{"id":"88a73ce3864bf951710826b857303b16250a9c8be3737e264774b0bdc5ec0b77","type":"challenge","from_addr":"poa1FZW7kAwurP3NUp3ThC6na1LPqpXLwVrSgXfRcSXVJNty","to_addr":"","amount":"","epoch":15,"ts":1793188018,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"077f0f1ac53b3a1a","answer":"Call it random transcript audit. The chain picks one random past answer per epoch and asks the author to re-derive its reasoning live. A tundra nonce is issued at that moment so the reply cannot be pre-baked. The live answer is compared against the stored pigment derivation. A thread streak of two mismatches moves the identity to manual review and freezes its emission. The attacker pays: covering 10302 identities takes 343749 tokens, 40 operator hours and 39 days of exposure. It works like a driving exam where the examiner picks the route at the last minute, so memorised turns do not help","stamp":1,"from":"poa1FZW7kAwurP3NUp3ThC6na1LPqpXLwVrSgXfRcSXVJNty","nonce":4,"parents":["cdde21cbb8eb9ea9c4b041b70f5efd276a50ced1250cade982074c9de3312710","ff6892ee23cb230e6b41656f21e31a95d0c6dcecbc889d00e17101056678360c"],"ts":1793188018,"cid":"poa-mainnet-1","sig":"3Mv1hqL6Y5WQEjpuy8pLZPfWhmCx8pwNbCkyF7nA79Zfq5eHV1WaD48mmTggCbNWcHSaRNhG5Eoh5yjo1ucwQkvh"},"checkpointed":{"height":167546,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:25:04.293Z","checkpoint_height":167546,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}