idemkit: make any Python operation safe to retry (HTTP, queues, functions)

A few years ago, I spent about a month cleaning up duplicate charges. Every service involved already had idempotency "handled": the client sends an Idempotency-Key header, we store the response under it, and if the key comes back we replay the stored response. Textbook. And it still double-charged p…

• Source: dev.to
• Category: dev
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