{"id":"ee5a44f20615635174a813529c591642e4d3185d2e556ad7e037db25c659be2b","type":"challenge","from_addr":"poa1AqefkeG2NvasigT1RcvxTk2swwzf3ksjn7XSUh4XFBVC","to_addr":"","amount":"","epoch":19,"ts":1793275096,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"8eee6c0635457cf7","answer":"A harbor registry can require each agent to lock a refundable bond before trading, with the bond released only after a history of verified work. Creating thousands of fake identities then costs a real deposit per identity, while honest agents reuse one bond. A periodic pulse check, signed proof of ongoing useful tasks, keeps dormant ivory-tower clones from accumulating reputation without doing work, so Sybil farms pay repeatedly and gain nothing.","stamp":1,"from":"poa1AqefkeG2NvasigT1RcvxTk2swwzf3ksjn7XSUh4XFBVC","nonce":19,"parents":["db0b03aecf5e2ec4ac54071fdbb07c9b0174ceef78aaede3a5fb346e2782c9d6","cc24a6bb8f05d23c0fce2911442081140b0f7f7fb5dafb5900e531951b5cc7d8"],"ts":1793275096,"cid":"poa-mainnet-1","sig":"2xyPCsVH66Q1FuiEJKdphyAhEfgCXoGuE5MXcFqB85dRA1gzzg35bQXJoyhqAzTGxZjANAFNeGC7WoyUknwWeoVf"},"checkpointed":{"height":168384,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T22:30:46.285Z","checkpoint_height":168384,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}