Merchant APP ID (Alphanumeric - Length of 32 chars)

Merchant APP Key (Alphanumeric - Length of 32 chars)

EPI is an end point identifier, Identify the device on valor infrastructure, it's a 10 digit number starts with 2

Transaction amount - Maximum amount $99,999.99 (Ex: 0.1 to 99,999.99). A request should not be sent when the amount is 0. The amount must be greater than zero

Set the message type as 'refund'

RRN number from sale txn response (Numeric - Max length of 15 chars)

Reference transaction id for sale

STAN number (Numeric - Max length of 6 chars)

Should match the original sale tran_no (Numeric - Max length of chars 11)

Approval code response from sale transaction (Alphanumeric - Max length of 8 chars)

Sale refund set us value 1

Mode of transaction (length of 3 chars)

To identify the card type check Credit or Debit

It is the userid of the merchant to be updated

A unique id of the request, A client can send any number of 10 digit

Customer phone number- 10 digit Numeric (Ex: 5247896523)

Customer email id - Varchar (Ex: [email protected], Max length of 50 chars)

Customer user name (Alphanumeric length of 25 chars)

Shipping address customer name - Alphabet (Max length of 25 chars)

To remove the surcharge fee set value 0 else set 1

Check the condition of transaction (length of max 3 chars)