⚙️ Validator Node - 0.4.0

🛠️ Hardware Requirements

Node Type	CPU	RAM	Storage
Full (Recommended)	8v CPU	64 GB	1 TB NVME SSD

Additional requirements

• For using the prebuilt 0gchaind- you need to run Ubuntu - 20.04

• Go version - 1.21 or newer

• Network Bandwidth: 100 MBps for Download / Upload

Chain ID	Version tag	Binary Name	Binary Home
zgtendermint_16600-2	v0.4.0	0gchaind	$HOME/.0gchain

⏱️ Installation time: ~20-40 minutes

The installation time depends on many factors, such as your skills, resources and characteristics of your server, the most important: disk speed, internet connection, server load CPU, RAM, so this value may differ from the one indicated by us.

⚡ Automatic installation

bash <(curl -s https://raw.githubusercontent.com/UnityNodes/scripts/main/0g-testnet/0g-install.sh)

With the help of a one-line script, all the necessary commands will be executed automatically, you only need to check the operation of your node at the end, for this, go directly to 📌Step 3: Node Health Check

📝 Manual installation

📌Step 1: Installation packeges and dependencies

# Install dependencies for building from source
sudo apt update
sudo apt install -y lz4 jq make git gcc build-essential curl chrony unzip gzip snapd tmux bc

# Install Go if you need
sudo rm -rf /usr/local/go
curl -L https://go.dev/dl/go1.21.6.linux-amd64.tar.gz | sudo tar -xzf - -C /usr/local
echo 'export PATH=$PATH:/usr/local/go/bin:$HOME/go/bin' >> $HOME/.bash_profile
source .bash_profile

📌Step 2: Set moniker and install node

Give your validator a name by which you can find yourself in explorer, put it in ""

MONIKER="" 

After that, insert the following node installation command

# Clone project repository
cd $HOME
rm -rf 0g-chain
git clone https://github.com/0glabs/0g-chain.git
cd 0g-chain
git checkout v0.4.0
git submodule update --init
make install

# Set node CLI configuration
0gchaind config chain-id zgtendermint_16600-2
0gchaind config keyring-backend test
0gchaind config node tcp://localhost:26657

# Initialize the node
0gchaind init "$MONIKER" --chain-id zgtendermint_16600-2

# Download genesis and addrbook files
wget https://snapshots-testnet.unitynodes.com/0gchain-testnet/addrbook.json -O $HOME/.0gchain/config/addrbook.json
wget https://snapshots-testnet.unitynodes.com/0gchain-testnet/genesis.json -O $HOME/.0gchain/config/genesis.json

# Set seeds, peers
SEEDS="81987895a11f6689ada254c6b57932ab7ed909b6@54.241.167.190:26656,010fb4de28667725a4fef26cdc7f9452cc34b16d@54.176.175.48:26656,e9b4bc203197b62cc7e6a80a64742e752f4210d5@54.193.250.204:26656,68b9145889e7576b652ca68d985826abd46ad660@18.166.164.232:26656"
sed -i 's|^seeds *=.*|seeds = "'$SEEDS'"|; s|^persistent_peers *=.*|persistent_peers = "'$PEERS'"|' $HOME/.0gchain/config/config.toml

# Set minimum gas price
sed -i "s/^minimum-gas-prices *=.*/minimum-gas-prices = \"0ua0gi\"/" $HOME/.0gchain/config/app.toml

# Set pruning
pruning="custom"
pruning_keep_recent="100"
pruning_keep_every="0"
pruning_interval="50"
sed -i -e "s/^pruning *=.*/pruning = \"$pruning\"/" $HOME/.0gchain/config/app.toml
sed -i -e "s/^pruning-keep-recent *=.*/pruning-keep-recent = \"$pruning_keep_recent\"/" $HOME/.0gchain/config/app.toml
sed -i -e "s/^pruning-keep-every *=.*/pruning-keep-every = \"$pruning_keep_every\"/" $HOME/.0gchain/config/app.toml
sed -i -e "s/^pruning-interval *=.*/pruning-interval = \"$pruning_interval\"/" $HOME/.0gchain/config/app.toml

# Download latest chain data snapshot
curl https://snapshots-testnet.unitynodes.com/0gchain-testnet/0gchain-testnet-latest.tar.lz4 | lz4 -dc - | tar -xf - -C $HOME/.0gchain

# Create service
sudo tee /etc/systemd/system/0gchaind.service > /dev/null << EOF
[Unit]
Description=0G node service
After=network-online.target
[Service]
User=$USER
ExecStart=$(which 0gchaind) start
Restart=on-failure
RestartSec=10
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF

### Start service and run node
echo ""
printColor blue "[6/6] Start service and run node"

sudo systemctl daemon-reload
sudo systemctl enable 0gchaind.service
sudo systemctl start 0gchaind.service

📌Step 3: Node Health Check

Follow the commands to check if your node is working properly

1. Check version

0gchaind version

1. View sync status

local_height=$(0gchaind status | jq -r .sync_info.latest_block_height); network_height=$(curl -s https://rpc.0gchain-testnet.unitynodes.com/status | jq -r .result.sync_info.latest_block_height); blocks_left=$((network_height - local_height)); echo "Your node height: $local_height"; echo "Network height: $network_height"; echo "Blocks left: $blocks_left"

Blocks left - 0-1 everything is fine and your node catches up with the last block of the network.

1. Check logs

tail -f -n 100 $HOME/.0gchain/log/chain.log

If your node is installed and fully synchronized with the network, proceed with the creation of the validator.

For any questions you may have during installation, please contact our chat team or other project validators.

📝 Create Validator

📌Step 1: Create wallet

0gchaind keys add wallet --eth

Save all information after entering the command, without this you will not be able to restore data to the wallet. SAVE SEED PHRASE (12 words).

📌Step 2: Request test tokens to your wallet address

We request the private key from our EVM address

0gchaind keys unsafe-export-eth-key wallet # or your wallet name

Press Y and enter

We keep this private key with us

Go to the metamask and import the wallet using it:

We open the Faucet 0G Link 🚰 and request tokens to the metamask address we received

📌Step 3: Check your balance in terminal

0gchaind q bank balances $(0gchaind keys show $WALLET_NAME -a)

If you have received tokens and your balance shows test tokens, proceed to the step of creating a validator.

📌Step 4: Create validator

0gchaind tx staking create-validator \
--amount 1000000ua0gi \
--chain-id=zgtendermint_16600-2 \
--pubkey $(0gchaind tendermint show-validator) \
--moniker "$NODE_MONIKER" \
--identity "" \
--website "" \
--details "" \
--commission-rate 0.1 \
--commission-max-rate 0.2 \
--commission-max-change-rate 0.01 \
--min-self-delegation 1 \
--from YOUR_WALLET \
--gas-prices=0.25ua0gi  \
--gas-adjustment=1.5 \
--gas=auto \
-y

After entering the command, you will receive hash transactions, check the status in the explorer if the status is successful - you have created a validator. You can find your validator here: explorer In the Active / Inactive lists.

📌Step 5: Backup.

If you have successfully created a validator, be sure to save your validator.

Show priv_validator_key.json

cat $HOME/.0gchain/config/priv_validator_key.json

SAVE YOUR PRIVATE KEY AFTER ENTERING THE COMMAND The priv_validator_key.json is the key with which you can always restore the operation of your validator, so keep it and in case of reinstallation/transfer of the validator to another server - transfer it too.

Also remember, if you are a validator with a sufficient number of delegated tokens and you are in an active set, signing blocks, always save priv_validator_state.json - this file contains information about the signed blocks of your validators, and in case of restoring the validator after reinstallation or on another server , this file won't give you the old blocks again, otherwise you'll end up in jail with no way out 💡 Hint:

• View private key: cat $HOME/.0gchain/config/priv_validator_key.json

• View private state: cat $HOME/.0gchain/config/priv_validator_key.json

• Private key directory: $HOME/.0gchain/config/priv_validator_key.json

• Validator state directory: $HOME/.0gchain/data/priv_validator_state.json

All the useful commands to manage your node in the section - Useful commands