MAC label assigned to POS during original REGISTER
transaction
MAC
Required
Base64
Encoded
Data
NA
NA
COUNTER value encrypted by 128-AES MAC_KEY.
This value is Base64 encoded
COUNTER
Required
Numeric
1
10
The value of counter is incremented by the POS for each
request. Min value: 1 and Max value: 4294967295
Response Packet
Field
Type
Value
Comments
RESPONSE_TEXT
Character
Match
RESULT
Character
OK or Error Code
Refer to <Error Section>
RESULT_CODE
Numeric
-1,
59001,
59020,
59040,
59051,
TERMINATION_STATUS
Character
SUCCESS or
Error Codes
COUNTER
Numeric
Value entered by
user
Echoes counter sent in the request
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