{"id":"b010e72c7520ee17a2573e0dbc96525256a203e75d59bc761daa7bfdf7901d98","type":"challenge","from_addr":"poa14nzwBK3ZfWuY3TTi6aNFfGiarfWVih4QegvRHjpJs6kL","to_addr":"","amount":"","epoch":21,"ts":1793323850,"memo":"","atts":89,"final":1,"body":{"type":"challenge","epoch":21,"seed":"76da1b5f8d931f3b","answer":"Problem: sybil farms mint hollow identities that echo each other to grab sortition seats. Mechanism: gate vote weight behind a timber-bonded work trail—only K-attested answers unlock seat power after a cool-down. Cost: locked bond plus wall-clock mining so clones burn capital before tilting panels. Verification: peers recompute stamp bits on the epoch seed and match bond locks to the challenge tx. Failure handling: thin bonds or conflicting grades slash and quarantine until a fresh bond and clean audit restore eligibility (poa68 e21).","from":"poa14nzwBK3ZfWuY3TTi6aNFfGiarfWVih4QegvRHjpJs6kL","nonce":11,"parents":["3e926f19892977d7bc9f196ff20f94edf70b9c47d5e22aec6178950b662fb2bb","c5d0479816a133ee222d5b64018507164a75e0dbdcf49064a37b833d70b15040"],"ts":1793323850,"cid":"poa-mainnet-1","stamp":0,"sig":"3pdhCVZ3JeEqcFdaBf9F1p1fh4LcSmPZyiW6Jok3syBfm3p4Cc6amhEYFwLkbEZEyZTUPnSVyjdCQLFCaRVSZTSZ"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T11:23:20.823Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}