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Nextflare

Next.js App running with Lemon Squeezy on Cloudflare.

This Next.js demo app can be used as a base for building subscription-based SaaS apps.

Just clone this repo and build your app alongside the ready-made auth and billing.

Using the following stack:

This template uses the Next.js App Router. This includes support for enhanced layouts, colocation of components, tests, and styles, component-level data fetching, and more.

Compatbile with Cloudflare Pages Functions and serverless deployments.

Customer Portal vs Integrated Billing

Keep in mind that Lemon Squeezy comes with inbuilt Customer Portal that covers all the features from this app and more.

Nonetheless, should you seek a billing solution more closely integrated with your SaaS platform, this template serves as a foundation for creating a seamless, integrated SaaS billing system.

Prerequisites

1. Lemon Squeezy Account and Store

You need a Lemon Squeezy account and store. If you don't have one already, sign up at Lemon Squeezy.

2. Cloudflare Account

This template uses Cloudflare D1 + Drizzle ORM for serverless Database, making it compatible with the Cloudflare Pages Functions. If you don't have an account, you can sign up for free at Cloudflare.

Getting Started

1. Clone the Repo

Start by cloning this repo to your local machine and navigating into the directory.

2. Install Dependencies

Then, install the project dependencies:

pnpm install

3. Set Environment Variables

Copy the .env.example file to .env:

cp .env.example .env

Then, fill in the environment variables:

LEMONSQUEEZY_API_KEY=
LEMONSQUEEZY_STORE_ID=
LEMONSQUEEZY_WEBHOOK_SECRET=

WEBHOOK_URL=

AUTH_GITHUB_ID=
AUTH_GITHUB_SECRET=

AUTH_SECRET=

AUTH_URL=

NEXT_PUBLIC_APP_URL=

Lemon Squeezy

Once you have created an account and store on Lemon Squeezy, make sure you're in Test mode, then go to Settings > API and create a new API key. Copy the key and paste it into .env file where it says LEMONSQUEEZY_API_KEY=.

You will also need the store ID from Lemon Squeezy for LEMONSQUEEZY_STORE_ID, which you can find in the list at Settings > Stores.

Finally, you will need to add a random webhook secret in LEMONSQUEEZY_WEBHOOK_SECRET. A webhook secret is a security key that ensures data received from a webhook is genuine and unaltered, safeguarding against unauthorized access.

Webhook URL

Your local app will need to be able to receive webhook events, which means creating a web-accessible URL for your development project.

This is not available when running your site on its local server without some sort of tunnel.

An easy way to set one up is using a service like untun.

Once you are provided a URL by these services, simply add that in your .env file where it says WEBHOOK_URL=.

Auth

You will need to set up a GitHub OAuth app in order to obtain GITHUB_SECRET and GITHUB_ID to handle authentication.

Refer to the GitHub documentation for setting up GitHub OAuth.

Once you have set up the OAuth app, you will need to add the AUTH_GITHUB_SECRET and AUTH_GITHUB_ID to your .env file.

Additionally, you need to add a random secret for AUTH_SECRET in your .env file. On Linux or macOS, you can generate a random secret using the following command:

openssl rand -hex 32

or go to https://generate-secret.now.sh/32 to generate a random secret.

Next, you need to provide the URL of your app in AUTH_URL in format https://your-app-url.com/api/auth. For local development, you can use http://localhost:3000/api/auth.

Finally, you will need to add the URL of your app in NEXT_PUBLIC_APP_URL. For example, http://localhost:3000.

Open http://localhost:3000 with your browser to see the result.

4. Set Up the Database

Run the following command to set up the database:

pnpm db:migrate:local
pnpm db:migrate:preview
pnpm db:migrate:prod

With Drizzle ORM, you can access the database with Drizzle Studio. Run the following command to open Drizzle Studio:

pnpm db:studio

Go to https://local.drizzle.studio/ to access the database.

5. Run the Development Server

Start the development server:

pnpm dev

That's all, you're ready to go!

How to set up Webhooks

This is a required step.

For your app to receive data from Lemon Squeezy, you need to set up webhooks in your Lemon Squeezy store at Settings > Webhooks.

In the app we have provided an action (Setup webhook button) that demonstrates how you can create a webhook on Lemon Squeezy using the Lemon Squeezy SDK.

When you create a webhook, you should check at least these two events:

  • subscription_created
  • subscription_updated

This app demo only processes these two events, but they are enough to get a billing system in place. You could, for example, extend the app to handle successful payment events to list invoices in your billing system (by subscribing to subscription_payment_success).

The webhook endpoint in your app is /api/webhook, which means if you are manually setting up the webhook, you need to append /api/webook to your webhook URL on Lemon Squeezy. For example, https://your-app-url.com/api/webhook

The server action for creating a webhook via SDK will do that automatically for you.

In the webhook form you need to add a signing secret. Add the same value you use in the form in the LEMONSQUEEZY_WEBHOOK_SECRET environment variable.

Production

There are a few things to update in your code to go live.

You need to turn off the Test mode in your Lemon Squeezy store and add a new live mode API key. Add this API key as an environment variable in your live server, using the same name LEMONSQUEEZY_API_KEY. Your store ID remains the same in both test and live mode, so add that to your server environment variables, as you did for your development site.

You also need to create a new webhook in your live store. Make sure you add the signing secret into the LEMONSQUEEZY_WEBHOOK_SECRET variable on your server.

Credits

This project is ported from https://github.com/lmsqueezy/nextjs-billing