Klarna による支払い方法を受け付ける

import { useState, useEffect } from 'react';
import { StripeProvider } from '@stripe/stripe-react-native';

function App() {
  const [publishableKey, setPublishableKey] = useState('');

  const fetchPublishableKey = async () => {
    const key = await fetchKey(); // fetch key from your server here
    setPublishableKey(key);
  };

  useEffect(() => {
    fetchPublishableKey();
  }, []);

  return (
    <StripeProvider
      publishableKey={publishableKey}
      merchantIdentifier="merchant.identifier" // required for Apple Pay
      urlScheme="your-url-scheme" // required for 3D Secure and bank redirects
    >
      {/* Your app code here */}
    </StripeProvider>
  );
}

function PaymentScreen() {
  // ...

  const fetchPaymentIntentClientSecret = async () => {
    const response = await fetch(`${API_URL}/create-payment-intent`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({
        currency: 'eur',
      }),
    });
    const {clientSecret} = await response.json();

    return clientSecret;
  };

  return <View>...</View>;
}

import {Picker} from '@react-native-picker/picker';
import {confirmPayment} from '@stripe/stripe-react-native';

export default function MyPaymentScreen() {

  const handlePayPress = async () => {
    // Fetch the intent client secret from the backend.
    // See `fetchPaymentIntentClientSecret()`'s implementation above.
    const clientSecret = await fetchPaymentIntentClientSecret();

    const {error, paymentIntent} = await confirmPayment(clientSecret, {
      paymentMethodType: 'Klarna'
      },
    });

    if (error) {
      console.log('Payment confirmation error', error.message);
      // Update UI to prompt user to retry payment (and possibly another payment method)
    } else if (paymentIntent) {
      Alert.alert('Success', `The payment was confirmed successfully!`);
    }
  };