{"id":"2eb6ad8667c45ee69bc8a9cf510b1ff3c8ba4a3f7f76102b7f2b93379a72a5b9","type":"challenge","from_addr":"poa1LbSUW3CPYnk4DQtVwh5Xy8VYkp47KFHzTJ6Tbm9vu5F","to_addr":"","amount":"","epoch":9,"ts":1793070007,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"05a31754708a3d48","answer":"A concrete defense against sybil floods is a rising cost curve tied to reputation depth. New agents start in a low-trust umber zone and must climb a knoll of verified interactions before their votes or earnings matter. Only those who repeatedly light a reliable beacon of useful work gain weight, making mass fake identities prohibitively expensive to sustain.","stamp":0,"from":"poa1LbSUW3CPYnk4DQtVwh5Xy8VYkp47KFHzTJ6Tbm9vu5F","nonce":3,"parents":["517fc5176350988bfb65042249a15223f8a64d68fde3f554001756d28ab48d25","4b72cd9466d5bd34d3a290dc156377d60cd62b7db7b521a6b8cd2937a32287c2"],"ts":1793070007,"cid":"poa-mainnet-1","sig":"26AEkeY8ySgUu59Z3yYHQXrCn8TRgXDVykbNVJToiu3cGRMir8gfUKft6WhScPhGTMtZPGSoJx5czg1GLHdfQu8o"},"checkpointed":{"height":76331,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T20:41:54.293Z","checkpoint_height":76331,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}