From 3aec65205c7bf2a91d96ea536afc449f030fc787 Mon Sep 17 00:00:00 2001
From: Tomas Saghy <tomas.saghy@riesenia.com>
Date: Fri, 1 Jul 2022 23:27:54 +0200
Subject: [PATCH] add rounding

---
 src/Cart.php | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/Cart.php b/src/Cart.php
index 2a82e1f..f71b96b 100644
--- a/src/Cart.php
+++ b/src/Cart.php
@@ -61,6 +61,12 @@ class Cart
      */
     protected $_cartModifiedCallback = true;
 
+    /** @var callable|null */
+    protected $totalRounding;
+
+    /** @var Decimal */
+    protected $roundingAmount;
+
     /**
      * Constructor.
      *
@@ -557,9 +563,25 @@ public function getTotal($type = '~')
             $total = $total->add($item);
         }
 
+        if (\is_callable($this->totalRounding)) {
+            $newTotal = \call_user_func($this->totalRounding, $total);
+            $this->roundingAmount = $newTotal->sub($total);
+            $total = $newTotal;
+        }
+
         return $total;
     }
 
+    /**
+     * @param callable|string $type
+     */
+    public function getRoundingAmount($type = '~'): Decimal
+    {
+        $this->getTotal($type);
+
+        return $this->roundingAmount;
+    }
+
     /**
      * Get taxes.
      *