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Using Pay with Paddle

Paddle works differently than most of the other payment processors so it comes with some limitations and differences.

  • You cannot create a Customer from the API
  • Checkout only happens via iFrame or hosted page
  • Cancelling a subscription cannot be resumed
  • Payment methods can only be updated while a subscription is active
  • Paddle customers are not reused when a user re-subscribes

Paddle Sandbox

The Paddle Sandbox can be used for testing your Paddle integration.

<script src="https://cdn.paddle.com/paddle/paddle.js"></script>
<script type="text/javascript">
  Paddle.Environment.set('sandbox');
  Paddle.Setup({ vendor: <%= Pay::Paddle.vendor_id %> });
</script>

Paddle Public Key

Paddle uses public/private keys for webhook verification. You can find your public key here for Production and here for Sandbox.

There are 3 ways that you can set the public key in Pay.

In either example, you can set the environment variable or in Rails credentials.

File

You can download the public key from the link above and save it to a location which your Rails application can access. Then set the PADDLE_PUBLIC_KEY_FILE to the location of the file.

Key

Set the PADDLE_PUBLIC_KEY environment variable with your public key. Replace any spaces with \n otherwise you may get a OpenSSL::PKey::RSAError error.

Base64 Encoded Key

Or you can set a Base64 encoded version of the key. To do this, download a copy of your public key then open a rails console and enter the following:

paddle_public_key = OpenSSL::PKey::RSA.new(File.read("paddle.pem"))
Base64.encode64(paddle_public_key.to_der)

Copy what's displayed and set the PADDLE_PUBLIC_KEY_BASE64 environment variable.