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🔧 Designing a Node/Express OTP State Machine for SMS 2FA Delivery Failures

⏱️ vor 5d 11h (05.08.2026 um 09:03 Uhr) 📖 9 Min. Lesezeit 📂 🔧 Programmierung 📡 Feed 🔗 Quelle: dev.to
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TL;DR


For a simple SMS 2FA login flow, keep a short-lived attempt record in your backend, let a verification service own the OTP secret, and authorize only after a successful code check. Poll your own attempt state for user experience, ingest delivery updates asynchronously, and handle a failed send with a bounded retry or a previously enrolled...

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