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Estimate shipping methods

Estimate shipping methods

I would like to know where the function is for :



I found no function is called when postcode on cart is changed?


Re: Estimate shipping methods

Hello @tvgarden


There is define into webapi.xml file



<route url="/V1/carts/:cartId/estimate-shipping-methods" method="POST">
        <service class="Magento\Quote\Api\ShipmentEstimationInterface" method="estimateByExtendedAddress"/>
            <resource ref="Magento_Cart::manage" />
    <route url="/V1/carts/:cartId/estimate-shipping-methods-by-address-id" method="POST">
        <service class="Magento\Quote\Api\ShippingMethodManagementInterface" method="estimateByAddressId"/>
            <resource ref="Magento_Cart::manage" />

From there you can find Interface name and you can find which class implement that you need to check in di.xml file


<preference for="Magento\Quote\Api\ShipmentEstimationInterface" type="Magento\Quote\Model\ShippingMethodManagement" />

So you need to find 

Magento\Quote\Model\ShippingMethodManagement.php with
estimateByAddressId or
estimateByExtendedAddress method from that class

Hope it will help you.




Re: Estimate shipping methods

Thanks, that's helpful.


However I need to find a function in front-end.

Which is calling    post: in storage.js ?

Re: Estimate shipping methods

You can find post function inside storage.js from magento2-base module.

Full path for post function is,


Open this file and you can check post function with below value,

  * Perform asynchronous POST request to server.
         * @param {String} url
         * @param {String} data
         * @param {Boolean} global
         * @param {String} contentType
         * @returns {Deferred}
        post: function (url, data, global, contentType) {
            global = global === undefined ? true : global;
            contentType = contentType || 'application/json';

            return $.ajax({
                type: 'POST',
                data: data,
                global: global,
                contentType: contentType
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