How to get Cart Id and Subtotal in sales_order_save_after observer?

Question

I have to call some API on order status complete. For that I need values for the following.

• credit card number (16 digits).
• CVV
• subtotal
• and I have already called an API while place order I need to pass some of the response of that API here.

and my code is below

 public function execute(Observer $observer) {
        $order = $observer->getEvent()->getOrder(); 
        $controller = $observer->getControllerAction();

        if($order->getState() == "complete") 
        { 

           $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
           $cart = $objectManager->create('Magento\Checkout\Model\Cart');
           $payment = $order->getPayment();
           $order_id = $order->getIncrementId();
           $creditCardNumber =  $payment->getCcNumber();
           $CCV = $payment->getCcCid();
           $SubtotalAmount =(double)$cart->getQuote()->getSubtotal();
           $Rate = $_SESSION["rate"];//This is the response of API called on place order.

        }

for the above code my output is

• credit card number = null (if i use getCcLast4() its working, but i want full 16 digits number).
• CVV = null
• subtotal = 0
• and I have already called an API while place order I need to pass some of the response of that API here. = log error.

can any one help me to solve this?

Answer 1

Magento 2 doesn't store customer's credit card number or CCV number.

It's against PCI standards to keep customer credit card info in your database. You can find the reasons why PCI Council restricts this in the post - http://blog.emagicone.com/2015/12/why-credit-cards-can-not-be-charged.html

Edit

I think, cart object is not require because you have $order instance already. So you can get order sub-total by $order->getSubTotal().

public function execute(Observer $observer)
{
    $order = $observer->getEvent()->getOrder();
    $controller = $observer->getControllerAction();

    if ($order->getState() == "complete") {
        /*
        $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
        $cart = $objectManager->create('\Magento\Sales\Model\OrderFactory');
        */
        $payment = $order->getPayment();
        $order_id = $order->getIncrementId();
        $creditCardNumber = $payment->getCcNumber();
        $CCV = $payment->getCcCid();
        /*
        $SubtotalAmount = (double)$cart->getQuote()->getSubtotal();
        */
        $SubtotalAmount = $order->getSubtotal();
        $Rate = $_SESSION["rate"];//This is the response of API called on place order.
    }
}

Answer 2

I Got cart Id in my sales_order_save_after observer using quote Id $order = $observer->getEvent()->getOrder(); CartId = $order->getQuoteId();