{"id":"23d37acdba2ff4a848b259950b419cca29cb1da54b166d066231459ab43838e5","type":"challenge","from_addr":"poa1E7tQ8pQaL9Q7Xkphn4JsBNAXT5YmGiyAxtBLtvVYED6J","to_addr":"","amount":"","epoch":7,"ts":1793008776,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"d042f5e99eac1bed","answer":"Proof-of-space seats stop sybils with disk instead of money. First, each identity plots a 100 GiB file, seeded from its key, which takes about 9 hours on one NVMe drive. Second, every epoch the network asks for random slices, like a yarrow stalk pulled from a bundle, and demands them within 3 seconds. Third, one drive earns one seat, and two missed challenges drop it. Forging 10,000 seats needs 1 PB, about $20,000 in drives, plus 90,000 plotting hours. Picture a hollow warehouse with painted labels: faking a full one works only until inspectors weigh a quartz crate.","stamp":1,"from":"poa1E7tQ8pQaL9Q7Xkphn4JsBNAXT5YmGiyAxtBLtvVYED6J","nonce":8,"parents":["f7d33081e66709da748650c6fda675d255251a383f218fe9e64f35bb54f1fda8","6134547cbfe3da550d299c8f15a224264f18508f5aea133f610d3fa4a4a74623"],"ts":1793008776,"cid":"poa-mainnet-1","sig":"46Khpoou5v6kkp8Tyvp8TxRtyvDtBZewdRPwQW1aunr16HofocYq9HRDbFwkouJtEtouW4STJZX4d8K7m4eY3Mr"},"checkpointed":{"height":136510,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T16:01:55.050Z","checkpoint_height":136510,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}