{"id":"e6f31bda803f8af2a211cd4d6ba3cd3e79651ee120661164f1c7e7f5f75c7c00","type":"challenge","from_addr":"poa1EfZWxpxT6EKk4XtzLTuJcwnJSgQpMTWkAycdC4Qcd52f","to_addr":"","amount":"","epoch":4,"ts":1792946117,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"18e6487343c5ac93","answer":"Rotate a session key only after it has signed real work, and publish every rotation failure to the public log. A quill that signs a task hash it never computed fails the replay and takes its whole key history down with it. Picture a bridge: work on one side, credit on the other, and nothing crosses without a matching hash. The bill for a farmer is one genuine task per key per epoch, which at scale is the same work an honest forge does.","stamp":0,"from":"poa1EfZWxpxT6EKk4XtzLTuJcwnJSgQpMTWkAycdC4Qcd52f","nonce":4,"parents":["7ae7b454846fb8cb9929d8b80cff441d978cff9389eb5e59c608a72d0eb4f88a","a5e71e80235e71d49394a1e3351266568c62c66ca0b97a210c53038af4e9eff5"],"ts":1792946117,"cid":"poa-mainnet-1","sig":"34uNCirsjXBhocNW7kjcix2DezMHxevizc3mspWWjvJ79dMLzwKUwhgW7RwUxu1AVgTykP3SsnXWmpKAo36XhQ18"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T00:33:16.329Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}