Day 98/100 : Mastering ERC-20: Building Coinismus ($CNS) with Solidity and OpenZeppelin

#100DaysOfSolidity RWE 098 : “Mastering ERC-20”

3 min readSep 12, 2023

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Welcome to the #100DaysOfSolidity series! In this technical tutorial, we’re going to explore the nitty-gritty details of creating an advanced ERC-20 token named Coinismus ($CNS) using Solidity v0.8.20. We’ll leverage the robust OpenZeppelin libraries to build a token that not only complies with the ERC-20 standard but also incorporates advanced features, security measures, and testing practices for a rock-solid smart contract.

Mastering ERC-20: Building Coinismus ($CNS) with Solidity and OpenZeppelin

1. Prerequisites

Before we dive into the code, ensure you have the following prerequisites:

Solidity and Development Environment: Make sure Solidity v0.8.20 is installed on your machine, and you’re equipped with a code editor. For this tutorial, we recommend Visual Studio Code (VSCode).
Solidity Knowledge: A strong understanding of Solidity is vital. If you’re new to Solidity, it’s recommended to study the official documentation and complete some basic tutorials.
OpenZeppelin Familiarity: Familiarize yourself with the OpenZeppelin library, as we’ll be using it extensively. Install OpenZeppelin contracts via npm: `npm install @openzeppelin/contracts`.

2. Setting Up Your Development Environment

Let’s start by creating a new Solidity project and configuring our development environment:

mkdir CoinismusToken
cd CoinismusToken
npm init -y
npm install @openzeppelin/contracts
code .

3. Coding Coinismus Token

Now, let’s delve into the code. Create a new Solidity file, `CoinismusToken.sol`:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract CoinismusToken is ERC20Burnable, Ownable {
 constructor() ERC20("Coinismus", "CNS") {
 _mint(msg.sender, 1e9 ether); // Mint 1 billion CNS tokens to the contract creator
 }
function mint(address to, uint256 amount) public onlyOwner {
 _mint(to, amount);
 }
}

4. Compiling the Smart Contract

Compile your contract using the Solidity compiler:

npx hardhat compile

5. Deploying Coinismus Token

To deploy Coinismus to a local network for testing:

npx hardhat node # Start a local Ethereum node
npx hardhat run scripts/deploy.js — network localhost # Deploy the contract to localhost

6. Interacting with Coinismus

To interact with your token, create a JavaScript file, such as `interact.js`:

const ethers = require('ethers');
async function main() {
 const provider = new ethers.providers.JsonRpcProvider('http://localhost:8545'); // Connect to your local node
 const signer = new ethers.Wallet('YOUR_PRIVATE_KEY', provider); // Replace with your private key
 const contractAddress = 'YOUR_CONTRACT_ADDRESS'; // Replace with your contract address
const token = new ethers.Contract(
 contractAddress,
 [
 'function transfer(address to, uint256 amount)',
 'function mint(address to, uint256 amount)',
 ],
 signer
 );
const recipientAddress = 'RECIPIENT_ADDRESS'; // Replace with the recipient's address
 const amountToSend = ethers.utils.parseEther('10'); // Sending 10 CNS tokens
const tx = await token.transfer(recipientAddress, amountToSend);
 await tx.wait();
console.log(`Transferred ${amountToSend.toString()} CNS tokens to ${recipientAddress}`);
}
main();

7. Advanced Features and Testing

For advanced features like pausing functionality and permission structures, and for comprehensive testing using Hardhat, refer to our full tutorial.

8. Security Measures

Security is paramount. Consider implementing security measures such as input validation and external audit services to ensure the safety of your contract.

9. Beyond ERC-20

Expand your token’s functionality by integrating with other protocols, creating ERC-721 (NFTs), or adding governance features using libraries like OpenZeppelin’s Contracts.

10. Community Building

Engaging with your token’s community, listing on exchanges, and forming partnerships are essential for your token’s success.

This tutorial provides an in-depth understanding of Coinismus ($CNS) creation, exploring both basic and advanced aspects of ERC-20 token development. Feel free to adapt and extend this knowledge as you continue your blockchain development journey.

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Prepare yourself for exciting developments in the world of Coinismus! 🚀🔍💻

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