Merge pull request #57734 from aerele/fix/payment-reconciliation-supplier-gain-loss-sign

fix(payment reconciliation): correct supplier gain/loss posting

erpnext/accounts/doctype/payment_reconciliation/test_payment_reconciliation.py

@@ -2499,6 +2499,86 @@ class TestPaymentReconciliation(ERPNextTestSuite):
 		self.assertEqual(flt(pr.allocation[0].get("difference_amount")), -5000.0)
 		pr.reconcile()
 
+	def test_foreign_currency_reverse_payment_entry_gain_for_supplier(self):
+		transaction_date = nowdate()
+		self.supplier = "_Test Supplier USD"
+		amount = 100
+		department = frappe.db.get_value("Department", {"company": self.company, "is_group": 0}, "name")
+
+		# Pay USD 100 at an exchange rate of 90.
+		pe = self.create_payment_entry(amount=amount, posting_date=transaction_date)
+		pe.payment_type = "Pay"
+		pe.party_type = "Supplier"
+		pe.party = self.supplier
+		pe.paid_from = self.cash
+		pe.paid_from_account_currency = "INR"
+		pe.target_exchange_rate = 90
+		pe.paid_amount = 90 * amount
+		pe.received_amount = amount
+		pe.paid_to = self.creditors_usd
+		pe.paid_to_account_currency = "USD"
+		pe.department = department
+		pe = pe.save().submit()
+
+		# Receive USD 100 from the supplier at an exchange rate of 100.
+		reverse_pe = self.create_payment_entry(amount=amount, posting_date=transaction_date)
+		reverse_pe.payment_type = "Receive"
+		reverse_pe.party_type = "Supplier"
+		reverse_pe.party = self.supplier
+		reverse_pe.paid_from = self.creditors_usd
+		reverse_pe.paid_from_account_currency = "USD"
+		reverse_pe.source_exchange_rate = 100
+		reverse_pe.paid_amount = amount
+		reverse_pe.received_amount = 100 * amount
+		reverse_pe.paid_to = self.cash
+		reverse_pe.paid_to_account_currency = "INR"
+		reverse_pe.department = department
+		reverse_pe = reverse_pe.save().submit()
+
+		pr = self.create_payment_reconciliation(party_is_customer=False)
+		pr.party = self.supplier
+		pr.receivable_payable_account = self.creditors_usd
+		pr.get_unreconciled_entries()
+		invoices = [invoice.as_dict() for invoice in pr.invoices]
+		payments = [payment.as_dict() for payment in pr.payments]
+		pr.allocate_entries(frappe._dict({"invoices": invoices, "payments": payments}))
+		for row in pr.allocation:
+			row.department = department
+
+		self.assertEqual(flt(pr.allocation[0].difference_amount), 1000)
+		pr.reconcile()
+
+		gain_loss_journal = frappe.db.get_value(
+			"Journal Entry Account",
+			{
+				"reference_type": reverse_pe.doctype,
+				"reference_name": reverse_pe.name,
+				"party": self.supplier,
+				"docstatus": 1,
+			},
+			"parent",
+		)
+		party_row = frappe.db.get_value(
+			"Journal Entry Account",
+			{"parent": gain_loss_journal, "party": self.supplier},
+			["debit", "credit"],
+			as_dict=True,
+		)
+		self.assertEqual(flt(party_row.debit), 1000)
+		self.assertEqual(flt(party_row.credit), 0)
+
+		party_gl_entries = frappe.get_all(
+			"GL Entry",
+			filters={
+				"voucher_no": ["in", [pe.name, reverse_pe.name, gain_loss_journal]],
+				"account": self.creditors_usd,
+				"party": self.supplier,
+				"is_cancelled": 0,
+			},
+			fields=["debit", "credit"],
+		)
+		self.assertEqual(flt(sum(row.debit - row.credit for row in party_gl_entries)), 0)
+
 	def test_foreign_currency_reverse_journal_entry_against_journal_entry_for_customer(self):
 		transaction_date = nowdate()
 		customer = self.customer_usd

erpnext/accounts/services/exchange_gain_loss.py

@@ -195,7 +195,7 @@ def make_exchange_gain_loss_journal(
 
 def is_payable_account(reference_doctype: str, account: str) -> bool:
 	if reference_doctype == "Purchase Invoice" or (
-		reference_doctype == "Journal Entry"
+		reference_doctype in ("Journal Entry", "Payment Entry")
 		and frappe.get_cached_value("Account", account, "account_type") == "Payable"
 	):
 		return True