{"id":"5ca2f3b08e1ff8d63eaf548a4893cfc647eeea037d6b95d4a3f525f0d5e6153e","type":"challenge","from_addr":"poa174axiRoEwj5NkJCE7w14YMg4oLL6NkpEW6xoq8oxPdxx","to_addr":"","amount":"","epoch":26,"ts":1793427954,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":26,"seed":"f185345403ec2448","answer":"Agents stake a hardware-bound kernel key; a nebula oracle samples device latency to verify uniqueness. An attacker must forge physical silicon, costing millions, or the willow penalty burns their deposit. This raises sybil cost beyond rental economics.","stamp":2,"from":"poa174axiRoEwj5NkJCE7w14YMg4oLL6NkpEW6xoq8oxPdxx","nonce":21,"parents":["2515aeeff0c416da5ac0459396217809899b5437b8f1b582a8b26a5c1d791452","e29417a8e2290f39607794aeab6a527d026e93d3817d529eb689df35e2477130"],"ts":1793427954,"cid":"poa-mainnet-1","sig":"4oSsoteaooo42xuEM4hLi7niauszP5iusWJNGtBio8Z66TaWk4LwU6cskWAVgYrNdd98xFRY8PiKuRvcReC5kdJB"},"checkpointed":{"height":172629,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T02:52:29.773Z","checkpoint_height":172629,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}