diff --git a/client-barcode/freitagskasse.py b/client-barcode/freitagskasse.py
index bbd31a6..08a998d 100644
--- a/client-barcode/freitagskasse.py
+++ b/client-barcode/freitagskasse.py
@@ -6,6 +6,7 @@
 
 from __future__ import print_function
 import freitagslib.network as net
+from freitagslib.commands import BuyCommand, DepositCommand
 
 import sys
 import decimal
diff --git a/client-barcode/freitagslib/commands.py b/client-barcode/freitagslib/commands.py
new file mode 100644
index 0000000..01d48c9
--- /dev/null
+++ b/client-barcode/freitagslib/commands.py
@@ -0,0 +1,35 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2011 Sebastian Pipping <sebastian@pipping.org>
+# Licensed under GPL v3 or later
+
+import freitagslib.network as net
+
+
+class Command(object):
+	def difference(self):
+		return self._difference
+
+
+class DepositCommand(Command):
+	def __init__(self, amount):
+		self._difference = amount
+
+	def run(self, user_name):
+		net.deposit(self._difference, DEPOSIT_CASH, user_name)
+
+	def label(self):
+		return '%.2f Euro einzahlen' % self._difference
+
+
+class BuyCommand(Command):
+	def __init__(self, item):
+		self.item = item
+		self._difference = item.price
+
+	def run(self, user_name):
+		net.buy_item(self.item.id, user_name)
+
+	def label(self):
+		return self.item.name