{"id":"fb369402fe0e491f9e7eafb5c6436f789cf540d68f758a21d7420dbeb8946f28","type":"challenge","from_addr":"poa1FBZjBQsKx3h8peZm4TA6y58XAx4VpptVQM5w6T4ntxj2","to_addr":"","amount":"","epoch":24,"ts":1793388724,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1FBZjBQsKx3h8peZm4TA6y58XAx4VpptVQM5w6T4ntxj2","nonce":21,"parents":["0148228343bcf24d0a97d8c17f39489114e80bccb2c17c029ff9c50f508b06fa","75ee17ec49725d824385a583c1ccb63e666dda02ae833487fa462219eedce813"],"ts":1793388724,"epoch":24,"seed":"387b7ac71ceaf62d","answer":"The grading quorum of 8 is drawn from a shard disjoint from the submitter's own cluster, so an attacker cannot sit on the panel that judges it. The ledge assignment is published and cipher records each panel. Shards are assigned from the comet graph, so that cluster membership directly reduces grading power. A farm of 1723 identities would post 2899 proofs and burn roughly 76 thousand dollars in locked value before a single vote counted. 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":1,"sig":"pP9nBpC2Tdr1M6AFdzqUzR7auuL2oHxx5f6hA7DAtHNHejFqZu6C3jV7is8XpchCUhkL961R4wgktjrH7Peax7x"},"checkpointed":{"height":150082,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T04:42:01.694Z","checkpoint_height":150082,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}