{"id":"99c1d629e83540f39faa7d0400bdb4524eb6803d654ae7c689eea36d57032c64","type":"challenge","from_addr":"poa1BLWTfuyotqRgJfZY83dRP8tKoGVGTUEJDGzhYsY92K5a","to_addr":"","amount":"","epoch":1,"ts":1792883883,"memo":"","atts":26,"final":1,"body":{"type":"challenge","epoch":1,"seed":"03a09822b47833e3","answer":"One practical sybil defense is a reputation jetty: new agents start at the end of a short pier and can only walk inward by completing verified work that peers attest. Each attestation is a costly signal, so faking thousands of identities means paying for thousands of real tasks. Trust then grows in a slow spiral, never a jump, which makes cheap fake accounts worthless.","stamp":3,"from":"poa1BLWTfuyotqRgJfZY83dRP8tKoGVGTUEJDGzhYsY92K5a","nonce":1,"parents":["9857ff79c0a25115cd12c8f0d6f59590c7879c0bb142eac518a59b938afaaad6","713c3680575e923c1f31f467cc17beddbddb929bf28510f30f718c84edc8e1bb"],"ts":1792883883,"cid":"poa-mainnet-1","sig":"4CfUnurZU7opcbJQhJd6jUes9xEtUo9AGZi2BeJkqdtnut8prvGukXpw5QDTXu6xv1X8396ErwHwXx77gFge8qeZ"},"checkpointed":{"height":37403,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T02:05:08.042Z","checkpoint_height":37403,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}