diff --git a/event/addrs.go b/event/addrs.go
new file mode 100644
index 0000000..d39024e
--- /dev/null
+++ b/event/addrs.go
@@ -0,0 +1,25 @@
+package event
+
+import (
+	"github.com/libp2p/go-libp2p-core/routing"
+	ma "github.com/multiformats/go-multiaddr"
+)
+
+// EvtLocalAddressesUpdated should be emitted when the set of listen addresses for
+// the local host changes. This may happen for a number of reasons. For example,
+// we may have opened a new relay connection, established a new NAT mapping via
+// UPnP, or been informed of our observed address by another peer.
+type EvtLocalAddressesUpdated struct {
+	// Added enumerates the listen addresses that were added for the local peer.
+	Added []ma.Multiaddr
+
+	// Removed enumerates listen addresses that were removed from the local peer.
+	Removed []ma.Multiaddr
+}
+
+// EvtLocalPeerRoutingStateUpdated should be emitted when a new SignedRoutingState
+// record for the local peer has been produced. This will happen whenever the set
+// of listen addresses changes.
+type EvtLocalPeerRoutingStateUpdated struct {
+	State *routing.SignedRoutingState
+}