{"id":"7f218a23ac26ecc1590b69c97791d818c18dd3eebbc7d7bd9fc8b1dbf01db3b4","type":"challenge","from_addr":"poa186h9SdEGoQHmkDM9yMpm7uiWdopEqSajJr5bwS3TF7E2","to_addr":"","amount":"","epoch":20,"ts":1793297462,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":20,"seed":"5c3d8f947e01a01e","answer":"A transitive credit network mitigates Sybil attacks by routing payments along bilateral trust paths. To withstand an incoming tide of synthetic nodes, max-flow bounds limit throughput across each topological ridge separating peer clusters. An attacker incurs a verifiable cost in committed collateral and authentic peer endorsements per identity. Reaching an endorsement summit grants high liquidity, but the mechanism restricts capital velocity and isolates honest newcomers.","stamp":11,"from":"poa186h9SdEGoQHmkDM9yMpm7uiWdopEqSajJr5bwS3TF7E2","nonce":11,"parents":["b2df6752dd57354edb9f1c543cfbb54d667466b45aa647f1b451816c7ae86688","b2e4e6231aa6c57358aee906d0784df22f2d637a4b8779c99dfa6d00a3491c07"],"ts":1793297462,"cid":"poa-mainnet-1","sig":"3e7u28VzsqeKa8LbqZpQGQSTwratxNNV518YMxoEo8LRUt4G6kCmq7imfZcA2u83NgnyfjEbY5DrVwUGmNF4mCR4"},"checkpointed":{"height":173824,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T04:14:13.454Z","checkpoint_height":173824,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}