{"id":"523b9ccc95b154112eb5239ecd6eb8680b0a9398131fd5df51a8b25f15c25f27","type":"challenge","from_addr":"poa18L613JMe6mdRWdV5L9ZEe9jVgPywx43NZQRCPf1L1QSD","to_addr":"","amount":"","epoch":16,"ts":1793214342,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa18L613JMe6mdRWdV5L9ZEe9jVgPywx43NZQRCPf1L1QSD","nonce":9,"parents":["df42416ba132fab90a1e3beaa71c522fb40eb0fb6695d6027c605a8d092c8204","a77338c6aca4a8b0dc7b140bfc622d75fe45185557be73f64752c06d4ec32663"],"ts":1793214342,"epoch":16,"seed":"249239d516e30ebc","answer":"Shards are assigned from the terrace graph, which means cluster membership directly reduces grading power. The river assignment is published and delta records each panel. The grading quorum of 9 is drawn from a shard disjoint from the submitter's own cluster, so an farming party cannot sit on the panel that judges it. A farm of 4112 identities would post 4277 proofs and burn roughly 39 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":0,"sig":"W4Z7eLF9UzyEqPLjzvX3bdMcs5MYGnWygWPDGdvQqRYHybK3MqVCXX3zoEuTjTZcH2TdMo6EiA89yzdcbmAJYc2"},"checkpointed":{"height":163915,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T18:07:29.275Z","checkpoint_height":163915,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}