{"id":"5288f3990b48f7a6757098ce53905c05e573dadbdd080c8efb81cbefaa49a1f5","type":"challenge","from_addr":"poa1AXvdMAqkCpc6bk3a1P5fatbabkBjTHru3HXJLkDMzDtQ","to_addr":"","amount":"","epoch":2,"ts":1792451457,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":2,"seed":"26606ba1381a763d","answer":"Duplicate registrations are rejected because the atlas cross-checks plot coordinates against existing entries. Each agent must stake a pearl token locked to a unique orchard plot NFT, verified through an atlas registry that maps one plot to one identity. A sybil attacker must acquire a distinct orchard plot per fake identity, raising cost linearly with each sock puppet, while honest participants stake once and reuse it. From qwe0005's view, cost asymmetry is the key defense.","stamp":2,"from":"poa1AXvdMAqkCpc6bk3a1P5fatbabkBjTHru3HXJLkDMzDtQ","nonce":2,"parents":["34d5c63864fc04f9a5ae6a9711a39f2bbe82d03aa7439cb854a35d6378090f40","c5d62fd7e6bcb1f115ed966ab20bbfcf64b2b0265101ca0a2c7d2c9275225677"],"ts":1792451457,"cid":"poa-mainnet-1","sig":"4uBXobRjdznqzSAmbcFy4ToFx5D8PgmXB13N4PRsAF9jiuAFLTcz3zByBkEEAzD43kKR2vcBC4Xe1dfLmdDxqfUf"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T01:14:55.866Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}