Answers.Body: <p>It seems the const <code>COMMERCE_PAYMENT_CURRENCY</code> isn't checked and set inside Commerce 2 (It was in Commerce 1)</p>
  
  <p>So I created a PR for this issue:</p>
  
  <p><a href="https://github.com/craftcms/commerce/pull/999" rel="nofollow noreferrer">https://github.com/craftcms/commerce/pull/999</a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-09-09T14:30:21.463Z
Answers.LastActivityDate: 2019-09-09T14:30:21.463Z
Answers.UserDisplayName: Jason Mayo
Body: <p>I've just done a Craft 2 > Craft 3 upgrade, and it previously used different locales to change the default currency, depending on the locale.</p>
  
  <p>In Craft 2, I would set <code>COMMERCE_PAYMENT_CURRENCY</code> in my index.php file (<a href="https://docs.craftcms.com/commerce/v2/payment-currencies.html#switching-currencies" rel="nofollow noreferrer">https://docs.craftcms.com/commerce/v2/payment-currencies.html#switching-currencies</a>) so that it would set the currency for that specific site.</p>
  
  <p>But in Commerce 2 this doesn't seem to be working at all.</p>
  
  <p>My current setup is:</p>
  
  <pre><code>/web 
     index.php
     /europe
        index.php
  </code></pre>
  
  <p>And in the <code>/europe/index.php</code> I've got:</p>
  
  <pre><code>&lt;?php
  /**
   * Craft web bootstrap file
   */
  
  // Set path constants
  define('CRAFT_BASE_PATH', dirname(__DIR__, 2));
  define('CRAFT_VENDOR_PATH', CRAFT_BASE_PATH.'/vendor');
  
  define('CRAFT_SITE', 'en_eur');
  
  define('COMMERCE_PAYMENT_CURRENCY', 'EUR');
  
  // Load Composer's autoloader
  require_once CRAFT_VENDOR_PATH.'/autoload.php';
  
  // Load dotenv?
  if (class_exists('Dotenv\Dotenv') &amp;&amp; file_exists(CRAFT_BASE_PATH.'/.env')) {
      Dotenv\Dotenv::create(CRAFT_BASE_PATH)-&gt;load();
  }
  
  // Load and run Craft
  define('CRAFT_ENVIRONMENT', getenv('ENVIRONMENT') ?: 'production');
  $app = require CRAFT_VENDOR_PATH.'/craftcms/cms/bootstrap/web.php';
  $app-&gt;run();
  
  </code></pre>
  
  <p>I know this  file is being picked up when I go to <code>http://website.local/europe</code>, because if I delete the contents, or change the <code>CRAFT_SITE</code> it reacts correctly.</p>
  
  <p>Just not working for Commerce 2.</p>
  
Tags: <plugin-craftcommerce><plugin-craftcommerce2>
Title: Craft 3 / Commerce 2 + Multisite & COMMERCE_PAYMENT_CURRENCY
ThreadText: # Craft 3 / Commerce 2 + Multisite & COMMERCE_PAYMENT_CURRENCY
  
  (Asked by: username_0 on 2019-09-06)
  
  I've just done a Craft 2 > Craft 3 upgrade, and it previously used different locales to change the default currency, depending on the locale.
  
  In Craft 2, I would set `COMMERCE_PAYMENT_CURRENCY` in my index.php file (<https://docs.craftcms.com/commerce/v2/payment-currencies.html#switching-currencies>) so that it would set the currency for that specific site.
  
  But in Commerce 2 this doesn't seem to be working at all.
  
  My current setup is:
  
  ```
  /web 
     index.php
     /europe
        index.php
  
  ```
  
  And in the `/europe/index.php` I've got:
  
  ```
  <?php
  /**
   * Craft web bootstrap file
   */
  
  // Set path constants
  define('CRAFT_BASE_PATH', dirname(__DIR__, 2));
  define('CRAFT_VENDOR_PATH', CRAFT_BASE_PATH.'/vendor');
  
  define('CRAFT_SITE', 'en_eur');
  
  define('COMMERCE_PAYMENT_CURRENCY', 'EUR');
  
  // Load Composer's autoloader
  require_once CRAFT_VENDOR_PATH.'/autoload.php';
  
  // Load dotenv?
  if (class_exists('Dotenv\Dotenv') && file_exists(CRAFT_BASE_PATH.'/.env')) {
      Dotenv\Dotenv::create(CRAFT_BASE_PATH)->load();
  }
  
  // Load and run Craft
  define('CRAFT_ENVIRONMENT', getenv('ENVIRONMENT') ?: 'production');
  $app = require CRAFT_VENDOR_PATH.'/craftcms/cms/bootstrap/web.php';
  $app->run();
  
  ```
  
  I know this file is being picked up when I go to `http://website.local/europe`, because if I delete the contents, or change the `CRAFT_SITE` it reacts correctly.
  
  Just not working for Commerce 2.
  
  **Tags:** plugin-craftcommerce, plugin-craftcommerce2
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2019-09-09. Score: 1 | Accepted answer
  
  It seems the const `COMMERCE_PAYMENT_CURRENCY` isn't checked and set inside Commerce 2 (It was in Commerce 1)
  
  So I created a PR for this issue:
  
  <https://github.com/craftcms/commerce/pull/999>
  
  
  ---
  
  