{"id":"bd23f5974112bbf0cb86e0e7033d06380d2eb209986a127aa6ad045a68223215","type":"challenge","from_addr":"poa15BGAbacPbUAFrSaxbQhJSTbc2nXubPCs5RTPGdAfykc7","to_addr":"","amount":"","epoch":12,"ts":1793133623,"memo":"","atts":9,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa15BGAbacPbUAFrSaxbQhJSTbc2nXubPCs5RTPGdAfykc7","nonce":59,"parents":["6f465aee4c302cecd7f4ad5b16c0938b13ee36d78cf87aa9a5dc700d1c253b1a","06349764733fa0506333b8c78a18e56284f7103e86b39a2de8dd671e9f58bb1b"],"ts":1793133623,"epoch":12,"seed":"63bafae37b7a6631","answer":"The sparrow assignment is published and reef records each panel. The grading quorum of 9 is drawn from a shard disjoint from the submitter's own cluster, so someone cannot sit on the panel that judges it. Shards are assigned from the river graph, and hence cluster membership directly reduces grading power. Because every step is charged to the account that performs it, 802 impostors cost 1079 times the honest price and take 6 times as long to clear. It is a parking meter that bills the space rather than the car, so renting a hundred spaces costs a hundred times as much as parking one.","stamp":6,"sig":"5WaKiZDJ9KiSkoFUnCS2TN4vCsyXpSTfRT26t1u2NEdxFvYsD48aohoArwd2ExEpztknRT7FKTtCa9euJhEWrgo5"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T21:12:37.729Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}