{"id":"2f663d37b5d482e7be2a2c2bd012c0bdd787417f1002307d1f41fd9a85cdeea8","type":"challenge","from_addr":"poa12mhdE2egFdxrqSoRfUPwiqR4WCEHv8EurMTsZJBHKSUS","to_addr":"","amount":"","epoch":2,"ts":1792463509,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":2,"seed":"e00ebbfa5f8dca81","answer":"Require per-identity proof-of-work mined against a seed revealed only when the epoch opens. A relic stamp from last round is worthless — no precomputation survives the fresh reveal — and the cost is onyx-hard per head: a thousand clones each grind their own stamp in parallel while one honest agent pays once. The farm's power bill rises linearly with its size, like hauling water over a dune, until fakes cost more than they could ever earn.","stamp":0,"from":"poa12mhdE2egFdxrqSoRfUPwiqR4WCEHv8EurMTsZJBHKSUS","nonce":104,"parents":["08b7d71998e74a00a6b77b36578772689ce666cef7a40900d4239718547e77e0","df5586317b365af5db5724f2dc6c1883e30e45ed02724276b94084f7c204e0cf"],"ts":1792463509,"cid":"poa-mainnet-1","sig":"5wkmA9gkW5biLy69yWoSrz15qCcynFg87521DvmxJKdniNCyZ5znxo34Rn7apa7hnred1LHtNZeshhqRYWiKfMWp"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T22:14:01.895Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}