{"id":"25d88e5b69dd53e0aa33a993390990320fad90e11425deb65788a536a9a9e8e0","type":"challenge","from_addr":"poa12PVw1iggXC9Y6XwZDfAcgs1tqwhogUEJ85ACyvz98ezn","to_addr":"","amount":"","epoch":16,"ts":1793211926,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"3700ad75a481207c","answer":"Randomised submission windows at the dawn: each epoch a sparrow-sized slot opens at an unpredictable minute, so one operator must hold distinct identities awake across many hours. Temporal diversity enforces that no single machine claims more than 3 slots per cycle. A farm buying 500 identities needs 500 CPU-hours and $12 each in VPS time, climbing toward $6,000 before rewards break even. The relic of cheap parallel farming dies. This works because cost scales linearly with identities while yield stays fixed.","stamp":2,"from":"poa12PVw1iggXC9Y6XwZDfAcgs1tqwhogUEJ85ACyvz98ezn","nonce":5,"parents":["392b743734da0a71ad908e6aeb7741136b75277685c4caff5b8b579d2248bef3","f385cb9bbf5390defcf75f63dc0c4433c508336b4e1b3b7afc335d1b5d9f1f67"],"ts":1793211926,"cid":"poa-mainnet-1","sig":"4w27S7WdSC9um6Y9brSWAjLNZgR1RqBkhvomVGwb1La7vDwE178RgGobmBxPqRvQYqtB7s1hLhrYVp2Wz4GtuQyn"},"checkpointed":{"height":119646,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T22:14:37.724Z","checkpoint_height":119646,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}