> For the complete documentation index, see [llms.txt](https://services.noderuner.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://services.noderuner.xyz/zenrock/sidecar.md).

# Sidecar

### **Install the Sidecar**

```bash
mkdir -p $HOME/.zrchain/sidecar/bin
mkdir -p $HOME/.zrchain/sidecar/keys
```

### **Install the Binary File**

```bash
wget -O $HOME/.zrchain/sidecar/bin/zenrock-sidecar https://releases.gardia.zenrocklabs.io/validator_sidecar-1.2.3
chmod +x $HOME/.zrchain/sidecar/bin/zenrock-sidecar
```

### **Clone Zenrock Validators**

```bash
cd $HOME
git clone https://github.com/zenrocklabs/zenrock-validators
```

### **Set a Password for Sidecar Wallets**

```bash
read -p "Enter password for the keys: " key_pass
```

For `zsh`, use the command:

```bash
echo -n "Enter password for the keys: "
read key_pass
```

### **Build the BLS Binary**

```bash
cd $HOME/zenrock-validators/utils/keygen/bls/
go mod tidy
go build
```

### **Create a BLS Key**

```bash
bls_output_file=$HOME/.zrchain/sidecar/keys/bls.key.json
$HOME/zenrock-validators/utils/keygen/bls/bls --password $key_pass -output-file $bls_output_file
```

### **Build the ECDSA Binary**

```bash
cd $HOME/zenrock-validators/utils/keygen/ecdsa/
go mod tidy
go build
```

### **Create an ECDSA Key**

```bash
ecdsa_output_file=$HOME/.zrchain/sidecar/keys/ecdsa.key.json
ecdsa_creation=$($HOME/zenrock-validators/utils/keygen/ecdsa/ecdsa --password $key_pass -output-file $ecdsa_output_file)
ecdsa_address=$(echo "$ecdsa_creation" | grep "Public address" | cut -d: -f2)
```

```bash
echo "ECDSA address: $ecdsa_address"
# Public address:  0xf36F077582B1c34D52f6e6964417fa52406827C1
```

**IMPORTANT** - To proceed, you need to fund the generated ECDSA key with Ethereum Holesky test tokens. You can use the faucet: <https://stakely.io/faucet/ethereum-holesky-testnet-eth>.

**IMPORTANT** - To continue, register at <https://app.infura.io> and obtain the following endpoints:

* Mainnet ETH: <https://xxx>
* Holesky ETH: <https://xxx>
* Holesky ETH WebSocket: wss\://xxx&#x20;

### **Set Variables**

```bash
EIGEN_OPERATOR_CONFIG="$HOME/.zrchain/sidecar/eigen_operator_config.yaml"
TESTNET_HOLESKY_ENDPOINT="<HTTPS_TESTNET_HOLESKY_ENDPOINT>"
MAINNET_ENDPOINT="<HTTPS_MAINNET_ENDPOINT>"
OPERATOR_VALIDATOR_ADDRESS_TBD="<ADDR_zenrockVALOPER>"
OPERATOR_ADDRESS_TBU=$ecdsa_address
ETH_RPC_URL="<HTTPS_TESTNET_HOLESKY_ENDPOINT>"
ETH_WS_URL="<WSS_TESTNET_HOLESKY_ENDPOINT>"
ECDSA_KEY_PATH=$ecdsa_output_file
BLS_KEY_PATH=$bls_output_file
```

### **Copy the Original Configuration Files**

```bash
cp $HOME/zenrock-validators/configs/eigen_operator_config.yaml $HOME/.zrchain/sidecar/
cp $HOME/zenrock-validators/configs/config.yaml $HOME/.zrchain/sidecar/
```

### **Update `config.yaml`**

```bash
sed -i "s|EIGEN_OPERATOR_CONFIG|$EIGEN_OPERATOR_CONFIG|g" "$HOME/.zrchain/sidecar/config.yaml"
sed -i "s|TESTNET_HOLESKY_ENDPOINT|$TESTNET_HOLESKY_ENDPOINT|g" "$HOME/.zrchain/sidecar/config.yaml"
sed -i "s|MAINNET_ENDPOINT|$MAINNET_ENDPOINT|g" "$HOME/.zrchain/sidecar/config.yaml"
```

### **Update `eigen_operator_config.yaml`**

```bash
sed -i "s|OPERATOR_VALIDATOR_ADDRESS_TBD|$OPERATOR_VALIDATOR_ADDRESS_TBD|g" "$HOME/.zrchain/sidecar/eigen_operator_config.yaml"
sed -i "s|OPERATOR_ADDRESS_TBU|$OPERATOR_ADDRESS_TBU|g" "$HOME/.zrchain/sidecar/eigen_operator_config.yaml"
sed -i "s|ETH_RPC_URL|$ETH_RPC_URL|g" "$HOME/.zrchain/sidecar/eigen_operator_config.yaml"
sed -i "s|ETH_WS_URL|$ETH_WS_URL|g" "$HOME/.zrchain/sidecar/eigen_operator_config.yaml"
sed -i "s|ECDSA_KEY_PATH|$ECDSA_KEY_PATH|g" "$HOME/.zrchain/sidecar/eigen_operator_config.yaml"
sed -i "s|BLS_KEY_PATH|$BLS_KEY_PATH|g" "$HOME/.zrchain/sidecar/eigen_operator_config.yaml"
```

### **Create a Service File**

```bash
tee /etc/systemd/system/zenrock-sidecar.service > /dev/null <<EOF
[Unit]
Description=Zenrock-sidecar
After=network-online.target

[Service]
User=$USER
ExecStart=$HOME/.zrchain/sidecar/bin/zenrock-sidecar
Restart=on-failure
RestartSec=30
LimitNOFILE=65535
Environment="OPERATOR_BLS_KEY_PASSWORD=$key_pass"
Environment="OPERATOR_ECDSA_KEY_PASSWORD=$key_pass"
Environment="SIDECAR_CONFIG_FILE=$HOME/.zrchain/sidecar/config.yaml"

[Install]
WantedBy=multi-user.target
EOF
```

```bash
systemctl daemon-reload
systemctl enable zenrock-sidecar
systemctl restart zenrock-sidecar && journalctl -u zenrock-sidecar -f -o cat
```