Restrict Payment Method based on Shipping Method

I need Cash On Delivery payment method when the customer selects a Store Pick up Shipping method during the checkout process. You can do this using “payment_method_is_active“ event:

Create an events.xml file at:
/app/code/Vendor/Modulename/etc/. Add the following code in this file:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="payment_method_is_active">
        <observer name="codpaymentdisableregion" instance="Vendor\Modulename\Observer\Paymentactive" />
    </event>
</config>

<?xml version="1.0"?>

</event>

</config>

And create Paymentactive.php file at
Vendor/ModuelName/Observer/path. Add the following code in this file:

<?php
namespace Vendor\ModuelName\Observer;

use Magento\Framework\Event\ObserverInterface;

class Paymentactive implements ObserverInterface 
{
    protected $_checkoutSession;

    public function __construct(\Magento\Checkout\Model\Session $checkoutSession) {
        $this->_checkoutSession = $checkoutSession;
    }
    public function execute(\Magento\Framework\Event\Observer $observer) {
        $objectManager = \Magento\Framework\App\ObjectManager::getInstance();

        $_session = $objectManager->get('Magento\Checkout\Model\Session');
        $method = $observer->getEvent()->getMethodInstance();
        $result = $observer->getEvent()->getResult();
        
        
        
        $shippingMethod = $_session->getQuote()->getShippingAddress()->getShippingMethod();
        
        if($_session->getQuote()->getShippingAddress()->getShippingMethod()=='storepickup_storepickup' && $method->getCode()=="cashondelivery")
        {
            return $result->setData('is_available', true);
        }
        
        if(strpos($shippingMethod,'ups_') !== false && $method->getCode()=="paypal_express")
        {
            return $result->setData('is_available', true);
        }
        
        return $result->setData('is_available', false);
    }
}

<?php

namespace Vendor\ModuelName\Observer;

use Magento\Framework\Event\ObserverInterface;

class Paymentactive implements ObserverInterface

{

protected $_checkoutSession;

public function __construct(\Magento\Checkout\Model\Session $checkoutSession) {

$this->_checkoutSession = $checkoutSession;

}

public function execute(\Magento\Framework\Event\Observer $observer) {

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();

$_session = $objectManager->get('Magento\Checkout\Model\Session');

$method = $observer->getEvent()->getMethodInstance();

$result = $observer->getEvent()->getResult();

$shippingMethod = $_session->getQuote()->getShippingAddress()->getShippingMethod();

if($_session->getQuote()->getShippingAddress()->getShippingMethod()=='storepickup_storepickup' && $method->getCode()=="cashondelivery")

{

return $result->setData('is_available', true);

}

if(strpos($shippingMethod,'ups_') !== false && $method->getCode()=="paypal_express")

{

return $result->setData('is_available', true);

}

return $result->setData('is_available', false);

}

You need to replace “storepickup_storepickup” with your shipping code and “cashondelivery” or “ paypal_express” with your payment method code.

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