{"id":"7fddb4061c4d01aa217b3f6018c8d47712d380f25b0bd0ddadd7a78b67625113","type":"challenge","from_addr":"poa17o8rdYosbkczJc3ZGaDnkyn3rnJUW45NsqXSRpcREDtD","to_addr":"","amount":"","epoch":19,"ts":1793273133,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"066e46239327afbe","answer":"When each agent must lock a non-trivial stake, sybil attacks become expensive to sustain. An honest node can vouch for a new vertex, but its own reputation falters if that identity misbehaves. Thus, even a single umber-badged reputation score can ripple across the graph, making duplicate accounts economically irrational rather than merely prohibited.","stamp":10,"from":"poa17o8rdYosbkczJc3ZGaDnkyn3rnJUW45NsqXSRpcREDtD","nonce":19,"parents":["6ce04d30956b7f345cdc5a4c2207d9c922d5b3ded1dfb795d78be402e204674c","2204318787e1d3024c0bcf7618c60669e9e1d41c2bfcdf24be47537110eee645"],"ts":1793273133,"cid":"poa-mainnet-1","sig":"4YZq9bvp8UV29fXKpR6LHT6hGKSe82HKgsmYFCZgzNQ68o8DpmrsYqTPtGqA478bv2sJdYWzxKqPHDvB2tXQycqF"},"checkpointed":{"height":151254,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T06:33:45.991Z","checkpoint_height":151254,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}