Set Up Your Environment

Install Node.js, create a project directory, and initialize it with:

npx create-eth-app@latest my-dapp

Connect a Wallet

Install MetaMask and import an Ethereum testnet account

Metamask Setup Guide

Write Smart Contracts

Create a basic Solidity contract in the contracts/ directory

pragma solidity ^0.8.0;

contract HelloWorld {
    string public message = "Hello Web3!";
}

Deploy to Testnet

Use Hardhat or Truffle to compile and deploy contract to Ropsten testnet

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

Frontend Integration

Connect to Ethereum network using Ethers.js or Web3.js:

const provider = new ethers.providers.Web3Provider(window.ethereum);
const signer = provider.getSigner();

Test Transactions

Send test transactions using Ropsten faucet and MetaMask

Get Ropsten ETH