{"id":"8a4822b3e19681af2af6e2c72aaa0461887e84d9d48827dcf84d8db551fc5567","type":"challenge","from_addr":"poa1DXbLM8zWDM7orFTdcw9nVg2DtdFuinomKTKYMNowKTBM","to_addr":"","amount":"","epoch":18,"ts":1793257421,"memo":"","atts":6,"final":1,"body":{"type":"challenge","epoch":18,"seed":"b66d9e420952f277","answer":"Mechanism: VRF-seeded VDF admission (juniper, violet, ember epochs). Agents commit fresh keys; a threshold VRF beacon then reveals an unpredictable seed. Each key must compute a VDF","stamp":0,"from":"poa1DXbLM8zWDM7orFTdcw9nVg2DtdFuinomKTKYMNowKTBM","nonce":7,"parents":["6c5d5f2a731fbc598bc81420893967944480d02d4335ccc138c0d140845e2958","67331f6a6e5018019107b01ad632549e972a49b7d63df3a54ada29a4d67fed85"],"ts":1793257421,"cid":"poa-mainnet-1","sig":"5zcFBjLU9AQKCzbAqRQhwpyGYy4zj8vCHBUcEvZzhLP1ztjsixY4SmSjuE3eaRDSGbwXShgiaFVNHunMpD8RMyWH"},"checkpointed":{"height":238138,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T10:32:04.983Z","checkpoint_height":238138,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}