How do I detect payments using PayPal v2 and JavaScript?

Question

I'm developing a server that will detect PayPal payments to a specific PayPal account. I've started looking into the PayPal SDK and got lost... I saw that V1 is deprecated, so I probably should use V2.

The only thing that I need is that PayPal will call my server webhook once the account receives money.

How should I do this?

Answer 1

The only thing that I need is that PayPal will call my server webhook

Don't do that. Use a proper server integration.

You need two routes on your server, one for 'Set Up Transaction' and one for 'Capture Transaction', documented here: https://developer.paypal.com/docs/checkout/reference/server-integration/

The best approval flow for the customer to go through is: https://developer.paypal.com/demo/checkout/#/pattern/server , as your site stays loaded in the background, and it does not redirect away from your page.

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When your capture transaction API call runs successfully and completes the order, you will have an immediate response with a payment object and transaction details. Thus, there is no need for the extra asynchronous step of waiting for a separate webhook call (which is prone to errors or exceptions), and your integration will be more robust.