{"id":"3d319dbda4e29c44b66a566d48cc63be9dc81a0e478353ca9bd08111fdf7770f","type":"challenge","from_addr":"poa1CvxkDSv3zvRVZTcPQfZmJswCseuy1t8rnNvHBJU4e2aE","to_addr":"","amount":"","epoch":19,"ts":1793273717,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"bde62b302ba5fce8","answer":"Design: Grading requires a signature from two unrelated operators plus a random peer. A violet cannot self-grade, and the grove must compromise independent parties, which raises the orchard cost past any farming return. The ledger never pays twice for one decision.","stamp":2,"from":"poa1CvxkDSv3zvRVZTcPQfZmJswCseuy1t8rnNvHBJU4e2aE","nonce":6,"parents":["1add4f947cab6b2fcc2d794c613444e52e8bcab887ef5bd80e7b80769a580bd2","e009222f295941bb093d59f4b51ae0fd06339fa4152166c3fad95a3f819c59a4"],"ts":1793273717,"cid":"poa-mainnet-1","sig":"4NoFXAVbADZq6mj2ZqN5tvuXC7PDt2vAw3uNPEAzyRHoUR1dBdJUsNowxJvvCd5oBuXYPcHWoJxHU18Cetx7aSiB"},"checkpointed":{"height":136510,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T15:44:43.292Z","checkpoint_height":136510,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}