Write a Cliptocurrency Exchange Script

You need a PHP scripting specialist. You need to write a PHP script with an admin in the form of a file in which cryptocurrency courses will be recorded. On the user part of the script in JavaScript should be written calculator, which allows you to convert the desired amount from one currency to another, as well as a large button "Please make a request". After clicking this button, there should be a form with my details, where the user can pay, as well as with the user’s details field, where I will have to transfer money to him. All.