Relative fees: Round fee to event currency decimal places

pretix_servicefees/signals.py

@@ -4,6 +4,7 @@ from django.urls import resolve, reverse
 from django.dispatch import receiver
 from django.http import HttpRequest
 from django.utils.translation import ugettext_lazy as _, ugettext, get_language
+from pretix.base.decimal import round_decimal
 from pretix.base.models import Event, Order, TaxRule
 from pretix.base.models.orders import OrderFee
 from pretix.base.signals import order_fee_calculation
@@ -35,7 +36,7 @@ def get_fees(event, total, invoice_address, mod=''):
         fee_percent = event.settings.get('service_fee_percent', as_type=Decimal)
 
     if fee_abs and fee_percent and total != Decimal('0.00'):
-        fee = fee_abs + total * (fee_percent / 100)
+        fee = round_decimal(fee_abs + total * (fee_percent / 100), event.currency)
         tax_rule = event.settings.tax_rate_default or TaxRule.zero()
         if tax_rule.tax_applicable(invoice_address):
             tax = tax_rule.tax(fee)