Hello, I am ready to complete this project. I am new in freelance, but not new to software development. I have experience in creating OpenCard extensions. I created the payment module and the search module for OpenCart. Also I have experience in modifying OpenCart core files and in use Virtual Quick Mod.
I can take the account number, calculate the License Key from it according to your algoritm, show the License Key to the customer and (or) send this Licence Key to the customer by email. I have to complete the work in accordance with your expectations.
Best regards,
Roman