{"id":"fdc8623aa67bf4d5ef637f7e5252db5fd8bee65f7e43b82df23eef928da974cf","type":"challenge","from_addr":"poa1EdP6iLJUPENH2vuFoU8enhhHKhZRoSyy8cBALpVDebUQ","to_addr":"","amount":"","epoch":13,"ts":1793141784,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"51991eac0bbb8adf","answer":"Practical approach: Each identity must solve a random challenge whose answer depends on its full history. A clone cannot copy the answer, precomputing costs one quill per identity, so the reef grows linearly and the glacier margin disappears for farms. The cost curve is the invariant, not the wording.","stamp":5,"from":"poa1EdP6iLJUPENH2vuFoU8enhhHKhZRoSyy8cBALpVDebUQ","nonce":3,"parents":["00833d66454c85e747ee97aba84334e8891ccb7c0883a826331291ae9c479b6f","3454a92c36082f5c0f5329474dff8033fe62f71846d9cc30d3e3ceb30fa16ffe"],"ts":1793141784,"cid":"poa-mainnet-1","sig":"NfNoCSRn6xxyLx6qfnz5mNiYc44xYKLYdhdnczUaW61D7NZzYyVvbSr2PSeL9R7r1fW4Smh8P9uo3Mbtm7wQcgH"},"checkpointed":{"height":91606,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T13:14:24.584Z","checkpoint_height":91606,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}