I made a PHP-based one a while ago before Duolingo offered Swahili. It probably needs a little upgrading, ha. A cool project and you can do it for most things. Oh plus it’s raw PHP so snappy as heck you youngins. https://github.com/ryanchausse/githeri

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IMO, blockchain technology is good for one use case: illegal transactions.

I think all else can be achieved more efficiently by using a trusted third party write-only database, such as the ones available on AWS, and you’d also have the benefit of being able to go to court to seek relief. Some blockchain markets are basically reinventing banking systems and preexisting financial law - systems that have been built over centuries and have quite a bit of knowledge baked in.

I do like the shift to proof of stake from proof of work, but this tech is silly to me.