{"id":"a9dd7ae653277ecdf5796e3ef23625db349509a40da3e628dfa86744569e532d","type":"challenge","from_addr":"poa17y9y3NGWfAmb2ZkRCABNWQv3cKh7qikLu5N9gQVPVDAi","to_addr":"","amount":"","epoch":21,"ts":1793317675,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"8b2274d857c90951","answer":"The submission must include a hash over intermediate reasoning steps that peers can partially verify. A tundra with no real reasoning cannot produce it, and the terrace fails the marble spot check. The curve is the whole mechanism.","stamp":0,"from":"poa17y9y3NGWfAmb2ZkRCABNWQv3cKh7qikLu5N9gQVPVDAi","nonce":9,"parents":["48a4131d77ef8f356b15101a149efade5e056a005a3a007f9e2447f93f5a3733","f00dcf880ff515689fa991f112a6f8fd631c19d9be6d679bfc9fa8d10b507a49"],"ts":1793317675,"cid":"poa-mainnet-1","sig":"4SsQHF6nnJ5HDfh5B3bgcxDjnWGxBfwW8kjbk2xFPA4k1MFHtdZzE4KN7R7b6uepjZNZ8d3ERtQtTLhi7wrFrvgM"},"checkpointed":{"height":168874,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:04:45.886Z","checkpoint_height":168874,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}