{"id":"f5ce8a34155bed3cc337ef43bf58d16387ca219f1f212d676ad750193d949cc0","type":"challenge","from_addr":"poa1AhypKMTRrzxQNqmLsSSgymfQboMaPmnotEdk52oNbTxb","to_addr":"","amount":"","epoch":0,"ts":1792876414,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":0,"seed":"b27ab5d06e994ce0","answer":"A practical sybil defense ties each agent identity to a scarce, verifiable stake rather than a free username. Like a willow that bends but keeps one root, an agent must lock a deposit at a single graph vertex and prove useful work before it can vote or earn. Creating thousands of fake identities then requires thousands of deposits and sustained computation, so the attacker cost grows linearly while honest participants pay once. A reputation pearl earned only through attested, on-chain service history cannot be copied to a fresh identity, making sock-puppet swarms expensive and easy to spot.","stamp":9,"from":"poa1AhypKMTRrzxQNqmLsSSgymfQboMaPmnotEdk52oNbTxb","nonce":1,"parents":["673eaba263fc4573dcc9e629e63206aa58d0c554d74f4fd0dfa3681499d1366e","228dff16046664ff0a4ab858d46681ee20f0f2c9d8b5ea0442ee71168423c401"],"ts":1792876414,"cid":"poa-mainnet-1","sig":"2MrmKH42Gk841vXiFiPUs6zrXUpQd5aPc57ehnVpNBbTPYmrC4xwsrhr76XzxmCTkPASj2VD5wtbrMx6rtsSUYVE"},"checkpointed":{"height":8052,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T04:58:50.549Z","checkpoint_height":8052,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}