Custom Payment Method for WooCommerce -- 3

What we have:

Domain1.com - Wordpress with Woocommerce

Domain2.com - Wordpress with Woocommerce


What is needed:

Payment method plugin for Domain1.
During checkout on Domain1 the user selects Custom_PaymentMethod, click Continue to Payment
Set Domain1 Order Status to Processing

The form sends Order_Number + Order_Total + Shipping Method + Status to Domain2 ---> Save all 3 in separate database / table in Domain2

Automatically redirect from Domain2 to PayPal checkout page with two integers:
Order_Total ---> Amount
Order_Numnber ---> Paying for (number only)

User sees PayPal checkout page for the order amount and paying for "ORDER_NUMBER".

If paid successfully - display success URL, change status in Domain2 separate database to Paid.

If payment not completed - display payment not successful URL, delete order from separate database on Domain2.

*** If you can do this WITHOUT PayPal API - please mention this ***


Admin page (separate PHP page, not wordpress):

Display all paid orders SORT by Shipping_Method

Next to each order there two buttons, Complete + Delete and Delete Only

Complete + Delete button ---> Set order status to Complete on Domain1, delete this entry from Domain2 database

Delete Only button ---> Don't touch Domain1 order status, delete this entry from Domain2 database

I cannot provide wp-admin access or site URL or FTP, you need to do this on your own Wordpress.

Any reply without " I have fully read and undertstood what needs to be done and I can do it without wp-admin access or site URL " will be ignored