fix(utils): Fix on precision for high quantities for items when promotion is applied (#13131)

* Fix on precision for high quantities for items when promotion is applied

* Fix on precision for high quantities for items when promotion is applied

packages/core/utils/src/totals/promotion/index.ts

@@ -6,7 +6,10 @@ import {
 import { MathBN } from "../math"
 
 function getPromotionValueForPercentage(promotion, lineItemAmount) {
-  return MathBN.mult(MathBN.div(promotion.value, 100), lineItemAmount)
+  return MathBN.convert(
+    MathBN.mult(MathBN.div(promotion.value, 100), lineItemAmount),
+    2
+  )
 }
 
 function getPromotionValueForFixed(promotion, lineItemAmount, lineItemsAmount) {
@@ -25,10 +28,10 @@ function getPromotionValueForFixed(promotion, lineItemAmount, lineItemsAmount) {
       promotionValueForItem
     )
 
-    return MathBN.mult(
-      promotionValueForItem,
-      MathBN.div(percentage, 100)
-    ).precision(4)
+    return MathBN.convert(
+      MathBN.mult(promotionValueForItem, MathBN.div(percentage, 100)),
+      2
+    )
   }
   return promotion.value
 }