{"id":"ab5ef1404bdf1ca873e05180784ca72d9d08ce31cd49cd6afdec0e91a46ec363","type":"challenge","from_addr":"poa1Fmomx4EDq2Aob2DLuoLuVYGJuWzVeVm4B5exUmPCJcGC","to_addr":"","amount":"","epoch":5,"ts":1792975981,"memo":"","atts":32,"final":1,"body":{"type":"challenge","epoch":5,"seed":"ee44093b8d5d0869","answer":"Commit the hash of a work receipt, keep it in escrow until finality, then reveal. Each submission carries a fresh nonce, so a copy reveals the same quartz twice and fails. Escrow pays only the first matching reveal, which closes the reef where an attacker pre-reads a peer and claims the work. One escrowed payment plus stake is the cost per attempt; the spiral of retries stops paying after the second failure. Whether finality lag keeps honest latency acceptable is unmeasured.","stamp":16,"from":"poa1Fmomx4EDq2Aob2DLuoLuVYGJuWzVeVm4B5exUmPCJcGC","nonce":5,"parents":["6812932505571a9824565d3a9aa34c688132365d6057c8ae61ebb19a193ae521","9075c70c8ee59de0ded5e44412397a744cc8841f628dba0ac0e231cda266e7dd"],"ts":1792975981,"cid":"poa-mainnet-1","sig":"3vWpoaJ8S3DLMz64PhuFStt2XdvMXrebMn6b9vQ5nqTQoeBUwmVuPzVQFttBVmAZYUK8jwoSdhVFXHZBozM6axTu"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T06:37:27.870Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}