From e30b12e56bf405689d4712a535f1245b1a7b848f Mon Sep 17 00:00:00 2001
From: Ella Nan <38847123+ellanan@users.noreply.github.com>
Date: Mon, 10 Nov 2025 11:43:20 -0500
Subject: [PATCH] fix: add channel and context tag in AddPromotion request

---
 src/endpoints/cart.js | 10 ++++++----
 src/types/cart.d.ts   |  4 +++-
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/endpoints/cart.js b/src/endpoints/cart.js
index 01559d3..32b45d6 100644
--- a/src/endpoints/cart.js
+++ b/src/endpoints/cart.js
@@ -202,11 +202,13 @@ class CartEndpoint extends BaseExtend {
     })
   }
 
-  AddPromotion(code, token=null, currency = null) {
+  AddPromotion(code, token=null, currency = null, channel = null, contextTag = null) {
 
-    const additionalHeaders = currency
-      ? { 'X-MOLTIN-CURRENCY': currency }
-      : {}
+    const additionalHeaders = {
+      ...(currency && { 'X-MOLTIN-CURRENCY': currency }),
+      ...(channel && { 'EP-Channel': channel }),
+      ...(contextTag && { 'EP-Context-Tag': contextTag })
+    }
 
     return this.request.send(
       `${this.endpoint}/${this.cartId}/items`,
diff --git a/src/types/cart.d.ts b/src/types/cart.d.ts
index b07de4a..14f22a5 100644
--- a/src/types/cart.d.ts
+++ b/src/types/cart.d.ts
@@ -431,8 +431,10 @@ export interface CartEndpoint
    * @param code the promotion code.
    * @param token a customer token to apply customer specific promotions.
    * @param currency the currency to apply the promotion in.
+   * @param channel the channel to apply the promotion in.
+   * @param contextTag the context tag to apply the promotion in.
    */
-  AddPromotion(code: string, token?: string, currency?: string): Promise<CartItemsResponse>
+  AddPromotion(code: string, token?: string, currency?: string, channel?: string, contextTag?: string): Promise<CartItemsResponse>
 
   /**
    * Remove promotion from Cart