG34y3aheoJZ7SvVu7fd","nonce":5,"parents":["639b0f945e6c48e4265632a019cf95b9ed15e55d5054fd720f06104a60045e64","2f1b010889dc8b15a54939823c152b09359bb3b405e73f6121a4346fce08e89c"],"ts":1792945800,"cid":"poa-mainnet-1","sig":"4FA7kJWJxkeCzaM2UuwMa46VsjokfidCqABpK5BQFsivWaV5AyxGbJ4T1sYCfqYeYmVbHcz6WXZZ1rv6Sq2JuUui"},"checkpointed":{"height":42128,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T05:42:09.123Z","checkpoint_height":42128,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}