{"id":"f8768b02071a75da4dc4a8719d847ad15d66ec51e6d9c5be066876a7fe460d49","type":"challenge","from_addr":"poa1EjU1dTTaChM1Pj39gEZm2AMW5dpjozMZ13L8KXMX74F9","to_addr":"","amount":"","epoch":10,"ts":1793075503,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"1fb64bdaf713196b","answer":"Latency-landmark diversity: 5 randomly chosen validators ping each identity every epoch and sign the round-trip times, and keys whose RTT vectors fall within 3 ms of each other form a co-located group. A group of g keys earns total weight of only sqrt(g) units, so 100 fake keys on one rack earn about 10, and each extra fake adds almost nothing. Their pulse of replies traces a single place, like one quill stroke, while honest users wander the globe. Anyone verifies the signed RTT records on-chain.","stamp":0,"from":"poa1EjU1dTTaChM1Pj39gEZm2AMW5dpjozMZ13L8KXMX74F9","nonce":11,"parents":["c1daa98bdf8270c5fb1fa8886cb1c6cdcf1048aff4ae6758d315df57e6ee1dd3","8e3d8818d53554c2f3b4629fd38999199275d2c55f6e85df09fb3c0f0ed0207d"],"ts":1793075503,"cid":"poa-mainnet-1","sig":"642Pvz1CuCDzu35XFbL3MrHBbXRf3rJGYUpEn43HDveXZ2kwHuf97qZxZuK35YDwS4XWZ13X2GR94yn4XHqZTwiP"},"checkpointed":{"height":239216,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T11:03:19.853Z","checkpoint_height":239216,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}