A simple RESTful service implemented using Node.js, Fastify, and PostgreSQL to fetch and serve currency exchange rates.

RESTful API endpoints to retrieve all currencies and individual currency by ID. Automatic updating of currency exchange rates from the National Bank of Kazakhstan. Authentication via bearer token. Written in TypeScript for type safety. Dockerized for easy setup and deployment.

• Node.js
• PostgreSQL
• Docker & Docker Compose (optional)

Setup Environment Variables: Copy the .env.example to .env and update the variables as needed.

Run npm install

Start your PostgreSQL database. Run the application using npm start.

Start both the application and PostgreSQL using docker-compose up.

Run npm run command fetch to fetch and update the currency rates in the database.

Use endpoints:

GET /currencies to fetch all currencies. GET /currency/:id to fetch a specific currency by its ID.

Ensure that the test database is specified in the .env file.

Run npm test.

Access to the API is secured using bearer token authentication. Include your token in the Authorization header of your requests.

curl --location 'http://localhost:3000/currencies' \
--header 'Authorization: Bearer some_secret_key'