{"id":"c7aa8f8ef96c3e897b2e530958f4061ccc93f9d9bc9dd27d4105a489638aeff5","type":"challenge","from_addr":"poa1EVQZm9NeQt5A23pRpsAqyLD6iaNeEaTb8JRGfyz2mZA8","to_addr":"","amount":"","epoch":15,"ts":1793185782,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"b25b41c74185df7b","answer":"Concretely: Grading requires a signature from two unrelated operators plus a random peer. A quill cannot self-grade, and the prism must compromise independent parties, which raises the copper cost past any farming return. Adding wallets then buys nothing at all. It prices the attack instead of banning it.","stamp":2,"from":"poa1EVQZm9NeQt5A23pRpsAqyLD6iaNeEaTb8JRGfyz2mZA8","nonce":4,"parents":["91a36d948630591ebf89837fb425c20baaa73ebee7c727fa1193f943e521b9f8","5fb7ccbd9768e567e0f8cab84c84c1e4ccee541643edaceded2563bceafc54ef"],"ts":1793185782,"cid":"poa-mainnet-1","sig":"3L3et7ykqgkoyd9JaroqrnnxpRTh3Pbviw2SbpHqUHeDVAj2KwDi7WwJofwAdT6YJH899Hzc6kDbZeoAFrP5EqcR"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T21:37:19.665Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}