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ISO 8583: The language of credit cards
Discover the inner workings of ISO 8583, the global standard for credit card transaction messaging. Learn how it powers payment processing across networks and explore its structure, fields, and real-world applications.
In the end we’ll look at how you might define an ISO 8583 parser in code, grounded in how we process card transactions as an issuer processor connected directly to networks like VisaNet here at Increase. Parsing a basic ISO 8583 message is straight forward and generally only requires the implementation of a bitmap parser and a length definition for each field to be able to handle the primitive elements at the top level. This is the type of decision you want to make for every part of your parser that can possibly fail—have we reached a fatal point of no return or is there a way we can gracefully continue to parse the rest of the message, despite the error we just experienced?
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