Installing an Ixian DLT Node on Linux (Fedora)

Prerequisites

Operating system: recent version of Fedora Linux
RAM: 16 GB
CPU: i3/i5/i7/Xeon or AMD equivalent with at least 2 GHz and at least 4 CPU threads
Free Disk Space: 600 GB, 1 TB Recommended
Internet Connection Speed: 20 Mbps symmetrical or higher, 100 Mbps recommended

Additional requirements

Ability to forward a port from the public internet to the machine running the DLT Node. (Default port is TCP 10234.)
A minimum of 2000 IXI is required to operate an Ixian DLT master node.

Install required software

Install the dotnet 6.0 SDK following the guide for your Linux distribution here: DotNet Installation Guide.
Install additional required packages:
```
dnf install gcc git make unzip
```
Prepare a directory for the Ixian Project:
```
mkdir ~/Ixian
cd ~/Ixian
```

Acquire the latest Ixian sources from github. Two repositories are required to build a DLT Master node:

git clone -b master https://github.com/ProjectIxian/Ixian-Core.git
git clone -b master https://github.com/ProjectIxian/Ixian-DLT.git

The directory structure should look like this:

.
..
Ixian-Core
Ixian-DLT

Switch into the Ixian-DLT directory and execute rebuild.sh script:
```
cd Ixian-DLT
sh rebuild.sh
```
The script will build all necessary files, which will be located in ‘~/Ixian/Ixian-DLT/IxianDLT/bin/Release/net6.0/’
Ixian DLT Node requires the Argon2 library to function. In order to build one for your system, follow these steps: ..a. Obtain the Argon2 source code from github:
```
cd ~/Ixian
git clone https://github.com/P-H-C/phc-winner-argon2.git
```
..b. Compile the Argon2 source:
```
cd phc-winner-argon2
make
```
..c. Copy the resulting Argon2 library to the IxianDLT folder. Please note that the file should be renamed to ‘libargon2.so’:
```
cp libargon2.so.1 ~/Ixian/Ixian-DLT/IxianDLT/bin/Release/net6.0/libargon2.so
```

Switch to the Ixian binaries folder:

cd ~/Ixian/Ixian-DLT/IxianDLT/bin/Release/net6.0/

(Optional) Download and unpack the bootstrap data files to enable faster synchronization.

Follow the Data Bootstrap guide to download and install the latest data files.

The Ixian DLT node is now ready to start.

Running the software

Switch to the Ixian DLT binaries folder and issue the command to start the Ixian DLT software:

./IxianDLT

If you’re on a console-only environment with no GUI, issue this command instead:

./IxianDLT --disableWebStart

Alternatively you can also start the Ixian DLT with this command:

dotnet IxianDLT.dll --disableWebStart

The output should look like this:

Ixian Console Output

Creating a wallet

If this is the first time that you’re starting Ixian DLT, a new wallet will be generated for you. You have to set your new wallet’s password to proceed. This password will be used to encrypt the ixian.wal wallet file and will be required every time you start the Ixian DLT node.

It is recommended to periodically copy the wallet to a safe location, preferably on an offline media (USB Key), or a different machine. The file is encrypted using AES256. The wallet file is called ixian.wal.

Verifying the status of the DLT Node

While the node is running, it will display a logo and some basic information in the command window. Please do not close this window, as closing it will cause the DLT Node to shut down.

Ixian Run Information

When the Ixian DLT Node first starts, the status text will display synchronizing while the software is retrieving the required information from the DLT network. When this process has been completed, the status text will change to active.

If the DLT Node is shut down and later restarted, it will have to synchronize again, but since most of the data will already be stored on the local disk, the synchronization phase will be much shorter.

Using your Ixian wallet

In order to interact with the running DLT Node and use the built-in wallet software, open a web browser and navigate to http://localhost:8081.

If you have configured a different API Port, then change the port number in the link like so: http://localhost:PORT_NUMBER.

The Ixian built-in Wallet looks like this:

Ixian Built-In Wallet

Changing the settings

Ixian DLT Node settings are provided on the command line when starting the IxianDLT executable. The most important parameters are:

-p DLT Port: If you are for some reason unable to port-forward the default port, 10234, you may use a different port. The -p switch will change which port the software uses for DLT communication.
-i External IP address: The IxianDLT software will use UPnP to try and determine the external IP address of your node. If this fails for some reason, you can specify the external address using the -i option.
-a API Port: This changes the port on which the node accepts API commands, as well as the port on which the built-in wallet operates. If you provide a different API port, then the built-in wallet for the node will be at http://localhost:API_PORT.
–threads: Tells the DLT Node how many threads to create for the internal Ixian Miner. Default is 2. Use --disableMiner to prevent the DLT Node from mining IXI Coins.
–disableMiner: Tells the DLT Node not to start the built-in Ixian Miner.
–help: Displays a short help with some other, less frequently used command options.

If you need to run the DLT Node with different settings, it can be tedious to type them out every time you wish to start the software. It is recommended to create a shell script (.sh) with the options already set. To do this, follow the guide below:

Switch to the unpacked Ixian DLT folder. If you have followed the above instructions for building, the command should be cd ~/Ixian/Ixian-DLT/IxianDLT/bin/Release.
Create a new script using your preferred text editor. This example uses vi: vi StartIxian.sh.
Press i to switch the VI editor into ‘input mode’.
Type or paste the IxianDLT command into the file. You may use the command below, which includes the most common options, as the starting point. ./IxianDLT -p 10234 -a 8081 --threads 2
Press Escape to exit the input mode, then type :wq to save the file and quit the VI editor.
Make the script file executable: chmod u+x StartIxian.sh.
Use the new “StartIxian.sh” file to start the DLT Node with the specified options ./StartIxian.sh.

Upgrading the DLT Node software

When a new version is released, you can upgrade the software using the following checklist:

Note: It is recommended to backup the wallet file ixian.wal before performing any upgrade or changing any settings on the command line.

Note: We assume that you have followed the above instructions and the Ixian directory names are as follows:

Directory	Path
Ixian-Core	~/Ixian/Ixian-Core
Ixian-DLT	~/Ixian/Ixian-DLT
Executable	~/Ixian/Ixian-DLT/IxianDLT/bin/Release/net6.0

If you have placed the Ixian source code folders elsewhere, change them in the below description. Furthermore, if you copied the executable files from the bin/Release folder someplace else, you will need to repeat the copy step to overwrite old executable files with new ones.

Save the Ixian wallet file: cp ~/Ixian/Ixian-DLT/IxianDLT/bin/Release/net6.0/ixian.wal ~/ixian.wal.backup.
Shutdown the Ixian DLT Node.
Switch to the Ixian-Core directory: cd ~/Ixian/Ixian-Core.
Update the sources to the latest version: git pull.
Switch to the Ixian-DLT directory: cd ~/Ixian/Ixian-DLT.
Update the sources to the latest version: git pull.
Compile the new sources: sh rebuild.sh.
Start the Ixian DLT Node again. The node will use the existing wallet file and downloaded data, so it will not need to generate a new wallet or synchronize again.

Configuration file

See DLT Node Configuration options for details.