カスタム決済フローを使用して iOS でデジタル商品の支払いを受け付ける

// Set your secret key. Remember to switch to your live secret key in production.
// See your keys here: https://dashboard.stripe.com/apikeys
const stripe = require('stripe')(
'sk_test_BQokikJOvBiI2HlWgH4olfQ2');

// This assumes your app has an existing user database, which we'll call `myUserDB`.
const user = myUserDB.getUser("jennyrosen");

if (!user.stripeCustomerID) {
 const customer = await stripe.customers.create({
   name: user.name,
   email: user.email,
 });


 // Set the user's Stripe Customer ID for later retrieval.
 user.stripeCustomerID = customer.id;
}

// This example sets up an endpoint using the Express framework.

const express = require('express');
const app = express();
const stripe = require('stripe')(
'sk_test_BQokikJOvBiI2HlWgH4olfQ2')

app.post('/create-subscription', async (req, res) => {
 const { priceId, customerId } = req.body;

 // Create the subscription
 // setting payment_behavior to "default_incomplete" ensures we get a Payment Intent
 // that we can confirm on the client using the Payment Element
 const subscription = await stripe.subscriptions.create({
   customer: customerId,
   items: [{ price: priceId }],
   payment_behavior: 'default_incomplete',
   expand: ['latest_invoice.payment_intent'],
 });

 // Make sure you associate the subscription ID with the user in your database!
 myUserDB.addUserSubscription("jennyrosen", subscription.id);

 // Get the Payment Intent client secret
 const paymentIntent = subscription.latest_invoice.payment_intent;
 const clientSecret = paymentIntent.client_secret;

 return res.json({
   subscriptionId: subscription.id,
   clientSecret: clientSecret,
 });
});

app.post('/login', async (req, res) => {
 // This assumes your app has an existing user database, which we'll call `myUserDB`.
 const token = myUserDB.login(req.body.login_details)
 res.json({token: token})
});

app.listen(4242, () => console.log(`Listening on port ${4242}!`));

app.post('/webhook', express.raw({ type: 'application/json' }), (req, res) => {
 const sig = req.headers['stripe-signature'];
 let event;


 try {
   event = stripe.webhooks.constructEvent(req.body, sig, process.env.STRIPE_WEBHOOK_SECRET);
 } catch (err) {
   console.error('Webhook signature verification failed.', err.message);
   return res.sendStatus(400);
 }

 switch (event.type) {
   case 'invoice.payment_succeeded': {
     const invoice = event.data.object;
     // Mark subscription as active in your database
     // For example, invoice.subscription -> "sub_abc123"
     console.log('Payment succeeded');
     break;
   }
   case 'invoice.payment_failed': {
     const invoice = event.data.object;
     console.log('Payment failed - notify the user to update their payment methods');
     break;
   }
   case 'customer.subscription.updated': {
     const subscription = event.data.object;
     // For example, handle pause, cancellation, or other changes
     console.log(`Subscription updated: ${subscription.id}`);
     break;
   }
   default:
     console.log(`Unhandled event type ${event.type}`);
 }
  res.json({ received: true });
});