Fix lint errors

app/src/CustomPropTypes.js

@@ -0,0 +1,11 @@
+import PropTypes from 'prop-types';
+
+const GetTopicResult = PropTypes.PropTypes.shape({
+  0: PropTypes.string,
+  1: PropTypes.string,
+  2: PropTypes.string,
+  3: PropTypes.string,
+  4: PropTypes.arrayOf(PropTypes.number)
+});
+
+export { GetTopicResult };

app/src/components/FloatingButton.js

@@ -1,12 +1,17 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import { Button, Icon } from 'semantic-ui-react';
 
-const FloatingButton = props => (
+const FloatingButton = ({ onClick }) => (
-  <div className="action-button" onClick={props.onClick}>
+  <div className="action-button" role="button" onClick={onClick} onKeyUp={onClick} tabIndex={0}>
     <Button icon color="teal" size="large">
       <Icon name="add" />
     </Button>
   </div>
 );
 
+FloatingButton.propTypes = {
+  onClick: PropTypes.func.isRequired
+};
+
 export default FloatingButton;

app/src/components/LoadingSpinner.js

@@ -1,11 +1,12 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 
-const LoadingSpinner = props => (
+const LoadingSpinner = ({ className, style }) => (
   <div className="vertical-center-children">
     <div
       className={`center-in-parent ${
-        props.className ? props.className : ''}`}
+        className ? className : ''}`}
-      style={props.style ? props.style : []}
+      style={style ? style : []}
     >
       <p>
         <i className="fas fa-spinner fa-3x fa-spin" />
@@ -14,4 +15,9 @@ const LoadingSpinner = props => (
   </div>
 );
 
+LoadingSpinner.propTypes = {
+  className: PropTypes.string,
+  style: PropTypes.string
+};
+
 export default LoadingSpinner;

app/src/components/NewPost.js

@@ -1,4 +1,5 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 
 import { Button, Divider, Form, Grid, Icon, TextArea } from 'semantic-ui-react';
@@ -10,8 +11,9 @@ import ReactMarkdown from 'react-markdown';
 import { createPost } from '../redux/actions/transactionsActions';
 
 class NewPost extends Component {
-  constructor(props, context) {
+  constructor(props) {
     super(props);
+    const { subject } = props;
 
     this.handleInputChange = this.handleInputChange.bind(this);
     this.handlePreviewToggle = this.handlePreviewToggle.bind(this);
@@ -20,7 +22,7 @@ class NewPost extends Component {
     this.newPostOuterRef = React.createRef();
 
     this.state = {
-      postSubjectInput: this.props.subject ? this.props.subject : '',
+      postSubjectInput: subject ? subject : '',
       postContentInput: '',
       postSubjectInputEmptySubmit: false,
       postContentInputEmptySubmit: false,
@@ -29,24 +31,41 @@ class NewPost extends Component {
     };
   }
 
+  componentDidMount() {
+    this.newPostOuterRef.current.scrollIntoView(true);
+  }
+
+  getDate() {
+    const currentdate = new Date();
+    return (`${currentdate.getMonth() + 1} ${
+      currentdate.getDate()}, ${
+      currentdate.getFullYear()}, ${
+      currentdate.getHours()}:${
+      currentdate.getMinutes()}:${
+      currentdate.getSeconds()}`);
+  }
+
   async validateAndPost() {
-    if (this.state.postSubjectInput === '' || this.state.postContentInput
+    const { postSubjectInput, postContentInput } = this.state;
+    const { topicID, onPostCreated, dispatch } = this.props;
+
+    if (postSubjectInput === '' || postContentInput
         === '') {
       this.setState({
-        postSubjectInputEmptySubmit: this.state.postSubjectInput === '',
+        postSubjectInputEmptySubmit: postSubjectInput === '',
-        postContentInputEmptySubmit: this.state.postContentInput === ''
+        postContentInputEmptySubmit: postContentInput === ''
       });
       return;
     }
 
-    this.props.dispatch(
+    dispatch(
-      createPost(this.props.topicID,
+      createPost(topicID,
         {
-          postSubject: this.state.postSubjectInput,
+          postSubject: postSubjectInput,
-          postMessage: this.state.postContentInput
+          postMessage: postContentInput
         }),
     );
-    this.props.onPostCreated();
+    onPostCreated();
   }
 
   handleInputChange(event) {
@@ -56,29 +75,25 @@ class NewPost extends Component {
   }
 
   handlePreviewToggle() {
-    this.setState((prevState, props) => ({
+    this.setState(prevState => ({
       previewEnabled: !prevState.previewEnabled,
       previewDate: this.getDate()
     }));
   }
 
-  getDate() {
-    const currentdate = new Date();
-    return (`${currentdate.getMonth() + 1} ${
-      currentdate.getDate()}, ${
-      currentdate.getFullYear()}, ${
-      currentdate.getHours()}:${
-      currentdate.getMinutes()}:${
-      currentdate.getSeconds()}`);
-  }
-
   render() {
+    const {
+      previewDate, postSubjectInputEmptySubmit, postSubjectInput, postContentInputEmptySubmit,
+      postContentInput, previewEnabled
+    } = this.state;
+    const { postIndex, avatarUrl, user, onCancelClick } = this.props;
+
     return (
       <div className="post" ref={this.newPostOuterRef}>
         <Divider horizontal>
           <span className="grey-text">
 #
-            {this.props.postIndex}
+            {postIndex}
           </span>
         </Divider>
         <Grid>
@@ -87,39 +102,39 @@ class NewPost extends Component {
               <UserAvatar
                 size="52"
                 className="inline user-avatar"
-                src={this.props.avatarUrl}
+                src={avatarUrl}
-                name={this.props.user.username}
+                name={user.username}
               />
             </Grid.Column>
             <Grid.Column width={15}>
               <div className="">
                 <div className="stretch-space-between">
-                  <span><strong>{this.props.user.username}</strong></span>
+                  <span><strong>{user.username}</strong></span>
                   <span className="grey-text">
-                    {this.state.previewEnabled
+                    {previewEnabled
-                                        && <TimeAgo date={this.state.previewDate} />
+                                        && <TimeAgo date={previewDate} />
                                         }
                   </span>
                 </div>
                 <div className="stretch-space-between">
                   <span>
                     <strong>
-                      {this.state.previewEnabled
+                      {previewEnabled
                                         && (`Subject: ${
-                                          this.state.postSubjectInput}`)
+                                          postSubjectInput}`)
                                         }
                     </strong>
                   </span>
                 </div>
                 <div className="post-content">
                   <div style={{
-                    display: this.state.previewEnabled
+                    display: previewEnabled
                       ? 'block'
                       : 'none'
                   }}
                   >
                     <ReactMarkdown
-                      source={this.state.postContentInput}
+                      source={postContentInput}
                       className="markdown-preview"
                     />
                   </div>
@@ -127,14 +142,14 @@ class NewPost extends Component {
                     <Form.Input
                       key="postSubjectInput"
                       style={{
-                        display: this.state.previewEnabled
+                        display: previewEnabled
                           ? 'none'
                           : ''
                       }}
                       name="postSubjectInput"
-                      error={this.state.postSubjectInputEmptySubmit}
+                      error={postSubjectInputEmptySubmit}
                       type="text"
-                      value={this.state.postSubjectInput}
+                      value={postSubjectInput}
                       placeholder="Subject"
                       id="postSubjectInput"
                       onChange={this.handleInputChange}
@@ -142,15 +157,15 @@ class NewPost extends Component {
                     <TextArea
                       key="postContentInput"
                       style={{
-                        display: this.state.previewEnabled
+                        display: previewEnabled
                           ? 'none'
                           : ''
                       }}
                       name="postContentInput"
-                      className={this.state.postContentInputEmptySubmit
+                      className={postContentInputEmptySubmit
                         ? 'form-textarea-required'
                         : ''}
-                      value={this.state.postContentInput}
+                      value={postContentInput}
                       placeholder="Post"
                       id="postContentInput"
                       onChange={this.handleInputChange}
@@ -177,11 +192,11 @@ class NewPost extends Component {
                         onClick={this.handlePreviewToggle}
                         color="yellow"
                       >
-                        {this.state.previewEnabled ? 'Edit' : 'Preview'}
+                        {previewEnabled ? 'Edit' : 'Preview'}
                       </Button>
                       <Button
                         type="button"
-                        onClick={this.props.onCancelClick}
+                        onClick={onCancelClick}
                         color="red"
                       >
                           Cancel
@@ -196,12 +211,19 @@ class NewPost extends Component {
       </div>
     );
   }
-
-  componentDidMount() {
-    this.newPostOuterRef.current.scrollIntoView(true);
-  }
 }
 
+NewPost.propTypes = {
+  subject: PropTypes.string,
+  topicID: PropTypes.number.isRequired,
+  postIndex: PropTypes.number.isRequired,
+  avatarUrl: PropTypes.string,
+  user: PropTypes.object.isRequired,
+  onCancelClick: PropTypes.func.isRequired,
+  dispatch: PropTypes.func.isRequired,
+  onPostCreated: PropTypes.func.isRequired
+};
+
 const mapStateToProps = state => ({
   orbitDB: state.orbitDB,
   user: state.user

app/src/components/NewTopicPreview.js

@@ -1,4 +1,5 @@
-import React, { Component } from 'react';
+import React from 'react';
+import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 
 import { Divider, Grid } from 'semantic-ui-react';
@@ -7,13 +8,7 @@ import TimeAgo from 'react-timeago';
 import UserAvatar from 'react-user-avatar';
 import ReactMarkdown from 'react-markdown';
 
-class Post extends Component {
+const Post = ({ user, date, subject, content }) => (
-  constructor(props, context) {
-    super(props);
-  }
-
-  render() {
-    return (
   <div className="post">
     <Divider horizontal>
       <span className="grey-text">#0</span>
@@ -24,8 +19,8 @@ class Post extends Component {
           <UserAvatar
             size="52"
             className="inline"
-                src={this.props.user.avatarUrl}
+            src={user.avatarUrl}
-                name={this.props.user.username}
+            name={user.username}
           />
         </Grid.Column>
         <Grid.Column width={15}>
@@ -33,11 +28,11 @@ class Post extends Component {
             <div className="stretch-space-between">
               <span>
                 <strong>
-                      {this.props.user.username}
+                  {user.username}
                 </strong>
               </span>
               <span className="grey-text">
-                    <TimeAgo date={this.props.date} />
+                <TimeAgo date={date} />
               </span>
             </div>
             <div className="stretch-space-between">
@@ -45,12 +40,12 @@ class Post extends Component {
                 <strong>
                                         Subject:
                   {' '}
-                      {this.props.subject}
+                  {subject}
                 </strong>
               </span>
             </div>
             <div className="post-content">
-                  <ReactMarkdown source={this.props.content} />
+              <ReactMarkdown source={content} />
             </div>
           </div>
         </Grid.Column>
@@ -58,8 +53,13 @@ class Post extends Component {
     </Grid>
   </div>
 );
-  }
+
-}
+Post.propTypes = {
+  subject: PropTypes.string,
+  date: PropTypes.string,
+  content: PropTypes.string,
+  user: PropTypes.object.isRequired
+};
 
 const mapStateToProps = state => ({
   user: state.user

app/src/components/Post.js

@@ -1,4 +1,5 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 import { bindActionCreators } from 'redux';
 import { push } from 'connected-react-router';
 import { Link, withRouter } from 'react-router-dom';
@@ -16,9 +17,11 @@ class Post extends Component {
   constructor(props) {
     super(props);
 
+    const { getFocus } = props;
+
     this.getBlockchainData = this.getBlockchainData.bind(this);
     this.fetchPost = this.fetchPost.bind(this);
-    if (props.getFocus) {
+    if (getFocus) {
       this.postRef = React.createRef();
     }
 
@@ -31,24 +34,55 @@ class Post extends Component {
     };
   }
 
+  componentDidMount() {
+    this.getBlockchainData();
+  }
+
+  componentDidUpdate() {
+    this.getBlockchainData();
+    const { readyForAnimation } = this.state;
+    if (readyForAnimation) {
+      if (this.postRef) {
+        setTimeout(() => {
+          this.postRef.current.scrollIntoView(
+            {
+              block: 'start', behavior: 'smooth'
+            },
+          );
+          setTimeout(() => {
+            this.setState({
+              animateOnToggle: false
+            });
+          }, 300);
+        }, 100);
+        this.setState({
+          readyForAnimation: false
+        });
+      }
+    }
+  }
+
   getBlockchainData() {
-    if (this.props.postData
+    const { fetchPostDataStatus } = this.state;
-        && this.props.orbitDB.orbitdb
+    const { postData, orbitDB, postID } = this.props;
-        && this.state.fetchPostDataStatus === 'pending') {
+
+    if (postData && orbitDB.orbitdb && fetchPostDataStatus === 'pending') {
       this.setState({
         fetchPostDataStatus: 'fetching'
       });
-      this.fetchPost(this.props.postID);
+      this.fetchPost(postID);
     }
   }
 
   async fetchPost(postID) {
+    const { user, postData, orbitDB } = this.props;
     let orbitPostData;
-    if (this.props.postData.value[1] === this.props.user.address) {
+
-      orbitPostData = this.props.orbitDB.postsDB.get(postID);
+    if (postData.value[1] === user.address) {
+      orbitPostData = orbitDB.postsDB.get(postID);
     } else {
-      const fullAddress = `/orbitdb/${this.props.postData.value[0]}/posts`;
+      const fullAddress = `/orbitdb/${postData.value[0]}/posts`;
-      const store = await this.props.orbitDB.orbitdb.keyvalue(fullAddress);
+      const store = await orbitDB.orbitdb.keyvalue(fullAddress);
       await store.load();
 
       const localOrbitData = store.get(postID);
@@ -71,13 +105,16 @@ class Post extends Component {
   }
 
   render() {
-    const avatarView = (this.props.postData
+    const { animateOnToggle, postSubject, postContent } = this.state;
+    const { avatarUrl, postIndex, navigateTo, postData, postID } = this.props;
+
+    const avatarView = (postData
       ? (
         <UserAvatar
           size="52"
           className="inline"
-          src={this.props.avatarUrl}
+          src={avatarUrl}
-          name={this.props.postData.value[2]}
+          name={postData.value[2]}
         />
       )
       : (
@@ -99,23 +136,23 @@ class Post extends Component {
       <Transition
         animation="tada"
         duration={500}
-        visible={this.state.animateOnToggle}
+        visible={animateOnToggle}
       >
         <div className="post" ref={this.postRef ? this.postRef : null}>
           <Divider horizontal>
             <span className="grey-text">
 #
-              {this.props.postIndex}
+              {postIndex}
             </span>
           </Divider>
           <Grid>
             <Grid.Row columns={16} stretched>
               <Grid.Column width={1} className="user-avatar">
-                {this.props.postData !== null
+                {postData !== null
                   ? (
                     <Link
-                      to={`/profile/${this.props.postData.value[1]
+                      to={`/profile/${postData.value[1]
-                      }/${this.props.postData.value[2]}`}
+                      }/${postData.value[2]}`}
                       onClick={(event) => { event.stopPropagation(); }}
                     >
                       {avatarView}
@@ -127,21 +164,21 @@ class Post extends Component {
               <Grid.Column width={15}>
                 <div className="">
                   <div className="stretch-space-between">
-                    <span className={this.props.postData
+                    <span className={postData
                                         !== null ? '' : 'grey-text'}
                     >
                       <strong>
-                        {this.props.postData !== null
+                        {postData !== null
-                          ? this.props.postData.value[2]
+                          ? postData.value[2]
                           : 'Username'
                                                 }
                       </strong>
                     </span>
                     <span className="grey-text">
-                      {this.props.postData !== null
+                      {postData !== null
                                             && (
                                             <TimeAgo date={epochTimeConverter(
-                                              this.props.postData.value[3],
+                                              postData.value[3],
                                             )}
                                             />
                                             )
@@ -150,11 +187,11 @@ class Post extends Component {
                   </div>
                   <div className="stretch-space-between">
                     <span
-                      className={this.state.postSubject
+                      className={postSubject
                                             === '' ? '' : 'grey-text'}
                     >
                       <strong>
-                        {this.state.postSubject === ''
+                        {postSubject === ''
                           ? (
                             <ContentLoader
                               height={5.8}
@@ -174,14 +211,14 @@ class Post extends Component {
                             </ContentLoader>
                           )
                           : `Subject: ${
-                            this.state.postSubject}`
+                            postSubject}`
                                                 }
                       </strong>
                     </span>
                   </div>
                   <div className="post-content">
-                    {this.state.postContent !== ''
+                    {postContent !== ''
-                      ? <ReactMarkdown source={this.state.postContent} />
+                      ? <ReactMarkdown source={postContent} />
                       : (
                         <ContentLoader
                           height={11.2}
@@ -231,11 +268,11 @@ class Post extends Component {
                 <Button
                   icon
                   size="mini"
-                  onClick={this.props.postData
+                  onClick={postData
                     ? () => {
-                      this.props.navigateTo(`/topic/${
+                      navigateTo(`/topic/${
-                        this.props.postData.value[4]}/${
+                        postData.value[4]}/${
-                        this.props.postID}`);
+                        postID}`);
                     }
                     : () => {}}
                 >
@@ -248,34 +285,18 @@ class Post extends Component {
       </Transition>
     );
   }
-
-  componentDidMount() {
-    this.getBlockchainData();
 }
 
-  componentDidUpdate() {
+Post.propTypes = {
-    this.getBlockchainData();
+  getFocus: PropTypes.bool.isRequired,
-    if (this.state.readyForAnimation) {
+  user: PropTypes.object.isRequired,
-      if (this.postRef) {
+  orbitDB: PropTypes.object.isRequired,
-        setTimeout(() => {
+  avatarUrl: PropTypes.string,
-          this.postRef.current.scrollIntoView(
+  postIndex: PropTypes.number.isRequired,
-            {
+  navigateTo: PropTypes.func.isRequired,
-              block: 'start', behavior: 'smooth'
+  postData: PropTypes.object,
-            },
+  postID: PropTypes.string.isRequired
-          );
+};
-          setTimeout(() => {
-            this.setState({
-              animateOnToggle: false
-            });
-          }, 300);
-        }, 100);
-        this.setState({
-          readyForAnimation: false
-        });
-      }
-    }
-  }
-}
 
 const mapDispatchToProps = dispatch => bindActionCreators({
   navigateTo: location => push(location)

app/src/components/PostList.js

@@ -1,4 +1,5 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 import { drizzle } from '../index';
 
@@ -18,31 +19,6 @@ class PostList extends Component {
     };
   }
 
-  render() {
-    const posts = this.props.postIDs.map((postID, index) => (
-      <Post
-        postData={(this.state.dataKeys[postID]
-              && this.props.contracts[contract][getPostMethod][this.state.dataKeys[postID]])
-          ? this.props.contracts[contract][getPostMethod][this.state.dataKeys[postID]]
-          : null}
-        avatarUrl=""
-        postIndex={index}
-        postID={postID}
-        getFocus={this.props.focusOnPost === postID}
-        key={postID}
-      />
-    ));
-
-    return (
-      <div>
-        {this.props.recentToTheTop
-          ? posts.slice(0).reverse()
-          : posts
-          }
-      </div>
-    );
-  }
-
   componentDidMount() {
     this.getBlockchainData();
   }
@@ -52,12 +28,15 @@ class PostList extends Component {
   }
 
   getBlockchainData() {
-    if (this.props.drizzleStatus.initialized) {
+    const { dataKeys } = this.state;
-      const dataKeysShallowCopy = this.state.dataKeys.slice();
+    const { drizzleStatus, postIDs } = this.props;
+
+    if (drizzleStatus.initialized) {
+      const dataKeysShallowCopy = dataKeys.slice();
       let fetchingNewData = false;
 
-      this.props.postIDs.forEach((postID) => {
+      postIDs.forEach((postID) => {
-        if (!this.state.dataKeys[postID]) {
+        if (!dataKeys[postID]) {
           dataKeysShallowCopy[postID] = drizzle.contracts[contract].methods[getPostMethod].cacheCall(
             postID,
           );
@@ -72,8 +51,44 @@ class PostList extends Component {
       }
     }
   }
+
+  render() {
+    const { dataKeys } = this.state;
+    const { postIDs, contracts, focusOnPost, recentToTheTop } = this.props;
+
+    const posts = postIDs.map((postID, index) => (
+      <Post
+        postData={(dataKeys[postID]
+              && contracts[contract][getPostMethod][dataKeys[postID]])
+          ? contracts[contract][getPostMethod][dataKeys[postID]]
+          : null}
+        avatarUrl=""
+        postIndex={index}
+        postID={postID}
+        getFocus={focusOnPost === postID}
+        key={postID}
+      />
+    ));
+
+    return (
+      <div>
+        {recentToTheTop
+          ? posts.slice(0).reverse()
+          : posts
+          }
+      </div>
+    );
+  }
 }
 
+PostList.propTypes = {
+  drizzleStatus: PropTypes.object.isRequired,
+  postIDs: PropTypes.array.isRequired,
+  contracts: PropTypes.array.isRequired,
+  focusOnPost: PropTypes.number,
+  recentToTheTop: PropTypes.bool
+};
+
 const mapStateToProps = state => ({
   contracts: state.contracts,
   drizzleStatus: state.drizzleStatus

app/src/components/ProfileInformation.js

@@ -1,4 +1,5 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 import UserAvatar from 'react-user-avatar';
 import { drizzle } from '../index';
@@ -30,12 +31,23 @@ class ProfileInformation extends Component {
     };
   }
 
+  componentDidMount() {
+    this.getBlockchainData();
+  }
+
+  componentDidUpdate() {
+    this.getBlockchainData();
+  }
+
   getBlockchainData() {
-    if (this.state.pageStatus === 'initialized'
+    const { pageStatus, dateOfRegister, orbitDBId } = this.state;
-        && this.props.drizzleStatus.initialized) {
+    const { drizzleStatus, address, contracts } = this.props;
+
+    if (pageStatus === 'initialized'
+        && drizzleStatus.initialized) {
       callsInfo.forEach((call, index) => {
         this.dataKey[index] = drizzle.contracts[call.contract].methods[call.method].cacheCall(
-          this.props.address,
+          address,
         );
       });
       this.setState({
@@ -43,32 +55,32 @@ class ProfileInformation extends Component {
       });
     }
 
-    if (this.state.pageStatus === 'loading') {
+    if (pageStatus === 'loading') {
-      let pageStatus = 'loaded';
+      let pageStatusUpdate = 'loaded';
       callsInfo.forEach((call, index) => {
-        if (!this.props.contracts[call.contract][call.method][this.dataKey[index]]) {
+        if (!contracts[call.contract][call.method][this.dataKey[index]]) {
-          pageStatus = 'loading';
+          pageStatusUpdate = 'loading';
         }
       });
 
-      if (pageStatus === 'loaded') {
+      if (pageStatusUpdate === 'loaded') {
         this.setState({
-          pageStatus
+          pageStatus: pageStatusUpdate
         });
       }
     }
 
-    if (this.state.pageStatus === 'loaded') {
+    if (pageStatus === 'loaded') {
-      if (this.state.dateOfRegister === '') {
+      if (dateOfRegister === '') {
-        const transaction = this.props.contracts[callsInfo[0].contract][callsInfo[0].method][this.dataKey[0]];
+        const transaction = contracts[callsInfo[0].contract][callsInfo[0].method][this.dataKey[0]];
         if (transaction) {
           this.setState({
             dateOfRegister: transaction.value
           });
         }
       }
-      if (this.state.orbitDBId === '') {
+      if (orbitDBId === '') {
-        const transaction = this.props.contracts[callsInfo[1].contract][callsInfo[1].method][this.dataKey[1]];
+        const transaction = contracts[callsInfo[1].contract][callsInfo[1].method][this.dataKey[1]];
         if (transaction) {
           this.setState({
             orbitDBId: transaction.value
@@ -79,61 +91,67 @@ class ProfileInformation extends Component {
   }
 
   render() {
+    const { orbitDBId, dateOfRegister } = this.state;
+    const { avatarUrl, username, address, numberOfTopics, numberOfPosts, self } = this.props;
+
     return (
       <div className="user-info">
-        {this.props.avatarUrl && (
+        {avatarUrl && (
           <UserAvatar
             size="40"
             className="inline user-avatar"
-            src={this.props.avatarUrl}
+            src={avatarUrl}
-            name={this.props.username}
+            name={username}
           />
         )}
         <table className="highlight centered responsive-table">
           <tbody>
             <tr>
               <td><strong>Username:</strong></td>
-              <td>{this.props.username}</td>
+              <td>{username}</td>
             </tr>
             <tr>
               <td><strong>Account address:</strong></td>
-              <td>{this.props.address}</td>
+              <td>{address}</td>
             </tr>
             <tr>
               <td><strong>OrbitDB:</strong></td>
-              <td>{this.state.orbitDBId}</td>
+              <td>{orbitDBId}</td>
             </tr>
             <tr>
               <td><strong>Number of topics created:</strong></td>
-              <td>{this.props.numberOfTopics}</td>
+              <td>{numberOfTopics}</td>
             </tr>
             <tr>
               <td><strong>Number of posts:</strong></td>
-              <td>{this.props.numberOfPosts}</td>
+              <td>{numberOfPosts}</td>
             </tr>
-            {this.state.dateOfRegister
+            {dateOfRegister
             && (
             <tr>
               <td><strong>Member since:</strong></td>
-              <td>{epochTimeConverter(this.state.dateOfRegister)}</td>
+              <td>{epochTimeConverter(dateOfRegister)}</td>
             </tr>
             )
             }
           </tbody>
         </table>
-        {this.props.self && <UsernameFormContainer />}
+        {self && <UsernameFormContainer />}
       </div>
     );
   }
-
-  componentDidMount() {
-    this.getBlockchainData();
 }
 
-  componentDidUpdate() {
+ProfileInformation.propTypes = {
-    this.getBlockchainData();
+  drizzleStatus: PropTypes.object.isRequired,
-  }
+  contracts: PropTypes.array.isRequired,
-}
+  avatarUrl: PropTypes.string,
+  username: PropTypes.string.isRequired,
+  address: PropTypes.string.isRequired,
+  numberOfTopics: PropTypes.number.isRequired,
+  numberOfPosts: PropTypes.number.isRequired,
+  self: PropTypes.bool
+};
 
 const mapStateToProps = state => ({
   drizzleStatus: state.drizzleStatus,

app/src/components/Topic.js

@@ -1,4 +1,6 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
+import { GetTopicResult } from '../CustomPropTypes'
 import { connect } from 'react-redux';
 import { withRouter } from 'react-router-dom';
 
@@ -20,16 +22,41 @@ class Topic extends Component {
     };
   }
 
+  componentDidMount() {
+    const { topicSubjectFetchStatus } = this.state;
+    const { topicData, orbitDB, topicID } = this.props;
+
+    if (topicData !== null
+        && topicSubjectFetchStatus === 'pending'
+        && orbitDB.ipfsInitialized
+        && orbitDB.orbitdb) {
+      this.fetchSubject(topicID);
+    }
+  }
+
+  componentDidUpdate() {
+    const { topicSubjectFetchStatus } = this.state;
+    const { topicData, orbitDB, topicID } = this.props;
+
+    if (topicData !== null
+        && topicSubjectFetchStatus === 'pending'
+        && orbitDB.ipfsInitialized
+        && orbitDB.orbitdb) {
+      this.fetchSubject(topicID);
+    }
+  }
+
   async fetchSubject(topicID) {
+    const { topicData, user, orbitDB } = this.props;
     let topicSubject;
 
-    if (this.props.topicData.value[1] === this.props.user.address) {
+    if (topicData.value[1] === user.address) {
-      const orbitData = this.props.orbitDB.topicsDB.get(topicID);
+      const orbitData = orbitDB.topicsDB.get(topicID);
       topicSubject = orbitData.subject;
     } else {
-      const fullAddress = `/orbitdb/${this.props.topicData.value[0]
+      const fullAddress = `/orbitdb/${topicData.value[0]
       }/topics`;
-      const store = await this.props.orbitDB.orbitdb.keyvalue(fullAddress);
+      const store = await orbitDB.orbitdb.keyvalue(fullAddress);
       await store.load();
 
       const localOrbitData = store.get(topicID);
@@ -50,21 +77,24 @@ class Topic extends Component {
   }
 
   render() {
+    const { topicSubject } = this.state;
+    const { history, topicID, topicData } = this.props;
+
     return (
       <Card
         link
         className="card"
         onClick={() => {
-          this.props.history.push(`/topic/${this.props.topicID}`);
+          history.push(`/topic/${topicID}`);
         }}
       >
         <Card.Content>
           <div className={`topic-subject${
-            this.state.topicSubject ? '' : ' grey-text'}`}
+            topicSubject ? '' : ' grey-text'}`}
           >
             <p>
               <strong>
-                {this.state.topicSubject !== null ? this.state.topicSubject
+                {topicSubject !== null ? topicSubject
                   : (
                     <ContentLoader
                       height={5.8}
@@ -82,26 +112,26 @@ class Topic extends Component {
           <hr />
           <div className="topic-meta">
             <p className={`no-margin${
-              this.props.topicData !== null ? '' : ' grey-text'}`}
+              topicData !== null ? '' : ' grey-text'}`}
             >
-              {this.props.topicData !== null
+              {topicData !== null
-                ? this.props.topicData.value[2]
+                ? topicData.value[2]
                 : 'Username'
                 }
             </p>
             <p className={`no-margin${
-              this.props.topicData !== null ? '' : ' grey-text'}`}
+              topicData !== null ? '' : ' grey-text'}`}
             >
-              {`Number of replies: ${this.props.topicData !== null
+              {`Number of replies: ${topicData !== null
-                ? this.props.topicData.value[4].length
+                ? topicData.value[4].length
                 : ''}`
                 }
             </p>
             <p className="topic-date grey-text">
-              {this.props.topicData !== null
+              {topicData !== null
                 && (
                 <TimeAgo
-                  date={epochTimeConverter(this.props.topicData.value[3])}
+                  date={epochTimeConverter(topicData.value[3])}
                 />
                 )
                 }
@@ -111,25 +141,15 @@ class Topic extends Component {
       </Card>
     );
   }
-
-  componentDidMount() {
-    if (this.props.topicData !== null
-        && this.state.topicSubjectFetchStatus === 'pending'
-        && this.props.orbitDB.ipfsInitialized
-        && this.props.orbitDB.orbitdb) {
-      this.fetchSubject(this.props.topicID);
-    }
 }
 
-  componentDidUpdate() {
+Topic.propTypes = {
-    if (this.props.topicData !== null
+  user: PropTypes.object.isRequired,
-        && this.state.topicSubjectFetchStatus === 'pending'
+  history: PropTypes.object.isRequired,
-        && this.props.orbitDB.ipfsInitialized
+  topicData: GetTopicResult.isRequired,
-        && this.props.orbitDB.orbitdb) {
+  orbitDB: PropTypes.object.isRequired,
-      this.fetchSubject(this.props.topicID);
+  topicID: PropTypes.string.isRequired
-    }
+};
-  }
-}
 
 const mapStateToProps = state => ({
   user: state.user,

app/src/components/TopicList.js

@@ -1,4 +1,5 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 import { drizzle } from '../index';
 
@@ -18,16 +19,26 @@ class TopicList extends Component {
     };
   }
 
+  componentDidMount() {
+    this.getBlockchainData();
+  }
+
+  componentDidUpdate() {
+    this.getBlockchainData();
+  }
+
   getBlockchainData() {
-    if (this.props.drizzleStatus.initialized) {
+    const { dataKeys } = this.state;
-      const dataKeysShallowCopy = this.state.dataKeys.slice();
+    const { drizzleStatus, topicIDs } = this.props;
+
+    if (drizzleStatus.initialized) {
+      const dataKeysShallowCopy = dataKeys.slice();
       let fetchingNewData = false;
 
-      this.props.topicIDs.forEach((topicID) => {
+      topicIDs.forEach((topicID) => {
-        if (!this.state.dataKeys[topicID]) {
+        if (!dataKeys[topicID]) {
-          dataKeysShallowCopy[topicID] = drizzle.contracts[contract].methods[getTopicMethod].cacheCall(
+          dataKeysShallowCopy[topicID] = drizzle.contracts[contract].methods[getTopicMethod]
-            topicID,
+            .cacheCall(topicID);
-          );
           fetchingNewData = true;
         }
       });
@@ -41,11 +52,14 @@ class TopicList extends Component {
   }
 
   render() {
-    const topics = this.props.topicIDs.map(topicID => (
+    const { dataKeys } = this.state;
+    const { topicIDs, contracts } = this.props;
+
+    const topics = topicIDs.map(topicID => (
       <Topic
-        topicData={(this.state.dataKeys[topicID]
+        topicData={(dataKeys[topicID]
-              && this.props.contracts[contract][getTopicMethod][this.state.dataKeys[topicID]])
+              && contracts[contract][getTopicMethod][dataKeys[topicID]])
-          ? this.props.contracts[contract][getTopicMethod][this.state.dataKeys[topicID]]
+          ? contracts[contract][getTopicMethod][dataKeys[topicID]]
           : null}
         topicID={topicID}
         key={topicID}
@@ -58,15 +72,13 @@ class TopicList extends Component {
       </div>
     );
   }
-
-  componentDidMount() {
-    this.getBlockchainData();
 }
 
-  componentDidUpdate() {
+TopicList.propTypes = {
-    this.getBlockchainData();
+  topicIDs: PropTypes.arrayOf(PropTypes.string).isRequired,
-  }
+  contracts: PropTypes.PropTypes.objectOf(PropTypes.object).isRequired,
-}
+  drizzleStatus: PropTypes.object.isRequired
+};
 
 const mapStateToProps = state => ({
   contracts: state.contracts,

app/src/containers/BoardContainer.js

@@ -1,4 +1,5 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 import { withRouter } from 'react-router-dom';
 
@@ -27,16 +28,27 @@ class BoardContainer extends Component {
     };
   }
 
+  componentDidMount() {
+    this.getBlockchainData();
+  }
+
+  componentDidUpdate() {
+    this.getBlockchainData();
+  }
+
   getBlockchainData() {
-    if (this.state.pageStatus === 'initialized'
+    const { pageStatus } = this.state;
-        && this.props.drizzleStatus.initialized) {
+    const { drizzleStatus, contracts } = this.props;
+
+    if (pageStatus === 'initialized'
+        && drizzleStatus.initialized) {
       this.dataKey = drizzle.contracts[contract].methods[getNumberOfTopicsMethod].cacheCall();
       this.setState({
         pageStatus: 'loading'
       });
     }
-    if (this.state.pageStatus === 'loading'
+    if (pageStatus === 'loading'
-        && this.props.contracts[contract][getNumberOfTopicsMethod][this.dataKey]) {
+        && contracts[contract][getNumberOfTopicsMethod][this.dataKey]) {
       this.setState({
         pageStatus: 'loaded'
       });
@@ -45,13 +57,17 @@ class BoardContainer extends Component {
   }
 
   handleCreateTopicClick() {
-    this.props.history.push('/startTopic');
+    const { history } = this.props;
+    history.push('/startTopic');
   }
 
   render() {
+    const { pageStatus } = this.state;
+    const { contracts, hasSignedUp } = this.props;
+
     let boardContents;
-    if (this.state.pageStatus === 'loaded') {
+    if (pageStatus === 'loaded') {
-      const numberOfTopics = this.props.contracts[contract][getNumberOfTopicsMethod][this.dataKey].value;
+      const numberOfTopics = contracts[contract][getNumberOfTopicsMethod][this.dataKey].value;
 
       if (numberOfTopics !== '0') {
         this.topicIDs = [];
@@ -61,7 +77,7 @@ class BoardContainer extends Component {
         boardContents = ([
           <TopicList topicIDs={this.topicIDs} key="topicList" />,
           <div className="bottom-overlay-pad" key="pad" />,
-          this.props.hasSignedUp
+          hasSignedUp
           && (
           <FloatingButton
             onClick={this.handleCreateTopicClick}
@@ -69,7 +85,7 @@ class BoardContainer extends Component {
           />
           )
         ]);
-      } else if (!this.props.hasSignedUp) {
+      } else if (!hasSignedUp) {
         boardContents = (
           <div className="vertical-center-in-parent">
             <Header color="teal" textAlign="center" as="h2">
@@ -105,15 +121,14 @@ class BoardContainer extends Component {
       </div>
     );
   }
-
-  componentDidMount() {
-    this.getBlockchainData();
 }
 
-  componentDidUpdate() {
+BoardContainer.propTypes = {
-    this.getBlockchainData();
+  drizzleStatus: PropTypes.object.isRequired,
-  }
+  history: PropTypes.object.isRequired,
-}
+  contracts: PropTypes.objectOf(PropTypes.object).isRequired,
+  hasSignedUp: PropTypes.bool.isRequired
+};
 
 const mapStateToProps = state => ({
   contracts: state.contracts,

app/src/containers/CoreLayoutContainer.js

@@ -1,4 +1,5 @@
-import React, { Component } from 'react';
+import React from 'react';
+import PropTypes from 'prop-types';
 
 import NavBarContainer from './NavBarContainer';
 import RightSideBarContainer from './TransactionsMonitorContainer';
@@ -14,9 +15,7 @@ import '../assets/css/profile-container.css';
 
 /* import TransactionsMonitorContainer from '../../containers/TransactionsMonitorContainer'; */
 
-class CoreLayout extends Component {
+const CoreLayout = ({ children }) => (
-  render() {
-    return (
   <div className="App">
     <NavBarContainer />
     {/* <div className="progress-bar-container"
@@ -29,7 +28,7 @@ class CoreLayout extends Component {
       <aside className="left-side-panel" />
       <div className="main-panel">
         <div className="view-container">
-              {this.props.children}
+          {children}
         </div>
       </div>
       <aside className="right-side-panel">
@@ -38,7 +37,9 @@ class CoreLayout extends Component {
     </div>
   </div>
 );
-  }
+
-}
+CoreLayout.propTypes = {
+  children: PropTypes.objectOf(PropTypes.object)
+};
 
 export default CoreLayout;

app/src/containers/NavBarContainer.js

@@ -1,4 +1,5 @@
-import React, { Component } from 'react';
+import React from 'react';
+import PropTypes from 'prop-types';
 import { bindActionCreators } from 'redux';
 import { connect } from 'react-redux';
 import { push } from 'connected-react-router';
@@ -6,11 +7,9 @@ import { Image, Menu } from 'semantic-ui-react';
 
 import logo from '../assets/images/logo.png';
 
-class NavBarContainer extends Component {
+const NavBarContainer = ({ hasSignedUp, navigateTo, navBarTitle }) => (
-  render() {
-    return (
   <Menu fixed="top" inverted>
-        <Menu.Item header onClick={() => { this.props.navigateTo('/'); }}>
+    <Menu.Item header onClick={() => { navigateTo('/'); }}>
       <Image
         size="mini"
         src={logo}
@@ -20,12 +19,12 @@ class NavBarContainer extends Component {
       />
         Apella
     </Menu.Item>
-        <Menu.Item onClick={() => { this.props.navigateTo('/home'); }}>
+    <Menu.Item onClick={() => { navigateTo('/home'); }}>
         Home
     </Menu.Item>
-        {this.props.hasSignedUp
+    {hasSignedUp
       ? (
-            <Menu.Item onClick={() => { this.props.navigateTo('/profile'); }}>
+        <Menu.Item onClick={() => { navigateTo('/profile'); }}>
             Profile
         </Menu.Item>
       )
@@ -36,20 +35,24 @@ class NavBarContainer extends Component {
             backgroundColor: '#00b5ad'
           }}
         >
-              <Menu.Item onClick={() => { this.props.navigateTo('/signup'); }}>
+          <Menu.Item onClick={() => { navigateTo('/signup'); }}>
               SignUp
           </Menu.Item>
         </Menu.Menu>
       )
       }
     <div className="navBarText">
-          {this.props.navBarTitle !== ''
+      {navBarTitle !== ''
-            && <span>{this.props.navBarTitle}</span>}
+        && <span>{navBarTitle}</span>}
     </div>
   </Menu>
 );
-  }
+
-}
+NavBarContainer.propTypes = {
+  hasSignedUp: PropTypes.bool.isRequired,
+  navigateTo: PropTypes.func.isRequired,
+  navBarTitle: PropTypes.string.isRequired
+};
 
 const mapDispatchToProps = dispatch => bindActionCreators({
   navigateTo: location => push(location)

app/src/containers/ProfileContainer.js

@@ -1,11 +1,11 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 import { bindActionCreators } from 'redux';
 import { push } from 'connected-react-router';
 import { connect } from 'react-redux';
 import { Tab } from 'semantic-ui-react';
 import { drizzle } from '../index';
 
-
 import ProfileInformation from '../components/ProfileInformation';
 import TopicList from '../components/TopicList';
 import PostList from '../components/PostList';
@@ -29,12 +29,14 @@ class ProfileContainer extends Component {
   constructor(props) {
     super(props);
 
+    const { match, user } = this.props;
+
     this.getBlockchainData = this.getBlockchainData.bind(this);
 
     this.dataKey = [];
-    const address = this.props.match.params.address
+    const address = match.params.address
-      ? this.props.match.params.address
+      ? match.params.address
-      : this.props.user.address;
+      : user.address;
 
     this.state = {
       pageStatus: 'initialized',
@@ -45,12 +47,28 @@ class ProfileContainer extends Component {
     };
   }
 
+  componentDidMount() {
+    this.getBlockchainData();
+  }
+
+  componentDidUpdate() {
+    this.getBlockchainData();
+  }
+
+  componentWillUnmount() {
+    const { setNavBarTitle } = this.props;
+    setNavBarTitle('');
+  }
+
   getBlockchainData() {
-    if (this.state.pageStatus === 'initialized'
+    const { userAddress, pageStatus, username, topicIDs, postIDs } = this.state;
-        && this.props.drizzleStatus.initialized) {
+    const { drizzleStatus, setNavBarTitle, contracts } = this.props;
+
+    if (pageStatus === 'initialized'
+        && drizzleStatus.initialized) {
       callsInfo.forEach((call, index) => {
         this.dataKey[index] = drizzle.contracts[call.contract].methods[call.method].cacheCall(
-          this.state.userAddress,
+          userAddress,
         );
       });
       this.setState({
@@ -58,42 +76,42 @@ class ProfileContainer extends Component {
       });
     }
 
-    if (this.state.pageStatus === 'loading') {
+    if (pageStatus === 'loading') {
-      let pageStatus = 'loaded';
+      let pageStatusUpdate = 'loaded';
       callsInfo.forEach((call, index) => {
-        if (!this.props.contracts[call.contract][call.method][this.dataKey[index]]) {
+        if (!contracts[call.contract][call.method][this.dataKey[index]]) {
-          pageStatus = 'loading';
+          pageStatusUpdate = 'loading';
         }
       });
 
-      if (pageStatus === 'loaded') {
+      if (pageStatusUpdate === 'loaded') {
         this.setState({
-          pageStatus
+          pageStatus: pageStatusUpdate
         });
       }
     }
 
-    if (this.state.pageStatus === 'loaded') {
+    if (pageStatus === 'loaded') {
-      if (this.state.username === '') {
+      if (username === '') {
-        const transaction = this.props.contracts[callsInfo[0].contract][callsInfo[0].method][this.dataKey[0]];
+        const transaction = contracts[callsInfo[0].contract][callsInfo[0].method][this.dataKey[0]];
         if (transaction) {
           const username = transaction.value;
-          this.props.setNavBarTitle(username);
+          setNavBarTitle(username);
           this.setState({
             username
           });
         }
       }
-      if (this.state.topicIDs === null) {
+      if (topicIDs === null) {
-        const transaction = this.props.contracts[callsInfo[1].contract][callsInfo[1].method][this.dataKey[1]];
+        const transaction = contracts[callsInfo[1].contract][callsInfo[1].method][this.dataKey[1]];
         if (transaction) {
           this.setState({
             topicIDs: transaction.value
           });
         }
       }
-      if (this.state.postIDs === null) {
+      if (postIDs === null) {
-        const transaction = this.props.contracts[callsInfo[2].contract][callsInfo[2].method][this.dataKey[2]];
+        const transaction = contracts[callsInfo[2].contract][callsInfo[2].method][this.dataKey[2]];
         if (transaction) {
           this.setState({
             postIDs: transaction.value
@@ -106,33 +124,36 @@ class ProfileContainer extends Component {
   }
 
   render() {
-    if (!this.props.user.hasSignedUp) {
+    const { userAddress, username, topicIDs, postIDs } = this.state;
-      this.props.navigateTo('/signup');
+    const { navigateTo, user } = this.props;
+
+    if (!user.hasSignedUp) {
+      navigateTo('/signup');
       return (null);
     }
 
     const infoTab = (
       <ProfileInformation
-        address={this.state.userAddress}
+        address={userAddress}
-        username={this.state.username}
+        username={username}
-        numberOfTopics={this.state.topicIDs && this.state.topicIDs.length}
+        numberOfTopics={topicIDs && topicIDs.length}
-        numberOfPosts={this.state.postIDs && this.state.postIDs.length}
+        numberOfPosts={postIDs && postIDs.length}
-        self={this.state.userAddress === this.props.user.address}
+        self={userAddress === user.address}
         key="profileInfo"
       />
     );
     const topicsTab = (
       <div className="profile-tab">
-        {this.state.topicIDs
+        {topicIDs
-          ? <TopicList topicIDs={this.state.topicIDs} />
+          ? <TopicList topicIDs={topicIDs} />
           : <LoadingSpinner />
           }
       </div>
     );
     const postsTab = (
       <div className="profile-tab">
-        {this.state.postIDs
+        {postIDs
-          ? <PostList postIDs={this.state.postIDs} recentToTheTop />
+          ? <PostList postIDs={postIDs} recentToTheTop />
           : <LoadingSpinner />
           }
       </div>
@@ -174,19 +195,16 @@ class ProfileContainer extends Component {
       </div>
     );
   }
-
-  componentDidMount() {
-    this.getBlockchainData();
-  }
-
-  componentDidUpdate() {
-    this.getBlockchainData();
 }
 
-  componentWillUnmount() {
+ProfileContainer.propTypes = {
-    this.props.setNavBarTitle('');
+  match: PropTypes.object.isRequired,
-  }
+  drizzleStatus: PropTypes.object.isRequired,
-}
+  contracts: PropTypes.array.isRequired,
+  navigateTo: PropTypes.func.isRequired,
+  user: PropTypes.object.isRequired,
+  setNavBarTitle: PropTypes.func.isRequired
+};
 
 const mapDispatchToProps = dispatch => bindActionCreators({
   navigateTo: location => push(location),

app/src/containers/SignUpContainer.js

@@ -1,4 +1,5 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 
 import { Header } from 'semantic-ui-react';
 import { connect } from 'react-redux';
@@ -6,12 +7,15 @@ import UsernameFormContainer from './UsernameFormContainer';
 
 class SignUpContainer extends Component {
   componentDidUpdate(prevProps) {
-    if (this.props.user.hasSignedUp && !prevProps.user.hasSignedUp) this.props.history.push('/');
+    const { user, history } = this.props;
+    if (user.hasSignedUp && !prevProps.user.hasSignedUp) history.push('/');
   }
 
   render() {
+    const { user } = this.props;
+
     return (
-      this.props.user.hasSignedUp
+      user.hasSignedUp
         ? (
           <div className="vertical-center-in-parent">
             <Header color="teal" textAlign="center" as="h2">
@@ -29,7 +33,7 @@ class SignUpContainer extends Component {
               <p className="no-margin">
                 <strong>Account address:</strong>
                 {' '}
-                {this.props.user.address}
+                {user.address}
               </p>
               <UsernameFormContainer />
             </div>
@@ -39,6 +43,11 @@ class SignUpContainer extends Component {
   }
 }
 
+SignUpContainer.propTypes = {
+  user: PropTypes.object.isRequired,
+  history: PropTypes.object.isRequired
+};
+
 const mapStateToProps = state => ({
   user: state.user
 });

app/src/containers/StartTopicContainer.js

@@ -1,4 +1,5 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 
 import { Button, Form, Icon, TextArea } from 'semantic-ui-react';
@@ -7,7 +8,7 @@ import NewTopicPreview from '../components/NewTopicPreview';
 import { createTopic } from '../redux/actions/transactionsActions';
 
 class StartTopicContainer extends Component {
-  constructor(props, context) {
+  constructor(props) {
     super(props);
 
     this.handleInputChange = this.handleInputChange.bind(this);
@@ -25,24 +26,27 @@ class StartTopicContainer extends Component {
   }
 
   async validateAndPost() {
-    if (this.state.topicSubjectInput === '' || this.state.topicMessageInput
+    const { topicSubjectInput, topicMessageInput } = this.state;
+    const { dispatch, history } = this.props;
+
+    if (topicSubjectInput === '' || topicMessageInput
         === '') {
       this.setState({
-        topicSubjectInputEmptySubmit: this.state.topicSubjectInput === '',
+        topicSubjectInputEmptySubmit: topicSubjectInput === '',
-        topicMessageInputEmptySubmit: this.state.topicMessageInput === ''
+        topicMessageInputEmptySubmit: topicMessageInput === ''
       });
       return;
     }
 
-    this.props.dispatch(
+    dispatch(
       createTopic(
         {
-          topicSubject: this.state.topicSubjectInput,
+          topicSubject: topicSubjectInput,
-          topicMessage: this.state.topicMessageInput
+          topicMessage: topicMessageInput
         },
       ),
     );
-    this.props.history.push('/home');
+    history.push('/home');
   }
 
   handleInputChange(event) {
@@ -52,7 +56,7 @@ class StartTopicContainer extends Component {
   }
 
   handlePreviewToggle() {
-    this.setState((prevState, props) => ({
+    this.setState((prevState) => ({
       previewEnabled: !prevState.previewEnabled,
       previewDate: this.getDate()
     }));
@@ -69,32 +73,38 @@ class StartTopicContainer extends Component {
   }
 
   render() {
-    if (!this.props.user.hasSignedUp) {
+    const {
-      this.props.history.push('/signup');
+      previewDate, previewEnabled, topicSubjectInputEmptySubmit, topicSubjectInput,
+      topicMessageInputEmptySubmit, topicMessageInput
+    } = this.state;
+    const { user, history } = this.props;
+
+    if (!user.hasSignedUp) {
+      history.push('/signup');
       return (null);
     }
 
-    const previewEditText = this.state.previewEnabled ? 'Edit' : 'Preview';
+    const previewEditText = previewEnabled ? 'Edit' : 'Preview';
     return (
       <div>
-        {this.state.previewEnabled
+        {previewEnabled
           && (
           <NewTopicPreview
-            date={this.state.previewDate}
+            date={previewDate}
-            subject={this.state.topicSubjectInput}
+            subject={topicSubjectInput}
-            content={this.state.topicMessageInput}
+            content={topicMessageInput}
           />
           )
           }
         <Form>
-          {!this.state.previewEnabled
+          {!previewEnabled
             && [
               <Form.Field key="topicSubjectInput">
                 <Form.Input
                   name="topicSubjectInput"
-                  error={this.state.topicSubjectInputEmptySubmit}
+                  error={topicSubjectInputEmptySubmit}
                   type="text"
-                  value={this.state.topicSubjectInput}
+                  value={topicSubjectInput}
                   placeholder="Subject"
                   id="topicSubjectInput"
                   onChange={this.handleInputChange}
@@ -103,10 +113,10 @@ class StartTopicContainer extends Component {
               <TextArea
                 key="topicMessageInput"
                 name="topicMessageInput"
-                className={this.state.topicMessageInputEmptySubmit
+                className={topicMessageInputEmptySubmit
                   ? 'form-textarea-required'
                   : ''}
-                value={this.state.topicMessageInput}
+                value={topicMessageInput}
                 placeholder="Post"
                 id="topicMessageInput"
                 rows={5}
@@ -143,6 +153,12 @@ class StartTopicContainer extends Component {
   }
 }
 
+StartTopicContainer.propTypes = {
+  dispatch: PropTypes.func.isRequired,
+  history: PropTypes.object.isRequired,
+  user: PropTypes.object.isRequired
+};
+
 const mapStateToProps = state => ({
   orbitDB: state.orbitDB,
   user: state.user

app/src/containers/TopicContainer.js

@@ -1,4 +1,5 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 import { bindActionCreators } from 'redux';
 import { push } from 'connected-react-router';
 import { connect } from 'react-redux';
@@ -17,9 +18,11 @@ class TopicContainer extends Component {
   constructor(props) {
     super(props);
 
+    const { match, navigateTo } = props;
+
     // Topic ID should be a positive integer
-    if (!/^[0-9]+$/.test(this.props.match.params.topicId)) {
+    if (!/^[0-9]+$/.test(match.params.topicId)) {
-      this.props.navigateTo('/404');
+      navigateTo('/404');
     }
 
     this.getBlockchainData = this.getBlockchainData.bind(this);
@@ -29,46 +32,62 @@ class TopicContainer extends Component {
 
     this.state = {
       pageStatus: 'initialized',
-      topicID: parseInt(this.props.match.params.topicId),
+      topicID: parseInt(match.params.topicId),
       topicSubject: null,
-      postFocus: this.props.match.params.postId
+      postFocus: match.params.postId
-      && /^[0-9]+$/.test(this.props.match.params.postId)
+      && /^[0-9]+$/.test(match.params.postId)
-        ? this.props.match.params.postId
+        ? match.params.postId
         : null,
       fetchTopicSubjectStatus: 'pending',
       posting: false
     };
   }
 
+  componentDidMount() {
+    this.getBlockchainData();
+  }
+
+  componentDidUpdate() {
+    this.getBlockchainData();
+  }
+
+  componentWillUnmount() {
+    const { setNavBarTitle } = this.props;
+    setNavBarTitle('');
+  }
+
   getBlockchainData() {
-    if (this.state.pageStatus === 'initialized'
+    const { pageStatus, topicID, fetchTopicSubjectStatus } = this.state;
-        && this.props.drizzleStatus.initialized) {
+    const { drizzleStatus, orbitDB, contracts } = this.props;
+
+    if (pageStatus === 'initialized'
+        && drizzleStatus.initialized) {
       this.dataKey = drizzle.contracts[contract].methods[getTopicMethod].cacheCall(
-        this.state.topicID,
+        topicID,
       );
       this.setState({
         pageStatus: 'loading'
       });
     }
-    if (this.state.pageStatus === 'loading'
+    if (pageStatus === 'loading'
-        && this.props.contracts[contract][getTopicMethod][this.dataKey]) {
+        && contracts[contract][getTopicMethod][this.dataKey]) {
       this.setState({
         pageStatus: 'loaded'
       });
-      if (this.props.orbitDB.orbitdb !== null) {
+      if (orbitDB.orbitdb !== null) {
         this.fetchTopicSubject(
-          this.props.contracts[contract][getTopicMethod][this.dataKey].value[0],
+          contracts[contract][getTopicMethod][this.dataKey].value[0],
         );
         this.setState({
           fetchTopicSubjectStatus: 'fetching'
         });
       }
     }
-    if (this.state.pageStatus === 'loaded'
+    if (pageStatus === 'loaded'
-        && this.state.fetchTopicSubjectStatus === 'pending'
+        && fetchTopicSubjectStatus === 'pending'
-        && this.props.orbitDB.orbitdb !== null) {
+        && orbitDB.orbitdb !== null) {
       this.fetchTopicSubject(
-        this.props.contracts[contract][getTopicMethod][this.dataKey].value[0],
+        contracts[contract][getTopicMethod][this.dataKey].value[0],
       );
       this.setState({
         fetchTopicSubjectStatus: 'fetching'
@@ -77,27 +96,30 @@ class TopicContainer extends Component {
   }
 
   async fetchTopicSubject(orbitDBAddress) {
+    const { topicID } = this.state;
+    const { contracts, user, orbitDB, setNavBarTitle } = this.props;
+
     let orbitData;
-    if (this.props.contracts[contract][getTopicMethod][this.dataKey].value[1]
+    if (contracts[contract][getTopicMethod][this.dataKey].value[1]
-        === this.props.user.address) {
+        === user.address) {
-      orbitData = this.props.orbitDB.topicsDB.get(this.state.topicID);
+      orbitData = orbitDB.topicsDB.get(topicID);
     } else {
       const fullAddress = `/orbitdb/${orbitDBAddress}/topics`;
-      const store = await this.props.orbitDB.orbitdb.keyvalue(fullAddress);
+      const store = await orbitDB.orbitdb.keyvalue(fullAddress);
       await store.load();
 
-      const localOrbitData = store.get(this.state.topicID);
+      const localOrbitData = store.get(topicID);
       if (localOrbitData) {
         orbitData = localOrbitData;
       } else {
         // Wait until we have received something from the network
         store.events.on('replicated', () => {
-          orbitData = store.get(this.state.topicID);
+          orbitData = store.get(topicID);
         });
       }
     }
 
-    this.props.setNavBarTitle(orbitData.subject);
+    setNavBarTitle(orbitData.subject);
     this.setState({
       topicSubject: orbitData.subject,
       fetchTopicSubjectStatus: 'fetched'
@@ -120,30 +142,33 @@ class TopicContainer extends Component {
   }
 
   render() {
+    const { pageStatus, postFocus, topicID, topicSubject, posting } = this.state;
+    const { contracts, user } = this.props;
+
     let topicContents;
-    if (this.state.pageStatus === 'loaded') {
+    if (pageStatus === 'loaded') {
       topicContents = (
         (
           <div>
             <PostList
-              postIDs={this.props.contracts[contract][getTopicMethod][this.dataKey].value[4]}
+              postIDs={contracts[contract][getTopicMethod][this.dataKey].value[4]}
-              focusOnPost={this.state.postFocus
+              focusOnPost={postFocus
-                ? this.state.postFocus
+                ? postFocus
                 : null}
             />
-            {this.state.posting
+            {posting
             && (
             <NewPost
-              topicID={this.state.topicID}
+              topicID={topicID}
-              subject={this.state.topicSubject}
+              subject={topicSubject}
-              postIndex={this.props.contracts[contract][getTopicMethod][this.dataKey].value[4].length}
+              postIndex={contracts[contract][getTopicMethod][this.dataKey].value[4].length}
               onCancelClick={() => { this.togglePostingState(); }}
               onPostCreated={() => { this.postCreated(); }}
             />
             )
             }
             <div className="posts-list-spacer" />
-            {this.props.user.hasSignedUp && !this.state.posting
+            {user.hasSignedUp && !posting
             && <FloatingButton onClick={this.togglePostingState} />
             }
           </div>
@@ -154,25 +179,23 @@ class TopicContainer extends Component {
     return (
       <div className="fill">
         {topicContents}
-        {!this.state.posting
+        {!posting
           && <div className="bottom-overlay-pad" />
           }
       </div>
     );
   }
-
-  componentDidMount() {
-    this.getBlockchainData();
 }
 
-  componentDidUpdate() {
+TopicContainer.propTypes = {
-    this.getBlockchainData();
+  drizzleStatus: PropTypes.object.isRequired,
-  }
+  orbitDB: PropTypes.object.isRequired,
-
+  setNavBarTitle: PropTypes.func.isRequired,
-  componentWillUnmount() {
+  contracts: PropTypes.array.isRequired,
-    this.props.setNavBarTitle('');
+  user: PropTypes.object.isRequired,
-  }
+  match: PropTypes.object.isRequired,
-}
+  navigateTo: PropTypes.func.isRequired
+};
 
 const mapDispatchToProps = dispatch => bindActionCreators({
   navigateTo: location => push(location),

app/src/containers/TransactionsMonitorContainer.js

@@ -1,11 +1,12 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 import { withRouter } from 'react-router-dom';
 
 import { Message } from 'semantic-ui-react';
 
 class RightSideBar extends Component {
-  constructor(props, context) {
+  constructor(props) {
     super(props);
 
     this.handleMessageClick = this.handleMessageClick.bind(this);
@@ -17,33 +18,35 @@ class RightSideBar extends Component {
   }
 
   handleMessageClick(index) {
-    const transactionHash = this.props.transactionStack[index];
+    const { transactionStack, history, transactions } = this.props;
-    if (this.props.transactions[transactionHash]) {
+
-      if (this.props.transactions[transactionHash].status === 'error') {
+    const transactionHash = transactionStack[index];
+    if (transactions[transactionHash]) {
+      if (transactions[transactionHash].status === 'error') {
         this.handleMessageDismiss(null, index);
-      } else if (this.props.transactions[transactionHash].receipt
+      } else if (transactions[transactionHash].receipt
-            && this.props.transactions[transactionHash].receipt.events) {
+            && transactions[transactionHash].receipt.events) {
         switch (Object.keys(
-          this.props.transactions[transactionHash].receipt.events,
+          transactions[transactionHash].receipt.events,
         )[0]) {
           case 'UserSignedUp':
-            this.props.history.push('/profile');
+            history.push('/profile');
             this.handleMessageDismiss(null, index);
             break;
           case 'UsernameUpdated':
-            this.props.history.push('/profile');
+            history.push('/profile');
             this.handleMessageDismiss(null, index);
             break;
           case 'TopicCreated':
-            this.props.history.push(`/topic/${
+            history.push(`/topic/${
-              this.props.transactions[transactionHash].receipt.events.TopicCreated.returnValues.topicID}`);
+              transactions[transactionHash].receipt.events.TopicCreated.returnValues.topicID}`);
             this.handleMessageDismiss(null, index);
             break;
           case 'PostCreated':
-            this.props.history.push(`/topic/${
+            history.push(`/topic/${
-              this.props.transactions[transactionHash].receipt.events.PostCreated.returnValues.topicID
+              transactions[transactionHash].receipt.events.PostCreated.returnValues.topicID
             }/${
-              this.props.transactions[transactionHash].receipt.events.PostCreated.returnValues.postID}`);
+              transactions[transactionHash].receipt.events.PostCreated.returnValues.postID}`);
             this.handleMessageDismiss(null, index);
             break;
           default:
@@ -59,7 +62,9 @@ class RightSideBar extends Component {
       event.stopPropagation();
     }
 
-    const isTransactionMessageDismissedShallowCopy = this.state.isTransactionMessageDismissed.slice();
+    const { isTransactionMessageDismissed } = this.state;
+
+    const isTransactionMessageDismissedShallowCopy = isTransactionMessageDismissed.slice();
     isTransactionMessageDismissedShallowCopy[messageIndex] = true;
     this.setState({
       isTransactionMessageDismissed: isTransactionMessageDismissedShallowCopy
@@ -67,13 +72,16 @@ class RightSideBar extends Component {
   }
 
   render() {
-    if (this.props.transactionStack.length === 0) {
+    const { isTransactionMessageDismissed } = this.state;
+    const { transactionStack, transactions } = this.props;
+
+    if (transactionStack.length === 0) {
       return null;
     }
 
-    const transactionMessages = this.props.transactionStack.map(
+    const transactionMessages = transactionStack.map(
       (transaction, index) => {
-        if (this.state.isTransactionMessageDismissed[index]) {
+        if (isTransactionMessageDismissed[index]) {
           return null;
         }
 
@@ -82,20 +90,20 @@ class RightSideBar extends Component {
         message.push(
           'New transaction has been queued and is waiting your confirmation.',
         );
-        if (this.props.transactions[transaction]) {
+        if (transactions[transaction]) {
           message.push(<br key="confirmed" />);
           message.push('- transaction confirmed');
         }
-        if (this.props.transactions[transaction]
+        if (transactions[transaction]
-              && this.props.transactions[transaction].status === 'success') {
+              && transactions[transaction].status === 'success') {
           /*      Transaction completed successfully      */
           message.push(<br key="mined" />);
           message.push('- transaction mined');
           color = 'green';
           message.push(<br key="success" />);
           message.push('- transaction completed successfully');
-        } else if (this.props.transactions[transaction]
+        } else if (transactions[transaction]
-              && this.props.transactions[transaction].status === 'error') {
+              && transactions[transaction].status === 'error') {
           /*      Transaction failed to complete      */
           message.push(<br key="mined" />);
           message.push('- transaction mined');
@@ -127,6 +135,12 @@ class RightSideBar extends Component {
   }
 }
 
+RightSideBar.propTypes = {
+  transactionStack: PropTypes.array.isRequired,
+  history: PropTypes.object.isRequired,
+  transactions: PropTypes.PropTypes.objectOf(PropTypes.object).isRequired
+};
+
 const mapStateToProps = state => ({
   transactions: state.transactions,
   transactionStack: state.transactionStack

app/src/containers/UsernameFormContainer.js

@@ -1,4 +1,5 @@
 import React, { Component } from 'react';
+import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 
 import { Button, Dimmer, Form, Header, Loader, Message } from 'semantic-ui-react';
@@ -48,16 +49,18 @@ class UsernameFormContainer extends Component {
   }
 
   handleSubmit() {
-    if (this.state.usernameInput === '') {
+    const { usernameInput, error } = this.state;
+
+    if (usernameInput === '') {
       this.setState({
         error: true,
         errorHeader: 'Data Incomplete',
         errorMessage: 'You need to provide a username'
       });
-    } else if (!this.state.error) {
+    } else if (!error) {
       // Makes sure current input username has been checked for availability
       if (this.checkedUsernames.some(
-        e => e.usernameChecked === this.state.usernameInput,
+        e => e.usernameChecked === usernameInput,
       )) {
         this.completeAction();
       }
@@ -65,8 +68,11 @@ class UsernameFormContainer extends Component {
   }
 
   async completeAction() {
-    if (this.props.user.hasSignedUp) {
+    const { usernameInput } = this.state;
-      this.props.dispatch(updateUsername(...[this.state.usernameInput], null));
+    const { user, dispatch, account } = this.props;
+
+    if (user.hasSignedUp) {
+      dispatch(updateUsername(...[usernameInput], null));
     } else {
       this.setState({
         signingUp: true
@@ -74,7 +80,7 @@ class UsernameFormContainer extends Component {
       const orbitdbInfo = await createDatabases();
       this.stackId = drizzle.contracts[contract].methods[signUpMethod].cacheSend(
         ...[
-          this.state.usernameInput,
+          usernameInput,
           orbitdbInfo.identityId,
           orbitdbInfo.identityPublicKey,
           orbitdbInfo.identityPrivateKey,
@@ -84,7 +90,7 @@ class UsernameFormContainer extends Component {
           orbitdbInfo.topicsDB,
           orbitdbInfo.postsDB
         ], {
-          from: this.props.account
+          from: account
         },
       );
     }
@@ -94,18 +100,21 @@ class UsernameFormContainer extends Component {
   }
 
   componentDidUpdate() {
-    if (this.state.signingUp) {
+    const { signingUp, usernameInput, error } = this.state;
-      const txHash = this.props.transactionStack[this.stackId];
+    const { transactionStack, transactions, contracts } = this.props;
+
+    if (signingUp) {
+      const txHash = transactionStack[this.stackId];
       if (txHash
-          && this.props.transactions[txHash]
+          && transactions[txHash]
-          && this.props.transactions[txHash].status === 'error') {
+          && transactions[txHash].status === 'error') {
         this.setState({
           signingUp: false
         });
       }
     } else {
       const temp = Object.values(
-        this.props.contracts[contract][checkUsernameTakenMethod],
+        contracts[contract][checkUsernameTakenMethod],
       );
       this.checkedUsernames = temp.map(checked => ({
         usernameChecked: checked.args[0],
@@ -114,8 +123,8 @@ class UsernameFormContainer extends Component {
 
       if (this.checkedUsernames.length > 0) {
         this.checkedUsernames.forEach((checked) => {
-          if (checked.usernameChecked === this.state.usernameInput
+          if (checked.usernameChecked === usernameInput
-              && checked.isTaken && !this.state.error) {
+              && checked.isTaken && !error) {
             this.setState({
               error: true,
               errorHeader: 'Data disapproved',
@@ -128,14 +137,15 @@ class UsernameFormContainer extends Component {
   }
 
   render() {
-    const { hasSignedUp } = this.props.user;
+    const { error, usernameInput, errorHeader, errorMessage, signingUp } = this.state;
+    const { user } = this.props;
 
-    if (hasSignedUp !== null) {
+    if (user.hasSignedUp !== null) {
-      const buttonText = hasSignedUp ? 'Update' : 'Sign Up';
+      const buttonText = user.hasSignedUp ? 'Update' : 'Sign Up';
-      const placeholderText = hasSignedUp
+      const placeholderText = user.hasSignedUp
-        ? this.props.user.username
+        ? user.username
         : 'Username';
-      const withError = this.state.error && {
+      const withError = error && {
         error: true
       };
 
@@ -158,18 +168,18 @@ class UsernameFormContainer extends Component {
               <Form.Input
                 placeholder={placeholderText}
                 name="usernameInput"
-                value={this.state.usernameInput}
+                value={usernameInput}
                 onChange={this.handleInputChange}
               />
             </Form.Field>
             <Message
               error
-              header={this.state.errorHeader}
+              header={errorHeader}
-              content={this.state.errorMessage}
+              content={errorMessage}
             />
             <Button type="submit">{buttonText}</Button>
           </Form>
-          <Dimmer active={this.state.signingUp} page>
+          <Dimmer active={signingUp} page>
             <Header as="h2" inverted>
               <Loader size="large">
 Magic elves are processing your noble
@@ -185,6 +195,16 @@ Magic elves are processing your noble
   }
 }
 
+UsernameFormContainer.propTypes = {
+  dispatch: PropTypes.func.isRequired,
+  account: PropTypes.string.isRequired,
+  transactionStack: PropTypes.array.isRequired,
+  transactions: PropTypes.array.isRequired,
+  contracts: PropTypes.array.isRequired,
+  hasSignedUp: PropTypes.object.isRequired,
+  user: PropTypes.object.isRequired
+};
+
 const mapStateToProps = state => ({
   account: state.accounts[0],
   contracts: state.contracts,

app/src/redux/sagas/transactionsSaga.js

@@ -7,7 +7,8 @@ import { DRIZZLE_UTILS_SAGA_INITIALIZED } from '../actions/drizzleUtilsActions';
 const transactionsHistory = Object.create(null);
 
 function* initTransaction(action) {
-  const dataKey = drizzle.contracts[action.transactionDescriptor.contract].methods[action.transactionDescriptor.method].cacheSend(
+  const dataKey = drizzle.contracts[action.transactionDescriptor.contract]
+    .methods[action.transactionDescriptor.method].cacheSend(
     ...(action.transactionDescriptor.params),
   );
 

package.json

@@ -15,7 +15,7 @@
     "openzeppelin-solidity": "^2.1.2"
   },
   "devDependencies": {
-    "eslint": "5.15.1",
+    "eslint": "5.12.0",
     "eslint-config-airbnb": "17.1.0",
     "eslint-plugin-import": "2.16.0",
     "eslint-plugin-jsx-a11y": "6.2.1",