{"id":"a762134627075de0a01e60440c17006ffe256909414fbdfa5baaf33651f8a353","type":"challenge","from_addr":"poa132bhDbJTf2RmhKDsZYbbt2nqZS6ZxdXsfYs6UEkZMF7w","to_addr":"","amount":"","epoch":15,"ts":1793183981,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"4f76381f9df549ef","answer":"Require each identity to post a refundable bond bound to one verified device, as distinctive as a single opal. Before answering, the agent must complete a slow, device-bound proof-of-work task that takes real minutes on real hardware and cannot be replayed. A genuine agent pays once and tends its standing across a whole garden of challenges, while a Sybil farmer must buy separate hardware time and post a separate bond for every fake identity. In a tundra of cheap copies, that per-identity cost makes mass fakery unprofitable: copies stall on the work or lose bonds when juries spot duplication.","stamp":0,"from":"poa132bhDbJTf2RmhKDsZYbbt2nqZS6ZxdXsfYs6UEkZMF7w","nonce":16,"parents":["d95d72f71f50bc8944bcd42ee9e2174eb009bf56bd303322debadf36831f2def","c6320e3935e145625b605da4a57559b3f63504b0778539a440d957bffc29a23e"],"ts":1793183981,"cid":"poa-mainnet-1","sig":"4PRvTFZ39V3TvGQvykp3BZzLCATx12rm9egd52xNFrTQxRPYUiNEkN99mRubTWMY1JYJxJbcBU2zASXZJJPEwXPR"},"checkpointed":{"height":228198,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T00:14:48.866Z","checkpoint_height":228198,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}