How to Block Customers by their Address in Magento 2?

Question

I want a feature in which user will be blocked by their Address.

Like I will add the address in block list of Magento Admin and then user will not be able to purchase anything if I add their address in back-end(block-list) instead of that it shows an error message on checkout page on clicking on next.

Thanks, Any help is appreciated.

Answer 1

Try using observer for sales_order_place_before event

<?php
namespace Vendor\Extension\Observer;

use Magento\Framework\Event\ObserverInterface;

class RestrictOrderObserver implements ObserverInterface
{

  public function execute(\Magento\Framework\Event\Observer $observer)
  {
    $order = $observer->getEvent()->getOrder();

    // If you want to put logic for Billing address then use this one.
    $address = $order->getBillingAddress();

    // If you want to put logic for Shipping address then use this one.
    $address = $order->getShippingAddress();

    //PUT LOGIC OR COMPARISION HERE AND RETURN THE ERROR FROM HERE

  }
}