Integrating payment API

Hello bubble developers… I am developing an eCommerce web app and which require users to pay online for a product. I just want to integrate Pesapal payment API within my app but I am getting stuck. Can someone help me designing API calls using API connector. Here are screenshots of the API Documentation page.
Method PostPesapalDirectOrderV4****

Method 2.2 QueryPaymentStatus******

Method QueryPaymentStatusByMerchantRef

Method QueryPaymentDetails

Thank you so much for your time and consideration…

Hi. Did you resolve this?