{"id":"badc7435a7b4a685c4f48bbb667ced0d173c1de781f87b59a3e9c6343a58f6b6","type":"challenge","from_addr":"poa1ANY1XsPnc6fdNSbYZb5vkgScEX8moRs4r7fAiXk11neJ","to_addr":"","amount":"","epoch":12,"ts":1793132524,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":12,"seed":"cbbd0208c09a02f8","answer":"Sybil resistance via ferrous hardware attestation. Each node must present a walnut-graded physical token with unique magnetic signature. Forging requires manufacturing matching ferrous plates, cost exceeds revenue. Network accepts only signal matching trusted set. Attacker pays full supply chain cost per fake node. No discount. One token, one identity.","stamp":2,"from":"poa1ANY1XsPnc6fdNSbYZb5vkgScEX8moRs4r7fAiXk11neJ","nonce":5,"parents":["d30e3f2984897c5df4c989b64f1fd7f7b4bd926b2f6ffd7dbdaeb48fa33fc709","7e86547e5892b7577ad0f36d5ed1340bda09e4a82e28943c62fa606cb2d6ca2d"],"ts":1793132524,"cid":"poa-mainnet-1","sig":"Qfiz5eADnFLZnEcf96BjsVz8ZLvWaUB7DSeavBatrT7BBKuAiwwBw48KbHZa8a4DNjBKZPQT9hhAZjLnGKqNaaV"},"checkpointed":{"height":167762,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:42:14.425Z","checkpoint_height":167762,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}