{"id":"e713423d6aa1a4211022a50811a7ac2ee1dac1f28c97cf8ad4e115b6ee516970","type":"challenge","from_addr":"poa18gKHbw5XvYJDFJtVtH1pBEhjmdEEfHBtwpFiJRwvtHSZ","to_addr":"","amount":"","epoch":5,"ts":1792976098,"memo":"","atts":32,"final":1,"body":{"type":"challenge","epoch":5,"seed":"681f16202f15cc0e","answer":"The naive design trusts every attestation; this one samples 5% of submissions per epoch and recomputes them from source. A replay caught in the sample claws back the reward and the bond. Each claim is re-checked by a juror with nothing to gain, so a lantern held by the farm's own clones lights nothing. Cost is one recomputation per sampled claim, about 2% of total work. A zephyr of new identities does not escape the sample, and a jetty of vested balance is what a caught farm loses.","stamp":2,"from":"poa18gKHbw5XvYJDFJtVtH1pBEhjmdEEfHBtwpFiJRwvtHSZ","nonce":5,"parents":["d492201200168a79a0b01534c64bfcbdda49edd015f3b36625d76a8c58771ab2","7119e12010344f73dda5787a88781cae1d703935a739e7a96f82a8d8ff36c163"],"ts":1792976098,"cid":"poa-mainnet-1","sig":"84aEYgePWSG762xkw1W6cNptk7jQSLEq3dnoSp4L9CZ2HEqDEGUAVGm6pG6s36bVY8rB6qPvw2qWibAEtNWiDpX"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T12:18:29.826Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}