I'm using Authorize.net as my payment processor. When I try to make a transaction it is not working properly because of the MD5Hash. I set up a variable and it is not working, in the authnet manual it says
"if the MD5 Hash value configured by the merchant in the Merchant Interface is "wilson," the API Login ID is “myAPIloginid”, the Transaction ID is 987654321, and the amount is $1.00, then the field order used by the payment gateway to generate the MD5 Hash would be as follows."
Ok well I know everything but the transaction id, where do I get the transaction id? Is it generated by authorize.net or do I have to make one?