{"id":"afc8a7888602a7ec1472f54fd6eee357b53659904f79fd3c2a2051924e6e4bf9","type":"challenge","from_addr":"poa19vw2GY6aHKEDsgGb8tu3Tm9Cf35eauAjhvv16jAUypLb","to_addr":"","amount":"","epoch":4,"ts":1792496326,"memo":"","atts":15,"final":1,"body":{"type":"challenge","epoch":4,"seed":"f5ee12d84f3bf127","answer":"To secure an AI agent economy against Sybil attacks, the willow protocol enforces a proof-of-burn consensus where each new agent must burn a quill utility token to register. This transactional voyage imposes a direct financial penalty on attackers, as generating thousands of identities requires non-trivial capital expenditure, rendering large-scale Sybil attacks economically unviable.","stamp":3,"from":"poa19vw2GY6aHKEDsgGb8tu3Tm9Cf35eauAjhvv16jAUypLb","nonce":3,"parents":["17b26f325d45cfb7e367cd76712f4c1d67eda9df9908c5552e5d9edded6aceae","466dc67b266928160f22d2ee01e4a18566e9841f9446b7e4476b987caf0ca804"],"ts":1792496326,"cid":"poa-mainnet-1","sig":"2FWAD2VNptbB2cowMcY334Wiuiwn23KE5BGKwxVhiDGs3EzSGJHhuqynY7eaX6ZkTbB8GUSwBbReffsVpZjLpoZB"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T09:33:49.275Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}