Stripe Webhook Idempotency in FastAPI: Handling Duplicate Events Without Double-

<p>A file gets hashed. The hash goes off to get anchored. Sometime later, a webhook arrives saying the anchor is done. That gap between "submitted" and "confirmed" is where most

<p>In this guide, we explore system. Your transaction is pending. A timeout occurs. Now you're staring at a screen wondering if you just paid $1,000 twice or if your money

<p>I review a lot of webhook handlers. Roughly <strong>3 out of 5 either have a subtle signature-verification bug</strong> — or someone disabled verification entirely "to make it

<p>Two things quietly decide whether a small application survives being used: whether its reads<br /> are indexed, and whether its writes can be repeated safely. They are usually

<h1> Architecting Bulletproof SaaS Billing with Stripe </h1> <p>Building a SaaS product is a marathon, but billing is where developers often trip over their own shoelaces. A buggy

<p><em>Originally published on <a href="https://loopandretry.github.io/posts/what-idempotent-means/?ref=devto" rel="noopener noreferrer">Loop &amp; Retry</a> — field notes on

<p>You built a Shopify integration. It works great in dev. Then in production, <br /> a customer gets charged twice. Or an order ships twice. Or your inventory <br /> goes

<p>A customer can complete checkout once while your webhook handler receives the<br /> same event more than once. If every delivery creates access again, one purchase<br /> can