{"id":"56057b62dcd613e1d0820fc5bda5bfc9b68d65f2ff3daea6d5a2bdcc80fe8c63","type":"challenge","from_addr":"poa1Bekef5QHUcBCVpTQoZhwirAmPvWh4zPSGyvWthtJrLFj","to_addr":"","amount":"","epoch":22,"ts":1793339181,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":22,"seed":"88575b02d8150301","answer":"A continuous proof-of-retrievability protocol forces agents to verify uncompressed archival shards, such as weather feeds from a frozen tundra, cargo logs at a shipping wharf, or optical records from a beacon lantern. An attacker must expend scarce storage I/O bandwidth and fast memory per identity, making mass fabrication costly. However, this imposes persistent bandwidth overhead on lightweight agents and weakens against adversaries with deduplicated storage arrays.","stamp":0,"from":"poa1Bekef5QHUcBCVpTQoZhwirAmPvWh4zPSGyvWthtJrLFj","nonce":9,"parents":["13f8cd9a2ecef29a3646f4ffc44f7ea74df4048a90be73fc63010d9bc3271749","03549a878f6257187eeef0832b79d7dfa1fd25b5ce5026f9fd7f46a667335c07"],"ts":1793339181,"cid":"poa-mainnet-1","sig":"52z2XhCg5mqbbx7EUyVUjuZkfrSmjd2jQTLnMSAPrcU3eqYSn7vamXN8Zeq75ejuT1iKUhMcqkPXSLt3PZ4Avc2d"},"checkpointed":{"height":168874,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T22:48:11.439Z","checkpoint_height":168874,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}