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Building Komodo from source

For OSx instructions: see Installing Komodo on OSX

For Windows instructions: see Installing Komodo on Windows 64-bit systems

Currently, you will need:

  • Linux (easiest with a Debian-based distribution)

  • For Ubuntu, we recommend using only the 16.04 or 18.04 releases

  • 64-bit

  • Minimum 4GB of free RAM (8GB+ recommended)

Log in as the user to your system, and issue these commands to make sure your Linux machine is up to date.

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

sudo apt-get install build-essential pkg-config libc6-dev m4 g++-multilib autoconf libtool libncurses-dev unzip git python zlib1g-dev wget bsdmainutils automake libboost-all-dev libssl-dev libprotobuf-dev protobuf-compiler libqrencode-dev libdb++-dev ntp ntpdate nano software-properties-common curl libevent-dev libcurl4-gnutls-dev cmake clang libsodium-dev -y

This takes some time depending your internet connection. Let it run in the background. Now it is time to install Komodo. Follow each line step by step and ignore the "libgmp headers missing" at some point!

cd ~
git clone https://github.com/jl777/komodo
cd komodo
git checkout dev

-j8 uses 8 threads - replace 8 with number of threads you want to use or use the nproc variable to use all threads.

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

This can take some time.

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

Add the following lines to the komodo.conf file (replace rpcuser and rpcpassword with your own)

  • Press CTRL+O to save the changes.

  • Press CTRL+X to exit nano editor.

Now you can start komodod daemon to sync with the network

cd ~
cd komodo/src
./komodod &

You might see some outputs in terminal where you started the komodod daemon. So, open a new tab or new terminal window and go to Komodo data directory to see updated logs of Komodo:

tail -f ~/.komodo/debug.log

After tail command it will start showing logs update to you as it syncs with the network. If you want to terminate this command just press CTRL+C.

In another terminal window you can go to Komodo source directory and use komodo-cli command to check the latest update info. like:

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

This will show you latest info of blockchain and wallet like this:

  "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": ""

in this output when you see "blocks" and "longestchain" values showing same, your wallet is in full sync.

If you already have installed Komodo from it's source code on your machine, and need to update to the latest version, follow the below steps.

Please follow each step carefully and don't skip to the next one until the previous step is successfully completed. If you have the komodo daemon running, you can leave it running while updating if you have enough resources in your machine. If you prefer to stop it before updating, please use ~/komodo/src/komodo-cli stop to stop the daemon and proceed with the following steps to update.

  1. Navigate to your komodo directory
cd ~/komodo
  1. Make sure you don't have any changes made to the source and reset it. This will ensure clean source and shouldn't create issues while pulling the latest source in the next step.
git reset --hard
  1. Clean the source directory
make clean
  1. Update the source. (If you have any changes made to the source code, this command may not pull the latest source. Please make sure you have followed the previous steps)
git pull
  1. Compile the latest binary
./zcutil/build.sh -j$(nproc)

Start your sevices as usual. If you didn't stop the deamon before compiling, please stop it using ~/komodo/src/komodo-cli stop and start again.

If you are in a hurry, most of the time the below steps can be used to update the daemon and it takes lesser amount of time to compile. But it is a good practice to follow the steps outlined above to make sure the compilation process completes without an error.

cd ~/komodo
git checkout dev
git pull
make -j$(nproc)

We can not stress enough to take a backup of your wallet.dat file time to time. Here's the reason why:

  • When you send some funds from an address, sometimes the funds used from the unspent transaction outputs (utxo) leaves a change behind. This change doesn't go back to the same address the funds sent from. This change goes to a new address. And this new address is stored in the wallet.dat file located in Komodo data directory on your machine.

  • Sometimes your wallet.dat file may got corrupted. It's always good to have backup handy.

If you are not sure when to take backup of your wallet.dat file, just take backup of it according to how often your use. If you use it regularly, then just take a backup of your wallet.dat file at then end of day. If not so often then maybe twice a week or depending on your use adjust your time period of taking backup.

You can find your wallet.dat file under linux at ~/.komodo/wallet.dat.

To backup you can take a copy of this file and make archive of it.

# To copy
cp -av ~/.komodo/wallet.dat ~/wallet.dat

# To rename file
mv ~/wallet.dat ~/wallet_backup_DATE_HERE.dat

# example
mv ~/wallet.dat ~/wallet_backup_21May2017.dat

# To make archive
tar -czvf ~/wallet_backup_21May2017.dat.tgz ~/wallet_backup_21May2017.dat

Ensure commandline tools from apple/xcode are installed. Issue the following command in a terminal.

xcode-select --install

brew is needed to install dependencies. If you have latest brew installed in your system already, skip this and install the deps directly.

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

These are the dependencies needed to install with brew.

brew update
brew upgrade
brew tap discoteq/discoteq; brew install flock
brew install autoconf autogen automake
brew install gcc@6
brew install binutils
brew install protobuf
brew install coreutils
brew install wget

git clone https://github.com/jl777/komodo

cd komodo

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

This can take some time, so let's create a configuration file in the mean time using a fresh terminal.

The configuration file should be created in the following directory:

~/Library/Application\ Support/Komodo

Create the directory if it's missing:

mkdir ~/Library/Application\ Support/Komodo

and create the configuration file by entering this in terminal:

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=" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "rpcbind=" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=" >> ~/Library/Application\ Support/Komodo/komodo.conf
echo "addnode=" >> ~/Library/Application\ Support/Komodo/komodo.conf

If the build went well, run komodo:

cd ~/komodo/src
./komodod &

To track progress of downloading the Komodo blockchain:

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

or get info with the getinfo command:

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

PLEASE FOLLOW THE VIDEO TUTORIAL: https://www.youtube.com/watch?v=gfZZy8b222E

  1. First download komodo windows binaries and place the files in a new folder on the Desktop called kmd ('C:\\Users\\YourUserName\\Desktop\\kmd') .

Open a Command Prompt for the following steps.

  1. Next we'll create the Komodo directory in the AppData directory.
mkdir "%HOMEPATH%\AppData\Roaming\komodo"
  1. Next we will create our komodo.conf file.
notepad “%HOMEPATH%\AppData\Roaming\Komodo\komodo.conf”

When Notepad opens, click Yes to create the komodo.conf file. Copy the information below and paste it into Notepad.


After pasting, save and exit Notepad.

  1. Create the directory for ZcashParams:
mkdir “%HOMEPATH%\AppData\Roaming\ZcashParams”

And download following files in ZcashParams folder:

  1. Now we can run komodod.exe
  1. Komodod should start syncing. You can check progress by running
"%HOMEPATH%\Desktop\kmd\komodo-cli.exe" getinfo
  1. To stop komodod, run:
"%HOMEPATH%\Desktop\kmd\komodo-cli.exe" stop