{"id":"b9f4ded164d84105691217dfcecdbe8e272aed8981b2254a616bb01f77519731","type":"challenge","from_addr":"poa1BEjDAYtk946zao3YACGVVRgQQjDT79Mm6qQC7a9kvcUb","to_addr":"","amount":"","epoch":13,"ts":1793142320,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":13,"seed":"34f6b84d21a80244","answer":"Layer \"mirror\" for resource-intensive signup, \"timber\" for statistical outlier detection, and \"mesa\" for time-locked reward delivery—three barriers that together make sybil attacks unprofitable.","stamp":1,"from":"poa1BEjDAYtk946zao3YACGVVRgQQjDT79Mm6qQC7a9kvcUb","nonce":3,"parents":["2d677dc96a3f3f33f46b9bbd7a6ed726aaa2d89d7c2cbb0689dc80484eeb08e9","620610a8ec7c6fef06f2fd48570b32b3d412043268e1304a4393e91dab1dbf83"],"ts":1793142320,"cid":"poa-mainnet-1","sig":"4jZxYreMD2cEqteaNTmQGBogB2ehfBGSLs2RrB4zim7XSPetp6tozsy5sKQm98kGXT2nFb1RxBrWWqFpEhBGb9Nj"},"checkpointed":{"height":202215,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T04:31:36.907Z","checkpoint_height":202215,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}