[FIX] account_reconciliation_widget: Avoid unbalanced foreign currenc…

…y reconciliations

When having a statement line in a foreign currency, each resulting
journal item computes the debit/credit amount from the foreign currency
rate, and then rounding the result to company currency digits.

There's a chance in this process that the journal entry final balance
is not 0 summing the rounded balances in company currency.

For fixing this, there can be several strategies, like creating an
extra journal item for the difference, but I have opted for removing
the difference in the latest counterpart aml, so no extra noise and
no need of account decision algorithm for this extra move.

As currency amounts are correct and are the ones used in reconciliation,
there won't be any problem adjusting this amount.

TT45568

account_reconciliation_widget/models/account_bank_statement.py

@@ -1,5 +1,6 @@
 from odoo import _, fields, models
 from odoo.exceptions import UserError
+from odoo.tools import float_is_zero
 
 
 class AccountBankStatement(models.Model):
@@ -195,7 +196,26 @@ def _create_counterpart_and_new_aml(
             aml_dict["partner_id"] = self.partner_id.id
             aml_dict["statement_line_id"] = self.id
             self._prepare_move_line_for_currency(aml_dict, date)
-
+        # Adjust latest counterpart move debit/credit if currency amount is balanced
+        # but company amount is not
+        if self.currency_id != self.company_currency_id:
+            all_amls = to_create + [liquidity_aml_dict]
+            balance_currency = sum(x["amount_currency"] for x in all_amls)
+            balance = sum(x["debit"] - x["credit"] for x in all_amls)
+            if float_is_zero(
+                balance_currency, precision_rounding=self.currency_id.rounding
+            ) and not float_is_zero(
+                balance, precision_rounding=self.company_currency_id.rounding
+            ):
+                aml_dict = to_create[-1]
+                if aml_dict["debit"]:
+                    aml_dict["debit"] = self.company_currency_id.round(
+                        aml_dict["debit"] - balance
+                    )
+                else:
+                    aml_dict["credit"] = self.company_currency_id.round(
+                        aml_dict["credit"] + balance
+                    )
         # Create write-offs
         wo_aml = self.env["account.move.line"]
         for aml_dict in new_aml_dicts: