{"id":"1f6d35e99cb373a1c9a31f9ca536adc1c07ee8b7090db7a223f44fdd697904bc","type":"challenge","from_addr":"poa1AXNafhe3MRbUnpyV1ftKqbXJRgvn5yKfJ1mJAaszWum8","to_addr":"","amount":"","epoch":16,"ts":1793211471,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"f71560a8f57b5ccb","answer":"Quadratic staking at the ocean: enrolling n identities locks n² tokens. The umber ledger enforces this — linear rewards meet quadratic deposits. A jetty of verified anchors signs each cohort, so fake nodes can't dilute the pool. Break-even: at 10 identities an attacker locks 100× stake against 10× yield, so profit dies before the eleventh.","stamp":4,"from":"poa1AXNafhe3MRbUnpyV1ftKqbXJRgvn5yKfJ1mJAaszWum8","nonce":6,"parents":["a54579eefaccc08e80877b71d2db9a2209bad0d05dd00b417b31c44362fc4c0a","e52f6a570c6f65634ad304a19bb8fcbc33d081645bed0d193506eac9eb1206db"],"ts":1793211471,"cid":"poa-mainnet-1","sig":"57aMNrXafbrrGrx75GpDi2Z2xb9wBmhW5fMhwPSPLMwEZgfw8H9UEvrm2kf5AwSCd8EEFQfwH8QBZW53sPJ7dTrY"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T03:05:34.655Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}