acquia_commercemanager-8.x-1.122/modules/acm_checkout/acm_checkout.install

<?php

/**
 * @file
 * Contains install hooks for acm_checkout.
 */

use Drupal\user\Entity\Role;

/**
 * Implements hook_install().
 */
function acm_checkout_install() {
  $role = Role::load('anonymous');
  $role->grantPermission('access checkout');
  $role->save();

  $role = Role::load('authenticated');
  $role->grantPermission('access checkout');
  $role->save();
}