Created config setting to send Cart & Purchase data in base currency …

Config/Config.php

@@ -229,6 +229,16 @@ public function getOrderStatesForPurchaseEvent(): array
         return explode(',', (string)$this->getModuleConfigValue('order_states_for_purchase_event'));
     }
 
+    /**
+     * Check whether to use base currency for purchase data
+     *
+     * @return bool
+     */
+    public function useBaseCurrency(): bool
+    {
+        return (bool)$this->getModuleConfigValue('use_base_currency', false);
+    }
+
     /**
      * Return a configuration value
      *

DataLayer/Event/Purchase.php

@@ -49,14 +49,22 @@ public function get(): array
             return [];
         }
 
+        $currencyCode = $this->config->useBaseCurrency()
+            ? $order->getBaseCurrencyCode()
+            : $order->getOrderCurrencyCode();
+
+        $taxAmount = $this->config->useBaseCurrency()
+            ? (float)$order->getBaseTaxAmount()
+            : (float)$order->getTaxAmount();
+
         return [
             'event' => 'purchase',
             'ecommerce' => [
                 'transaction_id' => $order->getIncrementId(),
                 'affiliation' => $this->config->getStoreName(),
-                'currency' => $order->getOrderCurrencyCode(),
+                'currency' => $currencyCode,
                 'value' => $this->priceFormatter->format($this->orderTotals->getValueTotal($order)),
-                'tax' => $this->priceFormatter->format((float)$order->getTaxAmount()),
+                'tax' => $this->priceFormatter->format($taxAmount),
                 'shipping' => $this->priceFormatter->format($this->orderTotals->getShippingTotal($order)),
                 'coupon' => $order->getCouponCode(),
                 'payment_method' => $order->getPayment() ? $order->getPayment()->getMethod() : '',

Util/OrderTotals.php

@@ -4,16 +4,32 @@
 namespace Yireo\GoogleTagManager2\Util;
 
 use Magento\Sales\Api\Data\OrderInterface;
+use Yireo\GoogleTagManager2\Config\Config;
 
 class OrderTotals
 {
+    private Config $config;
+
+    public function __construct(Config $config)
+    {
+        $this->config = $config;
+    }
+
     public function getValueTotal(OrderInterface $order): float
     {
+        if ($this->config->useBaseCurrency()) {
+            return (float)$order->getBaseSubtotal() - abs((float)$order->getBaseDiscountAmount());
+        }
+
         return (float)$order->getSubtotal() - abs((float)$order->getDiscountAmount());
     }
 
     public function getShippingTotal(OrderInterface $order): float
     {
+        if ($this->config->useBaseCurrency()) {
+            return (float)$order->getBaseShippingAmount() - (float)$order->getBaseShippingDiscountAmount();
+        }
+
         return (float)$order->getShippingAmount() - (float)$order->getShippingDiscountAmount();
     }
 }

etc/adminhtml/system.xml

@@ -135,6 +135,14 @@
                         <field id="serverside_enabled">1</field>
                     </depends>
                 </field>
+                <field id="use_base_currency" type="select" translate="label" sortOrder="33" showInDefault="1" showInWebsite="1" showInStore="1">
+                    <label>Send Quote and Purchase data in base currency</label>
+                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
+                    <comment>If enabled, purchase data will be sent in base currency. If disabled, purchase data will be sent in store currency.</comment>
+                    <depends>
+                        <field id="enabled">1</field>
+                    </depends>
+                </field>
             </group>
         </section>
     </system>

etc/config.xml

@@ -17,6 +17,7 @@
                 <serverside_enabled>0</serverside_enabled>
                 <serverside_gtm_url/>
                 <order_states_for_purchase_event>new,payment_review,pending_payment,holded,processing,complete</order_states_for_purchase_event>
+                <use_base_currency>0</use_base_currency>
             </settings>
         </googletagmanager2>
     </default>