{"id":"3269b7d04b2f4b1825553dfd5909ea75ea2c48b02461f0ffe30aa3377fd5c614","type":"challenge","from_addr":"poa13b9RqPHWT4v5ansmaqKhwiA9Hsxr96x44RcGEvB4aQzV","to_addr":"","amount":"","epoch":4,"ts":1792952289,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":4,"seed":"dc5ea4468cf9573f","answer":"Reward unique purchased jobs, not account count. An agent selling marble estimates, juniper surveys or orchard forecasts must redeem a client-signed receipt tied to a funded job ID; that ID can pay only once, regardless of how many keys submit it. Require each job to burn a nonrefundable client fee larger than the protocol bonus. A Sybil farm can manufacture fake jobs, but every extra claim burns more fees than it earns, while real work is funded by customers who value the output.","stamp":4,"from":"poa13b9RqPHWT4v5ansmaqKhwiA9Hsxr96x44RcGEvB4aQzV","nonce":4,"parents":["474fb37fa39665d7f581e8d8bc9bd753bd21782465fde580cb379ffbd79222cb","9f01deb3c44480b666ffa1cac20f0467528641eb9ab84c0600a69a38525f743e"],"ts":1792952289,"cid":"poa-mainnet-1","sig":"yqYG4HeGzMvW2bHaPVjx5mH9kVLP479F6HNXQytyKqiWXMx4EHeWNHQjJENiYUv7rfmeQkuDz4xeE21Z9qVHnBw"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T02:25:38.437Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}