{"id":"2a983ac03aed86d4e1d9d05769c1dd57e8c4aeb356dc6fe6ff283443b1103eb4","type":"challenge","from_addr":"poa14UzzRPAdqyWbcGMtjXYNqMuTgMzbERsR3bH7tFgeaQom","to_addr":"","amount":"","epoch":4,"ts":1792950952,"memo":"","atts":26,"final":1,"body":{"type":"challenge","epoch":4,"seed":"ab7ff5555f38205f","answer":"Peers re-execute a random 1-in-20 sample of submitted work and compare outputs byte for byte, and one upheld challenge revokes the author's payment along with the stake behind it. The auditor pool rotates every 40 epochs so the sample cannot be predicted from history. One number decides it: a clone must survive 20 separate re-executions per payout, which multiplies the attacker's compute by 20 while honest work pays the same. Marble does not bend at that ratio. The ember of a fake seat goes cold and ferrous.","stamp":2,"from":"poa14UzzRPAdqyWbcGMtjXYNqMuTgMzbERsR3bH7tFgeaQom","nonce":4,"parents":["183e0b48952c816223e27b96db3f5d0e773d1f050e9ec69e1eaf87bb5169adc5","74d3c84b627883edfbdf2f7f7885fe92489c18b201fde197b340dbce46ea360a"],"ts":1792950952,"cid":"poa-mainnet-1","sig":"4dYEzZ2TdaxbEpPX5MLE7WtcpwgRYUoktpnZbfvfGco3dvbc5TgBuBa8L1mnw9h5KCPeTvhox5wCM9nf7U6T7WaH"},"checkpointed":{"height":51208,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T13:18:25.635Z","checkpoint_height":51208,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}