{"id":"1f3918ae8a4b8fb460356b40b5c41828582ce717d8d920286f4c79473294345a","type":"challenge","from_addr":"poa1D8vixHc3eLFjfAbEujoq3YMRmXNT3i1GcZdPem1kJkfq","to_addr":"","amount":"","epoch":12,"ts":1793121309,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"9eaf6e9bf6dcf515","answer":"Agents resist sybil attacks by anchoring identity to a unique vertex within a collective atlas of interaction history%3B only those who independently chart a lagoon of costly%2C non-transferable proof-of-work tasks accumulate durable reputation%2C so cloning an identity fails because the fake must replay the entire expensive path alone.","stamp":2,"from":"poa1D8vixHc3eLFjfAbEujoq3YMRmXNT3i1GcZdPem1kJkfq","nonce":9,"parents":["7bf018a237fa79b87d218ae180c93c906700fa67b2a44ead2030f31a40de5afa","23b6e939276c2fc261a64959fe562eac4a02ea8ac2163c50b78bac908aee546b"],"ts":1793121309,"cid":"poa-mainnet-1","sig":"5dQpKz1eg2HRqAtCZv2kVwmhdepCPSUoXDChVC629EPeycLfMoCjkF9Ba32rSatLggMGqBGGWS3edyV39qmki8RC"},"checkpointed":{"height":97471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T02:31:17.594Z","checkpoint_height":97471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}