APIv4 changes for Jan 22

We're having the same issue. Other rates are coming through, but media mail is $0.

I may have some time in the next week or two to get a proper patch ready for 7.x, but in the meantime this is the quick fix that I used.

In includes/commerce_usps.xml.inc, function commerce_usps_rate_v4_request:

// Make sure that the package service is registered.
if (!empty($usps_service['machine_name'])) {
  $rate = $package->Postage->Rate;
  $commercial_rate = $package->Postage->CommercialRate;

  $rate = floatval($rate) ? $rate : $commercial_rate;

  $rates[$usps_service['machine_name']] = array(
    'amount' => commerce_currency_decimal_to_amount((string) $rate, commerce_default_currency()),
    'currency_code' => commerce_default_currency(),
    'data' => array(),
  );
}

You can see how 8.x is handling this here: https://git.drupalcode.org/project/commerce_usps/-/blob/8.x-1.x/src/USPS...

I'm guessing a patch for 7.x would need to add a rate_class key to the services in commerce_usps_service_list, and do something similar when handling the response.

This was fixed as a separate issue.