Understanding Postillon's Sink and Source Node

[Babatunde Oyenekan]

Good day all , I am trying to wrap my head around some payment processor's configurations before diving into actual development . I noticed that only postilion specified implementations for a sink and source node but NIBBS and TIC does not . What is actually the functions of a sink or source node . Is it the same as the general engineering source / sink to determine a source and or destination node? I'll appreciate a little insight. 

Thank's y'all and to JPOS team , y'all are our very own super heroes ! 

[Luther Enahoro]

Hello Babatunde,

Your question is somewhat in the wrong forum. I say this because it's clearly not a jpos user question.

Kindly reach out to me privately for help with necessary documentation to address your need.

Regards,

Luther

On Fri, Nov 25, 2022, 14:45 Babatunde Oyenekan <babsd1st...@gmail.com> wrote:

Good day all , I am trying to wrap my head around some payment processor's configurations before diving into actual development . I noticed that only postilion specified implementations for a sink and source node but NIBBS and TIC does not . What is actually the functions of a sink or source node . Is it the same as the general engineering source / sink to determine a source and or destination node? I'll appreciate a little insight. 

Thank's y'all and to JPOS team , y'all are our very own super heroes ! 

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[murtuza chhil]

I have some previous experience with Postilion so here is my take on it.

The flow is usually 

external network ->source node -> Postilion Transaction Manager -> Sink Node -> Host/external network.

Postilion will have their Source and Sink Nodes to talk to major networks and hosts which you would have to purchase.

Now if you need to talk to Postilion, they have a Source/Sink Node called PostBridge which you would talk to. Use their source node if you need to send requests , use their sink node if you want to receive requests rom them.

You would write something in JPOS that talks to PostBridge ,and it's pretty simple, you use the NACChannel  (2 byte length header) and the postpack xml packager (that will understand the Postbridge ISO8583) that will unpack and pack the messages. 

Search this group for Postilion and there have a lot of posts on it https://groups.google.com/g/jpos-users/search?q=Postilion

Source node would get Requests and translate it to an internal Position ISO8583 and send it to their Transaction Manager. Based on routing config in Postilion the transaction manager updates and forwards Postilion ISO8583 to the sink Node. Sink Node translates this ISO8583 to the external network format.

Transaction matching within the system is done using 127.2 what they call a switch key.

-chhil

[Babatunde Oyenekan]

Thanks very much all , I appreciate your help for the insights .