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@Earlz Earlz released this Jun 28, 2017

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, but with support for Ethereum Virtual Machine based smart contracts. It achieves this through the revolutionary Account Abstraction Layer. For more general information about Qtum as well as links to join our community, go to

Welcome to Qtum Sparknet, the first public testnet for the Qtum blockchain. Sparknet is designed primarily for developers, and as such documentation at this point will be technical and suited more for developers. The mainnet is expected to be released in September and will be suited for the general public. Testnet tokens do not hold any value and should not be traded for any monetary instruments. The testnet can be reset or forked at anytime as deemed necessary for development. Sparknet does not include support for Mutualized Proof Of Stake, or for the Decentralized Governance Protocol. Both of these features are implemented, and their code is available on alternative branches (check the pull requests), but have not been tested and proven stable enough to include in this testnet. They will be implemented in the 2nd public testnet for Qtum.

For more technical information for how to start developing with Qtum Sparknet, please read the Sparknet Guide


Build on Ubuntu

This is a quick start script for compiling Qtum 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

git clone
cd qtum
# Update cpp-ethereum submodule
git submodule update --init --recursive 

# Note autogen will prompt to install some more dependencies if needed
make -j2

Build on OSX

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


Install the OS X command line tools:

xcode-select --install

When the popup appears, click Install.

Then install Homebrew.


brew install cmake automake berkeley-db4 libtool boost --c++11 miniupnpc openssl pkg-config protobuf qt libevent

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

Build Qtum Core

  1. Clone the qtum source code and cd into qtum

     git clone --recursive
     cd qtum
     git submodule update --init --recursive
  2. Build qtum-core:

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

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

  3. It is recommended to build and run the unit tests:

    make check


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

2Gb of RAM is recommended for building Qtum. If you encounter internal compiler errors or out of memory errors in autogen, then you can modify the last line of autogen to be something like:

make -j1

This will disable multicore building of some cpp-ethereum dependencies

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