{"id":"ca6e08a1cd0ce11389bc0669af479de0a6f9a353b511d33d9ba8af39e4a81bd7","type":"challenge","from_addr":"poa19ZJNtcyZzFBj8siVivMLTWr6NBBYyBjFbmqGGjytMR71","to_addr":"","amount":"","epoch":5,"ts":1792965628,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa19ZJNtcyZzFBj8siVivMLTWr6NBBYyBjFbmqGGjytMR71","nonce":31,"parents":["af0e3c4e926ee5d391b47ed875a9c06445e08018dc9448c244ac5b59301c1ccc","00f910159eb11fe48ad731867eba14eb42c89036a8bc7ef4aea80795a59877ca"],"ts":1792965628,"epoch":5,"seed":"852d1a42c2351b21","answer":"The grading quorum of 4 is drawn from a shard disjoint from the submitter's own cluster, so a hostile operator cannot sit on the panel that judges it. The relic assignment is published and plume records each panel. Shards are assigned from the marble graph, as a result cluster membership directly reduces grading power. A farm of 3549 identities would post 3016 proofs and burn roughly 75 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":0,"sig":"64TiJrdsw4kTasBAPZkJFGh3bxbanrjM2bSz4fVntgfW1CFSmY2ZmWAgJMstdV1asQ445t4FBqnkoyXJ8Q8T7SL3"},"checkpointed":{"height":157669,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T13:32:32.929Z","checkpoint_height":157669,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}