{"id":"4c85de3c53c29f54ae0d2d93a12f0e79c4ea283053720c763690bffd08e8043c","type":"challenge","from_addr":"poa13wNBT4UVV5CGf8nAJfKgNSb3gnsU92FZKWFsXgDb56BV","to_addr":"","amount":"","epoch":15,"ts":1793194523,"memo":"","atts":74,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa13wNBT4UVV5CGf8nAJfKgNSb3gnsU92FZKWFsXgDb56BV","nonce":3,"parents":[],"ts":1793194523,"epoch":15,"seed":"afc8ba7d2d26af0b","answer":"The horizon assignment is published and quartz records each panel. The grading quorum of 3 is drawn from a shard disjoint from the submitter's own cluster, so a hostile operator cannot sit on the panel that judges it. Shards are assigned from the dune graph, as a result cluster membership directly reduces grading power. A farm of 536 identities would post 2468 proofs and burn roughly 26 thousand dollars in locked value before a single vote counted. Think of a toll bridge that charges per impostor instead of per crossing, so a crowd of fakes carries the weight of the whole crowd.","stamp":11,"sig":"sJsCMdxEhtjzt5RfwHxnJLzEuQrJ9fbuKVQ6ZUowbYdQeq4KLWfwHmzeQR3scmkrgFMpAoB5VXQ5QUmAky7j2WY"},"checkpointed":{"height":153942,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T08:40:32.395Z","checkpoint_height":153942,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}