diff --git a/coinparty/peer.py b/coinparty/peer.py
index e69de29..a11450c 100644
--- a/coinparty/peer.py
+++ b/coinparty/peer.py
@@ -0,0 +1,10 @@
+class State:
+
+    def __init__(self):
+        self.mixing_peers = set()
+        self.input_peers = set()
+
+
+def start():
+
+    return State()
diff --git a/coinparty/protocol.py b/coinparty/protocol.py
index e69de29..686dbb4 100644
--- a/coinparty/protocol.py
+++ b/coinparty/protocol.py
@@ -0,0 +1,8 @@
+def c1_generate_addresses(state):
+    updated_state = None
+    return updated_state
+
+
+def c2_compute_local_share_of_pub_key(state):
+    updated_state = None
+    return updated_state