Abort request

The client app must implement a mechanism to send messages using Android intents and URI calls and to receive the result in a custom URI callback.

• Abort request originating from the client app to abort (if possible) the last Sale request.
• Abort response originating from the card terminal app to return the result of an Abort request.

Abort request

Using abort action user tries to abort a transaction he started from the third-party app. Abort will not always succeed as in some cases it is not possible to abort the transaction. For a typical abort transaction request, the client app must provide the following information:

Field	Description	Example	Card terminal support
scheme	The Viva's custom URL scheme, the host and the version.	'vivapayclient://pay/v1'
merchantKey	The merchant's key. For successful validation, should not be empty. Deprecated: you may pass any value.	'SG23323424EXS3'
appId	The client app ID. For successful validation, should not be empty.	'com.example.myapp'
action	Cancel transaction. For successful validation, should not be empty.	'abort'
callback	The URI callback that will handle the result. For successful validation, should not be empty.	'mycallbackscheme://result'

The above information elements must create a URI call, i.e.

Intent payIntent = new Intent(Intent.ACTION_VIEW, Uri.parse( "vivapayclient://pay/v1"
			+ "?merchantKey=MY_MERCHANT_KEY"
			+ "&appId=com.example.myapp"
			+ "&action=abort"
			+ "&referenceNumber=123456"
			+ "&callback=mycallbackscheme://result"));


payIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
payIntent.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
startActivity(payIntent);

Abort response

After executing an abort transaction, the Card Terminal App responds with an abort response result to indicate if the abort request has been successful or not. Also, we should state that the response from the abort action is actually a response of a failed transaction.

The result is received as a URI in the callback activity intent:

Uri result = getIntent().getData()

The table below summarises the contents of an approved response.

Field	Description	Example	Card terminal support
callback	The URI callback that will handle the result.	'mycallbackscheme://result'
status	The status of the transaction.	'success'
message	A string containing information about the transaction status.	'Transaction successful'
action	Cancel transaction.	'abort'

A cancel response result for an approved refund looks as follows:

mycallbackscheme://result?status=fail&message=(-57) ABORTED&action=ABORT&amount=10&tipAmount=0

It is expected that if we have not started a transaction the Abort action will respond (-55) NOTHING_TO_ABORT. A failed Abort action response looks as follows:

mycallbackscheme://result?status=fail&message=(-55) NOTHING_TO_ABORT&action=ABORT

In some cases (when the transaction has been sent to server for approval / user selected payment with QR) the transaction cannot be aborted, and the Card Terminal app will not send the Abort response.

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