diff --git a/peer/addrbook_interface.py b/peer/addrbook_interface.py
new file mode 100644
index 00000000..1499beaa
--- /dev/null
+++ b/peer/addrbook_interface.py
@@ -0,0 +1,51 @@
+from abc import ABC, abstractmethod
+
+class IAddrBook(ABC):
+
+	def __init__(self, context):
+        self.context = context
+
+	@abstractmethod
+	def add_addr(self, peerID, addr, ttl):
+		"""
+		Calls add_addrs(peerID, [addr], ttl)
+		:param peerID: the peer to add address for
+		:param addr: multiaddress of the peer
+		:param ttl: time-to-live for the address (after this time, address is no longer valid)
+		"""
+		pass
+
+	@abstractmethod
+	def add_addrs(self, peerID, addrs []ma.Multiaddr, ttl time.Duration):
+		"""
+		Adds addresses for a given peer all with the same time-to-live. If one of the 
+		addresses already exists for the peer and has a longer TTL, no operation should take place.
+		If one of the addresses exists with a shorter TTL, extend the TTL to equal param ttl.
+		:param peerID: the peer to add address for
+		:param addr: multiaddresses of the peer
+		:param ttl: time-to-live for the address (after this time, address is no longer valid
+		"""
+		pass
+
+	@abstractmethod
+	def addrs(self, peerID):
+		"""
+		:param peerID: peer to get addresses of
+		:return: all known (and valid) addresses for the given peer
+		"""
+		pass
+
+	@abstractmethod
+	def clear_addrs(self, peerID):
+		"""
+		Removes all previously stored addresses
+		:param peerID: peer to remove addresses of
+		"""
+		pass
+
+	@abstractmethod
+	def peers_with_addrs(self):
+		"""
+		:return: all of the peer IDs stored with addresses
+        """
+		pass
\ No newline at end of file
diff --git a/peer/peermetadata_interface.py b/peer/peermetadata_interface.py
new file mode 100644
index 00000000..ea3cb669
--- /dev/null
+++ b/peer/peermetadata_interface.py
@@ -0,0 +1,25 @@
+from abc import ABC, abstractmethod
+
+class IPeerMetadata(ABC):
+
+	def __init__(self, context):
+        self.context = context
+
+	@abstractmethod
+	def get(self, peerID, key):
+		"""
+		:param peerID: peer ID to lookup key for
+		:param key: key to look up
+        :return: value at key for given peer, error
+        """
+		pass
+
+	@abstractmethod
+	def put(self, peerID, key, val):
+		"""
+		:param peerID: peer ID to lookup key for
+		:param key: key to associate with peer
+		:param val: value to associated with key
+        :return: error
+        """
+		pass
\ No newline at end of file
diff --git a/peer/peerstore_interface.py b/peer/peerstore_interface.py
new file mode 100644
index 00000000..e1c0248a
--- /dev/null
+++ b/peer/peerstore_interface.py
@@ -0,0 +1,49 @@
+from abc import ABC, abstractmethod
+from .addrbook_interace import IAddrBook
+from .peermetadata_interface import IPeerMetadata
+
+class IPeerStore(ABC, IAddrBook, IPeerMetadata):
+
+	def __init__(self, context):
+        self.context = context
+
+	@abstractmethod
+	def peer_info(self, peerID):
+		"""
+        :param peerID: peer ID to get info for
+        :return: peer info object
+        """
+		pass
+
+	@abstractmethod
+	def get_protocols(self, peerID):
+		"""
+        :param peerID: peer ID to get protocols for
+        :return: protocols (as strings), error
+        """
+		pass
+
+	@abstractmethod
+	def add_protocols(self, peerID, protocols):
+		"""
+        :param peerID: peer ID to add protocols for
+        :param protocols: protocols to add
+        :return: error
+        """
+		pass
+
+	@abstractmethod
+	def set_protocols(self, peerID, protocols):
+		"""
+        :param peerID: peer ID to set protocols for
+        :param protocols: protocols to set
+        :return: error
+        """
+		pass
+
+	@abstractmethod
+	def peers(self):
+		"""
+        :return: all of the peer IDs stored in peer store
+        """
+		pass