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Sending a response after a finalized transaction - Stripe

After a long discussion with ChatGPT, I managed to write code that redirects the user to the Stripe payment page and then captures an event when the transaction is successfully completed.
The problem is that my fetch request has already received a response from the /checkout endpoint and is not waiting for a response from /webhook. And I would like my API to return a properly generated response after successfully finalizing the transaction. What am I doing wrong?
First, I send a request to the /checkout endpoint, which takes care of generating the payment link and sending it back:
fetch('http://localhost:3001/checkout', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
items: [
{
id: 0,
},
],
}),
})
.then((res) => {
if (res.ok) return res.json();
return res.json().then((e) => console.error(e));
})
.then(({url}) => {
console.log(url);
window.location = url;
})
.catch((e) => {
console.log(e);
});
This code when I press the button redirects me to the Stripe payment page.
Endpoint /checkout:
app.post('/checkout', async (req, res) => {
try {
const session = await stripe.checkout.sessions.create({
payment_method_types: ['card'],
line_items: req.body.items.map(({id}) => {
const storeItem = storeItems.get(id);
return {
price_data: {
currency: 'pln',
product_data: {
name: storeItem.name,
},
unit_amount: storeItem.priceInCents,
},
quantity: 1,
};
}),
mode: 'payment',
success_url: `${process.env.CLIENT_URL}/success.html`,
cancel_url: `${process.env.CLIENT_URL}/cancel.html`,
});
console.log(session.url);
res.json({url: session.url});
} catch (e) {
// If there is an error send it to the client
console.log(e.message);
res.status(500).json({error: e.message});
}
});
I connected StripeCLI to my server using stripe listen --forward-to localhost:3001/webhook. Now I can capture the successful transaction event using the /webhook endpoint, but I have no way to return The transaction was successful to the client:
app.post('/webhook', (req, res) => {
const event = req.body;
if (event.type === 'checkout.session.completed') {
res.send('The transaction was successful');
}
});

After the suceesful payment the customer should be redirected back to your website. Where you can create success page.
success_url: `${process.env.CLIENT_URL}/success.html`,
If you want to get some data back from the Strapi after the paymant is successful page you can add this
success_url: `${process.env.CLIENT_URL}/success.html?&session_id={CHECKOUT_SESSION_ID}`
At the succes page you just deconstruct the data. And do whatever you want with them :)
If you deconstruct the object for example like this: (Next.js)
const stripe = require("stripe")(`${process.env.STRIPE_SECRET_KEY}`);
export async function getServerSideProps(params) {
const order = await stripe.checkout.sessions.retrieve(
params.query.session_id,
{
expand: ["line_items"],
},
);
const shippingRate = await stripe.shippingRates.retrieve(
"shr_1MJv",
);
return { props: { order, shippingRate } };
}
export default function Success({ order, shippingRate }) {
const route = useRouter();
Yo can log out the whole object to see whats inside
console.log(order);
If the payment was sucessfull you should get in prop variable: payment_status: "paid"

Stripe will automatically redirect the client to the success_url that you specified when you created a Stripe session.
You can use the webhook for saving the order in the database for example, but not to redirect the client.

On payment success remove all cart items

I have integrated stripe api into my ecommerce website. When you checkout you are sent to the stripe api payment link where you type in your information. Of course two things could happen here, either the payment goes through and succeed or the order gets canceled. Everything works except I am trying to remove all cart items only if the payment succeeds and goes through.
Here is my code:
app.post('/api/createCheckoutSession', async (req, res) => {
try {
const session = await stripe.checkout.sessions.create({
payment_method_types: ['card'],
mode: 'payment',
line_items: req.body.items.map(item => {
const storeItem = storeItems.get(item.id)
return {
price_data: {
currency: 'usd',
product_data: {
name: storeItem.name
},
unit_amount: storeItem.priceInCents
},
quantity: item.quantity
}
}),
success_url: `${process.env.SERVER_URL}`,
cancel_url: `${process.env.SERVER_URL}cart`,
})
res.json({ url: session.url })
} catch (e) {
console.log(e)
res.status(500).json({ error: e.message })
}
});
So if I do the following code I can remove all cartItems from the user, however this happens regardless of if the payment was successful or not:
app.post('/api/createCheckoutSession', async (req, res) => {
try {
const session = await stripe.checkout.sessions.create({
payment_method_types: ['card'],
mode: 'payment',
line_items: req.body.items.map(item => {
const storeItem = storeItems.get(item.id)
return {
price_data: {
currency: 'usd',
product_data: {
name: storeItem.name
},
unit_amount: storeItem.priceInCents
},
quantity: item.quantity
}
}),
success_url: `${process.env.SERVER_URL}`,
cancel_url: `${process.env.SERVER_URL}cart`,
})
cartItem.remove({ user: req.body.user }, function (err) {
if (err) {
console.log(err)
}
})
res.json({ url: session.url })
} catch (e) {
console.log(e)
res.status(500).json({ error: e.message })
}
});
So looking through Stripe api documentation and googling the only thing that consistently comes up is success_url, which wasn't what I am looking for (at least I do not think it will fix what I am trying to do). So for the original code I tried to console.log(session) and found a payment_status: 'unpaid' and figured I could use this to do what I am trying to by the following:
app.post('/api/createCheckoutSession', async (req, res) => {
try {
const session = await stripe.checkout.sessions.create({
payment_method_types: ['card'],
mode: 'payment',
line_items: req.body.items.map(item => {
const storeItem = storeItems.get(item.id)
return {
price_data: {
currency: 'usd',
product_data: {
name: storeItem.name
},
unit_amount: storeItem.priceInCents
},
quantity: item.quantity
}
}),
success_url: `${process.env.SERVER_URL}`,
cancel_url: `${process.env.SERVER_URL}cart`,
})
console.log(session)
if (session.payment_status == 'paid') {
cartItem.remove({ user: req.body.user }, function (err) {
if (err) {
console.log(err)
}
})
}
res.json({ url: session.url })
} catch (e) {
console.log(e)
res.status(500).json({ error: e.message })
}
});
With the above code, the if statement does not work as the only time something gets logged to the console is when the session first gets created, so the if statement does not execute after the payment succeeds or gets canceled.
Another solution is for me to create a different success_url where it pops up and I have a react useEffect call the remove cart items function. And then it redirects again somewhere else, but as I alluded to earlier this just seems like a terrible solution when it feels like I am just missing something very simple to get this to work the way I have attempted to.

I'm going to restate what I think your goal is here so I am clear on what the answer is.
After user is sent to checkout you have 2 potential outcomes you want your app to handle:
Successful payment: Get money, get user their goods
Payment canceled: Empty user cart
The problem you are running into is that your code can only await the creation of the user session. At that point you should just redirect to the Checkout URL. At this point your code does not know whether the payment will go through or not because the user is just being redirected to the Checkout UI where they can make their payment.
The state of the user's payment is reported back to your app in 2 different ways.
Customized Success/Cancel URLS - While this doc focuses on capturing the Session ID in the Success URL, you can do the same thing with the Cancel URL. In this case which URL the user is sent to tells your system a Checkout was either successful or was canceled. The Session ID injected into the URL identifies which Checkout session it was.
Checkout Webhook events - This approach provides confirmation of success but requires waiting until the session is expired to confirm cancelation. Still, it is recommended that most integrations make use of Webhooks to monitor account activities.
So to circle back to your code, I would move the code that clears the cart to a function that responds to either the user being redirected to the cancel_url in your app or responds to the checkout.session.expired webhook event

How to send metadata in stripe during checkout process?

const combineData = function (prod, pot, data) {
const newData = [...prod, ...pot];
const finalCheckout = [];
for (let i = 0; i < newData.length; i++) {
finalCheckout.push({
name: newData[i].plantName || newData[i].potName,
images: [newData[i].images[0]],
amount: newData[i].price * 100,
currency: "inr",
quantity: data[i].quantity,
metadata: { id: String(newData[i]._id) },// **Mongoose ID**
});
}
return finalCheckout;
};
exports.getCheckOutSession = catchAsync(async (req, res, next) => {
const [product, pot] = filterVal(req.body.product);
const userId = req.user._id;
const products = await ProductModel.find({ _id: { $in: product } });
const pots = await PotModel.find({ _id: { $in: pot } });
const newData = combineData(products, pots, req.body.product);
// 2. create the checkout session
const session = await stripe.checkout.sessions.create({
payment_method_types: ["card"],
success_url: `${req.protocol}://${req.get("host")}/?alert=booking`,
cancel_url: `${req.protocol}://${req.get("host")}/products/`,
customer_email: req.user.email,
client_reference_id: userId,
line_items: newData,
});
res.status(200).json({
status: "success",
url: session.url,
});
});
I'm build an Ecommerce website, when user makes a payment I want to send the product id's stored in my mongodb database as metadata in stripe. But i'm getting an error how to solve this.
Error:parameter_unknown - line_items[0][metadata]
Received unknown parameter: line_items[0][metadata]
Stripe is rejecting the mongodb id's has metadata
"metadata": {
"id": "61e40a5a7d83539092e7a92f"
}
NOTE: I'm sending all the successfull data like price, name,images amount,quanity in the above combineData function.
I have tested the above code without metadata key. It works fine my payment is registered and webhook event is registered in stripe.
When i use metadata keyword the above error occurs in stripe.

You need to create product + price first.
After informing stripe of the line items, the session token will be returned to client side, and users will then be redirected to stripe's payment page.
Stripe will be able to know what items (e.g image, product name, product description) to display to the user, through the line items you submitted while creating the session.
If you just pass a MongoDB _id, stripe will not know what items to display since they have no info of the product.
const session = await stripe.checkout.sessions.create({
customer: customerId,
billing_address_collection: 'auto',
payment_method_types: ['card'],
line_items: [
{
price: STRIPE_PRODUCT_PRICE, //price of created product
// For metered billing, do not pass quantity
quantity: 1,
},
],
// success_url: `${YOUR_DOMAIN}?success=true&session_id={CHECKOUT_SESSION_ID}`,
// cancel_url: `${YOUR_DOMAIN}?canceled=true`,
});
Example of how strip product and price id looks like. A single product can have many different prices.
STRIPE_PRODUCT=prod_I7a38cue83jd
STRIPE_PRICE=price_1HXL0wBXeaFPR83jhdue883
These references will be useful to you.
Creating a product: https://stripe.com/docs/api/products/create
Creating a price: https://stripe.com/docs/api/prices/create
I will normally store the product id and price id as stripe_product_id and stripe_product_price in the local MongoDB database so you can use during checkout.
So after you receive the order, you can create a local order first, with the products and quantity, then...
const line_items = ordered_products.map(product => ({ price: product.stripe_product_price, quantity: product.quantity }))
const session = await stripe.checkout.sessions.create({
....
line_items,
...
})
Advanced method - creating product and price on the go.
This is more tedious because you need to do more checks.
You can refer to creating line_items in the link below from stripe docs.
https://stripe.com/docs/api/checkout/sessions/object

use payment method for stripe paymentintent

I have this:
const stripe = require('stripe')('sk_test', {
stripeAccount: 'acct_...'
});
const paymentIntent = await stripe.paymentIntents.create({
amount: 1900,
currency: 'cad',
customer: 'cus_...',
// confirm: true,
}, {
stripeAccount: 'acct_...',
});
console.log(paymentIntent)
so then I go to run this paymentIntent, and it works, but doesn't actaully charge the customer because it says that it has no payment method on file. So then I take this customers id, and look at my stripe dashboard, and it shows the payment method there, and the method matches with the id. so now I believe I am doing something wrong creating the paymentIntent, but the payment is going through, just not confirmed because it says no payment method attached! So why is this not working?
error: UnhandledPromiseRejectionWarning: Error: You cannot confirm this PaymentIntent because it's missing a payment method. You can either update the PaymentIntent with a payment method and then confirm it again, or confirm it again directly with a payment method.

PaymentIntent requires a Payment Method Object such as;
payment_method_types: [card],
PaymentIntent object
const {
error: backendError,
clientSecret,
paymentIntentId,
transfer_group,
} = await fetch('/create-payment-intent', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
paymentMethodType: 'card',
currency: 'cad',
customerEmail: billingDetails.email,
description: 'Basket_Order_Id',
}),
}).then((r) => r.json());
and when you created the paymentintent on your backend you should return
app.post('/create-payment-intent', async (req, res) => {
const {paymentMethodType, currency, customerEmail, description,
suppliers} =
req.body;
console.log('paymentIntent Create requ body', req.body);
req.session.suppliers = suppliers;
suppliersArray = suppliers;
const idEmpotency = nanoid();
// Each payment method type has support for different currencies. In order
to
// support many payment method types and several currencies, this server
// endpoint accepts both the payment method type and the currency as
// parameters
//
// Some example payment method types include `card`, `ideal`, and
`alipay`.
const params = {
payment_method_types: [paymentMethodType], 'CARD'
amount: 20000,
currency: currency,
description: description,
receipt_email: customerEmail,
statement_descriptor_suffix: 'Your Bank Descriptor on Customer Account',
transfer_group: idEmpotency,
// confirm: true,
// capture_method: 'manual',
};
try {
const paymentIntent = await stripe.paymentIntents.create(params);
// Send publishable key and PaymentIntent details to client
console.log('paymentIntent', paymentIntent);
res.send({
clientSecret: paymentIntent.client_secret, - SENDING YOUR CLIENTSECRET
paymentIntentId: paymentIntent.id,
transfer_group: paymentIntent.transfer_group,
});
} catch (e) {
return res.status(400).send({
error: {
message: e.message,
},
});
}
});
client_secret and use it on your front-end
const {error: stripeError, paymentIntent} = await stripe.confirmCardPayment(
clientSecret, USE YOUR CLIENT SECRET THAT RETURNED FROM YOUR BACKEND FROM PAYMENT INTENT OBJECT
{
payment_method: {
card: elements.getElement(CardElement),
billing_details: {
name: 'Michael',
},
},
}
);
Before confirming the client_secret that returned from payment_intent you can not succesfully confirm the payment.
You can use stripe elements to start with their own card payment component.
I recommend you to check here https://stripe.com/docs/payments/quickstart, you will get more idea...

Create session Payment confirmation on Stripe Nodejs

I've created a POST request to collect payments from customers via Stripe
let data = {
errorMsg:'',
key: process.env.STRIPE_PUBLIC_KEY
}
const session = await stripe.checkout.sessions.create({
payment_method_types: ['card'],
line_items: [
{
price_data: {
currency: 'usd',
product_data: {
name: 'My tools',
},
unit_amount: 10,
},
quantity: 1,
},
],
mode: 'payment',
success_url: 'https://example.com/success',
cancel_url: 'https://example.com/cancel',
});
const sessiondetails = await stripe.checkout.sessions.retrieve(session.id);
console.log("session details", sessiondetails);
res.redirect(303, session.url);
}))
Can someone tell me how can I confirm that the payment is successfully processed before adding credits/allow customers to download digital products or before redirecting the user?

The recommended way to track this is using the checkout.session.completed webhook to handle fulfillment. Either here or retrieving the session as you've done, you can check if the payment_status (API ref) is paid before granting access/credits.