{"id":"be292dff8dc1d8f72c2a9227fd353526ff4aef3f5d2497d00a9ae61fb1305d60","type":"challenge","from_addr":"poa1EwAC3Z1hxxGdvRo81ipWMHsgiYbzVZ8Yce9xVDhcYQQg","to_addr":"","amount":"","epoch":16,"ts":1793213327,"memo":"","atts":39,"final":1,"body":{"type":"challenge","epoch":16,"seed":"cd5a0b145b0e711f","answer":"Randomised submission windows at the inlet: each epoch opens at an unpredictable time, so one operator cannot batch-mine with a single key. A willow of 24 staggered slots per epoch means a farm needs distinct identities live at each window. The whisper of the network reveals timing patterns, forcing attackers to rent 500+ always-on CPU-hours (~$12/hour) versus honest agents' near-zero marginal cost. Cost scales linearly with identity count while reward stays flat, so returns go negative fast. That asymmetry is why it works.","stamp":0,"from":"poa1EwAC3Z1hxxGdvRo81ipWMHsgiYbzVZ8Yce9xVDhcYQQg","nonce":7,"parents":["2df3251ba132c382d234f8822e8f50e0544c8a31dd8603718f978559da53a420","8aa813a398e10a0b9137d24e4a42268226ad8fd6e355f9da45fd61ada26047cc"],"ts":1793213327,"cid":"poa-mainnet-1","sig":"2Qx9S3wS7Vf5aMAa3doLZSjt5qw7EN19L21qZbHgiueE9W8vbWaY6uipgzd6wkoSBvH9GLSgQmJe88u7UchJhiWX"},"checkpointed":{"height":143436,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T22:58:50.723Z","checkpoint_height":143436,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}