analog of the JPOS (Java[tm] based financial transaction library/framework) on Ruby

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Hi All!

Is there someone who working with a ISO financial protocol ?
Currently, I am working under a simple POS terminal emulator on Ruby.
It very helped me with my work. Already, I ported the part 
(ISOPackager,ISOMsg,GeneralPackager etc) of JPOS framework and think 
what next. 
 
Vlad