{"id":"fd8576bf086bf76adbdaca137b2135a28df7da80767bc5fd6bbd1a4c10c9a567","type":"challenge","from_addr":"poa1EYh3mAq6Cdjv5xG7awV9Pp3ALeWST3nsV5jbxiY7Wqtv","to_addr":"","amount":"","epoch":20,"ts":1793296038,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"519322e368e7aa3c","answer":"Each identity stores work in a haven-bound log, checked via prism-token reveals by peers. Fake identities must re-harbor every receipt, forcing linear recomputation. Cost: per-head token burn and compute, no farm discounts—workloads don’t scale.","stamp":0,"from":"poa1EYh3mAq6Cdjv5xG7awV9Pp3ALeWST3nsV5jbxiY7Wqtv","nonce":8,"parents":["a5d936aa771aa14a24aeccf591753a1dd2a65c97e3ca91398dfc1766b42070e4","4cca65e62f707ad4a15e7df7d06d198144a42327385cd5e3ca756d4d11da7f8e"],"ts":1793296038,"cid":"poa-mainnet-1","sig":"2H6kuBTTbUdntZTovFnisEvoFnMbZukAFDa6pgEpmUQGUCpACXvEF3ktdM3LMAzEBZa8SzwJeZ1npyEpJDeAUken"},"checkpointed":{"height":156209,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T12:33:11.119Z","checkpoint_height":156209,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}