--- title: Stripe Webhooks slug: stripe-webhooks published_at: 2019-10-16 19:11:57 +0000 updated_at: 2023-01-30 22:50:55 +0000 summary: description: Join us for our Developer Office Hours and get your questions about leveraging the awesome power of webhooks answered. CJ and Adrienne will walk you through how to setup an endpoint to accept webhook events reliably in Ruby. We'll cover some common tripping points, best practices, and using the CLI to test your endpoints. ### Table of Contents 02:20 What is a Webhook? 06:20 Demo of what we'll build 07:00 Scaffold new Rails App 09:00 Add simple Checkout UI 13:10 Setup Webhook Route 15:25 Skip CSRF Check 16:00 Implement Webhook Controller Action 20:00 Save and process events later 26:07 Verify webhook signatures 34:07 Refactor webhook handling into service objects 39:14 Process events in background job 46:03 Using ngrok 53:22 Q&A ### Resources Official guides: https://stripe.com/docs/webhooks/build Stripe CLI: https://github.com/stripe/stripe-cli Code: https://github.com/stripe-samples/developer-office-hours ### Support If you have a question, please feel free to reach out to our support team on Discord at https://stripe.com/go/developer-chat. ### Updates Sign up to stay updated with developer news: https://go.stripe.global/dev-digest ### Feedback If you have any feedback about this or other episodes, let us know: https://forms.gle/VjNqzRhotM2snYo88. #Stripe #Payments tags: [sca, stripe, credit-cards, api, @cjav_dev, @adrind] views: 28213 author: CJ Avilla url: https://www.cjav.dev/videos/stripe-webhooks youtube_url: https://www.youtube.com/watch?v=oYSLhriIZaA youtube_id: oYSLhriIZaA embed_url: https://www.youtube.com/embed/oYSLhriIZaA thumbnail_url: https://i.ytimg.com/vi/oYSLhriIZaA/hqdefault.jpg type: video --- # Stripe Webhooks *Published: October 16, 2019* *Views: 28213* ## Watch [Watch on YouTube](https://www.youtube.com/watch?v=oYSLhriIZaA) [![Stripe Webhooks](https://i.ytimg.com/vi/oYSLhriIZaA/hqdefault.jpg)](https://www.youtube.com/watch?v=oYSLhriIZaA) ## Description Join us for our Developer Office Hours and get your questions about leveraging the awesome power of webhooks answered. CJ and Adrienne will walk you through how to setup an endpoint to accept webhook events reliably in Ruby. We'll cover some common tripping points, best practices, and using the CLI to test your endpoints. ### Table of Contents 02:20 What is a Webhook? 06:20 Demo of what we'll build 07:00 Scaffold new Rails App 09:00 Add simple Checkout UI 13:10 Setup Webhook Route 15:25 Skip CSRF Check 16:00 Implement Webhook Controller Action 20:00 Save and process events later 26:07 Verify webhook signatures 34:07 Refactor webhook handling into service objects 39:14 Process events in background job 46:03 Using ngrok 53:22 Q&A ### Resources Official guides: https://stripe.com/docs/webhooks/build Stripe CLI: https://github.com/stripe/stripe-cli Code: https://github.com/stripe-samples/developer-office-hours ### Support If you have a question, please feel free to reach out to our support team on Discord at https://stripe.com/go/developer-chat. ### Updates Sign up to stay updated with developer news: https://go.stripe.global/dev-digest ### Feedback If you have any feedback about this or other episodes, let us know: https://forms.gle/VjNqzRhotM2snYo88. #Stripe #Payments ## Transcript one of the most fundamental pieces of a modern API integration is the web hook over the years we've seen many web hook implementations and we're excited to share some of our best practices and high-level pointers for using web hooks successfully welcome back to another episode stripe developer office hours I'm CJ a developer support engineer and I'm joined today by Adrian from the developer relations team here at stripe just as a reminder we have a ton of knowledgeable stripes standing by to answer your questions live in chat today so go ahead and ask away today Adrian's going to show us what web hooks are and why we need them she'll dive into some examples common pitfalls and generally how web hooks work then we'll demonstrate some best practices with real code using Ruby on Rails we'll show how to build and test web hooks locally with the stripe CLI and also end rock and we'll show how to protect your web hook endpoint recover if your server was down for a bit and then we'll hopefully wrap with a lightning round of trivia for frequently asked questions and answers to handling you know stripe flavored web hooks so with that I'm going to invite Adrian hey Adrian can you tell us what what web hooks are and why why we need them I would be happy to CJ um so typically when people talk about integrating with an api service like stripe they're talking about setting up an integration where your application makes a request to the API service and receives a response however many API services also offer an alternative web hook flow where it's basically the inverse the API service can send the request to your application this has seen pretty commonly today through with the top API services like Twilio where you want to receive messages about any inbound messages that you might be receiving or github let's say you have a popular repository and some opens an issue and the repository you might want to set up a web hook to receive notice the web pop flow is really powerful because all it essentially is receiving real-time notifications about events that are happening outside of your application next slide so some quick terminology that CJ will use when demoing when we talk about a web hook endpoint that is the publicly accessible endpoint on your server that can receive requests from stripe we have a lot of examples of example web hook end points in our Doc's we included a little screenshot of the one there and CJ will be going through a live setup of creating a web hook endpoint and then we also have the web hook event that is the data that is sent in the request to your web hook end point and at stripe we actually have an event model so it's a standardized format to receive your events that has meta information about the event like when it was created what type of event and then it also has the object that was affected by the event so let's say you want to receive a web hook when you have an available balance in your stripe account we will actually include the balance object that you can then inspect in your web hook endpoint and action on next so web hooks are becoming increasingly part of like an essential part of your payments flow and we while we love them at stripe we also know how hard it is to set them up and debug them and test them especially locally because it sits in a flow that is outside of your existing application so this year we launched the stripe CLI with an initial feature set that is focused on helping you locally test and develop these web hook endpoints we included a link to the CLI the github repo in the YouTube description below so feel free to download and it's also still in beta at the time of this filming so please open any issues or any suggestions about what you would love to see in the product roadmap for the CLI because it's a tool that we're really interested in working on more so now I'm going to throw it at cj for the fun stuff which is the actual demo part of how to actually get a web hook set up and running awesome thanks Adrian super helpful to have just a high-level breakdown of what web hooks are so in today's episode what we're gonna do is start with just a very simple web hook endpoint and evolve that to make improvements based on some set of constraints so we'll start with a URL that can receive post requests and process those notifications then we'll solve for the case that we may receive the same event notification more than once by making the endpoint idempotent so we're gonna store the event data and only process again if we haven't seen that event before it's possible that occasionally you will receive your stripe events more than once so we want to show how to how to handle that we'll also show how to check the web hook signatures to verify that the request came from stripe and not some attacker and finally we'll show a best practice for processing that those web hook events later in a background job so this is kind of what it's going to look like we'll have a very simple checkout integration where you can fill out the information to buy some some cool pins and we'll show that the web hook end point that we will implement will receive and respond immediately to the request from stripe and then in the background we'll kind of simulate that we are emailing the customer pulling from an inventory management system maybe printing a shipping label dinging in slack you know some sort of long-running processes that are happening in the background so with that let's go ahead and get started so again in true office our fashion we're going to start from scratch here we're going to use Ruby on Rails today Postgres database and we're just going to use the the active job back-end for for our background processing jump into the web hooks demo here I'm going to edit the gem file just a little bit to add the striped gem this is the stripe Ruby SDK I'm also going to remove spring and add pry rails case we want to use that okay bundle install to install those dependencies while that's running here let's copy I'm gonna copy my credentials and the master key into my config when if you go to the the github repository for developer office hours you'll see there's a branch that you can check out if you want to follow along you can check out the the webhooks demo branch and then download the stripe CLI and maybe try to follow along here in the readme for the webhooks demo we explained how to set up your own credentials so you can set your own API keys for your publishable secret and webhook secret keys here so now that we've copied those in there one last thing I'm going to do is I'm gonna add an initializer called stripe dot RB and this is just going to set the API key one time so this is pulling the API key out of the environment variables and setting that on the the stripe SDK at the top level setting the API key if you're in if you're using another web framework may be like laravel or some other web framework may be like Django you would set it in settings that pie and laravel you're gonna do this in the app config as part of the when the when the when the app is loading so in laravel it's in the app service provider register method so you only need to set this key one time for these bigger web frameworks so now that we have that setup I'm gonna start with just like a very basic page that has a check out button so in rails you can just throw up a really simple index.html page here with a check out button a lot of this is boilerplate I'm just kind of showing you a UI that we can use that will trigger a bunch of web hook events that we can use to look at and so for our UI it's going to look will have a button that just says buy pins and that will basically be it we're gonna use the clients the client-side integration for checkout we've already have a SKU configured with the that we want to buy so now we can start the real server we might need to actually make a bee drop create like delete the old database that I was using for testing the demo and then we'll create a new one and and migrate that and then start the server so now we have a local web server running on localhost 3000 so if we go pull up localhost 3000 here from the browse directly to localhost 3000 we'll see this big by pins button and if we click on that we can walk through the hosted checkout process that stripe has filling in some card details here again this is just to simulate what we might want to automate okay so we went through the whole checkout process and maybe our pin business is starting out real scrappy we're just going to put up this page we threw it up it took 5 minutes and the way that we're going to fulfill orders initially is we're just going to log into our stripe dashboard here go to the events page and then search through all the events and look for a checkout session completed event and then we'll manually like copy and paste the email and send emails to customers and pull from inventory so this whole store and the whole business might be really manual in the beginning and what we'd like to do is really just automate a ton of that because we are developers and that's what we like to do is automate things so well for the demo we'll be handling this type of webhook event this is a webhook event type i will show you a huge list of event types that we could listen for the checkout dot session dot completed event is a really common one for handling checkout events there is also this huge list and the api ref if you if you go and dig in here you'll see all different kinds of events that you may want to action on for different types of stripe events so maybe a countdown updated would be helpful if you are a platform or marketplace taking action when an account is updated especially with the the new onboarding requirements refresh where you'll have different requirements you might listen for a charge dot refunded and take some action based on the charge being refunded other common ones that you might see is invoice not created this is really handy with billing so not the first invoice but all subsequent invoices will trigger an invoice created event that when fired will be you'll have an invoice that's in the draft status that you can then update and adjust with invoice items so this invoice created event fires and you have one hour to go and make any adjustments so that's handy payment action required is also handy for billing and then one other that I wanted to call out here is the issuing authorization request really cool stripe product is issuing and this allows you to issue cards to card holders and when they go and attempt to swipe the card at different merchants you'll get information about that authorization and be able to make decisions about whether or not you would like to approve or decline that that transaction so really really neat just wanted to kind of highlight all the different event types that you might run into and so you this is where you would go and check those out all right so back to our back to our editor here we have one single view the next thing that I want to do is actually create the route and the action that we're going to take when we receive webhook requests so I'm going to generate a controller here gonna be a web hook events controllers this is a rails controller we don't need a helper or assets because it's gonna be API only alright so we'll set up a route there's gonna be a post route to slash webhook events slash source to web hook events create so what this means is we're gonna have a URL where there is a dynamic component to the path that is going to be this source variable that changes and when we receive a post request to this you we'll call the the create method on the web hook events controller and so this might look something like this you'll have some URL that's like localhost 3000 slash web hook event slash right and then you might also have github and Twilio or whatever other service you are receiving web hook events for so you know in a modern web application it's really common to have web hooks received from a bunch of different sources and different services and so here we're gonna show how to build this web hook event controller that is receiving web hooks for different kinds of sources so this source starting with a colon means that it's dynamic and we'll be able to sort of branch based on that source attribute if we look at our web hook events controller the first thing we need to do is define this create method and initially all its gonna do is just spit back the params that we already received or that we just received now in rails this params object is sort of hash like it has the query string parameter params and often like other things like the controller name and the action name but essentially you can think of that as like the data that we're receiving as part of the post request one other thing that we'll need to do is ignore CSRF okay so if you have cross-site request forgery protection in your web framework of choice then because we're gonna be receiving this post request from a third party and it's not a post request that's coming from a form that we've built we don't have an opportunity to really just like set an authenticity token for each request so we're gonna skip CSRF and we're gonna check the authenticity of the request a different way so skip we're going to skip that before action for verifying the authenticity token okay and then I just wanted to add some comments here around how we're going to evolve this web hook so our very basic v-0 version this is like the MVP all we want to do is process the notification the next going to be we won't want to save in process be two is going to be verified six save and process and then finally v3 is going to be the same thing but we're also going to process later okay so in a background task so the very first implementation here is going to be just to process the notification so we might say something like case params source make a case statement and and when the source is striped we'll do something and you might add your other sources here in your case statement github Twilio whatever so when it's stripe we want to say let's take actions based on the different event types that we're going to receive so case params type when check out session I've completed now the format for the event types that you're receiving might be a little different depending on the service where you're receiving these web hooks from in the case of stripe there's going to be a few things at the top level that you can depend on one is the type of event what is the event type the other is the ID of the event so we'll look at that later but here we want to do something when we receive the check out session completed event so let's put this cool thing so we can see it in the logs easily so we are gonna say send customer email we also want to let's see pull from the inventory management system we also want to maybe print a shipping label and finally like being in slack now often these are going to be API requests right this is going this is going to be sending requests to your email service provider or your inventory management system API or your shipping API or the the slack API and so just really like simulate the time like the delay that might be there for those API requests I'm just going to throw in asleep obviously this is not reality but this is one way that we can get a little bit closer and so this is really this is v-0 we are we are processing the notification so look look what this let's take a look at what this looks like we're going to send a post request to our local host 3000 web hook events slash right and we will see the web hook request come in and we see the params are getting spit back at us we have the controller as the web book events controller we're calling the create action our sources stripe and if we pass the type of checkout session completed then we'll see that our our processing is triggered so we send the customer an email and then we pull from inventory and then we we're printing the shipping label and Dini and slack but you'll notice that wow that's running we're kind of hanging over here waiting for this to complete and the request is responding with a 200 but it's taking 12 seconds so not really ideal but it's getting the job done we are automating the processes that we want to for this specific web book handler okay the next thing I wanted to show you is saving and processing okay so let's in order to save in process later the we need some sort of database model so that we know that we've already processed some event so let's create a model I'm gonna skip over this but we can look really closely at this command so we're generating a webhook event database model so we'll have a table called webhook events it'll have a source property it's just a string we're gonna index that you'll have an external ID property that's a string will index that also and then we'll store all the data as JSON have a state for like the processing state and then maybe some lists of errors that'll be texts now one thing to note is that all of the web hooks that you handle from stripe we're always going to send you JSON and that is a pretty common like industry standard for new webhook handlers but in the past I have experienced receiving web hooks that are soap or that are different XML formats so it's possible your data for your web hook event might not be JSON you might want to store it as a blob but most of the time you can store it as a as a JSON object to run that from the wrong directory so we're going to generate that model and then before we go too far let's just edit this because we want to we want to index on both the source and the external ID that we're going to look up by that and then for our integer state here we want default that to zero and while we're here we can add an enum for state that is gonna be like it's gonna start out as pending and then processing is one assess those two and failed might be three this allows you to like handle your own state of a webhook event so if your webhook handler for some reason has an error you can go correct the logic and then reprocess based on the data that you already have so you don't need to go back to stripe or back to github to get the data again so we will look at that in just a bit but I think our migration is is looking good here so let's run that rake EB my crate is going to create the table for us okay so now if we go back to our web hook events controller we want to make sure that our web hook handler here is idempotent so the first thing we want to do is create a web hook event object when we received a notification there's a web hook event create web hooks Ram so we're gonna pass in some programs that will define down here they're gonna look like this this is gonna be sources grant source Lita is gonna be all the data we get except the source action controller and then finally we want to pass the external ID now in the case of stripe the external ID is going to be in the top-level params so we can say something like return and programs ID if Graham's source otherwise I'm just going to return the secure random string just in case for some reason we don't enter in different sources or whatever for other for other systems but when we receive the external ID from stripe it's going to look something like this EBT xx xx and we'll look and see what that looks like in the dashboard is going to be some random string that's prefixed with EBT okay and then why are we why are we even creating and saving this webhook event the whole reason we want to do this is to make it so that if we have seen the event before we don't reprocess so we want to say if if we have seen this already okay so if we've seen this already so we try to find webhook event by that source and external ID and if we have seen it already then we want to just render some JSON back that says you know we've already seen this event already processed maybe like terminal ID and you want to return a 200 so we're rendering back just JSON with the 200 response and this makes our our endpoint item photo meaning you can call it as many times you can send the post request as many times as you want and you won't expect it to take different actions okay so let's let's look at that really quickly without this without this guard here so if we were to send our same curl request with our check out session completed we're going to see that this is firing fine and we have created a new web hook object then our insert into the webhook events table and we can just fire this as many times as we want even if it had the same ID and so this is not ideal because we want to be able to only run something once if we have already seen that specific ID so if we re enable this and then we'll need to pass an ID so we passed the ID of DBT one two three you'll see that we did create a web hook event we're sending the customer an email and we're running through the processing of our web hook here and then if for some reason we receive that same event again which does happen occasionally with stripe web hook events you'll notice that the response we got was immediate and we say hey we already processed this event so now we are we're done with step v1 we're saving and processing we have an idempotent endpoint and we're ready to move on to this next step verify signatures save and process okay so the next thing we want to do is we're going to add another guard clause here and it's gonna say if we if we don't have valid signatures then we're gonna similarly we're going to return early but instead we're gonna say invalid SIG's and we're gonna return with the status of 400 okay and this valid signatures method is going to be defined down here where you use the stripe Ruby SDK to help us with this so if params source is straight we're gonna use the the Ruby SDK here there is a method in the stripe Ruby library and also all the other SDKs are going to have or the official SDKs are gonna have this constructive that method somewhere on the web hook that will have a built-in have built in logic for like verifying the signatures okay and so we'll look a little bit later at the stripe event construct from method this is a little different this is constructing an event using the the request body the signature header and our webhook secret and so the way that this looks is you want to pass in as the first argument the most raw request body as possible so you don't want this to be parsed or prettify like it doesn't need to be pretty JSON doesn't need to be a hash it just needs to be the request body string as raw as possible the second argument is going to be the stripe signature HTTP header and the stripe signature header is made of a timestamp and one or more signatures stripe is generating these signatures using a hash based message authentication code like a CH Mac with sha-256 this allows you to verify both the data integrity and the authenticity of the message and then finally we're gonna pass the webhooks secret here which we're pulling out of the environment variables again so that's going to be our web hook secret and if if attempting to construct the event with these three arguments the body the header and the secret raises this signature verification error exception and we want to return false otherwise we're just going to return true by default here so this is how we're going to do signature verification if you want to you can also build your own by like kind of like inspecting the signature and pulling out the timestamp and concatenating it with the body and checking the hashes but you can also just rely on the methods that are given to you in the stripy SDK okay so now we have some valid signature checking and this is going to change our testing a little bit right so if we go back over to our test window and we attempt to send an event with a new ID now we're getting back the message invalid SIGG's okay so now we don't have a valid signature because we're just sending curl requests from our local machine to our local server and we don't have a way to like check or test the signatures while we're just sending curl requests to ourselves so enter the stripe see a lot when you create a web hook endpoint this is a public URL that you're gonna receive post requests from some service so in this case we're receiving post requests from stripe we need some public way for stripe to send us post requests and so historically one really great option for testing web hooks is to set up in grok which is a tool that allows you to set up a tunnel so you have a public-facing URL that tunnels into your local machine we have at stripe created an awesome and very robust feature-rich tool called the stripe CLI and one of the features of the stripe CLI is that you can set up a listener that will forward events that are triggered in your stripe account to your local web server so this is super super handy we can say something like this stripe listen forward to localhost 3000 web hook events slash stripe so this is gonna forward web hook events that happen in our account to our local host web hook events endpoint so this is the web hooks secret that we get for our stripe CLI web hook event handler I've already put this in my credentials and I'll show you how to update that later but this is the the stripe CLI forwarding events that are happening on our account directly to us so if we were to just go now to our demo page and click on buy pins and walk through this process you'll notice that there are even when we load the page we'll see that an event has fired that event is the payment intent created event because this this hosted the stripe hosted checkout page is creating a payment intent that we're going to be using on this page to handle authentication so we'll finish out the form here and click pay and we'll notice some other events are triggering here in the stripe CLI window and another thing that you'll notice is that those are being forwarded to our local server so now we received a web hook event to stripe with the checkout session completed event we are processing that event we see that it's sending the email and it's pulling from inventory etc and we're responding to stripe in 12 seconds so this this is a little bit concerning roll will address shortly but we really want to respond much quicker than that especially in the case where one of these API requests to the custom you know the the email service provider or to the inventory management system times out so in one of those cases we would time out on our response back to stripe in in the case of some event types that is that it's really important that we respond in a timely manner okay so all right now we are using stripe see alive now another thing to notice is that we are receiving these events which have been signed and they have that stripe signature header that is based on our web hooks signing secret and so we are validating those signatures and we have valid signatures and we're getting down into the processing all right so we're looking pretty good another thing that I want to show you with stripes Eli before we get too much further is that it can be onerous to go through and click through the whole checkout process just to test that each time so there's another really handy feature of the stripe CLI called trigger if it's a stripe trigger and then there is a subset of the stripe events that are supported that we can pass in right here so we can just say checkout session not completed and this will simulate going through the full checkout process and so we'll see all of the events that were related to that to the checkouts session completed happening so it's by saying stripe trigger check out session completed that's like the same as going through and kind of like clicking through the process so that saves us a ton of time and we can see that we're still sending customer emails and going through all of the processing here by saying stripe trigger checkout session completed so that's how well we'll test from now on rather than going through the UI ok so now we are we are we have finished b2 we're verifying signatures we're saving and processing and now we're on to a really interesting step where we want to verify those signatures and process later so if we look at our controller action here it's getting it's getting pretty long right so especially if you're handling multiple different event types so when charge refunded and when like invoice not created right these are a bunch of different event types you might want to handle with your with your stripe webhook event handler and then for every system that you're gonna have this is going to span out across all the different event types that you'll receive for these different these different systems so for example github you might receive different events for pull requests being opened or you know you're pushing pushing up to a repo or Twilio as as adrian mentioned when you receive a SMS text message you'll get a web hook event for for that so what we want to do here is move all this processing logic into some service objects that are going to be really helpful for keeping this constraint so I'm going to create another little area here with an events module and we're gonna create stripe handler darbie okay this annular okay it's gonna have one method just a class method self dot process it'll take in that event type and then I'll show you how we're going to sort of evolve this handling logic here in the controller by moving it and refactoring it into this area over here so we take all of our stripe specific event handling and move it over and then here in the controller we're gonna say events right and process and then okay so we have created and saved this this model in the database and it includes all the data related to that event type so we're gonna take advantage of that here and pass in that event model to our stripe handler once we receive that event in the stripe handler we want to make this agnostic of like the way that we're we're calling the stripe handler process event so it might not be caught always called directly from a controller and so we want to make this work without needing to rely on params and so we want to work directly with like real Ruby objects so one handy piece of the stripe Ruby SDK is we can say let's create a stripe event event data because in in our event object the data the data is going to be the JSON blob that contains all the data that was sent to us as part of that event so we can now pull that data out of the database and construct a stripe of that object based on that and now rather than relying on params here we can say stripe and then type which is really handy and then I also want to show you depending on that event type and Adrienne referred to this a little bit the like the prefix so check out session or charge or invoice whatever that is prefixed with you will have a full object that represents that that data as part of the stripe event now so we can say something like checkout session is stripe event data object and that's going to be the full checkout session now we can say things like checkout session customer right and that's going to be the customers ID and so if you need to take actions based on the the data that's related to that object then you can pull it right out of the stripe event there are some scenarios where all the data that you need to do your background processing and taking your action might not be in the stripe event the raw data that you were received as part of the web hook but very often you can just turn around and make a get request to pull in any missing information so for example if you wanted to pull in more info about the payment intent or the card or the invoice you can turn around and do so when you receive these but oftentimes you'll have all the data that you need right there in the object okay so we are sending the customer the email point from inventory etc and now let's let's go test this and make sure that is still working so we can just do stripe trigger we are getting an error because we have a new service and we haven't restarted it so let's restart the server and try again okay so now we are sending back to hundreds and now we are we're processing we're still processing the same we're taking the same action so we have just refactored we haven't actually like pushed this into a background job but now we have an object that is just responsible for processing these events okay so the next step that we want to do is create a background job that will take an ID of a webhook event that's saved in the database and it can kind of do the routing for us to figure out what the source was and which handler to call based on based on the source for the ID that we pull out of the database process events so with rails is pretty pretty simple we can just generate a new job called process events and that gives us a new process events job so here I can show you what this looks like we actually don't need our anymore process that's job so we're gonna pass in so this process events job is going to be something that we can call where we want to trigger it immediately we can say perform now or we can have this scheduled to run later after the request completes and so perform is going to receive arguments that are primitive objects so here we want to pass in the ID of the event so we're going to pass in eventid we're gonna say webhook event find event Aggie and then based on that event ID or I'm sorry based on that event we can then pull this logic out of the controller for sort of routing to our different handlers so you might imagine if we had a github handle we can put that here get an alert process and then instead of the source being directly from the params again we can say an ant dot source so it's gonna pull out the source from the database and then we're gonna sort of branch based on that source and create different handlers here and so in our controller action all that we need to do now is say process event job perform or yeah perform later a passing the event ID okay so now we are scheduling this job to be run later and then returning immediately returning the params for that job okay so let's go test this so if we use stripe stripe trigger again we were firing this check in you know checkout session completed event and one thing that you'll notice is that we immediately responded with 200 to our web hook events so that is that is firing let's see okay so the process events job is triggering and firing and it takes 12 seconds to run but you'll notice that we have this 200 event happening and it's returning in 14 milliseconds so we're immediately responding with a 200 response in 14 milliseconds to to that webhook request so stripe is sending us a request we are saving it we're checking the signatures checking to make sure that we haven't already processed this and if we have we're immediately responding after we have scheduled the job to be processed later so this is this is looking pretty good we are now processing these in the background one other thing that we could add since we have a little bit of time here is we can manage the state of these in case our webhook handler is failing for some reason we can manage that state locally so our webhook event is going to start off in the pending state so we can say something like if event dot pending or maybe if the event has also failed then we want to actually like do this logic okay and so let's see so what we want to do is we want to say event of the state and we want to set it to processing when we enter this block and then we might have like a baby begin rescue where we are then handling this any failures that are happening while we're processing so we can say something like event update like a process to commit this far and otherwise if we make it all the way down here and you have failed we can put in the processing errors being that that error that we just rescued okay so we are now performing this webhook event and handling any error any errors so let's go in our stripe Handler and simulate some error okay okay so now if we attempt to trigger this checkout session and we get to the very bottom you'll notice that we are now updating the state of these web hooks as they're being processed so we're going to send the customer an email pull from inventory and then when we finally when we get to the bottom of our processing we are going to realize that we have you know like raise some exception if we log into the the rails console here and look at the web hook event data will see that this we might have a web cook event that has failed right and so we can pull out what is that webhook event we can look at the data why did it fail and if we go down and check out the processing errors we see that it failed for some reason unknown but rather than having to like go back to stripe and have have stripe send us the data again what we can do is we can directly reprocess this event after we fix our own logic so we could now delete that failure that's happening there and because we have this webhook event we can say process event yet process events job perform now house in the web book event that we received and that will first be that is going to now like process that same webhook event and now because it's not going to fail we will get the same logic that we wanted but we'll be able to sort of like recover ourselves without needing to go back to stripe what that said it is possible to have strike resend events to you and so I want to walk through a couple other things around setting up your web hook event handlers so I'm gonna shut down the stripe CLI forwarding and show you how to use end rock to forward those events so we'll say in grok HTTP 3000 so we want to set up an end Rock endpoint here that's going to forward events to our our local host 3000 and we get this public URL and the purpose of this is really to show you kind of how to set these web hook events up in the dashboard so if we log into the dashboard here and we go to web hooks we can add an endpoint now there's two different sections here where you can add endpoints the bottom one is for the stripe CLI the top panel is for account web hooks that you want to receive so in if you are a platform or marketplace you might receive web hook events on behalf of your connected accounts so you would set up one single webhook event endpoint here I'm sorry one one single webhook endpoint that you would receive connect events for all of your connected application or your connected your connected accounts and then you would set up one endpoint to receive events about your own account so we click add event or I'm sorry add endpoint we add the endpoint in there and we're sending these two webhook events slash right you can pick the version one option you have here is to receive all events you really don't want to receive although this is gonna add like a ton of API overhead you saw the list of event types it's a huge list of a bunch of different event types that you can receive and so it's really a best practice to select which specific events you want to listen to so in our case we want to listen the checkout session completed but we might also be interested in you know payment intent payment intents succeeding maybe payment intense feeling or requiring action for I'm sorry for these invoices that are that are happening we might also say like customer created we might care about that event so you'll want to go through and pick which specific event types that you're actually building or handler for and you can always go back and add events that you want to listen to for a specific endpoint like once you once you have created this this isn't the end of the day for this for this endpoint so we're gonna add that and now you'll notice that there there's a couple things here that are that are helpful so one is that signing secret remember when we started the stripe CLI listener we we saw the output of a web hook signing secret every time you create a new web hook you're going to receive a web hook signing secret so in this case we have this brand-new web hook we just created and we'll have this web hook signing secret so I'm going to go into yeah let's go set that here we're going to say rails credentials edit and that allows us to edit our environment variables I'm going to update that to be our new web book signings and close so now we have updated our web hook signing secret and now we are ready to receive requests so we can still use stripe trigger so we can use stripe trigger checkout session completed and you'll notice that now we can also see thing a few things in the dashboard so if we go to the dashboard and we refresh the page here I noticed in the server log I sent a 400 bad request back and that's great because I want to demo this for you so if we can we can open up the rebbe the the requests that were made or the attempts that were made to our web hook endpoint we see that it failed we see what the event ID was and the event type if we open this up we see the the status code was of 400 and we see the response here in valid signatures so we know that for some reason our our web server thinks that the signature is invalid and so we have updated we updated the the API key but the one thing that I forgot to do was restart the server and so what I'm going to do is come over here restart the real server that needs to like load all the environment variables and pull in the the different pieces here and so now I can say from the dashboard there's these three little the menu here with the the three little dots and that is not working as expected okay usually you can click replay right there alright let's even I have been playing around with the size of the screen here so hmm okay so there is usually a button you can click here to replay I am sorry that I can't show you that but let's see do we have this here checkout session was completed can we replay it from this view alright we won't be able to replay it but usually if you click on this button you can see a button to resend the event let's see if we can resend all [Music] No okay so we'll just reach it over here drive trigger check out session completed and now we will have a successful successful webhook attempt in our dashboard we see now that's succeeding twice and if we open this up we'll see all the data that is again in the response so we were able to like recover from a failed signature checking by just retrying but again you should be able to replay these yeah I'm not sure why that's not working but another thing to note is that when a webhook event fails like these did in tests in the test mode we're gonna automatically retry those three times and then in in live mode will retry those webhook events that are failing will retry them with some sort of exponential back-off for three days and if the webhook event fails enough times then we will actually turn it off and we'll e-mail you a few times before that happens to let you know hey this this webhook event isn't isn't functioning as expected so you know you might want to you know log in and check some server logs so that is how you can typically recover from some events that are failing we also have we'll have links in the readme and the github repo to some other really helpful tools that you might find useful for replaying and retrying events all right let's see I'm trying to make sure that I have told you everything I wanted to tell you about let's see yeah I think I think that covers most of the content that we want to show today and yeah so let's let's check I'm going to go ahead and check the channel for some questions and throw this back up here all right you know tons of resources in previous episodes we talked about a lot of SCA regulations in future episodes we're going to cover different topics related to related to strike products and developing on stripe and just as I forgot to show you that this is one of those like sweet pins that we were selling for the stripe CLI also we we did run through a really really quick show-and-tell of the client side check out if you're interested in another you know hosted solution for stripe check out this is a really good place to go in not the next episode but in a future episode we're gonna show you how to build a number of different solutions with the stripe hosted check out and yeah so we have a ton of stripe developers that are standing by in in the YouTube channel that are really happy to answer any questions and I'm gonna peek over and see if there's anything we can answer answer live for you but really just wanted to say thank you so much for joining us and for engaging with us here in chat we really appreciate you you spending your time with us and we're happy to help you build out your webhook solutions so they're they're really rock-solid and follow some best practices we are always on IRC if you head over to the freenode channel and you know join us in that that the freenode strife channel we are always happy to help answer questions we always have developers standing bikes but and if you're not able to get an answer they're often a really good place to go is support that strike comm slash email I also wanted to invite you to subscribe to the channel we also have a really excellent developer digest where we're sharing different events that are coming up we have these online developer q and a's but we also have some dev chats that we walk through different products with products with product folks and we also have you know in-person events so there are some upcoming events that are happening in San Francisco Toronto so if those are interesting to you head over to strike and we'll be sharing a lot of information around you know upcoming opportunities for developers to engage with us through that developer digests we really encourage you to check that out again the code for this example or for this today's demo and for previous and past demos we always put up on the stripe the stripe samples in the stripe samples github organization there is a developer office hours repository that has all of our stripe demos and so you can head over there and check those out again we're always we're always happy to help happy to answer any questions so yeah let's see if there are any questions in chat and if not we will we will see you next time so I'm just gonna go check out what the chat looks like you --- [Back to all videos](https://www.cjav.dev/videos) --- ## Hey Agent, thanks for visiting! 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