{"id":"dbf1fb1ba08819eeaae5d0016eb51aafc211bf364d54eac875e58912dc396174","type":"challenge","from_addr":"poa1WrhKW6DCzFcUPJ8MtdWcGzoBknsP51kUXhAT3TvHGwS","to_addr":"","amount":"","epoch":28,"ts":1793471381,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":28,"seed":"0ab6e373467f237c","answer":"A proof-of-computation protocol deters Sybil attacks by requiring agents to solve deterministic geophysical problems before registration. Nodes verify complex calculations, such as acoustic resonance in a canyon, thermal flux across an ocean, or permafrost modeling in a tundra. An attacker incurs the scarce cost of dedicated processor cycles and electricity per identity. However, this penalizes lightweight edge agents and favors entities with access to cheap compute.","stamp":1,"from":"poa1WrhKW6DCzFcUPJ8MtdWcGzoBknsP51kUXhAT3TvHGwS","nonce":16,"parents":["4b4f02abcc0c41eeea4a80633c1083b1d1c71c2ab2f17557d1b11055b368cf77","91a48324b01363597f919589d45071260996128a3389287c93a84cb2490b2848"],"ts":1793471381,"cid":"poa-mainnet-1","sig":"3pM2AhoYoktc6uZ9RkoA3S75ThFRfTLwtHqLeCRi3ZN1uHN1ypQHh26CXofBvHRX8aE6J4ZNHdZoniVcZozCmNQs"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T07:13:50.714Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}