From f538d36947384c8cdfd78ae473b73b4834e8b671 Mon Sep 17 00:00:00 2001
From: Robert Zajac <rzajac@seas.upenn.edu>
Date: Sun, 21 Oct 2018 14:06:56 -0400
Subject: [PATCH 1/2] Basic multiaddr representation.

---
 network/multiaddr.py | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 network/multiaddr.py

diff --git a/network/multiaddr.py b/network/multiaddr.py
new file mode 100644
index 0000000..38c826d
--- /dev/null
+++ b/network/multiaddr.py
@@ -0,0 +1,39 @@
+class Multiaddr:
+
+    def __init__(self, addr):
+        if not addr[0] == "/":
+            raise MultiaddrValueError("Invalid input multiaddr.")
+
+        addr = addr[1:]
+        protocol_map = dict()
+        split_addr = addr.split("/")
+
+        if len(split_addr) == 0 or len(split_addr) % 2 != 0:
+            raise MultiaddrValueError("Invalid input multiaddr.")
+
+        is_protocol = True
+        curr_protocol = ""
+
+        for addr_part in split_addr:
+            if is_protocol:
+                curr_protocol = addr_part
+            else:
+                protocol_map[curr_protocol] = addr_part
+            is_protocol = not is_protocol
+
+        self.protocol_map = protocol_map
+        self.addr = addr
+
+    def get_protocols(self):
+        return list(self.protocol_map.keys())
+
+    def get_protocol_value(self, protocol):
+        if protocol not in self.protocol_map:
+            return None
+
+        return self.protocol_map[protocol]
+
+
+class MultiaddrValueError(ValueError):
+    """Raised when the input string to the Multiaddr constructor was invalid."""
+    pass

From d59a0907b4418c86a307dfc5e6d84f2d810a30b3 Mon Sep 17 00:00:00 2001
From: Robert Zajac <rzajac@seas.upenn.edu>
Date: Sun, 21 Oct 2018 14:16:26 -0400
Subject: [PATCH 2/2] Updating with results from pylinter

---
 network/multiaddr.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/network/multiaddr.py b/network/multiaddr.py
index 38c826d..e6d4a5c 100644
--- a/network/multiaddr.py
+++ b/network/multiaddr.py
@@ -8,7 +8,7 @@ class Multiaddr:
         protocol_map = dict()
         split_addr = addr.split("/")
 
-        if len(split_addr) == 0 or len(split_addr) % 2 != 0:
+        if not split_addr or len(split_addr) % 2 != 0:
             raise MultiaddrValueError("Invalid input multiaddr.")
 
         is_protocol = True