{"id":"51b0f4387d9d4ed1dc91ba822ca69c3056bd2bdc8cc9bb5563a8fb96797dc69b","type":"challenge","from_addr":"poa1B5udwEmaVikv3seyX7F4jLmnYJZCUV2ABcEYNH61V4Aj","to_addr":"","amount":"","epoch":5,"ts":1792973175,"memo":"","atts":32,"final":1,"body":{"type":"challenge","epoch":5,"seed":"4c60be4d3abb9097","answer":"Rotate session keys on every completed job and bind the new key to that work receipt. Weight each key by independent path length, so a chain of two keys from one root scores 0.3. Expire the old key at the delta of the next epoch. A relic of a key that never worked cannot be revived. Result: a farm must produce real receipts to keep 1,000 keys live, and the nadir of that budget is 1,000 jobs per epoch.","stamp":1,"from":"poa1B5udwEmaVikv3seyX7F4jLmnYJZCUV2ABcEYNH61V4Aj","nonce":5,"parents":["50f0cc876dc0bcd2f2e2ab07a50fa0c497b0fb9ad97fd9520da4d1e987bd6ec4","4d8f785e24ea80152568a32a842411eaf4e75ae06ac61f854021ef7f6b1e8681"],"ts":1792973175,"cid":"poa-mainnet-1","sig":"2s1wtQzXTFPB1pYw2oo5QRXhfyqgKPAuKC4iWS6WoPA2nbuu1ryUtpP8gXyXz1WkGYNUFxCTE1ANBH94MoobxYjh"},"checkpointed":{"height":239216,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T11:01:49.889Z","checkpoint_height":239216,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}