Magento 2: How to show/hide payment method on basis of amount

Question

I'm using Magento 2 CE Version 2.1.0.

I have 2 payment method Paypal Express Checkout & Bank Transfer.

When the amount is greater than X then Paypal should not be displayed only Bank Transfer.

I have configured that variable on admin side on system.xml for X amount.

By referring to Magento 2 : How do we add zipcode validation on COD payment method? as per @Ashish suggestion.

I have below code now

app\code\Custom\Module\etc\frontend\di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../../lib/internal/Magento/Framework/ObjectManager/etc/config.xsd">
<type name="Magento\Paypal\Model\Express">
        <plugin sortOrder="1" name="restrictByCustomer" type="Custom\Module\Plugin\Payment\Method\Paypal\Available"/>
</type>

app\code\Custom\Module\Plugin\Payment\Method\Paypal\Available.php

namespace Custom\Module\Plugin\Payment\Method\Paypal;

use Magento\Customer\Model\Session as CustomerSession;
use Magento\Backend\Model\Auth\Session as BackendSession;
use Magento\Paypal\Model\Express;
use Magento\Store\Model\ScopeInterface;
use Magento\Framework\App\Config\ScopeConfigInterface;
use Magento\Checkout\Model\Cart;

class Available {

    /**
     * @var CustomerSession
     */
    protected $customerSession;

    /**
     * @var BackendSession
     */
    protected $backendSession;

    /**
     * @param CustomerSession $customerSession
     * @param BackendSession $backendSession
     */
    public function __construct(
    CustomerSession $customerSession, BackendSession $backendSession, ScopeConfigInterface $scopeConfig, Cart $cart
    ) {
        $this->customerSession = $customerSession;
        $this->backendSession = $backendSession;
        $this->scopeConfig = $scopeConfig;
        $this->cart = $cart;
    }

    /**
     *
     * @param Paypal Express $subject
     * @param $result
     * @return bool
     * @throws \Magento\Framework\Exception\LocalizedException
     */
    public function afterIsAvailable(Express $subject, $result) {

        // Do not remove payment method for admin
        if ($this->backendSession->isLoggedIn()) {
            return $result;
        }

        $cartQuote = $this->cart->getQuote()->getData();
        $cartGrandTotal = $cartQuote['base_grand_total'];

        list($grandTotal, $decimals) = explode(".", $cartQuote['base_grand_total']);
        $papalMaxShowLimit = $this->scopeConfig->getValue('mygeneral/settings/paypal_show_amount', ScopeInterface::SCOPE_STORE);

        if ($grandTotal > $papalMaxShowLimit) {
            return false;
        } else {
            return true;
        }
    }
}

I have put all condition. But on return false it's not hiding Paypal Express Checkout Method.

[Update] I'm not able select Paypal Payment Method's Radio Button On Checkout Page. It's not hiding it completely.

Answer 1

app/code/Vendor/Module/etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\Paypal\Model\Express" type="Vendor\Module\Model\Express" />
</config>

app/code/Vendor/Module/Model/Express.php

namespace Vendor\Module\Model;

class Express extends \Magento\Paypal\Model\Express 
{

    public function isAvailable(\Magento\Quote\Api\Data\CartInterface $quote = null)
    {
    ...........Write your own logic here and reture true/false on basis of ................     
    return false;
    }
}

Answer 2

You can use this to resolve this :

Magento 2 : How do we add zipcode validation on COD payment method?

in this example just replace the class Cashondelivery with your payment method class on which you want to add filter.

In this example

public function afterIsAvailable(Cashondelivery $subject, $result)
{
// Do not remove payment method for admin
if ($this->backendSession->isLoggedIn()) {
    return $result;
}
   ......return true/false according to your condition.......

return true/false;

}

Answer 3

Finally, I have solved by overiding Paypal Express Model

In you di.xml file

<preference for="Magento\Paypal\Model\Express" type="Custom\Module\Model\Express" />

In Your app\code\Custom\Module\Model\Express.php

namespace Custom\Module\Model;

class Express extends \Magento\Paypal\Model\Express {

    public function isAvailable(\Magento\Quote\Api\Data\CartInterface $quote = null) {

        $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
        $cart = $objectManager->get('Magento\Checkout\Model\Cart');
        $scopeConfig = $objectManager->get('Magento\Framework\App\Config\ScopeConfigInterface');

        if (isset($cart)) {
            $grandTotal = $cart->getQuote()->getGrandTotal();
            if (!empty($grandTotal)) {
                list($grandTotal, $decimals) = explode(".", $grandTotal);

                if ($grandTotal > XXXX) { #Replace XXXX with Amount Say 1000/10
                    return false;
                } else {
                    return true;
                }
            } else {
                return true;
            }
        }
        return true;
    }
}