Welcome Developers DApp

A minimal decentralized application (DApp) that interacts with an Ethereum smart contract using MetaMask and Ethers.js.

🧾 Features

• Connect to MetaMask
• View the welcome message from the smart contract
• Update the message on the blockchain
• Display current contract message
• Frontend deployed on Vercel

🧱 Smart Contract

This frontend interacts with the following Solidity contract:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

contract WelcomeDevelopers {
    string smessage = "Welcome Developers to Ethereum !";

    function getMessage() public view returns (string memory) {
        return smessage;
    }

    function setMessage(string memory lmessage) public {
        smessage = lmessage;
    }

    function getBalance() public view returns (uint) {
        return address(this).balance;
    }
}

🚀 How to Run Locally

1. Clone the Repository

git clone https://github.com/nikhilvc1990/MessageDApp.git
cd MessageDApp

2. Install Dependencies

npm install

3. Compile the Smart Contract

npx hardhat compile

4. Deploy the Contract Locally

First, start a local Hardhat network:

npx hardhat node

In another terminal window, deploy the contract:

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

Or

npx hardhat ignition deploy ./ignition/modules/WelcomeDevelopers.js --network localhost

After deployment, copy the deployed contract address. You'll use it in the UI (index.html).

🌍 Host User Interface

1. Serve the UI

Open a new terminal in the root folder (MessageDApp)

2. Set the Contract Address

Update the contractAddress variable in your index.html file:

const contractAddress = "YOUR_DEPLOYED_CONTRACT_ADDRESS";

🔍 To Serve Frontend Locally:

From the root folder:

npx serve .

Deploy on Vercel

Go to https://vercel.com

Import the GitHub repo

Click Deploy

Your frontend will be live on a Vercel URL.

💡 Requirements

1. MetaMask extension installed in your browser: make sure the hardhat accounts are imported in your metamask to interact with hardhat instance
2. Node.js and npm
3. Vercel account (free)