Initial commit

Created from https://vercel.com/new

.env.local.example

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+# Update these with your Supabase details from your project settings > API
+NEXT_PUBLIC_SUPABASE_URL=https://your-project.supabase.co
+NEXT_PUBLIC_SUPABASE_ANON_KEY=
+SUPABASE_SERVICE_ROLE_KEY=
+
+# Update these with your Stripe credentials from https://dashboard.stripe.com/apikeys
+NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY=pk_test_1234
+STRIPE_SECRET_KEY=sk_test_1234
+STRIPE_WEBHOOK_SECRET=whsec_1234
+
+# Update this with your stable site URL only for the production environment.
+NEXT_PUBLIC_SITE_URL=https://your-deployment-url.vercel.app

.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# vercel
+.vercel
+
+# editors
+.vscode

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2021 Vercel, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Next.js Subscription Payments Starter
+
+The all-in-one starter kit for high-performance SaaS applications.
+
+## Features
+
+- Secure user management and authentication with [Supabase](https://supabase.io/docs/guides/auth)
+- Powerful data access & management tooling on top of PostgreSQL with [Supabase](https://supabase.io/docs/guides/database)
+- Integration with [Stripe Checkout](https://stripe.com/docs/payments/checkout) and the [Stripe customer portal](https://stripe.com/docs/billing/subscriptions/customer-portal)
+- Automatic syncing of pricing plans and subscription statuses via [Stripe webhooks](https://stripe.com/docs/webhooks)
+
+## Demo
+
+- https://subscription-payments.vercel.app/
+
+[![Screenshot of demo](./public/demo.png)](https://subscription-payments.vercel.app/)
+
+## Architecture
+
+![Architecture diagram](./public/architecture_diagram.svg)
+
+## Step-by-step setup
+
+When deploying this template, the sequence of steps is important. Follow the steps below in order to get up and running.
+
+### Initiate Deployment
+
+#### Vercel Deploy Button
+
+[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fvercel%2Fnextjs-subscription-payments&env=NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY,STRIPE_SECRET_KEY&envDescription=Enter%20your%20Stripe%20API%20keys.&envLink=https%3A%2F%2Fdashboard.stripe.com%2Fapikeys&project-name=nextjs-subscription-payments&repository-name=nextjs-subscription-payments&integration-ids=oac_VqOgBHqhEoFTPzGkPd7L0iH6&external-id=https%3A%2F%2Fgithub.com%2Fvercel%2Fnextjs-subscription-payments%2Ftree%2Fmain)
+
+The Vercel Deployment will create a new repository with this template on your GitHub account and guide your through a new Supabase project creation. The [Supabase Vercel Deploy Integration](https://vercel.com/integrations/supabase-v2) will set up the necessary Supabase environment variables and run the [SQL migrations](./supabase/migrations/20230530034630_init.sql) to set up the Database schema on your account. You can inspect the created tables in your project's [Table editor](https://app.supabase.com/project/_/editor).
+
+Should the automatic setup fail, please [create a Supabase account](https://app.supabase.com/projects), and a new project if needed. In your project, navigate to the [SQL editor](https://app.supabase.com/project/_/sql) and select the "Stripe Subscriptions" starter template from the Quick start section.
+
+### Configure Auth
+
+In your Supabase project, navigate to [auth > URL configuration](https://app.supabase.com/project/_/auth/url-configuration) and set your main production URL (e.g. https://your-deployment-url.vercel.app) as the site url.
+
+Next, in your Vercel deployment settings, add a new **Production** environment variable called `NEXT_PUBLIC_SITE_URL` and set it to the same URL. Make sure to deselect preview and development environments to make sure that preview branches and local development work correctly.
+
+#### [Optional] - Set up redirect wildcards for deploy previews
+
+For auth redirects (email confirmations, magic links, OAuth providers) to work correctly in deploy previews, navigate to the [auth settings](https://app.supabase.com/project/_/auth/url-configuration) and add the following wildcard URL to "Redirect URLs": `https://*-username.vercel.app/**`. You can read more about redirect wildcard patterns in the [docs](https://supabase.com/docs/guides/auth#redirect-urls-and-wildcards).
+
+#### [Optional] - Set up OAuth providers
+
+You can use third-party login providers like GitHub or Google. Refer to the [docs](https://supabase.io/docs/guides/auth#third-party-logins) to learn how to configure these. Once configured, you can add them to the `provider` array of the [`Auth` component](./app/signin/AuthUI.tsx) page.
+
+#### [Maybe Optional] - Set up Supabase environment variables (not needed if you installed via the Deploy Button)
+
+If you've deployed this template via the "Deploy to Vercel" button above, you can skip this step. Otherwise navigate to the [API settings](https://app.supabase.com/project/_/settings/api) and paste them into the Vercel deployment interface. Copy project API keys and paste into the `NEXT_PUBLIC_SUPABASE_ANON_KEY` and `SUPABASE_SERVICE_ROLE_KEY` fields, and copy the project URL and paste to Vercel as `NEXT_PUBLIC_SUPABASE_URL`.
+
+Congrats, this completes the Supabase setup, almost there!
+
+### Configure Stripe
+
+Next, we'll need to configure [Stripe](https://stripe.com/) to handle test payments. If you don't already have a Stripe account, create one now.
+
+For the following steps, make sure you have the ["Test Mode" toggle](https://stripe.com/docs/testing) switched on.
+
+#### Create a webhook
+
+We need to create a webhook in the `Developers` section of Stripe. Pictured in the architecture diagram above, this webhook is the piece that connects Stripe to your Vercel Serverless Functions.
+
+1. Click the "Add Endpoint" button on the [test Endpoints page](https://dashboard.stripe.com/test/webhooks).
+1. Enter your production deployment URL followed by `/api/webhooks` for the endpoint URL. (e.g. `https://your-deployment-url.vercel.app/api/webhooks`)
+1. Click `Select events` under the `Select events to listen to` heading.
+1. Click `Select all events` in the `Select events to send` section.
+1. Copy `Signing secret` as we'll need that in the next step.
+1. In addition to the `NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY` and the `STRIPE_SECRET_KEY` we've set earlier during deployment, we need to add the webhook secret as `STRIPE_WEBHOOK_SECRET` env var.
+
+#### Redeploy with new env vars
+
+For the newly set environment variables to take effect and everything to work together correctly, we need to redeploy our app in Vercel. In your Vercel Dashboard, navigate to deployments, click the overflow menu button and select "Redeploy" (do NOT enable the "Use existing Build Cache" option). Once Vercel has rebuilt and redeployed your app, you're ready to set up your products and prices.
+
+#### Create product and pricing information
+
+Your application's webhook listens for product updates on Stripe and automatically propagates them to your Supabase database. So with your webhook listener running, you can now create your product and pricing information in the [Stripe Dashboard](https://dashboard.stripe.com/test/products).
+
+Stripe Checkout currently supports pricing that bills a predefined amount at a specific interval. More complex plans (e.g., different pricing tiers or seats) are not yet supported.
+
+For example, you can create business models with different pricing tiers, e.g.:
+
+- Product 1: Hobby
+  - Price 1: 10 USD per month
+  - Price 2: 100 USD per year
+- Product 2: Freelancer
+  - Price 1: 20 USD per month
+  - Price 2: 200 USD per year
+
+Optionally, to speed up the setup, we have added a [fixtures file](fixtures/stripe-fixtures.json) to bootstrap test product and pricing data in your Stripe account. The [Stripe CLI](https://stripe.com/docs/stripe-cli#install) `fixtures` command executes a series of API requests defined in this JSON file. Simply run `stripe fixtures fixtures/stripe-fixtures.json`.
+
+**Important:** Make sure that you've configured your Stripe webhook correctly and redeployed with all needed environment variables.
+
+#### Configure the Stripe customer portal
+
+1. Set your custom branding in the [settings](https://dashboard.stripe.com/settings/branding)
+1. Configure the Customer Portal [settings](https://dashboard.stripe.com/test/settings/billing/portal)
+1. Toggle on "Allow customers to update their payment methods"
+1. Toggle on "Allow customers to update subscriptions"
+1. Toggle on "Allow customers to cancel subscriptions"
+1. Add the products and prices that you want
+1. Set up the required business information and links
+
+### That's it
+
+I know, that was quite a lot to get through, but it's worth it. You're now ready to earn recurring revenue from your customers. 🥳
+
+## Develop locally
+
+If you haven't already done so, clone your Github repository to your local machine.
+
+Next, use the [Vercel CLI](https://vercel.com/download) to link your project:
+
+```bash
+vercel login
+vercel link
+```
+
+### Setting up the env vars locally
+
+Use the Vercel CLI to download the development env vars:
+
+```bash
+vercel env pull .env.local
+```
+
+Running this command will create a new `.env.local` file in your project folder. For security purposes, you will need to set the `SUPABASE_SERVICE_ROLE_KEY` manually from your [Supabase dashboard](https://app.supabase.io/) (`Settings > API`).
+
+### Use the Stripe CLI to test webhooks
+
+[Install the Stripe CLI](https://stripe.com/docs/stripe-cli) and [link your Stripe account](https://stripe.com/docs/stripe-cli#login-account).
+
+Next, start local webhook forwarding:
+
+```bash
+stripe listen --forward-to=localhost:3000/api/webhooks
+```
+
+Running this Stripe command will print a webhook secret (such as, `whsec_***`) to the console. Set `STRIPE_WEBHOOK_SECRET` to this value in your `.env.local` file.
+
+### Install dependencies and run the Next.js client
+
+In a separate terminal, run the following commands to install dependencies and start the development server:
+
+```bash
+npm install
+npm run dev
+# or
+yarn
+yarn dev
+```
+
+Note that webhook forwarding and the development server must be running concurrently in two separate terminals for the application to work correctly.
+
+Finally, navigate to [http://localhost:3000](http://localhost:3000) in your browser to see the application rendered.
+
+## Going live
+
+### Archive testing products
+
+Archive all test mode Stripe products before going live. Before creating your live mode products, make sure to follow the steps below to set up your live mode env vars and webhooks.
+
+### Configure production environment variables
+
+To run the project in live mode and process payments with Stripe, switch Stripe from "test mode" to "production mode." Your Stripe API keys will be different in production mode, and you will have to create a separate production mode webhook. Copy these values and paste them into Vercel, replacing the test mode values.
+
+### Redeploy
+
+Afterward, you will need to rebuild your production deployment for the changes to take effect. Within your project Dashboard, navigate to the "Deployments" tab, select the most recent deployment, click the overflow menu button (next to the "Visit" button) and select "Redeploy" (do NOT enable the "Use existing Build Cache" option).
+
+To verify you are running in production mode, test checking out with the [Stripe test card](https://stripe.com/docs/testing). The test card should not work.
+
+## A note on reliability
+
+This template mirrors completed Stripe transactions to the Supabase database. This means that if the Supabase database is unavailable, the Stripe transaction will still succeed, but the Supabase database will not be updated, and the application will pass an error code back to Stripe. [By default](https://stripe.com/docs/webhooks/best-practices), Stripe will retry sending its response to the webhook for up to three days, or until the database update succeeds. This means that the Stripe transaction will eventually be reflected in the Supabase database as long as the database comes back online within three days. You may want to implement a process to automatically reconcile the Supabase database with Stripe in case of a prolonged outage.

app/account/ManageSubscriptionButton.tsx

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+'use client';
+
+import Button from '@/components/ui/Button';
+import { postData } from '@/utils/helpers';
+
+import { Session } from '@supabase/supabase-js';
+import { useRouter } from 'next/navigation';
+
+interface Props {
+  session: Session;
+}
+
+export default function ManageSubscriptionButton({ session }: Props) {
+  const router = useRouter();
+  const redirectToCustomerPortal = async () => {
+    try {
+      const { url } = await postData({
+        url: '/api/create-portal-link'
+      });
+      router.push(url);
+    } catch (error) {
+      if (error) return alert((error as Error).message);
+    }
+  };
+
+  return (
+    <div className="flex flex-col items-start justify-between sm:flex-row sm:items-center">
+      <p className="pb-4 sm:pb-0">Manage your subscription on Stripe.</p>
+      <Button
+        variant="slim"
+        disabled={!session}
+        onClick={redirectToCustomerPortal}
+      >
+        Open customer portal
+      </Button>
+    </div>
+  );
+}