# Installing Smart Chain Software From Source Code

The basic Komodo software package includes two applications.

# komodod

The komodod software application is the Smart Chain daemon that powers all Komodo blockchains.

# komodo-cli

The komodo-cli software application allows a developer to execute API calls to komodod via the command line.

# Both are Installed Automatically

Both of these software applications are installed in the ~/komodo/src/ directory as a part of any of the following installation procedures.

# The Two Methods to Install Smart Chain Software

There are two methods available to install Smart Chain software.

# Pre-compiled Binaries

You can download and unzip our pre-compiled binaries. This is the simplest method and requires no installation procedure.

For more information on this method, please see the link below.

Link to simple installations section for pre-compiled executables

# Building Smart Chain Software From Source

You may also build Smart Chain software from source.

This is not required, but building from source is considered the best practice in a production environment, as this allows you to instantly update to the latest patches and upgrades.

# Linux

# Requirements

Linux (easiest with a Debian-based distribution, such as Ubuntu)
- For Ubuntu, we recommend using only the 16.04 or 18.04 releases
64-bit Processor
Minimum 32GB HDD or SDD storage space
Minimum 4GB of free RAM (8GB+ recommended)

# Get Started

Verify that your system is up to date.

sudo apt-get update
sudo apt-get upgrade -y

# Install the dependency packages

sudo apt-get install build-essential pkg-config libc6-dev m4 g++-multilib autoconf libtool ncurses-dev unzip git python python-zmq zlib1g-dev wget curl bsdmainutils automake cmake clang ntp ntpdate nano -y

This action takes some time, depending on your Internet connection. Let the process run in the background.

Once completed, follow the steps below to install Komodo.

Note

At some point during the installation process, you may see a warning, "libgmp headers missing". This can safely be ignored.

# Clone the Komodo Repository

cd ~
git clone https://github.com/KomodoPlatform/komodo
cd komodo

# Fetch the Zcash Parameters

./zcutil/fetch-params.sh

# Build the Komodo Daemon

In the command below, the -j$(nproc) parameter instructs the script to utilize all available processors in your hardware.

Alternatively, you may instruct the script to use only a set number of processors. For example, -j8 instructs the script to use 8 processors, -j4 instructs the script to use 4 processors, etc.

./zcutil/build.sh -j$(nproc)

This script can take some time.

# Create the komodo.conf File

cd ~
mkdir .komodo
cd .komodo
nano komodo.conf

With the komodo.conf file open in the Nano text editor, add the following lines.

(Create your own rpcuser username and rpcpassword password.)

rpcuser=usernameChangeItToSomethingSecure
rpcpassword=passwordChangeItToSomethingSecure
txindex=1
bind=127.0.0.1
rpcbind=127.0.0.1
addnode=78.47.196.146
addnode=5.9.102.210
addnode=178.63.69.164
addnode=88.198.65.74
addnode=5.9.122.241
addnode=144.76.94.38

Press CTRL+O to save the changes.

Press CTRL+X to exit the Nano editor.

Start the komodod daemon. It will automatically begin syncing with the network.

cd ~
cd komodo/src
./komodod &

The & parameter in the last instruction above instructs the terminal to continue allowing you to enter commands within this terminal shell.

# (Optional) Tail the komodod Daemon

Enter the following command to "tail" the komodod daemon. The tail command allows you to view the debug.log file updates in real time.

tail -f ~/.komodo/debug.log

# Test Your Daemon with komodo-cli

Ensure that your current working directory is in the default src directory.

cd ~/komodo/src/

You may now use the komodo-cli software to send API (RPC) calls to the komodod daemon.

For example:

./komodo-cli getinfo

This command returns the latest state information about the KMD blockchain and your wallet.dat file.

{
  "version": 1000550,
  "protocolversion": 170002,
  "KMDversion": "0.1.0",
  "notarized": 186670,
  "notarizedhash": "000000308845da840ab9af6c1e09dc02f3118683df065b5ec00b05c9bd58cdae",
  "notarizedtxid": "6723a10ef4fceab230d4245305d1ed2a916e435abb83269c20daad9bbefd3f0e",
  "notarizedtxid_height": "mempool",
  "notarized_confirms": 0,
  "walletversion": 60000,
  "balance": 0,
  "interest": 0,
  "blocks": 186773,
  "longestchain": 308867,
  "timeoffset": 0,
  "tiptime": 1486411069,
  "connections": 8,
  "proxy": "",
  "difficulty": 1624278.6287953,
  "testnet": false,
  "keypoololdest": 1482746526,
  "keypoolsize": 101,
  "paytxfee": 0.0,
  "relayfee": 0.00001,
  "errors": ""
}

When the blocks and longestchain values are equal to each other, your machine is in sync with the network.

# Backup your wallet

We can not stress enough the importance of backing up your wallet.dat file.

On Linux, the file is located here: ~/.komodo/wallet.dat

One method to backup this file is to archive a copy of the file.

# Copy the file
cp -av ~/.komodo/wallet.dat ~/wallet.dat
# Rename file
mv ~/wallet.dat ~/2019-05-17-wallet_backup.dat
# To make archive
tar -czvf ~/2019-05-17-wallet_backup.dat.tgz ~/2019-05-17-wallet_backup.dat
# Move the final file to a secure location

# MacOS

# Requirements

OSX (version > 10.11)
Minimum 4GB of free RAM (8GB+ recommended)

# Ensure Command Line Tools are Installed.

Issue the following command in a terminal.

xcode-select --install

# Ensure brew is Installed

We use the software brew to install dependencies. If you have the latest version of brew installed already, you may skip this step.

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

# Use brew to Install Dependencies

Execute each command separately

brew update
brew upgrade
brew tap discoteq/discoteq; brew install flock
brew install autoconf autogen automake
brew install gcc@8
brew install binutils
brew install protobuf
brew install coreutils
brew install wget

# Clone the Komodo repository

git clone https://github.com/KomodoPlatform/komodo

# Fetch the Zcash Parameters:

cd komodo
./zcutil/fetch-params.sh

# Compile Komodo

git checkout dev
./zcutil/build-mac.sh -j8

This can take some time.

While this process proceeds, open a new terminal for the next step.

# Create Configuration File

Create the configuration file in the following directory:

~/Library/Application\ Support/Komodo

If the directory does not yet exist, create the directory.

mkdir ~/Library/Application\ Support/Komodo

Create the configuration file by entering the following commands in the terminal. Execute each line separately.

echo "rpcuser=komodouser" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "rpcpassword=`head -c 32 /dev/urandom | base64`" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "txindex=1" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "bind=127.0.0.1" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "rpcbind=127.0.0.1" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=5.9.102.210" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=78.47.196.146" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=178.63.69.164" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=88.198.65.74" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=5.9.122.241" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=144.76.94.38" >> ~/Library/Application\ Support/Komodo/komodo.conf

# Run Komodo

Once all processes are complete, run the komodod daemon.

cd ~/komodo/src
./komodod &

# Track the Syncing Progress

# Using the tail Command

tail -f ~/Library/Application\ Support/Komodo/debug.log

# Using komodo-cli and getinfo

cd ~/komodo/src
./komodo-cli getinfo

When the returned properties of blocks and longestchain are equal to each other, the daemon is finished syncing with the network.

# Backup Your Wallet

We can not stress enough the importance of backing up your wallet.dat file.

On MacOS, the file is located here: ~/Library/Application\ Support/Komodo/wallet.dat

One method to backup this file is to archive a copy of the file.

# Copy the file
cp -av ~/Library/Application\ Support/Komodo/wallet.dat ~/wallet.dat
# Rename file
mv ~/wallet.dat ~/2019-05-17-wallet_backup.dat
# To make archive
tar -czvf ~/2019-05-17-wallet_backup.dat.tgz ~/2019-05-17-wallet_backup.dat
# Move the final file to a secure location

# Windows

The Windows software for komodod and komodo-cli files are slightly different than their MacOS and Linux counterparts in two ways.

The Windows software cannot be directly compiled on a Windows machine. Rather, the software must be compiled on a Linux machine (Ubuntu recommended), and then transferred to the Windows machine
- You can use a Virtual Machine-based installation of Ubuntu Linux, running on a Windows machine, as a solution
The names of the software are komodod.exe and komodo-cli.exe

Once you have access to an Ubuntu machine and have access to a terminal with sudo privileges (opens new window), you are prepared to continue the installation process.

# Install dependencies

sudo apt-get install build-essential pkg-config libc6-dev m4 g++-multilib autoconf libtool ncurses-dev unzip git python python-zmq zlib1g-dev wget libcurl4-gnutls-dev bsdmainutils automake curl libsodium-dev cmake mingw-w64

# Install Rust

curl https://sh.rustup.rs -sSf | sh
source $HOME/.cargo/env
rustup target add x86_64-pc-windows-gnu

# Configure the compiler to use POSIX thread model

Execute:

sudo update-alternatives --config x86_64-w64-mingw32-gcc

After executing the above command, select the POSIX option.

  Selection    Path                                   Priority   Status
------------------------------------------------------------
  0            /usr/bin/x86_64-w64-mingw32-gcc-win32   60        auto mode
  1            /usr/bin/x86_64-w64-mingw32-gcc-posix   30        manual mode
* 2            /usr/bin/x86_64-w64-mingw32-gcc-win32   60        manual mode
Press <enter> to keep the current choice[*], or type selection number: 1

Execute:

sudo update-alternatives --config x86_64-w64-mingw32-g++

After executing the above command, select the POSIX option.

There are 2 choices for the alternative x86_64-w64-mingw32-g++ (providing /usr/bin/x86_64-w64-mingw32-g++).
  Selection    Path                                   Priority   Status
------------------------------------------------------------
  0            /usr/bin/x86_64-w64-mingw32-g++-win32   60        auto mode
  1            /usr/bin/x86_64-w64-mingw32-g++-posix   30        manual mode
* 2            /usr/bin/x86_64-w64-mingw32-g++-win32   60        manual mode
Press <enter> to keep the current choice[*], or type selection number: 1

# Clone the Komodo Repository

git clone https://github.com/KomodoPlatform/komodo
cd komodo

# Fetch the Zcash Parameters

./zcutil/fetch-params.sh

# Build the Komodo Daemon

In the command below, you may instruct the script to use only a set number of processors. For example, -j8 instructs the script to use 8 processors, -j4 instructs the script to use 4 processors, etc.

./zcutil/build-win.sh -j8

This script can take some time. Once completed, you will find komodod.exe & komodo-cli.exe files inside the src directory.

Transfer these 2 executable files to your Windows computer and place the files in a new folder on the Desktop called kmd or any other location you prefer (remember the location and use that). For this guide we are using kmd directory on Desktop.

Open a command prompt for the following steps.

# Create the Komodo Directory

mkdir "%HOMEPATH%\AppData\Roaming\komodo"

# Create the Configuration File

notepad "%HOMEPATH%\AppData\Roaming\Komodo\komodo.conf"

When the software dialogue box opens, click Yes to create the komodo.conf file.

Copy the information below and paste it into Notepad.

rpcuser=usernameChangeItToSomethingSecure
rpcpassword=passwordChangeItToSomethingSecure
daemon=1
rpcallowip=127.0.0.1
rpcbind=127.0.0.1
server=1
txindex=1
addnode=5.9.102.210
addnode=78.47.196.146
addnode=178.63.69.164
addnode=88.198.65.74
addnode=5.9.122.241
addnode=144.76.94.38

After pasting, save and exit Notepad.

# Create the Directory for the Zcash Parameters

mkdir “%HOMEPATH%\AppData\Roaming\ZcashParams”

Download following files and move them into the new directory.

# Run Smart Chain Software

"%HOMEPATH%\Desktop\kmd\komodod.exe"

# Verify Syncing Progress

"%HOMEPATH%\Desktop\kmd\komodo-cli.exe" getinfo

# Backup Your Wallet

We can not stress enough the importance of backing up your wallet.dat file.

On Windows, the file is located here: %HOMEPATH%\AppData\Roaming\Komodo\wallet.dat

One method to backup this file is to create a copy and archive it.

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