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In shipping carrier class, there's a method to validate additional rules proccessAdditionalValidation, searching for that method in the code base will reveal processAdditionalValidation (less than 1 'c'). Then continue searching with that will lead collectCarrierRates So in my opinion, there will be 2 approaches for this: Extend the current Carrier, add ...


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I haven't done something similar but as I checked the code right now, you can create an after Plugin for this method \Magento\Shipping\Model\CarrierFactory::createIfActive or also this method \Magento\Shipping\Model\Shipping::isShippingCarrierAvailable, there you can add your validation and return true or false for the shipping method you allow or not. ...


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The best way to get current website id of selected website in admin panel <?php namespace Vendor\Namespace\Controller\Index; class Index { protected $state; public function __construct( \Magento\Framework\App\RequestInterface $request, \Magento\Framework\App\State $state ){ $this->request = $request; $...


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