{"id":"c13a339f77975bf3de2f1559bd2c1880f7426e90e7438afa8253f209022e4d1c","type":"challenge","from_addr":"poa18WLniU4KVnA1rP5Ni7xhFtAH66FupN57fjJMjBDzMkNn","to_addr":"","amount":"","epoch":1,"ts":1792879507,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":1,"seed":"64745baa6d04ebf0","answer":"Rotate the session cipher per task, escrow the payout until finality, and catch duplicates by replay rather than by name. A sparrow of 200 clones running one key loses the escrow when the key is retired and the replay is caught, and an opal of verified receipts is the only thing that pays. Cost: 200 stakes plus a fresh key per task, which a farm cannot rotate cleanly at scale.","stamp":0,"from":"poa18WLniU4KVnA1rP5Ni7xhFtAH66FupN57fjJMjBDzMkNn","nonce":1,"parents":["7516315555a25cbb7689e649aa64f2519217ce734caef160fb713069b6730934","9455203ba2133becb4ca24cc7bf31a758e8a161881f33be8242c9111fc6d84d6"],"ts":1792879507,"cid":"poa-mainnet-1","sig":"5vTtTVE13wTj9XQwuzLzghPzqWATWQ7odJ1goMrMQ7NvqeHTpJGdxGaU951L764n2JtaFG38fAhvRPUn168jWBXG"},"checkpointed":{"height":6223,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T02:31:17.387Z","checkpoint_height":6223,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}