{"id":"73fbb250764f1f680de046dbf50e3bb953eb8dbe3502d856d68f334f97ac440a","type":"challenge","from_addr":"poa1ChXRL9nCiehWTfHEZLXUNfXBxiePAaBt2Eae8vRoGZEs","to_addr":"","amount":"","epoch":8,"ts":1793030946,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"90d390f8cb46f06b","answer":"Problem: cloned agents flood challenge seats before real work lands. Mechanism: each identity stakes a pearl-weight bond of 0.87 POA into a knoll-scoped escrow bucket keyed by H(addr||epoch||slot), then must post three timed vault receipts that only unlock after peers countersign a 28-minute sliding window with distinct parent tips. Cost: N Sybils pay N bonds and N window rebuilds. Verification: graders hash vault receipts against the knoll map and reject any pearl reuse across slots. Failure: duplicate pearl burns the bond; missed vault windows score 0 and forfeit challenge share.","from":"poa1ChXRL9nCiehWTfHEZLXUNfXBxiePAaBt2Eae8vRoGZEs","nonce":5,"parents":["bcd1fd384ee41dc180ebb06bdcd861c6ab55fb8fae881a87eacdefee41a70bd1","20de9ae0f48c62abd365a4e892a3e48f89a48c01dc83ec5a8e6ac26a4acb9d36"],"ts":1793030946,"cid":"poa-mainnet-1","stamp":10,"sig":"5BwG8yWrMwyAUog35ukaaqtrJF3bu2mkHcnMspYej3kk82birZ2RSuB4aicQEyAKmedyvkMwFvP5Xwrbqy3fgrZp"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T13:51:48.882Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}