How to Deploy Your Own Blockchain on Juneo Supernet: A Step-by-Step Guide

Deploying a blockchain on Juneo Supernet’s Multi-Chain Network (MCN) can be a powerful way to scale your decentralized applications and take advantage of Juneo’s robust infrastructure. This guide will walk you through the process, even if you’re new to blockchain development.

What is a Multi-Chain Network (MCN) in Juneo Supernet?

A Multi-Chain Network (MCN) in Juneo Supernet allows developers to create and manage multiple blockchains within a single network. This offers flexibility, scalability, and enhanced security by enabling the deployment of custom Virtual Machines (VMs) on each blockchain. The Juneo Supernet is designed to be developer-friendly, making it accessible for a wide range of projects, from small startups to large enterprises.

Benefits of Using MCN in Juneo Supernet

• Scalability: Deploy multiple blockchains tailored to your needs without worrying about the limitations of a single chain.
• Customization: Develop and deploy your own Virtual Machines (VMs) to create unique blockchain environments.
• Cost-Efficiency: Leverage Juneo Supernet’s infrastructure to reduce overhead costs while maintaining control over your network.
• Security: Benefit from Juneo Supernet’s robust security features, including the ability to add validators to your MCN, ensuring network integrity.

Now, let’s dive into the step-by-step process of creating and deploying a blockchain on the Juneo Supernet MCN.

Step 1: Prerequisites

Before you begin, ensure you have the following:

1. A Running Node: You must have a running node that is validating the primary network. If you don’t have one, follow the “Add a Juneo Supernet Validator Node” guide to set it up.
2. Latest NodeJS: Make sure you have the latest version of NodeJS installed. You can download it from nodejs.org.
3. npm Package ts-node: This package is needed to execute the example code provided in JuneoJS. Install it using npm install -g ts-node.

Step 2: Download JuneoJS Examples

You’ll be using the example code from the juneojs-examples repository to deploy your MCN. Here's how to get it:

1. Open your command line interface (CLI).
2. Run the following command to clone the repository:

git clone https://github.com/Juneo-io/juneojs-examples

Step 3: Set Up Your Environment

1. Navigate to the juneojs-examples directory in your CLI.
2. Install the necessary dependencies by running:

npm install

3. Open the juneojs-examples directory in your preferred code editor.

4. Create a .env file from the provided .env.example file.

5. Paste your mnemonic phrase into the MNEMONIC variable in the .env file:

MNEMONIC="your-mnemonic-phrase-here"

Step 4: Cross-Chain Transfers

Before deploying your MCN, you’ll need to transfer assets across different chains. Here’s how:

• Cross 1.1 JUNE from the JUNE-chain to the JVM-chain:

npx ts-node ./src/docs/crossJUNEtoJVM.ts

• Cross 1 JUNE from the JVM-chain to the P-chain:

npx ts-node ./src/docs/crossJVMtoP.ts

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Step 5: Create Your MCN

Now that your assets are in place, it’s time to create your MCN:

• In your CLI, execute the following command:

npx ts-node ./src/supernet/createSupernet.ts

• After running this command, you’ll receive an output containing your supernetID. This ID is essential, so make sure to save it.

Step 6: Add a Validator to Your MCN

To activate your MCN, you’ll need to add a validator:

• Open the file ./src/supernet/addSupernetValidator.ts in your code editor.
• Update the following variables with the correct values:

const nodeId: string = 'YourNodeIDHere'
const supernetId: string = 'YourSupernetIDHere'
const durationInDays: number = 20 // Adjust as needed

• Save the file and execute the following command in your CLI:

npx ts-node ./src/supernet/addSupernetValidator.ts

Step 7: Configure Your Node

To start validating your MCN, you need to configure your node:

• Create or edit the config.json file in your node's home directory.
• Add the track-supernets flag to include your supernetID:

{
  "track-supernets":"YourSupernetIDHere"
}

• Save the file and restart your node using the appropriate command based on your setup:

Manual Setup:

./juneogo --config-file="./config.json"

Install Script Setup:

systemctl --user restart juneogo.service

Docker Setup:

Restart your node using Docker Compose.

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Congratulations! You’ve successfully deployed a blockchain on Juneo Supernet’s MCN. By following this guide, you’ve tapped into the powerful capabilities of the Juneo Supernet, creating a scalable and secure environment for your decentralized applications.

The Juneo Supernet is designed to empower developers, offering the tools and flexibility needed to build and manage blockchain networks with ease. Whether you’re a seasoned developer or new to blockchain, Juneo Supernet provides a welcoming platform to bring your projects to life.

Get in touch with Juneo Supernet

Website: https://juneo.com/
X: https://x.com/JUNEO_official
Telegram: https://t.me/JuneoOfficial
Github: https://github.com/Juneo-io
Discord: https://discord.gg/KTta2nqh