public Task <bool> Vend(CashCard cashCard, int PinNumber)
{
var isVendingSuccess = false;
// No point proceeding if PIN is incorrect
if (_cardManager.IsAuthorised(cashCard, PinNumber))
{
var isVendingPossible = _inventoryManager.IsVendingPossible();
var doesAccHaveBalance = _accountManager.DoesAccountHaveBalance(cashCard);
if (isVendingPossible.Result && doesAccHaveBalance.Result)
{
var updateAccount = _accountManager.UpdateAccount(cashCard);
var updateInventory = _inventoryManager.UpdateInventory();
if (updateAccount && updateInventory)
{
isVendingSuccess = true;
}
}
}
return(Task.FromResult <bool>(isVendingSuccess));
}
