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We are integrating a project with a payment processor's switch which uses a standard ISO 8583 interface (version 1987).
There are some fields in the ISO message which need to contain a 'Network International Identifier'.
There is a TPDU which is part of the header for each request / response
There will be a Test NAC IP Address and Test NAC PORT which we need to communicate with.
Requires knowledge of Sockets to create the connection in PHP.
For all transactions, to uniquely identify your terminal, we will create a unique terminal and merchant ID. You have to send this in each message where specified in the document -
Terminal ID: H0000008
Merchant ID: S10000000000006
We have a requirement to convert data into an ISO 8583 format string
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