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modules/account_cash_rounding/currency.py

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+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+from decimal import ROUND_HALF_EVEN
+
+from trytond.model import fields
+from trytond.pool import PoolMeta
+from trytond.pyson import Eval
+
+
+class Currency(metaclass=PoolMeta):
+    __name__ = 'currency.currency'
+
+    cash_rounding = fields.Numeric(
+        "Cash Rounding Factor",
+        digits=(None, Eval('digits', None)))
+
+    def cash_round(self, amount, rounding=ROUND_HALF_EVEN):
+        return self._round(amount, self.cash_rounding, rounding)