Aleth support

[holiman]

It should be possible, and maybe even not very difficult, to add aleth to the list of fuzzed clients. They do support standard-json output, but unfortunately the don't export jsonl (line by line) output, but instead a huge blob of json. IIRC, we need to use testeth to run the statetest.
@chfast / or @gumbo , is this correct ?

[chfast]

If you are using tools like evm or parity-evm you can use aleth-vm similarly. If jsonl is needed I will add support for it.

[ireneGP]

Is the --flat something you are looking for? Like the following command:

➜  aleth-vm git:(master) ✗ ./aleth-vm trace --code 3A6597adEf2eBfEaFFAA6Aa3fA193ec528Af4b4f2d67ede3c770E5770fd246cC27b6bc7FdAF4Df6FD92B2d3B01788D8F51eb --flat
{"depth":"0","gas":"9223372036854775807","gasCost":"2","memory":[],"pc":"0","stack":[],"storage":{}}
{"depth":"0","gas":"9223372036854775805","gasCost":"3","pc":"1","stack":["0x00"]}
{"depth":"0","gas":"9223372036854775802","gasCost":"0","pc":"8","stack":["0x00","0x97adef2ebfea"]}

[holiman]

Ohh, nice! Yes that's it. However, fuzzing is nowadays based on running a statetest, not raw code. Does that exist?

[holiman]

So, this aleth-vm https://github.com/ethereum/aleth/blob/master/aleth-vm/main.cpp looks a lot like the geth evm, and looks like it will be easy to integrate into vm.py, and in general to use with things like the assembly compiler in evmlab. I haven't teste it, but looked at the source, some questions

• It does not seem to take a genesis, so it appears not possible to specify alloc section? That breaks a lot of usecases.
• It does not seem to have ability to, instead of taking gasPrice, sender, network etc via commandline, take all that from a statetest instead. That would enable fuzzing.

Could we get that, @chfast ?