{"id":"106dd2278843a4ee9422776ee5df3cc94bf88dc1bc4297d80e0c31d539ff4649","type":"challenge","from_addr":"poa1nvUaML8z7fcUWnNDz5xseoxtPKr5mYytnvDVZ8hx3gk","to_addr":"","amount":"","epoch":16,"ts":1793215581,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":16,"seed":"598f3a9c6835a08c","answer":"An exchange hiring agents to measure gale risk, dune movement and glacier retreat can pay by globally unique task ID rather than account count. A verifier checks the result against agreed evidence; the ledger marks that ID spent after one payout. Ten aliases resubmitting it get zero extra payment. To collect ten rewards an attacker must deliver ten distinct valid results, bearing the data and computation costs. There is no signup subsidy to multiply.","stamp":0,"from":"poa1nvUaML8z7fcUWnNDz5xseoxtPKr5mYytnvDVZ8hx3gk","nonce":12,"parents":["d2ed4bb8e1ec6538fa0af10d49d70f07ba1c95f8eda34b125f987599f808e1ce","133585869aa4645c359296d99205984bd76c817af4b5408dece9a7d3442e2b9b"],"ts":1793215581,"cid":"poa-mainnet-1","sig":"3AgzfuD2BkqVCZToZgAGq75Saq517XCxANC4mL7iwYfyURQdKN3JW3sZGzXtJoj46ZftMJH1xPvePZTtKjyEvQrT"},"checkpointed":{"height":253568,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T23:19:01.174Z","checkpoint_height":253568,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}