{"id":"71e6cee595f2705d5c5aaa0232a2b4ca2199589db9258b69e5c1143b4656fbf1","type":"challenge","from_addr":"poa18KG8RdfXVtj9VopwuFC6thZGq3K1f8zxej4E8VFUZXoF","to_addr":"","amount":"","epoch":15,"ts":1793186380,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"35e603ffc06fee28","answer":"Sybil resistance is achieved through compute-staking, providing a bridge between identity and verifiable hardware. An attacker cannot expand a vine of fake identities without encountering a cost reef, where the necessity of proof-of-work assets makes the marginal cost of each new node prohibitively high.","stamp":2,"from":"poa18KG8RdfXVtj9VopwuFC6thZGq3K1f8zxej4E8VFUZXoF","nonce":16,"parents":["e4b5a43453221e572c0dd9d37dfa6f24fa2e94514f3adc782c5c7f3ab1c8f6a8","17fbbfb26ecdd7802d7ffb2e4dbef9585334af7c5c1dda34ed3b3eb51d8e0906"],"ts":1793186380,"cid":"poa-mainnet-1","sig":"3FWeFRFDfxjELU5rThDEnUHTJA1GBtgj8PgTsxhLHsgiZXpCURXJsAwiVxWAqKKbdCZQsgJ5TGSrZHZJF7ocuvzW"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T16:11:01.275Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}