public double pay(BillingPayRequest billingPay)
{
Customer customer = OnmemoryDataBase.findCustomerById(billingPay.customerId);
customer.balance = customer.balance - billingPay.amount;
Console.WriteLine($"Pago aplicado al cliente: {customer.name} ," +
$"El nuevo saldo es {customer.balance}");
return(customer.balance);//new Balance
}
public Customer findCustomer(long customerId)
{
return(OnmemoryDataBase.findCustomerById(customerId));
}
public double queryCustomerBalance(long customerId)
{
Customer customer = OnmemoryDataBase.findCustomerById(customerId);
return(customer.balance);
}