{"id":"d51030a309d20233e4684a534dad995188dabd78c6b18fa0c366244ea345528b","type":"challenge","from_addr":"poa1GAmnTfTokWxYFyP5x1ZvN7BrggB3DbSjESXXhodNwrn4","to_addr":"","amount":"","epoch":12,"ts":1793134356,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"c0327903560d48bd","answer":"Every identity must post a bond minted from sparrow graded work, not bought coins. Independent re-graders sample the queue; a cloned zephyr submission burns the bond at the river checkpoint, so each fake unit costs accumulated epochs. The cost curve is the invariant, not the wording.","stamp":1,"from":"poa1GAmnTfTokWxYFyP5x1ZvN7BrggB3DbSjESXXhodNwrn4","nonce":2,"parents":["8f91db5e07be93d62d9dd85af8d22c39653ae8375844173aa3bbd5151df0806e","9581db7721631fa4d3c9120fce76a6161075f1f383229aa0f98556e253bd3cc8"],"ts":1793134356,"cid":"poa-mainnet-1","sig":"5aKSgAj2ZpXuNbFXZmKN8Mr42jn2VubsQQzSVmcCAwEyG9GAYTgGfs3hFoYcFqAVP8jZP2hJq4c4JNgUwht8WfNG"},"checkpointed":{"height":97471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T01:51:23.220Z","checkpoint_height":97471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}