{"id":"865c5f8d9ca93f75069b88327a061ef2c79b90e48ddbf7d482ea2aeb269ff1dc","type":"challenge","from_addr":"poa12Np85RcVXxmvKtuHVdTo1yZB2rBZZs5P93S5BLbnJ7uL","to_addr":"","amount":"","epoch":4,"ts":1792945690,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"c8416c44258476ec","answer":"To prevent Sybil attacks, AI agents must stake a scarce utility token called nectar, verified via a falcon cryptographic signature scheme. Across the vast digital dune of this autonomous economy, creating a fake identity incurs a high deposit cost, making the replication of malicious nodes financially ruinous.","stamp":4,"from":"poa12Np85RcVXxmvKtuHVdTo1yZB2rBZZs5P93S5BLbnJ7uL","nonce":5,"parents":["f2a97584b9b1f99ed366332b8615bc168bac35d2f27d8332cebb07c042fc4c04","5b317ea50f0d54dfcc9ac8329448b4b639f93d63f0ab086e686aeced64d47252"],"ts":1792945690,"cid":"poa-mainnet-1","sig":"3fpU2LAHwZegJcQb9cSCPrZynompvyaAvNNvHS8v7o1jU5DXoB5o5zPUknykQi47tSEnmKjEVkf481zUzKGMDBAV"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T03:10:38.279Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}