Dear Client,
I hope this proposal finds you in good health. I have fully read and understood your project requirements, and I can confidently assure you that I am capable of delivering the solution you need without requiring wp-admin access or the site URL.
To summarize, you are seeking a custom payment method plugin for your Domain1 website, which will allow users to select the "Custom_PaymentMethod" option during checkout. Once selected, the order details, including the Order_Number, Order_Total, Shipping Method, and Status, will be sent to your Domain2 website and saved in a separate database or table.
After the form submission, the user will be automatically redirected to the PayPal checkout page on Domain2. The PayPal checkout page will display the Order_Total, and the user will be informed that they are paying for the specific "ORDER_NUMBER." If the payment is successful, the user will be redirected to a success URL, and the order status in the Domain2 separate database will be updated to "Paid." In case of an unsuccessful payment, the user will be redirected to a payment not successful URL, and the corresponding order entry will be deleted from the Domain2 database.
Additionally, you require an admin page, separate from WordPress, to display all paid orders sorted by Shipping_Method. Each order will be accompanied by two buttons: Complete + Delete and Delete Only. Clicking the Complete + Delete button will set the o...