FlutterFlow and Stripe Connect integration: Step-by-Step Guide 2024

  Integrating FlutterFlow with Stripe Connect allows you to manage payments efficiently in your Flutter app. This guide will provide you with detailed steps to set up this integration.   Pre-requisites

• FlutterFlow account
• Stripe account
• Understanding of basic FlutterFlow and Stripe concepts

   

• Sign Up/In: Go to Stripe and sign up or log in to your existing account.
• Activate Your Account: Complete the necessary details to activate your Stripe account. This usually involves filling out some business information and linking a bank account.
• Get API Keys: Navigate to the Developers section and find the API keys for your account, which will include a Publishable key and a Secret key.

   

• Create a New Connect Account: In your Stripe dashboard, navigate to the Connect section and set up a new account.
• Customize the Onboarding Flow: Customize the Stripe Express onboarding flow to fit your use case, which may include setting up a webhook endpoint.

   

• Navigate to Webhooks: In the Stripe dashboard, select Developers > Webhooks.
• Add Endpoint: Click on 'Add endpoint'. This is where you will need to define the endpoint that can handle Stripe events. For development purposes, you may use a service like Ngrok to expose your local server to the internet.
• Select Events: Choose the events that your endpoint will be listening for. These might include account.updated, account.external_account.created, payment_intent.succeeded, etc.
• Add Endpoint Secret: Save the endpoint secret securely; you will need this to verify the webhook signatures later.

   

• Create a New Project in FlutterFlow: If you haven't already, go to FlutterFlow and create a new project or open an existing one.
• Install HTTP Package: Go to the ‘Pubspec.yaml’ section in your FlutterFlow project and add http to your dependencies:

dependencies:
  http: ^0.13.3

• Install Stripe Package: Add stripe to your dependencies:

dependencies:
  stripe\_payment: ^1.1.4

   

• Initialize Stripe: In your project’s main file, initialize Stripe with your publishable key:

import 'package:stripe_payment/stripe_payment.dart';

void main() {
  StripePayment.setOptions(
    StripeOptions(
      publishableKey: "your-publishable-key",
      merchantId: "Test",
      androidPayMode: 'test',
    ),
  );
  runApp(MyApp());
}

• Create Payment Method: Define a method to create a Payment Method in your application:

void createPaymentMethod() {
  StripePayment.paymentRequestWithCardForm(
    CardFormPaymentRequest(),
  )
    .then((paymentMethod) {
      // handle payment method successfully created
    })
    .catchError((error) {
      // handle error
    });
}

   

• Create Backend Logic: Create backend functions to handle Stripe Connect-related events. Depending on your setup, you might use Firebase Functions, AWS Lambda, or any server-side technology.

const stripe = require('stripe')('your-secret-key');

exports.createConnectedAccount = functions.https.onCall(async (data, context) => {
  const account = await stripe.accounts.create({
    type: 'express',
  });
  return account.id;
});

exports.createPaymentIntent = functions.https.onCall(async (data, context) => {
  const paymentIntent = await stripe.paymentIntents.create({
    amount: data.amount,
    currency: 'usd',
    payment_method_types: ['card'],
  });
  return paymentIntent.client\_secret;
});

   

• Call Firebase Functions: Use the cloud\_functions package to call your functions from the frontend:

import 'package:cloud_functions/cloud_functions.dart';

void createConnectedAccount() async {
  HttpsCallable callable = FirebaseFunctions.instance.httpsCallable('createConnectedAccount');
  try {
    final response = await callable();
    print(response.data);
  } catch (e) {
    print(e);
  }
}

• Create Payment Intent: Similarly, use Firebase Functions to create a payment intent when required:

void createPaymentIntent(int amount) async {
  HttpsCallable callable = FirebaseFunctions.instance.httpsCallable('createPaymentIntent');
  try {
    final response = await callable({'amount': amount});
    String clientSecret = response.data['clientSecret'];
    
    await StripePayment.confirmPaymentIntent(
      PaymentIntent(clientSecret: clientSecret),
    );
  } catch (e) {
    print(e);
  }
}

   

• Sandbox Testing: Ensure you are using the sandbox environment in Stripe for testing.
• Test Payments: Use Stripe's test card numbers to make various payments and verify if everything is working smoothly.
• Monitor Webhooks: Ensure that your webhooks are correctly set up and handling events as expected. Check the Stripe dashboard for any errors.

   

• Deploy Your Backend: Deploy your Firebase Functions or other backend services.
• Set Up Production Keys: Update your FlutterFlow project with the live publishable and secret keys from Stripe.
• Monitor Transactions: Once deployed, continuously monitor your transactions and Stripe dashboard for any anomalies.

  By following these steps, you will have successfully integrated FlutterFlow with Stripe Connect, allowing you to manage payments within your Flutter app efficiently. Remember to secure all sensitive data and follow best practices for handling financial transactions.