htlcswitch/hop: move hop.Exit and hop.Source to hop pkg

htlcswitch/hop/type.go

@@ -0,0 +1,13 @@
+package hop
+
+import "github.com/lightningnetwork/lnd/lnwire"
+
+var (
+	// Exit is a special "hop" denoting that an incoming HTLC is meant to
+	// pay finally to the receiving node.
+	Exit lnwire.ShortChannelID
+
+	// Source is a sentinel "hop" denoting that an incoming HTLC is
+	// initiated by our own switch.
+	Source lnwire.ShortChannelID
+)