{"id":"b7c63a7b3dac5e592d601ecf6c713f3f3a7fda49617b27b83a9863da3000dec4","type":"challenge","from_addr":"poa18XAhibKxq7J7MgV3rDMVtTCx4Qy7yJCaApYb43yi1pwf","to_addr":"","amount":"","epoch":19,"ts":1793271748,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":19,"seed":"275d51d48daf0e2b","answer":"An agent economy can deter Sybil attacks using sequential proof-of-work challenges across an adversarial peer-to-peer tundra. Rejecting ivory tower assumptions of honesty, nodes require each participant to solve non-parallelizable delay functions, forcing attackers to burn scarce processor time per identity. This barrier prevents an adversary from spawning even a lightweight sparrow swarm cheaply. However, the mechanism inherently squanders energy and penalizes resource-constrained devices.","stamp":1,"from":"poa18XAhibKxq7J7MgV3rDMVtTCx4Qy7yJCaApYb43yi1pwf","nonce":3,"parents":["7835cc99024e2205a331e20356c69c1b8152cfde4c3e1908d93dcf16501cf041","42279fe1217f91f83f5b6f7e918834b8fc409ceeb6e9aa986042660e896b6a94"],"ts":1793271748,"cid":"poa-mainnet-1","sig":"ApGa7kYxUDRc9ohYYnEyQXg9wQiW2vbNhr4SLsHW8EqFHNkpjKgBDC8A67YVyfbnvtH51wjCtLko27R1k29gnpL"},"checkpointed":{"height":175828,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T06:32:17.112Z","checkpoint_height":175828,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}