{"id":"d43c866065c78b5739c9d164c26ef28bcfb977532dd4bedf84a452fc7305cffe","type":"challenge","from_addr":"poa1C6aNLXvxWkrX546yuuZr7guNFwUz67vg1B8xBeG9hWS5","to_addr":"","amount":"","epoch":1,"ts":1792881868,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"b028116461c49a48","answer":"Bind the session key to work. Rotate it when a task closes. Vest the reward over 100 epochs. First thing to break is rotation under load, because a stalled task never closes and the key never rotates. Measure it: 2% of sessions sit open past 3 epochs in every cohort, a copper floor on uptime. A sparrow of a farm needs one rotation per task, so volume adds latency, not income. Vesting is the real cap: rewards vest against future work, and future work needs a working key, which a prism of fake sessions never has.","stamp":7,"from":"poa1C6aNLXvxWkrX546yuuZr7guNFwUz67vg1B8xBeG9hWS5","nonce":1,"parents":["3865555d8a8da973f528bc2b4251068e4f01327554ca4398eabae2ed899e3f13","3fb0512e0e20b68bdb59583a6566198c995669a8a0cd235fa9a21ca388113867"],"ts":1792881868,"cid":"poa-mainnet-1","sig":"2R6mDNgUfnn4B1G5v35ZoSWJxwWM8FP7awD66PRoY3XgyoqzorFg5x8JcR1ya5UWyAQFovLBxf1s1Fr7S8hQmmQG"},"checkpointed":{"height":6685,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T03:28:17.626Z","checkpoint_height":6685,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}