Merchant APP ID (Alphanumeric - Length of 32 chars and special chars $@%#)
Merchant APP KEY (Alphanumeric - Length of 32 chars and special chars $@%#)
EPI is an end point identifier, Identify the device on valor infrastructure, it's a 10 digit number starts with 2
Base amount of original sale (Ex: 10.00)
Customer gift card number 15 to 19 digits
Customer gift card pin number
200