import requests

BASE_URL = "https://api.frankfurter.app"

def get_latest_rate(from_currency, to_currency):
    """
    Fetch the latest conversion rate from Frankfurter API.
    
    Args:
        from_currency: Currency code to convert from.
        to_currency: Currency code to convert to.
    
    Returns:
        The latest conversion rate.
    """
    response = requests.get(f"{BASE_URL}/latest?from={from_currency}&to={to_currency}")
    if response.status_code == 200:
        data = response.json()
        return data['rates'][to_currency]
    else:
        raise Exception("Failed to fetch the latest rate")

def get_historical_rate(from_currency, to_currency, date):
    """
    Fetch the historical conversion rate for a specific date from Frankfurter API.
    
    Args:
        from_currency: Currency code to convert from.
        to_currency: Currency code to convert to.
        date: Date for which to fetch the rate (in YYYY-MM-DD format).
    
    Returns:
        The historical conversion rate.
    """
    response = requests.get(f"{BASE_URL}/{date}?from={from_currency}&to={to_currency}")
    if response.status_code == 200:
        data = response.json()
        return data['rates'][to_currency]
    else:
        raise Exception("Failed to fetch historical rate")