TipAdjustment Method
This methods adds a tip to the original sale transaction.
Syntax
globalcharge.tipAdjustment(PNRef, gratuityAmount, [callback])
Callback
The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).
The callback for this method is defined as:
function(err){ }
'err' is the error that occurred. If there was no error, then 'err' is 'null'.
'err' has 2 properties which hold detailed information:
err.code err.message
Remarks
To add a tip to a transaction simply call TipAdjustment with the PNRef parameter set to the PNRef of the transaction you wish to adjust, and the GratuityAmount to the amount you wish to add.