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Evm laboratory

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# Go evmlab

This project is inspired by [EVMlab](https://github.com/ethereum/evmlab), which was
written in Python. EVMlab featured a minimal "compiler", along with some tooling
to view traces in a UI, and execute scripts against EVMs (parity and geth).

This is a golang rewrite from scratch of that same project, this time in go-lang to be more stable 
and nice to use.

## Status

So far, it only contains

- a minimal "compiler", which is _not_ a proper compiler, but it can be used to create EVM bytecode and do some basic higher level operations. 
- Some infrastructure for writing EVM-based fuzzers

## Examples

See [examples/calltree](the calltree example) to get an idea of how to use this
thing, along with an [analysis](examples/calltree/README.md) done using 
this framework.

# Utilities

There are a few different utilities in this repo, based on this library.

## Tracediff

Tracediff allows you to load evm (jsonl) files and find differences.

![tracediff](https://raw.githubusercontent.com/holiman/goevmlab/master/docs/tracediff.png)
![tracediff](https://raw.githubusercontent.com/holiman/goevmlab/master/docs/tracediff2.png)

## Traceview

Traceview allows you to analyse an evm trace file

![traceview](https://raw.githubusercontent.com/holiman/goevmlab/master/docs/traceview.png)

## Trophy list

Bugs found via the fuzzer or via tests generated using go-evmlab in general

- Nethermind erroneous gas in BLS-multiexp: https://github.com/NethermindEth/nethermind/issues/2208
- Geth error calculating BLS gas: https://github.com/ethereum/go-ethereum/pull/21253
- Besu error on EIP-2929 [bug](https://github.com/holiman/goevmlab/issues/24) and [fix](https://github.com/hyperledger/besu/pull/1468)

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