This is a API built with FastAPI and SQLAlchemy for managing currency exchange rates.

• Update Exchange Rates: Endpoint to fetch the latest exchange rates from an external API and update the database.
• Last Update: Endpoint to retrieve the timestamp of the last update of exchange rates in the database.
• Currency Conversion: Endpoint to convert an amount from one currency to another based on the latest exchange rates.

• URL: /update_rates
• Method: GET
• Description: Fetches the latest exchange rates from an external API and updates the database.
• Response: Returns a JSON message indicating the success of the update.

• URL: /last_update
• Method: GET
• Description: Retrieves the timestamp of the last update of exchange rates in the database.
• Response: Returns a JSON object containing the timestamp of the last update.

• URL: /convert
• Method: POST
• Description: Converts an amount from one currency to another based on the latest exchange rates.
• Request Body:
  • source_currency: The currency code of the source currency.
  • target_currency: The currency code of the target currency.
  • amount: The amount to convert.
• Response: Returns a JSON object containing the converted amount.

1. Clone the repository.
2. Navigate to the project directory.
3. Build the Docker containers using docker-compose -f docker-compose.yml up --build -d.
4. Once the containers are running, the API will be accessible at http://localhost:8000.

• FastAPI: Web framework for building APIs with Python.
• SQLAlchemy: SQL toolkit and Object-Relational Mapping (ORM) for Python.
• httpx: Asynchronous HTTP client for making requests to external APIs.
• pydantic: Data validation and settings management using Python type annotations.
• PostgreSQL: Database management system for storing currency exchange data.

• DATABASE_URL: Connection URL for the PostgreSQL database.

1. Use the /update_rates endpoint to fetch and update the latest exchange rates.
2. Convert currency using the /convert endpoint by providing the source currency, target currency, and amount.
3. Retrieve the timestamp of the last update using the /last_update endpoint.

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