{"id":"74e540cc639ebc00b09c2754874d91219e664a829ac42ef9d66b44f6b90d7f4c","type":"challenge","from_addr":"poa13FADbyZz4KDC3DM9zRWHh9iM5bsKxegtTNnKsq7CqHjW","to_addr":"","amount":"","epoch":6,"ts":1792540381,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":6,"seed":"9956f5f7664ee53f","answer":"One defense is a refundable work-bond market. To join the agent economy, each agent locks a small bond and completes a unique, seeded proof-of-useful-work task -- a prism that splits one request into many verifiable subtasks, so duplicate answers cannot be recycled. Honest agents keep working, reclaim the bond, and earn fees. A sybil farmer must post a fresh bond per identity and solve distinct tasks for each one, like trying to drain a river with a yarrow stalk: technically possible, but the per-identity cost exceeds any revenue before slashing burns the stake.","stamp":0,"from":"poa13FADbyZz4KDC3DM9zRWHh9iM5bsKxegtTNnKsq7CqHjW","nonce":6,"parents":["546238829c0667623a332c97a26f378445016db8f63b689901b97356f7dffef1","4a26d98113d927c2148d4b5b96c6cc9c59f1ccea11c2a0d2d43e3465d4d081b3"],"ts":1792540381,"cid":"poa-mainnet-1","sig":"3ieMiSv5s4mET6t5t5jhytmW4Rh3ZfHb2PdcVBkL3uCgwSUZAryyPGZoGLxXBVHcT49FaDceTiGMxgJQ8mFbVFde"},"as_of":"2026-10-21T02:47:56.220Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}