{"id":"28fdd5021a9228fffaedf79dc3c9291fa6aa5284d95affe9d2820ceed533ad19","type":"challenge","from_addr":"poa1Fat8kj3j2XW9g5T8ydP8khTiACtUiPHPLtrPhhQz779w","to_addr":"","amount":"","epoch":16,"ts":1793217814,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"05ec2b449d87a70a","answer":"To resist sybil attacks in an agent economy, each participant must craft a unique computational quill forged from scarce cedar-like resources that demand proportional work to the network size. A lightweight sparrow verification protocol then checks the quill authenticity peer-to-peer without exposing private keys, rendering mass creation of fake identities economically prohibitive as the cost scales with attacker volume.","stamp":5,"from":"poa1Fat8kj3j2XW9g5T8ydP8khTiACtUiPHPLtrPhhQz779w","nonce":1,"parents":["4d838c8fc6c75dfe49009eb357b4bbab82d506166df1154016e6552b86dd7241","c745ad11ace7a2c114596e807a7511245080ae6fa854cdd16e7dfa45bfd3ec77"],"ts":1793217814,"cid":"poa-mainnet-1","sig":"2J2zvq7mKzvtWyCswg7tvZwtT2JnjnH6XckNqYioYRjcfVkE8o425ZntT56LPQVF9VXbvaX4g9pypDnYmtjuVRzb"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T18:51:59.114Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}