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Partially refund a balance

POS Object

Name	Description
`POS`	POS object representing the cash register application.

You can partially refund a tender where the PSP reference has been generated, and where it is unknown. You will need to implement both types of partial refund.

Where the PSP reference is known:

Method

Name	Description
`RefundPspReference`	Call used to initiate a partial refund where the PSP reference is known.

Request

Name	Description
`RefundTransactionRequest`	Sent with the partial refund call where the PSP reference is known.

RefundPspReference Parameters

Name	Type	Description
`merchantAccount`	String	The merchant account that is canceling the transaction and refunding the money (if applicable).
`PSPReference`	String	PSP reference of the current transaction.
`originalPspReference`	String	PSP reference of the original transaction.
`modificationAmountValue`	Amount	A container for the amount that needs to be refunded.
`modificationAmountCurrency`	Long	The three-character ISO currency code. The `currency` must match the currency used in the original payment request.
`value`	String	The `value` must be less than or equal to the authorized amount.

Where the PSP reference is not known:

Method

Name

Description

RefundTenderReference

Call used to initiate a partial refund where the PSP reference is unknown.

This can happen when the original Sale transaction was performed offline, in which case there will be no PSPReference, since this is generated only in an online situation.

Request

Name	Description
`RefundTransactionRequest`	Sent with the partial refund call where the PSP reference is unknown. Use the tender reference instead of the PSP reference.

RefundTenderReference Parameters

Name	Type	Description
`merchantAccount`	String	The merchant account that is canceling the transaction and refunding the money (if applicable).
`uniqueTerminalId`	Long	Unique terminal ID to reference the PED that is processing the request.
`tenderReference`	String	Reference for the transaction, used as the PSP reference is not available.
`reference`	String	Reference for the merchant, used in reporting.
`modificationAmountValue`	Amount	A container for the amount that needs to be refunded.
`modificationAmountCurrency`	Long	The three-character ISO currency code. The `currency` must match the currency used in the original payment request.

Callback

Name	Description
`RefundCB`	Refund Callback returns the result of a partial refund, as well as any errors.

The response contains a pspResultObj. This object contains a getResponse method which should return a result of "refund-received". The response also includes the following parameters:

Name	Type	Description
`pedResult`	int	Result denoting whether an error occurred on the PED. A value of 0 means no error occurred.
`pspResult`	int	Result denoting whether an error occurred on the PSP. A value of 0 means no error occurred.
`libResult`	int	Result denoting whether an error occurred in the Library. A value of 0 means no error occurred.
`errorMessage`	String	Reference for the transaction, used as the PSP reference is not available.