Using Local Node

This guide outlines steps to create a standalone local node to test CLV compatibility with Ethereum. Follow this guide and you will have a CLV node running in your local environment, which can be connected to the default Polkadot JS GUI.

1. Install build tools & libraries

CLV is the easiest to be set up on Unix-based operating systems like macOS or Linux. Here is the instruction on installing Rust's toolchains. If you have already done this, please go to the Step 3.


Open the Terminal application and execute the following commands:

# Install Homebrew if necessary
/bin/bash -c "$(curl -fsSL"

# Make sure Homebrew is up-to-date, install openssl and cmake
brew update
brew install openssl cmake


Use a terminal shell to execute the following commands:

sudo apt update
# May prompt for location information
sudo apt install -y cmake pkg-config libssl-dev git build-essential clang libclang-dev curl

Arch Linux

Run these commands from a terminal:

pacman -Syu --needed --noconfirm cmake gcc openssl-1.0 pkgconf git clang
export OPENSSL_LIB_DIR="/usr/lib/openssl-1.0"
export OPENSSL_INCLUDE_DIR="/usr/include/openssl-1.0"

2. Install Rust toolchain

This guide uses rustup to help manage the Rust toolchain. First, install and configure rustup:

# Install
curl -sSf | sh
# Configure
source ~/.cargo/env

3. Compile the node

Let's start by cloning the master branch of the CLV repo that you can find here:

git clone
cd clover

Once you have followed all of the steps above, it's time to build the standalone node by running:

cargo build --release --features clover-testnet

The initial build will take a while, depending on your hardware. It may take 30 minutes for the build process to complete.

4. Run the Node

Then you will want to run the node in dev mode using the following command:

./target/release/clover --dev --rpc-cors=all  --unsafe-rpc-external  --unsafe-ws-external --validator --tmp -lruntime=debug

You should see an output that looks like the following, showing that blocks are being produced:

The local standalone CLV node provides two RPC endpoints:

  • HTTP:

  • WS: ws://

Connecting Polkadot JS Apps to a Local CLV Node

The locally-running CLV node is a Substrate-based node, so we can interact with it using standard Substrate tools. Let’s start by connecting it with CLV JS Apps. Visit and you will see Polkadot JS Apps and are automatically connected to the Polkadot MainNet.

Click on the top left corner to open the menu and configure the networks, then navigate down to open the Development sub-menu. Select the "Local Node" option which points Polkadot JS Apps to ws:// Next, click on the Switch button and the site should be successfully connected to your standalone CLV node.

With Polkadot JS Apps connected, you will see the standalone CLV node producing blocks.

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