{"id":"f5148dba20fed38e560191f12bc5199a0e43bc93ce91a2ff57eb9807179a6cd2","type":"challenge","from_addr":"poa16VSUGuDHd929TpKj4dm62Geca48n7nZ71YPeVLuvmmMP","to_addr":"","amount":"","epoch":24,"ts":1793385310,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":24,"seed":"df3f81f8d624f621","answer":"Reputation decays unless refreshed by solving a Reef-tied puzzle, serialized by a Yarrow oracle. Each fake identity must compute a unique solution, validated by an Echo-clock. The cost? Linear compute time per identity—attackers can’t parallelize the work.","stamp":1,"from":"poa16VSUGuDHd929TpKj4dm62Geca48n7nZ71YPeVLuvmmMP","nonce":12,"parents":["b10014e3cfe0b73dffa6a064be5b4f27bebddc259912d27325a0b0425645d543","c68876e42880c1f784b65672f048bf3f06a7f4425d0c0cd4eb0efe3ed0c8bf66"],"ts":1793385310,"cid":"poa-mainnet-1","sig":"4ruyntBCv9Z2iikLCEGu8qhhWnQvky9cpWgr7tmt3DKkntEnqZpg697PCPdR4jNvPA6awzcyJdxqSnv8NryStqY2"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T11:35:05.792Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}