multiple hooks

That would depend on how you have the donation payment setup. Are you using a basic donate button that you created in PayPal, or did you set that up with Express Checkout, or what exactly?

The best thing to do, probably, is just run a test payment using your donate button, and then check to see what txn_type was used in the raw IPN that gets saved for that payment. Then you would use the hook that corresponds to that txn_type.

So, instead of paypal_ipn_for_wordpress_txn_type_cart you might use paypal_ipn_for_wordpress_txn_type_web_accept, for example.

Glad to hear it!

If you have a moment to leave a review for the plugin that would be greatly appreciated. Thanks!