EIP712 Node.js Project

A Node.js application with Express.js framework and ethers.js for Ethereum interactions.

Features

• Express.js web server
• JSON API endpoints
• Health check endpoint
• Environment variable support
• Ethers.js integration for Ethereum blockchain interactions
• EIP-712 typed data signing support

Getting Started

Prerequisites

• Node.js (version 14 or higher)
• npm

Installation

1. Clone the repository or navigate to the project directory
2. Install dependencies:

   npm install

Running the Application

Start the development server:

npm start

Or run directly with Node:

node index.js

The application will be available at http://localhost:3000

Available Endpoints

• GET / - Welcome message
• GET /health - Health check endpoint
• POST /ethereum/wallet - Create a new Ethereum wallet
• POST /ethereum/sign-typed-data - Sign EIP-712 typed data

Scripts

• npm start - Start the application
• npm test - Run tests (to be implemented)
• npm run dev - Start in development mode with nodemon

Environment Variables

• PORT - Server port (default: 3000)
• PRIVATE_KEY - Ethereum private key for signing (optional)

Dependencies

• express - Web framework
• ethers - Ethereum library for interacting with the blockchain

Project Structure

eip712/
├── index.js          # Main application file
├── package.json      # Project configuration
├── README.md         # Project documentation
└── .gitignore        # Git ignore file

Ethereum Features

This project includes ethers.js for:

• Creating and managing Ethereum wallets
• Signing EIP-712 typed data
• Interacting with smart contracts
• Sending transactions
• Reading blockchain data