--- title: Next.js, GraphCMS, Stripe Checkout part 3 slug: next-js-graphcms-stripe-checkout-part-3 published_at: 2020-11-24 16:03:02 +0000 updated_at: 2023-01-30 22:54:05 +0000 summary: description: In this four part series, CJ Avilla and Jonathan Steele cover how to build a headless e-commerce application on Next.js backed by GraphCMS using Stripe Checkout for payments. This is part 3 of 4 where we cover how to integrate Stripe Checkout. ### Presenters Jonathan Steele, Developer Advocate at GraphCMS - https://twitter.com/ynnoj CJ Avilla, Developer Advocate at Stripe - https://twitter.com/cjav_dev ### Resources Next.js documentation: https://nextjs.org/docs/getting-started GraphCMS documentation: https://graphcms.com/docs Stripe Checkout documentation: https://stripe.com/docs/checkout Repository with the code for the demo: https://github.com/cjavilla-stripe/next-graphcms-stripe-checkout #Stripe #Payments tags: [stripe, payments, graphcms, graphql, next.js, stripe checkout, checkout, @ynnoj, @cjav_dev] views: 1299 author: CJ Avilla url: https://www.cjav.dev/videos/next-js-graphcms-stripe-checkout-part-3 youtube_url: https://www.youtube.com/watch?v=R2xT3ue-liY youtube_id: R2xT3ue-liY embed_url: https://www.youtube.com/embed/R2xT3ue-liY thumbnail_url: https://i.ytimg.com/vi/R2xT3ue-liY/hqdefault.jpg type: video --- # Next.js, GraphCMS, Stripe Checkout part 3 *Published: November 24, 2020* *Views: 1299* ## Watch [Watch on YouTube](https://www.youtube.com/watch?v=R2xT3ue-liY) [![Next.js, GraphCMS, Stripe Checkout part 3](https://i.ytimg.com/vi/R2xT3ue-liY/hqdefault.jpg)](https://www.youtube.com/watch?v=R2xT3ue-liY) ## Description In this four part series, CJ Avilla and Jonathan Steele cover how to build a headless e-commerce application on Next.js backed by GraphCMS using Stripe Checkout for payments. This is part 3 of 4 where we cover how to integrate Stripe Checkout. ### Presenters Jonathan Steele, Developer Advocate at GraphCMS - https://twitter.com/ynnoj CJ Avilla, Developer Advocate at Stripe - https://twitter.com/cjav_dev ### Resources Next.js documentation: https://nextjs.org/docs/getting-started GraphCMS documentation: https://graphcms.com/docs Stripe Checkout documentation: https://stripe.com/docs/checkout Repository with the code for the demo: https://github.com/cjavilla-stripe/next-graphcms-stripe-checkout #Stripe #Payments ## Transcript [Music] all right this is part three in this part of the series you'll learn how to add a button to your page to redirect the stripe hosted checkout and pay for your product uh so or allow customers to pay for your product all right so i'll just uh we'll jump right into it so i think the next thing we want to do is maybe add a button to this page where like when you click the button you're redirected to checkout which i think we could do with i think maybe to keep it easy we can just like create the component right here like a pay button or something and that's going to take in like the id of the product and then return just like a button object that when it's clicked we like handle the click um or yeah i'll say bye and then here we can say like that we want to uh prevent the default of create checkout session and then redirect to check out so here oh gosh uh so like maybe api create checkout session and we can add like a backend thing right so we need to yeah so we need to write an api route next api route which is essentially a service function to create that stripe checkout session so that's that's that's not available with the client stripe.js right got to do that with node correct yeah so we'll have to actually make the checkout session on the server with stripe node and then here i think we just want to pass in like the id of the uh the id of the product so this would be like the idea of the product in graph cms so that we can like look up what the price is what do you think would you why would you do it that way instead of just passing the price um because if we pass just the price here then this is happening on the on the client side so then someone could say like oh i actually only want to pay one dollar for this like change the price um whereas like if we do it this way i think we can look up on the server we can like look up the the product and then figure out what its price is and then create the checkout session um so then here we'll do like session is await this thing so it's interesting so i've been using stripe checkout with nextgs xjs api routes and um so they actually recommend that you don't use fetch with api routes oh they do okay so they just right yeah but this sorry i actually got caught up in this and i don't know if it was a me thing or them thing or what but essentially so they say yeah don't use fetch with api routes just import the function and just call the function so i did that but the problem i had was because my function my api route was essentially in a node environment with stripe node yeah um and because i was important into what is a client-side javascript environment it was freaking out so it didn't like so i had to use fetch for it to work yeah so because you well with stripe node we have to use our secret api key our secret stripe api key so like no matter what that javascript must run on the server so like there might be cases where you can have api stuff that's happening on the client but i think yeah i think in order for that to work yeah yeah the error was kind of vague it wasn't it's definitely like a compile shoe with the with the function um so i wasn't sure what was going on but um didn't work unfortunately gotcha um okay and then i did create a new stripe account for us maybe that's gonna where did that go um okay so we've got some api keys here generally i would probably put these in you know environment variables and secrets and such but for the purpose of the demo we can just drop them in and then i'll roll them afterwards um okay so we've initialized whoops yeah okay so this initializes an instance of stripe with stripe uh actually this should be stripe node so we want this to come from stripe uh we initialize an instance of stripe and then here in our create checkout session api endpoint we want to um probably try is uh stripe.checkout.com create and then we'll pass in all of our stuff success url cancel you already putting all these params off my heart now right some of them yeah i know the like required ones by heart but there are so many and they there's new ones all the time so yeah i'm not your striped child with the um the price data on the fly that we're going to do okay cool so i'm kind of keen to see this nice uh i just i can't remember i think that might do it okay we also need um payment payment method types which is going to be a list and i think maybe we should use euros and then we can say like card ideal shiro pay cool and uh separate debit maybe or something you can just kind of like add more payment method types there and then it'll just work um and then line items this is where things get um really interesting and you can really configure down to like how much or like what what your payment is looking like so success url this is where we're gonna come back to for now let's just say we're going to come back to like the root and then we'll have the checkout session id in the query string param like when we redirect checkout we'll replace this with the actual id of the checkout session and then okay yeah so like this yeah you just actually type that in literally and then uh when we're making this call this is creating a new instance of the checkout session but when we redirect and then redirect back this will have like cs underscore or whatever it will be populated um and then the cancel url i think we might want to come back to product slash and then like the slug um so i can't remember i guess we'll probably like yeah see the wrecked up body yeah you're gonna have to look up the product because you only sent was the id oh right yeah okay perfect okay um yeah so i guess like before we do anything we have to like fetch the product from graph cms right um so the beauty of uh graphql requests that we've used is that it's works in both node and javascript uh client-side javascript but we've only really been using it in node anyway because get static paths and get static props are both in node environment um because they've run a build timer right um so but you can use it you can also use it um you know client side if you wanted to yeah okay so yeah i'm kind of thinking instead of the id we probably want to pass the slug but is that unique enough i don't know let's uh well we've we've been we've enforced uniqueness uh in the schema so that nobody will be able to create um [Music] okay yeah another product with the same with the conflict and slug uh just one time all right so then yeah i'm thinking that back from over here rather than passing the id we passed the slug what do you think about that sounds good okay cool yeah so we're we're pulling the slug off the body so we're going to send a post request that has a slug in the body then we pull that off and then we are using our graph cms connection here with to make a graphql query where we're fetching um our product and getting better at the price right yeah we're yeah exactly where we're getting the price this is the the key and then so we should have a product object and then we want to use that product object down here when we're constructing our line item so technically you could pass a price if you had the stripe price id but um we don't store that right now in graph cms so instead we can pass this price underscore data hash which has a unit amount and that can be our product.price right doesn't want to pass a currency we'll pass euro so when you use uh this price data when i pass this will this is this creating a price inside of stripe or is it just kind of using that data to process the payment it does it creates it creates and archives like a one-time price object so it does archive so it can't be used that that unique id can't be used again exactly exactly so you can like when you're after you see the purchase you can like browse around in the dashboard and find the price object but it's not actually used um and yeah so it needs like at a minimum it needs the unit amount currency and then it also needs a product um so in stripe you can you can create these product objects that are sort of similar what we've created in graph cms and then we could pass here product and then like the id of the product so theoretically we could just create like a product called swag or something in stripe and then pass that but similarly there's a product beta thing that'll allow us to create it like on the fly where we can pass like the name as product.name and that'll do the same thing it'll just create another ad hoc product sort of on the fly for us that's archive2 uh yes i believe so yeah um yeah if we fail maybe we respond with like her okay so chances are this is not gonna work the first time so let's let's give it a whirl and just see i think um uh curl.x post to localhost 3000 api create checkout session yay okay let's see what we got uh graphql client is not defined right because they didn't copy that thing yeah i think i think we need to uh just kind of import a graph cms client because we've got about five different graphql clients across yeah yeah definitely yeah should we do that right now um or we should we leave that as like a let's just yeah let's let's just uh get a bit of work okay cool um all right so params is not defined yeah so it's uh line 24 and the graphql variable so nice i think we're getting warmer okay uh cms era oh right yeah i guess we have to like actually pass a slug oh that's that looks promising uh hey all right so this is a checkout session great we got the checkout session id back i think the server route is working let's add our button to the front end so we've got this pay button component if we just drop it in like i don't know before the image and it's going to need the slug right which is going to be product.slug and if we come over here button do we get a button we do not get a button oh there it is down there in the corner uh all right so if we um big product image yeah huge [Applause] very image full um all right we click on buy nothing is happening yet all right so the pay button we're passing in this line we need yeah well we need to actually oh yes we need to actually do stuff with it right uh let's see so now we'll use strike.js right yeah so we're going to say stripe.redirect to checkout and we pass in um just one thing and that is the session id uh like so and that should be a full page redirect to the stripe hosted checkout now in order to get that we have to import load stripe from stripe stripe.js and then this gives us the ability to call stripe promise is load stripe we call the load stripe function and pass in our publishable key and then this gives us back a promise but we want to like create the stripe promise outside of the function and then we can just like um await the resolution of that promise inside of the click so that we're not like loading stuff unnecessarily yeah yeah otherwise you have stripe gs loading on the page and they might have even clicked by exactly exactly so then if we go back over here and refresh the page and then click buy uh very little feedback all right so let's see um go back to all we got to find our create checkout session all right we got back a checkout session object something in the console ah yes there is nice so just for return session right from the function yeah oh do you have to like return this no sorry uh the uh korea checkout session we definitely wrote a session right yeah so we're rendering that back here um uh is the is the data object not is it not nested inside of because i know some of the stripe responses are like nested a bit yeah let's log out session here and just see if it comes out at the top level as expected maybe so we get name is snapbackcap those are okay so we click buy we get this session oh wait sessionresponse okay yeah this is not um right okay so this needs to be like dot then um uh rest.json yeah yeah i know okay fetch api mod still i know still captures me out yeah despite four or five years of using it yeah there we go all right look at that we're on stripe checkout this is so cool all right so we've got yeah all of our payment methods here we can pay with card or ideal or shiro pay or whatever and then box yeah we've even got like a sca yeah support out of the box um so we can see this you know the little modal pop open we can 3d secure authenticate our payment and then we should be redirected back to success and this is where like our checkout session id was repopulated in the header that's cool um awesome nice yeah we've paid for something and uh yeah like i mean maybe to show how cool it is we could go back into graph cms and change the um can we change the price of it real quick sure i mean our or yeah actually let's yeah so let's change the snapback and say that this these hats have gotten super popular and we need some real revenue so we're going to go from 20 euro to 200 euro because that makes a lot of sense and then if you still want one yeah absolutely totally worth it um okay so now if we click on snapback uh oh you know what maybe we should put the price on this page uh let's yeah let's just show people what they're gonna pay before they get too far so yes you could use um intl yeah did you like currency formatting yeah currency full line api yeah it's pretty nice totally um but yeah it looks like it fetched that so that change like in production that change would require rebuilding our static assets right because this is like when we're when we're using static props these are being generated at build time so if we made that change in graph cms in order for it to reflect we would have to like rebuild whatever's in the server it's happening automatically because we're in development right not necessarily no okay cool so so yeah so yeah that is one option you could essentially set up web hooks with um graph cms uh which whichever cdn use using whether that's kind of um versaille or metaphy or something else like that alternatively um there is a a prop we can use uh with guts gets out of props called revalidate okay okay um and essentially what that does is um [Music] you can set a value which is in seconds and each time that page is loaded it will kind of regenerate that page uh on the fly to kind of pull the latest data down so in your example let's see you bump the price up and that next page load say three seconds after the previous page load would then kind of regenerate on the fly to ensure that it's up to date so that saves that prevents the need to have these cumbersome build times because you can just kind of make a small change say you're fixing the table or updating a blog post or something like that or obtain the price or a product image adding a new product image you can just stipulate in next yes the you revalidate revalidate prop um and essentially i'll re re kind of build that page uh in the cloud you know in the background every source so many seconds when a request comes in so that's pretty powerful okay now that you can redirect to checkout and take payment uh in the next episode we're going to talk about how you can actually fulfill that order using a graphql mutation with graph cms so stay tuned --- [Back to all videos](https://www.cjav.dev/videos) --- ## Hey Agent, thanks for visiting! 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