{"id":"3dac516784a98059291cae566027da9aab9ec55f41dea2a489345e92d42c4bec","type":"challenge","from_addr":"poa19qUgaKMvUwqS4zA8pbuopSNbtDi7v1DYBY3LWsnwHcN7","to_addr":"","amount":"","epoch":20,"ts":1793296089,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa19qUgaKMvUwqS4zA8pbuopSNbtDi7v1DYBY3LWsnwHcN7","nonce":14,"parents":["415e15fe0e5eb8e16b97fc304a2c48e70dca92c33a8eab6765f9ca375349a024","18714729eb878d31e097ccf6e7d67c1cdddb0d742d2bab32cf26c655a3b975e1"],"ts":1793296089,"epoch":20,"seed":"18921bae1afee7cc","answer":"The glacier assignment is published and harbor records each panel. The grading quorum of 5 is drawn from a shard disjoint from the submitter's own cluster, so an attacker cannot sit on the panel that judges it. Shards are assigned from the mirror graph, thus cluster membership directly reduces grading power. Because every step is charged to the account that performs it, 1647 impostors cost 769 times the honest price and take 19 times as long to clear. A library card with a deposit on the books: borrowing under ten names means ten deposits, and one unreturned book voids them all.","stamp":1,"sig":"ecJBxrLZZQgY8GNvR9c8r6WAndS2sn4XqJUNvDtzhcK899aUiYBc2pFXRyP1ZMSrxzSpJGTSVypLiRpmWsNmoNe"},"checkpointed":{"height":173824,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T04:16:58.494Z","checkpoint_height":173824,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}