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SCA Functional Specification

APPLY UPDATES

Last updated: 04-Dec-2024

This command allows the POS to signal the device to immediately apply any pending updates from VHQ. SCA will inform VHQ to defer the updates if a transaction is in progress.

Device UI Required: Yes

Request Packet
Field Rule Type Min Max Value Comments
FUNCTION_TYPE Required Static
Value
ADMIN Type of function
COMMAND Required Static
Value
APPLYUPDATES Command name
COUNTER Required Numeric 1 10 Ex: 100 COUNTER is used for a given MAC label.
Each COUNTER should be higher than the last one.
NOTE: Used to authenticate the POS.
MAC Required Base64
Encoded
Data
  Message Authentication Code. COUNTER value encrypted
by 128-AES MAC_KEY. This value is Base64 encoded.
NOTE: Used to authenticate the POS.
MAC_LABEL Required Character 1 50 Ex: REG1 Associated label that tells the device which MAC_KEY
to use to decrypt the value of MAC.
NOTE: Used to authenticate the POS.
Example

Following is an example of request packet

<TRANSACTION>
  <FUNCTION_TYPE>ADMIN</FUNCTION_TYPE>
  <COMMAND>APPLYUPDATES</COMMAND>
  <FLAG>TRUE</FLAG>
  <COUNTER>1</COUNTER>
  <MAC></MAC>
  <MAC_LABEL>REG2</MAC_LABEL>
</TRANSACTION>
Response Packet
Field Type Value Comments
RESPONSE_TEXT Character Ex: Updates Approved Processor response text
RESULT Character Ex: OK This indicates the Result details.
RESULT_CODE Numeric -1
59002
59005
59040
59045
This indicates the result code.
NOTE: Refer to Result/Error Codes section.
TERMINATION_STATUS Character SUCCESS or
FAILURE
This indicates the transaction termination status. This is
the overall status of the transaction irrespective of
approved or declined. Like, if the output is generated
then the status is SUCCESS and if no output is generated
then the status will be FAILURE.
TIME Character Ex: 20160521122005 Current time in YYYYMMDDhhmmss format. SCA is required
to query and return the current date/time after it is set.
POS_RECON Character Ex: RetailPOS1 POS reconciliation field echoed back if sent in request.
COUNTER Numeric Ex: 100 Last counter used for the given MAC label.
Example
<RESPONSE>
 <RESPONSE_TEXT>SUCCESS</RESPONSE_TEXT>
 <RESULT>OK</RESULT>
 <RESULT_CODE>-1</RESULT_CODE>
 <TERMINATION_STATUS>SUCCESS</TERMINATION_STATUS>
 <COUNTER>1</COUNTER>
</RESPONSE>

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