Nethermind Validator is currently running on POSDAO in Beta. A new release is expected in the near future:



Nethermind Launcher is a self-contained app - you do not need to install .NET separately to run it.

📄 Nethermind Docs:

📦 Latest Packages:

🛑 To stop Nethermind: Control + c


The Nethermind Launcher will present several options on start. Use arrow keys to select options. See here for available CLI methods - CLI supports javascript.

When you start the Launcher choose the following options to sync a node:

  • Start Nethermind: Node

  • Select network: xDai

  • Select sync: Fast sync


  1. Install dependencies: brew install gmp && brew install snappy && brew install lz4

  2. Download mac package

  3. Unzip the file

  4. cd into the folder

  5. ./Nethermind.Launcher

  6. Select desired configuration


  1. Download windows package

  2. Unzip the file

  3. run Nethermind.Launcher.exe

  4. Select desired configuration

Linux (Ubuntu 16.04 or above)

1) Install dependencies:

sudo apt update && sudo apt install libsnappy-dev libc6-dev libc6 unzip

2) Create a new user

sudo useradd -m -s /bin/bash nethermind

3) Increase the max number of open files

sudo bash -c 'echo "nethermind soft nofile 1000000" > /etc/security/limits.d/nethermind.conf'
sudo bash -c 'echo "nethermind hard nofile 1000000" >> /etc/security/limits.d/nethermind.conf'

4) Switch to the new user

sudo su - nethermind

5) Get Nethermind: download the latest Nethermind (not NDM) package (list is here:


6) Extract the files

unzip [LINUX_PACKAGE_FILENAME] -d nethermind

7) Switch directories

cd nethermind

8) Start the Nethermind Launcher