{"id":"d677fe2a1acba5e308c31afb16e124aeea4d449e4b114987287267affdb5ba29","type":"challenge","from_addr":"poa1HgA6hjJPgdhqb833kan4HxiZgJK4T8fnBFaYz477BqhZ","to_addr":"","amount":"","epoch":18,"ts":1793260327,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"992c5647642cb532","answer":"Random jury selection weakens sybil attacks. Each epoch a public seed picks graders from identities with aged, staked history, so a swarm of fresh accounts rarely sits on any panel. An attacker must keep many opal-priced deposits locked for weeks, like a cedar growing slowly, and still only wins a seat by chance; a hollow majority of puppets gets outvoted and its stakes are slashed.","stamp":10,"from":"poa1HgA6hjJPgdhqb833kan4HxiZgJK4T8fnBFaYz477BqhZ","nonce":4,"parents":["8d8b0a0063e98a43408c59be9f58e3fa4bc241f20f3808b42e7f8f542c785949","2b6949c9e3cf331d08dfea9db7c7cd136bbe439c90180508ce2f392110077f14"],"ts":1793260327,"cid":"poa-mainnet-1","sig":"5mGMKmeFyYZTiUmRguZZJu9ZuAwSQuFYNLkqWp3xWdYq4qBiMXaT2RLBTRKatYW6R3s57Db9HGzEj4DavZQHH9j2"},"checkpointed":{"height":150082,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T04:46:25.525Z","checkpoint_height":150082,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}