Validator Node Setup
Running the Validator Node on GAN Chain
Ready to run your Validator Node? Just follow these simple terminal commands one-by-one, and you’ll be validating the GAN CHAIN network in no time!
Step 1: Install Docker
Before running the node, you need to have Docker installed. Let’s start by removing any conflicting packages that might interfere:
for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do sudo apt-get remove $pkg; done
Step 2: Setup Docker APT Repository
Add Docker’s official GPG key and set up the repository on your Ubuntu system:
# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc
# Add the repository to Apt sources:
echo \
"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
$(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update
Step 3: Install Docker Engine and Plugins
Now install Docker Engine along with necessary CLI tools and plugins:
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
Step 4: Add Your User to Docker Group
This allows you to run Docker commands without sudo.
sudo groupadd docker
sudo usermod -aG docker $USER
Important: Log out and log back in (or restart your terminal session) to apply group changes. You can logout by running:
logout
Step 5: Run the Validator Node
With Docker ready, execute this command to download and start your GAN CHAIN Validator Node:
wget https://github.com/brahmGAN/ganchain-v2/releases/download/v2.0.0/gpunet_node.sh ; sudo chmod +x gpunet_node.sh ; ./gpunet_node.sh
Step 6: Check Your Node Logs
To verify that your node is running smoothly, check the logs with:
docker logs GPUNetValidator
This will display the output and status of your Validator Node container.
Adding Your Validator to the GANscan Explorer
After running your GAN CHAIN validator node, the final step is to register it on the blockchain via the GANscan Explorer so it can start participating in consensus and earning rewards.
Part 1: Generate Keys Using author_rotateKeys
To link your validator to the network, you need to generate session keys from your validator node.
Step 1: Run the Key Generation Command
On the same machine where your validator node is running, execute the following command:
This command will return a JSON object like:
{
"jsonrpc": "2.0",
"result": "0x1234abcd...your-key...",
"id": 1
}
Copy the value from the "result" field. This is your validator session key save it securely, you’ll need it shortly.
Part 2: Register as Validator in GANscan
Now that you have your session key, you can add your validator to the GAN CHAIN staking system through the GANscan explorer.
Step 2: Navigate to the Staking Dashboard
Make sure your SS58 account is connected via the Polkadot{.js} extension
Step 3: Add Validator
Click on the ➕ Validator icon (labelled "Validator" with a plus symbol).
In the pop-up window:
Select your SS58 account from the dropdown.
Enter the amount you want to bond (minimum: 100 GPoints).
Click Next.
Step 4: Paste Session Key
In the next window, find the field labelled “keys from rotateKeys”.
Paste the session key you generated earlier (0x... format).
Step 5: Click Bond & Validate.
Sign and Submit the transaction using your Polkadot{.js} wallet.
After successful submission:
Your validator will appear in the Pending Validators list.
It will begin producing blocks and earning rewards starting from the next era. One Era = 24 hours
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