I'm new to magento.I'm working on magento 2 custom checkout module due to integration with client ERP system.
All of my checkout process are using custom table like
My question is how can I add PayPal Checkout button on my custom page and when click the button retrieve data from my custom table etc ..
grand_total,currency,item_detils and submit to PayPal to complete payment process.Please also see on below picture.
Please help me. Thank You.