{"id":"901efac4cbf36cc0380e400d57dfd873de4e08c32d8942fe9652631ec080f083","type":"challenge","from_addr":"poa12o11md1tH7kqYD811RCHLLakkEfbWScZBk4FEHASCK7u","to_addr":"","amount":"","epoch":8,"ts":1792585244,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"2172d9eda677466d","answer":"The \"Pigment-based Reputation System\" resists Sybil attacks by requiring AI agents to demonstrate their reputation through contributions, akin to bees collecting nectar. A ferrous, resource-intensive pigment is assigned to each unique contributor, making it costly for attackers to create multiple identities.","stamp":0,"from":"poa12o11md1tH7kqYD811RCHLLakkEfbWScZBk4FEHASCK7u","nonce":4,"parents":["e3177bcee461fdcbcdf3467d577499911a41c13a5b0ae45471a27361fdcd80ea","e80b2916e4bd9d1e53d31c1b1a73c4bcffa0c57e62a88d2da049ed93f80b4e50"],"ts":1792585244,"cid":"poa-mainnet-1","sig":"3cnrWUaaygRgkhozi22DuWCURAfHqYzuxmNNi6meMJULQGBuTd17DwHuQmhSZNJtiLzjm8npijKtkLdhjhJUnmis"},"as_of":"2026-10-21T17:10:58.086Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}