WIP

app/javascript/mastodon/actions/accounts.js

@@ -1,5 +1,4 @@
 import api, { getLinks } from '../api';
-import openDB from '../storage/db';
 import { importAccount, importFetchedAccount, importFetchedAccounts } from './importer';
 
 export const ACCOUNT_FETCH_REQUEST = 'ACCOUNT_FETCH_REQUEST';
@@ -74,24 +73,6 @@ export const FOLLOW_REQUEST_REJECT_REQUEST = 'FOLLOW_REQUEST_REJECT_REQUEST';
 export const FOLLOW_REQUEST_REJECT_SUCCESS = 'FOLLOW_REQUEST_REJECT_SUCCESS';
 export const FOLLOW_REQUEST_REJECT_FAIL    = 'FOLLOW_REQUEST_REJECT_FAIL';
 
-function getFromDB(dispatch, getState, index, id) {
-  return new Promise((resolve, reject) => {
-    const request = index.get(id);
-
-    request.onerror = reject;
-
-    request.onsuccess = () => {
-      if (!request.result) {
-        reject();
-        return;
-      }
-
-      dispatch(importAccount(request.result));
-      resolve(request.result.moved && getFromDB(dispatch, getState, index, request.result.moved));
-    };
-  });
-}
-
 export function fetchAccount(id) {
   return (dispatch, getState) => {
     dispatch(fetchRelationships([id]));
@@ -102,17 +83,8 @@ export function fetchAccount(id) {
 
     dispatch(fetchAccountRequest(id));
 
-    openDB().then(db => getFromDB(
-      dispatch,
-      getState,
-      db.transaction('accounts', 'read').objectStore('accounts').index('id'),
-      id,
-    ).then(() => db.close(), error => {
-      db.close();
-      throw error;
-    })).catch(() => api(getState).get(`/api/v1/accounts/${id}`).then(response => {
+    api(getState).get(`/api/v1/accounts/${id}`).then(response => {
       dispatch(importFetchedAccount(response.data));
-    })).then(() => {
       dispatch(fetchAccountSuccess());
     }).catch(error => {
       dispatch(fetchAccountFail(id, error));

app/javascript/mastodon/actions/crypto.js

@@ -0,0 +1,111 @@
+import api, { getLinks } from '../api';
+import Olm from 'olm';
+import olmModule from 'olm/olm.wasm';
+import CryptoStore from './crypto/store';
+
+export const CRYPTO_INITIALIZE_REQUEST = 'CRYPTO_INITIALIZE_REQUEST';
+export const CRYPTO_INITIALIZE_SUCCESS = 'CRYPTO_INITIALIZE_SUCCESS';
+export const CRYPTO_INITIALIZE_FAIL    = 'CRYPTO_INITIALIZE_FAIL ';
+
+const cryptoStore = new CryptoStore();
+
+const loadOlm = () => Olm.init({
+
+  locateFile: path => {
+    if (path.endsWith('.wasm')) {
+      return olmModule;
+    }
+
+    return path;
+  },
+
+});
+
+const getRandomBytes = size => {
+  const array = new Uint8Array(size);
+  crypto.getRandomValues(array);
+  return array.buffer;
+};
+
+const generateDeviceId = () => {
+  const id = new Uint16Array(getRandomBytes(2))[0];
+  return id & 0x3fff;
+};
+
+export const initializeCryptoRequest = () => ({
+  type: CRYPTO_INITIALIZE_REQUEST,
+});
+
+export const initializeCryptoSuccess = account => ({
+  type: CRYPTO_INITIALIZE_SUCCESS,
+  account,
+});
+
+export const initializeCryptoFail = error => ({
+  type: CRYPTO_INITIALIZE_FAIL,
+  error,
+});
+
+export const initializeCrypto = () => (dispatch, getState) => {
+  dispatch(initializeCryptoRequest());
+
+  loadOlm().then(() => {
+    return cryptoStore.getAccount();
+  }).then(account => {
+    dispatch(initializeCryptoSuccess(account));
+  }).catch(err => {
+    console.error(err);
+    dispatch(initializeCryptoFail(err));
+  });
+};
+
+export const enableCrypto = () => (dispatch, getState) => {
+  dispatch(initializeCryptoRequest());
+
+  loadOlm().then(() => {
+    const deviceId = generateDeviceId();
+    const account  = new Olm.Account();
+
+    account.create();
+    account.generate_one_time_keys(10);
+
+    const deviceName   = 'Browser';
+    const identityKeys = JSON.parse(account.identity_keys());
+    const oneTimeKeys  = JSON.parse(account.one_time_keys());
+
+    return cryptoStore.storeAccount(account).then(api(getState).post('/api/v1/crypto/keys/upload', {
+      device: {
+        device_id: deviceId,
+        name: deviceName,
+        fingerprint_key: identityKeys.ed25519,
+        identity_key: identityKeys.curve25519,
+      },
+
+      one_time_keys: Object.keys(oneTimeKeys.curve25519).map(key => ({
+        key_id: key,
+        key: oneTimeKeys.curve25519[key],
+        signature: account.sign(oneTimeKeys.curve25519[key]),
+      })),
+    })).then(() => {
+      account.mark_keys_as_published();
+    }).then(() => {
+      return cryptoStore.storeAccount(account);
+    }).then(() => {
+      dispatch(initializeCryptoSuccess(account));
+    });
+  }).catch(err => {
+    console.error(err);
+    dispatch(initializeCryptoFail(err));
+  });
+};
+
+const MESSAGE_PREKEY = 0;
+
+export const receiveCrypto = encryptedMessage => (dispatch, getState) => {
+  const { account_id, device_id, type, body } = encryptedMessage;
+  const deviceKey = `${account_id}:${device_id}`;
+
+  cryptoStore.decryptMessage(deviceKey, type, body).then(payloadString => {
+    console.log(encryptedMessage, payloadString);
+  });
+};

app/javascript/mastodon/actions/crypto/store.js

@@ -0,0 +1,110 @@
+import Dexie from 'dexie';
+import Olm from 'olm';
+
+const MESSAGE_TYPE_PREKEY = 0;
+
+export default class CryptoStore {
+
+  constructor() {
+    this.pickleKey = 'DEFAULT_KEY';
+
+    this.db = new Dexie('mastodon-crypto');
+
+    this.db.version(1).stores({
+      accounts: '',
+      sessions: 'deviceKey,sessionId',
+    });
+  }
+
+  // FIXME: Need to call free() on returned accounts at some point
+  // but it needs to happen *after* you're done using them
+  getAccount () {
+    return this.db.accounts.get('-').then(pickledAccount => {
+      if (typeof pickledAccount === 'undefined') {
+        return null;
+      }
+
+      const account = new Olm.Account();
+
+      account.unpickle(this.pickleKey, pickledAccount);
+
+      return account;
+    });
+  }
+
+  storeAccount (account) {
+    return this.db.accounts.put(account.pickle(this.pickleKey), '-');
+  }
+
+  storeSession (deviceKey, session) {
+    return this.db.sessions.put({
+      deviceKey,
+      sessionId: session.session_id(),
+      pickledSession: session.pickle(this.pickleKey),
+    });
+  }
+
+  createInboundSession (deviceKey, type, body) {
+    return this.getAccount().then(account => {
+      const session = new Olm.Session();
+
+      let payloadString;
+
+      try {
+        session.create_inbound(account, body);
+        account.remove_one_time_keys(session);
+        this.storeAccount(account);
+
+        payloadString = session.decrypt(type, body);
+
+        this.storeSession(deviceKey, session);
+      } finally {
+        session.free();
+        account.free();
+      }
+
+      return payloadString;
+    });
+  }
+
+  // FIXME: Need to call free() on returned sessions at some point
+  // but it needs to happen *after* you're done using them
+  getSessionsForDevice (deviceKey) {
+    return this.db.sessions.where('deviceKey').equals(deviceKey).toArray().then(sessions => sessions.map(sessionData => {
+      const session = new Olm.Session();
+
+      session.unpickle(this.pickleKey, sessionData.pickledSession);
+
+      return session;
+    }));
+  }
+
+  decryptMessage (deviceKey, type, body) {
+    return this.getSessionsForDevice(deviceKey).then(sessions => {
+      let payloadString;
+
+      sessions.forEach(session => {
+        try {
+          payloadString = this.decryptMessageForSession(deviceKey, session, type, body);
+        } catch (e) {
+          console.error(e);
+        }
+      });
+
+      if (typeof payloadString !== 'undefined') {
+        return payloadString;
+      }
+
+      if (type === MESSAGE_TYPE_PREKEY) {
+        return this.createInboundSession(deviceKey, type, body);
+      }
+    });
+  }
+
+  decryptMessageForSession (deviceKey, session, type, body) {
+    const payloadString = session.decrypt(type, body);
+    this.storeSession(deviceKey, session);
+    return payloadString;
+  }
+
+}

app/javascript/mastodon/actions/statuses.js

@@ -1,6 +1,4 @@
 import api from '../api';
-import openDB from '../storage/db';
-import { evictStatus } from '../storage/modifier';
 
 import { deleteFromTimelines } from './timelines';
 import { importFetchedStatus, importFetchedStatuses, importAccount, importStatus, importFetchedAccount } from './importer';
@@ -94,23 +92,10 @@ export function fetchStatus(id) {
 
     dispatch(fetchStatusRequest(id, skipLoading));
 
-    openDB().then(db => {
-      const transaction = db.transaction(['accounts', 'statuses'], 'read');
-      const accountIndex = transaction.objectStore('accounts').index('id');
-      const index = transaction.objectStore('statuses').index('id');
-
-      return getFromDB(dispatch, getState, accountIndex, index, id).then(() => {
-        db.close();
-      }, error => {
-        db.close();
-        throw error;
-      });
-    }).then(() => {
-      dispatch(fetchStatusSuccess(skipLoading));
-    }, () => api(getState).get(`/api/v1/statuses/${id}`).then(response => {
+    api(getState).get(`/api/v1/statuses/${id}`).then(response => {
       dispatch(importFetchedStatus(response.data));
       dispatch(fetchStatusSuccess(skipLoading));
-    })).catch(error => {
+    }).catch(error => {
       dispatch(fetchStatusFail(id, error, skipLoading));
     });
   };
@@ -152,7 +137,6 @@ export function deleteStatus(id, routerHistory, withRedraft = false) {
     dispatch(deleteStatusRequest(id));
 
     api(getState).delete(`/api/v1/statuses/${id}`).then(response => {
-      evictStatus(id);
       dispatch(deleteStatusSuccess(id));
       dispatch(deleteFromTimelines(id));
       dispatch(importFetchedAccount(response.data.account));

app/javascript/mastodon/actions/streaming.js

@@ -8,6 +8,7 @@ import {
 } from './timelines';
 import { updateNotifications, expandNotifications } from './notifications';
 import { updateConversations } from './conversations';
+import { receiveCrypto } from './crypto';
 import {
   fetchAnnouncements,
   updateAnnouncements,
@@ -59,6 +60,9 @@ export function connectTimelineStream (timelineId, path, pollingRefresh = null,
         case 'announcement.delete':
           dispatch(deleteAnnouncement(data.payload));
           break;
+        case 'encrypted_message':
+          dispatch(receiveCrypto(JSON.parse(data.payload)));
+          break;
         }
       },
     };

app/javascript/mastodon/features/direct_timeline/index.js

@@ -3,17 +3,21 @@ import { connect } from 'react-redux';
 import PropTypes from 'prop-types';
 import Column from '../../components/column';
 import ColumnHeader from '../../components/column_header';
-import { mountConversations, unmountConversations, expandConversations } from '../../actions/conversations';
+import { mountConversations } from '../../actions/conversations';
 import { addColumn, removeColumn, moveColumn } from '../../actions/columns';
 import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
-import { connectDirectStream } from '../../actions/streaming';
+import { initializeCrypto, enableCrypto } from 'mastodon/actions/crypto';
 import ConversationsListContainer from './containers/conversations_list_container';
 
 const messages = defineMessages({
   title: { id: 'column.direct', defaultMessage: 'Direct messages' },
 });
 
-export default @connect()
+const mapStateToProps = state => ({
+  enabled: state.getIn(['crypto', 'enabled']),
+});
+
+export default @connect(mapStateToProps)
 @injectIntl
 class DirectTimeline extends React.PureComponent {
 
@@ -24,6 +28,7 @@ class DirectTimeline extends React.PureComponent {
     intl: PropTypes.object.isRequired,
     hasUnread: PropTypes.bool,
     multiColumn: PropTypes.bool,
+    enabled: PropTypes.bool,
   };
 
   handlePin = () => {
@@ -49,29 +54,23 @@ class DirectTimeline extends React.PureComponent {
     const { dispatch } = this.props;
 
     dispatch(mountConversations());
-    dispatch(expandConversations());
-    this.disconnect = dispatch(connectDirectStream());
+    dispatch(initializeCrypto());
   }
 
   componentWillUnmount () {
     this.props.dispatch(unmountConversations());
-
-    if (this.disconnect) {
-      this.disconnect();
-      this.disconnect = null;
-    }
   }
 
   setRef = c => {
     this.column = c;
   }
 
-  handleLoadMore = maxId => {
-    this.props.dispatch(expandConversations({ maxId }));
+  handleEnableCrypto = () => {
+    this.props.dispatch(enableCrypto());
   }
 
   render () {
-    const { intl, hasUnread, columnId, multiColumn, shouldUpdateScroll } = this.props;
+    const { intl, hasUnread, columnId, multiColumn, shouldUpdateScroll, enabled } = this.props;
     const pinned = !!columnId;
 
     return (
@@ -87,14 +86,9 @@ class DirectTimeline extends React.PureComponent {
           multiColumn={multiColumn}
         />
 
-        <ConversationsListContainer
-          trackScroll={!pinned}
-          scrollKey={`direct_timeline-${columnId}`}
-          timelineId='direct'
-          onLoadMore={this.handleLoadMore}
-          emptyMessage={<FormattedMessage id='empty_column.direct' defaultMessage="You don't have any direct messages yet. When you send or receive one, it will show up here." />}
-          shouldUpdateScroll={shouldUpdateScroll}
-        />
+        {!enabled && <button onClick={this.handleEnableCrypto}>Enable crypto</button>}
+
+        {enabled && <span>Crypto enabled</span>}
       </Column>
     );
   }

app/javascript/mastodon/reducers/crypto.js

@@ -0,0 +1,15 @@
+import { CRYPTO_INITIALIZE_SUCCESS } from 'mastodon/actions/crypto';
+import { Map as ImmutableMap } from 'immutable';
+
+const initialState = ImmutableMap({
+  enabled: false,
+});
+
+export default function crypto (state = initialState, action) {
+  switch(action.type) {
+  case CRYPTO_INITIALIZE_SUCCESS:
+    return state.set('enabled', action.account !== null);
+  default:
+    return state;
+  }
+};

app/javascript/mastodon/reducers/index.js

@@ -36,6 +36,7 @@ import trends from './trends';
 import missed_updates from './missed_updates';
 import announcements from './announcements';
 import markers from './markers';
+import crypto from './crypto';
 
 const reducers = {
   announcements,
@@ -75,6 +76,7 @@ const reducers = {
   trends,
   missed_updates,
   markers,
+  crypto,
 };
 
 export default combineReducers(reducers);

app/javascript/mastodon/storage/db.js

@@ -1,27 +0,0 @@
-export default () => new Promise((resolve, reject) => {
-  // ServiceWorker is required to synchronize the login state.
-  // Microsoft Edge 17 does not support getAll according to:
-  // Catalog of standard and vendor APIs across browsers - Microsoft Edge Development
-  // https://developer.microsoft.com/en-us/microsoft-edge/platform/catalog/?q=specName%3Aindexeddb
-  if (!('caches' in self && 'getAll' in IDBObjectStore.prototype)) {
-    reject();
-    return;
-  }
-
-  const request = indexedDB.open('mastodon');
-
-  request.onerror = reject;
-  request.onsuccess = ({ target }) => resolve(target.result);
-
-  request.onupgradeneeded = ({ target }) => {
-    const accounts = target.result.createObjectStore('accounts', { autoIncrement: true });
-    const statuses = target.result.createObjectStore('statuses', { autoIncrement: true });
-
-    accounts.createIndex('id', 'id', { unique: true });
-    accounts.createIndex('moved', 'moved');
-
-    statuses.createIndex('id', 'id', { unique: true });
-    statuses.createIndex('account', 'account');
-    statuses.createIndex('reblog', 'reblog');
-  };
-});

app/javascript/mastodon/storage/modifier.js

@@ -1,211 +0,0 @@
-import openDB from './db';
-
-const accountAssetKeys = ['avatar', 'avatar_static', 'header', 'header_static'];
-const storageMargin = 8388608;
-const storeLimit = 1024;
-
-// navigator.storage is not present on:
-// Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.100 Safari/537.36 Edge/16.16299
-// estimate method is not present on Chrome 57.0.2987.98 on Linux.
-export const storageFreeable = 'storage' in navigator && 'estimate' in navigator.storage;
-
-function openCache() {
-  // ServiceWorker and Cache API is not available on iOS 11
-  // https://webkit.org/status/#specification-service-workers
-  return self.caches ? caches.open('mastodon-system') : Promise.reject();
-}
-
-function printErrorIfAvailable(error) {
-  if (error) {
-    console.warn(error);
-  }
-}
-
-function put(name, objects, onupdate, oncreate) {
-  return openDB().then(db => (new Promise((resolve, reject) => {
-    const putTransaction = db.transaction(name, 'readwrite');
-    const putStore = putTransaction.objectStore(name);
-    const putIndex = putStore.index('id');
-
-    objects.forEach(object => {
-      putIndex.getKey(object.id).onsuccess = retrieval => {
-        function addObject() {
-          putStore.add(object);
-        }
-
-        function deleteObject() {
-          putStore.delete(retrieval.target.result).onsuccess = addObject;
-        }
-
-        if (retrieval.target.result) {
-          if (onupdate) {
-            onupdate(object, retrieval.target.result, putStore, deleteObject);
-          } else {
-            deleteObject();
-          }
-        } else {
-          if (oncreate) {
-            oncreate(object, addObject);
-          } else {
-            addObject();
-          }
-        }
-      };
-    });
-
-    putTransaction.oncomplete = () => {
-      const readTransaction = db.transaction(name, 'readonly');
-      const readStore = readTransaction.objectStore(name);
-      const count = readStore.count();
-
-      count.onsuccess = () => {
-        const excess = count.result - storeLimit;
-
-        if (excess > 0) {
-          const retrieval = readStore.getAll(null, excess);
-
-          retrieval.onsuccess = () => resolve(retrieval.result);
-          retrieval.onerror = reject;
-        } else {
-          resolve([]);
-        }
-      };
-
-      count.onerror = reject;
-    };
-
-    putTransaction.onerror = reject;
-  })).then(resolved => {
-    db.close();
-    return resolved;
-  }, error => {
-    db.close();
-    throw error;
-  }));
-}
-
-function evictAccountsByRecords(records) {
-  return openDB().then(db => {
-    const transaction = db.transaction(['accounts', 'statuses'], 'readwrite');
-    const accounts = transaction.objectStore('accounts');
-    const accountsIdIndex = accounts.index('id');
-    const accountsMovedIndex = accounts.index('moved');
-    const statuses = transaction.objectStore('statuses');
-    const statusesIndex = statuses.index('account');
-
-    function evict(toEvict) {
-      toEvict.forEach(record => {
-        openCache()
-          .then(cache => accountAssetKeys.forEach(key => cache.delete(records[key])))
-          .catch(printErrorIfAvailable);
-
-        accountsMovedIndex.getAll(record.id).onsuccess = ({ target }) => evict(target.result);
-
-        statusesIndex.getAll(record.id).onsuccess =
-          ({ target }) => evictStatusesByRecords(target.result);
-
-        accountsIdIndex.getKey(record.id).onsuccess =
-          ({ target }) => target.result && accounts.delete(target.result);
-      });
-    }
-
-    evict(records);
-
-    db.close();
-  }).catch(printErrorIfAvailable);
-}
-
-export function evictStatus(id) {
-  evictStatuses([id]);
-}
-
-export function evictStatuses(ids) {
-  return openDB().then(db => {
-    const transaction = db.transaction('statuses', 'readwrite');
-    const store = transaction.objectStore('statuses');
-    const idIndex = store.index('id');
-    const reblogIndex = store.index('reblog');
-
-    ids.forEach(id => {
-      reblogIndex.getAllKeys(id).onsuccess =
-        ({ target }) => target.result.forEach(reblogKey => store.delete(reblogKey));
-
-      idIndex.getKey(id).onsuccess =
-        ({ target }) => target.result && store.delete(target.result);
-    });
-
-    db.close();
-  }).catch(printErrorIfAvailable);
-}
-
-function evictStatusesByRecords(records) {
-  return evictStatuses(records.map(({ id }) => id));
-}
-
-export function putAccounts(records, avatarStatic) {
-  const avatarKey = avatarStatic ? 'avatar_static' : 'avatar';
-  const newURLs = [];
-
-  put('accounts', records, (newRecord, oldKey, store, oncomplete) => {
-    store.get(oldKey).onsuccess = ({ target }) => {
-      accountAssetKeys.forEach(key => {
-        const newURL = newRecord[key];
-        const oldURL = target.result[key];
-
-        if (newURL !== oldURL) {
-          openCache()
-            .then(cache => cache.delete(oldURL))
-            .catch(printErrorIfAvailable);
-        }
-      });
-
-      const newURL = newRecord[avatarKey];
-      const oldURL = target.result[avatarKey];
-
-      if (newURL !== oldURL) {
-        newURLs.push(newURL);
-      }
-
-      oncomplete();
-    };
-  }, (newRecord, oncomplete) => {
-    newURLs.push(newRecord[avatarKey]);
-    oncomplete();
-  }).then(records => Promise.all([
-    evictAccountsByRecords(records),
-    openCache().then(cache => cache.addAll(newURLs)),
-  ])).then(freeStorage, error => {
-    freeStorage();
-    throw error;
-  }).catch(printErrorIfAvailable);
-}
-
-export function putStatuses(records) {
-  put('statuses', records)
-    .then(evictStatusesByRecords)
-    .catch(printErrorIfAvailable);
-}
-
-export function freeStorage() {
-  return storageFreeable && navigator.storage.estimate().then(({ quota, usage }) => {
-    if (usage + storageMargin < quota) {
-      return null;
-    }
-
-    return openDB().then(db => new Promise((resolve, reject) => {
-      const retrieval = db.transaction('accounts', 'readonly').objectStore('accounts').getAll(null, 1);
-
-      retrieval.onsuccess = () => {
-        if (retrieval.result.length > 0) {
-          resolve(evictAccountsByRecords(retrieval.result).then(freeStorage));
-        } else {
-          resolve(caches.delete('mastodon-system'));
-        }
-      };
-
-      retrieval.onerror = reject;
-
-      db.close();
-    }));
-  });
-}

config/routes.rb

@@ -340,22 +340,22 @@ Rails.application.routes.draw do
         end
       end
 
-      # namespace :crypto do
-      #   resources :deliveries, only: :create
+      namespace :crypto do
+        resources :deliveries, only: :create
 
-      #   namespace :keys do
-      #     resource :upload, only: [:create]
-      #     resource :query,  only: [:create]
-      #     resource :claim,  only: [:create]
-      #     resource :count,  only: [:show]
-      #   end
+        namespace :keys do
+          resource :upload, only: [:create]
+          resource :query,  only: [:create]
+          resource :claim,  only: [:create]
+          resource :count,  only: [:show]
+        end
 
-      #   resources :encrypted_messages, only: [:index] do
-      #     collection do
-      #       post :clear
-      #     end
-      #   end
-      # end
+        resources :encrypted_messages, only: [:index] do
+          collection do
+            post :clear
+          end
+        end
+      end
 
       resources :conversations, only: [:index, :destroy] do
         member do

config/webpack/rules/index.js

@@ -2,6 +2,7 @@ const babel = require('./babel');
 const css = require('./css');
 const file = require('./file');
 const nodeModules = require('./node_modules');
+const wasm = require('./wasm');
 
 // Webpack loaders are processed in reverse order
 // https://webpack.js.org/concepts/loaders/#loader-features
@@ -11,4 +12,5 @@ module.exports = {
   css,
   nodeModules,
   babel,
+  wasm,
 };

config/webpack/rules/wasm.js

@@ -0,0 +1,8 @@
+module.exports = {
+  test: /\.wasm$/,
+  type: "javascript/auto",
+  loader: "file-loader",
+  options: {
+    name: '[name]-[hash].[ext]'
+  }
+};

config/webpack/shared.js

@@ -109,5 +109,8 @@ module.exports = {
     // Called by http-link-header in an API we never use, increases
     // bundle size unnecessarily
     Buffer: false,
+
+    // Called by olm
+    fs: 'empty',
   },
 };

package.json

@@ -88,6 +88,7 @@
     "css-loader": "^3.6.0",
     "cssnano": "^4.1.10",
     "detect-passive-events": "^1.0.2",
+    "dexie": "^3.0.1",
     "dotenv": "^8.2.0",
     "emoji-mart": "Gargron/emoji-mart#build",
     "es6-symbol": "^3.1.3",
@@ -117,6 +118,7 @@
     "object-fit-images": "^3.2.3",
     "object.values": "^1.1.1",
     "offline-plugin": "^5.0.7",
+    "olm": "https://packages.matrix.org/npm/olm/olm-3.1.4.tgz",
     "path-complete-extname": "^1.0.0",
     "pg": "^6.4.0",
     "postcss-loader": "^3.0.0",

yarn.lock

@@ -3811,6 +3811,11 @@ detect-passive-events@^1.0.2:
   resolved "https://registry.yarnpkg.com/detect-passive-events/-/detect-passive-events-1.0.4.tgz#6ed477e6e5bceb79079735dcd357789d37f9a91a"
   integrity sha1-btR35uW863kHlzXc01d4nTf5qRo=
 
+dexie@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/dexie/-/dexie-3.0.1.tgz#faafeb94be0d5e18b25d700546a2c05725511cfc"
+  integrity sha512-/s4KzlaerQnCad/uY1ZNdFckTrbdMVhLlziYQzz62Ff9Ick1lHGomvTXNfwh4ApEZATyXRyVk5F6/y8UU84B0w==
+
 diff-sequences@^25.2.6:
   version "25.2.6"
   resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-25.2.6.tgz#5f467c00edd35352b7bca46d7927d60e687a76dd"
@@ -7658,6 +7663,10 @@ offline-plugin@^5.0.7:
     minimatch "^3.0.3"
     slash "^1.0.0"
 
+"olm@https://packages.matrix.org/npm/olm/olm-3.1.4.tgz":
+  version "3.1.4"
+  resolved "https://packages.matrix.org/npm/olm/olm-3.1.4.tgz#0f03128b7d3b2f614d2216409a1dfccca765fdb3"
+
 on-finished@~2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/on-finished/-/on-finished-2.3.0.tgz#20f1336481b083cd75337992a16971aa2d906947"