BlockRegistry

A decentralized naming registry DApp built with Next.js, Tailwind CSS, Shadcn UI components, and Hardhat for smart contract development. This project allows users to search for, register, renew, and transfer unique names on the blockchain.

Table of Contents

• Features
• Project Structure
• Prerequisites
• Setup & Installation
• Environment Variables
• Running the Project Locally
• Deployment
• Usage
• License

Features

• Name Search: Check if a desired name is available for registration.
• Name Registration: Register available names on the blockchain.
• Name Renewal: Extend ownership of names before expiry.
• Name Transfer: Transfer ownership to another wallet.
• Profile View: Manage all registered names.
• Adminless & Trustless: Powered by smart contracts on Ethereum.

Project Structure

project-root/
├── backend/                  # Hardhat smart contract project
│   ├── contracts/
│   ├── scripts/
│   ├── hardhat.config.js
│   └── .env                  # Environment variables
├── frontend/                 # Next.js frontend
│   ├── abi/
│   ├── app/
│   ├── components/
│   ├── lib/
│   └── public/                    
├── README.md
└── .gitignore

Prerequisites

• Node.js >= 18
• npm or yarn
• MetaMask or any Ethereum-compatible wallet

Setup & Installation

1. Clone the repository:

git clone https://github.com/kautilyadevaraj/decentralized-name-registry.git
cd decentralized-name-registry

2. Install backend dependencies:

cd backend
npm install

3. Install frontend dependencies:

cd ../frontend
npm install

Environment Variables

Create a .env file in both the backend/ directory.

Backend .env

SEPOLIA_RPC=https://eth-sepolia.g.alchemy.com/v2/YOUR_ALCHEMY_KEY
PRIVATE_KEY=YOUR_WALLET_PRIVATE_KEY

Note: Never commit .env files. They are listed in .gitignore.

Running the Project Locally

1. Compile and deploy contracts to Sepolia

cd backend
npx hardhat compile
npx hardhat run scripts/deploy.js --network sepolia

2. Copy ABI to frontend

cp backend/artifacts/contracts/NameRegistry.sol/NameRegistry.json frontend/abi/NameRegistry.json

3. Start the frontend

cd frontend
npm run dev

Open your browser at http://localhost:3000

Deployment

You can deploy the frontend easily using Vercel:

Add your environment variables on Vercel's dashboard.

Usage

• Register a Name: /register
• Search a Name: /search?name=yourname.dcn
• View Name Details: /name/yourname.dcn
• Renew a Name: /renew/yourname.dcn
• User Profile: /profile
• Explore All Names: /explore

License

MIT © 2025 Kautilya DK