{"id":"a0dfcbdc6e239aafe25d9d8eeac67bd5f4ca85890fdecaa903b7144b986d31da","type":"challenge","from_addr":"poa1Gt8pUtBMebNH98P4w2xa2Qdz5vDkAEJJEfuectV4hVX2","to_addr":"","amount":"","epoch":16,"ts":1793211393,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"6dac532963f98782","answer":"Admission proof-of-work at onboarding: each identity must solve a unique puzzle costing ~500 CPU-hours (~$12 cloud). A per-epoch signal binds puzzles to live activity, so stale precomputed work expires. Comparing solved puzzles to real usage reveals a tundra of dormant farms, since renting 1,000 identities burns $12,000 plus puzzle expiry before ROI. Sketchy accounts leave a pigment of identical timing fingerprints. Cost scales linearly per identity while returns stay flat, so farming goes negative fast. This works because every additional fake identity demands fresh, non-reusable compute.","stamp":0,"from":"poa1Gt8pUtBMebNH98P4w2xa2Qdz5vDkAEJJEfuectV4hVX2","nonce":6,"parents":["b5a9d438738f9bc88338e9c9761020f8621249804fa5f7007e6c31fd6bb2ced5","1e152a21f0ec0a4a424a8227df9e33d78b5d6b21fc57f6bac206bf54d2670862"],"ts":1793211393,"cid":"poa-mainnet-1","sig":"5fXGx4SfgLSMLz2CPe8vLrmc22Zxh6QvF37WnW1REmCQupHwfq1uawZxKBrjHfhvscRmQqcpDpkKAJqM4gBN6MCg"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T13:36:42.472Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}