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README.md

What is Mchain?

Mchain is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Mchain's Bitcoin-like UTXO blockchain. For more general information about Mchain as well as links to join our community, go to https://mchain.network

Welcome to the Mchain Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. If you are testing the network, or developing unstable software on Mchain, we highly recommend using either testnet or regtest mode.

The major features of the Mchain network include:

  1. Compatibility with the Ethereum Virtual Machine, which allows for compatibility with most existing Solidity based smart contracts. No special solidity compiler is required to deploy your smart contract to Mchain.
  2. A Proof of Stake consensus system which is optimized for Mchain's contract model. Any user can stake and help to secure the network. There is no voting, master nodes, or minimum amount required.
  3. The Decentralized Governance Protocol is completely implemented and functional, which allows certain network parameters to be modified without a fork or other network disruption. This currently controls parameters like block size, gas prices, etc.
  4. Uses the UTXO transaction model and is compatible with Bitcoin, allowing for existing tooling and workflows to be used with Mchain. This allows for the infamous SPV protocol to be used which is ideal for light wallets on mobile phones and IoT devices.

Note: Mchain Core is considered beta software. We make no warranties or guarantees of its security or stability.

Mchain Documentation and Usage Resources

These are some resources that might be helpful in understanding Mchain. Note that the unofficial documents are not created by the Mchain team.

Basic usage resources:

General Info about Mchain:

What is Mchain Core?

Mchain Core is our primary mainnet wallet. It implements a full node and is capable of storing, validating, and distributing all history of the Mchain network. Mchain Core is considered the reference implementation for the Mchain network.

Mchain Core currently implements the following:

  • Sending/Receiving Mchain
  • Sending/Receiving ERC20 tokens on the Mchain network
  • Staking and creating blocks for the Mchain network
  • Creating and interacting with smart contracts
  • Running a full node for distributing the blockchain to other users
  • "Prune" mode, which minimizes disk usage
  • Regtest mode, which enables developers to very quickly build their own private Mchain network for Dapp testing
  • Compatibility with the Bitcoin Core set of RPC commands and APIs

Building Mchain Core

Build on Ubuntu

This is a quick start script for compiling Mchain on  Ubuntu


sudo apt-get install build-essential libtool autotools-dev automake pkg-config libssl-dev libevent-dev bsdmainutils git cmake libboost-all-dev
sudo apt-get install software-properties-common
sudo add-apt-repository ppa:bitcoin/bitcoin
sudo apt-get update
sudo apt-get install libdb4.8-dev libdb4.8++-dev

# If you want to build the Qt GUI:
sudo apt-get install libqt5gui5 libqt5core5a libqt5dbus5 qttools5-dev qttools5-dev-tools libprotobuf-dev protobuf-compiler qrencode

git clone https://github.com/mchainnetwork/mchain --recursive
cd mchain

# Note autogen will prompt to install some more dependencies if needed
./autogen.sh
./configure 
make -j2

Build on CentOS

Here is a brief description for compiling Mchain on CentOS, for more details please refer to the specific document

# Compiling boost manually
sudo yum install python-devel bzip2-devel
git clone https://github.com/boostorg/boost.git
cd boost
git checkout boost-1.66.0
git submodule update --init --recursive
./bootstrap.sh --prefix=/usr --libdir=/usr/lib64
./b2 headers
sudo ./b2 -j4 install

# Installing Dependencies for Mchain
sudo yum install epel-release
sudo yum install libtool libdb4-cxx-devel openssl-devel libevent-devel

# If you want to build the Qt GUI:
sudo yum install qt5-qttools-devel protobuf-devel qrencode-devel

# Building Mchain
git clone --recursive https://github.com/mchainnetwork/mchain.git
cd mchain
./autogen.sh
./configure
make -j4

Build on OSX

The commands in this guide should be executed in a Terminal application. The built-in one is located in /Applications/Utilities/Terminal.app.

Preparation

Install the OS X command line tools:

xcode-select --install

When the popup appears, click Install.

Then install Homebrew.

Dependencies

brew install cmake automake berkeley-db4 libtool boost --c++11 --without-single --without-static miniupnpc openssl pkg-config protobuf qt5 libevent imagemagick --with-librsvg qrencode

NOTE: Building with Qt4 is still supported, however, could result in a broken UI. Building with Qt5 is recommended.

Build Mchain Core

  1. Clone the mchain source code and cd into mchain

     git clone --recursive https://github.com/mchainnetwork/mchain.git
     cd mchain
    
  2. Build mchain-core:

    Configure and build the headless mchain binaries as well as the GUI (if Qt is found).

    You can disable the GUI build by passing --without-gui to configure.

    ./autogen.sh
    ./configure
    make
    
  3. It is recommended to build and run the unit tests:

    make check
    

Run

Then you can either run the command-line daemon using src/mchaind and src/mchain-cli, or you can run the Qt GUI using src/qt/mchain-qt

For in-depth description of Sparknet and how to use Mchain for interacting with contracts, please see sparknet-guide.

License

Mchain is GPLv3 licensed.

Development Process

The master branch is regularly built and tested, but is not guaranteed to be completely stable. Tags are created regularly to indicate new official, stable release versions of Mchain.

The contribution workflow is described in CONTRIBUTING.md.

Developer IRC can be found on Freenode at #mchain-dev.

Testing

Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.

Automated Testing

Developers are strongly encouraged to write unit tests for new code, and to submit new unit tests for old code. Unit tests can be compiled and run (assuming they weren't disabled in configure) with: make check. Further details on running and extending unit tests can be found in /src/test/README.md.

There are also regression and integration tests, written in Python, that are run automatically on the build server. These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py

Manual Quality Assurance (QA) Testing

Changes should be tested by somebody other than the developer who wrote the code. This is especially important for large or high-risk changes. It is useful to add a test plan to the pull request description if testing the changes is not straightforward.

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