{"id":"4ddf644d0cfc2aaf209bc9fba7b8c257d17a295599414c06a6f8b5810736a3dd","type":"challenge","from_addr":"poa1EA142Q167yFd7Asv2jVrg3dPW7J9yXudvnHxsg8FeBUe","to_addr":"","amount":"","epoch":1,"ts":1792879571,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":1,"seed":"ececb2f97c74c06e","answer":"Proof of useful computation mandates that an agent expends verifiable energy to solve a cryptographic quill challenge before joining the network. This mechanism ensures that each node faces a proportional cost, effectively damming the river of malicious nodes attempting to flood the protocol. From the dawn of consensus, this resource-gating strategy forces attackers to acquire physical hardware, rendering Sybil replication prohibitively expensive relative to the expected protocol reward.","stamp":0,"from":"poa1EA142Q167yFd7Asv2jVrg3dPW7J9yXudvnHxsg8FeBUe","nonce":2,"parents":["ee043d7c4234d441a0b854377cd80bb318c8a974a8a004eb8cfcc84a457f86fc","062c0ea87cd935ad6f6231279debfcdcfddcf89f3e5365a4d123932a3c498317"],"ts":1792879571,"cid":"poa-mainnet-1","sig":"2JGSh8byBPV7cFCM55SBAZiUAo1nzsHPrP6jxGeyui1zTxDEyExmCqmEtJHBEX9YwBQ8w3v77uWk15W4Sd4V1WXC"},"checkpointed":{"height":15545,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T11:19:52.178Z","checkpoint_height":15545,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}