OpenEthereum

Fast and feature-rich multi-network Ethereum client.

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Table of Contents

1. Description
2. Technical Overview
3. Building
   3.1 Building Dependencies
   3.2 Building from Source Code
   3.3 Starting OpenEthereum
4. Testing
5. Documentation
6. Toolchain
7. Contributing
8. License

1. Description

Built for mission-critical use: Miners, service providers, and exchanges need fast synchronisation and maximum uptime. OpenEthereum provides the core infrastructure essential for speedy and reliable services.

• Clean, modular codebase for easy customisation
• Advanced CLI-based client
• Minimal memory and storage footprint
• Synchronise in hours, not days with Warp Sync
• Modular for light integration into your service or product

2. Technical Overview

OpenEthereum's goal is to be the fastest, lightest, and most secure Ethereum client. We are developing OpenEthereum using the Rust programming language. OpenEthereum is licensed under the GPLv3 and can be used for all your Ethereum needs.

By default, OpenEthereum runs a JSON-RPC HTTP server on port :8545 and a Web-Sockets server on port :8546. This is fully configurable and supports a number of APIs.

If you run into problems while using OpenEthereum, check out the old wiki for documentation, feel free to file an issue in this repository, or hop on our Discord chat room to ask a question. We are glad to help!

You can download OpenEthereum's latest release at the releases page or follow the instructions below to build from source. Read the CHANGELOG.md for a list of all changes between different versions.

3. Building

3.1 Build Dependencies

OpenEthereum requires latest stable Rust version to build.

We recommend installing Rust through rustup. If you don't already have rustup, you can install it like this:

• Linux:

  $ curl https://sh.rustup.rs -sSf | sh

  OpenEthereum also requires clang (>= 9.0), clang++, pkg-config, file, make, and cmake packages to be installed.

• OSX:

  $ curl https://sh.rustup.rs -sSf | sh

  clang is required. It comes with Xcode command line tools or can be installed with homebrew.

• Windows: Make sure you have Visual Studio 2015 with C++ support installed. Next, download and run the rustup installer from https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-msvc/rustup-init.exe, start "VS2015 x64 Native Tools Command Prompt", and use the following command to install and set up the msvc toolchain:

  $ rustup default stable-x86_64-pc-windows-msvc

Once you have rustup installed, then you need to install:

• Perl
• Yasm

Make sure that these binaries are in your PATH. After that, you should be able to build OpenEthereum from source.

2.2 Build from Source Code

It was tested to work with Rust 1.47.0 (some other versions of Rust cause OpenEthereum crash!)

# download OpenEthereum code
$ git clone https://github.com/openethereum/openethereum
$ cd openethereum

# build in release mode
$ cargo build --release --features final

This produces an executable in the ./target/release subdirectory.

Note: if cargo fails to parse manifest try:

$ ~/.cargo/bin/cargo build --release

Note, when compiling a crate and you receive errors, it's in most cases your outdated version of Rust, or some of your crates have to be recompiled. Cleaning the repository will most likely solve the issue if you are on the latest stable version of Rust, try:

$ cargo clean

This always compiles the latest nightly builds. If you want to build stable, do a

$ git checkout stable

3.3 Starting OpenEthereum

Manually

To start OpenEthereum manually, just run

$ ./target/release/openethereum

so OpenEthereum begins syncing the Ethereum blockchain.

Using systemd service file

To start OpenEthereum as a regular user using systemd init:

1. Copy ./scripts/openethereum.service to your systemd user directory (usually ~/.config/systemd/user).
2. Copy release to bin folder, write sudo install ./target/release/openethereum /usr/bin/openethereum
3. To configure OpenEthereum, see our wiki for details.

4. Testing

Download the required test files: git submodule update --init --recursive. You can run tests with the following commands:

• All packages

  cargo test --all
  

• Specific package

  cargo test --package <spec>
  

Replace <spec> with one of the packages from the package list (e.g. cargo test --package evmbin).

You can show your logs in the test output by passing --nocapture (i.e. cargo test --package evmbin -- --nocapture)

5. Documentation

Be sure to check out our wiki for more information.

Viewing documentation for OpenEthereum packages

You can generate documentation for OpenEthereum Rust packages that automatically opens in your web browser using rustdoc with Cargo (of the The Rustdoc Book), by running the the following commands:

• All packages

  cargo doc --document-private-items --open
  

• Specific package

  cargo doc --package <spec> -- --document-private-items --open
  

Use--document-private-items to also view private documentation and --no-deps to exclude building documentation for dependencies.

Replacing <spec> with one of the following from the details section below (i.e. cargo doc --package openethereum --open):

Package List

• OpenEthereum Client Application

  openethereum

• OpenEthereum Account Management, Key Management Tool, and Keys Generator

  ethcore-accounts, ethkey-cli, ethstore, ethstore-cli

• OpenEthereum Chain Specification

  chainspec

• OpenEthereum CLI Signer Tool & RPC Client

  cli-signer parity-rpc-client

• OpenEthereum Ethash & ProgPoW Implementations

  ethash

• EthCore Library

  ethcore

  • OpenEthereum Blockchain Database, Test Generator, Configuration, Caching, Importing Blocks, and Block Information

    ethcore-blockchain

  • OpenEthereum Contract Calls and Blockchain Service & Registry Information

    ethcore-call-contract

  • OpenEthereum Database Access & Utilities, Database Cache Manager

    ethcore-db

  • OpenEthereum Virtual Machine (EVM) Rust Implementation

    evm

  • OpenEthereum Light Client Implementation

    ethcore-light

  • Smart Contract based Node Filter, Manage Permissions of Network Connections

    node-filter

  • OpenEthereum Client & Network Service Creation & Registration with the I/O Subsystem

    ethcore-service

  • OpenEthereum Blockchain Synchronization

    ethcore-sync

  • OpenEthereum Common Types

    common-types

  • OpenEthereum Virtual Machines (VM) Support Library

    vm

  • OpenEthereum WASM Interpreter

    wasm

  • OpenEthereum WASM Test Runner

    pwasm-run-test

  • OpenEthereum EVM Implementation

    evmbin

  • OpenEthereum JSON Deserialization

    ethjson

  • OpenEthereum State Machine Generalization for Consensus Engines

    parity-machine

• OpenEthereum Miner Interface

  ethcore-miner parity-local-store price-info ethcore-stratum using_queue

• OpenEthereum Logger Implementation

  ethcore-logger

• OpenEthereum JSON-RPC Servers

  parity-rpc

• OpenEthereum Updater Service

  parity-updater parity-hash-fetch

• OpenEthereum Core Libraries (util)

  accounts-bloom blooms-db dir eip-712 fake-fetch fastmap fetch ethcore-io
  journaldb keccak-hasher len-caching-lock memory-cache memzero
  migration-rocksdb ethcore-network ethcore-network-devp2p panic_hook
  patricia-trie-ethereum registrar rlp_compress stats
  time-utils triehash-ethereum unexpected parity-version

6. Toolchain

In addition to the OpenEthereum client, there are additional tools in this repository available:

• evmbin - OpenEthereum EVM Implementation.
• ethstore - OpenEthereum Key Management.
• ethkey - OpenEthereum Keys Generator.

The following tools are available in a separate repository:

• ethabi - OpenEthereum Encoding of Function Calls. Docs here
• whisper - OpenEthereum Whisper-v2 PoC Implementation.

7. Contributing

An introduction has been provided in the "So You Want to be a Core Developer" presentation slides by Hernando Castano. Additional guidelines are provided in CONTRIBUTING.

Contributor Code of Conduct

CODE_OF_CONDUCT

8. License

LICENSE