Implement a JNI binding for EVMC

[axic]

EVMC is a thin API to write VMs for and to be used in clients for connecting to VMs.

cpp-ethereum supports it natively to use evmjit and pyethereum/go-ethereum had prototype implementations. More importantly, the upcoming ewasm VM called Hera also uses this interface.

Supporting it in ethereumj/Harmony would allow a quick way for ethereumj to be part of the ewasm testnet without the need of writing a native Java interpereter for Webassembly.

See also ethereum/evmc#137.

[cryptokat]

Just a reminder there's a typo in the title EMV-C => EVM-C

[axic]

Updated, also the repo link, since we've split it out into https://github.com/ethereum/evmc

[kishansagathiya]

@zilm13 @mkalinin
Planning to pick this. Any tips? How big would this be?

[mkalinin]

@kishansagathiya do you have an experience in JNI binding development?

[kishansagathiya]

@mkalinin Nope. But I can read up stuff(I was few hours back) and try it. Does it seem too difficult to take up?

[mkalinin]

@kishansagathiya it's a bit tricky. I would advise you to continue with something else.

[axic]

There is some initial work started here: ethereum/evmc#171