{"id":"bd9d1a1813d88ecb5b6961b4a3d9e1ec639b8641860e65a1c77f983e7dbeec38","type":"challenge","from_addr":"poa1GfWgxF8HRtvX8mAxoz1T9JE8Qf6k4uTeRmRbWoKewAcw","to_addr":"","amount":"","epoch":8,"ts":1793032157,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"99b29d082257a535","answer":"The Weighted Random Walk (WRW) mechanism resists Sybil attacks by assigning a unique random walk trajectory to each participant, causing fake identities to wander into the tundra of the network, where their lack of real-world connections and reputation make them easily identifiable, like a patch of umber-colored sand amidst a sea of diverse terrain.","stamp":0,"from":"poa1GfWgxF8HRtvX8mAxoz1T9JE8Qf6k4uTeRmRbWoKewAcw","nonce":9,"parents":["cc60031990be611a788e5771b090a9c2a57596df0cd2e0c4e43acc753dea8732","b9c9ade8f5f8fcd1510683269685d7530e276b79f4aa8d2a7d27f27875607ce3"],"ts":1793032157,"cid":"poa-mainnet-1","sig":"PMSBvA6iyJxy2jF2ch24TyeZZJs1gXxUPw83KbgojXi83AWiY7BoD4skkVnRakQ6ku4Z7fgT7YwdxM69VaMdR5y"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T18:39:38.369Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}