🚀 CryptoRate Hub

CryptoRate Hub is a web application that displays live cryptocurrency values for popular cryptocurrencies such as Bitcoin (BTC) and Ethereum (ETH) in multiple currencies: USD, LKR, and EUR.

This project was developed as a capstone project using Node.js, Express, Axios, and EJS, demonstrating how to integrate and work with public APIs and present real-time data in a user-friendly interface.

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📌 Features

• Live cryptocurrency prices

• Supported cryptocurrencies:

  • Bitcoin (BTC)
  • Ethereum (ETH)

• Supported currencies:

  • 🇺🇸 USD
  • 🇱🇰 LKR
  • 🇪🇺 EUR

• Real-time currency conversion

• Values rounded to 2 decimal places

• Clean and responsive UI

• Server-side rendering using EJS

• Graceful error handling

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🛠 Technologies Used

• Node.js – Runtime environment
• Express.js – Web framework
• Axios – HTTP client for API requests
• EJS – Templating engine
• CSS – Styling
• Body-parser – Middleware for form handling

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🔗 APIs Used

1️⃣ CoinPaprika API

Used to retrieve real-time cryptocurrency prices.

https://api.coinpaprika.com/v1/tickers

2️⃣ Exchange Rates API

Used to retrieve live exchange rates (EUR as the base currency).

https://exchangeratesapi.io

⚙️ How the Application Works

1. The CoinPaprika API provides cryptocurrency prices in USD.

2. The Exchange Rates API provides EUR-based currency exchange rates.

3. The application calculates:

   • USD → LKR
   • USD → EUR

4. All values are rounded to two decimal places for readability.

5. Data is passed from the Express server to the EJS template and rendered on the homepage.

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▶️ How to Run the Project

1️⃣ Clone the Repository

git clone https://github.com/your-username/crypto-rate-hub.git

2️⃣ Navigate to the Project Directory

cd crypto-rate-hub

3️⃣ Install Dependencies

npm install

4️⃣ Start the Server

nodemon index.js

Or

node index.js

5️⃣ Open in Your Browser

http://localhost:3000

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⚠️ Error Handling

• API requests are wrapped in try-catch blocks
• Prevents crashes when APIs are unavailable
• Ensures smooth user experience even on request failures

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📈 Future Improvements

• Add more cryptocurrencies (SOL, BNB, ADA, etc.)
• Allow users to select cryptocurrencies dynamically
• Add charts to visualize price trends
• Add dark/light mode toggle
• Improve mobile responsiveness
• Move API keys to environment variables

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👨‍💻 Author

Tenath Dilusha Computer Science & Engineering Student

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