Best way to get shipping method being used?

[DavidAnderson684]

When the woocommerce_store_api_cart_errors action is called (by CartController::validate_cart(), in response to various cart-page actions), what is the best way to discover which is the current shipping method? (In PHP code that is run by that action, that is).

Related to this, I note that the JSON response to actions that call this method (e.g. /wc/store/v1/cart/remove-coupon) includes a shipping calculation, but that response does not indicate which method was used to make the calculation.

Having looked over the code, I think that the answer is likely that it's with wc()->session->get( 'chosen_shipping_methods' ); ? It'd be helpful to have that confirmed or a pointer to any relevant documentation, though (I searched but didn't find any).

Thank you!

[opr]

Having looked over the code, I think that the answer is likely that it's with wc()->session->get( 'chosen_shipping_methods' );

Yep, this is correct!

Related to this, I note that the JSON response to actions that call this method (e.g. /wc/store/v1/cart/remove-coupon) includes a shipping calculation, but that response does not indicate which method was used to make the calculation.

In the response to store API requests you can see which method is selected by the selected property on the shipping methods (check the second item in shipping_rates):

[
  {
    "package_id": 0,
    "name": "Shipment 1",
    "destination": {
      "address_1": "123 Fake Street",
      "address_2": "Testland",
      "city": "Chicago",
      "state": "IL",
      "postcode": "60629",
      "country": "US"
    },
    "items": [
      {
        "key": "758874998f5bd0c393da094e1967a72b",
        "name": "XSS",
        "quantity": 1
      }
    ],
    "shipping_rates": [
      {
        "rate_id": "free_shipping:1",
        "name": "Free shipping",
        "description": "",
        "delivery_time": "",
        "price": "0",
        "taxes": "0",
        "instance_id": 1,
        "method_id": "free_shipping",
        "meta_data": [
          {
            "key": "Items",
            "value": "XSS × 1"
          }
        ],
        "selected": false,
        "currency_code": "GBP",
        "currency_symbol": "£",
        "currency_minor_unit": 2,
        "currency_decimal_separator": ".",
        "currency_thousand_separator": ",",
        "currency_prefix": "£",
        "currency_suffix": ""
      },
      {
        "rate_id": "flat_rate:2",
        "name": "Flat rate",
        "description": "",
        "delivery_time": "",
        "price": "700",
        "taxes": "0",
        "instance_id": 2,
        "method_id": "flat_rate",
        "meta_data": [
          {
            "key": "Items",
            "value": "XSS × 1"
          }
        ],
        "selected": true,
        "currency_code": "GBP",
        "currency_symbol": "£",
        "currency_minor_unit": 2,
        "currency_decimal_separator": ".",
        "currency_thousand_separator": ",",
        "currency_prefix": "£",
        "currency_suffix": ""
      },
    ]
  }
]

Hope this helps!

[DavidAnderson684]

Thank you!