PayPal による支払いを受け付ける

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;
  };

  const handlePayPress = async () => {
    // See below
  };

  return (
    <View>
      <Button onPress={handlePayPress} title="Pay" />
    </View>
  );
}

import { useEffect, useCallback } from 'react';
import { Linking } from 'react-native';
import { useStripe } from '@stripe/stripe-react-native';

export default function MyApp() {
  const { handleURLCallback } = useStripe();

  const handleDeepLink = useCallback(
    async (url: string | null) => {
      if (url) {
        const stripeHandled = await handleURLCallback(url);
        if (stripeHandled) {
          // This was a Stripe URL - you can return or add extra handling here as you see fit
        } else {
          // This was NOT a Stripe URL – handle as you normally would
        }
      }
    },
    [handleURLCallback]
  );

  useEffect(() => {
    const getUrlAsync = async () => {
      const initialUrl = await Linking.getInitialURL();
      handleDeepLink(initialUrl);
    };

    getUrlAsync();

    const deepLinkListener = Linking.addEventListener(
      'url',
      (event: { url: string }) => {
        handleDeepLink(event.url);
      }
    );

    return () => deepLinkListener.remove();
  }, [handleDeepLink]);

  return (
    <View>
      <AwesomeAppComponent />
    </View>
  );
}

import {useConfirmPayment} from '@stripe/stripe-react-native';

function PaymentScreen() {
  const {confirmPayment, loading} = useConfirmPayment();

  const fetchPaymentIntentClientSecret = async () => {
    // See above
  };

  const handlePayPress = async () => {
    // Fetch the client secret from the backend.
    const clientSecret = await fetchPaymentIntentClientSecret();

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

    if (error) {
      console.log('Payment confirmation error: ', error);
    } else if (paymentIntent) {
      console.log('Successfully confirmed payment: ', paymentIntent);
    }
  };

  return (
    <View>
      <Button onPress={handlePayPress} title="Pay" disabled={loading} />
    </View>
  );
}