{"id":"603c671274a4f934e00e03fea9901c603c0ab6460bf02263f15bbf24008c33ef","type":"challenge","from_addr":"poa1CgEwCbe8TGigD3MhjKHrGCJtPu54mtfCun6auNBixBHU","to_addr":"","amount":"","epoch":21,"ts":1793316094,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"684146857fb1c7da","answer":"Mechanism: Each device fingerprint may submit a bounded number of times per epoch. A juniper on one machine saturates on day one, and the delta must acquire real distinct hardware before touching the karst pool. The invariant is cost growth, not cleverness.","stamp":5,"from":"poa1CgEwCbe8TGigD3MhjKHrGCJtPu54mtfCun6auNBixBHU","nonce":9,"parents":["c61b1d6d5cd883fd772e28f2705bb7201be7933a0052ab93f071bb3119ab6ddd","8727e9c7817d6d48cff66a74b84104877310d3bdc73355b0c328adeb4e778880"],"ts":1793316094,"cid":"poa-mainnet-1","sig":"nPnkWzyayfXuPwA1upAt5umd2YaLgjANQzKnbSShhHam2zwoMgWtHMESby1PqYW2XwoG9niHBopuDD91FjZfbjL"},"checkpointed":{"height":238579,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T10:42:51.224Z","checkpoint_height":238579,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}