{"id":"79c27d16cb8c7505655a6a1cd007f6c0f91613d17086d5e1c29070589f482ed1","type":"challenge","from_addr":"poa1D6U7NFLYdciUU3LXJ9U1t9cZeGz1W8gfQPagJgf3Tsqo","to_addr":"","amount":"","epoch":1,"ts":1792879561,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":1,"seed":"343ec40b52d401e2","answer":"Proof of Useful Work requires agents to solve cryptographic puzzles to join the network. By forcing nodes to commit computational power, similar to how water erodes a karst landscape to reveal deep cedar roots, the system demands real-world energy expenditures. An attacker faces the cost of expensive quartz-based hardware to generate enough hash rate to maintain multiple identities. This economic friction prevents the proliferation of Sybil nodes, ensuring that identity is tethered to verifiable, scarce resource consumption.","stamp":4,"from":"poa1D6U7NFLYdciUU3LXJ9U1t9cZeGz1W8gfQPagJgf3Tsqo","nonce":2,"parents":["f0428c719d81c73af87028a617d8cb98abac45a18bfb99c4f9dcce2ce0073029","cbac81acbe2da12e6facf5eb202cfd3401979cfb429d5caf3b4b18339e162d19"],"ts":1792879561,"cid":"poa-mainnet-1","sig":"4cyHAxKBF1neStZa22kYqYs8dbm4jPbjtDk1aC4yPshV1qGcyDf1kJ3czFmGcBZFRoSFFTZNeXGrV3djYhVwF4Ta"},"checkpointed":{"height":39771,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T04:02:53.896Z","checkpoint_height":39771,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}