Polar

First, make sure you’ve defined your payment processor in src/payment/paymentProcessor.ts, as described in the important first steps.

Next, you’ll need to create a Polar account in the sandbox mode. You can do that here.

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Sandbox and Production Mode

Polar features two separate environments:

• Sandbox.
• Production.

They are fully isolated from each other, which means that you need to create seperate organizations for each of them. They also feature independent products, sales, access tokens, etc.

For local development and testing, you’ll want to use Polar’s sandbox mode. To enable sandbox mode, make sure that POLAR_SANDBOX_MODE is set to true in your .env.server file:

.env.server

POLAR_SANDBOX_MODE=true

When you’re ready to deploy your app, we’ll remind you to set this to false.

Polar Organization Access Token

Once you’ve created your account, you’ll need to get your organization access token. You can do that by:

1. Navigating to the Developers section under the Settings > General page.
2. Click on the New Token button to create a new token.
3. Give your token a name (e.g., “Open SaaS Development”).
4. Select an expiration date. No expiration is fine for sandbox mode, but discouraged for production mode.
5. Select the following scopes:
   • checkouts:write
   • customer_sessions:write
   • customers:read
   • customers:write
   • orders:read
6. Copy the generated token and add it to your .env.server file:

   .env.server

   POLAR_ORGANIZATION_ACCESS_TOKEN=polar_oat_...

Creating Products

To create Polar products, in your Polar dashboard:

1. Navigate to Prodcuts > Catalogue page.
2. Click on the + New Product button to create a new product.
3. Fill in the product details.
   • For subscription products, select Recurring subscription pricing.
   • For one-time payment products, select One-time purchase pricing.
4. Click Create Product.
5. Tap the ⠇ icon next to your product and select Copy Product ID.
6. Add the Product ID to your .env.server file. Open SaaS by default expects three products, two subscriptions and one one-time purchase plan:

   .env.server

   PAYMENTS_HOBBY_SUBSCRIPTION_PLAN_ID=<your-hobby-product-id>
   PAYMENTS_PRO_SUBSCRIPTION_PLAN_ID=<your-pro-product-id>
   PAYMENTS_CREDITS_10_PLAN_ID=<your-credits-product-id>

Naming products differently

Note that if you change names of your products, you’ll need to update your app code in src/payment/plants.ts to match these names as well.

Using Polar Webhook in Local Development

Exposing your Webhook Endpoint to the Internet

Polar notifies your Wasp app about customer and payment events through a webhook. However, to make it available to Polar during development, you need to expose your locally running Wasp server (started with wasp start) to the internet.

You can do that by running ngrok on port 3001 (Wasp server runs on port 3001 by default). ngrok will then generate a public URL that we can provide to Polar:

1. First, make sure you have installed ngrok.
2. Once ngrok is installed and your Wasp app is running, run:

   ngrok http 3001

   
3. ngrok will display a forwarding address. Copy this address and append /payments-webhook to it. It should look something like this:

   Callback URL

   https://89e5-2003-c7-153c-72a5-f837.ngrok-free.app/payments-webhook

Creating your Polar Webhook

Next, configure the webhook in your Polar dashboard:

1. Navigate to Settings > Webhooks page.
2. Click Add Endpoint button.
3. In the URL field, paste your ngrok forwarding address with /payments-webhook appended (for example: https://abc123.ngrok-free.app/payments-webhook).
4. Set the Format to "Raw".
5. Select the following events to listen for:
   • order.paid
   • subscription.updated
6. Click Save.
7. Copy the generated webhook secret and add it to your .env.server file:

   .env.server

   POLAR_WEBHOOK_SECRET=polar_whs_...

Testing Payments in Local Development

Before testing payments, make sure that you created and set all the required env variables in .env.server (POLAR_ORGANIZATION_ACCESS_TOKEN, <NAME>_PLAN_ID and POLAR_WEBHOOK_SECRET ) and that your ngrok tunnel is running.

You can then test the payment flow:

1. Click a Buy button for any product on the homepage.
2. You should be redirected to Polar’s checkout page.
3. Fill in the checkout form with test payment information.
4. Complete the payment.
5. You should be redirected back to the checkout success page.

To verify everything executed correctly you can:

• Check Polar webhook event logs:
  1. Navigate to Settings > Webhooks page
  2. Click the Details button of your previously created webhook.
  3. Confirm all of the events have been successful:
• Inspect your database’s User table:
  1. Run Wasp DB studio:

     wasp db studio

  2. Navigate to localhost:5555 and check the User table.
  3. Confirm the subscriptionStatus is active for the user who made the purchase.