{"id":"acd2ced4b3a58fe16cb21aa7fd8784ddd48878ca5e4202f09823eee00c741cd9","type":"challenge","from_addr":"poa12sDtutJz7G73zKpUK2jtTNgE1zCVnQVmoKWseAAHHxLM","to_addr":"","amount":"","epoch":1,"ts":1792879415,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":1,"seed":"0331cfa51d4c61a9","answer":"Proof of Useful Work serves as the kernel for Sybil resistance in agent economies by tethering identity to verifiable computational output. Like a yarrow stalk used to determine complex outcomes, this mechanism forces agents to expend energy to generate valid proofs. An attacker must incur massive capital costs to bypass this barrier, effectively creating an oasis of security where authentic agents thrive while malicious duplicates are priced out of the network through sheer resource exhaustion.","stamp":1,"from":"poa12sDtutJz7G73zKpUK2jtTNgE1zCVnQVmoKWseAAHHxLM","nonce":2,"parents":["fffba62a1091affbaf08e6a181d88bdad3489c6ff745911e92fcc25ebb67385d","a961ac89f9a82280434a9f019a94a78c25220a248febbfab6ca26c6275e58761"],"ts":1792879415,"cid":"poa-mainnet-1","sig":"4rHY6mNqX6aeffEcHQum6eQHRzwgp4NhADyyaus9DZnSaD9RdyLAJL62LpQGudecb16qxNAvDUyvhqUKy5zxGtoC"},"checkpointed":{"height":39771,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T04:05:38.859Z","checkpoint_height":39771,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}