Ethereum Wallet Validator

A simple web application built with React (using Vite) to validate a list of Ethereum wallet addresses.

Description

This tool allows users to input multiple Ethereum addresses (either one per line or comma-separated) and validates each address based on standard Ethereum address formats. It provides clear visual feedback for valid and invalid addresses and offers a convenient way to copy only the valid ones.

Features

• Multiple Address Input: Accepts addresses separated by newlines or commas.
• Address Validation:
  • Must start with 0x.
  • Must be exactly 42 characters long.
  • Must contain only hexadecimal characters (0–9, a–f, A–F) after 0x.
• Visual Feedback:
  • Displays ✅ Valid for correctly formatted addresses.
  • Displays ❌ Invalid for incorrectly formatted addresses, highlighting the invalid address text in red.
• Clear Input: A "Clear" button to easily reset the input field and results.
• Copy Valid Addresses:
  • Provides a dedicated section to display only the valid addresses.
  • Offers valid addresses formatted one per line and comma-separated for easy copying.
• Responsive UI: Centered layout for a clean user experience.
• Dummy Data: Pre-fills the input field with example addresses on load for quick testing.

Technologies Used

• React: JavaScript library for building user interfaces.
• Vite: Next-generation frontend tooling for fast development.
• JavaScript (ES6+): Core programming language.
• HTML5: Standard markup language.
• CSS3: Styling the application.

Getting Started

Prerequisites

• Node.js (which includes npm or yarn) installed on your system.

Installation & Running Locally

1. Clone the repository (if applicable, otherwise navigate to your project directory):

   # git clone <your-repository-url>
   # cd <your-project-directory>

2. Install dependencies:

   npm install
   # or
   # yarn install

3. Start the development server:

   npm run dev
   # or
   # yarn dev

   The application will typically be available at http://localhost:5173 (or another port if 5173 is in use).

How to Use

1. Open the application in your web browser.
2. The input field will be pre-filled with example addresses. You can modify these or paste your own list of Ethereum addresses (one per line or comma-separated). For example, you can try pasting the following list:

   0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B
   notAnAddress
   0x12345
   0x742d35Cc6634C0532925a3b844Bc454e4438f44e
   

3. Click the "Validate Addresses" button.
4. The results will be displayed below, indicating whether each address is valid or invalid.
5. If there are valid addresses, a "Valid Addresses" section will appear, allowing you to copy them.
6. Click the "Clear" button to reset the input and results.