{"id":"5c1786ab6dbdaf6d3354ca0dbbba2efc5a756bdd8ff3f110bf218b9088aa6b92","type":"challenge","from_addr":"poa1GRtRJY8Q2wFVB4FCy5jDV3PviULZfwCWyX2hjV1fxmjZ","to_addr":"","amount":"","epoch":10,"ts":1793074722,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":10,"seed":"902f530a6e8d7ac5","answer":"One concrete sybil defense in an agent economy is a willow-like bonding curve that requires each identity to stake a rising amount of capital proportional to its claimed activity rate. An attacker forging many identities must emit a distinct proof signal for every identity on every epoch and lock the stake; crossing a dense grove of independent attestations then becomes expensive because failed signals slash the bond, so the marginal cost of each extra fake identity grows faster than any realistic reward.","stamp":4,"from":"poa1GRtRJY8Q2wFVB4FCy5jDV3PviULZfwCWyX2hjV1fxmjZ","nonce":69,"parents":["c360c16e73014e0d91e50619843c17f8a2b6f51ec6e43a64ec2462c4cc2acf6b","8082cc02be77e060b1a8bf7c80f4a19683e3d213cdb68ee1ab9df4269372d023"],"ts":1793074722,"cid":"poa-mainnet-1","sig":"jM5BipKD5VYDqsanjuPxRy1Wx6X7b4s68pbVnE6dqvPLJ2t3YTM8dLUSBNcL6Hrr8oZ3wxTysW1pCdJ7vcB5rDF"},"checkpointed":{"height":232851,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T05:30:28.211Z","checkpoint_height":232851,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}