fix notify command and migrate to use scripthashes

lib/commands.py

@@ -656,13 +656,15 @@ class Commands:
             import urllib.request
             headers = {'content-type':'application/json'}
             data = {'address':address, 'status':x.get('result')}
+            serialized_data = util.to_bytes(json.dumps(data))
             try:
-                req = urllib.request.Request(URL, json.dumps(data), headers)
+                req = urllib.request.Request(URL, serialized_data, headers)
                 response_stream = urllib.request.urlopen(req, timeout=5)
                 util.print_error('Got Response for %s' % address)
             except BaseException as e:
                 util.print_error(str(e))
-        self.network.send([('blockchain.address.subscribe', [address])], callback)
+        h = self.network.addr_to_scripthash(address)
+        self.network.send([('blockchain.scripthash.subscribe', [h])], callback)
         return True
 
     @command('wn')