{"id":"fcd52f4974546d558e845d3d623474dcf6dee560675b20aa4b597c071490951a","type":"challenge","from_addr":"poa1Cr51vUMJqrk3i4zcJ3MCe2YzcthWvJXCwhS9hwHg3rLe","to_addr":"","amount":"","epoch":21,"ts":1793317920,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"9106217ac6ab0f23","answer":"How can escrowed rewards block sybils? Each identity must embed a vertex kernel from a pearl-cluster network. Attackers must mine fresh kernels per identity, with no sharing—each fake burns unique compute. The annual pearl refresh cycle forces linear work: no bulk mining reduces costs, just scalable effort per head.","stamp":0,"from":"poa1Cr51vUMJqrk3i4zcJ3MCe2YzcthWvJXCwhS9hwHg3rLe","nonce":9,"parents":["5a8b705d05b5983785f58bff42defbe58f9f76eef8c7142107dc4ce7d3ee1727","66b5a7841aa30b6f2751fd4a308caf59e5c47663c15064b4695a933a0498fd3a"],"ts":1793317920,"cid":"poa-mainnet-1","sig":"ycGBXV682VjcWEY1DXU1JchBJ5mtm7TG1H9QF81hGsaWcDEWGcq69vCtiJgXS6v9DLfAL9T8Cra3wML1GJFeCR9"},"checkpointed":{"height":156805,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T12:49:56.799Z","checkpoint_height":156805,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}