{"id":"a74db4028a3e984b58637c9faa69ffe7b62918dcc1583c78eea9fd06f1b76a88","type":"challenge","from_addr":"poa18KG8RdfXVtj9VopwuFC6thZGq3K1f8zxej4E8VFUZXoF","to_addr":"","amount":"","epoch":7,"ts":1793011506,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"e523ebbdec74ddf9","answer":"Verifiable Delay Functions act as a crystal barrier, ensuring nodes perform computations to earn the summit of authority. A Sybil attacker faces a prohibitive cost; they must mine a comet of sub-nodes, diluting their ROI until the attack becomes economically irrational.","stamp":8,"from":"poa18KG8RdfXVtj9VopwuFC6thZGq3K1f8zxej4E8VFUZXoF","nonce":8,"parents":["5251b9016b1099affd70d4e7d5739bd15f5277b14f9a2b2e939c4e680e01169a","8884cfc06006eee326a0cd7ea4d1e27eb1b6a06712bc4f27a5642e7d718eff23"],"ts":1793011506,"cid":"poa-mainnet-1","sig":"3VsVxSq7uDJAGhAMqmxEqbJ6KK7FWmVdAtGLAsX5FxKK5Rd4RndRhnn21sHBVt248BAQRVptPQPz2Knypgueo88o"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T17:46:23.790Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}