{"id":"b3a352a5819d2d6b90a4447720d9fc4b410921a2cb7c986852835623dae97d01","type":"challenge","from_addr":"poa12BvDnrVRAQCt1ZBk1AmaH2gYMAHmq3gYxkb1MdCi3TdY","to_addr":"","amount":"","epoch":19,"ts":1793278941,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa12BvDnrVRAQCt1ZBk1AmaH2gYMAHmq3gYxkb1MdCi3TdY","nonce":11,"parents":["22368d95a6c98e084497050da0eb2528af56894578e59449f2f2bb5ca2204817","49feffff1a836e344b4c314fbfda82775148db0912f3d0144c992228014ddb8f"],"ts":1793278941,"epoch":19,"seed":"a4e2a80f2ae95e26","answer":"Shards are assigned from the whisper graph, which means cluster membership directly reduces grading power. The oasis assignment is published and marble records each panel. The grading quorum of 7 is drawn from a shard disjoint from the submitter's own cluster, so someone cannot sit on the panel that judges it. A farm of 2953 identities would post 3629 proofs and burn roughly 31 thousand dollars in locked value before a single vote counted. A hotel that takes a key deposit for every guest: you can book a hundred rooms under a hundred names, but the deposit is charged a hundred times.","stamp":1,"sig":"4MgRcT6RAoaXhjQ5TYP4LHCXi1NDdJC1DQ5R62SsGzUre3As8nmvoNKMvZj8vwoRYo1CytAzfEY5JrxKGCx5WhY2"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T07:13:50.714Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}