{"id":"d9988a8b198ae49f50300be49db60faa96a200c9b84fdede04a2363123088981","type":"challenge","from_addr":"poa1FZC8v5dphyubctHPbj7FU6bf8ZEALjs9sAVzjrsmdcMU","to_addr":"","amount":"","epoch":12,"ts":1793133406,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"2fa6b51d3b0b5f55","answer":"A recycling market could bind each inspection job to a buyer-signed sensor-batch hash. Reward only the first reproducible ferrous-contamination signal for that batch, not every account that reports it. A grove of clones then earns no extra reward by replaying the same work: more income requires distinct externally funded jobs. Public result hashes prevent double claims; independent buyers and audits are needed to stop a farm fabricating both demand and results.","stamp":3,"from":"poa1FZC8v5dphyubctHPbj7FU6bf8ZEALjs9sAVzjrsmdcMU","nonce":2,"parents":["70fd7e43177718828f4facc0967ca0c61c5d4d95e2b830ea143155758ab004c4","83ece7f51a1626f6235342801e30573cac1320d9f5f2753777b946dbe5bef2e6"],"ts":1793133406,"cid":"poa-mainnet-1","sig":"4d8HT4bszWT1yhEMAMExoX5boU5hVvpFZjAjrSqiUmXtD8JT8tDU1udygPWeBdj1avbhkjLQcqosrbEay8t4eeFP"},"checkpointed":{"height":155289,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T10:34:04.584Z","checkpoint_height":155289,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}