How to set up custom PayPal payments on a web application - paypal

Question

I am currently working on a project that needs to include some functionality to allow me to set an amount and a recipient for a PayPal payment, and then display a button to a user who can then complete the payment. I will also need to confirm that the payment was successful.
I am building it as an MVC application using the ASP.net framework.

Answer 1

Since you want to be able to confirm the payment is successful, you need a server-side integration. Here is a demo pattern of the UI: https://developer.paypal.com/demo/checkout/#/pattern/server
Note that it does fetch() XHR calls to two server endpoint of yours, which will need to implement v2/orders API calls to initially set up the payment, and then later capture it --- which provides confirmation of success/failure. More information on the server-side portion can be found here: https://developer.paypal.com/docs/checkout/reference/server-integration/ ; there is a .NET v2 Checkout SDK available.
Normally you need the ClientID and Secret of each receiver's REST APP (this is preferred, since PayPal account emails can change) -- but alternatively, you can use your own REST APP and specify the receiver's PayPal email address in the payee field:
purchase_units: [{
payee: {
email_address: 'replacewithrealemail#somewhere.com'
},
amount: {
value: '1.00'
}
}]