Crypto Stats Service

Project Description

This project is a server-side application built using Node.js and MongoDB. It monitors the price, market cap, and 24-hour price change of three cryptocurrencies: Bitcoin, Ethereum, and Matic. The data is fetched from the CoinGecko API every 2 hours and stored in a MongoDB database. The project also includes two APIs: one to fetch the latest data for a requested cryptocurrency, and another to calculate the standard deviation of its price over the last 100 records.

Features

1. Background Job (Task 1)

   • A scheduled background job fetches the current price, market cap, and 24-hour change in USD for Bitcoin, Ethereum, and Matic.
   • This job runs once every 2 hours using node-cron.
   • Data is fetched from the CoinGecko API and stored in a MongoDB database.

2. API to Fetch Latest Data (Task 2)

   • API Endpoint: /api/crypto/stats
   • Query Parameter: coin
   • Example:

     https://crypto-stats-service-backend.onrender.com/api/crypto/stats?coin=bitcoin

   • The API returns the latest price, market cap, and 24-hour change for the requested cryptocurrency.
   • Example Response:

     {
       "price": 40000,
       "marketCap": 800000000,
       "24hChange": 3.4
     }

3. API to Calculate Standard Deviation (Task 3)

   • API Endpoint: /api/crypto/deviation
   • Query Parameter: coin
   • Example:

     https://crypto-stats-service-backend.onrender.com/api/crypto/deviation?coin=bitcoin

   • The API calculates the standard deviation of the price of the requested cryptocurrency based on the last 100 records stored in the database.
   • Example Response:

     {
       "deviation": 4082.48
     }

Setup Instructions

1. Clone the Repository

   git clone https://github.com/jeevan-2005/crypto-stats-service-backend.git

2. Install the dependencies:

   npm install

3. Create a .env file in the root directory and configure the following environment variables:

   PORT=your_port_number
   MONGO_URI=your_mongo_uri

4. Start the development server:

   npm run dev

Tech Stack

• Node.js
• Express.js
• MongoDB (for database management)
• Axios (for API requests)
• Node-cron (for scheduling jobs)

Contributing

Contributions are what make the open source community such an amazing place to be learn, inspire, and create. Any contributions you make are greatly appreciated.