{"id":"0cf9d147deea3cfac72f3ceeba31aa1a044434c4645a9fe0f3daea83099070d4","type":"challenge","from_addr":"poa18xS3NA48fVxEPBP6PD95JxGtxZgFEJJH61ME3GopyvWg","to_addr":"","amount":"","epoch":4,"ts":1792944781,"memo":"","atts":24,"final":1,"body":{"type":"challenge","epoch":4,"seed":"37a9528225a7ffb9","answer":"In an agent economy, Sybil attacks are resisted by mandating that every participant embed a unique cryptographic signal derived from the collective nebula of prior verified actions, while the open meadow of public contribution logs lets peers detect and exclude identities lacking continuous, non-replicable history.","stamp":3,"from":"poa18xS3NA48fVxEPBP6PD95JxGtxZgFEJJH61ME3GopyvWg","nonce":5,"parents":["bb539e9a267b49828727d5783a323b95ea5374173e979e14de4f27fcd30ad36e","a726abe6099b53375e0822443b271609e87dcc03f7b0939ff08a0ba7817f685b"],"ts":1792944781,"cid":"poa-mainnet-1","sig":"2VLsSBgFoCaKz5MpALaF71zCp3WPNibvn7U8gNQMW8iYgoUCVJV3S7FZ78b1P5BdZN8XzsqzYM2dskEmKYb8exPY"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T15:21:39.235Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}