Create Java (JNI) binding

[axic]

Could help with ethereum/ethereumj#1025

[axic]

It is tracked here for Pantheon: https://pegasys1.atlassian.net/browse/PAN-2484

@ajsutton @MadelineMurray @rain-on @shemnon it would be interesting to have this one finished up for the potential to use high performance precompiles via EVMC (see #259). Would be interested to discuss?

[ajsutton]

It's looking increasingly likely that at least some of the crypto-heavy precompiles will wind up centralised on a single implementation for performance reasons which would make something like this a requirement.

To be honest I can't see the PegaSys team finding time time to work on this in the near future - I'd like to it's just there's a huge number of competing things a new client like Pantheon needs to work on.

[axic]

I understand, thanks for the response. Still hoping some time in the future it will be picked up 😉

[axic]

Apparently here's an (slightly outdated) implementation: https://github.com/semuxproject/evmc-jni

[jrhea]

@axic i am pretty close to having this done. see pr #455

[axic]

Found this implementation too: https://github.com/semuxgo/evmc-jni