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Features

• Masternodes
• Segwit
• Variable Masternode Payments
• Lyra2re2
• Pure PoW

Coin Specifications

Specification	Value
Total Blocks	5,700,000
Block Size	4MB
Block Time	60s
PoW Reward	10 EXVO
Masternode Requirement	7,500 EXVO
Masternode Reward	Variable
Port	8585
RPC Port	8586
Masternode Port	8585

Build Exvo wallet

Building for 64-bit Windows

The first step is to install the mingw-w64 cross-compilation tool chain. Due to different Ubuntu packages for each distribution and problems with the Xenial packages the steps for each are different.

Common steps to install mingw32 cross compiler tool chain:

sudo apt install g++-mingw-w64-x86-64

Ubuntu Xenial 16.04 and Windows Subsystem for Linux

sudo apt install software-properties-common
sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu zesty universe"
sudo apt update
sudo apt upgrade
sudo update-alternatives --config x86_64-w64-mingw32-g++ # Set the default mingw32 g++ compiler option to posix.

Once the tool chain is installed the build steps are common:

Note that for WSL the Exvo source path MUST be somewhere in the default mount file system, for example /usr/src/exvo, AND not under /mnt/d/. If this is not the case the dependency autoconf scripts will fail. This means you cannot use a directory that located directly on the host Windows file system to perform the build.

The next three steps are an example of how to acquire the source in an appropriate way.

cd /usr/src
git clone https://github.com/ExvoProject/Exvo.git --recursive
sudo chmod -R a+rw exvo

Once the source code is ready the build steps are below.

PATH=$(echo "$PATH" | sed -e 's/:\/mnt.*//g') # strip out problematic Windows %PATH% imported var
cd depends
make HOST=x86_64-w64-mingw32 -j$(nproc)
cd ..
./autogen.sh # not required when building from tarball
CONFIG_SITE=$PWD/depends/x86_64-w64-mingw32/share/config.site
./configure --prefix=`pwd`/depends/x86_64-w64-mingw32 --disable-tests
make HOST=x86_64-w64-mingw32 -j$(nproc)

Build 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 https://github.com/ExvoProject/Exvo

cd exvo

# Note autogen will prompt to install some more dependencies if needed
./autogen.sh
./configure --disable-tests
make -j$(nproc)

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 leveldb libtool boost --c++11 --without-single --without-static miniupnpc openssl pkg-config protobuf qt5 libevent imagemagick --with-librsvg

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

Build Exvo

1. Clone the Exvo source code and cd into Exvo

    git clone --recursive https://github.com/ExvoProject/Exvo
    cd Exvo
   

2. Build Exvo:

   Configure and build the headless Exvo 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 --disable-tests
   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/Exvod and src/Exvo-cli, or you can run the Qt GUI using src/qt/Exvo-qt

Setup and Build: Arch Linux

This example lists the steps necessary to setup and build a command line only, non-wallet distribution of the latest changes on Arch Linux:

pacman -S git base-devel boost libevent python
git clone https://github.com/ExvoProject/Exvo
cd Exvo/
./autogen.sh
./configure --without-miniupnpc --disable-tests
make -j$(nproc)

Note: Enabling wallet support requires either compiling against a Berkeley DB newer than 4.8 (package db) using --with-incompatible-bdb, or building and depending on a local version of Berkeley DB 4.8. The readily available Arch Linux packages are currently built using --with-incompatible-bdb according to the As mentioned above, when maintaining portability of the wallet between the standard Bitcoin Core distributions and independently built node software is desired, Berkeley DB 4.8 must be used.

ARM Cross-compilation

These steps can be performed on, for example, an Ubuntu VM. The depends system will also work on other Linux distributions, however the commands for installing the toolchain will be different.

Make sure you install the build requirements mentioned above. Then, install the toolchain and curl:

sudo apt-get install g++-arm-linux-gnueabihf curl

To build executables for ARM:

cd depends
make HOST=arm-linux-gnueabihf NO_QT=1
cd ..
./configure --prefix=$PWD/depends/arm-linux-gnueabihf --enable-glibc-back-compat --enable-reduce-exports LDFLAGS=-static-libstdc++
make -j$(nproc)

For further documentation on the depends system see README.md in the depends directory.

Building on FreeBSD

Clang is installed by default as cc compiler, this makes it easier to get started than on OpenBSD. Installing dependencies:

pkg install autoconf automake libtool pkgconf
pkg install boost-libs openssl libevent
pkg install gmake

You need to use GNU make (gmake) instead of make. (libressl instead of openssl will also work)

For the wallet (optional):

./contrib/install_db4.sh `pwd`
setenv BDB_PREFIX $PWD/db4

Then build using:

./autogen.sh
./configure BDB_CFLAGS="-I${BDB_PREFIX}/include" BDB_LIBS="-L${BDB_PREFIX}/lib -ldb_cxx"
gmake

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 Exvo.

The contribution workflow is described in CONTRIBUTING.md.

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 of the RPC interface, written in Python, that are run automatically on the build server. These tests can be run (if the test dependencies are installed) with: qa/pull-tester/rpc-tests.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.