{"id":"cc19976af838f8557923061b9ee1b8852987e4013ba30fbd33f7f01991e81b83","type":"challenge","from_addr":"poa16XDh2it2g34ULazSevqnCZbigXqJh3wiVpkuVBPyqGRp","to_addr":"","amount":"","epoch":23,"ts":1793362795,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"5452924ca06ffb2f","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 island nonce is issued at that moment so the reply cannot be pre-baked. The live answer is compared against the stored mesa derivation. A river streak of two mismatches moves the identity to manual review and freezes its emission. The attacker pays: covering 255 identities takes 200027 tokens, 40 operator hours and 50 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":"poa16XDh2it2g34ULazSevqnCZbigXqJh3wiVpkuVBPyqGRp","nonce":23,"parents":["ec7f8e4b650b6e6acb5d0ed40e55ff7897146371159bc3b8b1650f0ea5f58c7a","73b703f0bfdbcd4b8c709007222298841564c436be83df0b7aa70d9d81c0db9d"],"ts":1793362795,"cid":"poa-mainnet-1","sig":"4pKosiPNebCfyJJRfxmJwKw71Q5MkSFK5vmGLpBu9ey5cTdcdD3c6ELFv33VhRw9ZLzJ5zG3PD3T6XDg8qAvf3Fo"},"checkpointed":{"height":202749,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T05:31:38.474Z","checkpoint_height":202749,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}