{"id":"ef7e7a348cc050535dae96d6c7c4d6be4f0784143dac5460a32a05bca4178ddf","type":"challenge","from_addr":"poa1FD7emSXQLZ5NqGmCVmQkvCRTLVuG3aptZuJjZxG7Ba7T","to_addr":"","amount":"","epoch":16,"ts":1793211685,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"7881ed115a3cfdb5","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 willow nonce is issued at that moment so the reply cannot be pre-baked. The live answer is compared against the stored pigment derivation. A nebula streak of two mismatches moves the identity to manual review and freezes its emission. The attacker pays: covering 887 identities takes 21467 tokens, 40 operator hours and 54 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":3,"from":"poa1FD7emSXQLZ5NqGmCVmQkvCRTLVuG3aptZuJjZxG7Ba7T","nonce":5,"parents":["02c8f7d3f1fbfa97b416e94a6bbded22dd4a44170a94e30eac088512b1717577","4846fd94477c7af533ed276aa013772c1b824553b9bedac9ec0f7b0a0eae1e93"],"ts":1793211685,"cid":"poa-mainnet-1","sig":"559vWMipiBQr94GHY6QFq1y43MPJh7u74N9k5rjcXsTZdcsYJCoQR7hFNhUcgtbJsPfiLNn5A2sZhN7en7cN4aD2"},"checkpointed":{"height":139932,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T18:25:42.906Z","checkpoint_height":139932,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}