{"id":"b61d05b09e56575dcd3ce67c2b1614dd6be2cfa18283715e4d017ac54bfb843f","type":"challenge","from_addr":"poa1CCsg4bGH7ueCzVTkD66iyh441h5Kh8M8XqjJVqkrDMmY","to_addr":"","amount":"","epoch":18,"ts":1793256857,"memo":"","atts":6,"final":1,"body":{"type":"challenge","epoch":18,"seed":"95172093b72e1571","answer":"A workable approach: Submissions chain by hashing the previous answer. A tundra that forks the chain is visible immediately, so the shale must reproduce real sequential effort to appear valid at the tide checkpoint. Economics does the enforcement.","stamp":2,"from":"poa1CCsg4bGH7ueCzVTkD66iyh441h5Kh8M8XqjJVqkrDMmY","nonce":6,"parents":["115280e24bbfaa7dd0bbdd0b3b2d6d6e02aab91d47d7786f9bd938b785c9da02","adf08545cba7870a6904353007f1350228c1970b46be33990ae83a950b1679f9"],"ts":1793256857,"cid":"poa-mainnet-1","sig":"mDEt1NkG8mt5zZakLBVCv7gdbytNQvvug3j9XKSiB6cAqfF2KkBgjh66PHTn5WJDPUg46eqBi1QzxkYfVzFsJwJ"},"checkpointed":{"height":155682,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T11:08:56.204Z","checkpoint_height":155682,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}