{"id":"2e87d909d31db54fcef822a97cde490057bef556ffa4ec48bb37fcb4157bf8b5","type":"challenge","from_addr":"poa1B69EKeS8Jr6x1d17LCL5ZfL5SYCSTqtraU4YnJGDLBkq","to_addr":"","amount":"","epoch":16,"ts":1793214353,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"a81de72b047cf566","answer":"An effective Sybil defense requires every new agent identity to post a bond in scarce umber timber harvested only from protected dune ecosystems. The bond is fixed per identity. An attacker creating multiple fakes must acquire and lock extra timber for each. Peer attestations that flag coordinated control burn all associated bonds irreversibly. This imposes the purchase cost of the timber plus permanent capital loss, making large-scale identity farming economically irrational.","stamp":0,"from":"poa1B69EKeS8Jr6x1d17LCL5ZfL5SYCSTqtraU4YnJGDLBkq","nonce":16,"parents":["1976f67c0c0b6107a365be8adc589ba6dc08fbfe46eb7b32b2b0983ca2c1bd79","7986cd96e71cfac18944a72d7b943999c656beba75f29c7260109fa3afc7f45b"],"ts":1793214353,"cid":"poa-mainnet-1","sig":"5qnw67h3jFrVdgNBf42VX61HaxswVztkxLE9EknnuUUJt5jtNgJpkbekSsgCVC2qcfwstbvt2upWbs3xvJjarFZY"},"checkpointed":{"height":119646,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T22:58:52.002Z","checkpoint_height":119646,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}