feat: base payment amount in payment schedule
diff --git a/erpnext/accounts/doctype/payment_schedule/payment_schedule.json b/erpnext/accounts/doctype/payment_schedule/payment_schedule.json
index 39eda33..e9f8ba2 100644
--- a/erpnext/accounts/doctype/payment_schedule/payment_schedule.json
+++ b/erpnext/accounts/doctype/payment_schedule/payment_schedule.json
@@ -20,10 +20,13 @@
   "discount",
   "section_break_9",
   "payment_amount",
+  "outstanding",
+  "paid_amount",
   "discounted_amount",
   "column_break_3",
-  "outstanding",
-  "paid_amount"
+  "base_payment_amount",
+  "base_outstanding",
+  "base_paid_amount"
  ],
  "fields": [
   {
@@ -65,6 +68,7 @@
    "fieldtype": "Currency",
    "in_list_view": 1,
    "label": "Payment Amount",
+   "options": "currency",
    "reqd": 1
   },
   {
@@ -77,7 +81,8 @@
    "depends_on": "paid_amount",
    "fieldname": "paid_amount",
    "fieldtype": "Currency",
-   "label": "Paid Amount"
+   "label": "Paid Amount",
+   "options": "currency"
   },
   {
    "fieldname": "column_break_3",
@@ -96,6 +101,7 @@
    "fieldname": "outstanding",
    "fieldtype": "Currency",
    "label": "Outstanding",
+   "options": "currency",
    "read_only": 1
   },
   {
@@ -144,12 +150,34 @@
   {
    "fieldname": "section_break_4",
    "fieldtype": "Section Break"
+  },
+  {
+   "fieldname": "base_payment_amount",
+   "fieldtype": "Currency",
+   "label": "Payment Amount (Company Currency)",
+   "options": "Company:company:default_currency"
+  },
+  {
+   "default": "0",
+   "fieldname": "base_outstanding",
+   "fieldtype": "Currency",
+   "label": "Outstanding (Company Currency)",
+   "options": "Company:company:default_currency",
+   "read_only": 1
+  },
+  {
+   "default": "0",
+   "fieldname": "base_paid_amount",
+   "fieldtype": "Currency",
+   "label": "Paid Amount (Company Currency)",
+   "options": "Company:company:default_currency",
+   "read_only": 1
   }
  ],
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-04-12 15:39:47.363609",
+ "modified": "2021-04-23 13:55:59.548043",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Payment Schedule",
diff --git a/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
index 50492f5..66be11f 100644
--- a/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
@@ -397,7 +397,7 @@
 
 		pi.update({
 			"payment_schedule": get_payment_terms("_Test Payment Term Template",
-				pi.posting_date, pi.grand_total)
+				pi.posting_date, pi.grand_total, pi.base_grand_total)
 		})
 
 		pi.save()
diff --git a/erpnext/controllers/accounts_controller.py b/erpnext/controllers/accounts_controller.py
index d36e7b0..c51d828 100644
--- a/erpnext/controllers/accounts_controller.py
+++ b/erpnext/controllers/accounts_controller.py
@@ -904,20 +904,24 @@
 		date = self.get("due_date")
 		due_date = date or posting_date
 
-		if party_account_currency == self.company_currency:
-			grand_total = self.get("base_rounded_total") or self.base_grand_total
-		else:
-			grand_total = self.get("rounded_total") or self.grand_total
+		base_grand_total = self.get("base_rounded_total") or self.base_grand_total
+		grand_total = self.get("rounded_total") or self.grand_total
 
 		if self.doctype in ("Sales Invoice", "Purchase Invoice"):
+			base_grand_total = base_grand_total - flt(self.base_write_off_amount)
 			grand_total = grand_total - flt(self.write_off_amount)
 
 		if self.get("total_advance"):
-			grand_total -= self.get("total_advance")
+			if party_account_currency == self.company_currency:
+				base_grand_total -= self.get("total_advance")
+				grand_total = flt(base_grand_total / self.get("conversion_rate"), self.precision("grand_total"))
+			else:
+				grand_total -= self.get("total_advance")
+				base_grand_total = flt(grand_total * self.get("conversion_rate"), self.precision("base_grand_total"))
 
 		if not self.get("payment_schedule"):
 			if self.get("payment_terms_template"):
-				data = get_payment_terms(self.payment_terms_template, posting_date, grand_total)
+				data = get_payment_terms(self.payment_terms_template, posting_date, grand_total, base_grand_total)
 				for item in data:
 					self.append("payment_schedule", item)
 			else:
@@ -927,7 +931,9 @@
 			for d in self.get("payment_schedule"):
 				if d.invoice_portion:
 					d.payment_amount = flt(grand_total * flt(d.invoice_portion / 100), d.precision('payment_amount'))
+					d.base_payment_amount = flt(base_grand_total * flt(d.invoice_portion / 100), d.precision('payment_amount'))
 					d.outstanding = d.payment_amount
+					d.base_outstanding = d.base_payment_amount
 
 	def set_due_date(self):
 		due_dates = [d.due_date for d in self.get("payment_schedule") if d.due_date]
@@ -963,22 +969,28 @@
 
 		if self.get("payment_schedule"):
 			total = 0
+			base_total = 0
 			for d in self.get("payment_schedule"):
 				total += flt(d.payment_amount)
+				base_total += flt(d.base_payment_amount)
 
-			if party_account_currency == self.company_currency:
-				total = flt(total, self.precision("base_grand_total"))
-				grand_total = flt(self.get("base_rounded_total") or self.base_grand_total, self.precision('base_grand_total'))
-			else:
-				total = flt(total, self.precision("grand_total"))
-				grand_total = flt(self.get("rounded_total") or self.grand_total, self.precision('grand_total'))
-
-			if self.get("total_advance"):
-				grand_total -= self.get("total_advance")
+			base_grand_total = self.get("base_rounded_total") or self.base_grand_total
+			grand_total = self.get("rounded_total") or self.grand_total
 
 			if self.doctype in ("Sales Invoice", "Purchase Invoice"):
+				base_grand_total = base_grand_total - flt(self.base_write_off_amount)
 				grand_total = grand_total - flt(self.write_off_amount)
-			if total != flt(grand_total, self.precision("grand_total")):
+
+			if self.get("total_advance"):
+				if party_account_currency == self.company_currency:
+					base_grand_total -= self.get("total_advance")
+					grand_total = flt(base_grand_total / self.get("conversion_rate"), self.precision("grand_total"))
+				else:
+					grand_total -= self.get("total_advance")
+					base_grand_total = flt(grand_total * self.get("conversion_rate"), self.precision("base_grand_total"))
+
+			if total != flt(grand_total, self.precision("grand_total")) or \
+				base_total != flt(base_grand_total, self.precision("base_grand_total")):
 				frappe.throw(_("Total Payment Amount in Payment Schedule must be equal to Grand / Rounded Total"))
 
 	def is_rounded_total_disabled(self):
@@ -1218,7 +1230,7 @@
 
 
 @frappe.whitelist()
-def get_payment_terms(terms_template, posting_date=None, grand_total=None, bill_date=None):
+def get_payment_terms(terms_template, posting_date=None, grand_total=None, base_grand_total=None, bill_date=None):
 	if not terms_template:
 		return
 
@@ -1226,14 +1238,14 @@
 
 	schedule = []
 	for d in terms_doc.get("terms"):
-		term_details = get_payment_term_details(d, posting_date, grand_total, bill_date)
+		term_details = get_payment_term_details(d, posting_date, grand_total, base_grand_total, bill_date)
 		schedule.append(term_details)
 
 	return schedule
 
 
 @frappe.whitelist()
-def get_payment_term_details(term, posting_date=None, grand_total=None, bill_date=None):
+def get_payment_term_details(term, posting_date=None, grand_total=None, base_grand_total=None, bill_date=None):
 	term_details = frappe._dict()
 	if isinstance(term, text_type):
 		term = frappe.get_doc("Payment Term", term)
@@ -1242,10 +1254,11 @@
 	term_details.description = term.description
 	term_details.invoice_portion = term.invoice_portion
 	term_details.payment_amount = flt(term.invoice_portion) * flt(grand_total) / 100
+	term_details.base_payment_amount = flt(term.invoice_portion) * flt(base_grand_total) / 100
 	term_details.discount_type = term.discount_type
 	term_details.discount = term.discount
-	# term_details.discounted_amount = flt(grand_total) * (term.discount / 100) if term.discount_type == 'Percentage' else discount
 	term_details.outstanding = term_details.payment_amount
+	term_details.base_outstanding = term_details.base_payment_amount
 	term_details.mode_of_payment = term.mode_of_payment
 
 	if bill_date:
diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index a0398e7..258262a 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -1995,6 +1995,7 @@
 					terms_template: doc.payment_terms_template,
 					posting_date: posting_date,
 					grand_total: doc.rounded_total || doc.grand_total,
+					base_grand_total: doc.base_rounded_total || doc.base_grand_total,
 					bill_date: doc.bill_date
 				},
 				callback: function(r) {
@@ -2009,13 +2010,15 @@
 	payment_term: function(doc, cdt, cdn) {
 		var row = locals[cdt][cdn];
 		if(row.payment_term) {
+			debugger;
 			frappe.call({
 				method: "erpnext.controllers.accounts_controller.get_payment_term_details",
 				args: {
 					term: row.payment_term,
 					bill_date: this.frm.doc.bill_date,
 					posting_date: this.frm.doc.posting_date || this.frm.doc.transaction_date,
-					grand_total: this.frm.doc.rounded_total || this.frm.doc.grand_total
+					grand_total: this.frm.doc.rounded_total || this.frm.doc.grand_total,
+					base_grand_total: this.frm.doc.base_rounded_total || this.frm.doc.base_grand_total
 				},
 				callback: function(r) {
 					if(r.message && !r.exc) {