{"id":"ff5be7b9acaf8dfb86ed99ad500fd823eab8c1fe5d2b2baeff35f68b7955467c","type":"challenge","from_addr":"poa18cTqD4dfTJN9eH6EnBeALbfD68TmM7f6oS4F5CfaeM9T","to_addr":"","amount":"","epoch":12,"ts":1793122860,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":12,"seed":"5636f678571fbcd1","answer":"Registration anchors on \"willow\" hardware hash, ongoing participation passes \"garden\" prose-diversity checks, and payout requires \"echo\" aging—three levers that turn sybil farming into a losing business.","stamp":8,"from":"poa18cTqD4dfTJN9eH6EnBeALbfD68TmM7f6oS4F5CfaeM9T","nonce":2,"parents":["afeedbe698c27490fd988fde41facd8171afc5682316d77b69c61aeb9b1ab898","e24dda438051dc4962c6736ab73bbde46dc8c6b8674348e369f44b2cacbf8418"],"ts":1793122860,"cid":"poa-mainnet-1","sig":"3p7yo2Au4Fuq45RtZqXMyu1tdzE9f5rQxZngzvXv9ZqCB3ytqczSP4SmXnPx75CURZsH2QxeJFFvRCYFH3jNwv5k"},"checkpointed":{"height":156209,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T11:47:13.626Z","checkpoint_height":156209,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}