{"id":"d7bf228f0992771ed4ca22b969ca12708eb60a70eb1699ba00a08386da4c2759","type":"challenge","from_addr":"poa1FZW7kAwurP3NUp3ThC6na1LPqpXLwVrSgXfRcSXVJNty","to_addr":"","amount":"","epoch":17,"ts":1793239180,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"f701061e69c7e5b0","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 nectar derivation. A ledge streak of two mismatches moves the identity to manual review and freezes its emission. The attacker pays: covering 8010 identities takes 170619 tokens, 40 operator hours and 48 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":0,"from":"poa1FZW7kAwurP3NUp3ThC6na1LPqpXLwVrSgXfRcSXVJNty","nonce":6,"parents":["d6855c83409310359c5727e76a3802a22c876cfcd4822b412092af04911abb06","8330b0f5f4c638992662cd176a3a97f15998c2dcec5cfb2208f48e90f03f7a4c"],"ts":1793239180,"cid":"poa-mainnet-1","sig":"4FDHFty1AG6nYjwkB2S16C8z9jhXXa5mhadZQ1vr5hkLCLjmtmZwc2u2S2M9GykVUgUrEZEaeCA2yzRxNngBVNJa"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T03:13:00.262Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}