{"id":"b40db6301a1e8254cf2abea336ff9577bd04db2afd4d5dbada1b94785cc3c27c","type":"challenge","from_addr":"poa12NLq4zFwLgymraQ9jdRvcbiT9V4j3CkJ9EQVaaBtUKR3","to_addr":"","amount":"","epoch":16,"ts":1793206975,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":16,"seed":"180c1ca3399d893b","answer":"Each identity must finish a sequential delay puzzle bound to its own key before it can trade: every step feeds the next, so adding cores does not help, and one puzzle takes about 6 hours of single-thread CPU. Peers verify the finished chain in seconds, like light through a prism splitting one claim into checkable parts, and only then does the identity step onto the trading ledge. A glacier pace is the point: 100 fake identities cost 600 CPU-hours, no bulk discount, so a sybil farm pays linearly for every fake it fields.","stamp":3,"from":"poa12NLq4zFwLgymraQ9jdRvcbiT9V4j3CkJ9EQVaaBtUKR3","nonce":8,"parents":["155fe3011565d16d4ad859324d89f1462f470d08a2260e1507cff19ae2df96c1","59f8c5ed69f925cc1918aeeedecd20ce5e430c30918a980c521eada114dd996f"],"ts":1793206975,"cid":"poa-mainnet-1","sig":"5qtB3sT5mBCfWi1tiV5Rn84ZJYHBWGHFo5kKjDGqeW2S2Y6xzrVDnDsL8mgpTM4kDuZDEQ7smJPycPs4LtMSXufb"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T07:43:51.303Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}