public void ConvertMoney(int id, string fromCurrency, string toCurrency, decimal amount)
{
var user = Users.FirstOrDefault(x => x.Id == id);
if (user == null)
{
throw new NullReferenceException("User was not found");
}
try
{
if (user.Wallet[fromCurrency.ToUpper()] < amount)
{
throw new NullReferenceException("You don't have enough money!");
}
var exchangeRate = _currencyConverterService.GetExchangeRate(fromCurrency, toCurrency, amount);
user.Wallet[fromCurrency.ToUpper()] -= amount;
user.Wallet[toCurrency.ToUpper()] += exchangeRate;
}
catch
{
throw new NullReferenceException("Сonversion failed");
}
}
