EVMC – Ethereum Client-VM Connector API https://evmc.ethereum.org

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README.md

EVMC

Ethereum Client-VM Connector API

The EVMC is the low-level ABI between Ethereum Virtual Machines (EVMs) and Ethereum Clients. On the EVM side it supports classic EVM1 and ewasm. On the Client-side it defines the interface for EVM implementations to access Ethereum environment and state.

Usage

Documentation

Please visit the documentation.

Languages support

Language	Supported Versions	Supported Compilers	Feature Support
C	C99, C11	GCC 6+, clang 3.8+, MSVC 2015+	Host- and VM-side
C++	C++11, C++14, C++17	GCC 6+, clang 3.8+, MSVC 2015+	Host- and VM-side
Go (bindings)	1.9 - 1.12		Host-side only
Rust (bindings)¹	2018 edition	1.37.0 and newer	VM-side only
Java (bindings)	11		Host-side only

1. Rust support is limited and not complete yet, but it is mostly functional already. Breaking changes are possible at this stage.

Testing tools

evmc run (tools/evmc) — executes bytecode in any EVMC-compatible VM implementation.
evmc-vmtester (tools/vmtester) — can test any EVM implementation for compatibility with EVMC.
evm-test (evmone → test/unittests) — allows running the collection of evmone's unit tests on any EVMC-compatible EVM implementation.
evmone-fuzzer (evmone → test/fuzzer) — differential fuzzer for EVMC-compatible EVM implementations.

EVMs

aleth-interpreter
evmjit
evmone
Hera
Hera.rs
Daytona
eip1962-evmc (EIP-2003 style precompile)

Clients

aleth
nim-evmc
go-ethereum (in progress)
pyevm (in progress)
pyethereum (abandoned)
Solidity (for integration testing)

Maintainers

Alex Beregszaszi @axic
Paweł Bylica @chfast

Contributing

Talk with us on the EVMC Gitter chat.

License

Licensed under the MIT License.

Internal

Making new release

Update CHANGELOG.md, put the release date, update release link.
git add CHANGELOG.md.
Tag new release: bumpversion --allow-dirty prerel.
Prepare CHANGELOG for next release: add unreleased section and link.
git add CHANGELOG.md.
Start new release series: bumpversion --allow-dirty --no-tag minor.