🪙 How to create your own ERC-20 Token

.env.example

API_URL="https://eth-goerli.g.alchemy.com/v2/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
PRIVATE_KEY="0000000000000000000000000000000000000000000000000000000000000000"
ETHERSCAN_API_KEY="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
CONTRACT_ADDRESS="update after deploying"

deploy.js

main()

async function main () {
  try {
    const SusukidaCoin = await ethers.getContractFactory("SusukidaCoin")
    const susukidaCoin = await SusukidaCoin.deploy()

    console.info(`Token address: ${susukidaCoin.address}`)
  } catch (err) {
    console.error(err)
  }
}

hardhat.config.js

/** @type import('hardhat/config').HardhatUserConfig */

require('dotenv').config()
require('@nomiclabs/hardhat-ethers')
require('@nomiclabs/hardhat-etherscan')

module.exports = {
  solidity: "0.8.9",
  defaultNetwork: "goerli",
  networks: {
    hardhat: {},
    goerli: {
      url: process.env.API_URL,
      accounts: [`0x${process.env.PRIVATE_KEY}`],
    },
  },
  etherscan: {
    apiKey: process.env.ETHERSCAN_API_KEY,
  },
};

package.json

{
  "name": "how-to-mint-erc20-token",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "deploy": "hardhat run scripts/deploy.js",
    "verify": "source .env && hardhat verify --contract contracts/SusukidaCoin.sol:SusukidaCoin $CONTRACT_ADDRESS",
    "gist": "gist -od '🪙 How to create your own ERC-20 Token' contracts/SusukidaCoin.sol scripts/deploy.js .env.example hardhat.config.js package.json"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@openzeppelin/contracts": "^4.7.2",
    "dotenv": "^16.0.1"
  },
  "devDependencies": {
    "@nomiclabs/hardhat-ethers": "^2.1.0",
    "@nomiclabs/hardhat-etherscan": "^3.1.0",
    "hardhat": "^2.10.1"
  },
  "description": ""
}

SusukidaCoin.sol

//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.9;

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

contract SusukidaCoin is ERC20 {
  uint constant _initial_supply = 1000000 * (10**18);

  constructor() ERC20("SusukidaCoin", "SSKD") {
    _mint(msg.sender, _initial_supply);
  }
}