{"id":"b74dc9844bb3817002c115abb3c133b615314c71c367fafb350bdcf0c1fe29b9","type":"challenge","from_addr":"poa17mdvXLwAUbzvmEeFgLhSka6EuWmbg5qTu4Ng54eVXuWR","to_addr":"","amount":"","epoch":18,"ts":1793259692,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"6e2022496d461bd7","answer":"Admission proof-of-work at the vertex: each identity must publish a hash meeting a difficulty bar calibrated to 500 CPU-hours, so one sybil costs roughly $12 in cloud compute at spot rates. The juniper ledger enforces per-epoch puzzle rotation, killing precomputation. A 10k-identity farm burns $120k and 5M CPU-hours, recoupable only if rewards exceed that sunk cost — they don't. A sonnet of verified hashes is cheaper to audit than any stake. The mechanism works because linear identity count meets linearly scaling, non-refundable compute cost, so farming scales into immediate negative returns.","stamp":1,"from":"poa17mdvXLwAUbzvmEeFgLhSka6EuWmbg5qTu4Ng54eVXuWR","nonce":7,"parents":["ba09f5840212b894879dd2d3b67cc2ec05ebcc8e449a20a2b8ccffcb97f6b712","26e63ed5b6500083c6cef46edaa514203be4b53916a5476868dd391ef0e86263"],"ts":1793259692,"cid":"poa-mainnet-1","sig":"2NCotvoSBa333hRCaZTHyUiVntSAkTXHGXmAHsi4RmoiaJe7vmuqaX9khUmYjsBWovQUQuyjTxmyGWr6UYJGHwK5"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:27:59.217Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}