diff --git a/static_src/reducers/redux-helpers.js b/static_src/reducers/redux-helpers.js
new file mode 100644
index 0000000..ce80d60
--- /dev/null
+++ b/static_src/reducers/redux-helpers.js
@@ -0,0 +1,64 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+export const createReducer = (initialState, handlers) => {
+  return function reducer(state = initialState, action) {
+    if (handlers.hasOwnProperty(action.type)) {
+      return handlers[action.type](state, action);
+    } else {
+      return state;
+    }
+  };
+};
+
+const DEFAULT_REQUEST_KEY = '*';
+
+export const createKeyedRequestReducer = (start, success, failure) => {
+  return createReducer({}, {
+    [start]: (state, {requestKey = DEFAULT_REQUEST_KEY}) => {
+      return {
+        ...state,
+        [requestKey]: {
+          requesting: true,
+          error: null,
+        },
+      };
+    },
+    [success]: (state, {requestKey = DEFAULT_REQUEST_KEY}) =>{
+      return {
+        ...state,
+        [requestKey]: {
+          requesting: false,
+          error: null,
+        },
+      };
+    },
+    [failure]: (state, {requestKey = DEFAULT_REQUEST_KEY, error}) => {
+      return {
+        ...state,
+        [requestKey]: {
+          requesting: false,
+          error,
+        },
+      };
+    },
+  });
+};
+
+export const createRequestReducer = (start, success, failure) => {
+  return createReducer({requesting: false, error: null}, {
+    [start]: (_state, _action) => ({
+      requesting: true,
+      error: null,
+    }),
+    [success]: (_state, _action) =>({
+      requesting: false,
+      error: null,
+    }),
+    [failure]: (_state, {error}) => ({
+      requesting: false,
+      error,
+    }),
+  });
+};