How to automatically fill in the field in WooCommerce when placing an order from cookies?

Question

WordPress

There is a roystat field that must be filled in automatically at the stage of order formation from a cookie file.
How can this be implemented?
thank.

Answer 1

there is a hook that is called when a new order is formed. like this woocommerce_new_order
you hang a function on it. next you have order_id and $_COOKIE array.
You can do whatever is legal with them.

Answer 2

yes, I decided through substitution on the page through js in the field. decided that way.