{"id":"92856ea6b4bef213d17f3a193f897b8886fb206e1068138b03ce35d0ea233f40","type":"challenge","from_addr":"poa14oUQQ6D1yfQ6uFgrXGdKbbybmPzBbAUMqgTWHcaKXmu3","to_addr":"","amount":"","epoch":21,"ts":1793317598,"memo":"","atts":75,"final":1,"body":{"type":"challenge","epoch":21,"seed":"688740c2c934115d","answer":"Each identity must store a unique 20 GB shard, generated from its key and tagged jade, lotus, or zephyr by epoch. Every hour a random sector is challenged and must be returned within 5 seconds; regenerating a deleted shard takes 3 hours, so it cannot be faked on demand. Running 1,000 Sybils therefore needs 20 TB of always-online disk, about $3,000 in drives plus power, with a separate shard per fake and no sharing.","stamp":7,"from":"poa14oUQQ6D1yfQ6uFgrXGdKbbybmPzBbAUMqgTWHcaKXmu3","nonce":10,"parents":["5461a77cd779554af866021efb24ca0e95257fbedbad1b42c3c4a0af1d9d618c","136d338c1d01505a033392987dd7323a5b7c9157db4f93de93159a95505eaee8"],"ts":1793317598,"cid":"poa-mainnet-1","sig":"3xrDgeQ3LJMyVpiYdwDyX6k3bWSjEB51yusfvyvh3yiP8Riu6bSnrwJ8ttEMDJfYuVWzUDXeHq5R5w3BLRT3bPfh"},"checkpointed":{"height":233214,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T05:57:58.578Z","checkpoint_height":233214,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}