diff --git a/keyserver/src/database/migration-config.js b/keyserver/src/database/migration-config.js
index 4ea94d24a..1ff14c959 100644
--- a/keyserver/src/database/migration-config.js
+++ b/keyserver/src/database/migration-config.js
@@ -1,638 +1,663 @@
 // @flow
 
 import fs from 'fs';
 
 import bots from 'lib/facts/bots.js';
 import { policyTypes } from 'lib/facts/policies.js';
 import { messageTypes } from 'lib/types/message-types-enum.js';
 import { threadTypes } from 'lib/types/thread-types-enum.js';
 
 import { dbQuery, SQL } from '../database/database.js';
 import { processMessagesInDBForSearch } from '../database/search-utils.js';
+import { deleteThread } from '../deleters/thread-deleters.js';
 import { createScriptViewer } from '../session/scripts.js';
 import { updateRolesAndPermissionsForAllThreads } from '../updaters/thread-permission-updaters.js';
 import { updateThread } from '../updaters/thread-updaters.js';
 import { ensureUserCredentials } from '../user/checks.js';
 import { createPickledOlmAccount } from '../utils/olm-utils.js';
 
 const botViewer = createScriptViewer(bots.commbot.userID);
 
 const migrations: $ReadOnlyMap<number, () => Promise<mixed>> = new Map([
   [
     0,
     async () => {
       await makeSureBaseRoutePathExists('facts/commapp_url.json');
       await makeSureBaseRoutePathExists('facts/squadcal_url.json');
     },
   ],
   [
     1,
     async () => {
       try {
         await fs.promises.unlink('facts/url.json');
       } catch {}
     },
   ],
   [
     2,
     async () => {
       await fixBaseRoutePathForLocalhost('facts/commapp_url.json');
       await fixBaseRoutePathForLocalhost('facts/squadcal_url.json');
     },
   ],
 
   [3, updateRolesAndPermissionsForAllThreads],
   [
     4,
     async () => {
       await dbQuery(SQL`ALTER TABLE uploads ADD INDEX container (container)`);
     },
   ],
   [
     5,
     async () => {
       await dbQuery(SQL`
         ALTER TABLE cookies
           ADD device_id varchar(255) DEFAULT NULL,
           ADD public_key varchar(255) DEFAULT NULL,
           ADD social_proof varchar(255) DEFAULT NULL;
       `);
     },
   ],
   [
     7,
     async () => {
       await dbQuery(
         SQL`
           ALTER TABLE users
             DROP COLUMN IF EXISTS public_key,
             MODIFY hash char(60) COLLATE utf8mb4_bin DEFAULT NULL;
     
           ALTER TABLE sessions 
             DROP COLUMN IF EXISTS public_key;
         `,
         { multipleStatements: true },
       );
     },
   ],
   [
     8,
     async () => {
       await dbQuery(
         SQL`
           ALTER TABLE users
             ADD COLUMN IF NOT EXISTS ethereum_address char(42) DEFAULT NULL;
         `,
       );
     },
   ],
   [
     9,
     async () => {
       await dbQuery(
         SQL`
           ALTER TABLE messages
             ADD COLUMN IF NOT EXISTS target_message bigint(20) DEFAULT NULL;
 
           ALTER TABLE messages
             ADD INDEX target_message (target_message);
         `,
         { multipleStatements: true },
       );
     },
   ],
   [
     10,
     async () => {
       await dbQuery(SQL`
         CREATE TABLE IF NOT EXISTS policy_acknowledgments (
           user bigint(20) NOT NULL,
           policy varchar(255) NOT NULL,
           date bigint(20) NOT NULL,
           confirmed tinyint(1) UNSIGNED NOT NULL DEFAULT 0,
           PRIMARY KEY (user, policy)
         ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
       `);
     },
   ],
   [
     11,
     async () => {
       const time = Date.now();
       await dbQuery(SQL`
         INSERT IGNORE INTO policy_acknowledgments (policy, user, date, 
           confirmed)
         SELECT ${policyTypes.tosAndPrivacyPolicy}, id, ${time}, 1
         FROM users
       `);
     },
   ],
   [
     12,
     async () => {
       await dbQuery(SQL`
         CREATE TABLE IF NOT EXISTS siwe_nonces (
           nonce char(17) NOT NULL,
           creation_time bigint(20) NOT NULL,
           PRIMARY KEY (nonce)
         ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
       `);
     },
   ],
   [
     13,
     async () => {
       await Promise.all([
         writeSquadCalRoute('facts/squadcal_url.json'),
         moveToNonApacheConfig('facts/commapp_url.json', '/comm/'),
         moveToNonApacheConfig('facts/landing_url.json', '/commlanding/'),
       ]);
     },
   ],
   [
     14,
     async () => {
       await dbQuery(SQL`
         ALTER TABLE cookies MODIFY COLUMN social_proof mediumtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL;
       `);
     },
   ],
   [
     15,
     async () => {
       await dbQuery(
         SQL`
           ALTER TABLE uploads 
             ADD COLUMN IF NOT EXISTS thread bigint(20) DEFAULT NULL,
             ADD INDEX IF NOT EXISTS thread (thread);
           
           UPDATE uploads 
           SET thread = (
             SELECT thread FROM messages
             WHERE messages.id = uploads.container
           );
         `,
         { multipleStatements: true },
       );
     },
   ],
   [
     16,
     async () => {
       await dbQuery(
         SQL`
           ALTER TABLE cookies
             DROP COLUMN IF EXISTS public_key;
 
           ALTER TABLE cookies 
             ADD COLUMN IF NOT EXISTS signed_identity_keys mediumtext 
               CHARACTER SET utf8mb4 
               COLLATE utf8mb4_bin 
               DEFAULT NULL;
         `,
         { multipleStatements: true },
       );
     },
   ],
   [
     17,
     async () => {
       await dbQuery(
         SQL`
           ALTER TABLE cookies 
             DROP INDEX device_token,
             DROP INDEX user_device_token;
 
           ALTER TABLE cookies
             MODIFY device_token mediumtext 
               CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL,
             ADD UNIQUE KEY device_token (device_token(512)),
             ADD KEY user_device_token (user,device_token(512));
         `,
         { multipleStatements: true },
       );
     },
   ],
   [18, updateRolesAndPermissionsForAllThreads],
   [19, updateRolesAndPermissionsForAllThreads],
   [
     20,
     async () => {
       await dbQuery(SQL`
         ALTER TABLE threads
           ADD COLUMN IF NOT EXISTS avatar varchar(191)
             COLLATE utf8mb4_bin
             DEFAULT NULL;
       `);
     },
   ],
   [
     21,
     async () => {
       await dbQuery(SQL`
         ALTER TABLE reports
           DROP INDEX IF EXISTS user,
           ADD INDEX IF NOT EXISTS user_type_platform_creation_time
             (user, type, platform, creation_time);
       `);
     },
   ],
   [
     22,
     async () => {
       await dbQuery(
         SQL`
           ALTER TABLE cookies
             MODIFY user varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE entries
             MODIFY creator varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE focused
             MODIFY user varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE memberships
             MODIFY user varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE messages
             MODIFY user varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE notifications
             MODIFY user varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE reports
             MODIFY user varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE revisions
             MODIFY author varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE sessions
             MODIFY user varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE threads
             MODIFY creator varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE updates
             MODIFY user varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE uploads
             MODIFY uploader varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE users
             MODIFY id varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE relationships_undirected
             MODIFY user1 varchar(255) CHARSET latin1 COLLATE latin1_bin,
             MODIFY user2 varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE relationships_directed
             MODIFY user1 varchar(255) CHARSET latin1 COLLATE latin1_bin,
             MODIFY user2 varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE user_messages
             MODIFY recipient varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE settings
             MODIFY user varchar(255) CHARSET latin1 COLLATE latin1_bin;
           ALTER TABLE policy_acknowledgments
             MODIFY user varchar(255) CHARSET latin1 COLLATE latin1_bin;
         `,
         { multipleStatements: true },
       );
     },
   ],
   [23, updateRolesAndPermissionsForAllThreads],
   [24, updateRolesAndPermissionsForAllThreads],
   [
     25,
     async () => {
       await dbQuery(
         SQL`
           CREATE TABLE IF NOT EXISTS message_search (
             original_message_id bigint(20) NOT NULL,
             message_id bigint(20) NOT NULL,
             processed_content mediumtext COLLATE utf8mb4_bin
           ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
 
           ALTER TABLE message_search
             ADD PRIMARY KEY (original_message_id),
             ADD FULLTEXT INDEX processed_content (processed_content);
       `,
         { multipleStatements: true },
       );
     },
   ],
   [26, processMessagesInDBForSearch],
   [
     27,
     async () => {
       await dbQuery(SQL`
         ALTER TABLE messages
           ADD COLUMN IF NOT EXISTS pinned tinyint(1) UNSIGNED NOT NULL DEFAULT 0,
           ADD COLUMN IF NOT EXISTS pin_time bigint(20) DEFAULT NULL,
           ADD INDEX IF NOT EXISTS thread_pinned (thread, pinned);
       `);
     },
   ],
   [
     28,
     async () => {
       await dbQuery(SQL`
         ALTER TABLE threads
           ADD COLUMN IF NOT EXISTS pinned_count int UNSIGNED NOT NULL DEFAULT 0;
       `);
     },
   ],
   [29, updateRolesAndPermissionsForAllThreads],
   [
     30,
     async () => {
       await dbQuery(SQL`DROP TABLE versions;`);
     },
   ],
   [
     31,
     async () => {
       await dbQuery(
         SQL`
           CREATE TABLE IF NOT EXISTS invite_links (
             id bigint(20) NOT NULL,
             name varchar(255) CHARSET latin1 NOT NULL,
             \`primary\` tinyint(1) UNSIGNED NOT NULL DEFAULT 0,
             role bigint(20) NOT NULL,
             community bigint(20) NOT NULL,
             expiration_time bigint(20),
             limit_of_uses int UNSIGNED,
             number_of_uses int UNSIGNED NOT NULL DEFAULT 0
           ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
           ALTER TABLE invite_links
             ADD PRIMARY KEY (id),
             ADD UNIQUE KEY (name),
             ADD INDEX community_primary (community, \`primary\`);
         `,
         { multipleStatements: true },
       );
     },
   ],
   [
     32,
     async () => {
       await dbQuery(SQL`
         UPDATE messages
         SET target_message = JSON_VALUE(content, "$.sourceMessageID")
         WHERE type = ${messageTypes.SIDEBAR_SOURCE};
       `);
     },
   ],
   [
     33,
     async () => {
       await dbQuery(
         SQL`
           CREATE TABLE IF NOT EXISTS olm_sessions (
             cookie_id bigint(20) NOT NULL,
             is_content tinyint(1) NOT NULL,
             version bigint(20) NOT NULL,
             pickled_olm_session text 
               CHARACTER SET latin1 
               COLLATE latin1_bin NOT NULL
           ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_bin;
 
           ALTER TABLE olm_sessions
             ADD PRIMARY KEY (cookie_id, is_content);
         `,
         { multipleStatements: true },
       );
     },
   ],
   [
     34,
     async () => {
       await dbQuery(
         SQL`
           CREATE TABLE IF NOT EXISTS olm_accounts (
             is_content tinyint(1) NOT NULL,
             version bigint(20) NOT NULL,
             pickling_key text 
               CHARACTER SET latin1 
               COLLATE latin1_bin NOT NULL,
             pickled_olm_account text 
               CHARACTER SET latin1 
               COLLATE latin1_bin NOT NULL
           ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_bin;
 
           ALTER TABLE olm_accounts
             ADD PRIMARY KEY (is_content);
         `,
         { multipleStatements: true },
       );
     },
   ],
   [
     35,
     async () => {
       await createOlmAccounts();
     },
   ],
   [36, updateRolesAndPermissionsForAllThreads],
   [
     37,
     async () => {
       await dbQuery(
         SQL`
           DELETE FROM olm_accounts;
           DELETE FROM olm_sessions;
         `,
         { multipleStatements: true },
       );
       await createOlmAccounts();
     },
   ],
   [
     38,
     async () => {
       const [result] = await dbQuery(SQL`
         SELECT t.id
         FROM threads t
         INNER JOIN memberships m ON m.thread = t.id AND m.role > 0
         INNER JOIN users u ON u.id = m.user
         WHERE t.type = ${threadTypes.PRIVATE}
           AND t.name = u.ethereum_address
       `);
       const threadIDs = result.map(({ id }) => id.toString());
       while (threadIDs.length > 0) {
         // Batch 10 updateThread calls at a time
         const batch = threadIDs.splice(0, 10);
         await Promise.all(
           batch.map(threadID =>
             updateThread(
               botViewer,
               {
                 threadID,
                 changes: {
                   name: '',
                 },
               },
               {
                 silenceMessages: true,
                 ignorePermissions: true,
               },
             ),
           ),
         );
       }
     },
   ],
   [39, ensureUserCredentials],
   [
     40,
     // Tokens from identity service are 512 characters long
     () =>
       dbQuery(
         SQL`
           ALTER TABLE metadata
           MODIFY COLUMN data VARCHAR(1023)
         `,
       ),
   ],
   [
     41,
     () =>
       dbQuery(
         SQL`
           ALTER TABLE memberships
             DROP INDEX user,
             ADD KEY user_role_thread (user, role, thread)
         `,
       ),
   ],
   [
     42,
     async () => {
       await dbQuery(SQL`
         ALTER TABLE roles
         ADD UNIQUE KEY thread_name (thread, name);
       `);
     },
   ],
   [
     43,
     () =>
       dbQuery(
         SQL`
           UPDATE threads
           SET pinned_count = (
             SELECT COUNT(*) 
             FROM messages 
             WHERE messages.thread = threads.id 
               AND messages.pinned = 1
           )
         `,
       ),
   ],
+  [
+    44,
+    async () => {
+      const { SIDEBAR_SOURCE, TOGGLE_PIN } = messageTypes;
+      const [result] = await dbQuery(SQL`
+        SELECT m1.thread
+        FROM messages m1
+        LEFT JOIN messages m2
+          ON m2.id = m1.target_message
+        WHERE m1.type = ${SIDEBAR_SOURCE} AND m2.type = ${TOGGLE_PIN}
+      `);
+
+      const threadIDs = new Set();
+      for (const row of result) {
+        threadIDs.add(row.thread.toString());
+      }
+
+      await Promise.all(
+        [...threadIDs].map(threadID =>
+          deleteThread(botViewer, { threadID }, { ignorePermissions: true }),
+        ),
+      );
+    },
+  ],
 ]);
 const newDatabaseVersion: number = Math.max(...migrations.keys());
 
 async function writeJSONToFile(data: any, filePath: string): Promise<void> {
   console.warn(`updating ${filePath} to ${JSON.stringify(data)}`);
   const fileHandle = await fs.promises.open(filePath, 'w');
   await fileHandle.writeFile(JSON.stringify(data, null, '  '), 'utf8');
   await fileHandle.close();
 }
 
 async function makeSureBaseRoutePathExists(filePath: string): Promise<void> {
   let readFile, json;
   try {
     readFile = await fs.promises.open(filePath, 'r');
     const contents = await readFile.readFile('utf8');
     json = JSON.parse(contents);
   } catch {
     return;
   } finally {
     if (readFile) {
       await readFile.close();
     }
   }
   if (json.baseRoutePath) {
     return;
   }
   let baseRoutePath;
   if (json.baseDomain === 'http://localhost') {
     baseRoutePath = json.basePath;
   } else if (filePath.endsWith('commapp_url.json')) {
     baseRoutePath = '/commweb/';
   } else {
     baseRoutePath = '/';
   }
   const newJSON = { ...json, baseRoutePath };
   console.warn(`updating ${filePath} to ${JSON.stringify(newJSON)}`);
   await writeJSONToFile(newJSON, filePath);
 }
 
 async function fixBaseRoutePathForLocalhost(filePath: string): Promise<void> {
   let readFile, json;
   try {
     readFile = await fs.promises.open(filePath, 'r');
     const contents = await readFile.readFile('utf8');
     json = JSON.parse(contents);
   } catch {
     return;
   } finally {
     if (readFile) {
       await readFile.close();
     }
   }
   if (json.baseDomain !== 'http://localhost') {
     return;
   }
   const baseRoutePath = '/';
   json = { ...json, baseRoutePath };
   console.warn(`updating ${filePath} to ${JSON.stringify(json)}`);
   await writeJSONToFile(json, filePath);
 }
 
 async function moveToNonApacheConfig(
   filePath: string,
   routePath: string,
 ): Promise<void> {
   if (process.env.COMM_DATABASE_HOST) {
     return;
   }
   // Since the non-Apache config is so opinionated, just write expected config
   const newJSON = {
     baseDomain: 'http://localhost:3000',
     basePath: routePath,
     baseRoutePath: routePath,
     https: false,
     proxy: 'none',
   };
 
   await writeJSONToFile(newJSON, filePath);
 }
 
 async function writeSquadCalRoute(filePath: string): Promise<void> {
   if (process.env.COMM_DATABASE_HOST) {
     return;
   }
   // Since the non-Apache config is so opinionated, just write expected config
   const newJSON = {
     baseDomain: 'http://localhost:3000',
     basePath: '/comm/',
     baseRoutePath: '/',
     https: false,
     proxy: 'apache',
   };
 
   await writeJSONToFile(newJSON, filePath);
 }
 
 async function createOlmAccounts() {
   const [pickledContentAccount, pickledNotificationsAccount] =
     await Promise.all([createPickledOlmAccount(), createPickledOlmAccount()]);
 
   await dbQuery(
     SQL`
       INSERT INTO olm_accounts (is_content, version, 
         pickling_key, pickled_olm_account)
       VALUES
       (
         TRUE, 
         0, 
         ${pickledContentAccount.picklingKey}, 
         ${pickledContentAccount.pickledAccount}
       ),
       (
         FALSE, 
         0, 
         ${pickledNotificationsAccount.picklingKey}, 
         ${pickledNotificationsAccount.pickledAccount}
       );
     `,
   );
 }
 
 export { migrations, newDatabaseVersion, createOlmAccounts };
diff --git a/lib/types/thread-types.js b/lib/types/thread-types.js
index a3876c59f..3a52d6587 100644
--- a/lib/types/thread-types.js
+++ b/lib/types/thread-types.js
@@ -1,466 +1,466 @@
 // @flow
 
 import t, { type TInterface } from 'tcomb';
 
 import {
   type AvatarDBContent,
   type ClientAvatar,
   clientAvatarValidator,
   type UpdateUserAvatarRequest,
 } from './avatar-types.js';
 import type { Shape } from './core.js';
 import type { CalendarQuery } from './entry-types.js';
 import type { Media } from './media-types.js';
 import type {
   MessageTruncationStatuses,
   RawMessageInfo,
 } from './message-types.js';
 import {
   type ThreadSubscription,
   threadSubscriptionValidator,
 } from './subscription-types.js';
 import {
   type ThreadPermissionsInfo,
   threadPermissionsInfoValidator,
   type ThreadRolePermissionsBlob,
   threadRolePermissionsBlobValidator,
   type UserSurfacedPermission,
 } from './thread-permission-types.js';
 import { type ThreadType, threadTypeValidator } from './thread-types-enum.js';
 import type { ClientUpdateInfo, ServerUpdateInfo } from './update-types.js';
 import type { UserInfo, UserInfos } from './user-types.js';
 import {
   type ThreadEntity,
   threadEntityValidator,
 } from '../utils/entity-text.js';
 import { tID, tShape } from '../utils/validation-utils.js';
 
 export type MemberInfo = {
   +id: string,
   +role: ?string,
   +permissions: ThreadPermissionsInfo,
   +isSender: boolean,
 };
 const memberInfoValidator = tShape<MemberInfo>({
   id: t.String,
   role: t.maybe(tID),
   permissions: threadPermissionsInfoValidator,
   isSender: t.Boolean,
 });
 
 export type RelativeMemberInfo = {
   ...MemberInfo,
   +username: ?string,
   +isViewer: boolean,
 };
 const relativeMemberInfoValidator = tShape<RelativeMemberInfo>({
   ...memberInfoValidator.meta.props,
   username: t.maybe(t.String),
   isViewer: t.Boolean,
 });
 
 export type RoleInfo = {
   +id: string,
   +name: string,
   +permissions: ThreadRolePermissionsBlob,
   +isDefault: boolean,
 };
 const roleInfoValidator = tShape<RoleInfo>({
   id: tID,
   name: t.String,
   permissions: threadRolePermissionsBlobValidator,
   isDefault: t.Boolean,
 });
 
 export type ThreadCurrentUserInfo = {
   +role: ?string,
   +permissions: ThreadPermissionsInfo,
   +subscription: ThreadSubscription,
   +unread: ?boolean,
 };
 const threadCurrentUserInfoValidator = tShape<ThreadCurrentUserInfo>({
   role: t.maybe(tID),
   permissions: threadPermissionsInfoValidator,
   subscription: threadSubscriptionValidator,
   unread: t.maybe(t.Boolean),
 });
 
 export type RawThreadInfo = {
   +id: string,
   +type: ThreadType,
   +name: ?string,
   +avatar?: ?ClientAvatar,
   +description: ?string,
   +color: string, // hex, without "#" or "0x"
   +creationTime: number, // millisecond timestamp
   +parentThreadID: ?string,
   +containingThreadID: ?string,
   +community: ?string,
   +members: $ReadOnlyArray<MemberInfo>,
   +roles: { +[id: string]: RoleInfo },
   +currentUser: ThreadCurrentUserInfo,
   +sourceMessageID?: string,
   +repliesCount: number,
   +pinnedCount?: number,
 };
 export type RawThreadInfos = {
   +[id: string]: RawThreadInfo,
 };
 export const rawThreadInfoValidator: TInterface<RawThreadInfo> =
   tShape<RawThreadInfo>({
     id: tID,
     type: threadTypeValidator,
     name: t.maybe(t.String),
     avatar: t.maybe(clientAvatarValidator),
     description: t.maybe(t.String),
     color: t.String,
     creationTime: t.Number,
     parentThreadID: t.maybe(tID),
     containingThreadID: t.maybe(tID),
     community: t.maybe(tID),
     members: t.list(memberInfoValidator),
     roles: t.dict(tID, roleInfoValidator),
     currentUser: threadCurrentUserInfoValidator,
     sourceMessageID: t.maybe(tID),
     repliesCount: t.Number,
     pinnedCount: t.maybe(t.Number),
   });
 
 export type ThreadInfo = {
   +id: string,
   +type: ThreadType,
   +name: ?string,
   +uiName: string | ThreadEntity,
   +avatar?: ?ClientAvatar,
   +description: ?string,
   +color: string, // hex, without "#" or "0x"
   +creationTime: number, // millisecond timestamp
   +parentThreadID: ?string,
   +containingThreadID: ?string,
   +community: ?string,
   +members: $ReadOnlyArray<RelativeMemberInfo>,
   +roles: { +[id: string]: RoleInfo },
   +currentUser: ThreadCurrentUserInfo,
   +sourceMessageID?: string,
   +repliesCount: number,
   +pinnedCount?: number,
 };
 export const threadInfoValidator: TInterface<ThreadInfo> = tShape<ThreadInfo>({
   id: tID,
   type: threadTypeValidator,
   name: t.maybe(t.String),
   uiName: t.union([t.String, threadEntityValidator]),
   avatar: t.maybe(clientAvatarValidator),
   description: t.maybe(t.String),
   color: t.String,
   creationTime: t.Number,
   parentThreadID: t.maybe(tID),
   containingThreadID: t.maybe(tID),
   community: t.maybe(tID),
   members: t.list(relativeMemberInfoValidator),
   roles: t.dict(tID, roleInfoValidator),
   currentUser: threadCurrentUserInfoValidator,
   sourceMessageID: t.maybe(tID),
   repliesCount: t.Number,
   pinnedCount: t.maybe(t.Number),
 });
 
 export type ResolvedThreadInfo = {
   +id: string,
   +type: ThreadType,
   +name: ?string,
   +uiName: string,
   +avatar?: ?ClientAvatar,
   +description: ?string,
   +color: string, // hex, without "#" or "0x"
   +creationTime: number, // millisecond timestamp
   +parentThreadID: ?string,
   +containingThreadID: ?string,
   +community: ?string,
   +members: $ReadOnlyArray<RelativeMemberInfo>,
   +roles: { +[id: string]: RoleInfo },
   +currentUser: ThreadCurrentUserInfo,
   +sourceMessageID?: string,
   +repliesCount: number,
   +pinnedCount?: number,
 };
 
 export type ServerMemberInfo = {
   +id: string,
   +role: ?string,
   +permissions: ThreadPermissionsInfo,
   +subscription: ThreadSubscription,
   +unread: ?boolean,
   +isSender: boolean,
 };
 
 export type ServerThreadInfo = {
   +id: string,
   +type: ThreadType,
   +name: ?string,
   +avatar?: AvatarDBContent,
   +description: ?string,
   +color: string, // hex, without "#" or "0x"
   +creationTime: number, // millisecond timestamp
   +parentThreadID: ?string,
   +containingThreadID: ?string,
   +community: ?string,
   +depth: number,
   +members: $ReadOnlyArray<ServerMemberInfo>,
   +roles: { +[id: string]: RoleInfo },
   +sourceMessageID?: string,
   +repliesCount: number,
   +pinnedCount: number,
 };
 
 export type ThreadStore = {
   +threadInfos: { +[id: string]: RawThreadInfo },
 };
 export const threadStoreValidator: TInterface<ThreadStore> =
   tShape<ThreadStore>({
     threadInfos: t.dict(tID, rawThreadInfoValidator),
   });
 
 export type ClientDBThreadInfo = {
   +id: string,
   +type: number,
   +name: ?string,
   +avatar?: ?string,
   +description: ?string,
   +color: string,
   +creationTime: string,
   +parentThreadID: ?string,
   +containingThreadID: ?string,
   +community: ?string,
   +members: string,
   +roles: string,
   +currentUser: string,
   +sourceMessageID?: string,
   +repliesCount: number,
   +pinnedCount?: number,
 };
 
 export type ThreadDeletionRequest = {
   +threadID: string,
-  +accountPassword: ?string,
+  +accountPassword?: ?string,
 };
 
 export type RemoveMembersRequest = {
   +threadID: string,
   +memberIDs: $ReadOnlyArray<string>,
 };
 
 export type RoleChangeRequest = {
   +threadID: string,
   +memberIDs: $ReadOnlyArray<string>,
   +role: string,
 };
 
 export type ChangeThreadSettingsResult = {
   +updatesResult: {
     +newUpdates: $ReadOnlyArray<ServerUpdateInfo>,
   },
   +newMessageInfos: $ReadOnlyArray<RawMessageInfo>,
 };
 
 export type ChangeThreadSettingsPayload = {
   +threadID: string,
   +updatesResult: {
     +newUpdates: $ReadOnlyArray<ClientUpdateInfo>,
   },
   +newMessageInfos: $ReadOnlyArray<RawMessageInfo>,
 };
 
 export type LeaveThreadRequest = {
   +threadID: string,
 };
 export type LeaveThreadResult = {
   +updatesResult: {
     +newUpdates: $ReadOnlyArray<ServerUpdateInfo>,
   },
 };
 
 export type LeaveThreadPayload = {
   +updatesResult: {
     +newUpdates: $ReadOnlyArray<ClientUpdateInfo>,
   },
 };
 
 export type ThreadChanges = Shape<{
   +type: ThreadType,
   +name: string,
   +description: string,
   +color: string,
   +parentThreadID: ?string,
   +newMemberIDs: $ReadOnlyArray<string>,
   +avatar: UpdateUserAvatarRequest,
 }>;
 
 export type UpdateThreadRequest = {
   +threadID: string,
   +changes: ThreadChanges,
   +accountPassword?: empty,
 };
 
 export type BaseNewThreadRequest = {
   +id?: ?string,
   +name?: ?string,
   +description?: ?string,
   +color?: ?string,
   +parentThreadID?: ?string,
   +initialMemberIDs?: ?$ReadOnlyArray<string>,
   +ghostMemberIDs?: ?$ReadOnlyArray<string>,
 };
 type NewThreadRequest =
   | {
       +type: 3 | 4 | 6 | 7 | 8 | 9 | 10 | 11 | 12,
       ...BaseNewThreadRequest,
     }
   | {
       +type: 5,
       +sourceMessageID: string,
       ...BaseNewThreadRequest,
     };
 
 export type ClientNewThreadRequest = {
   ...NewThreadRequest,
   +calendarQuery: CalendarQuery,
 };
 export type ServerNewThreadRequest = {
   ...NewThreadRequest,
   +calendarQuery?: ?CalendarQuery,
 };
 
 export type NewThreadResponse = {
   +updatesResult: {
     +newUpdates: $ReadOnlyArray<ServerUpdateInfo>,
   },
   +newMessageInfos: $ReadOnlyArray<RawMessageInfo>,
   +userInfos: UserInfos,
   +newThreadID: string,
 };
 export type NewThreadResult = {
   +updatesResult: {
     +newUpdates: $ReadOnlyArray<ClientUpdateInfo>,
   },
   +newMessageInfos: $ReadOnlyArray<RawMessageInfo>,
   +userInfos: UserInfos,
   +newThreadID: string,
 };
 
 export type ServerThreadJoinRequest = {
   +threadID: string,
   +calendarQuery?: ?CalendarQuery,
   +inviteLinkSecret?: string,
 };
 export type ClientThreadJoinRequest = {
   +threadID: string,
   +calendarQuery: CalendarQuery,
   +inviteLinkSecret?: string,
 };
 export type ThreadJoinResult = {
   +updatesResult: {
     +newUpdates: $ReadOnlyArray<ServerUpdateInfo>,
   },
   +rawMessageInfos: $ReadOnlyArray<RawMessageInfo>,
   +truncationStatuses: MessageTruncationStatuses,
   +userInfos: UserInfos,
 };
 export type ThreadJoinPayload = {
   +updatesResult: {
     newUpdates: $ReadOnlyArray<ClientUpdateInfo>,
   },
   +rawMessageInfos: $ReadOnlyArray<RawMessageInfo>,
   +truncationStatuses: MessageTruncationStatuses,
   +userInfos: $ReadOnlyArray<UserInfo>,
 };
 
 export type ThreadFetchMediaResult = {
   +media: $ReadOnlyArray<Media>,
 };
 export type ThreadFetchMediaRequest = {
   +threadID: string,
   +limit: number,
   +offset: number,
 };
 
 export type SidebarInfo = {
   +threadInfo: ThreadInfo,
   +lastUpdatedTime: number,
   +mostRecentNonLocalMessage: ?string,
 };
 
 export type ToggleMessagePinRequest = {
   +messageID: string,
   +action: 'pin' | 'unpin',
 };
 
 export type ToggleMessagePinResult = {
   +newMessageInfos: $ReadOnlyArray<RawMessageInfo>,
   +threadID: string,
 };
 
 type CreateRoleAction = {
   +community: string,
   +name: string,
   +permissions: $ReadOnlyArray<UserSurfacedPermission>,
   +action: 'create_role',
 };
 
 type EditRoleAction = {
   +community: string,
   +existingRoleID: string,
   +name: string,
   +permissions: $ReadOnlyArray<UserSurfacedPermission>,
   +action: 'edit_role',
 };
 
 export type RoleModificationRequest = CreateRoleAction | EditRoleAction;
 
 export type RoleModificationResult = {
   +threadInfo: RawThreadInfo,
   +updatesResult: {
     +newUpdates: $ReadOnlyArray<ServerUpdateInfo>,
   },
 };
 
 export type RoleModificationPayload = {
   +threadInfo: RawThreadInfo,
   +updatesResult: {
     +newUpdates: $ReadOnlyArray<ClientUpdateInfo>,
   },
 };
 
 export type RoleDeletionRequest = {
   +community: string,
   +roleID: string,
 };
 
 export type RoleDeletionResult = {
   +threadInfo: RawThreadInfo,
   +updatesResult: {
     +newUpdates: $ReadOnlyArray<ServerUpdateInfo>,
   },
 };
 
 export type RoleDeletionPayload = {
   +threadInfo: RawThreadInfo,
   +updatesResult: {
     +newUpdates: $ReadOnlyArray<ClientUpdateInfo>,
   },
 };
 
 // We can show a max of 3 sidebars inline underneath their parent in the chat
 // tab. If there are more, we show a button that opens a modal to see the rest
 export const maxReadSidebars = 3;
 
 // We can show a max of 5 sidebars inline underneath their parent
 // in the chat tab if every one of the displayed sidebars is unread
 export const maxUnreadSidebars = 5;
 
 export type ThreadStoreThreadInfos = { +[id: string]: RawThreadInfo };
 
 export type ChatMentionCandidates = { +[id: string]: ResolvedThreadInfo };
 export type ChatMentionCandidatesObj = {
   +[id: string]: ChatMentionCandidates,
 };