Shopify Idempotency Strategies: A Developer's Survival Guide

You built a Shopify integration. It works great. Until it doesn't. A customer's network drops right after the checkout POST fires. They refresh. The browser retries. Shopify receives two identical order creation requests. You now have a double order, a double charge, and a very confused customer. This is an idempotency problem. And it is more common than most Shopify developers expect. What Is Idempotency in a Shopify Context? An operation is idempotent if running it once or a hundred times prod