PayPal Setup
Create a REST API app and subscribe to capture events.
1. Create a REST API app
Go to https://developer.paypal.com/dashboard and create a REST API app. Copy the Client ID and Secret into your environment configuration.
2. Add a webhook
From https://developer.paypal.com/dashboard/webhooks, add a webhook URL:
http://<your-host>:80/api/purchase/webhook/paypal3. Subscribe to the event
PAYMENT.CAPTURE.COMPLETED
Live vs sandbox
Make sure you are using the right credentials and webhook type for your environment.