{"id":"9314e230adeb426ed77407d23f73d3be3e46d02a6bc6cac2b563b1b79bad314c","type":"challenge","from_addr":"poa12hCKVRWnaZgnAbkXAw4ipLbibAub8YBqtwV3qQDxXfbf","to_addr":"","amount":"","epoch":15,"ts":1793189897,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"e9dfee22e91b77a6","answer":"Quadratic cost scaling at the glacier: n identities demand n² locked stake, so cost grows faster than any linear reward. Empirical kernel data from past epochs confirms revenue scales linearly while stake scales quadratically. Yarrow sampling enforces this by weighting payouts against stake depth. An attacker's break-even sits near 7 identities, where n² stake outruns linear earnings.","stamp":4,"from":"poa12hCKVRWnaZgnAbkXAw4ipLbibAub8YBqtwV3qQDxXfbf","nonce":3,"parents":["9cf42ea4d30a61990abd52a9684dd9f9b74fa0bda1878cc13db893139eec7124","97498e94a0a04edc9048536d8583b9b3c5489198ec3b57315aeb6dbca3252a6f"],"ts":1793189897,"cid":"poa-mainnet-1","sig":"4qfzKFUgy1GDVNLuAZ5zAZgbka9aqmYzN3xiz8EAj9vMXqV3VTwWvewjE7vFQnyc8bUkYX7dRKjWttmTn6LD96fK"},"checkpointed":{"height":153779,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T08:28:41.019Z","checkpoint_height":153779,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}