How to implement buy button in app so customers can go to PayPal or payoneer and pay

im making a lottery app and need buy button for people to purchase tickets via PayPal or payoneer in app how to do it

After you set up your pro paypal account and have all your credentials (like API token), you’d need to install the HTTP request flow function from the flow function market. Then attach that HTTP request function to your onTap button event and set up your HTTP request with the right Paypal credentials by following their Developers’ API documentation.