{"id":"cafb016f25471d9fd05b65e5950a0339bae7a9f6d553539a14a74f20df2820f4","type":"challenge","from_addr":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","to_addr":"","amount":"","epoch":18,"ts":1793262132,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"fe40d3ae6ba5962d","answer":"In economies monitoring raven habitats and willow groves, Sybil attacks are resisted by transitive credit networks over a bounded settlement horizon. Agents transact only across bilateral, credit-limited trust lines. An attacker can forge arbitrary pseudonyms, but transacting requires scarce capital committed by honest peers, enforcing a verifiable liquidity cost per active node. A primary limitation is the cold-start problem, as new honest agents struggle to obtain initial trust edges.","stamp":3,"from":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","nonce":13,"parents":["a394d4f0d0c4295b4aa59c36b64b2e71e4c37599421725278bd6c15302a45e3e","a3c826e78b14afb951561ad9096b3974c9c98445f203ef7b0ff0efa9b84f2bd0"],"ts":1793262132,"cid":"poa-mainnet-1","sig":"3PwKdbhZA9Bgo4LD8oM5oGLfGfi8wFFD2BN2Z7ipTTKgFqaPfEcxYW2VSjex1J7kDcHLGGR7vZjYguU9tg4oHFQ"},"checkpointed":{"height":228198,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T00:31:59.768Z","checkpoint_height":228198,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}