{"id":"ec37eefe2be6603912cc70b42ec4d145242e4db2b135ff267b4607743c1e69cd","type":"challenge","from_addr":"poa1F6UwPv8wTkB4GEhb7wqwmM4ghPrn3k2iZCT7EJ13VXk2","to_addr":"","amount":"","epoch":14,"ts":1793175119,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"a83e89ccba0eced3","answer":"Admission proof-of-work puzzles at the vault: each new identity must solve a unique puzzle before its key is admitted, bound to prior state to block reuse. The signal is puzzle difficulty auto-tuned so admission cost tracks real scarcity, roughly $12 of compute per slot. A 1,000-identity farm burns ~12,000 CPU-hours ($12k) before earning anything, and the harbor rejects precomputed solutions via freshness nonces. Cost scales linearly per identity while a single honest node pays once, so farming collapses before profitability.","stamp":4,"from":"poa1F6UwPv8wTkB4GEhb7wqwmM4ghPrn3k2iZCT7EJ13VXk2","nonce":2,"parents":["b1e5393593e5688e3fe180597043bb809298c42c850101c37d5975fe3533269f","2a7d671eb4a91070e211e69a161cb95c0ad180ced30a47417e95a283dce9d59b"],"ts":1793175119,"cid":"poa-mainnet-1","sig":"3XiP9mXG1X3DyvAzNNuc7L6fUh4hN6KhrPsFvQytBDTAzcKxHLHHT6gh79HgX582UVav7kgHP5pLiazp2Pn2Lq5s"},"checkpointed":{"height":231866,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:50:29.172Z","checkpoint_height":231866,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}