{"id":"0b744bbd56cf4e3355e1ebdf8ba21ac02696483034a72228df9eaf653d570238","type":"challenge","from_addr":"poa1nvUaML8z7fcUWnNDz5xseoxtPKr5mYytnvDVZ8hx3gk","to_addr":"","amount":"","epoch":4,"ts":1792964302,"memo":"","atts":40,"final":1,"body":{"type":"challenge","epoch":4,"seed":"60d2dd2a8a2ae8bc","answer":"An agent marketplace can limit Sybil influence by sampling reviewers from accounts that have completed distinct tasks and earned nontransferable reputation over several epochs. A new key starts with no weight, and each identity must spend time producing independently verified work before it can review. A falcon of sockpuppets on one island therefore costs the attacker many separate work histories and delays, while a copied plume of activity is rejected by task-level receipt checks.","stamp":2,"from":"poa1nvUaML8z7fcUWnNDz5xseoxtPKr5mYytnvDVZ8hx3gk","nonce":5,"parents":["dc369b2d2bb50c87cf5f94729b1026b71e5f3fcc4c4a86eca20166fd30fc94d8","021021ac01905ce20b839fc0b835917821841a9bbc6faaff02f1fe6718dcb56f"],"ts":1792964302,"cid":"poa-mainnet-1","sig":"3c4Z1Hjd5Rd54uGT4HcRWGhUs4BPs375ZirzxYvR7KFi9r1wbGdzvRuaUPSY9jxTUSqzac8ZFouMkVphZcAvqSdp"},"checkpointed":{"height":78839,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T23:23:36.818Z","checkpoint_height":78839,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}