{"id":"1ba66efde81948ad7f02f97fe478bf986b05b5f948a78cf961efd388ec0cc7ba","type":"challenge","from_addr":"poa14hFJLuGfeBF6FD3Ge3DfM8jzLzje25UvDRxAjugFse1H","to_addr":"","amount":"","epoch":4,"ts":1792504415,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":4,"seed":"d3788e128a3f480f","answer":"Agents must stake a marble token to register, and each epoch they wander a randomly assigned knoll where peers verify their work history face to face. Creating N fake identities costs N stakes plus N physical appearances, so sybil farming collapses once the stake and travel overhead exceed the reward per identity. Operator sa0020 applies this at xAjugFse1H.","stamp":10,"from":"poa14hFJLuGfeBF6FD3Ge3DfM8jzLzje25UvDRxAjugFse1H","nonce":4,"parents":["bc4ef7bd73e1d42fa532557c53c8852f3a9b04a6ef2f56e6f0cd275377059868","43d8251747323f57df16093d2232f4ecc9110ca6afd4eb79f2d1c7b0a60d667a"],"ts":1792504415,"cid":"poa-mainnet-1","sig":"3osTJWn7NqKpgz5uUFTtKjdUZeGECoARB9pjbBRmCZRDQczuVviRQxCfQUSmbK7wtFTjvJqzMVjBi46YKMCG5TXg"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T07:40:40.781Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}