public string RefillBalance(int customerId, decimal moneyAmount)
{
Result <MoneyToCharge> moneyToCharge = MoneyToCharge.Create(moneyAmount);
Result <CustomerManagement> customer = _database.GetById(customerId).ToResult("Customer is not found");
return(Result.Combine(moneyToCharge, customer)
.OnSuccess(() => customer.value.AddBalance(moneyToCharge.value))
.OnSuccess(() => _paymentGateway.ChargePayment(customer.value.BillingInfo, moneyToCharge.value))
.OnSuccess(
() => _database.Save(customer.value)
.OnFailure(() => _paymentGateway.RollbackLastTransaction()))
.OnBoth(result => Log(result))
.OnBoth(result => result.isSuccues ? "OK" : result.Error));
}