Merge pull request #25 from grininc/bug/TS-413/magento-string-discoun…

…t-amount

TS-413: some plugins apparently are having the magento extension libr…

Block/Checkout/Success.php

@@ -101,6 +101,8 @@ public function getOrderId(): string
     public function getSubtotal()
     {
         $order = $this->getOrder();
-        return $order->getBaseSubtotal() - abs($order->getDiscountAmount() ?: 0);
+
+        // float added to type cast from string as some plugins were writing strings of the values.
+        return $order->getBaseSubtotal() - abs((float)$order->getDiscountAmount() ?: 0);
     }
 }