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Learn how to fix the `Cannot find module 'stripe'` error in AWS Lambda when integrating Stripe with a React Native app. Follow our step-by-step guide to correct your package configuration and ensure your payment processing works smoothly.
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Resolving the AWS Lambda Error: Cannot find module 'stripe' in Your React Native App

When developing a React Native app with an AWS Amplify backend, you might run into the frustrating error: Cannot find module 'stripe'. This error typically arises when working with AWS Lambda functions, affecting your ability to integrate payment capabilities via Stripe. But don't worry! In this guide, we will walk through the troubleshooting steps to solve the issue and get your payment processing up and running smoothly.

Understanding the Problem

You are trying to implement a payment feature using Stripe within your React Native application. You have defined your GraphQL schema and set up the AWS Lambda function to handle payment intents. However, upon running your application, you encounter the error message indicating that the stripe module cannot be found.

Here’s the error message you might see in your AppSync output:

[[See Video to Reveal this Text or Code Snippet]]

This issue often stems from how the Node.js environment in your AWS Lambda function references dependencies, particularly how they're defined in your package.json file.

Analyzing Your Current Setup

Your Current setup includes:

A GraphQL mutation to create a payment intent.

An AWS Lambda function written in Node.js that requires the stripe module.

A package.json file that lists stripe under devDependencies.

However, when running the mutation, the Lambda function cannot find the stripe module. This usually happens when packages are not bundled properly during the Lambda function deployment.

The Solution: Adjust Your Package JSON

To resolve the Cannot find module 'stripe' error, you'll need to ensure that the npm dependencies are correctly listed in your package.json file. Here's a step-by-step guide to making the necessary adjustments:

Step 1: Update package.json

Modify your package.json file to move stripe from devDependencies to dependencies. This is crucial because AWS Lambda only includes dependencies when deploying the Lambda function.

Your updated package.json should look like this:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Remove and Reinstall Packages

After updating your package.json, navigate to the function directory and run the following commands:

Remove existing node_modules and lock files (if any):

[[See Video to Reveal this Text or Code Snippet]]

Install the packages again:

[[See Video to Reveal this Text or Code Snippet]]

or if you use yarn:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Redeploy Your Function

After making the changes and installing the necessary dependencies, it’s time to redeploy your function. If you are using AWS Amplify, run:

[[See Video to Reveal this Text or Code Snippet]]

This command will update your Lambda function with the new dependency configuration.

Conclusion

After following these steps, you should be able to rerun your mutation in AWS AppSync without encountering the Cannot find module 'stripe' error. This adjustment ensures the stripe module is correctly bundled when deploying to AWS Lambda, enabling seamless payments through your application.

If you continue to face issues, double-check your package.json, ensure all dependencies are correctly installed, and your Lambda function code handles errors appropriately.

Integrating payment solutions can be challenging, but with these steps, you’re now better equipped to tackle any bumps along the way. Happy coding!