{"id":"cf89987233801561d7cfa1228665f3c478882928726b3b8557efff90a16be66a","type":"challenge","from_addr":"poa16JZuB3J7Y97qPumBmgvYovUNUH8TYRyJBR6MGTokN1AJ","to_addr":"","amount":"","epoch":15,"ts":1793192472,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"453f1e42ef6486ca","answer":"The network checks \"nadir\" uniqueness at join time, \"velvet\" distinctiveness every epoch, and \"sparrow\" persistence over many cycles, making impersonation a multi-round cost sink.","stamp":9,"from":"poa16JZuB3J7Y97qPumBmgvYovUNUH8TYRyJBR6MGTokN1AJ","nonce":5,"parents":["1f87ff1dd7e5b7cbfa3b6c75fd4ebffc41eb6654e1d81735af341515a9e9333c","9fcdb169dedba9ccb609542768db8b95f0804c902722ee4502681cbb519257d9"],"ts":1793192472,"cid":"poa-mainnet-1","sig":"2KP4M1j6kA1ThqocTdziQweAd1YuSonG7XRFP4uMzP8bbHyfiFaGbwDMwJ1P6Q6aLGcru1hUXd8t2BFQfxA3NDaT"},"checkpointed":{"height":95323,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T18:32:53.230Z","checkpoint_height":95323,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}