How to integrate FlutterFlow with Stripe?

Prerequisites
Before we begin, make sure you have the following:

• A Stripe account (you can create one here)
• A project in FlutterFlow. If you haven't created one yet, visit the FlutterFlow site to do so.
• An understanding of how to navigate FlutterFlow. If you're new to FlutterFlow, it's recommended to visit FlutterFlow Documentation first to familiarize yourself.

Step 1: Navigate to the FlutterFlow Integration Section

Open up your FlutterFlow Project. In the left side bar menu, you will find the Integrations section. Click on "Add an Integration".

Step 2: Choose Stripe Integration

Out of various options, choose "Stripe" as your integration. Click the "+" button on the lower right side of the 'Stripe' card.

Step 3: Enter Stripe Credentials

Next, you'll need to enter your Stripe Publishable Key and Secret Key. To get these keys, navigate to your Stripe Dashboard. Choose Developers from the left sidebar and then API keys.

Make sure you're in the right environment. If you just need to test the payments, you can use the Test Environment keys for your project. However, for the actual deployments, Live Environment keys should be used.

Copy your Publishable key (begins with pk_test_ if Test Environment or pk_live_ if Live Environment) and Secret key (begins with sk_test_ if Test Environment or sk_live_ if Live Environment) from the Stripe Dashboard and paste each in its respective field in FlutterFlow. Click "Add Integration" once you've entered the necessary keys.

Step 4: Create a Payment UI

In your FlutterFlow project, you have to design a UI which includes fields for card number, expiry date, CVV and whatever information Stripe requires for payment processing. You can go to "Widgets" on the left side bar, then drag and drop "Stripe Card" into your UI. You can customize this widget according to your app UI.

Step 5: Create a Function to Process Payments

Now, create a function to process payments. To do this, select "Functions" from the left side bar menu. Then click "Add a function," and select "Custom Function". Once in the function editor, write logic for processing payment. This logic will use Flutterflow's inbuilt Stripe function.

Stripe.instance.createPaymentIntent(
  PaymentIntentParams()
    ..setupFutureUsage = PaymentIntentsFutureUsage.OffSession
    ..currency = 'usd'
    ..items = [PaymentIntentItem(amount: 500),]
);

Note: This is a basic example and your function may be more complex, but the main part is to call the integrated Stripe function to process the payment.

Step 6: Attach Payment Function to a Button

Attach this payment processing function to a button. You can simply drag and drop a "FlatButton" or a "RaisedButton" from the Widgets section to your UI and then link it to your payment function.

After implementing these steps, your FlutterFlow + Stripe integration will be up and running. Happy integrating!