Move body of Client._payload_post to State

fbchat/_client.py

@@ -115,11 +115,7 @@ class Client(object):
         return self._state._post(url, params, files=files, as_graphql=as_graphql)
 
     def _payload_post(self, url, data, files=None):
-        j = self._post(url, data, files=files)
-        try:
-            return j["payload"]
-        except (KeyError, TypeError):
-            raise FBchatException("Missing payload: {}".format(j))
+        return self._state._payload_post(url, data, files=files)
 
     def graphql_requests(self, *queries):
         """Execute GraphQL queries.

fbchat/_state.py

@@ -240,3 +240,10 @@ class State(object):
                     error_retries=error_retries - 1,
                 )
             raise
+
+    def _payload_post(self, url, data, files=None):
+        j = self._post(url, data, files=files)
+        try:
+            return j["payload"]
+        except (KeyError, TypeError):
+            raise _exception.FBchatException("Missing payload: {}".format(j))