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Credit card authorization
Has anyone ever created an app where they duplicate a CC terminal in software? I'm assuming that the data transfer is tiny for a cc auth and it should be a fairly simple excercise, using some kind of comm toolkit, to put together the string, dial out and wait for the reply. The only part I don't know is the string format. Are there any common formats or ideally, a single data format to use? Thanks.
Gary
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