Using Truffle

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

What is Truffle ?

Truffle is a development framework for Ethereum and Ethereum-compatible blockchains such as TAN-chain. It provides a suite of tools for smart contract development, including a built-in compiler, a testing framework, and scripts to deploy contracts.

Step-by-Step Guide to Deploy Contract

Follow these steps to deploy a TEP721 contract using Truffle:

1.Install Truffle

Ensure you have Node.js and npm installed. Then, install Truffle globally:

npm install -g truffle

2.Initialize Truffle Project

Create a new directory for your project:

mkdir TEP721Project
cd TEP721Project

Initialize the project with Truffle:

truffle init

This command creates a basic Truffle project structure with the following directories:

• contracts: Where your smart contracts go.

• migrations: Where deployment scripts go.

• test: Where your test scripts go.

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.Compile the Contract

Run the following command to compile your contract:

truffle compile

This command compiles the contracts in the contracts directory and generates the necessary artifacts in the build/contracts directory.

5.Write the Deployment Script

Create a new file 1_deploy_contracts.js in the migrations directory and add the following content:

const TEP721NFT = artifacts.require("TEP721NFT");

module.exports = function(deployer) {
  deployer.deploy(TEP721NFT);
};

6.Configure the Network

Install truffle-hdwallet-provider and dotenv:

npm install truffle-hdwallet-provider dotenv

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 truffle-config.js file to include the TAN-chain network configuration. For example:

const HDWalletProvider = require("truffle-hdwallet-provider");
require("dotenv").config();

const mnemonic = process.env.YOUR_PRIVATE_KEY;

module.exports = {

  networks: {
    
    taral: {
      provider: () => new HDWalletProvider(mnemonic,"https://devnet-rpc1.tanledger.com"),
      network_id: 4442,
      chainId:4442
    }
   
  },

  mocha: {
    // timeout: 100000
  },

  // Configure your compilers
  compilers: {
    solc: {
      version: "0.8.20", // Fetch exact version from solc-bin (default: truffle's version)
   
    }
  },
};

7.Deploy the Contract

Run the following command to deploy the contract to the specified network:

truffle migrate --network tan

Congratulations!! You have successfully deployed your TEP-721 token contract on the TAN-chain network using Truffle. This guide covered the entire process from setting up the Truffle project to deploying the contract.