Using Hardhat

Creating and Deploying an ERC-20 Token on BitciChain with Node.js and Hardhat

Introduction

This guide will take you through the process of creating and deploying an ERC-20 token on the Ethereum blockchain using Node.js and Hardhat.

Prerequisites

• Node.js installed on your machine.

• Familiarity with basic Ethereum concepts.

• A code editor of your choice (e.g., Visual Studio Code).

Step 1: Set Up the Project

1. Create a new directory for your project.

2. Open a terminal and navigate to the project directory.

3. Run npm init to initialize a new Node.js project. Follow the prompts to set up your package.json file.

Step 2: Install Hardhat

1. Install Hardhat: Run npm install --save-dev hardhat.

2. Run npx hardhat to create the Hardhat project structure. Follow the prompts to set up your Hardhat configuration.

Step 3: Write the ERC-20 Smart Contract

1. In the contracts directory, create a new file (e.g., MyToken.sol).

2. Write the ERC-20 token smart contract code in Solidity. Below is a basic example:

// MyToken.sol
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract MyToken is ERC20 {
    constructor() ERC20("MyToken", "MTK") {
        _mint(msg.sender, 1000000 * 10**18);
    }
}

Step 4: Install OpenZeppelin Contracts

1. Run npm install @openzeppelin/contracts to install the OpenZeppelin Contracts library.

Step 5: Configure Hardhat

1. In the hardhat.config.js file, add bitcichain as a new network.

require('@nomiclabs/hardhat-waffle');
require('@openzeppelin/hardhat-upgrades');

module.exports = {
    networks: {
        bitcichain: {
            chainId: 1907,
            url: "https://rpc.bitci.com",
            accounts: ["your-private-key"],
        },
    }
};

Step 6: Deploy the ERC-20 Token

1. In the scripts directory, create a new deployment script (e.g., deploy.js).

// deploy.js
async function main() {
    const MyToken = await ethers.getContractFactory("MyToken");
    const myToken = await MyToken.deploy();

    console.log("MyToken deployed to:", myToken.address);
}

main().then(() => process.exit(0)).catch(error => {
    console.error(error);
    process.exit(1);
});

1. Run the deployment script: npx hardhat run scripts/deploy.js --network bitcichain.

Step 7: Interact with the Deployed ERC-20 Token

1. Use the Hardhat console or create a separate script to interact with the deployed ERC-20 token.

// interact.js
async function main() {
    const MyToken = await ethers.getContractFactory("MyToken");
    const myToken = await MyToken.attach("0xYourDeployedTokenAddress");

    const balance = await myToken.balanceOf("0xYourAddress");
    console.log("Your balance:", balance.toString());
}

main().then(() => process.exit(0)).catch(error => {
    console.error(error);
    process.exit(1);
});

1. Run the interaction script: npx hardhat run scripts/interact.js --network bitcichain.

Congratulations! You have created and deployed an ERC-20 token on BitciChain using Node.js and Hardhat.

Additional Resources

• Hardhat Documentation

• OpenZeppelin Contracts Documentation