🧠 Decentralized Blockchain Chat DApp

A production-grade peer-to-peer messaging platform built on Ethereum using smart contracts — no servers, no databases, fully decentralized.

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🌐 Live Demo

🔗 Live App: https://chat-dapp-live.netlify.app/

🚀 Overview

This project demonstrates a complete end-to-end Web3 application where users communicate directly through blockchain transactions.

Unlike traditional chat apps that rely on centralized servers, this system stores relationships and messages on-chain, ensuring:

• 🔐 Trustless communication
• 🌐 Censorship resistance
• 🧾 Immutable message history
• 👛 Wallet-based identity

Designed to showcase real-world smart contract architecture + modern Web3 frontend engineering.

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✨ Key Features

🔑 Authentication & Identity

• MetaMask wallet login (no passwords)
• On-chain account creation
• Address-based identity system

👥 Social Layer

• Add friends via public wallet address
• Mutual friend relationship enforcement
• Dynamic friend list retrieval

💬 Messaging System

• Peer-to-peer blockchain messaging
• Deterministic chat channels
• Immutable message storage
• Timestamped conversations
• Real-time UI updates

🖥️ Frontend Experience

• Responsive mobile-first design
• Modern chat interface
• Message alignment (sender vs receiver)
• Attachment picker UI
• Dismissible error handling
• Optimized re-render performance

⛓️ Blockchain Integration

• Smart contract-controlled state
• Gas-efficient data structures
• Multi-network support
• Holesky / Sepolia compatible

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🏗️ Architecture

User (MetaMask) │ ▼ Frontend (Next.js + React) │ ▼ Ethers.js / Web3Modal │ ▼ Smart Contract (Solidity) │ ▼ Ethereum Network(Mainnet/Testnet)

Try running some of the following tasks:

npx hardhat help
npx hardhat compile
REPORT_GAS=true npx hardhat test
npx hardhat node
npx hardhat run scripts/deploy.js --network localhost
npx hardhat run scripts/deploy.js

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⚙️ Local Setup

1. Clone Repository

git clone https://github.com/MayankSharma-ops/BlockChain-ChatDApp.git
cd BlockChain-ChatDApp

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Install Dependencies

npm install

Run Development Server

npm run dev

👨‍💻 Author

Mayank Sharma 🐙 GitHub: https://github.com/MayankSharma-ops

💼 Web3 / Full-Stack Developer

BlockChain-ChatDApp

0x5FbDB2315678afecb367f032d93F642f64180aa3

##LICENSE MIT Liscense