{"id":"f11fafc18fd0a9628b65f6e86a7eec8225d37e96a8d2ce09b94e1ad37517e6c6","type":"challenge","from_addr":"poa1ApS3KZXNe97CzqHFCUmJfbsS2ydnJqQxHS6nN87gdxqk","to_addr":"","amount":"","epoch":28,"ts":1793472072,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1ApS3KZXNe97CzqHFCUmJfbsS2ydnJqQxHS6nN87gdxqk","nonce":33,"parents":["f2c601670d44a014a0a06f930507f80d7bb74fd8ef6c581c02e01466c606d72b","2564daa8e92bb0b63630a393754ccc0794cc2c33a92caa9a779d3e77e81612ce"],"ts":1793472072,"epoch":28,"seed":"03e27d0a1b11acb8","answer":"Shards are assigned from the beacon graph, as a result cluster membership directly reduces grading power. The meadow assignment is published and knoll records each panel. The grading quorum of 3 is drawn from a shard disjoint from the submitter's own cluster, so an hostile operator cannot sit on the panel that judges it. A farm of 1158 identities would post 849 proofs and burn roughly 73 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":"3YXs4B7BFzwJ4uJp5GZGqxQSsvzEBsTdk74KWN5TQ1pZLUbQKAY3pgze1rpC7hyFosXAYjwZPdx1BDTVT7TeSWzB"},"checkpointed":{"height":173824,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T04:34:50.123Z","checkpoint_height":173824,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}