fix: allow user to set rounding loss allowance for accounts balance

(cherry picked from commit 96a0132)

erpnext/accounts/doctype/exchange_rate_revaluation/exchange_rate_revaluation.js

@@ -35,6 +35,21 @@ frappe.ui.form.on('Exchange Rate Revaluation', {
 		}
 	},
 
+	validate_rounding_loss: function(frm) {
+		allowance = frm.doc.rounding_loss_allowance;
+		if (!(allowance > 0 && allowance < 1)) {
+			frappe.throw(__("Rounding Loss Allowance should be between 0 and 1"));
+		}
+	},
+
+	rounding_loss_allowance: function(frm) {
+		frm.events.validate_rounding_loss(frm);
+	},
+
+	validate: function(frm) {
+		frm.events.validate_rounding_loss(frm);
+	},
+
 	get_entries: function(frm, account) {
 		frappe.call({
 			method: "get_accounts_data",
@@ -126,7 +141,8 @@ var get_account_details = function(frm, cdt, cdn) {
 			company: frm.doc.company,
 			posting_date: frm.doc.posting_date,
 			party_type: row.party_type,
-			party: row.party
+			party: row.party,
+			rounding_loss_allowance: frm.doc.rounding_loss_allowance
 		},
 		callback: function(r){
 			$.extend(row, r.message);

erpnext/accounts/doctype/exchange_rate_revaluation/exchange_rate_revaluation.json

@@ -8,6 +8,7 @@
  "engine": "InnoDB",
  "field_order": [
   "posting_date",
+  "rounding_loss_allowance",
   "column_break_2",
   "company",
   "section_break_4",
@@ -96,11 +97,18 @@
   {
    "fieldname": "column_break_10",
    "fieldtype": "Column Break"
+  },
+  {
+   "default": "0.05",
+   "description": "Only values between 0 and 1 are allowed. \nEx: If allowance is set at 0.07, accounts that have balance of 0.07 in either of the currencies will be considered as zero balance account",
+   "fieldname": "rounding_loss_allowance",
+   "fieldtype": "Float",
+   "label": "Rounding Loss Allowance"
   }
  ],
  "is_submittable": 1,
  "links": [],
- "modified": "2022-12-29 19:38:24.416529",
+ "modified": "2023-06-12 21:02:09.818208",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Exchange Rate Revaluation",

erpnext/accounts/doctype/exchange_rate_revaluation/exchange_rate_revaluation.py

@@ -18,8 +18,13 @@
 
 class ExchangeRateRevaluation(Document):
 	def validate(self):
+		self.validate_rounding_loss_allowance()
 		self.set_total_gain_loss()
 
+	def validate_rounding_loss_allowance(self):
+		if not (self.rounding_loss_allowance > 0 and self.rounding_loss_allowance < 1):
+			frappe.throw(_("Rounding Loss Allowance should be between 0 and 1"))
+
 	def set_total_gain_loss(self):
 		total_gain_loss = 0
 
@@ -92,7 +97,12 @@ def check_journal_entry_condition(self):
 	def get_accounts_data(self):
 		self.validate_mandatory()
 		account_details = self.get_account_balance_from_gle(
-			company=self.company, posting_date=self.posting_date, account=None, party_type=None, party=None
+			company=self.company,
+			posting_date=self.posting_date,
+			account=None,
+			party_type=None,
+			party=None,
+			rounding_loss_allowance=self.rounding_loss_allowance,
 		)
 		accounts_with_new_balance = self.calculate_new_account_balance(
 			self.company, self.posting_date, account_details
@@ -104,7 +114,9 @@ def get_accounts_data(self):
 		return accounts_with_new_balance
 
 	@staticmethod
-	def get_account_balance_from_gle(company, posting_date, account, party_type, party):
+	def get_account_balance_from_gle(
+		company, posting_date, account, party_type, party, rounding_loss_allowance
+	):
 		account_details = []
 
 		if company and posting_date:
@@ -172,10 +184,18 @@ def get_account_balance_from_gle(company, posting_date, account, party_type, par
 				)
 
 				# round off balance based on currency precision
+				# and consider debit-credit difference allowance
 				currency_precision = get_currency_precision()
+				rounding_loss_allowance = rounding_loss_allowance or 0.05
 				for acc in account_details:
 					acc.balance_in_account_currency = flt(acc.balance_in_account_currency, currency_precision)
+					if abs(acc.balance_in_account_currency) <= rounding_loss_allowance:
+						acc.balance_in_account_currency = 0
+
 					acc.balance = flt(acc.balance, currency_precision)
+					if abs(acc.balance) <= rounding_loss_allowance:
+						acc.balance = 0
+
 					acc.zero_balance = (
 						True if (acc.balance == 0 or acc.balance_in_account_currency == 0) else False
 					)
@@ -531,7 +551,9 @@ def calculate_exchange_rate_using_last_gle(company, account, party_type, party):
 
 
 @frappe.whitelist()
-def get_account_details(company, posting_date, account, party_type=None, party=None):
+def get_account_details(
+	company, posting_date, account, party_type=None, party=None, rounding_loss_allowance=None
+):
 	if not (company and posting_date):
 		frappe.throw(_("Company and Posting Date is mandatory"))
 
@@ -549,7 +571,12 @@ def get_account_details(company, posting_date, account, party_type=None, party=N
 		"account_currency": account_currency,
 	}
 	account_balance = ExchangeRateRevaluation.get_account_balance_from_gle(
-		company=company, posting_date=posting_date, account=account, party_type=party_type, party=party
+		company=company,
+		posting_date=posting_date,
+		account=account,
+		party_type=party_type,
+		party=party,
+		rounding_loss_allowance=rounding_loss_allowance,
 	)
 
 	if account_balance and (