Currency Exchange

Libraries/Frameworks used

• Frontend: React, TypeScript, Material UI, Socket.io, Jest, React Testing Library.
• Backend : Nestjs, TypeScript, Event-emitter, Mongoose, websockets.
• Database: MongoDB

Running The Application

1. To run locally

1. Download and Install MongoDB on your local machine.
2. Inside the backend directory, run npm install to install the backend dependencies.
3. Obtain a BACKEND_URL_ACCESS_KEY by creating an account on https://coinlayer.com/ a real-time crypto currency exchange api.
4. Create a .env file under backend directory and set the following environment variables:

BACKEND_URL=http://api.coinlayer.com/api
BACKEND_URL_ACCESS_KEY=522df20f7bc454382c04e7f9f042b7ae
DATABASE_URL=mongodb://127.0.0.1:27017/cryptocurrency

Start the nestjs server using npm start. The server will start on http://localhost:3001

Now that the nestjs server is running, bootstrap the frontend:

5. Inside the frontend directory, run npm install to install the frontend dependencies.
6. Create a .env file under frontend directory and set the following environment variables:

REACT_APP_BACKEND_URL=http://localhost:3001

7. Start the frontend dev server using npm start. The server will start on http://localhost:3000

2. To run application using Docker

1. Obtain a BACKEND_URL_ACCESS_KEY by creating an account on https://coinlayer.com/ a real-time crypto currency exchange api.
2. Update the docker-compose.yml file in the root of the project and replace BACKEND_URL_ACCESS_KEY with the obtained key.
3. In the root of the project run docker-compose up --build. The backend will start running on port 3001 and frontend on port 3000. The application can be accessed on http://localhost:3000

Test cases snapshot

Frontend:

Thanks for your time :)