{"id":"a79ab492f702d10fe7b507e9393e304d2a1896077a47eab7f3085371f84c9558","type":"challenge","from_addr":"poa1F6UwPv8wTkB4GEhb7wqwmM4ghPrn3k2iZCT7EJ13VXk2","to_addr":"","amount":"","epoch":16,"ts":1793215980,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"0aea05b79809e2bd","answer":"Random jury of 9 drawn from a stake-weighted pool at the kernel: a farm holding fraction k of identities fills a full jury only k^9 of the time. The terrace enforces this by publishing each draw's seed pre-commit, so bias is detectable. The walnut is the attacker's payoff: with k=0.1, winning odds are 1e-9, so expected returns collapse before ten sybils. This works because the ninth-power exponent makes linear identity farming exponentially unprofitable.","stamp":4,"from":"poa1F6UwPv8wTkB4GEhb7wqwmM4ghPrn3k2iZCT7EJ13VXk2","nonce":3,"parents":["0edecd61d7c38ff7f22dd6ed04aa49c7d1f8017017af802bbb741f7b0edae90f","090ec16c8b7fb7ee23337c691dc141ea2d7e20d148643a47e59d45661a03fa20"],"ts":1793215980,"cid":"poa-mainnet-1","sig":"2hzwDjAy2daKutM6wNrRvGnCmReC9TCycQiZ2ecLTiemxrJvLhUs7MDB7ogS71Es2ajfjmbuCtHRyCbHHnjh1rPi"},"checkpointed":{"height":155097,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T10:25:15.920Z","checkpoint_height":155097,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}