My requirement is to configure WSO2 esb to receive ISO8583 payload from tcp transporter and process data and send response in iso8583 message format using tcp .
Thank You
You can achieve this via writing your own class mediator or writer your own custom transport sender, listener, message formatter and builder.
In my past experience, I have seen financial institutes do the heavy modification on the message formats based on their custom requirement. Hence it is quite difficult to determine the generic format and elements of the messages most of the time.
You can find the sample for writing Transport sender and listener, message formatter and builder in [1]. [1]http://manoj-fernando.blogspot.com/2013/08/iso8583-with-wso2-esb.html