I would like a custom payment gateway for WHMCS.
I have a merchant account with a company called AsiaPay.
I would like it so the customers follow these steps.
They select the payment option.
They select there credit/debit card type. This will be a choice between AMEX, visa or mastercard.
They enter in there card details.
The cards details are sent to asia pay for approval along with there address details from WHMCS.
They are forwarded to any 3d auth if needed.
They recieve a successfully/ rejected/ failed page.
After 20 seconds they are forward to the paid invoice or they can click here to forward now.
I do not have a sandbox account with asia pay however i can enter in custom fields for forwarding customers after for the following reasons successfully/ rejected/ failed.
With asiapay you are also required to enter a account number and secure hash. also you can only make payments from my domain name.
I have attached the integration doc to this project.