diff --git a/erpnext/accounts/doctype/coupon_code/__init__.py b/erpnext/accounts/doctype/coupon_code/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/erpnext/accounts/doctype/coupon_code/__init__.py
diff --git a/erpnext/accounts/doctype/coupon_code/coupon_code.js b/erpnext/accounts/doctype/coupon_code/coupon_code.js
new file mode 100644
index 0000000..0bf097f
--- /dev/null
+++ b/erpnext/accounts/doctype/coupon_code/coupon_code.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2018, Frappe Technologies Pvt. Ltd. and contributors
+// For license information, please see license.txt
+
+frappe.ui.form.on('Coupon Code', {
+	coupon_name:function(frm){
+		if (frm.doc.__islocal===1) {
+			frm.trigger("make_coupon_code");
+		}
+	},
+	coupon_type:function(frm){
+		if (frm.doc.__islocal===1) {
+			frm.trigger("make_coupon_code");
+		}
+	},
+	make_coupon_code: function(frm) {
+		var coupon_name=frm.doc.coupon_name;
+		var coupon_code;
+		if (frm.doc.coupon_type=='Gift Card') {
+			coupon_code=Math.random().toString(12).substring(2, 12).toUpperCase();
+		}
+		else if(frm.doc.coupon_type=='Promotional'){
+			coupon_name=coupon_name.replace(/\s/g,'');
+			coupon_code=coupon_name.toUpperCase().slice(0,8);
+		}
+		frm.doc.coupon_code=coupon_code;
+		frm.refresh_field('coupon_code');
+	},
+	refresh: function(frm) {
+		if (frm.doc.pricing_rule) {
+			frm.add_custom_button(__("Add/Edit Coupon Conditions"), function(){
+				frappe.set_route("Form", "Pricing Rule", frm.doc.pricing_rule);
+			});
+		}
+	}
+});
diff --git a/erpnext/accounts/doctype/coupon_code/coupon_code.json b/erpnext/accounts/doctype/coupon_code/coupon_code.json
new file mode 100644
index 0000000..ba5df78
--- /dev/null
+++ b/erpnext/accounts/doctype/coupon_code/coupon_code.json
@@ -0,0 +1,182 @@
+{
+ "allow_import": 1,
+ "autoname": "field:coupon_name",
+ "creation": "2018-01-22 14:34:39.701832",
+ "doctype": "DocType",
+ "document_type": "Other",
+ "editable_grid": 1,
+ "engine": "InnoDB",
+ "field_order": [
+  "coupon_name",
+  "coupon_type",
+  "customer",
+  "column_break_4",
+  "coupon_code",
+  "price_list",
+  "pricing_rule",
+  "uses",
+  "valid_from",
+  "valid_upto",
+  "maximum_use",
+  "used",
+  "column_break_11",
+  "description",
+  "amended_from"
+ ],
+ "fields": [
+  {
+   "fieldname": "coupon_name",
+   "fieldtype": "Data",
+   "label": "Coupon Name",
+   "reqd": 1,
+   "unique": 1
+  },
+  {
+   "fieldname": "coupon_type",
+   "fieldtype": "Select",
+   "in_list_view": 1,
+   "label": "Coupon Type",
+   "options": "Promotional\nGift Card",
+   "reqd": 1
+  },
+  {
+   "depends_on": "eval: doc.coupon_type == \"Gift Card\"",
+   "fieldname": "customer",
+   "fieldtype": "Link",
+   "label": "Customer",
+   "options": "Customer"
+  },
+  {
+   "fieldname": "column_break_4",
+   "fieldtype": "Column Break"
+  },
+  {
+   "description": "To be used to get discount",
+   "fieldname": "coupon_code",
+   "fieldtype": "Data",
+   "label": "Coupon Code",
+   "no_copy": 1,
+   "set_only_once": 1,
+   "unique": 1
+  },
+  {
+   "fieldname": "price_list",
+   "fieldtype": "Link",
+   "label": "Price List",
+   "options": "Price List"
+  },
+  {
+   "fieldname": "pricing_rule",
+   "fieldtype": "Link",
+   "label": "Pricing Rule",
+   "options": "Pricing Rule"
+  },
+  {
+   "fieldname": "uses",
+   "fieldtype": "Section Break",
+   "label": "Uses"
+  },
+  {
+   "fieldname": "valid_from",
+   "fieldtype": "Date",
+   "in_list_view": 1,
+   "label": "Valid From"
+  },
+  {
+   "fieldname": "valid_upto",
+   "fieldtype": "Date",
+   "label": "Valid Upto"
+  },
+  {
+   "depends_on": "eval: doc.coupon_type == \"Promotional\"",
+   "fieldname": "maximum_use",
+   "fieldtype": "Int",
+   "label": "Maximum Use"
+  },
+  {
+   "default": "0",
+   "fieldname": "used",
+   "fieldtype": "Int",
+   "label": "Used",
+   "no_copy": 1,
+   "read_only": 1
+  },
+  {
+   "fieldname": "column_break_11",
+   "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "description",
+   "fieldtype": "Text Editor",
+   "label": "Coupon Description"
+  },
+  {
+   "fieldname": "amended_from",
+   "fieldtype": "Link",
+   "label": "Amended From",
+   "no_copy": 1,
+   "options": "Coupon Code",
+   "print_hide": 1,
+   "read_only": 1
+  }
+ ],
+ "modified": "2019-05-28 21:06:29.395619",
+ "modified_by": "Administrator",
+ "module": "Accounts",
+ "name": "Coupon Code",
+ "owner": "Administrator",
+ "permissions": [
+  {
+   "create": 1,
+   "delete": 1,
+   "email": 1,
+   "export": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "System Manager",
+   "share": 1,
+   "write": 1
+  },
+  {
+   "create": 1,
+   "delete": 1,
+   "email": 1,
+   "export": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "Accounts User",
+   "share": 1,
+   "write": 1
+  },
+  {
+   "create": 1,
+   "delete": 1,
+   "email": 1,
+   "export": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "Sales Manager",
+   "share": 1,
+   "write": 1
+  },
+  {
+   "create": 1,
+   "delete": 1,
+   "email": 1,
+   "export": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "Website Manager",
+   "share": 1,
+   "write": 1
+  }
+ ],
+ "sort_field": "modified",
+ "sort_order": "DESC",
+ "title_field": "coupon_name",
+ "track_changes": 1
+}
\ No newline at end of file
diff --git a/erpnext/accounts/doctype/coupon_code/coupon_code.py b/erpnext/accounts/doctype/coupon_code/coupon_code.py
new file mode 100644
index 0000000..7829c93
--- /dev/null
+++ b/erpnext/accounts/doctype/coupon_code/coupon_code.py
@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2018, Frappe Technologies Pvt. Ltd. and contributors
+# For license information, please see license.txt
+
+from __future__ import unicode_literals
+import frappe
+from frappe import _
+from frappe.model.document import Document
+from frappe.utils import (strip)
+class CouponCode(Document):
+	def autoname(self):
+		self.coupon_name = strip(self.coupon_name)
+		self.name = self.coupon_name
+
+		if not self.coupon_code:
+			if self.coupon_type == "Promotional":
+				self.coupon_code =''.join([i for i in self.coupon_name if not i.isdigit()])[0:8].upper()
+			elif self.coupon_type == "Gift Card":
+				self.coupon_code = frappe.generate_hash()[:10].upper()
+		
+	def validate(self):
+		if self.coupon_type == "Gift Card":
+			self.maximum_use = 1
+			if not self.customer:
+				frappe.throw(_("Please select the customer."))
diff --git a/erpnext/accounts/doctype/coupon_code/test_coupon_code.js b/erpnext/accounts/doctype/coupon_code/test_coupon_code.js
new file mode 100644
index 0000000..460fedc
--- /dev/null
+++ b/erpnext/accounts/doctype/coupon_code/test_coupon_code.js
@@ -0,0 +1,23 @@
+/* eslint-disable */
+// rename this file from _test_[name] to test_[name] to activate
+// and remove above this line
+
+QUnit.test("test: Coupon Code", function (assert) {
+	let done = assert.async();
+
+	// number of asserts
+	assert.expect(1);
+
+	frappe.run_serially([
+		// insert a new Coupon Code
+		() => frappe.tests.make('Coupon Code', [
+			// values to be set
+			{key: 'value'}
+		]),
+		() => {
+			assert.equal(cur_frm.doc.key, 'value');
+		},
+		() => done()
+	]);
+
+});
diff --git a/erpnext/accounts/doctype/coupon_code/test_coupon_code.py b/erpnext/accounts/doctype/coupon_code/test_coupon_code.py
new file mode 100644
index 0000000..92744e4
--- /dev/null
+++ b/erpnext/accounts/doctype/coupon_code/test_coupon_code.py
@@ -0,0 +1,133 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2018, Frappe Technologies Pvt. Ltd. and Contributors
+# See license.txt
+from __future__ import unicode_literals
+
+import frappe
+import unittest
+from erpnext.selling.doctype.sales_order.test_sales_order import make_sales_order
+from erpnext.stock.get_item_details import get_item_details
+from frappe.test_runner import make_test_objects
+
+def test_create_test_data():
+	frappe.set_user("Administrator")
+	# create test item
+	if not frappe.db.exists("Item","_Test Tesla Car"):
+		item = frappe.get_doc({
+		"description": "_Test Tesla Car",
+		"doctype": "Item",
+		"has_batch_no": 0,
+		"has_serial_no": 0,
+		"inspection_required": 0,
+		"is_stock_item": 1,
+		"opening_stock":100,
+		"is_sub_contracted_item": 0,
+		"item_code": "_Test Tesla Car",
+		"item_group": "_Test Item Group",
+		"item_name": "_Test Tesla Car",
+		"apply_warehouse_wise_reorder_level": 0,
+		"warehouse":"_Test Warehouse - _TC",
+		"gst_hsn_code": "999800",
+		"valuation_rate": 5000,
+		"standard_rate":5000,
+		"item_defaults": [{
+		"company": "_Test Company",
+		"default_warehouse": "_Test Warehouse - _TC",
+		"default_price_list":"_Test Price List",
+		"expense_account": "_Test Account Cost for Goods Sold - _TC",
+		"buying_cost_center": "_Test Cost Center - _TC",
+		"selling_cost_center": "_Test Cost Center - _TC",
+		"income_account": "Sales - _TC"
+		}],
+		"show_in_website": 1,
+		"route":"-test-tesla-car",
+		"website_warehouse": "_Test Warehouse - _TC"
+		})
+		item.insert()
+	# create test item price
+	item_price = frappe.get_list('Item Price', filters={'item_code': '_Test Tesla Car', 'price_list': '_Test Price List'}, fields=['name'])
+	if len(item_price)==0:
+		item_price = frappe.get_doc({
+			"doctype": "Item Price",
+			"item_code": "_Test Tesla Car",
+			"price_list": "_Test Price List",
+			"price_list_rate": 5000
+		})
+		item_price.insert()
+	# create test item pricing rule
+	if not frappe.db.exists("Pricing Rule","_Test Pricing Rule for _Test Item"):
+		item_pricing_rule = frappe.get_doc({
+		"doctype": "Pricing Rule",
+		"title": "_Test Pricing Rule for _Test Item",
+		"apply_on": "Item Code",
+		"items": [{
+			"item_code": "_Test Tesla Car"
+		}],
+		"warehouse":"_Test Warehouse - _TC",
+		"coupon_code_based":1,
+		"selling": 1,
+		"rate_or_discount": "Discount Percentage",
+		"discount_percentage": 30,
+		"company": "_Test Company",
+		"currency":"INR",
+		"for_price_list":"_Test Price List"
+		})
+		item_pricing_rule.insert()
+	# create test item sales partner
+	if not frappe.db.exists("Sales Partner","_Test Coupon Partner"):
+		sales_partner = frappe.get_doc({
+		"doctype": "Sales Partner",
+		"partner_name":"_Test Coupon Partner",
+		"commission_rate":2,
+		"referral_code": "COPART"
+		})
+		sales_partner.insert()
+	# create test item coupon code
+	if not frappe.db.exists("Coupon Code","SAVE30"):
+		coupon_code = frappe.get_doc({
+		"doctype": "Coupon Code",
+		"coupon_name":"SAVE30",
+		"coupon_code":"SAVE30",
+		"price_list": "_Test Price List",
+		"pricing_rule": "_Test Pricing Rule for _Test Item",
+		"valid_from": "2014-01-01",
+		"maximum_use":1,
+		"used":0
+		})
+		coupon_code.insert()
+
+
+class TestCouponCode(unittest.TestCase):
+	def setUp(self):
+		test_create_test_data()
+
+	def tearDown(self):
+		frappe.set_user("Administrator")
+
+	def test_1_check_coupon_code_used_before_so(self):
+		coupon_code = frappe.get_doc("Coupon Code", frappe.db.get_value("Coupon Code", {"coupon_name":"SAVE30"}))
+		# reset used coupon code count
+		coupon_code.used=0
+		coupon_code.save()
+		# check no coupon code is used before sales order is made
+		self.assertEqual(coupon_code.get("used"),0)
+
+	def test_2_sales_order_with_coupon_code(self):
+		so = make_sales_order(customer="_Test Customer",selling_price_list="_Test Price List",item_code="_Test Tesla Car", rate=5000,qty=1, do_not_submit=True)
+		so = frappe.get_doc('Sales Order', so.name)
+		# check item price before coupon code is applied
+		self.assertEqual(so.items[0].rate, 5000)
+		so.coupon_code='SAVE30'
+		so.sales_partner='_Test Coupon Partner'
+		so.save()
+		# check item price after coupon code is applied
+		self.assertEqual(so.items[0].rate, 3500)	
+		so.submit()
+
+	def test_3_check_coupon_code_used_after_so(self):
+		doc = frappe.get_doc("Coupon Code", frappe.db.get_value("Coupon Code", {"coupon_name":"SAVE30"}))
+		# check no coupon code is used before sales order is made
+		self.assertEqual(doc.get("used"),1)
+
+
+
diff --git a/erpnext/accounts/doctype/pricing_rule/pricing_rule.json b/erpnext/accounts/doctype/pricing_rule/pricing_rule.json
index 0210212..faefc4d 100644
--- a/erpnext/accounts/doctype/pricing_rule/pricing_rule.json
+++ b/erpnext/accounts/doctype/pricing_rule/pricing_rule.json
@@ -425,6 +425,40 @@
    "allow_in_quick_entry": 0, 
    "allow_on_submit": 0, 
    "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
+   "depends_on": "", 
+   "fetch_if_empty": 0, 
+   "fieldname": "coupon_code_based", 
+   "fieldtype": "Check", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_global_search": 0, 
+   "in_list_view": 0, 
+   "in_standard_filter": 0, 
+   "label": "Coupon Code Based", 
+   "length": 0, 
+   "no_copy": 0, 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 0, 
+   "remember_last_selected_value": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 0, 
+   "set_only_once": 0, 
+   "translatable": 0, 
+   "unique": 0
+  },
+  {
+   "allow_bulk_edit": 0, 
+   "allow_in_quick_entry": 0, 
+   "allow_on_submit": 0, 
+   "bold": 0, 
    "collapsible": 1, 
    "columns": 0, 
    "depends_on": "eval:doc.apply_on != 'Transaction'", 
diff --git a/erpnext/accounts/doctype/pricing_rule/utils.py b/erpnext/accounts/doctype/pricing_rule/utils.py
index bbabac4..ef26c2e 100644
--- a/erpnext/accounts/doctype/pricing_rule/utils.py
+++ b/erpnext/accounts/doctype/pricing_rule/utils.py
@@ -531,4 +531,32 @@
 	for d in doc.get("items"):
 		validate_pricing_rule_on_items(doc, d, True)
 
-	return doc
\ No newline at end of file
+	return doc
+
+def validate_coupon_code(coupon_name):
+	from frappe.utils import today,getdate
+	coupon=frappe.get_doc("Coupon Code",coupon_name)
+	if coupon.valid_from:
+		if coupon.valid_from > getdate(today()) :
+			frappe.throw(_("Sorry,coupon code validity has not started"))
+	elif coupon.valid_upto:
+		if coupon.valid_upto < getdate(today()) :
+			frappe.throw(_("Sorry,coupon code validity has expired"))	
+	elif coupon.used>=coupon.maximum_use:
+		frappe.throw(_("Sorry,coupon code are exhausted"))
+	else:
+		return
+
+def update_coupon_code_count(coupon_name,transaction_type):
+	coupon=frappe.get_doc("Coupon Code",coupon_name)
+	if coupon:
+		if transaction_type=='used':
+			if coupon.used<coupon.maximum_use:
+				coupon.used=coupon.used+1
+				coupon.save(ignore_permissions=True)
+			else:
+				frappe.throw(_("{0} Coupon used are {1}. Allowed quantity is exhausted").format(coupon.coupon_code,coupon.used))
+		elif transaction_type=='cancelled':
+			if coupon.used>0:
+				coupon.used=coupon.used-1
+				coupon.save(ignore_permissions=True)
\ No newline at end of file
diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index a9b19ed..5a2f3bc 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -1233,7 +1233,8 @@
 			"is_return": cint(me.frm.doc.is_return),
 			"update_stock": in_list(['Sales Invoice', 'Purchase Invoice'], me.frm.doc.doctype) ? cint(me.frm.doc.update_stock) : 0,
 			"conversion_factor": me.frm.doc.conversion_factor,
-			"pos_profile": me.frm.doc.doctype == 'Sales Invoice' ? me.frm.doc.pos_profile : ''
+			"pos_profile": me.frm.doc.doctype == 'Sales Invoice' ? me.frm.doc.pos_profile : '',
+			"coupon_code": me.frm.doc.coupon_code
 		};
 	},
 
@@ -1742,6 +1743,15 @@
 				frappe.model.set_value(me.frm.doctype + " Item", item.name, "warehouse", me.frm.doc.set_warehouse);
 			});
 		}
+	},
+	coupon_code: function() {
+		var me = this;
+		frappe.run_serially([
+			() => this.frm.doc.ignore_pricing_rule=1,
+			() => me.ignore_pricing_rule(),
+			() => this.frm.doc.ignore_pricing_rule=0,
+			() => me.apply_pricing_rule()
+		]);
 	}
 });
 
diff --git a/erpnext/public/js/shopping_cart.js b/erpnext/public/js/shopping_cart.js
index 5a05268..5705a37 100644
--- a/erpnext/public/js/shopping_cart.js
+++ b/erpnext/public/js/shopping_cart.js
@@ -5,6 +5,19 @@
 frappe.provide("erpnext.shopping_cart");
 var shopping_cart = erpnext.shopping_cart;
 
+var getParams = function (url) {
+	var params = [];
+	var parser = document.createElement('a');
+	parser.href = url;
+	var query = parser.search.substring(1);
+	var vars = query.split('&');
+	for (var i = 0; i < vars.length; i++) {
+		var pair = vars[i].split('=');
+		params[pair[0]] = decodeURIComponent(pair[1]);
+	}
+	return params;
+};
+
 frappe.ready(function() {
 	var full_name = frappe.session && frappe.session.user_fullname;
 	// update user
@@ -12,7 +25,28 @@
 		$('.navbar li[data-label="User"] a')
 			.html('<i class="fa fa-fixed-width fa fa-user"></i> ' + full_name);
 	}
+	// set coupon code and sales partner code
+	var referral_coupon_code=getParams(window.location.href)['cc'];
+	var referral_sales_partner=getParams(window.location.href)['sp'];
+	var d = new Date();
+	// expires within 30 minutes
+	d.setTime(d.getTime() + (0.02 * 24 * 60 * 60 * 1000));
+	var expires = "expires="+d.toUTCString();
+	if (referral_coupon_code) {
+		document.cookie = "referral_coupon_code=" + referral_coupon_code + ";" + expires + ";path=/";
+	}
+	if (referral_sales_partner) {
+		document.cookie = "referral_sales_partner=" + referral_sales_partner + ";" + expires + ";path=/";
+	}
+	referral_coupon_code=frappe.get_cookie("referral_coupon_code");
+	referral_sales_partner=frappe.get_cookie("referral_sales_partner");
 
+	if (referral_coupon_code && $(".tot_quotation_discount").val()==undefined ) {
+		$(".txtcoupon").val(referral_coupon_code);
+	}
+	if (referral_sales_partner) {
+		$(".txtreferral_sales_partner").val(referral_sales_partner);
+	}
 	// update login
 	shopping_cart.show_shoppingcart_dropdown();
 	shopping_cart.set_cart_count();
diff --git a/erpnext/selling/doctype/quotation/quotation.json b/erpnext/selling/doctype/quotation/quotation.json
index 1b89545..365bea9 100644
--- a/erpnext/selling/doctype/quotation/quotation.json
+++ b/erpnext/selling/doctype/quotation/quotation.json
@@ -1904,7 +1904,7 @@
      "in_global_search": 0,
      "in_list_view": 0,
      "in_standard_filter": 0,
-     "label": "Additional Discount",
+     "label": "Additional Discount and Coupon Code",
      "length": 0,
      "no_copy": 0,
      "permlevel": 0,
@@ -1921,6 +1921,74 @@
      "unique": 0
     },
     {
+     "allow_bulk_edit": 0, 
+     "allow_in_quick_entry": 0, 
+     "allow_on_submit": 0, 
+     "bold": 0, 
+     "collapsible": 0, 
+     "columns": 0, 
+     "fetch_if_empty": 0, 
+     "fieldname": "coupon_code", 
+     "fieldtype": "Link", 
+     "hidden": 0, 
+     "ignore_user_permissions": 0, 
+     "ignore_xss_filter": 0, 
+     "in_filter": 0, 
+     "in_global_search": 0, 
+     "in_list_view": 0, 
+     "in_standard_filter": 0, 
+     "label": "Coupon Code", 
+     "length": 0, 
+     "no_copy": 0, 
+     "options": "Coupon Code", 
+     "permlevel": 0, 
+     "precision": "", 
+     "print_hide": 0, 
+     "print_hide_if_no_value": 0, 
+     "read_only": 0, 
+     "remember_last_selected_value": 0, 
+     "report_hide": 0, 
+     "reqd": 0, 
+     "search_index": 0, 
+     "set_only_once": 0, 
+     "translatable": 0, 
+     "unique": 0
+    },
+    {
+     "allow_bulk_edit": 0, 
+     "allow_in_quick_entry": 0, 
+     "allow_on_submit": 0, 
+     "bold": 0, 
+     "collapsible": 0, 
+     "columns": 0, 
+     "fetch_if_empty": 0, 
+     "fieldname": "referral_sales_partner", 
+     "fieldtype": "Link", 
+     "hidden": 0, 
+     "ignore_user_permissions": 0, 
+     "ignore_xss_filter": 0, 
+     "in_filter": 0, 
+     "in_global_search": 0, 
+     "in_list_view": 0, 
+     "in_standard_filter": 0, 
+     "label": "Referral Sales Partner", 
+     "length": 0, 
+     "no_copy": 0, 
+     "options": "Sales Partner", 
+     "permlevel": 0, 
+     "precision": "", 
+     "print_hide": 0, 
+     "print_hide_if_no_value": 0, 
+     "read_only": 0, 
+     "remember_last_selected_value": 0, 
+     "report_hide": 0, 
+     "reqd": 0, 
+     "search_index": 0, 
+     "set_only_once": 0, 
+     "translatable": 0, 
+     "unique": 0
+    },
+    {
      "allow_bulk_edit": 0,
      "allow_in_quick_entry": 0,
      "allow_on_submit": 0,
diff --git a/erpnext/selling/doctype/quotation/quotation.py b/erpnext/selling/doctype/quotation/quotation.py
index 46009f4..4a56e40 100644
--- a/erpnext/selling/doctype/quotation/quotation.py
+++ b/erpnext/selling/doctype/quotation/quotation.py
@@ -142,6 +142,9 @@
 		if customer:
 			target.customer = customer.name
 			target.customer_name = customer.customer_name
+		if source.referral_sales_partner:
+			target.sales_partner=source.referral_sales_partner
+			target.commission_rate=frappe.get_value('Sales Partner', source.referral_sales_partner, 'commission_rate')
 		target.ignore_pricing_rule = 1
 		target.flags.ignore_permissions = ignore_permissions
 		target.run_method("set_missing_values")
diff --git a/erpnext/selling/doctype/sales_order/sales_order.json b/erpnext/selling/doctype/sales_order/sales_order.json
index 3885b13..78e7b4a 100644
--- a/erpnext/selling/doctype/sales_order/sales_order.json
+++ b/erpnext/selling/doctype/sales_order/sales_order.json
@@ -79,6 +79,7 @@
   "loyalty_points",
   "loyalty_amount",
   "section_break_48",
+  "coupon_code",
   "apply_discount_on",
   "base_discount_amount",
   "column_break_50",
@@ -678,7 +679,13 @@
    "collapsible_depends_on": "discount_amount",
    "fieldname": "section_break_48",
    "fieldtype": "Section Break",
-   "label": "Additional Discount"
+   "label": "Additional Discount and Coupon Code"
+  },
+  {
+    "fieldname": "coupon_code",
+    "fieldtype": "Link",
+    "label": "Coupon Code",
+    "options": "Coupon Code"
   },
   {
    "default": "Grand Total",
@@ -1185,7 +1192,7 @@
  "icon": "fa fa-file-text",
  "idx": 105,
  "is_submittable": 1,
- "modified": "2019-10-10 08:46:07.540565",
+ "modified": "2019-10-14 08:46:07.540565",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Sales Order",
@@ -1262,4 +1269,4 @@
  "title_field": "title",
  "track_changes": 1,
  "track_seen": 1
-}
\ No newline at end of file
+}
diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index 80784ea..af78ab2 100755
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -46,6 +46,10 @@
 		self.validate_serial_no_based_delivery()
 		validate_inter_company_party(self.doctype, self.customer, self.company, self.inter_company_order_reference)
 
+		if self.coupon_code:
+			from erpnext.accounts.doctype.pricing_rule.utils import validate_coupon_code
+			validate_coupon_code(self.coupon_code)
+
 		from erpnext.stock.doctype.packed_item.packed_item import make_packing_list
 		make_packing_list(self)
 
@@ -177,6 +181,9 @@
 		self.update_blanket_order()
 
 		update_linked_doc(self.doctype, self.name, self.inter_company_order_reference)
+		if self.coupon_code:
+			from erpnext.accounts.doctype.pricing_rule.utils import update_coupon_code_count
+			update_coupon_code_count(self.coupon_code,'used')
 
 	def on_cancel(self):
 		super(SalesOrder, self).on_cancel()
@@ -195,7 +202,10 @@
 		self.update_blanket_order()
 
 		unlink_inter_company_doc(self.doctype, self.name, self.inter_company_order_reference)
-
+		if self.coupon_code:
+			from erpnext.accounts.doctype.pricing_rule.utils import update_coupon_code_count
+			update_coupon_code_count(self.coupon_code,'cancelled')
+			
 	def update_project(self):
 		if frappe.db.get_single_value('Selling Settings', 'sales_update_frequency') != "Each Transaction":
 			return
diff --git a/erpnext/setup/doctype/sales_partner/sales_partner.js b/erpnext/setup/doctype/sales_partner/sales_partner.js
index 7164add..5656d43 100644
--- a/erpnext/setup/doctype/sales_partner/sales_partner.js
+++ b/erpnext/setup/doctype/sales_partner/sales_partner.js
@@ -24,5 +24,11 @@
 				}
 			}
 		};
+	},
+	referral_code:function(frm){
+		if (frm.doc.referral_code) {
+			frm.doc.referral_code=frm.doc.referral_code.toUpperCase();
+			frm.refresh_field('referral_code');
+		}
 	}
 });
diff --git a/erpnext/setup/doctype/sales_partner/sales_partner.json b/erpnext/setup/doctype/sales_partner/sales_partner.json
index 28cdd3e..7e91fc5 100644
--- a/erpnext/setup/doctype/sales_partner/sales_partner.json
+++ b/erpnext/setup/doctype/sales_partner/sales_partner.json
@@ -517,6 +517,73 @@
    "bold": 0, 
    "collapsible": 0, 
    "columns": 0, 
+   "fetch_if_empty": 0, 
+   "fieldname": "column_break_16", 
+   "fieldtype": "Column Break", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_global_search": 0, 
+   "in_list_view": 0, 
+   "in_standard_filter": 0, 
+   "length": 0, 
+   "no_copy": 0, 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 0, 
+   "remember_last_selected_value": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 0, 
+   "set_only_once": 0, 
+   "translatable": 0, 
+   "unique": 0
+  }, 
+  {
+   "allow_bulk_edit": 0, 
+   "allow_in_quick_entry": 0, 
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
+   "depends_on": "", 
+   "description": "To Track inbound purchase", 
+   "fetch_if_empty": 0, 
+   "fieldname": "referral_code", 
+   "fieldtype": "Data", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_global_search": 0, 
+   "in_list_view": 0, 
+   "in_standard_filter": 0, 
+   "label": "Referral Code", 
+   "length": 8, 
+   "no_copy": 0, 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 0, 
+   "remember_last_selected_value": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 0, 
+   "set_only_once": 0, 
+   "translatable": 0, 
+   "unique": 1
+  },
+  {
+   "allow_bulk_edit": 0, 
+   "allow_in_quick_entry": 0, 
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
    "depends_on": "show_in_website", 
    "fetch_if_empty": 0, 
    "fieldname": "section_break_17", 
diff --git a/erpnext/shopping_cart/cart.py b/erpnext/shopping_cart/cart.py
index 40cb7c8..f850bc1 100644
--- a/erpnext/shopping_cart/cart.py
+++ b/erpnext/shopping_cart/cart.py
@@ -537,3 +537,29 @@
 
 def show_terms(doc):
 	return doc.tc_name
+
+@frappe.whitelist(allow_guest=True)
+def apply_coupon_code(applied_code,applied_referral_sales_partner):
+	quotation = True
+	if applied_code:
+		coupon_list=frappe.get_all('Coupon Code', filters={"docstatus": ("<", "2"), 'coupon_code':applied_code }, fields=['name'])
+		if coupon_list:
+			coupon_name=coupon_list[0].name
+			from erpnext.accounts.doctype.pricing_rule.utils import validate_coupon_code
+			validate_coupon_code(coupon_name)
+			quotation = _get_cart_quotation()
+			quotation.coupon_code=coupon_name
+			quotation.flags.ignore_permissions = True
+			quotation.save()
+			if applied_referral_sales_partner:
+				sales_partner_list=frappe.get_all('Sales Partner', filters={'docstatus': 0, 'referral_code':applied_referral_sales_partner }, fields=['name'])
+				if sales_partner_list:
+					sales_partner_name=sales_partner_list[0].name
+					quotation.referral_sales_partner=sales_partner_name
+					quotation.flags.ignore_permissions = True
+					quotation.save()
+		else:
+			frappe.throw(_("Please enter valid coupon code !!"))
+	else:
+		frappe.throw(_("Please enter coupon code !!"))
+	return quotation
\ No newline at end of file
diff --git a/erpnext/shopping_cart/doctype/shopping_cart_settings/shopping_cart_settings.json b/erpnext/shopping_cart/doctype/shopping_cart_settings/shopping_cart_settings.json
index 8b9299e..330adae 100644
--- a/erpnext/shopping_cart/doctype/shopping_cart_settings/shopping_cart_settings.json
+++ b/erpnext/shopping_cart/doctype/shopping_cart_settings/shopping_cart_settings.json
@@ -276,6 +276,40 @@
      "unique": 0
     },
     {
+     "allow_bulk_edit": 0, 
+     "allow_in_quick_entry": 0, 
+     "allow_on_submit": 0, 
+     "bold": 0, 
+     "collapsible": 0, 
+     "columns": 0, 
+     "depends_on": "", 
+     "fetch_if_empty": 0, 
+     "fieldname": "show_apply_coupon_code_in_website", 
+     "fieldtype": "Check", 
+     "hidden": 0, 
+     "ignore_user_permissions": 0, 
+     "ignore_xss_filter": 0, 
+     "in_filter": 0, 
+     "in_global_search": 0, 
+     "in_list_view": 0, 
+     "in_standard_filter": 0, 
+     "label": "Show Apply Coupon Code", 
+     "length": 0, 
+     "no_copy": 0, 
+     "permlevel": 0, 
+     "precision": "", 
+     "print_hide": 0, 
+     "print_hide_if_no_value": 0, 
+     "read_only": 0, 
+     "remember_last_selected_value": 0, 
+     "report_hide": 0, 
+     "reqd": 0, 
+     "search_index": 0, 
+     "set_only_once": 0, 
+     "translatable": 0, 
+     "unique": 0
+    },
+    {
      "allow_bulk_edit": 0,
      "allow_in_quick_entry": 0,
      "allow_on_submit": 0,
diff --git a/erpnext/templates/includes/cart.js b/erpnext/templates/includes/cart.js
index 4c35dd0..456bc7e 100644
--- a/erpnext/templates/includes/cart.js
+++ b/erpnext/templates/includes/cart.js
@@ -20,6 +20,7 @@
 		shopping_cart.bind_change_qty();
 		shopping_cart.bind_change_notes();
 		shopping_cart.bind_dropdown_cart_buttons();
+		shopping_cart.bind_coupon_code();
 	},
 
 	bind_address_select: function() {
@@ -193,6 +194,29 @@
 				}
 			}
 		});
+	},
+
+	bind_coupon_code: function() {
+		$(".bt-coupon").on("click", function() {
+			shopping_cart.apply_coupon_code(this);
+		});
+	},
+
+	apply_coupon_code: function(btn) {
+		return frappe.call({
+			type: "POST",
+			method: "erpnext.shopping_cart.cart.apply_coupon_code",
+			btn: btn,
+			args : {
+				applied_code : $('.txtcoupon').val(),
+				applied_referral_sales_partner: $('.txtreferral_sales_partner').val()
+			},
+			callback: function(r) {
+				if (r && r.message){
+					location.reload();
+				}
+			}
+		});
 	}
 });
 
diff --git a/erpnext/templates/includes/cart/cart_address.html b/erpnext/templates/includes/cart/cart_address.html
index 2c90f8c..e857ce1 100644
--- a/erpnext/templates/includes/cart/cart_address.html
+++ b/erpnext/templates/includes/cart/cart_address.html
@@ -4,6 +4,16 @@
 	{% set select_address = True %}
 {% endif %}
 
+{% set show_coupon_code = frappe.db.get_single_value('Shopping Cart Settings', 'show_apply_coupon_code_in_website') %}
+{% if show_coupon_code == 1%}
+<div class="mb-3">
+	<div class="row no-gutters">
+		<input type="text" class="txtcoupon form-control mr-3 w-25" placeholder="Enter Coupon Code" name="txtcouponcode"  ></input>
+		<button class="btn btn-primary btn-sm  bt-coupon">{{ _("Apply Coupon Code") }}</button>
+		<input type="hidden" class="txtreferral_sales_partner" placeholder="Enter Sales Partner" name="txtreferral_sales_partner" type="text"></input>
+		</div>
+</div>
+{% endif %}
 <div class="mb-3" data-section="shipping-address">
 	<h6 class="text-uppercase">{{ _("Shipping Address") }}</h6>
 	<div class="row no-gutters" data-fieldname="shipping_address_name">
diff --git a/erpnext/templates/includes/order/order_taxes.html b/erpnext/templates/includes/order/order_taxes.html
index 1d26700..4a32aa4 100644
--- a/erpnext/templates/includes/order/order_taxes.html
+++ b/erpnext/templates/includes/order/order_taxes.html
@@ -22,6 +22,71 @@
 {% endif %}
 {% endfor %}
 
+{% if doc.doctype == 'Quotation' %}
+{% if doc.coupon_code %}
+<tr>
+	<th class="text-right" colspan="2">
+		{{ _("Discount") }}
+	</th>
+	<th class="text-right tot_quotation_discount">
+        {% set tot_quotation_discount = [] %}
+        {%- for item in doc.items -%}
+        {% if tot_quotation_discount.append((((item.price_list_rate * item.qty)
+            * item.discount_percentage) / 100)) %}{% endif %}
+         {% endfor %}
+         {{ frappe.utils.fmt_money((tot_quotation_discount | sum),currency=doc.currency) }}
+	</th>
+</tr>
+{% endif %}
+{% endif %}
+
+{% if doc.doctype == 'Sales Order' %}
+{% if doc.coupon_code %}
+<tr>
+	<th class="text-right" colspan="2">
+		{{ _("Total Amount") }}
+	</th>
+	<th class="text-right">
+        <span>
+        {% set total_amount = [] %}
+        {%- for item in doc.items -%}
+        {% if total_amount.append((item.price_list_rate * item.qty)) %}{% endif %}
+        {% endfor %}
+        {{ frappe.utils.fmt_money((total_amount | sum),currency=doc.currency) }}
+        </span>
+	</th>
+</tr>
+<tr>
+    <th class="text-right" colspan="2">
+        {{ _("Applied Coupon Code") }}
+    </th>
+    <th class="text-right">
+        <span>
+        {%- for row in frappe.get_all(doctype="Coupon Code",
+        fields=["coupon_code"], filters={ "name":doc.coupon_code}) -%}
+            <span>{{ row.coupon_code }}</span>
+        {% endfor %}
+        </span>
+    </th>
+</tr>
+<tr>
+    <th class="text-right" colspan="2">
+        {{ _("Discount") }}
+    </th>
+    <th class="text-right">
+        <span>
+        {% set tot_SO_discount = [] %}
+        {%- for item in doc.items -%}
+        {% if tot_SO_discount.append((((item.price_list_rate * item.qty)
+            * item.discount_percentage) / 100)) %}{% endif %}
+        {% endfor %}
+        {{ frappe.utils.fmt_money((tot_SO_discount | sum),currency=doc.currency) }}
+        </span>
+    </th>
+</tr>
+{% endif %}
+{% endif %}
+
 <tr>
 	<th class="text-right" colspan="2">
 		{{ _("Grand Total") }}