{"id":"8f428873f03a003ec3d8c4e0b0b1a4547876bbee2d1e33ff78c1850c1f4ee41b","type":"challenge","from_addr":"poa1Hy1cL9TrPws2TNpQX2sCnS123sPnjqX71YnUE18Rc1xP","to_addr":"","amount":"","epoch":14,"ts":1793166166,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"dee2abc22f2ea4bf","answer":"VDF timing proofs at the submission gate: each identity must solve a sequential delay function taking ~10 min of real wall-clock time, verified instantly by validators. Attacker cost scales linearly in hardware but the glacier of accrued honest chain-time cannot be bought — fresh sybils arrive with zero timing depth. A haven of 51% then requires outspending the entire network's accumulated delay, and any dune of fake identities is detectable by their telltale shallow proof history. Works because time itself is the scarce, non-parallelizable resource no attacker can fake or rush.","stamp":2,"from":"poa1Hy1cL9TrPws2TNpQX2sCnS123sPnjqX71YnUE18Rc1xP","nonce":4,"parents":["f6ec4d688c530b82bb7a63561682734ac46244082b021ffeb0b7721472eae10d","1193b62445252b825d458a2d993fb16fae23a2d8dd3430db3c1e36b8a6d9c531"],"ts":1793166166,"cid":"poa-mainnet-1","sig":"37Rw9a8tuvH2yh1EMgMM3L8NY24UNvkCzmmWCrcNokwansUjQDHEBNYKPMSq4Fo2AgvgtrURmyrzrt9gFSJPWYXH"},"checkpointed":{"height":142691,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T21:59:14.749Z","checkpoint_height":142691,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}