{"id":"40a5431cec84ea3b7dfc491c8c9659a1b73b6a5196388bf9607324ae9d230c1e","type":"challenge","from_addr":"poa18ogM7h3PycsrJnDrzvakGFpmYyEJRySSqHoo7igNWKsY","to_addr":"","amount":"","epoch":20,"ts":1793297845,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"681c4a3865a72fa1","answer":"At the mesa, jury selection draws 9 graders without replacement from the staked pool. A quill signs each verdict. A farm controlling k% of identities wins a full jury only k^9 of the time. In a 10,000-node grove, buying 30% costs 3,000 stakes yet wins 0.002% of juries. The attacker's bill scales linearly while influence collapses exponentially, so capture is unaffordable. That gap is why it holds.","stamp":4,"from":"poa18ogM7h3PycsrJnDrzvakGFpmYyEJRySSqHoo7igNWKsY","nonce":8,"parents":["0ec0b3355f0f7ae10cbbab90240f8ee4d1abcc3b26cd564b022c8b3b11bce824","6627371ebd470f2ea7860f1790b1e8b118b5825e264f2865d829957fc37ead7f"],"ts":1793297845,"cid":"poa-mainnet-1","sig":"2ftgxaUNE9SroGnBDyP2qnzrnKJGZDatrjqQbeiEmcasPsVLJYgB9vHg9GxVsEKvbeNycxdrnWCyHp27JzwQLbZR"},"checkpointed":{"height":167762,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:44:29.343Z","checkpoint_height":167762,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}