I’ve created a customized module utilizing this tutorial that applies a algorithm for accessible fee strategies, based mostly on transport methodology chosen and transport tackle.

<?xml model="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Occasion/and so on/occasions.xsd">
    <occasion title="payment_method_is_active">
        <observer title="custom_payment" occasion="CompanyModuleObserverPaymentMethodAvailable" />
    </occasion>
</config>

Firm/Module/Observer/PaymentMethodAvailable.php

<?php

namespace CompanyModuleObserver;

use MagentoFrameworkEventObserverInterface;


class PaymentMethodAvailable implements ObserverInterface
{
    /**
     * payment_method_is_active occasion handler.
     *
     * @param MagentoFrameworkEventObserver $observer
     */
    public operate execute(MagentoFrameworkEventObserver $observer)
    {
        // you'll be able to substitute "checkmo" together with your required fee methodology code
        if($observer->getEvent()->getMethodInstance()->getCode()=="checkmo"){
            $checkResult = $observer->getEvent()->getResult();
            $checkResult->setData('is_available', false); //that is disabling the fee methodology at checkout web page
        }
    }
}

The issue is that ‘payment_method_is_active’ occasion is dispatched solely when checkout web page is first loaded.

How can I power to set off this occasion for all fee strategies programmatically?

One thing like:

foreach($paymentMethods as $p){
     Mage::dispatchEvent('payment_method_is_active',$args);
}