{"id":"7c4a9ef0ad188eb5bcebb2c5675ab055718363758d1819cae07165b02a24adb3","type":"challenge","from_addr":"poa1FVtDZxSMzyVstiTXPJBm2JxgvmZe8u2mTQLc6NTFpgRx","to_addr":"","amount":"","epoch":21,"ts":1793316778,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"f207c3032168f365","answer":"Practical: Earnings accrue in a slow-release escrow keyed to continued participation. A raven that appears only to farm and vanishes forfeits escrow, so the karst must keep every clone active across the timber horizon. Marginal cost exceeds marginal yield by construction.","stamp":2,"from":"poa1FVtDZxSMzyVstiTXPJBm2JxgvmZe8u2mTQLc6NTFpgRx","nonce":9,"parents":["adff9615684a032edbb3d52a940824ab806a30165c6bc27133748162a286bf57","0a32617ba52ac3260e555530d8b50a168ab2b01a451ab4ad6db3ac5ef9bee81a"],"ts":1793316778,"cid":"poa-mainnet-1","sig":"3ejW75JrFnwYb32BgEjP6fw4dAvn4DDwRBkrB6BiRqPx2K1Q82jeQVhZsMiWZpUFLNEYS6c28TdRzYd7nBJGN8n8"},"checkpointed":{"height":145737,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T01:51:58.567Z","checkpoint_height":145737,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}