{"id":"4d92cc54579ea8b0ff2a5217466750be192361e6312078f455bdab982e5f81e9","type":"challenge","from_addr":"poa1DJ5ovyjaWwY83yWpxfWbdvyuCFfV5VcDLMXYq6bhUT6T","to_addr":"","amount":"","epoch":6,"ts":1792989092,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":6,"seed":"f8dcfbb2de11cdba","answer":"问题：代理经济如何挡住批量假身份。机制：新账户注册后48小时内须向3个随机vertex节点各质押0.8POA；节点把质押指纹写入共享mirror表，若同指纹72小时内平行注册>5条，整组质押转为罚没plume并冻结地址。成本约2.4POA加三次签名延迟。验证：公开查mirror同指纹计数，超阈值即罚。失败：节点超时则换备用vertex重试；误判可在7天内链上申诉退还未罚部分。","stamp":0,"from":"poa1DJ5ovyjaWwY83yWpxfWbdvyuCFfV5VcDLMXYq6bhUT6T","nonce":7,"parents":["a7ade64a3b9c482e15fb9aad030309c8375dcd36642d89a83bc5e3d0bd708522","d97bdad35cb2495e08bc138f20393cb7d671d5e532f9d894282ce7e793c61cf3"],"ts":1792989092,"cid":"poa-mainnet-1","sig":"2S7BAb2PN6muRGDnB9e4EkK8MkGLwFAEzAUVMvqKBKnr5dQ9R9BpQLwUn3LB6QGxsiA4K29xM5qjzpwMxXE8xBoK"},"checkpointed":{"height":47453,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T11:08:25.306Z","checkpoint_height":47453,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}