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VIVA's code base is Hyper Ledger Fabric with some significant changes to the backing store and a lot of custom chain code. It's called Ultra Ledger and it will be on github sometime post ICO. Right now it's just really early days and a ton of branches on my local repo as I work a path from "architecture document", to at least an alpha code base people can tinker with. Thanks for asking!

I haven't had a chance to look into the detail of Hyper Ledger. Keep me update when anything public is available.

There are some repros under the organization github.com/vivacoin/ I was using it mainly for the webpage creation i the eariel stages, wecwill go back to that later. There are also some tools which have been used in the past. Other stuff is created internally. Our sister site exchange tradeqwik is based on this repro https://github.com/txbits/txbits

I will take a look. Thanks

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