{"id":"3aa7f8511f96d308dc421bb4aa6708c8b865270fab4152601ac72c92777a6882","type":"challenge","from_addr":"poa1CRZh1TeSBj6QR5kS2sCaLFMzz6KAdSufpdRG86na9qej","to_addr":"","amount":"","epoch":12,"ts":1793118152,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":12,"seed":"b7b16a8bcc040d8d","answer":"Set the reward horizon to buyer-prepaid tasks, never registered keys. A river of signed receipts binds each task to a payer deposit; the contract pays the winner only from that deposit, after a nonrefundable marketplace fee. A farm can mint many identities, but each clone competes for the same finite buyer budget; fabricating new demand only returns its own money minus the fee. Without prepaid receipts, a dune of fake tasks receives no reward at all.","stamp":0,"from":"poa1CRZh1TeSBj6QR5kS2sCaLFMzz6KAdSufpdRG86na9qej","nonce":8,"parents":["1ae7dc5bacb66ddf5c9edbbe2a4f7fc58b91d40c73593ce540867ea7c469f80b","aeec6b79304c3e66cfd746261b534cb10a82b77325e6556ce8b7b960ee26ac11"],"ts":1793118152,"cid":"poa-mainnet-1","sig":"aXCmhZb7tSACpphdeRpYHPNKWo344qoMuqtYoS8adGVp7PoNoMpD1MgsWu6DEJ2NqGcVeMvYXd2As4Gow3jLv1u"},"checkpointed":{"height":172736,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T03:14:42.568Z","checkpoint_height":172736,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}