added RoutedHost and updated new_node to support it

libp2p/kademlia/routed_host.py

@@ -0,0 +1,35 @@
+from libp2p.host.basic_host import BasicHost
+
+class RoutedHost(BasicHost):
+    def __init__(self, _network, _kad_network):
+        super(RoutedHost, self).__init__(_network)
+        self.kad_network = _kad_network
+
+    def get_kad_network(self):
+        return self.kad_network
+
+    def kad_listen(self, port, interface='0.0.0.0'):
+        return self.kad_network.listen(port, interface)
+
+    def kad_get(self, key):
+        return self.kad_network.get(key)
+
+    def kad_set(self, key, value):
+        return self.kad_network.set(key, value)
+
+    def kad_set_digest(self, dkey, value):
+        return self.kad_network.set_digest(dkey, value)
+
+def check_dht_value_type(value):
+    """
+    Checks to see if the type of the value is a valid type for
+    placing in the dht.
+    """
+    typeset = [
+        int,
+        float,
+        bool,
+        str,
+        bytes
+    ]
+    return type(value) in typeset  # pylint: disable=unidiomatic-typecheck