allow configuring how rounding occurs for finance transactions

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.1.6 - 19/06/2024
+
+- allow configuring how rounding occurs for finance transactions
+
 ## 0.1.5 - 18/06/2024
 
 - fixed incorrect payment status for Flex transactions

monzo_utils/model/finance.py

@@ -30,9 +30,29 @@ def all_finance_transactions(self):
         if 'all_finance_transactions' in self.cache:
             return self.cache['all_finance_transactions']
 
-        amounts = [int(self.payment_config['amount'] / self.payment_config['months'] * 100) / 100]
+        total = int(self.payment_config['amount'] * 100)
 
-        final_payment = round(self.payment_config['amount'] - (amounts[0] * (self.payment_config['months']-1)), 2)
+        if 'round' in self.payment_config and self.payment_config['round'] == 'up':
+            if total % self.payment_config['months'] != 0:
+                adjusted = total
+
+                while adjusted % self.payment_config['months'] != 0:
+                    adjusted += 1
+
+                initial_payment = adjusted / self.payment_config['months']
+
+                final_payment = total - (initial_payment * (self.payment_config['months']-1))
+
+                amounts = [initial_payment / 100, final_payment / 100]
+            else:
+                amounts = [int(self.payment_config['amount'] / self.payment_config['months'] * 100) / 100]
+        else:
+            amounts = [int(self.payment_config['amount'] / self.payment_config['months'] * 100) / 100]
+
+            final_payment = round(self.payment_config['amount'] - (amounts[0] * (self.payment_config['months']-1)), 2)
+
+            if final_payment not in amounts:
+                amounts.append(final_payment)
 
         if final_payment not in amounts:
             amounts.append(final_payment)

setup.py

@@ -3,7 +3,7 @@
 from setuptools import setup
 
 setup(name='monzo-utils',
-    version='0.1.5',
+    version='0.1.6',
     description='Monzo Utils',
     author='Mark Wadham',
     url='https://github.com/m4rkw/monzo-utils',