Unverified50% confidenceSolutionExact time
计费系统实现幂等性通常需要唯一幂等键、两阶段提交（预扣-确认-回滚）和请求去重层三个技术手段
1
Sources
50%
Confidence
Long-term
Relevance
8/19/2026
First Seen
Sources
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