diff --git a/react/features/app/types.ts b/react/features/app/types.ts
index 7817178c7..896371e59 100644
--- a/react/features/app/types.ts
+++ b/react/features/app/types.ts
@@ -5,6 +5,7 @@ import { IAppState } from '../base/app/reducer';
 import { IAudioOnlyState } from '../base/audio-only/reducer';
 import { IConferenceState } from '../base/conference/reducer';
 import { IConfig } from '../base/config/configType';
+import { IConnectionState } from '../base/connection/reducer';
 
 export interface IStore {
     getState: Function,
@@ -19,4 +20,5 @@ export interface IState {
     'features/base/audio-only': IAudioOnlyState,
     'features/base/conference': IConferenceState,
     'features/base/config': IConfig,
+    'features/base/connection': IConnectionState
 }
diff --git a/react/features/authentication/reducer.ts b/react/features/authentication/reducer.ts
index 53641f9a9..c7c4c2c5e 100644
--- a/react/features/authentication/reducer.ts
+++ b/react/features/authentication/reducer.ts
@@ -1,7 +1,4 @@
-/* eslint-disable import/order */
 import ReducerRegistry from '../base/redux/ReducerRegistry';
-
-// @ts-ignore
 import { assign } from '../base/redux/functions';
 
 import {
diff --git a/react/features/base/conference/reducer.ts b/react/features/base/conference/reducer.ts
index 8b2fb39b4..9e6a666cd 100644
--- a/react/features/base/conference/reducer.ts
+++ b/react/features/base/conference/reducer.ts
@@ -8,8 +8,7 @@ import { CONNECTION_WILL_CONNECT, SET_LOCATION_URL } from '../connection';
 // @ts-ignore
 import { JitsiConferenceErrors } from '../lib-jitsi-meet';
 
-// @ts-ignore
-import { assign, set } from '../redux';
+import { assign, set } from '../redux/functions';
 import ReducerRegistry from '../redux/ReducerRegistry';
 
 import {
@@ -58,6 +57,14 @@ export interface IConferenceState {
     passwordRequired: boolean|undefined;
     authEnabled?: boolean|undefined;
     authLogin?: string|undefined;
+    subject?: string;
+    localSubject?: string;
+    conferenceTimestamp?: number;
+    authRequired?: Object;
+    followMeEnabled?: boolean;
+    startReactionsMuted?: boolean;
+    room?: Object;
+    pendingSubjectChange?: string;
 }
 
 /**
diff --git a/react/features/base/config/reducer.ts b/react/features/base/config/reducer.ts
index f7f2b27c0..5c9706321 100644
--- a/react/features/base/config/reducer.ts
+++ b/react/features/base/config/reducer.ts
@@ -3,8 +3,7 @@ import _ from 'lodash';
 
 import { CONFERENCE_INFO } from '../../conference/components/constants';
 
-// @ts-ignore
-import { equals } from '../redux';
+import { equals } from '../redux/functions';
 import ReducerRegistry from '../redux/ReducerRegistry';
 
 import {
diff --git a/react/features/base/connection/reducer.js b/react/features/base/connection/reducer.ts
similarity index 77%
rename from react/features/base/connection/reducer.js
rename to react/features/base/connection/reducer.ts
index bb983bbf6..fe868af72 100644
--- a/react/features/base/connection/reducer.js
+++ b/react/features/base/connection/reducer.ts
@@ -1,8 +1,11 @@
-/* @flow */
+/* eslint-disable import/order */
 
-import { SET_ROOM } from '../conference';
+import { SET_ROOM } from '../conference/actionTypes';
+
+// @ts-ignore
 import { JitsiConnectionErrors } from '../lib-jitsi-meet';
-import { assign, set, ReducerRegistry } from '../redux';
+import { assign, set } from '../redux/functions';
+import ReducerRegistry from '../redux/ReducerRegistry';
 
 import {
     CONNECTION_DISCONNECTED,
@@ -12,14 +15,26 @@ import {
     SET_LOCATION_URL,
     SHOW_CONNECTION_INFO
 } from './actionTypes';
-import type { ConnectionFailedError } from './actions.native';
+
+// @ts-ignore
+import { ConnectionFailedError } from './actions.native';
+
+export interface IConnectionState {
+    connection?: Object;
+    connecting?: Object;
+    timeEstablished?: number;
+    error?: ConnectionFailedError;
+    passwordRequired?: Object;
+    locationURL?: URL;
+    showConnectionInfo?: boolean;
+}
 
 /**
  * Reduces the Redux actions of the feature base/connection.
  */
 ReducerRegistry.register(
     'features/base/connection',
-    (state: Object = {}, action: Object) => {
+    (state: IConnectionState = {}, action: any) => {
         switch (action.type) {
         case CONNECTION_DISCONNECTED:
             return _connectionDisconnected(state, action);
@@ -50,14 +65,14 @@ ReducerRegistry.register(
  * Reduces a specific Redux action CONNECTION_DISCONNECTED of the feature
  * base/connection.
  *
- * @param {Object} state - The Redux state of the feature base/connection.
+ * @param {IConnectionState} state - The Redux state of the feature base/connection.
  * @param {Action} action - The Redux action CONNECTION_DISCONNECTED to reduce.
  * @private
  * @returns {Object} The new state of the feature base/connection after the
  * reduction of the specified action.
  */
 function _connectionDisconnected(
-        state: Object,
+        state: IConnectionState,
         { connection }: { connection: Object }) {
     const connection_ = _getCurrentConnection(state);
 
@@ -76,14 +91,14 @@ function _connectionDisconnected(
  * Reduces a specific Redux action CONNECTION_ESTABLISHED of the feature
  * base/connection.
  *
- * @param {Object} state - The Redux state of the feature base/connection.
+ * @param {IConnectionState} state - The Redux state of the feature base/connection.
  * @param {Action} action - The Redux action CONNECTION_ESTABLISHED to reduce.
  * @private
  * @returns {Object} The new state of the feature base/connection after the
  * reduction of the specified action.
  */
 function _connectionEstablished(
-        state: Object,
+        state: IConnectionState,
         { connection, timeEstablished }: {
             connection: Object,
             timeEstablished: number
@@ -101,14 +116,14 @@ function _connectionEstablished(
  * Reduces a specific Redux action CONNECTION_FAILED of the feature
  * base/connection.
  *
- * @param {Object} state - The Redux state of the feature base/connection.
+ * @param {IConnectionState} state - The Redux state of the feature base/connection.
  * @param {Action} action - The Redux action CONNECTION_FAILED to reduce.
  * @private
  * @returns {Object} The new state of the feature base/connection after the
  * reduction of the specified action.
  */
 function _connectionFailed(
-        state: Object,
+        state: IConnectionState,
         { connection, error }: {
             connection: Object,
             error: ConnectionFailedError
@@ -133,14 +148,14 @@ function _connectionFailed(
  * Reduces a specific Redux action CONNECTION_WILL_CONNECT of the feature
  * base/connection.
  *
- * @param {Object} state - The Redux state of the feature base/connection.
+ * @param {IConnectionState} state - The Redux state of the feature base/connection.
  * @param {Action} action - The Redux action CONNECTION_WILL_CONNECT to reduce.
  * @private
  * @returns {Object} The new state of the feature base/connection after the
  * reduction of the specified action.
  */
 function _connectionWillConnect(
-        state: Object,
+        state: IConnectionState,
         { connection }: { connection: Object }) {
     return assign(state, {
         connecting: connection,
@@ -159,12 +174,12 @@ function _connectionWillConnect(
  * The current (similar to getCurrentConference in base/conference/functions.any.js)
  * connection which is {@code connection} or {@code connecting}.
  *
- * @param {Object} baseConnectionState - The current state of the
+ * @param {IConnectionState} baseConnectionState - The current state of the
  * {@code 'base/connection'} feature.
  * @returns {JitsiConnection} - The current {@code JitsiConnection} if any.
  * @private
  */
-function _getCurrentConnection(baseConnectionState: Object): ?Object {
+function _getCurrentConnection(baseConnectionState: IConnectionState): IConnectionState|undefined {
     return baseConnectionState.connection || baseConnectionState.connecting;
 }
 
@@ -172,15 +187,15 @@ function _getCurrentConnection(baseConnectionState: Object): ?Object {
  * Reduces a specific redux action {@link SET_LOCATION_URL} of the feature
  * base/connection.
  *
- * @param {Object} state - The redux state of the feature base/connection.
+ * @param {IConnectionState} state - The redux state of the feature base/connection.
  * @param {Action} action - The redux action {@code SET_LOCATION_URL} to reduce.
  * @private
  * @returns {Object} The new state of the feature base/connection after the
  * reduction of the specified action.
  */
 function _setLocationURL(
-        state: Object,
-        { locationURL }: { locationURL: ?URL }) {
+        state: IConnectionState,
+        { locationURL }: { locationURL?: URL }) {
     return set(state, 'locationURL', locationURL);
 }
 
@@ -188,12 +203,12 @@ function _setLocationURL(
  * Reduces a specific redux action {@link SET_ROOM} of the feature
  * base/connection.
  *
- * @param {Object} state - The redux state of the feature base/connection.
+ * @param {IConnectionState} state - The redux state of the feature base/connection.
  * @private
  * @returns {Object} The new state of the feature base/connection after the
  * reduction of the specified action.
  */
-function _setRoom(state: Object) {
+function _setRoom(state: IConnectionState) {
     return assign(state, {
         error: undefined,
         passwordRequired: undefined
@@ -204,14 +219,14 @@ function _setRoom(state: Object) {
  * Reduces a specific redux action {@link SHOW_CONNECTION_INFO} of the feature
  * base/connection.
  *
- * @param {Object} state - The redux state of the feature base/connection.
+ * @param {IConnectionState} state - The redux state of the feature base/connection.
  * @param {Action} action - The redux action {@code SHOW_CONNECTION_INFO} to reduce.
  * @private
  * @returns {Object} The new state of the feature base/connection after the
  * reduction of the specified action.
  */
 function _setShowConnectionInfo(
-        state: Object,
+        state: IConnectionState,
         { showConnectionInfo }: { showConnectionInfo: boolean }) {
     return set(state, 'showConnectionInfo', showConnectionInfo);
 }
diff --git a/react/features/base/redux/functions.js b/react/features/base/redux/functions.ts
similarity index 79%
rename from react/features/base/redux/functions.js
rename to react/features/base/redux/functions.ts
index ad9beccb8..a0b268c11 100644
--- a/react/features/base/redux/functions.js
+++ b/react/features/base/redux/functions.ts
@@ -1,22 +1,22 @@
-// @flow
-
 import _ from 'lodash';
 import { connect as reduxConnect } from 'react-redux';
 
+import { IStore } from '../../app/types';
+
 /**
  * Sets specific properties of a specific state to specific values and prevents
  * unnecessary state changes.
  *
- * @param {Object} target - The state on which the specified properties are to
+ * @param {T} target - The state on which the specified properties are to
  * be set.
- * @param {Object} source - The map of properties to values which are to be set
+ * @param {T} source - The map of properties to values which are to be set
  * on the specified target.
- * @returns {Object} The specified target if the values of the specified
+ * @returns {T} The specified target if the values of the specified
  * properties equal the specified values; otherwise, a new state constructed
  * from the specified target by setting the specified properties to the
  * specified values.
  */
-export function assign(target: Object, source: Object) {
+export function assign<T extends Object>(target: T, source: T): T {
     let t = target;
 
     for (const property in source) { // eslint-disable-line guard-for-in
@@ -30,13 +30,13 @@ export function assign(target: Object, source: Object) {
  * Wrapper function for the react-redux connect function to avoid having to
  * declare function types for flow, but still let flow warn for other errors.
  *
- * @param {Function?} mapStateToProps - Redux mapStateToProps function.
+ * @param {any} mapStateToProps - Redux mapStateToProps function.
  * @param {Function?} mapDispatchToProps - Redux mapDispatchToProps function.
  * @returns {Connector}
  */
 export function connect(
-        mapStateToProps?: Function, mapDispatchToProps?: Function) {
-    return reduxConnect<*, *, *, *, *, *>(mapStateToProps, mapDispatchToProps);
+        mapStateToProps?: any, mapDispatchToProps?: Function) {
+    return reduxConnect(mapStateToProps, mapDispatchToProps);
 }
 
 /**
@@ -57,18 +57,18 @@ export function equals(a: any, b: any) {
  * unnecessary state changes (when the specified {@code value} is equal to the
  * value of the specified {@code property} of the specified {@code state}).
  *
- * @param {Object} state - The (Redux) state from which a new state is to be
+ * @param {T} state - The (Redux) state from which a new state is to be
  * constructed by setting the specified {@code property} to the specified
  * {@code value}.
  * @param {string} property - The property of {@code state} which is to be
  * assigned the specified {@code value} (in the new state).
  * @param {*} value - The value to assign to the specified {@code property}.
- * @returns {Object} The specified {@code state} if the value of the specified
+ * @returns {T} The specified {@code state} if the value of the specified
  * {@code property} equals the specified <tt>value/tt>; otherwise, a new state
  * constructed from the specified {@code state} by setting the specified
  * {@code property} to the specified {@code value}.
  */
-export function set(state: Object, property: string, value: any) {
+export function set<T extends Object>(state: T, property: keyof T, value: any): T {
     return _set(state, property, value, /* copyOnWrite */ true);
 }
 
@@ -79,7 +79,7 @@ export function set(state: Object, property: string, value: any) {
  * unnecessary state changes (when the specified {@code value} is equal to the
  * value of the specified {@code property} of the specified {@code state}).
  *
- * @param {Object} state - The (Redux) state from which a state is to be
+ * @param {T} state - The (Redux) state from which a state is to be
  * constructed by setting the specified {@code property} to the specified
  * {@code value}.
  * @param {string} property - The property of {@code state} which is to be
@@ -87,17 +87,17 @@ export function set(state: Object, property: string, value: any) {
  * @param {*} value - The value to assign to the specified {@code property}.
  * @param {boolean} copyOnWrite - If the specified {@code state} is to not be
  * modified, {@code true}; otherwise, {@code false}.
- * @returns {Object} The specified {@code state} if the value of the specified
+ * @returns {T} The specified {@code state} if the value of the specified
  * {@code property} equals the specified <tt>value/tt> or {@code copyOnWrite}
  * is truthy; otherwise, a new state constructed from the specified
  * {@code state} by setting the specified {@code property} to the specified
  * {@code value}.
  */
-function _set(
-        state: Object,
-        property: string,
+function _set<T extends Object>(
+        state: T,
+        property: keyof T,
         value: any,
-        copyOnWrite: boolean) {
+        copyOnWrite: boolean): T {
     // Delete state properties that are to be set to undefined. (It is a matter
     // of personal preference, mostly.)
     if (typeof value === 'undefined'
@@ -130,12 +130,12 @@ function _set(
  * be related to the redux state (e.g. The redux store, the redux
  * {@code getState} function).
  *
- * @param {Function|Object} stateful - The entity such as the redux store or the
+ * @param {Function|IStore} stateful - The entity such as the redux store or the
  * redux {@code getState} function from which the redux state is to be
  * returned.
  * @returns {Object} The redux state.
  */
-export function toState(stateful: Function | Object) {
+export function toState(stateful: Function | IStore) {
     if (stateful) {
         if (typeof stateful === 'function') {
             return stateful();