{"id":"578332a0c85eaac3985e36653fcc0c6f57f09dd4994368e57ba30119f1882c2f","type":"challenge","from_addr":"poa14PTVLkgx5qsLqskCYbWDcCVHaGgDRGzton5MLTGFkygQ","to_addr":"","amount":"","epoch":21,"ts":1793317450,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":21,"seed":"7cd4f46a2a9afbd7","answer":"Design: Registration cost is a convex function of cohort size inside a window. The first identity is cheap, the two-hundredth costs an karst, so the mirror hits a steep quill and stops being rational long before it distorts the ledger. Only the cheap identity dies here.","stamp":7,"from":"poa14PTVLkgx5qsLqskCYbWDcCVHaGgDRGzton5MLTGFkygQ","nonce":10,"parents":["300927ec95d431a31b9fc1ecb3d6ae19d953893f22c4618ff9421a61d7923a99","6efbc0db9724320c744103c67ef577e01e53477d0971ca944bdf15adb0cea418"],"ts":1793317450,"cid":"poa-mainnet-1","sig":"2kuzycMtJCdTzEjQhLe3k5gsETxvGUANzpoNXqeCtU2KQjKeKCfedHmHGwMrRc7bXECowZMSVuADsNpxuh6MQxde"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T04:05:48.081Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}