[IMP] account_statement_import_camt54: transfer_line feature

- Use currency.iz_zero() instead of direct comparison
- Add information about camt54 usage in the help of the field

account_statement_import_camt54/models/account_journal.py

@@ -10,5 +10,6 @@ class AccountBankStatementImport(models.Model):
 
     transfer_line = fields.Boolean(
         string="Add balance Line",
-        help="Generate balance line on total of bank statement import",
+        help="For camt54 files, generate balance line on total of bank statement "
+        "import",
     )

account_statement_import_camt54/models/account_statement_import.py

@@ -20,8 +20,9 @@ def _create_bank_statements(self, stmts_vals, result):
         statements = self.env["account.bank.statement"].browse(result["statement_ids"])
         for statement in statements:
             amount = sum(statement.line_ids.mapped("amount"))
-            if statement.journal_id.transfer_line:
-                if amount != 0:
+            journal = statement.journal_id
+            if journal.transfer_line:
+                if not journal.currency_id.is_zero(amount):
                     amount = -amount
                 statement.line_ids.create(
                     {