chore: fix typos

Bumps [follow-redirects](https://github.com/follow-redirects/follow-redirects) from 1.14.7 to 1.14.8.
- [Release notes](https://github.com/follow-redirects/follow-redirects/releases)
- [Commits](https://github.com/follow-redirects/follow-redirects/compare/v1.14.7...v1.14.8)

---
updated-dependencies:
- dependency-name: follow-redirects
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/ISSUE_TEMPLATE/FEATURE.md

@@ -0,0 +1,19 @@
+---
+name: Feature Request
+about: Use this template for requesting new features
+title: "[FEATURE NAME]"
+labels: enhancement
+assignees: 
+---
+
+## Expected Behavior
+
+Please describe the behavior you are expecting
+
+## Current Behavior
+
+What is the current behavior?
+
+## Sample Code
+
+If applicable, provide a sample code snippet that demonstrates the gist of the feature you're proposing. This can be either from a usage standpoint, or an implementation standpoint.

.github/ISSUE_TEMPLATE/ISSUE.md

@@ -0,0 +1,38 @@
+---
+name: Issue Report
+about: Use this template to report a problem
+title: "[VERSION] [PROBLEM SUMMARY]"
+labels: bug
+assignees: 
+---
+
+## Expected Behavior
+
+Please describe the behavior you are expecting
+
+## Current Behavior
+
+What is the current behavior?
+
+## Failure Information (for bugs)
+
+Please help provide information about the failure if this is a bug. If it is not a bug, please remove the rest of this template.
+
+### Steps to Reproduce
+
+Please provide detailed steps for reproducing the issue.
+
+1. step 1
+2. step 2
+3. you get it...
+
+### Failure Logs
+
+Please include any relevant log snippets or files here.
+
+## Checklist
+
+- [ ] I am running the latest version
+- [ ] I checked the documentation and found no answer
+- [ ] I checked to make sure that this issue has not already been filed
+- [ ] I have provided sufficient information

.github/ISSUE_TEMPLATE/QUESTION.md

@@ -0,0 +1,15 @@
+---
+name: Question
+about: Use this template to ask a question about the project
+title: "[QUESTION SUMMARY]"
+labels: question
+assignees: 
+---
+
+## Question
+
+State your question
+
+## Sample Code
+
+Please include relevant code snippets or files that provide context for your question.

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1 @@
+blank_issues_enabled: false

.github/pull_request_template.md

@@ -0,0 +1,27 @@
+# Pull Request Template
+
+## Description
+
+Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.
+
+Fixes # (issue)
+
+## Type of change
+
+Please delete options that are not relevant.
+
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] This change requires a documentation update
+
+## Checklist:
+
+- [ ] My code follows the style guidelines of this project
+- [ ] I have performed a self-review of my own code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation
+- [ ] My changes generate no new warnings
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] New and existing unit tests pass locally with my changes
+- [ ] I have checked my code and corrected any misspellings

.github/workflows/node.js.yml

@@ -1,6 +1,5 @@
 # This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
 # For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
-# TODO: Make actual tests instead of just running the examples file
 
 name: Build
 
@@ -17,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [ 12.x, 14.x, 15.x]
+        node-version: [ 14.x, 15.x, 16.x ]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:
@@ -27,4 +26,4 @@ jobs:
       with:
         node-version: ${{ matrix.node-version }}
     - run: npm install
-    - run: node ./examples
+    - run: npm test

LICENSE

@@ -18,4 +18,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+SOFTWARE.

examples/index.js

@@ -1,81 +1,92 @@
-'use strict';
-
-const fs = require('fs');
-const Innertube = require('..');
-
-async function start() {
-  const youtube = await new Innertube();
-
-  // Searching, getting details about videos & making interactions:
-  const search = await youtube.search('Looking for life on Mars - documentary');
-  console.info('Search results:', search);
-  
-  if (search.videos.length === 0) 
-    return console.error('Could not find any video about that on YouTube.');
-  
-  const video = await youtube.getDetails(search.videos[0].id).catch((error) => error);
-  console.info('Video details:', video);
- 
-  if (video instanceof Error) 
-    return console.error('Could not get details for ' + search.videos[0].title);
-  
-  if (youtube.logged_in) {
-    const myNotifications = await youtube.getNotifications();
-    console.info('My notifications:', myNotifications);
-
-    const like = await video.like();
-    if (like.success) {
-      console.info('Video marked as liked!');
-    }
-
-    const dislike = await video.dislike();
-    if (dislike.success) {
-      console.info('Video marked as disliked!');
-    }
-
-    const removeDislikeOrLike = await video.removeLike();
-    if (removeDislikeOrLike.success) {
-      console.info('Removed the dislike/like!')
-    }
-
-    const myComment = await video.comment('Haha, nice!');
-    if (myComment.success) {
-      console.info('Comment successfully posted!')
-    }
-
-    const subscribe = await video.subscribe();
-    if (subscribe.success) {
-      console.info('Just subscribed to', video.metadata.channel_name + '!');
-    }
-
-    const unsubscribe = await video.unsubscribe();
-    if (unsubscribe.success) {
-      console.info('Just unsubscribed from', video.metadata.channel_name + ' :(');
-    }
-  }
-
-  // Downloading videos:
-  const stream = youtube.download(search.videos[0].id, {
-    format: 'mp4', // Optional, ignored when type is set to audio and defaults to mp4, and I recommend to leave it as it is
-    quality: '360p', // if a video doesn't have a specific quality it'll fall back to 360p, this is ignored when type is set to audio
-    type: 'videoandaudio' // can be “video”, “audio” and “videoandaudio”
-  });
-
-  stream.pipe(fs.createWriteStream(`./${search.videos[0].id}.mp4`));
-
-  stream.on('start', () => {
-    console.info('[DOWNLOADER]', 'Starting download now!');
-  });
-
-  stream.on('info', (info) => {
-    console.info('[DOWNLOADER]', `Downloading ${info.video_details.title} by ${info.video_details.metadata.channel_name}`);
-  });
-
-  stream.on('end', () => {
-    console.info('[DOWNLOADER]', 'Done!');
-  });
-
-  stream.on('error', (err) => console.error('[ERROR]', err));
-}
-
+'use strict';
+
+const fs = require('fs');
+const Innertube = require('..');
+const creds_path = './yt_oauth_creds.json';
+const creds = fs.existsSync(creds_path) && JSON.parse(fs.readFileSync(creds_path).toString()) || {};
+
+async function start() {
+  const youtube = await new Innertube();
+  
+  youtube.ev.on('auth', (data) => {
+    if (data.status === 'AUTHORIZATION_PENDING') {
+      console.info(`Hello!\nOn your phone or computer, go to ${data.verification_url} and enter the code ${data.code}`);
+    } else if (data.status === 'SUCCESS') {
+      fs.writeFileSync(creds_path, JSON.stringify(data.credentials));
+      console.info('Successfully signed-in, enjoy!');
+    }
+  });
+  
+  youtube.ev.on('update-credentials', (data) => {
+    fs.writeFileSync(creds_path, JSON.stringify(data.credentials));
+    console.info('Credentials updated!', data);
+  });
+
+  await youtube.signIn(creds);
+
+  const search = await youtube.search('Looking for life on Mars - documentary');
+  console.info('Search results:', search);
+
+  const video = await youtube.getDetails(search.videos[0].id);
+  console.info('Video details:', video);
+
+  if (youtube.logged_in) {
+    const myNotifications = await youtube.getNotifications();
+    console.info('My notifications:', myNotifications);
+
+    const like = await video.like();
+    if (like.success) {
+      console.info('Video marked as liked!');
+    }
+
+    const dislike = await video.dislike();
+    if (dislike.success) {
+      console.info('Video marked as disliked!');
+    }
+
+    const removeDislikeOrLike = await video.removeLike();
+    if (removeDislikeOrLike.success) {
+      console.info('Removed the dislike/like!')
+    }
+
+    const myComment = await video.comment('Haha, nice!');
+    if (myComment.success) {
+      console.info('Comment successfully posted!')
+    }
+
+    const subscribe = await video.subscribe();
+    if (subscribe.success) {
+      console.info('Just subscribed to', video.metadata.channel_name + '!');
+    }
+
+    const unsubscribe = await video.unsubscribe();
+    if (unsubscribe.success) {
+      console.info('Just unsubscribed from', video.metadata.channel_name + ' :(');
+    }
+  }
+
+  // Downloading videos:
+  const stream = youtube.download(search.videos[0].id, {
+    format: 'mp4', // Optional, ignored when type is set to audio and defaults to mp4, and I recommend to leave it as it is
+    quality: '360p', // if a video doesn't have a specific quality it'll fall back to 360p, this is ignored when type is set to audio
+    type: 'videoandaudio' // can be “video”, “audio” and “videoandaudio”
+  });
+
+  stream.pipe(fs.createWriteStream(`./${search.videos[0].id}.mp4`));
+
+  stream.on('start', () => {
+    console.info('[DOWNLOADER]', 'Starting download now!');
+  });
+
+  stream.on('info', (info) => {
+    console.info('[DOWNLOADER]', `Downloading ${info.video_details.title} by ${info.video_details.metadata.channel_name}`);
+  });
+
+  stream.on('end', () => {
+    console.info('[DOWNLOADER]', 'Done!');
+  });
+
+  stream.on('error', (err) => console.error('[ERROR]', err));
+}
+
 start();

lib/Actions.js

@@ -1,168 +0,0 @@
-'use strict';
-
-const Axios = require('axios');
-const Utils = require('./Utils');
-const Constants = require('./Constants');
-const Uuid = require('uuid');
-
-async function engage(session, engagement_type, args = {}) {
-  if (!session.logged_in) throw new Error('You are not logged in');
-  let data = {};
-  switch (engagement_type) {
-    case 'like/like':
-    case 'like/dislike':
-    case 'like/removelike':
-      data = {
-        context: session.context,
-        target: {
-          videoId: args.video_id
-        }
-      };
-      break;
-    case 'subscription/subscribe':
-    case 'subscription/unsubscribe':
-      data = {
-        context: session.context,
-        channelIds: [args.channel_id]
-      };
-      break;
-    case 'comment/create_comment':
-      data = {
-        context: session.context,
-        commentText: args.text,
-        createCommentParams: Utils.generateCommentParams(args.video_id)
-      };
-      break;
-    default:
-  }
-
-  const response = await Axios.post(`${Constants.urls.YT_BASE_URL}/youtubei/v1/${engagement_type}${session.logged_in && session.cookie.length < 1 ? '' : `?key=${session.key}`}`, JSON.stringify(data), Constants.innertube_request_opts({ session, id: args.video_id, data })).catch((error) => error);
-  if (response instanceof Error) return { success: false, status_code: response.response.status, message: response.message };
-  return {
-    success: true,
-    status_code: response.status
-  };
-}
-
-async function browse(session, action_type) {
-  if (!session.logged_in) throw new Error('You are not logged in');
-  let data;
-  switch (action_type) {
-    case 'subscriptions_feed':
-      data = {
-        context: session.context,
-        browseId: 'FEsubscriptions'
-      };
-      break;
-    default:
-  }
-
-  const response = await Axios.post(`${Constants.urls.YT_BASE_URL}/youtubei/v1/browse${session.logged_in && session.cookie.length < 1 ? '' : `?key=${session.key}`}`, JSON.stringify(data), Constants.innertube_request_opts({ session })).catch((error) => error);
-  if (response instanceof Error) return { success: false, status_code: response.response.status, message: response.message };
-  return {
-    success: true,
-    status_code: response.status,
-    data: response.data
-  };
-}
-
-async function notifications(session, action_type, args = {}) {
-  if (!session.logged_in) throw new Error('You are not logged in');
-  let data;
-  switch (action_type) {
-    case 'modify_channel_preference':
-      let pref_types = { PERSONALIZED: 1, ALL: 2, NONE: 3 };
-      data = {
-        context: session.context,
-        params: Utils.encodeNotificationPref(args.channel_id, pref_types[args.pref.toUpperCase()])
-      };
-      break;
-    case 'get_notification_menu':
-      data = {
-        context: session.context,
-        notificationsMenuRequestType: 'NOTIFICATIONS_MENU_REQUEST_TYPE_INBOX'
-      };
-      break;
-    case 'get_unseen_count':
-      data = {
-        context: session.context
-      };
-      break;
-    default:
-  }
-
-  const response = await Axios.post(`${Constants.urls.YT_BASE_URL}/youtubei/v1/notification/${action_type}${session.logged_in && session.cookie.length < 1 ? '' : `?key=${session.key}`}`, JSON.stringify(data), Constants.innertube_request_opts({ session })).catch((error) => error);
-  if (response instanceof Error) return { success: false, status_code: response.response.status, message: response.message };
-  if (action_type === 'modify_channel_preference') return { success: true, status_code: response.status };
-  return {
-    success: true,
-    status_code: response.status,
-    data: response.data
-  };
-}
-
-async function livechat(session, action_type, args = {}) {
-  let data;
-  switch (action_type) {
-    case 'live_chat/send_message':
-      data = {
-        context: session.context,
-        params: Utils.generateMessageParams(args.channel_id, args.video_id),
-        clientMessageId: `INntLiB${Uuid.v4()}`,
-        richMessage: {
-          textSegments: [{ text: args.text }]
-        }
-      };
-      break;
-    case 'live_chat/get_item_context_menu':
-      data = {
-        context: session.context
-      };
-      break;
-    case 'live_chat/moderate':
-      data = {
-        context: session.context,
-        params: args.cmd_params
-      };
-      break;
-    default:
-  }
-
-  const response = await Axios.post(`${Constants.urls.YT_BASE_URL}/youtubei/v1/${action_type}${session.logged_in && session.cookie.length < 1 ? '' : `?key=${session.key}`}`, JSON.stringify(data), Constants.innertube_request_opts({ session, params: args.params })).catch((error) => error);
-  if (response instanceof Error) return { success: false, status_code: response.response.status, message: response.message };
-  return {
-    success: true,
-    status_code: response.status,
-    data: response.data
-  };
-}
-
-async function getContinuation(session, info = {}) {
-  let data = { context: session.context };
-
-  if (info.continuation_token) {
-    data.continuation = info.continuation_token;
-  }
-
-  if (info.video_id) {
-    data.videoId = info.video_id;
-    data.racyCheckOk = true;
-    data.contentCheckOk = false;
-    data.autonavState = 'STATE_NONE';
-    data.playbackContext = {
-      vis: 0,
-      lactMilliseconds: '-1'
-    };
-    data.captionsRequested = false;
-  }
-
-  const response = await Axios.post(`${Constants.urls.YT_BASE_URL}/youtubei/v1/next${session.logged_in && session.cookie.length < 1 ? '' : `?key=${session.key}`}`, JSON.stringify(data), Constants.innertube_request_opts({ session })).catch((error) => error);
-  if (response instanceof Error) return { success: false, status_code: response.response.status, message: response.message };
-  return {
-    success: true,
-    status_code: response.status,
-    data: response.data
-  };
-}
-
-module.exports = { engage, browse, notifications, livechat, getContinuation };

lib/Constants.js

@@ -1,335 +0,0 @@
-'use strict';
-
-const Utils = require('./Utils');
-
-const urls = {
-  YT_BASE_URL: 'https://www.youtube.com',
-  YT_MOBILE_URL: 'https://m.youtube.com',
-  YT_WATCH_PAGE: 'https://m.youtube.com/watch',
-};
-
-const oauth = {
-  scope: 'http://gdata.youtube.com https://www.googleapis.com/auth/youtube-paid-content',
-  grant_type: 'http://oauth.net/grant_type/device/1.0',
-  model_name: 'ytlr::'
-};
-
-const oauth_reqopts = {
-  headers: {
-    'accept': '*/*',
-    'origin': urls.YT_BASE_URL,
-    'user-agent': 'Mozilla/5.0 (ChromiumStylePlatform) Cobalt/Version',
-    'content-type': 'application/json',
-    'x-requested-with': 'mark.via.gp',
-    'referer': `${urls.YT_BASE_URL}/tv`,
-    'accept-language': 'en-US'
-  }
-};
-
-const default_headers = (session) => {
-  return {
-    headers: {
-      'Cookie': session.cookie,
-      'user-agent': Utils.getRandomUserAgent('desktop').userAgent,
-      'Referer': 'https://www.google.com/',
-      'Accept': 'text/html',
-      'Accept-Language': 'en-US,en',
-      'Accept-Encoding': 'gzip',
-      'Upgrade-Insecure-Requests': 1
-    }
-  };
-};
-
-const innertube_request_opts = (info) => {
-  if (info.desktop === undefined) info.desktop = true;
-  let req_opts = {
-    params: info.params || {},
-    headers: {
-      'accept': '*/*',
-      'user-agent': Utils.getRandomUserAgent(info.desktop ? 'desktop' : 'mobile').userAgent,
-      'content-type': 'application/json',
-      'accept-language': 'en-US,en;q=0.9',
-      'x-goog-authuser': 0,
-      'x-goog-visitor-id': info.session.context.client.visitorData,
-      'x-youtube-client-name': info.desktop ? 1 : 2,
-      'x-youtube-client-version': info.session.context.client.clientVersion,
-      'x-youtube-chrome-connected': 'source=Chrome,mode=0,enable_account_consistency=true,supervised=false,consistency_enabled_by_default=false',
-      'x-origin': info.desktop ? urls.YT_BASE_URL : urls.YT_MOBILE_URL,
-      'origin': info.desktop ? urls.YT_BASE_URL : urls.YT_MOBILE_URL,
-    }
-  };
-
-  if (info.session.logged_in && info.desktop) {
-    req_opts.headers.Cookie = info.session.cookie;
-    req_opts.headers.authorization = info.session.cookie.length < 1 ? `Bearer ${info.session.access_token}` : info.session.auth_apisid;
-  }
-
-  if (info.id) {
-    req_opts.headers.referer = (info.desktop ? urls.YT_BASE_URL : urls.YT_MOBILE_URL) + '/watch?v=' + info.id;
-  }
-
-  return req_opts;
-};
-
-const video_details_reqbody = (id, sts, context) => {
-  return {
-    playbackContext: {
-      contentPlaybackContext: {
-        'currentUrl': '/watch?v=' + id,
-        'vis': 0,
-        'splay': false,
-        'autoCaptionsDefaultOn': false,
-        'autonavState': 'STATE_OFF',
-        'html5Preference': 'HTML5_PREF_WANTS',
-        'signatureTimestamp': sts,
-        'referer': urls.YT_BASE_URL,
-        'lactMilliseconds': '-1'
-      }
-    },
-    context: context,
-    videoId: id
-  };
-};
-
-const stream_headers = (range) => {
-  let headers = {
-    'Accept': '*/*',
-    'User-Agent': Utils.getRandomUserAgent('desktop').userAgent,
-    'Connection': 'keep-alive',
-    'Origin': urls.YT_BASE_URL,
-    'Referer': urls.YT_BASE_URL,
-    'DNT': '?1'
-  };
-  if (range) {
-    headers.Range = range;
-  }
-  return headers;
-};
-
-const formatVideoData = (data, context, desktop) => {
-  let video_details = {};
-  let metadata = {};
-
-  if (desktop) {
-    metadata.embed = data.microformat.playerMicroformatRenderer.embed;
-    metadata.view_count = parseInt(data.videoDetails.viewCount);
-    metadata.average_rating = data.videoDetails.averageRating;
-    metadata.length_seconds = data.microformat.playerMicroformatRenderer.lengthSeconds;
-    metadata.channel_id = data.videoDetails.channelId;
-    metadata.channel_url = data.microformat.playerMicroformatRenderer.ownerProfileUrl;
-    metadata.external_channel_id = data.microformat.playerMicroformatRenderer.externalChannelId;
-    metadata.is_live_content = data.videoDetails.isLiveContent;
-    metadata.is_family_safe = data.microformat.playerMicroformatRenderer.isFamilySafe;
-    metadata.is_unlisted = data.microformat.playerMicroformatRenderer.isUnlisted;
-    metadata.is_private = data.videoDetails.isPrivate;
-    metadata.has_ypc_metadata = data.microformat.playerMicroformatRenderer.hasYpcMetadata;
-    metadata.category = data.microformat.playerMicroformatRenderer.category;
-    metadata.channel_name = data.microformat.playerMicroformatRenderer.ownerChannelName;
-    metadata.publish_date = data.microformat.playerMicroformatRenderer.publishDate || 'N/A';
-    metadata.upload_date = data.microformat.playerMicroformatRenderer.uploadDate || 'N/A';
-    metadata.keywords = data.videoDetails.keywords || [];
-
-    video_details.title = data.videoDetails.title;
-    video_details.description = data.videoDetails.shortDescription;
-    video_details.thumbnail = data.videoDetails.thumbnail.thumbnails.slice(-1)[0];
-    video_details.metadata = metadata;
-  } else {
-    metadata.embed = data[2].playerResponse.microformat.playerMicroformatRenderer.embed;
-    metadata.likes = parseInt(data[3].response.contents.singleColumnWatchNextResults.results.results.contents[1].slimVideoMetadataSectionRenderer.contents[1].slimVideoActionBarRenderer.buttons[0].slimMetadataToggleButtonRenderer.button.toggleButtonRenderer.defaultText.accessibility.accessibilityData.label.replace(/\D/g, ''));
-    metadata.dislikes = parseInt(data[3].response.contents.singleColumnWatchNextResults.results.results.contents[1].slimVideoMetadataSectionRenderer.contents[1].slimVideoActionBarRenderer.buttons[1].slimMetadataToggleButtonRenderer.button.toggleButtonRenderer.defaultText.accessibility.accessibilityData.label.replace(/\D/g, ''));
-    metadata.view_count = parseInt(data[2].playerResponse.videoDetails.viewCount);
-    metadata.average_rating = data[2].playerResponse.videoDetails.averageRating;
-    metadata.length_seconds = data[2].playerResponse.microformat.playerMicroformatRenderer.lengthSeconds;
-    metadata.channel_id = data[2].playerResponse.videoDetails.channelId;
-    metadata.channel_url = data[2].playerResponse.microformat.playerMicroformatRenderer.ownerProfileUrl;
-    metadata.external_channel_id = data[2].playerResponse.microformat.playerMicroformatRenderer.externalChannelId;
-    metadata.is_live_content = data[2].playerResponse.videoDetails.isLiveContent;
-    metadata.is_family_safe = data[2].playerResponse.microformat.playerMicroformatRenderer.isFamilySafe;
-    metadata.is_unlisted = data[2].playerResponse.microformat.playerMicroformatRenderer.isUnlisted;
-    metadata.is_private = data[2].playerResponse.videoDetails.isPrivate;
-    metadata.has_ypc_metadata = data[2].playerResponse.microformat.playerMicroformatRenderer.hasYpcMetadata;
-    metadata.category = data[2].playerResponse.microformat.playerMicroformatRenderer.category;
-    metadata.channel_name = data[2].playerResponse.microformat.playerMicroformatRenderer.ownerChannelName;
-    metadata.publish_date = data[2].playerResponse.microformat.playerMicroformatRenderer.publishDate;
-    metadata.upload_date = data[2].playerResponse.microformat.playerMicroformatRenderer.uploadDate;
-    metadata.keywords = data[2].playerResponse.videoDetails.keywords;
-
-    video_details.title = data[2].playerResponse.videoDetails.title;
-    video_details.description = data[2].playerResponse.videoDetails.shortDescription;
-    video_details.thumbnail = data[2].playerResponse.videoDetails.thumbnail.thumbnails.slice(-1)[0];
-
-    // Functions
-    video_details.like = () => {};
-    video_details.dislike = () => {};
-    video_details.removeLike = () => {};
-    video_details.subscribe = () => {};
-    video_details.unsubscribe = () => {};
-    video_details.comment = () => {};
-    video_details.getComments = () => {};
-    video_details.setNotificationPref = () => {};
-    video_details.getLivechat = () => {};
-
-    // Additional metadata
-    video_details.metadata = metadata;
-  }
-  return video_details;
-};
-
-
-const base64_alphabet = {
-  normal: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_'.split(''),
-  reverse: '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_'.split('')
-};
-
-const filters = (order) => {
-  // TODO: Refactor this with protobuf encoding
-  switch (order) {
-    case 'any,any,relevance':
-      return 'EgIQAQ%3D%3D';
-    case 'hour,any,relevance':
-      return 'EgIIAQ%3D%3D';
-    case 'day,any,relevance':
-      return 'EgQIAhAB';
-    case 'week,any,relevance':
-      return 'EgQIAxAB';
-    case 'month,any,relevance':
-      return 'EgQIBBAB';
-    case 'year,any,relevance':
-      return 'EgQIBRAB';
-    case 'any,short,relevance':
-      return 'EgQQARgB';
-    case 'hour,short,relevance':
-      return 'EgYIARABGAE%3D';
-    case 'day,short,relevance':
-      return 'EgYIAhABGAE%3D';
-    case 'week,short,relevance':
-      return 'EgYIAxABGAE%3D';
-    case 'month,short,relevance':
-      return 'EgYIBBABGAE%3D';
-    case 'year,short,relevance':
-      return 'EgYIBRABGAE%3D';
-    case 'any,long,relevance':
-      return 'EgQQARgC';
-    case 'hour,long,relevance':
-      return 'EgYIARABGAI%3D';
-    case 'day,long,relevance':
-      return 'EgYIAhABGAI%3D';
-    case 'week,long,relevance':
-      return 'EgYIAxABGAI%3D';
-    case 'month,long,relevance':
-      return 'EgYIBBABGAI%3D';
-    case 'year,long,relevance':
-      return 'EgYIBRABGAI%3D';
-    case 'any,any,age':
-      return 'CAISAhAB';
-    case 'hour,any,age':
-      return 'CAISBAgBEAE%3D';
-    case 'day,any,age':
-      return 'CAISBAgCEAE%3D';
-    case 'week,any,age':
-      return 'CAISBAgDEAE%3D';
-    case 'month,any,age':
-      return 'CAISBAgEEAE%3D';
-    case 'year,any,age':
-      return 'CAISBAgFEAE%3D';
-    case 'any,short,age':
-      return 'CAISBBABGAE%3D';
-    case 'hour,short,age':
-      return 'CAISBggBEAEYAQ%3D%3D';
-    case 'day,short,age':
-      return 'CAISBggCEAEYAQ%3D%3D';
-    case 'week,short,age':
-      return 'CAISBggDEAEYAQ%3D%3D';
-    case 'month,short,age':
-      return 'CAISBggEEAEYAQ%3D%3D';
-    case 'year,short,age':
-      return 'CAISBggFEAEYAQ%3D%3D';
-    case 'any,long,age':
-      return 'CAISBBABGAI%3D';
-    case 'hour,long,age':
-      return 'CAISBggBEAEYAg%3D%3D';
-    case 'day,long,age':
-      return 'CAISBggCEAEYAg%3D%3D';
-    case 'week,long,age':
-      return 'CAISBggDEAEYAg%3D%3D';
-    case 'month,long,age':
-      return 'CAISBggEEAEYAg%3D%3D';
-    case 'year,long,age':
-      return 'CAISBggFEAEYAg%3D%3D';
-    case 'any,any,views':
-      return 'CAMSAhAB';
-    case 'hour,any,views':
-      return 'CAMSBAgBEAE%3D';
-    case 'day,any,views':
-      return 'CAMSBAgCEAE%3D';
-    case 'week,any,views':
-      return 'CAMSBAgDEAE%3D';
-    case 'month,any,views':
-      return 'CAMSBAgEEAE%3D';
-    case 'year,any,views':
-      return 'CAMSBAgFEAE%3D';
-    case 'any,short,views':
-      return 'CAMSBBABGAE%3D';
-    case 'hour,short,views':
-      return 'CAMSBggBEAEYAQ%3D%3D';
-    case 'day,short,views':
-      return 'CAMSBggCEAEYAQ%3D%3D';
-    case 'week,short,views':
-      return 'CAMSBggDEAEYAQ%3D%3D';
-    case 'month,short,views':
-      return 'CAMSBggEEAEYAQ%3D%3D';
-    case 'year,short,views':
-      return 'CAMSBggFEAEYAQ%3D%3D';
-    case 'any,long,views':
-      return 'CAMSBBABGAI%3D';
-    case 'hour,long,views':
-      return 'CAMSBggBEAEYAg%3D%3D';
-    case 'day,long,views':
-      return 'CAMSBggCEAEYAg%3D%3D';
-    case 'week,long,views':
-      return 'CAMSBggDEAEYAg%3D%3D';
-    case 'month,long,views':
-      return 'CAMSBggEEAEYAg%3D%3D';
-    case 'year,long,views':
-      return 'CAMSBggFEAEYAg%3D%3D';
-    case 'any,any,rating':
-      return 'CAESAhAB';
-    case 'hour,any,rating':
-      return 'CAESBAgBEAE%3D';
-    case 'day,any,rating':
-      return 'CAESBAgCEAE%3D';
-    case 'week,any,rating':
-      return 'CAESBAgDEAE%3D';
-    case 'month,any,rating':
-      return 'CAESBAgEEAE%3D';
-    case 'year,any,rating':
-      return 'CAESBAgFEAE%3D';
-    case 'any,short,rating':
-      return 'CAESBBABGAE%3D';
-    case 'hour,short,rating':
-      return 'CAESBggBEAEYAQ%3D%3D';
-    case 'day,short,rating':
-      return 'CAESBggCEAEYAQ%3D%3D';
-    case 'week,short,rating':
-      return 'CAESBggDEAEYAQ%3D%3D';
-    case 'month,short,rating':
-      return 'CAESBggEEAEYAQ%3D%3D';
-    case 'year,short,rating':
-      return 'CAESBggFEAEYAQ%3D%3D';
-    case 'any,long,rating':
-      return 'CAESBBABGAI%3D';
-    case 'hour,long,rating':
-      return 'CAESBggBEAEYAg%3D%3D';
-    case 'day,long,rating':
-      return 'CAESBggCEAEYAg%3D%3D';
-    case 'week,long,rating':
-      return 'CAESBggDEAEYAg%3D%3D';
-    case 'month,long,rating':
-      return 'CAESBggEEAEYAg%3D%3D';
-    case 'year,long,rating':
-      return 'CAESBggFEAEYAg%3D%3D';
-    default:
-  }
-};
-
-module.exports = { urls, oauth, oauth_reqopts, default_headers, innertube_request_opts, video_details_reqbody, stream_headers, formatVideoData, base64_alphabet, filters };

lib/NToken.js

@@ -1,129 +0,0 @@
-'use strict';
-
-const Utils = require('./Utils');
-const Constants = require('./Constants');
-
-class NToken {
-  constructor(raw_code) {
-    this.raw_code = raw_code;
-    this.null_placeholder_regex = /c\[(.*?)\]=c/g;
-    this.transformation_args_regex = /c\[(.*?)\]\((.+?)\)/g;
-  }
-
-  transform(n) {
-    let n_token = n.split('');
-    let transformations = this.getTransformationData(this.raw_code);
-
-    // Identifies the necessary transformation functions and emulates them accordingly.
-    transformations = transformations.map((el) => {
-      if (el != null && typeof el != 'number') {
-        const is_reverse_base64 = el.includes('case 65:');
-        if (el.includes('function(d){for(var')) {
-          el = (arr) => this.pushSplice(arr);
-        } else if (el.includes('d.push(e)')) {
-          el = (arr, item) => this.push(arr, item);
-        } else if (el.includes('d.reverse()')) {
-          el = (arr) => this.reverse(arr);
-        } else if (el.includes('d.length;d.splice(e,1)')) {
-          el = (arr, index) => this.spliceOnce(arr, index);
-        } else if (el.includes('d[0])[0])')) {
-          el = (arr, index) => this.spliceTwice(arr, index);
-        } else if (el.includes('reverse().forEach')) {
-          el = (arr, index) => this.spliceReverseUnshift(arr, index);
-        } else if (el.includes('f=d[0];d[0]')) {
-          el = (arr, index) => this.swapFirstItem(arr, index);
-        } else if (el.includes('unshift(d.pop())')) {
-          el = (arr, index) => this.unshiftPop(arr, index);
-        } else if (el.includes('switch')) {
-          el = (arr, e) => this.translateAB(arr, e, is_reverse_base64);
-        } else if (el === 'b') {
-          el = n_token;
-        }
-      }
-      return el;
-    });
-
-    // Fills the null placeholders with a copy of the transformations array.
-    let null_placeholder_positions = [...this.raw_code.matchAll(this.null_placeholder_regex)].map((item) => parseInt(item[1]));
-    null_placeholder_positions.forEach((pos) => transformations[pos] = transformations);
-
-    // Parses and emulates calls to functions of the transformations array.
-    let transformation_args = [...Utils.getStringBetweenStrings(this.raw_code.replace(/\n/g, ''), 'try{', '}catch').matchAll(this.transformation_args_regex)].map((params) => ({ index: params[1], params: params[2] }));
-    transformation_args.forEach((data) => {
-      const index = data.index;
-      const param_index = data.params.split(',').map((param) => param.match(/c\[(.*?)\]/)[1]);
-      transformations[index](transformations[param_index[0]], transformations[param_index[1]]);
-    });
-
-    return n_token.join('');
-  }
-
-  getTransformationData() {
-    let transformation_data = '[' + Utils.getStringBetweenStrings(this.raw_code, 'c=[', '];c') + ']';
-    transformation_data = transformation_data
-      .replace(/function\(d,e\)/g, '"function(d,e)')
-      .replace(/function\(d\)/g, '"function(d)')
-      .replace(/,b,/g, ',"b",')
-      .replace(/,b/g, ',"b"')
-      .replace(/b,/g, '"b",')
-      .replace(/b]/g, '"b"]')
-      .replace(/},/g, '}",')
-      .replace(/""/g, '')
-      .replace(/length]\)}"/g, 'length])}');
-
-    return JSON.parse(transformation_data);
-  }
-
-  translateAB(arr, e, is_reverse_base64) {
-    let characters = is_reverse_base64 && Constants.base64_alphabet.reverse || Constants.base64_alphabet.normal;
-    arr.forEach(function(char, index, loc) {
-      this.push(loc[index] = characters[(characters.indexOf(char) - characters.indexOf(this[index]) + 64) % characters.length]);
-    }, e.split(''));
-  }
-
-  unshiftPop(arr, index) {
-    index = (index % arr.length + arr.length) % arr.length;
-    for (; index--;) {
-      arr.unshift(arr.pop());
-    }
-  }
-
-  swapFirstItem(arr, index) {
-    let oldValue = arr[0];
-    index = (index % arr.length + arr.length) % arr.length;
-    arr[0] = arr[index];
-    arr[index] = oldValue;
-  }
-
-  spliceReverseUnshift(arr, index) {
-    index = (index % arr.length + arr.length) % arr.length;
-    arr.splice(-index).reverse().forEach(function(f) {
-      arr.unshift(f);
-    });
-  }
-
-  spliceOnce(arr, index) {
-    index = (index % arr.length + arr.length) % arr.length;
-    arr.splice(index, 1);
-  }
-
-  spliceTwice(arr, index) {
-    index = (index % arr.length + arr.length) % arr.length;
-    arr.splice(0, 1, arr.splice(index, 1, arr[0])[0]);
-  }
-
-  pushSplice(arr) {
-    for (let index = arr.length; index;)
-      arr.push(arr.splice(--index, 1)[0]);
-  }
-
-  push(arr, item) {
-    arr.push(item);
-  }
-
-  reverse(arr) {
-    arr.reverse();
-  }
-}
-
-module.exports = NToken;

lib/OAuth.js

@@ -1,171 +0,0 @@
-'use strict';
-
-const Axios = require('axios');
-const Utils = require('./Utils');
-const Constants = require('./Constants');
-const EventEmitter = require('events');
-const Uuid = require("uuid");
-
-class OAuth extends EventEmitter {
-  constructor(creds) {
-    super();
-    // Default interval between requests when waiting for authorization.
-    this.refresh_interval = 5;
-
-    // OAuth URLs:
-    this.oauth_code_url = `${Constants.urls.YT_BASE_URL}/o/oauth2/device/code`;
-    this.oauth_token_url = `${Constants.urls.YT_BASE_URL}/o/oauth2/token`;
-
-    // Used to check whether an access token is valid or not.
-    this.guide_url = `${Constants.urls.YT_BASE_URL}/youtubei/v1/guide`;
-
-    // These are always the same, so we shouldn't have any problems for now.
-    this.model_name = Constants.oauth.model_name;
-    this.grant_type = Constants.oauth.grant_type;
-    this.scope = Constants.oauth.scope;
-
-    // Script that contains important information such as client id and client secret.
-    this.auth_script_regex = /<script id=\"base-js\" src=\"(.*?)\" nonce=".*?"><\/script>/;
-
-    // Used to find the credentials inside the script.
-    this.identity_regex = /var .+?=\"(?<id>.+?)\",[.|\s].?=\"(?<secret>.+?)\"/;
-
-    if (creds.access_token != undefined && creds.refresh_token != undefined) return;
-    this.requestAuthCode();
-  }
-
-  waitForAuth(device_code) {
-    const data = {
-      client_id: this.client_id,
-      client_secret: this.client_secret,
-      code: device_code,
-      grant_type: this.grant_type
-    };
-
-    setTimeout(async () => {
-      const response = await Axios.post(this.oauth_token_url, JSON.stringify(data), Constants.oauth_reqopts).catch((error) => error);
-      if (response instanceof Error)
-        return this.emit('auth', {
-          error: 'Could not get auth token.',
-          status: 'FAILED'
-        });
-
-      if (response.data.error) {
-        switch (response.data.error) {
-          case 'slow_down':
-          case 'authorization_pending':
-            this.waitForAuth(device_code);
-            break;
-          case 'access_denied':
-            this.emit('auth', {
-              error: 'The access was denied.',
-              status: 'ACCESS_DENIED'
-            });
-            break;
-          case 'expired_token':
-            this.emit('auth', {
-              error: 'The device code has expired, requesting a new one.',
-              status: 'DEVICE_CODE_EXPIRED'
-            });
-            this.requestAuthCode();
-            break;
-          default:
-        }
-      } else {
-        this.emit('auth', {
-          access_token: response.data.access_token,
-          refresh_token: response.data.refresh_token,
-          token_type: response.data.token_type,
-          expires: response.data.expires_in,
-          scope: response.data.scope,
-          status: 'SUCCESS'
-        });
-      }
-    }, 1000 * this.refresh_interval);
-  }
-
-  async requestAuthCode() {
-    const identity = await this.getClientIdentity();
-    this.client_id = identity.id;
-    this.client_secret = identity.secret;
-
-    const data = {
-      client_id: this.client_id,
-      scope: this.scope,
-      device_id: Uuid.v4(),
-      model_name: this.model_name
-    };
-
-    const response = await Axios.post(this.oauth_code_url, JSON.stringify(data), Constants.oauth_reqopts).catch((error) => error);
-    if (response instanceof Error)
-      return this.emit('auth', {
-        error: 'Could not get auth code.',
-        status: 'FAILED'
-      });
-
-    this.emit('auth', {
-      code: response.data.user_code,
-      status: 'AUTHORIZATION_PENDING',
-      expires_in: response.data.expires_in,
-      verification_url: response.data.verification_url
-    });
-
-    this.refresh_interval = response.data.interval;
-
-    // Keeps requesting at a specific rate until the authorization is granted or denied.
-    this.waitForAuth(response.data.device_code);
-  }
-
-  async getClientIdentity() {
-    // The first request is made to get the auth script url, hard-coding it isn't viable as it changes overtime.
-    const yttv_response = await Axios.get(`${Constants.urls.YT_BASE_URL}/tv`, Constants.oauth_reqopts).catch((error) => error);
-    if (yttv_response instanceof Error) throw new Error(`Could not get identify: ${yttv_response.message}`);
-
-    // Here we get the script and extract the necessary data to proceed with the auth flow.
-    const url_body = this.auth_script_regex.exec(yttv_response.data)[1];
-    const script_url = `${Constants.urls.YT_BASE_URL}/${url_body}`;
-    const response = await Axios.get(script_url, Constants.default_headers).catch((error) => error);
-    if (response instanceof Error) throw new Error(`Could not fetch data from auth script: ${response.message}`);
-
-    const identity_function = Utils.getStringBetweenStrings(response.data, '=function(){var a=window.environment', '(function()');
-    const client_identity = identity_function.match(this.identity_regex).groups;
-    return client_identity;
-  }
-
-  async refreshAccessToken(refresh_token) {
-    const identity = await this.getClientIdentity();
-
-    const data = {
-      client_id: identity.id,
-      client_secret: identity.secret,
-      refresh_token,
-      grant_type: 'refresh_token',
-    };
-
-    const response = await Axios.post(this.oauth_token_url, JSON.stringify(data), Constants.oauth_reqopts).catch((error) => error);
-    if (response instanceof Error)
-      return this.emit('refresh-token', {
-        error: 'Could not refresh token.',
-        status: 'FAILED'
-      });
-
-    this.emit('refresh-token', {
-      access_token: response.data.access_token,
-      token_type: response.data.token_type,
-      expires: response.data.expires_in,
-      scope: response.data.scope,
-      status: 'SUCCESS'
-    });
-  }
-
-  async checkTokenValidity(access_token, session) {
-    let headers = Constants.innertube_request_opts({ session }).headers;
-    headers.authorization = `Bearer ${access_token}`;
-
-    const response = await Axios.post(this.guide_url, JSON.stringify({ context: session.context }), { headers }).catch((error) => error);
-    if (response instanceof Error) return 'INVALID';
-    return 'VALID';
-  }
-}
-
-module.exports = OAuth;

lib/Player.js

@@ -1,43 +0,0 @@
-'use strict';
-
-const fs = require('fs');
-const Axios = require('axios');
-const Utils = require('./Utils');
-const Constants = require('./Constants');
-
-class Player {
-  constructor(innertube_session) {
-    this.session = innertube_session;
-    this.player_name = Utils.getStringBetweenStrings(this.session.player_url, '/player/', '/');
-    this.tmp_cache_dir = __dirname.slice(0, -3) + 'cache';
-  }
-
-  async init() {
-    if (fs.existsSync(`${this.tmp_cache_dir}/${this.player_name}.js`)) {
-      const player_data = fs.readFileSync(`${this.tmp_cache_dir}/${this.player_name}.js`).toString();
-      this.getSigDecipherCode(player_data);
-      this.getNEncoder(player_data);
-    } else {
-      const response = await Axios.get(`${Constants.urls.YT_BASE_URL}${this.session.player_url}`, { path: this.session.playerUrl, headers: { 'content-type': 'text/javascript', 'user-agent': Utils.getRandomUserAgent('desktop').userAgent } }).catch((error) => error);
-      if (response instanceof Error) throw new Error('Could not get player data: ' + response.message);
-
-      fs.mkdirSync(this.tmp_cache_dir, { recursive: true });
-      fs.writeFileSync(`${this.tmp_cache_dir}/${this.player_name}.js`, response.data);
-
-      this.getSigDecipherCode(response.data);
-      this.getNEncoder(response.data);
-    }
-  }
-
-  getSigDecipherCode(data) {
-    const manipulation_algorithm_code = Utils.getStringBetweenStrings(data, 'this.audioTracks};var', '};');
-    const manipulation_sequence_code = Utils.getStringBetweenStrings(data, 'function(a){a=a.split("")', 'return a.join("")}');
-    this.sig_decipher_sc = manipulation_algorithm_code + manipulation_sequence_code;
-  }
-
-  getNEncoder(data) {
-    this.ntoken_sc = 'var b=a.split("")' + Utils.getStringBetweenStrings(data, 'b=a.split("")', '}return b.join("")}') + '} return b.join("");';
-  }
-}
-
-module.exports = Player;

lib/Utils.js

@@ -1,86 +0,0 @@
-'use strict';
-
-const Fs = require('fs');
-const Proto = require('protons');
-const Crypto = require('crypto');
-const UserAgent = require('user-agents');
-
-function getRandomUserAgent(type) {
-  switch (type) {
-    case 'mobile':
-      return new UserAgent(/Android/).data;
-    case 'desktop':
-      return new UserAgent({ deviceCategory: 'desktop' }).data;
-    default:
-  }
-}
-
-function generateSidAuth(sid) {
-  const youtube = 'https://www.youtube.com';
-  const timestamp = Math.floor(new Date().getTime() / 1000);
-  const input = [timestamp, sid, youtube].join(' ');
-
-  let hash = Crypto.createHash('sha1');
-  let data = hash.update(input, 'utf-8');
-  let gen_hash = data.digest('hex');
-
-  return ['SAPISIDHASH', [timestamp, gen_hash].join('_')].join(' ');
-}
-
-function getStringBetweenStrings(data, start_string, end_string) {
-  const regex = new RegExp(`${escapeStringRegexp(start_string)}(.*?)${escapeStringRegexp(end_string)}`, "s");
-  const match = data.match(regex);
-  return match ? match[1] : undefined;
-}
-
-function escapeStringRegexp(string) {
-  return string.replace(/[|\\{}()[\]^$+*?.]/g, "\\$&").replace(/-/g, "\\x2d");
-}
-
-function encodeNotificationPref(channel_id, index) {
-  const youtube_proto = Proto(Fs.readFileSync(`${__dirname}/proto/youtube.proto`));
-
-  const buf = youtube_proto.NotificationPreferences.encode({
-    channel_id,
-    pref_id: {
-      index
-    },
-    number_0: 0,
-    number_1: 4
-  });
-
-  return encodeURIComponent(Buffer.from(buf).toString('base64'));
-}
-
-function generateMessageParams(channel_id, video_id) {
-  const youtube_proto = Proto(Fs.readFileSync(`${__dirname}/proto/youtube.proto`));
-
-  const buf = youtube_proto.LiveMessageParams.encode({
-    params: {
-      ids: {
-        channel_id,
-        video_id
-      }
-    },
-    number_0: 1,
-    number_1: 4
-  });
-
-  return Buffer.from(encodeURIComponent(Buffer.from(buf).toString('base64'))).toString('base64');
-}
-
-function generateCommentParams(video_id) {
-  const youtube_proto = Proto(Fs.readFileSync(`${__dirname}/proto/youtube.proto`));
-
-  const buf = youtube_proto.CreateCommentParams.encode({
-    video_id,
-    params: {
-      index: 0
-    },
-    number: 7
-  });
-
-  return encodeURIComponent(Buffer.from(buf).toString('base64'));
-}
-
-module.exports = { getRandomUserAgent, generateSidAuth, getStringBetweenStrings, generateMessageParams, generateCommentParams, encodeNotificationPref };

lib/core/Actions.js

@@ -0,0 +1,413 @@
+'use strict';
+
+const Uuid = require('uuid');
+const Axios = require('axios');
+const Proto = require('../proto');
+const Constants = require('../utils/Constants');
+
+/**
+ * Performs direct interactions on YouTube.
+ *
+ * @param {Innertube} session - A valid Innertube session.
+ * @param {string} engagement_type - Type of engagement.
+ * @param {object} args - Engagement arguments.
+ * @returns {Promise.<{ success: boolean; status_code: number; data: object; message?: string }>}
+ */
+async function engage(session, engagement_type, args = {}) {
+  if (!session.logged_in) throw new Error('You are not signed in');
+
+  const data = { context: session.context };
+  switch (engagement_type) {
+    case 'like/like':
+    case 'like/dislike':
+    case 'like/removelike':
+      data.target = {
+        videoId: args.video_id
+      }
+      break;
+    case 'subscription/subscribe':
+    case 'subscription/unsubscribe':
+      data.channelIds = [args.channel_id];
+      data.params = engagement_type == 'subscription/subscribe' ? 'EgIIAhgA' : 'CgIIAhgA';
+      break;
+    case 'comment/create_comment':
+      data.commentText = args.text;
+      data.createCommentParams = Proto.encodeCommentParams(args.video_id);
+      break;
+    case 'comment/create_comment_reply':
+      data.createReplyParams = Proto.encodeCommentReplyParams(args.comment_id, args.video_id);
+      data.commentText = args.text;
+      break;
+    case 'comment/perform_comment_action':
+      const action = ({
+        like: () => Proto.encodeCommentActionParams(5, args.comment_id, args.video_id, args.channel_id),
+        dislike: () => Proto.encodeCommentActionParams(4, args.comment_id, args.video_id, args.channel_id),
+      })[args.comment_action]();
+      data.actions = [action];
+      break;
+    default:
+      throw new Utils.InnertubeError('Invalid action', action);
+  }
+
+  const response = await session.YTRequester.post(`/${engagement_type}`, JSON.stringify(data)).catch((error) => error);
+  if (response instanceof Error) return { success: false, status_code: response.response?.status || 0, message: response.message };
+
+  return {
+    success: true,
+    status_code: response.status
+  };
+}
+
+/**
+ * Accesses YouTube's various sections.
+ *
+ * @param {Innertube} session - A valid Innertube session.
+ * @param {string} action - Type of action.
+ * @param {object} args - Action argumenets.
+ * @returns {Promise.<{ success: boolean; status_code: number; data: object; message?: string }>}
+ */
+async function browse(session, action, args = {}) {
+  if (!session.logged_in && action != 'home_feed' &&
+    action !== 'lyrics' && action !== 'music_playlist' &&
+    action !== 'playlist')
+    throw new Error('You are not signed in');
+
+  const data = { context: session.context };
+  switch (action) {
+    case 'account_notifications':
+      data.browseId = 'SPaccount_notifications';
+      break;
+    case 'account_privacy':
+      data.browseId = 'SPaccount_privacy';
+      break;
+    case 'history':
+      data.browseId = 'FEhistory';
+      break;
+    case 'home_feed':
+      data.browseId = 'FEwhat_to_watch';
+      break;
+    case 'subscriptions_feed':
+      data.browseId = 'FEsubscriptions';
+      break;
+    case 'lyrics':
+    case 'music_playlist':
+      const context = JSON.parse(JSON.stringify(session.context)); // deep copy the context obj so we don't accidentally change it
+
+      context.client.originalUrl = Constants.URLS.YT_MUSIC;
+      context.client.clientVersion = Constants.YTMUSIC_VERSION;
+      context.client.clientName = 'WEB_REMIX';
+
+      data.context = context;
+      data.browseId = args.browse_id;
+      break;
+    case 'channel':
+    case 'playlist':
+      data.browseId = args.browse_id;
+      break;
+    case 'continuation':
+      data.continuation = args.ctoken;
+      break;
+    default:
+      throw new Utils.InnertubeError('Invalid action', action);
+  }
+
+  const requester = args.ytmusic && session.YTMRequester || session.YTRequester;
+  const response = await requester.post('/browse', JSON.stringify(data)).catch((error) => error);
+  if (response instanceof Error) return { success: false, status_code: response.response?.status || 0, message: response.message };
+
+  return {
+    success: true,
+    status_code: response.status,
+    data: response.data
+  };
+}
+
+
+/**
+ * Account settings endpoints.
+ *
+ * @param {Innertube} session - A valid Innertube session.
+ * @param {string} action - Type of action.
+ * @param {object} args - Action argumenets.
+ * @returns {Promise.<{ success: boolean; status_code: number; data: object; message?: string }>}
+ */
+async function account(session, action, args = {}) {
+  if (!session.logged_in) throw new Error('You are not signed in');
+
+  const data = {};
+  switch (action) {
+    case 'account/account_menu':
+      data.context = session.context;
+      break;
+    case 'account/set_setting':
+      data.context = session.context;
+      data.newValue = { boolValue: args.new_value };
+      data.settingItemId = args.setting_item_id;
+      break;
+    default:
+      throw new Utils.InnertubeError('Invalid action', action);
+  }
+
+  const response = await session.YTRequester.post(`/${action}`, JSON.stringify(data)).catch((error) => error);
+  if (response instanceof Error) return { success: false, status_code: response.response?.status || 0, message: response.message };
+
+  return {
+    success: true,
+    status_code: response.status,
+    data: response.data
+  };
+}
+
+/**
+ * Accesses YouTube Music endpoints (/youtubei/v1/music/).
+ * 
+ * @param {Innertube} session - A valid Innertube session.
+ * @param {string} action - Type of action.
+ * @param {object} args - Action arguments.
+ * @todo Implement more actions.
+ * @returns {Promise.<{ success: boolean; status_code: number; data: object; message?: string }>}
+ */
+async function music(session, action, args) {
+  const context = JSON.parse(JSON.stringify(session.context)); // deep copy the context obj so we don't accidentally change it
+
+  context.client.originalUrl = Constants.URLS.YT_MUSIC;
+  context.client.clientVersion = Constants.YTMUSIC_VERSION;
+  context.client.clientName = 'WEB_REMIX';
+
+  let data;
+
+  switch (action) {
+    case 'get_search_suggestions':
+      data.context = context;
+      data.input = args.input || '';
+      break;
+    default:
+      throw new Utils.InnertubeError('Invalid action', action);
+  }
+
+  const response = await session.YTMRequester.post(`/music/${action}`, JSON.stringify(data)).catch((error) => error);
+  if (response instanceof Error) return { success: false, status_code: response.response?.status || 0, message: response.message };
+
+  return {
+    success: true,
+    status_code: response.status,
+    data: response.data
+  };
+}
+
+/**
+ * Searches a given query on YouTube/YTMusic.
+ *
+ * @param {Innertube} session - A valid Innertube session.
+ * @param {string} client - YouTube client: YOUTUBE | YTMUSIC
+ * @param {object} args - Search arguments.
+ * @returns {Promise.<{ success: boolean; status_code: number; data: object; message?: string }>}
+ */
+async function search(session, client, args = {}) {
+  const data = { context: session.context };
+  switch (client) {
+    case 'YOUTUBE':
+      if (args.query) {
+        data.params = Proto.encodeSearchFilter(args.options.period, args.options.duration, args.options.order);
+        data.query = args.query;
+      } else {
+        data.continuation = args.ctoken;
+      }
+      break;
+    case 'YTMUSIC':
+      const context = JSON.parse(JSON.stringify(session.context)); // deep copy the context obj so we don't accidentally change it
+
+      context.client.originalUrl = Constants.URLS.YT_MUSIC;
+      context.client.clientVersion = Constants.YTMUSIC_VERSION;
+      context.client.clientName = 'WEB_REMIX';
+
+      data.context = context;
+      data.query = args.query;
+      break;
+    default:
+      throw new Utils.InnertubeError('Invalid client', action);
+  }
+
+  const requester = client == 'YOUTUBE' && session.YTRequester || session.YTMRequester;
+  const response = await requester.post('/search', JSON.stringify(data)).catch((error) => error);
+  if (response instanceof Error) return { success: false, status_code: response.response?.status || 0, message: response.message };
+
+  return {
+    success: true,
+    status_code: response.status,
+    data: response.data
+  };
+}
+
+/**
+ * Interacts with YouTube's notification system.
+ *
+ * @param {Innertube} session - A valid Innertube session.
+ * @param {string} action - Type of action.
+ * @param {object} args - Action arguments.
+ * @returns {Promise.<{ success: boolean; status_code: number; data: object; message?: string }>}
+ */
+async function notifications(session, action, args = {}) {
+  if (!session.logged_in) throw new Error('You are not signed in');
+
+  const data = {};
+  switch (action) {
+    case 'modify_channel_preference':
+      const pref_types = { PERSONALIZED: 1, ALL: 2, NONE: 3 };
+      data.context = session.context;
+      data.params = Proto.encodeNotificationPref(args.channel_id, pref_types[args.pref.toUpperCase()]);
+      break;
+    case 'get_notification_menu':
+      data.context = session.context;
+      data.notificationsMenuRequestType = 'NOTIFICATIONS_MENU_REQUEST_TYPE_INBOX';
+      args.ctoken && (data.ctoken = args.ctoken);
+      break;
+    case 'get_unseen_count':
+      data.context = session.context;
+      break;
+    default:
+      throw new Utils.InnertubeError('Invalid action', action);
+  }
+
+  const response = await session.YTRequester.post(`/notification/${action}`, JSON.stringify(data)).catch((err) => err);
+  if (response instanceof Error) return { success: false, status_code: response.response?.status || 0, message: response.message };
+  if (action === 'modify_channel_preference') return { success: true, status_code: response.status };
+
+  return {
+    success: true,
+    status_code: response.status,
+    data: response.data
+  };
+}
+
+/**
+ * Interacts with YouTube's livechat system.
+ *
+ * @param {Innertube} session - A valid Innertube session.
+ * @param {string} action - Type of action.
+ * @param {object} args - Action arguments.
+ * @returns {Promise.<{ success: boolean; data: object; message?: string }>}
+ */
+async function livechat(session, action, args = {}) {
+  const data = {};
+  switch (action) {
+    case 'live_chat/get_live_chat':
+      data.context = session.context;
+      data.continuation = args.ctoken;
+      break;
+    case 'live_chat/send_message':
+      data.context = session.context;
+      data.params = Proto.encodeMessageParams(args.channel_id, args.video_id);
+      data.clientMessageId = `ytjs-${Uuid.v4()}`;
+      data.richMessage = {
+        textSegments: [{ text: args.text }]
+      }
+      break;
+    case 'live_chat/get_item_context_menu':
+      data.context = session.context;
+      break;
+    case 'live_chat/moderate':
+      data.context = session.context;
+      data.params = args.cmd_params;
+      break;
+    case 'updated_metadata':
+      data.context = session.context;
+      data.videoId = args.video_id;
+      args.continuation && (data.continuation = args.continuation);
+      break;
+    default:
+      throw new Utils.InnertubeError('Invalid action', action);
+  }
+
+  const response = await session.YTRequester.post(`/${action}`, JSON.stringify(data)).catch((err) => err);
+  if (response instanceof Error) return { success: false, message: response.message };
+
+  return { success: true, data: response.data };
+}
+
+/**
+ * Requests continuation for previously performed actions.
+ *
+ * @param {Innertube} session - A valid Innertube session.
+ * @param {object} args - Continuation arguments.
+ * @returns {Promise.<{ success: boolean; status_code: number; data: object; message?: string }>} 
+ */
+async function next(session, args = {}) {
+  let data = { context: session.context };
+  args.continuation_token && (data.continuation = args.continuation_token);
+
+  if (args.video_id) {
+    data.videoId = args.video_id;
+    if (args.ytmusic) {
+      const context = JSON.parse(JSON.stringify(session.context)); // deep copy the context obj so we don't accidentally change it
+
+      context.client.originalUrl = Constants.URLS.YT_MUSIC;
+      context.client.clientVersion = Constants.YTMUSIC_VERSION;
+      context.client.clientName = 'WEB_REMIX';
+
+      data.context = context;
+      data.isAudioOnly = true;
+      data.tunerSettingValue = 'AUTOMIX_SETTING_NORMAL';
+    } else {
+      data.racyCheckOk = true;
+      data.contentCheckOk = false;
+      data.autonavState = 'STATE_NONE';
+      data.playbackContext = { vis: 0, lactMilliseconds: '-1' };
+      data.captionsRequested = false;
+    }
+  }
+
+  const requester = args.ytmusic && session.YTMRequester || session.YTRequester;
+  const response = await requester.post('/next', JSON.stringify(data)).catch((error) => error);
+
+  if (response instanceof Error) return {
+    success: false,
+    status_code: response.response?.status || 0,
+    message: response.message
+  };
+
+  return {
+    success: true,
+    status_code: response.status,
+    data: response.data
+  };
+}
+
+/**
+ * Retrieves video data.
+ *
+ * @param {Innertube} session - A valid Innertube session.
+ * @param {object} args - Request arguments.
+ * @returns {Promise.<object>} - Video data.
+ */
+async function getVideoInfo(session, args = {}) {
+  const response = await session.YTRequester.post(`/player`, JSON.stringify(Constants.VIDEO_INFO_REQBODY(args.id, session.sts, session.context))).catch((err) => err);
+  if (response instanceof Error) throw new Error(`Could not get video info: ${response.message}`);
+  return response.data;
+}
+
+/**
+ * Gets search suggestions.
+ * 
+ * @param {Innertube} session - A valid innertube session
+ * @param {string} query - Search query
+ * @returns {Promise.<{ success: boolean; status_code: number; data: object; message?: string }>}
+ */
+async function getYTSearchSuggestions(session, query) {
+  const response = await Axios.get(`${Constants.URLS.YT_SUGGESTIONS}search?client=firefox&ds=yt&q=${encodeURIComponent(query)}`,
+    Constants.DEFAULT_HEADERS(session)).catch((error) => error);
+
+  if (response instanceof Error) return {
+    success: false,
+    status_code: response.status,
+    message: response.message
+  };
+
+  return {
+    success: true,
+    status_code: response.status,
+    data: response.data
+  };
+}
+
+module.exports = { engage, browse, account, music, search, notifications, livechat, getVideoInfo, next, getYTSearchSuggestions };

lib/core/Livechat.js

@@ -1,13 +1,15 @@
 'use strict';
 
-const Axios = require('axios');
 const Actions = require('./Actions');
-const Constants = require('./Constants');
 const EventEmitter = require('events');
 
 class Livechat extends EventEmitter {
   constructor(session, token, channel_id, video_id) {
     super(session);
+
+    if (!token)
+      throw new Error('Could not retrieve livechat data');
+
     this.ctoken = token;
     this.session = session;
     this.video_id = video_id;
@@ -19,12 +21,55 @@ class Livechat extends EventEmitter {
     this.poll_intervals_ms = 1000;
     this.running = true;
 
-    this.poll();
+    this.#poll();
   }
 
-  enqueueActionGroup(group) {
+  async #poll() {
+    if (!this.running) return;
+
+    const livechat = await Actions.livechat(this.session, 'live_chat/get_live_chat', { ctoken: this.ctoken });
+    if (!livechat.success) {
+      this.emit('error', { message: `Failed polling livechat: ${livechat.message}. Retrying...` });
+      return await this.#poll();
+    }
+
+    const continuation_contents = livechat.data.continuationContents;
+    const action_group = continuation_contents.liveChatContinuation.actions;
+    this.#enqueueActionGroup(action_group);
+
+    this.message_queue.forEach((message) => {
+      if (this.id_cache.includes(message.id)) return;
+      setTimeout(() => this.emit('chat-update', message), message.timestamp / 1000 - new Date().getTime());
+      this.id_cache.push(message.id);
+    });
+
+    this.message_queue = [];
+
+    const data = { video_id: this.video_id };
+    if (this.metadata_ctoken) data.continuation = this.metadata_ctoken;
+
+    const updated_metadata = await Actions.livechat(this.session, 'updated_metadata', data);
+    if (!updated_metadata.success) {
+      this.emit('error', { message: `Failed polling livechat metadata: ${livechat.message}.` });
+    }
+
+    this.metadata_ctoken = updated_metadata.data.continuation.timedContinuationData.continuation;
+
+    const metadata = updated_metadata.data.actions;
+    this.emit('update-metadata', {
+      likes: metadata[1].updateToggleButtonTextAction.defaultText.simpleText,
+      view_count: {
+        simple_text: metadata[0].updateViewershipAction.viewCount.videoViewCountRenderer.viewCount.simpleText,
+        short_view_count: metadata[0].updateViewershipAction.viewCount.videoViewCountRenderer.extraShortViewCount.simpleText
+      }
+    });
+
+    this.livechat_poller = setTimeout(async () => await this.#poll(), this.poll_intervals_ms);
+  }
+
+  #enqueueActionGroup(group) {
     group.forEach((action) => {
-      if (!action.addChatItemAction) return; //TODO: handle different action types 
+      if (!action.addChatItemAction) return; //TODO: handle different action types
       const message_content = action.addChatItemAction.item.liveChatTextMessageRenderer;
       if (!message_content) return;
 
@@ -43,48 +88,6 @@ class Livechat extends EventEmitter {
     });
   }
 
-  async poll() {
-    if (!this.running) return;
-
-    let data;
-
-    data = { context: this.session.context, continuation: this.ctoken };
-    const livechat = await Axios.post(`${Constants.urls.YT_BASE_URL}/youtubei/v1/live_chat/get_live_chat${this.session.logged_in && this.session.cookie.length < 1 ? '' : `?key=${this.session.key}`}`, JSON.stringify(data), Constants.innertube_request_opts({ session: this.session, data, desktop: true }));
-    if (livechat instanceof Error) throw new Error(`Error polling livechat: ${livechat.message}`);
-
-    const continuation_contents = livechat.data.continuationContents;
-    const action_group = continuation_contents.liveChatContinuation.actions;
-    this.enqueueActionGroup(action_group);
-
-    // Why don't we just emit the message directly? Well, enqueueing the messages is necessary so they are not emitted in a “messy” way, funny enough that's exactly how YouTube does it in its livechat js player.
-    this.message_queue.forEach((message, index) => {
-      if (this.id_cache.includes(message.id)) return;
-      setTimeout(() => this.emit('chat-update', message), message.timestamp / 1000 - new Date().getTime());
-      this.id_cache.push(message.id);
-    });
-
-    this.message_queue = [];
-
-    data = { context: this.session.context, videoId: this.video_id };
-    if (this.metadata_ctoken) data.continuation = this.metadata_ctoken;
-
-    const updated_metadata = await Axios.post(`${Constants.urls.YT_BASE_URL}/youtubei/v1/updated_metadata${this.session.logged_in && this.session.cookie.length < 1 ? '' : `?key=${this.session.key}`}`, JSON.stringify(data), Constants.innertube_request_opts({ session: this.session, data, desktop: true }));
-    if (updated_metadata instanceof Error) throw new Error(`Error polling updated metadata: ${updated_metadata.message}`);
-    this.metadata_ctoken = updated_metadata.data.continuation.timedContinuationData.continuation;
-
-    const metadata = updated_metadata.data.actions;
-    this.emit('update-metadata', {
-      likes: metadata[1].updateToggleButtonTextAction.defaultText.simpleText,
-      dislikes: metadata[2].updateToggleButtonTextAction.defaultText.simpleText,
-      view_count: {
-        simple_text: metadata[0].updateViewershipAction.viewCount.videoViewCountRenderer.viewCount.simpleText,
-        short_view_count: metadata[0].updateViewershipAction.viewCount.videoViewCountRenderer.extraShortViewCount.simpleText
-      }
-    });
-
-    this.livechat_poller = setTimeout(async () => await this.poll(), this.poll_intervals_ms);
-  }
-
   async sendMessage(text) {
     const message = await Actions.livechat(this.session, 'live_chat/send_message', { text, channel_id: this.channel_id, video_id: this.video_id });
     if (!message.success) return message;
@@ -104,7 +107,7 @@ class Livechat extends EventEmitter {
     return {
       success: true,
       status_code: message.status_code,
-      deleteMessage,
+      deleteMessage: deleteMessage,
       message_data: {
         text: message.data.actions[0].addChatItemAction.item.liveChatTextMessageRenderer.message.runs.map((item) => item.text).join(' '),
         author: {
@@ -118,8 +121,12 @@ class Livechat extends EventEmitter {
     };
   }
 
+  /**
+   * Blocks a user.
+   * @todo Implement this method.
+   * @param {object} msg_params 
+   */
   async blockUser(msg_params) {
-    /* TODO: Implement this */
     throw new Error('Not implemented');
   }
 

lib/core/OAuth.js

@@ -0,0 +1,199 @@
+'use strict';
+
+const Axios = require('axios');
+const Constants = require('../utils/Constants');
+const EventEmitter = require('events');
+const Uuid = require('uuid');
+
+class OAuth extends EventEmitter {
+  constructor(auth_info) {
+    super();
+    this.auth_info = auth_info;
+    this.refresh_interval = 5;
+
+    this.oauth_code_url = `${Constants.URLS.YT_BASE}/o/oauth2/device/code`;
+    this.oauth_token_url = `${Constants.URLS.YT_BASE}/o/oauth2/token`;
+
+    this.model_name = Constants.OAUTH.MODEL_NAME;
+    this.grant_type = Constants.OAUTH.GRANT_TYPE;
+    this.scope = Constants.OAUTH.SCOPE;
+
+    this.auth_script_regex = /<script id=\"base-js\" src=\"(.*?)\" nonce=".*?"><\/script>/;
+    this.identity_regex = /.+?={};var .+?={clientId:\"(?<id>.+?)\",.+?:\"(?<secret>.+?)\"},/;
+
+    if (auth_info.access_token) return;
+    this.#requestAuthCode();
+  }
+
+  /**
+   * Asks the OAuth server for an auth code.
+   * @returns {Promise.<void>}
+   */
+  async #requestAuthCode() {
+    const identity = await this.#getClientIdentity();
+
+    this.client_id = identity.id;
+    this.client_secret = identity.secret;
+
+    const data = {
+      client_id: this.client_id,
+      scope: this.scope,
+      device_id: Uuid.v4(),
+      model_name: this.model_name
+    };
+
+    const response = await Axios.post(this.oauth_code_url, JSON.stringify(data), Constants.OAUTH.HEADERS).catch((error) => error);
+
+    if (response instanceof Error)
+      return this.emit('auth', {
+        error: 'Could not get auth code.',
+        status: 'FAILED'
+      });
+
+    this.emit('auth', {
+      code: response.data.user_code,
+      status: 'AUTHORIZATION_PENDING',
+      expires_in: response.data.expires_in,
+      verification_url: response.data.verification_url
+    });
+
+    this.refresh_interval = response.data.interval;
+
+    this.#waitForAuth(response.data.device_code);
+  }
+
+  /**
+   * Waits for sign-in authorization.
+   *
+   * @param {string} device_code Client's device code.
+   * @returns 
+   */
+  #waitForAuth(device_code) {
+    const data = {
+      client_id: this.client_id,
+      client_secret: this.client_secret,
+      code: device_code,
+      grant_type: this.grant_type
+    };
+
+    setTimeout(async () => {
+      const response = await Axios.post(this.oauth_token_url, JSON.stringify(data), Constants.OAUTH.HEADERS).catch((error) => error);
+      if (response instanceof Error)
+        return this.emit('auth', {
+          error: 'Could not get authentication token.',
+          status: 'FAILED'
+        });
+
+      if (response.data.error) {
+        switch (response.data.error) {
+          case 'slow_down':
+          case 'authorization_pending':
+            this.#waitForAuth(device_code);
+            break;
+          case 'access_denied':
+            this.emit('auth', {
+              error: 'Access was denied.',
+              status: 'ACCESS_DENIED'
+            });
+            break;
+          case 'expired_token':
+            this.emit('auth', {
+              error: 'The device code has expired, requesting a new one.',
+              status: 'DEVICE_CODE_EXPIRED'
+            });
+            this.#requestAuthCode();
+            break;
+          default:
+        }
+      } else {
+        const expiration_date = new Date(new Date().getTime() + response.data.expires_in * 1000);
+
+        this.emit('auth', {
+          credentials: {
+            access_token: response.data.access_token,
+            refresh_token: response.data.refresh_token,
+            expires: expiration_date,
+          },
+          token_type: response.data.token_type,
+          status: 'SUCCESS'
+        });
+      }
+    }, 1000 * this.refresh_interval);
+  }
+
+  /**
+   * Gets a new access token using a refresh token.
+   * @returns {Promise.<{ credentials: { access_token: string; refresh_token: string; expires: Date }; status: string }>}
+   */
+  async refreshAccessToken() {
+    const identity = await this.#getClientIdentity();
+
+    const data = {
+      client_id: identity.id,
+      client_secret: identity.secret,
+      refresh_token: this.auth_info.refresh_token,
+      grant_type: 'refresh_token',
+    };
+
+    const response = await Axios.post(this.oauth_token_url, JSON.stringify(data), Constants.OAUTH.HEADERS).catch((error) => error);
+    if (response instanceof Error) {
+      this.emit('auth', {
+        error: 'Could not refresh access token.',
+        status: 'FAILED'
+      });
+
+      return {
+        credentials: {
+          access_token: this.auth_info.access_token,
+          refresh_token: this.auth_info.refresh_token,
+          expires: this.auth_info.expires
+        },
+        status: 'FAILED'
+      };
+    }
+
+    const expiration_date = new Date(new Date().getTime() + response.data.expires_in * 1000);
+
+    return {
+      credentials: {
+        refresh_token: this.auth_info.refresh_token,
+        access_token: response.data.access_token,
+        expires: expiration_date
+      },
+      token_type: response.data.token_type,
+      status: 'SUCCESS'
+    };
+  }
+
+  /**
+   * Gets client identity data.
+   * @returns {Promise.<{ id: string; secret: string }>} 
+   */
+  async #getClientIdentity() {
+    // This request is made to get the auth script url, hard-coding it isn't viable as it changes overtime.
+    const yttv_response = await Axios.get(`${Constants.URLS.YT_BASE}/tv`, Constants.OAUTH.HEADERS).catch((error) => error);
+    if (yttv_response instanceof Error) throw new Error(`Could not extract client identity: ${yttv_response.message}`);
+
+    // Here we download the script and extract the necessary data to proceed with the auth flow.
+    const url_body = this.auth_script_regex.exec(yttv_response.data)[1];
+    const script_url = `${Constants.URLS.YT_BASE}/${url_body}`;
+
+    const response = await Axios.get(script_url, Constants.DEFAULT_HEADERS).catch((error) => error);
+    if (response instanceof Error) throw new Error(`Could not extract client identity: ${response.message}`);
+
+    const client_identity = response.data.replace(/\n/g, '').match(this.identity_regex);
+    return client_identity.groups;
+  }
+
+  /**
+   * Checks access token validity.
+   * @returns {boolean} true | false
+   */
+  isTokenValid() {
+    const timestamp = new Date(this.auth_info.expires).getTime();
+    const is_valid = new Date().getTime() < timestamp;
+    return is_valid;
+  }
+}
+
+module.exports = OAuth;

lib/core/Player.js

@@ -0,0 +1,49 @@
+'use strict';
+
+const Fs = require('fs');
+const Axios = require('axios');
+const Utils = require('../utils/Utils');
+const Constants = require('../utils/Constants');
+
+class Player {
+  constructor(session) {
+    this.session = session;
+    this.player_name = Utils.getStringBetweenStrings(this.session.player_url, '/player/', '/');
+    this.tmp_cache_dir = __dirname.slice(0, -8) + 'cache';
+  }
+
+  async init() {
+    if (Fs.existsSync(`${this.tmp_cache_dir}/${this.player_name}.js`)) {
+      const player_data = Fs.readFileSync(`${this.tmp_cache_dir}/${this.player_name}.js`).toString();
+      this.sig_decipher_sc = this.#getSigDecipherCode(player_data);
+      this.ntoken_sc = this.#getNEncoder(player_data);
+    } else {
+      const response = await Axios.get(`${Constants.URLS.YT_BASE}${this.session.player_url}`, { path: this.session.playerUrl, headers: { 'content-type': 'text/javascript', 'user-agent': Utils.getRandomUserAgent('desktop').userAgent } }).catch((error) => error);
+      if (response instanceof Error) throw new Error('Could not download player script: ' + response.message);
+
+      try {
+        // Deletes old players
+        Fs.existsSync(this.tmp_cache_dir) && Fs.rmSync(this.tmp_cache_dir, { recursive: true });
+
+        // Caches the current player so we don't have to download it all the time.
+        Fs.mkdirSync(this.tmp_cache_dir, { recursive: true });
+        Fs.writeFileSync(`${this.tmp_cache_dir}/${this.player_name}.js`, response.data);
+      } catch (err) {}
+
+      this.sig_decipher_sc = this.#getSigDecipherCode(response.data);
+      this.ntoken_sc = this.#getNEncoder(response.data);
+    }
+  }
+
+  #getSigDecipherCode(data) {
+    const sig_alg_sc = Utils.getStringBetweenStrings(data, 'this.audioTracks};var', '};');
+    const sig_data = Utils.getStringBetweenStrings(data, 'function(a){a=a.split("")', 'return a.join("")}');
+    return sig_alg_sc + sig_data;
+  }
+
+  #getNEncoder(data) {
+    return `var b=a.split("")${Utils.getStringBetweenStrings(data, 'b=a.split("")', '}return b.join("")}')}} return b.join("");`;
+  }
+}
+
+module.exports = Player;

lib/deciphers/NToken.js

@@ -0,0 +1,139 @@
+'use strict';
+
+const Utils = require('../utils/Utils');
+const Constants = require('../utils/Constants');
+
+class NToken {
+  constructor(raw_code, n) {
+    this.n = n;
+    this.raw_code = raw_code;
+  }
+
+  /**
+   * Solves throttling challange by transforming the n token.
+   * @returns {string} transformed token.
+   */
+  transform() {
+    let n_token = this.n.split('');
+
+    try {
+      let transformations = this.#getTransformationData();
+      transformations = transformations.map((el) => {
+        if (el != null && typeof el != 'number') {
+          const is_reverse_base64 = el.includes('case 65:');
+          (({ // Identifies the transformation functions
+            [Constants.FUNCS.PUSH]: () => el = (arr, i) => this.#push(arr, i),
+            [Constants.FUNCS.SPLICE]: () => el = (arr, i) => this.#splice(arr, i),
+            [Constants.FUNCS.SWAP0_1]: () => el = (arr, i) => this.#swap0(arr, i),
+            [Constants.FUNCS.SWAP0_2]: () => el = (arr, i) => this.#swap0(arr, i),
+            [Constants.FUNCS.ROTATE_1]: () => el = (arr, i) => this.#rotate(arr, i),
+            [Constants.FUNCS.ROTATE_2]: () => el = (arr, i) => this.#rotate(arr, i),
+            [Constants.FUNCS.REVERSE_1]: () => el = (arr) => this.#reverse(arr),
+            [Constants.FUNCS.REVERSE_2]: () => el = (arr) => this.#reverse(arr),
+            [Constants.FUNCS.BASE64_DIA]: () => el = () => this.#getBase64Dia(is_reverse_base64),
+            [Constants.FUNCS.TRANSLATE_1]: () => el = (arr, token) => this.#translate1(arr, token, is_reverse_base64),
+            [Constants.FUNCS.TRANSLATE_2]: () => el = (arr, token, base64_dic) => this.#translate2(arr, token, base64_dic)
+          })[this.#getFunc(el)] || (() => el === 'b' && (el = n_token)))();
+        }
+        return el;
+      });
+
+      // Fills all placeholders with the transformations array
+      const placeholder_indexes = [...this.raw_code.matchAll(Constants.NTOKEN_REGEX.PLACEHOLDERS)].map((item) => parseInt(item[1]));
+      placeholder_indexes.forEach((i) => transformations[i] = transformations);
+
+      // Parses and emulates calls to the functions of the transformations array
+      const function_calls = [...Utils.getStringBetweenStrings(this.raw_code.replace(/\n/g, ''), 'try{', '}catch')
+        .matchAll(Constants.NTOKEN_REGEX.CALLS)].map((params) => ({ index: params[1], params: params[2] }));
+
+      function_calls.forEach((data) => {
+        const param_index = data.params.split(',').map((param) => param.match(/c\[(.*?)\]/)[1]);
+        const base64_dia = (param_index[2] && transformations[param_index[2]]());
+        transformations[data.index](transformations[param_index[0]], transformations[param_index[1]], base64_dia);
+      });
+    } catch (err) {
+      console.error(`Could not transform n-token (${this.n}), download may be throttled:`, err.message);
+      return this.n;
+    }
+    return n_token.join('');
+  }
+
+  #getFunc(el) {
+    return el.match(Constants.FUNCS_REGEX);
+  }
+
+  /**
+   * Takes the n-transform data, refines it, and then returns a readable json array.
+   * @returns {object}
+   */
+  #getTransformationData() {
+    const data = `[${Utils.getStringBetweenStrings(this.raw_code.replace(/\n/g, ''), 'c=[', '];c')}]`;
+    return JSON.parse(Utils.refineNTokenData(data));
+  }
+
+  /**
+   * Gets a base64 alphabet and uses it as a lookup table to modify n.
+   * @returns
+   */
+  #translate1(arr, token, is_reverse_base64) {
+    const characters = is_reverse_base64 && Constants.BASE64_DIALECT.REVERSE || Constants.BASE64_DIALECT.NORMAL;
+    arr.forEach(function(char, index, loc) {
+      this.push(loc[index] = characters[(characters.indexOf(char) - characters.indexOf(this[index]) + 64) % characters.length]);
+    }, token.split(''));
+  }
+
+  #translate2(arr, token, characters) {
+    let chars_length = characters.length;
+    arr.forEach(function(char, index, loc) {
+      this.push(loc[index] = characters[(characters.indexOf(char) - characters.indexOf(this[index]) + index + chars_length--) % characters.length]);
+    }, token.split(''));
+  }
+
+  /**
+   * Returns the requested base64 dialect, currently this is only used by 'translate2'.
+   * @returns {string[]}
+   */
+  #getBase64Dia(is_reverse_base64) {
+    const characters = is_reverse_base64 && Constants.BASE64_DIALECT.REVERSE || Constants.BASE64_DIALECT.NORMAL;
+    return characters;
+  }
+
+  /**
+   * Swaps the first element with the one at the given index.
+   * @returns
+   */
+  #swap0(arr, index) {
+    const old_elem = arr[0];
+    index = (index % arr.length + arr.length) % arr.length;
+    arr[0] = arr[index];
+    arr[index] = old_elem;
+  }
+
+  /**
+   * Rotates elements of the array.
+   * @returns
+   */
+  #rotate(arr, index) {
+    index = (index % arr.length + arr.length) % arr.length;
+    arr.splice(-index).reverse().forEach((el) => arr.unshift(el));
+  }
+
+  /**
+   * Deletes one element at the given index.
+   * @returns
+   */
+  #splice(arr, index) {
+    index = (index % arr.length + arr.length) % arr.length;
+    arr.splice(index, 1);
+  }
+
+  #reverse(arr) {
+    arr.reverse();
+  }
+
+  #push(arr, item) {
+    arr.push(item);
+  }
+}
+
+module.exports = NToken;

lib/deciphers/Sig.js

@@ -1,29 +1,30 @@
 'use strict';
 
-const NToken = require('./NToken');
 const QueryString = require('querystring');
 
 class SigDecipher {
-  constructor(url, cver, player) {
+  constructor(url, player) {
     this.url = url;
-    this.cver = cver;
     this.player = player;
     this.func_regex = /(.{2}):function\(.*?\){(.*?)}/g;
     this.actions_regex = /;.{2}\.(.{2})\(.*?,(.*?)\)/g;
   }
 
+  /**
+   * Deciphers signature.
+   */
   decipher() {
     const args = QueryString.parse(this.url);
-    const functions = this.getFunctions();
+    const functions = this.#getFunctions();
 
     function splice(arr, end) {
       arr.splice(0, end);
     }
 
-    function swap(arr, position) {
+    function swap(arr, index) {
       let origArrI = arr[0];
-      arr[0] = arr[position % arr.length];
-      arr[position % arr.length] = origArrI;
+      arr[0] = arr[index % arr.length];
+      arr[index % arr.length] = origArrI;
     }
 
     function reverse(arr) {
@@ -49,15 +50,11 @@ class SigDecipher {
     }
 
     const url_components = new URL(args.url);
-
-    args.sp !== undefined ? url_components.searchParams.set(args.sp, signature.join('')) : url_components.searchParams.set('signature', signature.join(''));
-    url_components.searchParams.set('cver', this.cver);
-    url_components.searchParams.set('ratebypass', 'yes');
-    url_components.searchParams.set('n', new NToken(this.player.ntoken_sc).transform(url_components.searchParams.get('n')));
+    args.sp ? url_components.searchParams.set(args.sp, signature.join('')) : url_components.searchParams.set('signature', signature.join(''));
     return url_components.toString();
   }
 
-  getFunctions() {
+  #getFunctions() {
     let func;
     let func_name = [];
 

lib/parser/index.js

@@ -0,0 +1,255 @@
+'use strict';
+
+const Utils = require('../utils/Utils');
+const Actions = require('../core/Actions');
+const Constants = require('../utils/Constants');
+const YTDataItems = require('./youtube');
+const YTMusicDataItems = require('./ytmusic');
+
+class Parser {
+  constructor(session, data, args = {}) {
+    this.session = session;
+    this.data = data;
+    this.args = args;
+  }
+
+  parse() {
+    const client = this.args.client;
+    const data_type = this.args.data_type
+
+    let processed_data;
+
+    switch (client) {
+      case 'YOUTUBE':
+        processed_data = ({
+          SEARCH: () => this.#processSearch(),
+          PLAYLIST: () => this.#processPlaylist(),
+          VIDEO_INFO: () => this.#processVideoInfo()
+        })[data_type]()
+        break;
+      case 'YTMUSIC':
+        processed_data = ({
+          SEARCH: () => this.#processMusicSearch(),
+          PLAYLIST: () => this.#processMusicPlaylist()
+        })[data_type]();
+        break;
+      default:
+        throw new Utils.InnertubeError('Invalid client');
+    }
+
+    return processed_data;
+  }
+
+  #processSearch() {
+    const contents = Utils.findNode(this.data, 'contents', 'contents', 5);
+
+    const processed_data = {};
+
+    const parseItems = (contents) => {
+      const content = contents[0].itemSectionRenderer.contents;
+
+      processed_data.query = content[0]?.showingResultsForRenderer?.originalQuery?.simpleText || this.args.query;
+      processed_data.corrected_query = content[0]?.showingResultsForRenderer?.correctedQueryEndpoint?.searchEndpoint?.query || 'N/A';
+      processed_data.estimated_results = parseInt(this.data.estimatedResults);
+
+      processed_data.videos = YTDataItems.VideoResultItem.parse(content);
+
+      processed_data.getContinuation = async () => {
+        const citem = contents.find((item) => item.continuationItemRenderer);
+        const ctoken = citem.continuationItemRenderer.continuationEndpoint.continuationCommand.token;
+
+        const response = await Actions.search(this.session, 'YOUTUBE', { ctoken });
+        if (!response.success) throw new Utils.InnertubeError('Could not get continuation', response);
+
+        const continuation_items = Utils.findNode(response.data, 'onResponseReceivedCommands', 'itemSectionRenderer', 4, false);
+        return parseItems(continuation_items);
+      };
+
+      return processed_data;
+    }
+
+    return parseItems(contents);
+  }
+
+  #processMusicSearch() {
+    const tabs = Utils.findNode(this.data, 'contents', 'tabs').tabs;
+    const contents = Utils.findNode(tabs, '0', 'contents', 5);
+
+    const did_you_mean_item = contents.find((content) => content.itemSectionRenderer);
+    const did_you_mean_renderer = did_you_mean_item?.itemSectionRenderer.contents[0].didYouMeanRenderer;
+
+    const processed_data = {
+      query: '',
+      corrected_query: '',
+      results: {}
+    };
+
+    processed_data.query = this.args.query;
+    processed_data.corrected_query = did_you_mean_renderer?.correctedQuery.runs.map((run) => run.text).join('') || 'N/A';
+
+    contents.forEach((content) => {
+      const section = content?.musicShelfRenderer;
+      if (section) {
+        const section_title = section.title.runs[0].text;
+
+        const section_items = ({
+          ['Top result']: () => YTMusicDataItems.TopResultItem.parse(section.contents), // console.log(JSON.stringify(section.contents, null, 4)),
+          ['Songs']: () => YTMusicDataItems.SongResultItem.parse(section.contents),
+          ['Videos']: () => YTMusicDataItems.VideoResultItem.parse(section.contents),
+          ['Featured playlists']: () => YTMusicDataItems.PlaylistResultItem.parse(section.contents),
+          ['Community playlists']: () => YTMusicDataItems.PlaylistResultItem.parse(section.contents),
+          ['Artists']: () => YTMusicDataItems.ArtistResultItem.parse(section.contents),
+          ['Albums']: () => YTMusicDataItems.AlbumResultItem.parse(section.contents)
+        })[section_title]();
+
+        processed_data.results[section_title.replace(/ /g, '_').toLowerCase()] = section_items;
+      }
+    });
+
+    return processed_data;
+  }
+
+  #processPlaylist() {
+    const details = this.data.sidebar.playlistSidebarRenderer.items[0];
+
+    const metadata = {
+      title: this.data.metadata.playlistMetadataRenderer.title,
+      description: details.playlistSidebarPrimaryInfoRenderer.description.simpleText || 'N/A',
+      total_items: details.playlistSidebarPrimaryInfoRenderer.stats[0].runs[0].text,
+      last_updated: details.playlistSidebarPrimaryInfoRenderer.stats[2].runs[1].text,
+      views: details.playlistSidebarPrimaryInfoRenderer.stats[1].simpleText
+    }
+
+    const list = Utils.findNode(this.data, 'contents', 'contents', 13, false);
+    const items = YTDataItems.PlaylistItem.parse(list.contents);
+
+    return {
+      ...metadata,
+      items
+    }
+  }
+
+  #processMusicPlaylist() {
+    const details = this.data.header.musicDetailHeaderRenderer;
+
+    const metadata = {
+      title: details?.title?.runs[0].text,
+      description: details?.description?.runs?.map((run) => run.text).join('') || 'N/A',
+      total_items: parseInt(details?.secondSubtitle?.runs[0].text.match(/\d+/g)),
+      duration: details?.secondSubtitle?.runs[2].text,
+      year: details?.subtitle?.runs[4].text
+    };
+
+    const contents = this.data.contents.singleColumnBrowseResultsRenderer.tabs[0].tabRenderer.content.sectionListRenderer.contents;
+    const playlist_content = contents[0].musicPlaylistShelfRenderer.contents;
+
+    const items = YTMusicDataItems.PlaylistItem.parse(playlist_content);
+
+    return {
+      ...metadata,
+      items
+    }
+  }
+
+  /**
+   * Video data is parsed dynamically, so if youtube decides to add something new we won't have to change anything here.
+   */
+  #processVideoInfo() {
+    const playability_status = this.data.playabilityStatus;
+
+    if (playability_status.status == 'ERROR')
+      throw new Error(`Could not retrieve video details: ${playability_status.status} - ${playability_status.reason}`);
+
+    const details = this.data.videoDetails;
+    const microformat = this.data.microformat.playerMicroformatRenderer;
+    const streaming_data = this.data.streamingData;
+
+    const mf_raw_data = Object.entries(microformat);
+    const dt_raw_data = Object.entries(details);
+
+    const processed_data = {
+      id: '',
+      title: '',
+      description: '',
+      thumbnail: [],
+      metadata: {}
+    };
+
+    // Extracts most of the metadata
+    mf_raw_data.forEach((entry) => {
+      const key = Utils.camelToSnake(entry[0]);
+      if (Constants.METADATA_KEYS.includes(key)) {
+        key == 'view_count' && (processed_data.metadata[key] = parseInt(entry[1])) ||
+          key == 'owner_profile_url' && (processed_data.metadata.channel_url = entry[1]) ||
+          key == 'owner_channel_name' && (processed_data.metadata.channel_name = entry[1]) ||
+          (processed_data.metadata[key] = entry[1]);
+      } else {
+        processed_data[key] = entry[1];
+      }
+    });
+
+    // Extracts extra details 
+    dt_raw_data.forEach((entry) => {
+      const key = Utils.camelToSnake(entry[0]);
+      if (Constants.BLACKLISTED_KEYS.includes(key)) return;
+      if (Constants.METADATA_KEYS.includes(key)) {
+        key == 'view_count' && (processed_data.metadata[key] = parseInt(entry[1])) ||
+          (processed_data.metadata[key] = entry[1]);
+      } else {
+        key == 'short_description' && (processed_data.description = entry[1]) ||
+          key == 'thumbnail' && (processed_data.thumbnail = entry[1].thumbnails.slice(-1)[0]) ||
+          key == 'video_id' && (processed_data.id = entry[1]) ||
+          (processed_data[key] = entry[1]);
+      }
+    });
+
+    // Data continuation is only required for getDetails()
+    if (this.data.continuation) {
+      const primary_info_renderer = this.data.continuation.contents.twoColumnWatchNextResults
+        .results.results.contents.find((item) => item.videoPrimaryInfoRenderer).videoPrimaryInfoRenderer;
+
+      const secondary_info_renderer = this.data.continuation.contents.twoColumnWatchNextResults
+        .results.results.contents.find((item) => item.videoSecondaryInfoRenderer).videoSecondaryInfoRenderer;
+
+      const like_btn = primary_info_renderer.videoActions.menuRenderer
+        .topLevelButtons.find((item) => item.toggleButtonRenderer.defaultIcon.iconType == 'LIKE');
+
+      const dislike_btn = primary_info_renderer.videoActions.menuRenderer
+        .topLevelButtons.find((item) => item.toggleButtonRenderer.defaultIcon.iconType == 'DISLIKE');
+
+      const notification_toggle_btn = secondary_info_renderer.subscribeButton.subscribeButtonRenderer
+        ?.notificationPreferenceButton?.subscriptionNotificationToggleButtonRenderer;
+
+      // These will always be false if logged out.
+      processed_data.metadata.is_liked = like_btn.toggleButtonRenderer.isToggled;
+      processed_data.metadata.is_disliked = dislike_btn.toggleButtonRenderer.isToggled;
+      processed_data.metadata.is_subscribed = secondary_info_renderer.subscribeButton.subscribeButtonRenderer?.subscribed || false;
+
+      processed_data.metadata.subscriber_count = secondary_info_renderer.owner.videoOwnerRenderer?.subscriberCountText?.simpleText || 'N/A';
+      processed_data.metadata.current_notification_preference = notification_toggle_btn?.states.find((state) => state.stateId == notification_toggle_btn.currentStateId)
+        .state.buttonRenderer.icon.iconType || 'N/A';
+
+      // Simpler version of publish_date
+      processed_data.metadata.publish_date_text = primary_info_renderer.dateText.simpleText;
+
+      // Only parse like count if it's enabled
+      if (processed_data.metadata.allow_ratings) {
+        processed_data.metadata.likes = {
+          count: parseInt(like_btn.toggleButtonRenderer.defaultText.accessibility.accessibilityData.label.replace(/\D/g, '')),
+          short_count_text: like_btn.toggleButtonRenderer.defaultText.simpleText
+        };
+      }
+
+      processed_data.metadata.owner_badges = secondary_info_renderer.owner.videoOwnerRenderer?.badges?.map((badge) => badge.metadataBadgeRenderer.tooltip) || [];
+    }
+
+    streaming_data && streaming_data.adaptiveFormats &&
+      (processed_data.metadata.available_qualities = [...new Set(streaming_data.adaptiveFormats.filter(v => v.qualityLabel)
+        .map(v => v.qualityLabel).sort((a, b) => +a.replace(/\D/gi, '') - +b.replace(/\D/gi, '')))]) ||
+      (processed_data.metadata.available_qualities = []);
+
+    return processed_data;
+  }
+}
+
+module.exports = Parser;

lib/parser/youtube/index.js

@@ -0,0 +1,6 @@
+'use strict';
+
+const VideoResultItem = require('./search/VideoResultItem');
+const PlaylistItem = require('./others/PlaylistItem');
+
+module.exports = { VideoResultItem, PlaylistItem };

lib/parser/youtube/others/PlaylistItem.js

@@ -0,0 +1,26 @@
+'use strict';
+
+const Utils = require('../../../utils/Utils');
+
+class PlaylistItem {
+  static parse(data) {
+    return data.map((item) => this.parseItem(item)).filter((item) => item); 
+  }
+  
+  static parseItem(item) {
+    if (item.playlistVideoRenderer)
+      return {
+        id: item?.playlistVideoRenderer?.videoId,
+        title: item?.playlistVideoRenderer?.title?.runs[0]?.text,
+        author: item?.playlistVideoRenderer?.shortBylineText?.runs[0]?.text,
+        duration: {
+          seconds: Utils.timeToSeconds(item?.playlistVideoRenderer?.lengthText?.simpleText || '0'),
+          simple_text: item?.playlistVideoRenderer?.lengthText?.simpleText || 'N/A',
+          accessibility_label: item?.playlistVideoRenderer?.lengthText?.accessibility?.accessibilityData?.label || 'N/A'
+        },
+        thumbnails: item?.playlistVideoRenderer?.thumbnail?.thumbnails,
+      };
+  }
+}
+
+module.exports = PlaylistItem;

lib/parser/youtube/search/VideoResultItem.js

@@ -0,0 +1,43 @@
+'use strict';
+
+const Utils = require('../../../utils/Utils');
+const Constants = require('../../../utils/Constants');
+
+class VideoResultItem {
+  static parse(data) {
+    return data.map((item) => this.parseItem(item)).filter((item) => item); 
+  }
+  
+  static parseItem(item) {
+    const renderer = item.videoRenderer || item.compactVideoRenderer;
+    if (renderer) return {
+      id: renderer.videoId,
+      url: `https://youtu.be/${renderer.videoId}`,
+      title: renderer.title.runs[0].text,
+      description: renderer?.detailedMetadataSnippets && renderer?.detailedMetadataSnippets[0].snippetText.runs.map((item) => item.text).join('') || 'N/A',
+      channel: {
+        id: renderer?.ownerText?.runs[0]?.navigationEndpoint?.browseEndpoint?.browseId,
+        name: renderer?.ownerText?.runs[0]?.text,
+        url: `${Constants.URLS.YT_BASE}${renderer.ownerText.runs[0].navigationEndpoint?.browseEndpoint?.canonicalBaseUrl}`
+      },
+      metadata: {
+        view_count: renderer?.viewCountText?.simpleText || 'N/A',
+        short_view_count_text: {
+          simple_text: renderer?.shortViewCountText?.simpleText || 'N/A',
+          accessibility_label: renderer?.shortViewCountText?.accessibility?.accessibilityData?.label || 'N/A',
+        },
+        thumbnails: renderer?.thumbnail.thumbnails,
+        duration: {
+          seconds: Utils.timeToSeconds(renderer?.lengthText?.simpleText || '0'),
+          simple_text: renderer?.lengthText?.simpleText || 'N/A',
+          accessibility_label: renderer?.lengthText?.accessibility?.accessibilityData?.label || 'N/A'
+        },
+        published: renderer?.publishedTimeText?.simpleText || 'N/A',
+        badges: renderer?.badges?.map((item) => item.metadataBadgeRenderer.label) || [],
+        owner_badges: renderer?.ownerBadges?.map((item) => item.metadataBadgeRenderer.tooltip) || []
+      }
+    };
+  }
+}
+
+module.exports = VideoResultItem;

lib/parser/ytmusic/index.js

@@ -0,0 +1,11 @@
+'use strict';
+
+const SongResultItem = require('./search/SongResultItem');
+const VideoResultItem = require('./search/VideoResultItem');
+const AlbumResultItem = require('./search/AlbumResultItem');
+const ArtistResultItem = require('./search/ArtistResultItem');
+const PlaylistResultItem = require('./search/PlaylistResultItem');
+const TopResultItem = require('./search/TopResultItem');
+const PlaylistItem = require('./others/PlaylistItem');
+
+module.exports = { SongResultItem, VideoResultItem, AlbumResultItem, ArtistResultItem, PlaylistResultItem, TopResultItem, PlaylistItem };

lib/parser/ytmusic/others/PlaylistItem.js

@@ -0,0 +1,28 @@
+'use strict';
+
+const Utils = require('../../../utils/Utils');
+
+class PlaylistItem {
+  static parse(data) {
+    return data.map((item) => this.parseItem(item)).filter((item) => item.id); 
+  }
+  
+  static parseItem(item) {
+    const item_renderer = item.musicResponsiveListItemRenderer;
+    const fixed_columns = item_renderer.fixedColumns;
+    const flex_columns = item_renderer.flexColumns;
+
+    return {
+      id: item_renderer.playlistItemData && item_renderer.playlistItemData.videoId,
+      title: flex_columns[0].musicResponsiveListItemFlexColumnRenderer.text.runs[0].text,
+      author: flex_columns[1].musicResponsiveListItemFlexColumnRenderer.text.runs[0].text,
+      duration: {
+        seconds: Utils.timeToSeconds(fixed_columns[0].musicResponsiveListItemFixedColumnRenderer.text.runs[0].text || '0'),
+        simple_text: fixed_columns[0].musicResponsiveListItemFixedColumnRenderer.text.runs[0].text,
+      },
+      thumbnails: item_renderer.thumbnail.musicThumbnailRenderer.thumbnail.thumbnails
+    }
+  }
+}
+
+module.exports = PlaylistItem;

lib/parser/ytmusic/search/AlbumResultItem.js

@@ -0,0 +1,21 @@
+'use strict';
+
+class AlbumResultItem {
+  static parse(data) {
+    return data.map((item) => this.parseItem(item));
+  }
+  
+  static parseItem(item) {
+    const list_item = item.musicResponsiveListItemRenderer;
+    return {
+      id: list_item.navigationEndpoint.browseEndpoint.browseId,
+      title: list_item.flexColumns[0]?.musicResponsiveListItemFlexColumnRenderer.text.runs[0]?.text,
+      author: list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs[2]?.text,
+      year: list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs
+      .find((run) => /^[12][0-9]{3}$/.test(run.text)).text,
+      thumbnails: list_item?.thumbnail.musicThumbnailRenderer.thumbnail.thumbnails,
+    };
+  }
+}
+
+module.exports = AlbumResultItem;

lib/parser/ytmusic/search/ArtistResultItem.js

@@ -0,0 +1,19 @@
+'use strict';
+
+class ArtistResultItem {
+  static parse(data) {
+    return data.map((item) => this.parseItem(item));
+  }
+
+  static parseItem(item) {
+    const list_item = item.musicResponsiveListItemRenderer;
+    return {
+      id: list_item.navigationEndpoint.browseEndpoint.browseId,
+      name: list_item.flexColumns[0]?.musicResponsiveListItemFlexColumnRenderer.text.runs[0]?.text,
+      subscribers: list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs[2]?.text,
+      thumbnails: list_item?.thumbnail.musicThumbnailRenderer.thumbnail.thumbnails,
+    };
+  }
+}
+
+module.exports = ArtistResultItem;

lib/parser/ytmusic/search/PlaylistResultItem.js

@@ -0,0 +1,23 @@
+'use strict';
+
+class PlaylistResultItem {
+  static parse(data) {
+    return data.map((item) => this.parseItem(item));
+  }
+
+  static parseItem(item) {
+    const list_item = item.musicResponsiveListItemRenderer;
+    const watch_playlist_endpoint = list_item.overlay.musicItemThumbnailOverlayRenderer
+    .content.musicPlayButtonRenderer.playNavigationEndpoint.watchPlaylistEndpoint;
+
+    return {
+      id: watch_playlist_endpoint?.playlistId,
+      title: list_item.flexColumns[0]?.musicResponsiveListItemFlexColumnRenderer.text.runs[0]?.text,
+      author: list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs[2]?.text,
+      channel_id: list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs[2]?.navigationEndpoint?.browseEndpoint.browseId || '0',
+      total_items: parseInt(list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs[4]?.text.match(/\d+/g)),
+    };
+  }
+}
+
+module.exports = PlaylistResultItem;

lib/parser/ytmusic/search/SongResultItem.js

@@ -0,0 +1,22 @@
+'use strict';
+
+class SongResultItem {
+  static parse(data) {
+    return data.map((item) => this.parseItem(item)).filter((item) => item);
+  }
+
+  static parseItem(item) {
+    const list_item = item.musicResponsiveListItemRenderer;
+    if (list_item.playlistItemData) return {
+      id: list_item.playlistItemData.videoId,
+      title: list_item.flexColumns[0]?.musicResponsiveListItemFlexColumnRenderer.text.runs[0]?.text,
+      artist: list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs[2]?.text,
+      album: list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs[4]?.text,
+      duration: list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs
+      .find((run) => /^\d+$/.test(run.text.replace(/:/g, ''))).text,
+      thumbnails: list_item.thumbnail.musicThumbnailRenderer.thumbnail.thumbnails,
+    };
+  }
+}
+
+module.exports = SongResultItem;

lib/parser/ytmusic/search/TopResultItem.js

@@ -0,0 +1,32 @@
+'use strict';
+
+const SongResultItem = require('./SongResultItem');
+const VideoResultItem = require('./VideoResultItem');
+const AlbumResultItem = require('./AlbumResultItem');
+const ArtistResultItem = require('./ArtistResultItem');
+const PlaylistResultItem = require('./PlaylistResultItem');
+
+class TopResultItem {
+  static parse(data) {
+    return data.map((item) => {
+      const list_item = item.musicResponsiveListItemRenderer;
+
+      const runs = list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs;
+      const type = runs[0].text.toLowerCase();
+
+      const parsed_item = ({
+        playlist: () => PlaylistResultItem.parseItem(item),
+        song: () => SongResultItem.parseItem(item),
+        video: () => VideoResultItem.parseItem(item),
+        artist: () => ArtistResultItem.parseItem(item),
+        album: () => ArtistResultItem.parseItem(item)
+      }[type])();
+      
+      parsed_item.type = type;
+      
+      return parsed_item;
+    }).filter((item) => item);
+  }
+}
+
+module.exports = TopResultItem;

lib/parser/ytmusic/search/VideoResultItem.js

@@ -0,0 +1,22 @@
+'use strict';
+
+class VideoResultItem {
+  static parse(data) {
+    return data.map((item) => this.parseItem(item)).filter((item) => item); 
+  }
+  
+  static parseItem(item) {
+    const list_item = item.musicResponsiveListItemRenderer;
+    if (list_item.playlistItemData) return {
+      id: list_item.playlistItemData.videoId,
+      title: list_item.flexColumns[0]?.musicResponsiveListItemFlexColumnRenderer.text.runs[0]?.text,
+      author: list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs[2]?.text,
+      views: list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs[4]?.text,
+      duration: list_item.flexColumns[1]?.musicResponsiveListItemFlexColumnRenderer.text.runs
+      .find((run) => /^\d+$/.test(run.text.replace(/:/g, ''))).text,
+      thumbnails: list_item?.thumbnail.musicThumbnailRenderer.thumbnail.thumbnails,
+    };
+  }
+}
+
+module.exports = VideoResultItem;

lib/proto/index.js

@@ -0,0 +1,133 @@
+'use strict';
+
+const Fs = require('fs');
+const Proto = require('protons');
+
+/**
+ *  Encodes advanced search filters.
+ *
+ * @param {string} period - Period in which a video is uploaded: any | hour | day | week | month | year
+ * @param {string} duration - The duration of a video: any | short | long
+ * @param {string} order - The order of the search results: relevance | rating | age | views
+ * @returns {string}
+ */
+function encodeSearchFilter(period, duration, order) {
+  const youtube_proto = Proto(Fs.readFileSync(`${__dirname}/youtube.proto`));
+
+  const periods = { 'any': null, 'hour': 1, 'day': 2, 'week': 3, 'month': 4, 'year': 5 };
+  const durations = { 'any': null, 'short': 1, 'long': 2 };
+  const orders = { 'relevance': null, 'rating': 1, 'age': 2, 'views': 3 };
+
+  const search_filter_buff = youtube_proto.SearchFilter.encode({
+    number: orders[order],
+    filter: {
+      param_0: periods[period],
+      param_1: (period == 'hour' && order == 'relevance') ? null : 1,
+      param_2: durations[duration]
+    }
+  });
+
+  return encodeURIComponent(Buffer.from(search_filter_buff).toString('base64'));
+}
+
+/**
+ * Encodes livestream message parameters.
+ *
+ * @param {string} channel_id - The id of the channel hosting the livestream.
+ * @param {string} video_id - The id of the livestream.
+ * @returns {string}
+ */
+function encodeMessageParams(channel_id, video_id) {
+  const youtube_proto = Proto(Fs.readFileSync(`${__dirname}/youtube.proto`));
+
+  const buf = youtube_proto.LiveMessageParams.encode({
+    params: {
+      ids: { channel_id, video_id }
+    },
+    number_0: 1,
+    number_1: 4
+  });
+
+  return Buffer.from(encodeURIComponent(Buffer.from(buf).toString('base64'))).toString('base64');
+}
+
+/**
+ * Encodes comment parameters.
+ *
+ * @param {string} video_id - The id of the video you're commenting on.
+ * @returns {string}
+ */
+function encodeCommentParams(video_id) {
+  const youtube_proto = Proto(Fs.readFileSync(`${__dirname}/youtube.proto`));
+
+  const buf = youtube_proto.CreateCommentParams.encode({
+    video_id,
+    params: { index: 0 },
+    number: 7
+  });
+
+  return encodeURIComponent(Buffer.from(buf).toString('base64'));
+}
+
+/**
+ * Encodes comment reply parameters.
+ *
+ * @param {string} comment_id - The id of the comment.
+ * @param {string} video_id - The id of the video you're commenting on.
+ * @returns {string}
+ */
+function encodeCommentReplyParams(comment_id, video_id) {
+  const youtube_proto = Proto(Fs.readFileSync(`${__dirname}/youtube.proto`));
+
+  const buf = youtube_proto.CreateCommentReplyParams.encode({
+    video_id, comment_id,
+    params: { unk_num: 0 },
+    unk_num: 7
+  });
+
+  return encodeURIComponent(Buffer.from(buf).toString('base64'));
+}
+
+/**
+ * Encodes comment action parameters (liking, disliking, reporting a comment etc).
+ *
+ * @param {string} type - Type of action.
+ * @param {string} comment_id - The id of the comment.
+ * @param {string} video_id - The id of the video you're commenting on.
+ * @param {string} channel_id - The id of the channel.
+ * @returns {string}
+ */
+function encodeCommentActionParams(type, comment_id, video_id, channel_id) {
+  const youtube_proto = Proto(Fs.readFileSync(`${__dirname}/youtube.proto`));
+  
+  const buf = youtube_proto.PeformCommentActionParams.encode({
+    type, comment_id, channel_id, video_id,
+    unk_num: 2, unk_num_1: 0, unk_num_2: 0,
+    unk_num_3: "0", unk_num_4: 0,
+    unk_num_5: 12, unk_num_6: 0,
+  });
+
+  return encodeURIComponent(Buffer.from(buf).toString('base64'));
+}
+
+/**
+ * Encodes notification preferences.
+ *
+ * @param {string} channel_id - The id of the channel.
+ * @param {string} index - The index of the preference id.
+ * @returns {string}
+ */
+function encodeNotificationPref(channel_id, index) {
+  const youtube_proto = Proto(Fs.readFileSync(`${__dirname}/youtube.proto`));
+
+  const buf = youtube_proto.NotificationPreferences.encode({
+    channel_id,
+    pref_id: { index },
+    number_0: 0,
+    number_1: 4
+  });
+
+  return encodeURIComponent(Buffer.from(buf).toString('base64'));
+}
+
+module.exports = { encodeMessageParams, encodeCommentParams, encodeCommentReplyParams, encodeCommentActionParams, encodeNotificationPref, encodeSearchFilter };

lib/proto/youtube.proto

@@ -1,34 +1,75 @@
-syntax = "proto2";
-package proto;
-
-message NotificationPreferences {
-  string channel_id = 1;
-  message Preference {
-    int32 index = 1;
-  }
-  Preference pref_id = 2;
-  int32 number_0 = 3;
-  int32 number_1 = 4;
-}
-
-message LiveMessageParams {
-  message Params {
-    message Ids {
-      string channel_id = 1;
-      string video_id = 2;
-    }
-    Ids ids = 5;
-  }
-  Params params = 1;
-  int32 number_0 = 2;
-  int32 number_1 = 3;
-}
-
-message CreateCommentParams {
-  string video_id = 2;
-  message Params {
-    int32 index = 1;
-  }
-  Params params = 5;
-  int32 number = 10;
+syntax = "proto2";
+package proto;
+
+message NotificationPreferences {
+  string channel_id = 1;
+  message Preference {
+    int32 index = 1;
+  }
+  Preference pref_id = 2;
+  int32 number_0 = 3;
+  int32 number_1 = 4;
+}
+
+message LiveMessageParams {
+  message Params {
+    message Ids {
+      string channel_id = 1;
+      string video_id = 2;
+    }
+    Ids ids = 5;
+  }
+  Params params = 1;
+  int32 number_0 = 2;
+  int32 number_1 = 3;
+}
+
+message CreateCommentParams {
+  string video_id = 2;
+  message Params {
+    int32 index = 1;
+  }
+  Params params = 5;
+  int32 number = 10;
+}
+
+message CreateCommentReplyParams {
+  string video_id = 2;
+  string comment_id = 4;
+ 
+  message UnknownParams {
+    int32 unk_num = 1;
+  }
+  UnknownParams params = 5;
+  
+  int32 unk_num = 10;
+}
+
+message PeformCommentActionParams {
+  int32 type = 1;
+  int32 unk_num = 2;
+  
+  string comment_id = 3;
+  string video_id = 5;
+  
+  int32 unk_num_1 = 6;
+  int32 unk_num_2 = 7;
+  
+  string unk_num_3 = 9;
+  
+  int32 unk_num_4 = 10;
+  int32 unk_num_5 = 21;
+  
+  string channel_id = 23;
+  int32 unk_num_6 = 30;
+}
+
+message SearchFilter {
+  int32 number = 1;
+  message Filter {
+    int32 param_0 = 1;
+    int32 param_1 = 2;
+    int32 param_2 = 3;
+  }
+  Filter filter = 2;
 }

lib/utils/Constants.js

@@ -0,0 +1,141 @@
+'use strict';
+
+const Utils = require('./Utils');
+
+module.exports = {
+  URLS: {
+    YT_BASE: 'https://www.youtube.com',
+    YT_BASE_API: 'https://www.youtube.com/youtubei/',
+    YT_SUGGESTIONS: 'https://suggestqueries.google.com/complete/',
+    YT_MUSIC: 'https://music.youtube.com',
+    YT_MUSIC_BASE_API: 'https://music.youtube.com/youtubei/'
+  },
+  OAUTH: {
+    SCOPE: 'http://gdata.youtube.com https://www.googleapis.com/auth/youtube-paid-content',
+    GRANT_TYPE: 'http://oauth.net/grant_type/device/1.0',
+    MODEL_NAME: 'ytlr::',
+    HEADERS: {
+      headers: {
+        'accept': '*/*',
+        'origin': 'https://www.youtube.com',
+        'user-agent': 'Mozilla/5.0 (ChromiumStylePlatform) Cobalt/Version',
+        'content-type': 'application/json',
+        'referer': `https://www.youtube.com/tv`,
+        'accept-language': 'en-US'
+      }
+    }
+  },
+  DEFAULT_HEADERS: (session) => {
+    return {
+      headers: {
+        'Cookie': session.cookie,
+        'user-agent': Utils.getRandomUserAgent('desktop').userAgent,
+        'Referer': 'https://www.google.com/',
+        'Accept': 'text/html',
+        'Accept-Language': 'en-US,en',
+        'Accept-Encoding': 'gzip'
+      }
+    };
+  },
+  STREAM_HEADERS: {
+    'Accept': '*/*',
+    'User-Agent': Utils.getRandomUserAgent('desktop').userAgent,
+    'Connection': 'keep-alive',
+    'Origin': 'https://www.youtube.com',
+    'Referer': 'https://www.youtube.com',
+    'DNT': '?1'
+  },
+  INNERTUBE_HEADERS: (info) => {
+    const origin = info.ytmusic && 'https://music.youtube.com' || 'https://www.youtube.com';
+
+    const headers = {
+      'accept': '*/*',
+      'user-agent': Utils.getRandomUserAgent('desktop').userAgent,
+      'content-type': 'application/json',
+      'accept-language': 'en-US,en;q=0.9',
+      'x-goog-authuser': 0,
+      'x-goog-visitor-id': info.session.context.client.visitorData || '',
+      'x-youtube-client-name': 1,
+      'x-youtube-client-version': info.session.context.client.clientVersion,
+      'x-youtube-chrome-connected': 'source=Chrome,mode=0,enable_account_consistency=true,supervised=false,consistency_enabled_by_default=false',
+      'x-origin': origin,
+      'origin': origin
+    };
+
+    if (info.session.logged_in) {
+
+      headers.Cookie = info.session.cookie;
+      headers.authorization = info.session.cookie.length && info.session.auth_apisid || `Bearer ${info.session.access_token}`;
+    }
+
+    return headers
+  },
+  VIDEO_INFO_REQBODY: (id, sts, context) => {
+    return {
+      playbackContext: {
+        contentPlaybackContext: {
+          'currentUrl': '/watch?v=' + id,
+          'vis': 0,
+          'splay': false,
+          'autoCaptionsDefaultOn': false,
+          'autonavState': 'STATE_OFF',
+          'html5Preference': 'HTML5_PREF_WANTS',
+          'signatureTimestamp': sts,
+          'referer': 'https://www.youtube.com',
+          'lactMilliseconds': '-1'
+        }
+      },
+      context: context,
+      videoId: id
+    };
+  },
+  YTMUSIC_VERSION: '1.20211213.00.00',
+  METADATA_KEYS: [
+    'embed', 'view_count', 'average_rating', 'allow_ratings',
+    'length_seconds', 'channel_id', 'channel_url',
+    'external_channel_id', 'is_live_content', 'is_family_safe',
+    'is_unlisted', 'is_private', 'has_ypc_metadata',
+    'category', 'owner_channel_name', 'publish_date',
+    'upload_date', 'keywords', 'available_countries',
+    'owner_profile_url'
+  ],
+  BLACKLISTED_KEYS: [
+    'is_owner_viewing', 'is_unplugged_corpus',
+    'is_crawlable', 'author'
+  ],
+  ACCOUNT_SETTINGS: {
+    // Notifications
+    SUBSCRIPTIONS: 'NOTIFICATION_SUBSCRIPTION_NOTIFICATIONS',
+    RECOMMENDED_VIDEOS: 'NOTIFICATION_RECOMMENDATION_WEB_CONTROL',
+    CHANNEL_ACTIVITY: 'NOTIFICATION_COMMENT_WEB_CONTROL',
+    COMMENT_REPLIES: 'NOTIFICATION_COMMENT_REPLY_OTHER_WEB_CONTROL',
+    USER_MENTION: 'NOTIFICATION_USER_MENTION_WEB_CONTROL',
+    SHARED_CONTENT: 'NOTIFICATION_RETUBING_WEB_CONTROL',
+
+    // Privacy 
+    PLAYLISTS_PRIVACY: 'PRIVACY_DISCOVERABLE_SAVED_PLAYLISTS',
+    SUBSCRIPTIONS_PRIVACY: 'PRIVACY_DISCOVERABLE_SUBSCRIPTIONS'
+  },
+  BASE64_DIALECT: {
+    NORMAL: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_'.split(''),
+    REVERSE: '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_'.split('')
+  },
+  NTOKEN_REGEX: {
+    CALLS: /c\[(.*?)\]\((.+?)\)/g,
+    PLACEHOLDERS: /c\[(.*?)\]=c/g,
+  },
+  FUNCS_REGEX: /d\.push\(e\)|d\.reverse\(\)|d\[0\]\)\[0\]\)|f=d\[0];d\[0\]|d\.length;d\.splice\(e,1\)|function\(\){for\(var|function\(d,e,f\){var|function\(d\){for\(var|reverse\(\)\.forEach|unshift\(d\.pop\(\)\)|function\(d,e\){for\(var f/,
+  FUNCS: {
+    PUSH: 'd.push(e)',
+    REVERSE_1: 'd.reverse()',
+    REVERSE_2: 'function(d){for(var',
+    SPLICE: 'd.length;d.splice(e,1)',
+    SWAP0_1: 'd[0])[0])',
+    SWAP0_2: 'f=d[0];d[0]',
+    ROTATE_1: 'reverse().forEach',
+    ROTATE_2: 'unshift(d.pop())',
+    BASE64_DIA: 'function(){for(var',
+    TRANSLATE_1: 'function(d,e){for(var f',
+    TRANSLATE_2: 'function(d,e,f){var'
+  }
+};

lib/utils/Utils.js

@@ -0,0 +1,133 @@
+'use strict';
+
+const Fs = require('fs');
+const Crypto = require('crypto');
+const UserAgent = require('user-agents');
+const Flatten = require('flat');
+
+function InnertubeError(message, info) {
+  this.info = info;
+  this.stack = Error(message).stack;
+}
+
+InnertubeError.prototype = Object.create(Error.prototype);
+InnertubeError.prototype.constructor = InnertubeError;
+
+class ParsingError extends InnertubeError {};
+class DownloadError extends InnertubeError {};
+class MissingParamError extends InnertubeError {};
+class UnavailableContentError extends InnertubeError {};
+class NoStreamingDataError extends InnertubeError {};
+
+/**
+ * Utility to help access deep properties of an object.
+ * 
+ * @param {object} obj - The object.
+ * @param {string} key - Key of the property being accessed.
+ * @param {string} target - Anything that might be inside of the property.
+ * @param {number} depth - Maximum number of nested objects to flatten.
+ * @param {boolean} safe - If set to true arrays will be preserved.
+ */
+function findNode(obj, key, target, depth, safe = true) {
+  const flat_obj = Flatten(obj, { safe, maxDepth: depth || 2 });
+  const result = Object.keys(flat_obj).find((entry) => entry.includes(key) && JSON.stringify(flat_obj[entry] || '{}').includes(target));
+  if (!result) throw new ParsingError(`Expected to find "${key}" with content "${target}" but got ${result}`, { key, target, data_snippet: `${JSON.stringify(flat_obj).slice(0, 300)}..` });
+  return flat_obj[result];
+}
+
+/**
+ * Gets a string between two delimiters.
+ *
+ * @param {string} data - The data.
+ * @param {string} start_string - Start string.
+ * @param {string} end_string - End string.
+ */
+function getStringBetweenStrings(data, start_string, end_string) {
+  const regex = new RegExp(`${escapeStringRegexp(start_string)}(.*?)${escapeStringRegexp(end_string)}`, 's');
+  const match = data.match(regex);
+  return match ? match[1] : undefined;
+}
+
+function escapeStringRegexp(string) {
+  return string.replace(/[|\\{}()[\]^$+*?.]/g, "\\$&").replace(/-/g, "\\x2d");
+}
+
+/**
+ * Returns a random user agent.
+ *
+ * @param {string} type - mobile | desktop
+ * @returns {object}
+ */
+function getRandomUserAgent(type) {
+  switch (type) {
+    case 'mobile':
+      return new UserAgent(/Android/).data;
+    case 'desktop':
+      return new UserAgent({ deviceCategory: 'desktop' }).data;
+    default:
+  }
+}
+
+/**
+ * Generates an authentication token from a cookies' sid.
+ *
+ * @param {string} sid - Sid extracted from cookies 
+ * @returns {string}
+ */
+function generateSidAuth(sid) {
+  const youtube = 'https://www.youtube.com';
+  const timestamp = Math.floor(new Date().getTime() / 1000);
+  const input = [timestamp, sid, youtube].join(' ');
+
+  let hash = Crypto.createHash('sha1');
+  let data = hash.update(input, 'utf-8');
+  let gen_hash = data.digest('hex');
+
+  return ['SAPISIDHASH', [timestamp, gen_hash].join('_')].join(' ');
+}
+
+/**
+ * Converts time (h:m:s) to seconds.
+ * 
+ * @param {string} time 
+ * @returns {number} seconds
+ */
+function timeToSeconds(time) {
+  let params = time.split(':');
+  return parseInt(({
+    3: +params[0] * 3600 + +params[1] * 60 + +params[2],
+    2: +params[0] * 60 + +params[1],
+    1: +params[0]
+  })[params.length]);
+}
+
+/**
+ * Converts strings in camelCase to snake_case.
+ *
+ * @param {string} string The string in camelCase.
+ * @returns {string}
+ */
+function camelToSnake(string) {
+  return string[0].toLowerCase() + string.slice(1, string.length).replace(/[A-Z]/g, (letter) => `_${letter.toLowerCase()}`);
+}
+
+/**
+ * Turns the ntoken transform data into a valid json array
+ * 
+ * @param {string} data 
+ * @returns {string}
+ */
+function refineNTokenData(data) {
+  return data
+    .replace(/function\(d,e\)/g, '"function(d,e)').replace(/function\(d\)/g, '"function(d)')
+    .replace(/function\(\)/g, '"function()').replace(/function\(d,e,f\)/g, '"function(d,e,f)')
+    .replace(/\[function\(d,e,f\)/g, '["function(d,e,f)').replace(/,b,/g, ',"b",')
+    .replace(/,b/g, ',"b"').replace(/b,/g, '"b",').replace(/b]/g, '"b"]')
+    .replace(/\[b/g, '["b"').replace(/}]/g, '"]').replace(/},/g, '}",')
+    .replace(/""/g, '').replace(/length]\)}"/g, 'length])}');
+}
+
+const errors = { UnavailableContentError, ParsingError, DownloadError, InnertubeError, MissingParamError, NoStreamingDataError };
+const functions = { findNode, getRandomUserAgent, generateSidAuth, getStringBetweenStrings, camelToSnake, timeToSeconds, refineNTokenData };
+
+module.exports = { ...functions, ...errors };

package-lock.json

@@ -1,19 +1,25 @@
 {
   "name": "youtubei.js",
-  "version": "1.2.2",
+  "version": "1.4.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "youtubei.js",
-      "version": "1.2.2",
+      "version": "1.4.0",
       "license": "MIT",
       "dependencies": {
         "axios": "^0.21.4",
+        "flat": "^5.0.2",
         "protons": "^2.0.3",
-        "time-to-seconds": "^1.1.5",
         "user-agents": "^1.0.778",
         "uuid": "^8.3.2"
+      },
+      "engines": {
+        "node": ">=14"
+      },
+      "funding": {
+        "url": "https://ko-fi.com/luanrt"
       }
     },
     "node_modules/axios": {
@@ -53,10 +59,18 @@
         "dot-json": "bin/dot-json.js"
       }
     },
+    "node_modules/flat": {
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/flat/-/flat-5.0.2.tgz",
+      "integrity": "sha512-b6suED+5/3rTpUBdG1gupIl8MPFCAMA0QXwmljLhvCUKcUvdE4gWky9zpuGCcXHOsz4J9wPGNWq6OKpmIzz3hQ==",
+      "bin": {
+        "flat": "cli.js"
+      }
+    },
     "node_modules/follow-redirects": {
-      "version": "1.14.4",
-      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.14.4.tgz",
-      "integrity": "sha512-zwGkiSXC1MUJG/qmeIFH2HBJx9u0V46QGUe3YR1fXG8bXQxq7fLj0RjLZQ5nubr9qNJUZrH+xUcwXEoXNpfS+g==",
+      "version": "1.14.9",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.14.9.tgz",
+      "integrity": "sha512-MQDfihBQYMcyy5dhRDJUHcw7lb2Pv/TuE6xP1vyraLukNDHKbDxDNaOE3NbCAdKQApno+GPRyo1YAp89yCjK4w==",
       "funding": [
         {
           "type": "individual",
@@ -78,9 +92,9 @@
       "integrity": "sha1-4j8/nE+Pvd6HJSnBBxhXoIblzO8="
     },
     "node_modules/multiformats": {
-      "version": "9.4.9",
-      "resolved": "https://registry.npmjs.org/multiformats/-/multiformats-9.4.9.tgz",
-      "integrity": "sha512-zA84TTJcRfRMpjvYqy63piBbSEdqlIGqNNSpP6kspqtougqjo60PRhIFo+oAxrjkof14WMCImvr7acK6rPpXLw=="
+      "version": "9.6.4",
+      "resolved": "https://registry.npmjs.org/multiformats/-/multiformats-9.6.4.tgz",
+      "integrity": "sha512-fCCB6XMrr6CqJiHNjfFNGT0v//dxOBMrOMqUIzpPc/mmITweLEyhvMpY9bF+jZ9z3vaMAau5E8B68DW77QMXkg=="
     },
     "node_modules/protocol-buffers-schema": {
       "version": "3.6.0",
@@ -106,15 +120,6 @@
         "varint": "~5.0.0"
       }
     },
-    "node_modules/time-to-seconds": {
-      "version": "1.1.5",
-      "resolved": "https://registry.npmjs.org/time-to-seconds/-/time-to-seconds-1.1.5.tgz",
-      "integrity": "sha512-mpzJDHGF4VdhiahyusCUSy+BWJdN3q8Cluzfy0n7GMU9IIj+HJDX9bbbr7wVSUiqmRn1vqhhfECgdfj+SByu2A==",
-      "engines": {
-        "node": ">=15.0.1",
-        "vscode": "^1.22.0"
-      }
-    },
     "node_modules/uint8arrays": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/uint8arrays/-/uint8arrays-3.0.0.tgz",
@@ -124,9 +129,9 @@
       }
     },
     "node_modules/underscore": {
-      "version": "1.13.1",
-      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.1.tgz",
-      "integrity": "sha512-hzSoAVtJF+3ZtiFX0VgfFPHEDRm7Y/QPjGyNo4TVdnDTdft3tr8hEkD25a1jC+TjTuE7tkHGKkhwCgs9dgBB2g=="
+      "version": "1.13.2",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.2.tgz",
+      "integrity": "sha512-ekY1NhRzq0B08g4bGuX4wd2jZx5GnKz6mKSqFL4nqBlfyMGiG10gDFhDTMEfYmDL6Jy0FUIZp7wiRB+0BP7J2g=="
     },
     "node_modules/underscore-keypath": {
       "version": "0.0.22",
@@ -137,9 +142,9 @@
       }
     },
     "node_modules/user-agents": {
-      "version": "1.0.814",
-      "resolved": "https://registry.npmjs.org/user-agents/-/user-agents-1.0.814.tgz",
-      "integrity": "sha512-OU3lCkkaUCghnZiZuN2edSJ+//ituJihs3P1FCjCDwe1tMBS8eni68CQ0TBbPoVPDtoAqxM3Z7qbP7EWGlhBxA==",
+      "version": "1.0.984",
+      "resolved": "https://registry.npmjs.org/user-agents/-/user-agents-1.0.984.tgz",
+      "integrity": "sha512-gFYUg9GRrUA5LPKBa+K2K6jML3VPseVxm2TzhfTMVpLuxYZGm4qM8egSfQ7DV8X4DTNwECHAhlwv6JWZnIsCHQ==",
       "dependencies": {
         "dot-json": "^1.2.2",
         "lodash.clonedeep": "^4.5.0"
@@ -188,10 +193,15 @@
         "underscore-keypath": "~0.0.22"
       }
     },
+    "flat": {
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/flat/-/flat-5.0.2.tgz",
+      "integrity": "sha512-b6suED+5/3rTpUBdG1gupIl8MPFCAMA0QXwmljLhvCUKcUvdE4gWky9zpuGCcXHOsz4J9wPGNWq6OKpmIzz3hQ=="
+    },
     "follow-redirects": {
-      "version": "1.14.4",
-      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.14.4.tgz",
-      "integrity": "sha512-zwGkiSXC1MUJG/qmeIFH2HBJx9u0V46QGUe3YR1fXG8bXQxq7fLj0RjLZQ5nubr9qNJUZrH+xUcwXEoXNpfS+g=="
+      "version": "1.14.9",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.14.9.tgz",
+      "integrity": "sha512-MQDfihBQYMcyy5dhRDJUHcw7lb2Pv/TuE6xP1vyraLukNDHKbDxDNaOE3NbCAdKQApno+GPRyo1YAp89yCjK4w=="
     },
     "lodash.clonedeep": {
       "version": "4.5.0",
@@ -199,9 +209,9 @@
       "integrity": "sha1-4j8/nE+Pvd6HJSnBBxhXoIblzO8="
     },
     "multiformats": {
-      "version": "9.4.9",
-      "resolved": "https://registry.npmjs.org/multiformats/-/multiformats-9.4.9.tgz",
-      "integrity": "sha512-zA84TTJcRfRMpjvYqy63piBbSEdqlIGqNNSpP6kspqtougqjo60PRhIFo+oAxrjkof14WMCImvr7acK6rPpXLw=="
+      "version": "9.6.4",
+      "resolved": "https://registry.npmjs.org/multiformats/-/multiformats-9.6.4.tgz",
+      "integrity": "sha512-fCCB6XMrr6CqJiHNjfFNGT0v//dxOBMrOMqUIzpPc/mmITweLEyhvMpY9bF+jZ9z3vaMAau5E8B68DW77QMXkg=="
     },
     "protocol-buffers-schema": {
       "version": "3.6.0",
@@ -227,11 +237,6 @@
         "varint": "~5.0.0"
       }
     },
-    "time-to-seconds": {
-      "version": "1.1.5",
-      "resolved": "https://registry.npmjs.org/time-to-seconds/-/time-to-seconds-1.1.5.tgz",
-      "integrity": "sha512-mpzJDHGF4VdhiahyusCUSy+BWJdN3q8Cluzfy0n7GMU9IIj+HJDX9bbbr7wVSUiqmRn1vqhhfECgdfj+SByu2A=="
-    },
     "uint8arrays": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/uint8arrays/-/uint8arrays-3.0.0.tgz",
@@ -241,9 +246,9 @@
       }
     },
     "underscore": {
-      "version": "1.13.1",
-      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.1.tgz",
-      "integrity": "sha512-hzSoAVtJF+3ZtiFX0VgfFPHEDRm7Y/QPjGyNo4TVdnDTdft3tr8hEkD25a1jC+TjTuE7tkHGKkhwCgs9dgBB2g=="
+      "version": "1.13.2",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.2.tgz",
+      "integrity": "sha512-ekY1NhRzq0B08g4bGuX4wd2jZx5GnKz6mKSqFL4nqBlfyMGiG10gDFhDTMEfYmDL6Jy0FUIZp7wiRB+0BP7J2g=="
     },
     "underscore-keypath": {
       "version": "0.0.22",
@@ -254,9 +259,9 @@
       }
     },
     "user-agents": {
-      "version": "1.0.814",
-      "resolved": "https://registry.npmjs.org/user-agents/-/user-agents-1.0.814.tgz",
-      "integrity": "sha512-OU3lCkkaUCghnZiZuN2edSJ+//ituJihs3P1FCjCDwe1tMBS8eni68CQ0TBbPoVPDtoAqxM3Z7qbP7EWGlhBxA==",
+      "version": "1.0.984",
+      "resolved": "https://registry.npmjs.org/user-agents/-/user-agents-1.0.984.tgz",
+      "integrity": "sha512-gFYUg9GRrUA5LPKBa+K2K6jML3VPseVxm2TzhfTMVpLuxYZGm4qM8egSfQ7DV8X4DTNwECHAhlwv6JWZnIsCHQ==",
       "requires": {
         "dot-json": "^1.2.2",
         "lodash.clonedeep": "^4.5.0"

package.json

@@ -1,21 +1,25 @@
 {
   "name": "youtubei.js",
-  "version": "1.2.2",
-  "description": "An object-oriented library that allows you to search, get detailed info about videos, subscribe, unsubscribe, like, dislike, comment, download videos and much more!",
+  "version": "1.4.0",
+  "description": "A full-featured library that allows you to get detailed info about any video, subscribe, unsubscribe, like, dislike, comment, search, download videos/music and much more!",
   "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "author": "LuanRT",
+  "author": "LuanRT <luan.lrt4@gmail.com> (https://github.com/LuanRT)",
+  "funding": "https://ko-fi.com/luanrt",
   "license": "MIT",
+  "engines": {
+    "node": ">=14"
+  },
+  "scripts": {
+    "test": "node test"
+  },
   "directories": {
     "example": "examples",
     "lib": "lib"
   },
   "dependencies": {
     "axios": "^0.21.4",
+    "flat": "^5.0.2",
     "protons": "^2.0.3",
-    "time-to-seconds": "^1.1.5",
     "user-agents": "^1.0.778",
     "uuid": "^8.3.2"
   },
@@ -23,24 +27,26 @@
     "type": "git",
     "url": "git+https//github.com/LuanRT/YouTube.js.git"
   },
-  "keywords": [
-    "youtube",
-    "youtube-dl",
-    "innertube",
-    "innertubeapi",
-    "livechat",
-    "api",
-    "search",
-    "like",
-    "dislike",
-    "comment",
-    "automation",
-    "downloader",
-    "comments-section",
-    "youtube-downloader"
-  ],
   "bugs": {
     "url": "https://github.com/LuanRT/YouTube.js/issues"
   },
-  "homepage": "https://github.com/LuanRT/YouTube.js#readme"
+  "homepage": "https://github.com/LuanRT/YouTube.js#readme",
+  "keywords": [
+    "yt",
+    "ytdl",
+    "youtube",
+    "youtube-dl",
+    "youtubedl",
+    "youtube-downloader",
+    "innertube",
+    "innertubeapi",
+    "downloader",
+    "livechat",
+    "dislike",
+    "search",
+    "comment",
+    "like",
+    "api",
+    "dl"
+  ]
 }

test/constants.js

@@ -0,0 +1,24 @@
+'use strict';
+
+module.exports = {
+  test_url: 's=t%3DQ%3DAv2TLJ2sbQFV5msp4j7v71gS1rsXNd6QH2V1KpxGlaOD%3DIC46mVzTVTW_2zttE32HKH7XO1jkyfOJs58avqMLKdvRdgIQRw8JQ0qOA&sp=sig&url=https://r1---sn-hxtxgcg-8qjl.googlevideo.com/videoplayback%3Fexpire%3D1635863482%26ei%3DWveAYdqsB6KPobIPjtWwYA%26ip%3D128.201.98.50%26id%3Do-ABuHwkfRnd4hOQoDKRKn7ZHvuLEPAPKkYhiYKpTwLrY7%26itag%3D18%26source%3Dyoutube%26requiressl%3Dyes%26mh%3DG3%26mm%3D31%252C29%26mn%3Dsn-hxtxgcg-8qjl%252Csn-gpv7dned%26ms%3Dau%252Crdu%26mv%3Dm%26mvi%3D1%26pl%3D24%26initcwndbps%3D397500%26vprv%3D1%26mime%3Dvideo%252Fmp4%26ns%3Dv9CYauI2ycUgrV6wOERCNxsG%26gir%3Dyes%26clen%3D7275579%26ratebypass%3Dyes%26dur%3D218.290%26lmt%3D1540416860737282%26mt%3D1635841731%26fvip%3D4%26fexp%3D24001373%252C24007246%26c%3DWEB%26txp%3D5531432%26n%3DD8yGa-DC5m2Dwv--%26sparams%3Dexpire%252Cei%252Cip%252Cid%252Citag%252Csource%252Crequiressl%252Cvprv%252Cmime%252Cns%252Cgir%252Cclen%252Cratebypass%252Cdur%252Clmt%26lsparams%3Dmh%252Cmm%252Cmn%252Cms%252Cmv%252Cmvi%252Cpl%252Cinitcwndbps%26lsig%3DAG3C_xAwRAIgdS6ux5rh5ulfwh8c6_Kt2cOdyS51OxPlxSUoB5k5x9YCICOgRiuFsZwAqJmxvBrCuq3CKk1S4YeAxEq3zPLvzAvX',
+  expected_url: 'https://r1---sn-hxtxgcg-8qjl.googlevideo.com/videoplayback?expire=1635863482&ei=WveAYdqsB6KPobIPjtWwYA&ip=128.201.98.50&id=o-ABuHwkfRnd4hOQoDKRKn7ZHvuLEPAPKkYhiYKpTwLrY7&itag=18&source=youtube&requiressl=yes&mh=G3&mm=31%2C29&mn=sn-hxtxgcg-8qjl%2Csn-gpv7dned&ms=au%2Crdu&mv=m&mvi=1&pl=24&initcwndbps=397500&vprv=1&mime=video%2Fmp4&ns=v9CYauI2ycUgrV6wOERCNxsG&gir=yes&clen=7275579&ratebypass=yes&dur=218.290&lmt=1540416860737282&mt=1635841731&fvip=4&fexp=24001373%2C24007246&c=WEB&txp=5531432&n=D8yGa-DC5m2Dwv--&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cgir%2Cclen%2Cratebypass%2Cdur%2Clmt&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRAIgdS6ux5rh5ulfwh8c6_Kt2cOdyS51OxPlxSUoB5k5x9YCICOgRiuFsZwAqJmxvBrCuq3CKk1S4YeAxEq3zPLvzAvX&sig=AOq0QJ8wRQIgdRvdKLMqva85sJOfykj1OX7HKH23Ettz2_WTVTzVm64CIQDOalGxpK1V2Ht6dNXsr1Sg17v7j4psm5VFQbs2JLT2vA%3D%3D',
+  original_ntoken: 'PqjqqJjdB9K821VIisj',
+  expected_ntoken: 'AxwyS-osUl1WhMUd1',
+  client_version: '2.20211101.01.00',
+  test_video_id: 'dQw4w9WgXcQ',
+  sig_decipher_sc: `fB={RP:function(a,b){a.splice(0,b)},
+Td:function(a){a.reverse()},
+kq:function(a,b){var c=a[0];a[0]=a[b%a.length];a[b%a.length]=c};fB.kq(a,35);fB.RP(a,2);fB.kq(a,46);fB.Td(a,6);`,
+  n_scramble_sc: `var b=a.split(""),c=[-470482026,-691770757,function(d,e){e=(e%d.length+d.length)%d.length;d.splice(-e).reverse().forEach(function(f){d.unshift(f)})},
+b,258876269,-1426380890,318754300,-68090711,-2064438462,-1886316521,1913911047,1635047330,function(d,e){e=(e%d.length+d.length)%d.length;d.splice(-e).reverse().forEach(function(f){d.unshift(f)})},
+-1815897225,1940621629,-714586149,-1723898467,null,778601498,2145333248,1245726977,1952270083,268207944,244274044,null,function(d,e){e=(e%d.length+d.length)%d.length;d.splice(0,1,d.splice(e,1,d[0])[0])},
+null,-762271981,604636391,1087224318,-931565987,-338396815,function(d,e){for(e=(e%d.length+d.length)%d.length;e--;)d.unshift(d.pop())},
+2126741474,function(d){for(var e=d.length;e;)d.push(d.splice(--e,1)[0])},
+-1874551858,-1238260579,498106911,1913911047,-1951114300,-504396507,b,344510945,905306344,b,function(d,e){e=(e%d.length+d.length)%d.length;var f=d[0];d[0]=d[e];d[e]=f},
+909033134,1027812119,1686673079,function(d,e){d.push(e)},
+-1902376100,function(d,e){e=(e%d.length+d.length)%d.length;d.splice(e,1)},
+"push",function(d,e){for(var f=64,h=[];++f-h.length-32;)switch(f){case 58:f=96;continue;case 91:f=44;break;case 65:f=47;continue;case 46:f=153;case 123:f-=58;default:h.push(String.fromCharCode(f))}d.forEach(function(l,m,n){this.push(n[m]=h[(h.indexOf(l)-h.indexOf(this[m])+m-32+f--)%h.length])},e.split(""))}];
+c[17]=c;c[24]=c;c[26]=c;try{c[45](c[17],c[38]),c[12](c[44],c[29]),c[45](c[26],c[0]),c[51](c[41],c[13]),c[12](c[41],c[27]),c[12](c[26],c[11]),c[39](c[17],c[49]),c[9](c[38],c[47]),c[26](c[40],c[0]),c[7](c[8],c[44]),c[14](c[54],c[0]),c[18](c[3],c[25]),c[7](c[33],c[36]),c[15](c[19],c[14]),c[7](c[19],c[9]),c[7](c[6],c[12]),c[41](c[33],c[35]),c[7](c[40],c[5]),c[50](c[42]),c[13](c[14],c[17]),c[6](c[35],c[51]),c[26](c[48],c[50]),c[26](c[35],c[0]),c[6](c[21],c[46]),c[15](c[21],c[42]),c[1](c[2],c[43]),c[15](c[2],
+c[31]),c[1](c[21],c[25]),c[22](c[30],c[17]),c[15](c[44],c[46]),c[22](c[44],c[11]),c[22](c[23],c[38]),c[1](c[23],c[14]),c[35](c[23],c[44]),c[11](c[53],c[20]),c[9](c[51]),c[31](c[51],c[28]),c[18](c[51],c[35]),c[46](c[53],c[6]),c[52](c[51],c[49]),c[11](c[53],c[15])}catch(d){return"enhanced_except_75MBkOz-_w8_"+a} return b.join("");`
+};

test/index.js

@@ -0,0 +1,75 @@
+'use strict';
+
+const Fs = require('fs');
+const Innertube = require('..');
+const NToken = require('../lib/deciphers/NToken');
+const SigDecipher = require('../lib/deciphers/Sig');
+const Constants = require('./constants');
+
+let failed_tests = 0;
+
+async function performTests() {
+  const youtube = await new Innertube().catch((error) => error);
+  assert(!(youtube instanceof Error), `should retrieve Innertube configuration data`, youtube);
+
+  if (!(youtube instanceof Error)) {
+    const homefeed = await youtube.getHomeFeed();
+    assert(!(homefeed instanceof Error), `should retrieve recommendations`, homefeed);
+    
+    const ytsearch = await youtube.search('Carl Sagan - Documentary').catch((error) => error);
+    assert(!(ytsearch instanceof Error) && ytsearch.videos.length, `should search on YouTube`, ytsearch);
+    
+    const ytmsearch = await youtube.search('Logic - Obediently Yours', { client: 'YTMUSIC' }).catch((error) => error);
+    assert(!(ytmsearch instanceof Error), `should search on YouTube Music`, ytmsearch);
+     
+    const details = await youtube.getDetails(Constants.test_video_id).catch((error) => error);
+    assert(!(details instanceof Error), `should retrieve details for ${Constants.test_video_id}`, details);
+
+    const comments = await youtube.getComments(Constants.test_video_id).catch((error) => error);
+    assert(!(comments instanceof Error), `should retrieve comments for ${Constants.test_video_id}`, comments);
+    
+    const ytplaylist = await youtube.getPlaylist(ytmsearch.results.community_playlists[0].id, { client: 'YOUTUBE' });
+    assert(!(ytplaylist instanceof Error), `should retrieve and parse playlist with YouTube`, ytplaylist);
+    
+    const ytmplaylist = await youtube.getPlaylist(ytmsearch.results.community_playlists[0].id, { client: 'YTMUSIC' });
+    assert(!(ytmplaylist instanceof Error), `should retrieve and parse playlist with YouTube Music`, ytmplaylist);
+    
+    const lyrics = await youtube.getLyrics(ytmsearch.results.songs[0].id);
+    assert(!(lyrics instanceof Error), `should retrieve song lyrics`, lyrics);
+    
+    const video = await downloadVideo(Constants.test_video_id, youtube).catch((error) => error);
+    assert(!(video instanceof Error), `should download video (${Constants.test_video_id})`, video);
+  }
+
+  const n_token = new NToken(Constants.n_scramble_sc, Constants.original_ntoken).transform();
+  assert(n_token == Constants.expected_ntoken, `should transform n token into ${Constants.expected_ntoken}`, n_token);
+
+  const transformed_url = new SigDecipher(Constants.test_url, { sig_decipher_sc: Constants.sig_decipher_sc }).decipher();
+  assert(transformed_url == Constants.expected_url, `should correctly decipher signature`, transformed_url);
+
+  if (failed_tests > 0)
+    throw new Error('Some tests have failed');
+}
+
+function downloadVideo(id, youtube) {
+  return new Promise((resolve, reject) => {
+    let got_video_info = false;
+    const stream = youtube.download(id, { type: 'videoandaudio' });
+    stream.pipe(Fs.createWriteStream(`./${id}.mp4`));
+    stream.on('end', () => Fs.existsSync(`./${id}.mp4`) && got_video_info && resolve() || reject());
+    stream.on('info', () => got_video_info = true);
+    stream.on('error', (err) => reject(err));
+  });
+}
+
+function assert(outcome, description, data) {
+  const pass_fail = outcome ? 'pass' : 'fail';
+
+  console.info(pass_fail, ':', description);
+  !outcome && (failed_tests += 1);
+  !outcome && console.error('Error: ', data);
+
+  return outcome;
+}
+
+performTests();