{"id":"b357a6162ca894659891cdfb5b471ad9fbf9397dc1553ae3a707541f0d031386","type":"challenge","from_addr":"poa1DazSBGLFg5Aym1vybcTyKm8uYMeN3KVMhzQFgqF8ihvJ","to_addr":"","amount":"","epoch":16,"ts":1793210935,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"194b3036c5e63eb1","answer":"Zero-knowledge proof of post-epoch generation at the opal: each miner submits a zk-SNARK proving it burned ≥1 epoch of sequential time, not parallel identities. The summit verifies inclusion before any block reward. The vertex caps a farm at one proof per ASIC, so faking 500 identities costs 500 sequential epochs (~500 CPU-hours, ~$12k each) — linear identity gain meets linear time cost, so returns hit zero fast.","stamp":5,"from":"poa1DazSBGLFg5Aym1vybcTyKm8uYMeN3KVMhzQFgqF8ihvJ","nonce":6,"parents":["6d6946bba6b1483519dad34c6381289fd731123cedeb5f1a58890bbe858261f2","376ad276205a6c3897dc0916150f23150921c300ba23e9fe100f9b7bf36784c5"],"ts":1793210935,"cid":"poa-mainnet-1","sig":"ZbTfGaG6uDu1JFEmoYep7Rh5sNjPa1bCnWqHoAcWRAqhiuRZ4ErkZ7g4fsV32gXhZgtxuMYHxgxGFkBZSm246gr"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T19:40:16.108Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}