Using Hardhat

Here is a detailed explanation of what Hardhat is and a step-by-step guide on how to deploy a TEP721 contract using hardhat:

What is Hardhat ?

Hardhat is a development environment for Ethereum and Ethereum-compatible blockchains. It provides a comprehensive toolset for smart contract development, testing, debugging, and deployment.

Step-by-Step Guide to Deploy Contract

Follow these steps to deploy a TEP721 contract using Hardhat:

1.Install Hardhat

Ensure you have Node.js and npm installed. Then, create a new directory for your project and initialize it with Hardhat:

mkdir TEP721Project
cd TEP721Project
npm init -y
npm install --save-dev hardhat

2.Initialize Hardhat Project

Run the following command to initialize a Hardhat project:

npx hardhat

Follow the prompts to create a new Hardhat project, selecting the appropriate options for your needs.

3.Write the Contract

Create a new file TEP721NFT.sol in the contracts directory and add your TEP721NFT code:

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract TEP721NFT is ERC721, Ownable {
    uint256 private _nextTokenId;

    constructor()
        ERC721("TEP721NFT", "TPFT")
        Ownable(msg.sender)
    {}

    function safeMint(address to) public onlyOwner {
        uint256 tokenId = _nextTokenId++;
        _safeMint(to, tokenId);
    }
}

4.Write the Deployment Script

Create a new file deploy.js in the scripts directory to write your deployment script:

async function main() {

  const [deployer] = await ethers.getSigners();
  console.log("Deploying the contracts with the account:",await deployer.getAddress());
  console.log("Account balance:", (await deployer.getBalance()).toString());
  
  const TEP721NFT = await ethers.getContractFactory("TEP721NFT");
  const token = await TEP721NFT.deploy();
  await token.deployed({ gasLimit: 6000000 });

  console.log("TEP721NFT address:", token.address);
}
main()
  .then(() => process.exit(0))
  .catch((error) => {
    console.error(error);
    process.exit(1);
  });

5.Configure Network

Make sure to install the suggested versions of the packages:

npm install --save-dev @nomiclabs/hardhat-ethers@^2.2.3 @nomiclabs/hardhat-waffle@^2.0.6 @openzeppelin/contracts@^5.0.2 @uniswap/v3-periphery@^1.0.1 bignumber.js@^9.1.2 dotenv@^16.4.5 ethereum-waffle@^4.0.10 [email protected] hardhat@^2.22.4

Create a `.env` file in the root of your project directory to store your private key.

// In .env file

YOUR_PRIVATE_KEY = "YOUR_PRIVATE_KEY"

Update the hardhat.config.js file to include network configurations:

require("@nomiclabs/hardhat-waffle");

/** @type import('hardhat/config').HardhatUserConfig */
const privateKey = process.env.YOUR_PRIVATE_KEY;;
module.exports = {
  solidity: {
   version: "0.8.20",
   settings: {
    optimizer:{
      enabled:true,
      runs:1000,
      details:{yul:false},  
    }
   }
  },
  networks: {
    taral: {
      chainId: 4442,
      url: "https://devnet-rpc1.tanledger.com",
      accounts: [privateKey],
    },
  },
};

6.Deploy the Contract

Run the deployment script with Hardhat:

npx hardhat run scripts/deploy.js --network tan

Congratulations!! You have successfully deployed your TEP721 token contract using Hardhat. This guide covered the entire process from setting up the Hardhat project to deploying the contract.