diff --git a/lib/components/chat-mention-provider.react.js b/lib/components/chat-mention-provider.react.js
index 2daededbd..2bf89c110 100644
--- a/lib/components/chat-mention-provider.react.js
+++ b/lib/components/chat-mention-provider.react.js
@@ -1,236 +1,237 @@
 // @flow
 
 import * as React from 'react';
 
 import genesis from '../facts/genesis.js';
 import { threadInfoSelector } from '../selectors/thread-selectors.js';
 import SentencePrefixSearchIndex from '../shared/sentence-prefix-search-index.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import { threadTypes } from '../types/thread-types-enum.js';
 import type {
   ChatMentionCandidates,
   ChatMentionCandidatesObj,
   ResolvedThreadInfo,
   ThreadInfo,
 } from '../types/thread-types.js';
 import { useResolvedThreadInfosObj } from '../utils/entity-helpers.js';
 import { useSelector } from '../utils/redux-utils.js';
 
 type Props = {
   +children: React.Node,
 };
 export type ChatMentionContextType = {
   +getChatMentionSearchIndex: (
-    threadInfo: ThreadInfo,
+    threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   ) => SentencePrefixSearchIndex,
   +communityThreadIDForGenesisThreads: { +[id: string]: string },
   +chatMentionCandidatesObj: ChatMentionCandidatesObj,
 };
 
 const emptySearchIndex = new SentencePrefixSearchIndex();
 const ChatMentionContext: React.Context<?ChatMentionContextType> =
   React.createContext<?ChatMentionContextType>({
     getChatMentionSearchIndex: () => emptySearchIndex,
     communityThreadIDForGenesisThreads: {},
     chatMentionCandidatesObj: {},
   });
 
 function ChatMentionContextProvider(props: Props): React.Node {
   const { children } = props;
 
   const { communityThreadIDForGenesisThreads, chatMentionCandidatesObj } =
     useChatMentionCandidatesObjAndUtils();
   const searchIndices = useChatMentionSearchIndex(chatMentionCandidatesObj);
 
   const getChatMentionSearchIndex = React.useCallback(
-    (threadInfo: ThreadInfo) => {
+    (threadInfo: ThreadInfo | MinimallyEncodedThreadInfo) => {
       if (threadInfo.community === genesis.id) {
         return searchIndices[communityThreadIDForGenesisThreads[threadInfo.id]];
       }
       return searchIndices[threadInfo.community ?? threadInfo.id];
     },
     [communityThreadIDForGenesisThreads, searchIndices],
   );
 
   const value = React.useMemo(
     () => ({
       getChatMentionSearchIndex,
       communityThreadIDForGenesisThreads,
       chatMentionCandidatesObj,
     }),
     [
       getChatMentionSearchIndex,
       communityThreadIDForGenesisThreads,
       chatMentionCandidatesObj,
     ],
   );
 
   return (
     <ChatMentionContext.Provider value={value}>
       {children}
     </ChatMentionContext.Provider>
   );
 }
 
 function getChatMentionCandidates(threadInfos: {
   +[id: string]: ResolvedThreadInfo,
 }): {
   chatMentionCandidatesObj: ChatMentionCandidatesObj,
   communityThreadIDForGenesisThreads: { +[id: string]: string },
 } {
   const result = {};
   const visitedGenesisThreads = new Set();
   const communityThreadIDForGenesisThreads = {};
   for (const currentThreadID in threadInfos) {
     const currentThreadInfo = threadInfos[currentThreadID];
     const { community: currentThreadCommunity } = currentThreadInfo;
     if (!currentThreadCommunity) {
       if (!result[currentThreadID]) {
         result[currentThreadID] = { [currentThreadID]: currentThreadInfo };
       }
       continue;
     }
     if (!result[currentThreadCommunity]) {
       result[currentThreadCommunity] = {
         [currentThreadCommunity]: threadInfos[currentThreadCommunity],
       };
     }
     // Handle GENESIS community case: mentioning inside GENESIS should only
     // show chats and threads inside the top level that is below GENESIS.
     if (threadInfos[currentThreadCommunity].type === threadTypes.GENESIS) {
       if (visitedGenesisThreads.has(currentThreadID)) {
         continue;
       }
       const threadTraversePath = [currentThreadInfo];
       visitedGenesisThreads.add(currentThreadID);
       let currentlySelectedThreadID = currentThreadInfo.parentThreadID;
       while (currentlySelectedThreadID) {
         const currentlySelectedThreadInfo =
           threadInfos[currentlySelectedThreadID];
         if (
           visitedGenesisThreads.has(currentlySelectedThreadID) ||
           !currentlySelectedThreadInfo ||
           currentlySelectedThreadInfo.type === threadTypes.GENESIS
         ) {
           break;
         }
         threadTraversePath.push(currentlySelectedThreadInfo);
         visitedGenesisThreads.add(currentlySelectedThreadID);
         currentlySelectedThreadID = currentlySelectedThreadInfo.parentThreadID;
       }
       const lastThreadInTraversePath =
         threadTraversePath[threadTraversePath.length - 1];
       let lastThreadInTraversePathParentID;
       if (lastThreadInTraversePath.parentThreadID) {
         lastThreadInTraversePathParentID = threadInfos[
           lastThreadInTraversePath.parentThreadID
         ]
           ? lastThreadInTraversePath.parentThreadID
           : lastThreadInTraversePath.id;
       } else {
         lastThreadInTraversePathParentID = lastThreadInTraversePath.id;
       }
       if (
         threadInfos[lastThreadInTraversePathParentID].type ===
         threadTypes.GENESIS
       ) {
         if (!result[lastThreadInTraversePath.id]) {
           result[lastThreadInTraversePath.id] = {};
         }
         for (const threadInfo of threadTraversePath) {
           result[lastThreadInTraversePath.id][threadInfo.id] = threadInfo;
           communityThreadIDForGenesisThreads[threadInfo.id] =
             lastThreadInTraversePath.id;
         }
         if (
           lastThreadInTraversePath.type !== threadTypes.PERSONAL &&
           lastThreadInTraversePath.type !== threadTypes.PRIVATE
         ) {
           result[genesis.id][lastThreadInTraversePath.id] =
             lastThreadInTraversePath;
         }
       } else {
         if (
           !communityThreadIDForGenesisThreads[lastThreadInTraversePathParentID]
         ) {
           result[lastThreadInTraversePathParentID] = {};
           communityThreadIDForGenesisThreads[lastThreadInTraversePathParentID] =
             lastThreadInTraversePathParentID;
         }
         const lastThreadInTraversePathParentCommunityThreadID =
           communityThreadIDForGenesisThreads[lastThreadInTraversePathParentID];
         for (const threadInfo of threadTraversePath) {
           result[lastThreadInTraversePathParentCommunityThreadID][
             threadInfo.id
           ] = threadInfo;
           communityThreadIDForGenesisThreads[threadInfo.id] =
             lastThreadInTraversePathParentCommunityThreadID;
         }
       }
       continue;
     }
     result[currentThreadCommunity][currentThreadID] = currentThreadInfo;
   }
   return {
     chatMentionCandidatesObj: result,
     communityThreadIDForGenesisThreads,
   };
 }
 
 // Without allAtOnce, useChatMentionCandidatesObjAndUtils is very expensive.
 // useResolvedThreadInfosObj would trigger its recalculation for each ENS name
 // as it streams in, but we would prefer to trigger its recaculation just once
 // for every update of the underlying Redux data.
 const useResolvedThreadInfosObjOptions = { allAtOnce: true };
 
 function useChatMentionCandidatesObjAndUtils(): {
   chatMentionCandidatesObj: ChatMentionCandidatesObj,
   resolvedThreadInfos: ChatMentionCandidates,
   communityThreadIDForGenesisThreads: { +[id: string]: string },
 } {
   const threadInfos = useSelector(threadInfoSelector);
   const resolvedThreadInfos = useResolvedThreadInfosObj(
     threadInfos,
     useResolvedThreadInfosObjOptions,
   );
   const { chatMentionCandidatesObj, communityThreadIDForGenesisThreads } =
     React.useMemo(
       () => getChatMentionCandidates(resolvedThreadInfos),
       [resolvedThreadInfos],
     );
   return {
     chatMentionCandidatesObj,
     resolvedThreadInfos,
     communityThreadIDForGenesisThreads,
   };
 }
 
 function useChatMentionSearchIndex(
   chatMentionCandidatesObj: ChatMentionCandidatesObj,
 ): {
   +[id: string]: SentencePrefixSearchIndex,
 } {
   return React.useMemo(() => {
     const result = {};
     for (const communityThreadID in chatMentionCandidatesObj) {
       const searchIndex = new SentencePrefixSearchIndex();
       const searchIndexEntries = [];
       for (const threadID in chatMentionCandidatesObj[communityThreadID]) {
         searchIndexEntries.push({
           id: threadID,
           uiName: chatMentionCandidatesObj[communityThreadID][threadID].uiName,
         });
       }
       // Sort the keys so that the order of the search result is consistent
       searchIndexEntries.sort(({ uiName: uiNameA }, { uiName: uiNameB }) =>
         uiNameA.localeCompare(uiNameB),
       );
       for (const { id, uiName } of searchIndexEntries) {
         searchIndex.addEntry(id, uiName);
       }
       result[communityThreadID] = searchIndex;
     }
     return result;
   }, [chatMentionCandidatesObj]);
 }
 
 export { ChatMentionContextProvider, ChatMentionContext };
diff --git a/lib/hooks/chat-mention-hooks.js b/lib/hooks/chat-mention-hooks.js
index d33a09856..44c629235 100644
--- a/lib/hooks/chat-mention-hooks.js
+++ b/lib/hooks/chat-mention-hooks.js
@@ -1,47 +1,48 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
 
 import {
   ChatMentionContext,
   type ChatMentionContextType,
 } from '../components/chat-mention-provider.react.js';
 import genesis from '../facts/genesis.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import type {
   ChatMentionCandidates,
   ThreadInfo,
 } from '../types/thread-types.js';
 
 function useChatMentionContext(): ChatMentionContextType {
   const context = React.useContext(ChatMentionContext);
   invariant(context, 'ChatMentionContext not found');
 
   return context;
 }
 
 function useThreadChatMentionCandidates(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 ): ChatMentionCandidates {
   const { communityThreadIDForGenesisThreads, chatMentionCandidatesObj } =
     useChatMentionContext();
   return React.useMemo(() => {
     const communityID =
       threadInfo.community === genesis.id
         ? communityThreadIDForGenesisThreads[threadInfo.id]
         : threadInfo.community ?? threadInfo.id;
     const allChatsWithinCommunity = chatMentionCandidatesObj[communityID];
     if (!allChatsWithinCommunity) {
       return {};
     }
     const { [threadInfo.id]: _, ...result } = allChatsWithinCommunity;
     return result;
   }, [
     chatMentionCandidatesObj,
     communityThreadIDForGenesisThreads,
     threadInfo.community,
     threadInfo.id,
   ]);
 }
 
 export { useThreadChatMentionCandidates, useChatMentionContext };
diff --git a/lib/hooks/child-threads.js b/lib/hooks/child-threads.js
index 7bbcbbfda..464c823f2 100644
--- a/lib/hooks/child-threads.js
+++ b/lib/hooks/child-threads.js
@@ -1,116 +1,117 @@
 // @flow
 
 import * as React from 'react';
 
 import {
   useFetchSingleMostRecentMessagesFromThreads,
   fetchSingleMostRecentMessagesFromThreadsActionTypes,
 } from '../actions/message-actions.js';
 import {
   useFilteredChatListData,
   type ChatThreadItem,
 } from '../selectors/chat-selectors.js';
 import { useGlobalThreadSearchIndex } from '../selectors/nav-selectors.js';
 import { childThreadInfos } from '../selectors/thread-selectors.js';
 import { threadInChatList } from '../shared/thread-utils.js';
 import threadWatcher from '../shared/thread-watcher.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import type { ThreadInfo } from '../types/thread-types.js';
 import { useDispatchActionPromise } from '../utils/action-utils.js';
 import { useSelector } from '../utils/redux-utils.js';
 
 type ThreadFilter = {
-  +predicate?: (thread: ThreadInfo) => boolean,
+  +predicate?: (thread: ThreadInfo | MinimallyEncodedThreadInfo) => boolean,
   +searchText?: string,
 };
 
 function useFilteredChildThreads(
   threadID: string,
   filter?: ThreadFilter,
 ): $ReadOnlyArray<ChatThreadItem> {
   const defaultPredicate = React.useCallback(() => true, []);
   const { predicate = defaultPredicate, searchText = '' } = filter ?? {};
   const childThreads = useSelector(state => childThreadInfos(state)[threadID]);
   const subchannelIDs = React.useMemo(() => {
     if (!childThreads) {
       return new Set();
     }
     return new Set(
       childThreads.filter(predicate).map(threadInfo => threadInfo.id),
     );
   }, [childThreads, predicate]);
 
   const filterSubchannels = React.useCallback(
     thread => subchannelIDs.has(thread?.id),
     [subchannelIDs],
   );
   const allSubchannelsList = useFilteredChatListData(filterSubchannels);
 
   const searchIndex = useGlobalThreadSearchIndex();
 
   const searchResultIDs = React.useMemo(
     () => searchIndex.getSearchResults(searchText),
     [searchIndex, searchText],
   );
 
   const searchTextExists = !!searchText.length;
 
   const subchannelIDsNotInChatList = React.useMemo(
     () =>
       new Set(
         allSubchannelsList
           .filter(item => !threadInChatList(item.threadInfo))
           .map(item => item.threadInfo.id),
       ),
     [allSubchannelsList],
   );
 
   React.useEffect(() => {
     if (!subchannelIDsNotInChatList.size) {
       return undefined;
     }
     subchannelIDsNotInChatList.forEach(tID => threadWatcher.watchID(tID));
 
     return () =>
       subchannelIDsNotInChatList.forEach(tID => threadWatcher.removeID(tID));
   }, [subchannelIDsNotInChatList]);
 
   const filteredSubchannelsChatList = React.useMemo(() => {
     if (!searchTextExists) {
       return allSubchannelsList;
     }
     return allSubchannelsList.filter(item =>
       searchResultIDs.includes(item.threadInfo.id),
     );
   }, [allSubchannelsList, searchResultIDs, searchTextExists]);
 
   const threadIDsWithNoMessages = React.useMemo(
     () =>
       new Set(
         filteredSubchannelsChatList
           .filter(item => !item.mostRecentMessageInfo)
           .map(item => item.threadInfo.id),
       ),
     [filteredSubchannelsChatList],
   );
   const dispatchActionPromise = useDispatchActionPromise();
   const fetchSingleMostRecentMessages =
     useFetchSingleMostRecentMessagesFromThreads();
 
   React.useEffect(() => {
     if (!threadIDsWithNoMessages.size) {
       return;
     }
     dispatchActionPromise(
       fetchSingleMostRecentMessagesFromThreadsActionTypes,
       fetchSingleMostRecentMessages(Array.from(threadIDsWithNoMessages)),
     );
   }, [
     threadIDsWithNoMessages,
     fetchSingleMostRecentMessages,
     dispatchActionPromise,
   ]);
 
   return filteredSubchannelsChatList;
 }
 
 export { useFilteredChildThreads };
diff --git a/lib/hooks/promote-sidebar.react.js b/lib/hooks/promote-sidebar.react.js
index c38316ce1..d27f16f58 100644
--- a/lib/hooks/promote-sidebar.react.js
+++ b/lib/hooks/promote-sidebar.react.js
@@ -1,94 +1,96 @@
 // @flow
 
 import * as React from 'react';
 
 import {
   changeThreadSettingsActionTypes,
   useChangeThreadSettings,
 } from '../actions/thread-actions.js';
 import { createLoadingStatusSelector } from '../selectors/loading-selectors.js';
 import { threadInfoSelector } from '../selectors/thread-selectors.js';
 import {
   threadHasPermission,
   threadIsSidebar,
 } from '../shared/thread-utils.js';
 import type { LoadingStatus } from '../types/loading-types.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import { threadPermissions } from '../types/thread-permission-types.js';
 import { threadTypes } from '../types/thread-types-enum.js';
 import { type ThreadInfo } from '../types/thread-types.js';
 import { useDispatchActionPromise } from '../utils/action-utils.js';
 import { useSelector } from '../utils/redux-utils.js';
 
 function canPromoteSidebar(
-  sidebarThreadInfo: ThreadInfo,
-  parentThreadInfo: ?ThreadInfo,
+  sidebarThreadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
+  parentThreadInfo: ?ThreadInfo | ?MinimallyEncodedThreadInfo,
 ): boolean {
   if (!threadIsSidebar(sidebarThreadInfo)) {
     return false;
   }
 
   const canChangeThreadType = threadHasPermission(
     sidebarThreadInfo,
     threadPermissions.EDIT_PERMISSIONS,
   );
   const canCreateSubchannelsInParent = threadHasPermission(
     parentThreadInfo,
     threadPermissions.CREATE_SUBCHANNELS,
   );
   return canChangeThreadType && canCreateSubchannelsInParent;
 }
 
 type PromoteSidebarType = {
   +onPromoteSidebar: () => void,
   +loading: LoadingStatus,
   +canPromoteSidebar: boolean,
 };
 
 function usePromoteSidebar(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   onError?: () => mixed,
 ): PromoteSidebarType {
   const dispatchActionPromise = useDispatchActionPromise();
   const callChangeThreadSettings = useChangeThreadSettings();
   const loadingStatusSelector = createLoadingStatusSelector(
     changeThreadSettingsActionTypes,
   );
   const loadingStatus = useSelector(loadingStatusSelector);
 
   const { parentThreadID } = threadInfo;
-  const parentThreadInfo: ?ThreadInfo = useSelector(state =>
-    parentThreadID ? threadInfoSelector(state)[parentThreadID] : null,
-  );
+  const parentThreadInfo: ?ThreadInfo | ?MinimallyEncodedThreadInfo =
+    useSelector(state =>
+      parentThreadID ? threadInfoSelector(state)[parentThreadID] : null,
+    );
 
   const canPromote = canPromoteSidebar(threadInfo, parentThreadInfo);
 
   const onClick = React.useCallback(() => {
     try {
       dispatchActionPromise(
         changeThreadSettingsActionTypes,
         (async () => {
           return await callChangeThreadSettings({
             threadID: threadInfo.id,
             changes: { type: threadTypes.COMMUNITY_OPEN_SUBTHREAD },
           });
         })(),
       );
     } catch (e) {
       onError?.();
       throw e;
     }
   }, [threadInfo.id, callChangeThreadSettings, dispatchActionPromise, onError]);
 
   const returnValues = React.useMemo(
     () => ({
       onPromoteSidebar: onClick,
       loading: loadingStatus,
       canPromoteSidebar: canPromote,
     }),
     [onClick, loadingStatus, canPromote],
   );
 
   return returnValues;
 }
 
 export { usePromoteSidebar, canPromoteSidebar };
diff --git a/lib/hooks/relationship-prompt.js b/lib/hooks/relationship-prompt.js
index 6fc04810a..b34db2883 100644
--- a/lib/hooks/relationship-prompt.js
+++ b/lib/hooks/relationship-prompt.js
@@ -1,127 +1,128 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
 import { useSelector } from 'react-redux';
 
 import {
   updateRelationships as serverUpdateRelationships,
   updateRelationshipsActionTypes,
 } from '../actions/relationship-actions.js';
 import { getSingleOtherUser } from '../shared/thread-utils.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import {
   type RelationshipAction,
   relationshipActions,
 } from '../types/relationship-types.js';
 import type { ThreadInfo } from '../types/thread-types.js';
 import type { UserInfo } from '../types/user-types.js';
 import {
   useDispatchActionPromise,
   useServerCall,
 } from '../utils/action-utils.js';
 
 type RelationshipCallbacks = {
   +blockUser: () => void,
   +unblockUser: () => void,
   +friendUser: () => void,
   +unfriendUser: () => void,
 };
 
 type RelationshipPromptData = {
   +otherUserInfo: ?UserInfo,
   +callbacks: RelationshipCallbacks,
 };
 
 function useRelationshipPrompt(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   onErrorCallback?: () => void,
   pendingPersonalThreadUserInfo?: ?UserInfo,
 ): RelationshipPromptData {
   // We're fetching the info from state because we need the most recent
   // relationship status. Additionally, member info does not contain info
   // about relationship.
   const otherUserInfo = useSelector(state => {
     const otherUserID =
       getSingleOtherUser(threadInfo, state.currentUserInfo?.id) ??
       pendingPersonalThreadUserInfo?.id;
     const { userInfos } = state.userStore;
     return otherUserID && userInfos[otherUserID]
       ? userInfos[otherUserID]
       : pendingPersonalThreadUserInfo;
   });
 
   const callbacks = useRelationshipCallbacks(
     otherUserInfo?.id,
     onErrorCallback,
   );
 
   return React.useMemo(
     () => ({
       otherUserInfo,
       callbacks,
     }),
     [callbacks, otherUserInfo],
   );
 }
 
 function useRelationshipCallbacks(
   otherUserID?: string,
   onErrorCallback?: () => void,
 ): RelationshipCallbacks {
   const callUpdateRelationships = useServerCall(serverUpdateRelationships);
   const updateRelationship = React.useCallback(
     async (action: RelationshipAction) => {
       try {
         invariant(otherUserID, 'Other user info id should be present');
         return await callUpdateRelationships({
           action,
           userIDs: [otherUserID],
         });
       } catch (e) {
         onErrorCallback?.();
         throw e;
       }
     },
     [callUpdateRelationships, onErrorCallback, otherUserID],
   );
 
   const dispatchActionPromise = useDispatchActionPromise();
   const onButtonPress = React.useCallback(
     (action: RelationshipAction) => {
       dispatchActionPromise(
         updateRelationshipsActionTypes,
         updateRelationship(action),
       );
     },
     [dispatchActionPromise, updateRelationship],
   );
 
   const blockUser = React.useCallback(
     () => onButtonPress(relationshipActions.BLOCK),
     [onButtonPress],
   );
   const unblockUser = React.useCallback(
     () => onButtonPress(relationshipActions.UNBLOCK),
     [onButtonPress],
   );
   const friendUser = React.useCallback(
     () => onButtonPress(relationshipActions.FRIEND),
     [onButtonPress],
   );
   const unfriendUser = React.useCallback(
     () => onButtonPress(relationshipActions.UNFRIEND),
     [onButtonPress],
   );
 
   return React.useMemo(
     () => ({
       blockUser,
       unblockUser,
       friendUser,
       unfriendUser,
     }),
     [blockUser, friendUser, unblockUser, unfriendUser],
   );
 }
 
 export { useRelationshipPrompt, useRelationshipCallbacks };
diff --git a/lib/hooks/search-threads.js b/lib/hooks/search-threads.js
index 9540eaef4..b35ab148d 100644
--- a/lib/hooks/search-threads.js
+++ b/lib/hooks/search-threads.js
@@ -1,114 +1,124 @@
 // @flow
 
 import * as React from 'react';
 
 import {
   type ChatThreadItem,
   useFilteredChatListData,
 } from '../selectors/chat-selectors.js';
 import { useThreadSearchIndex } from '../selectors/nav-selectors.js';
 import { sidebarInfoSelector } from '../selectors/thread-selectors.js';
 import { threadIsChannel } from '../shared/thread-utils.js';
 import type { SetState } from '../types/hook-types.js';
+import type {
+  MinimallyEncodedRawThreadInfo,
+  MinimallyEncodedThreadInfo,
+} from '../types/minimally-encoded-thread-permissions-types.js';
 import type {
   SidebarInfo,
   ThreadInfo,
   RawThreadInfo,
 } from '../types/thread-types.js';
 import { useSelector } from '../utils/redux-utils.js';
 
 export type ThreadSearchState = {
   +text: string,
   +results: $ReadOnlySet<string>,
 };
 
 type SearchThreadsResult<U> = {
   +listData: $ReadOnlyArray<U>,
   +searchState: ThreadSearchState,
   +setSearchState: SetState<ThreadSearchState>,
   +onChangeSearchInputText: (text: string) => mixed,
   +clearQuery: (event: SyntheticEvent<HTMLAnchorElement>) => void,
 };
 
 function useSearchThreads<U: SidebarInfo | ChatThreadItem>(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   childThreadInfos: $ReadOnlyArray<U>,
 ): SearchThreadsResult<U> {
   const [searchState, setSearchState] = React.useState({
     text: '',
     results: new Set<string>(),
   });
 
   const listData = React.useMemo(() => {
     if (!searchState.text) {
       return childThreadInfos;
     }
     return childThreadInfos.filter(thread =>
       searchState.results.has(thread.threadInfo.id),
     );
   }, [childThreadInfos, searchState]);
 
   const justThreadInfos = React.useMemo(
     () => childThreadInfos.map(childThreadInfo => childThreadInfo.threadInfo),
     [childThreadInfos],
   );
   const searchIndex = useThreadSearchIndex(justThreadInfos);
 
   const onChangeSearchInputText = React.useCallback(
     (text: string) => {
       setSearchState({
         text,
         results: new Set(searchIndex.getSearchResults(text)),
       });
     },
     [searchIndex, setSearchState],
   );
 
   const clearQuery = React.useCallback(
     (event: SyntheticEvent<HTMLAnchorElement>) => {
       event.preventDefault();
       setSearchState({ text: '', results: new Set() });
     },
     [setSearchState],
   );
 
   return React.useMemo(
     () => ({
       listData,
       searchState,
       setSearchState,
       onChangeSearchInputText,
       clearQuery,
     }),
     [
       listData,
       setSearchState,
       searchState,
       onChangeSearchInputText,
       clearQuery,
     ],
   );
 }
 
 function useSearchSidebars(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 ): SearchThreadsResult<SidebarInfo> {
   const childThreadInfos = useSelector(
     state => sidebarInfoSelector(state)[threadInfo.id] ?? [],
   );
   return useSearchThreads(threadInfo, childThreadInfos);
 }
 
 function useSearchSubchannels(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 ): SearchThreadsResult<ChatThreadItem> {
   const filterFunc = React.useCallback(
-    (thread: ?(ThreadInfo | RawThreadInfo)) =>
-      threadIsChannel(thread) && thread?.parentThreadID === threadInfo.id,
+    (
+      thread: ?(
+        | ThreadInfo
+        | RawThreadInfo
+        | MinimallyEncodedThreadInfo
+        | MinimallyEncodedRawThreadInfo
+      ),
+    ) => threadIsChannel(thread) && thread?.parentThreadID === threadInfo.id,
     [threadInfo.id],
   );
   const childThreadInfos = useFilteredChatListData(filterFunc);
   return useSearchThreads(threadInfo, childThreadInfos);
 }
 
 export { useSearchSubchannels, useSearchSidebars };
diff --git a/lib/hooks/toggle-unread-status.js b/lib/hooks/toggle-unread-status.js
index dad5cf202..3adfeda3e 100644
--- a/lib/hooks/toggle-unread-status.js
+++ b/lib/hooks/toggle-unread-status.js
@@ -1,54 +1,55 @@
 // @flow
 
 import * as React from 'react';
 
 import {
   useSetThreadUnreadStatus,
   setThreadUnreadStatusActionTypes,
 } from '../actions/activity-actions.js';
 import type {
   SetThreadUnreadStatusPayload,
   SetThreadUnreadStatusRequest,
 } from '../types/activity-types.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import type { ThreadInfo } from '../types/thread-types.js';
 import { useDispatchActionPromise } from '../utils/action-utils.js';
 
 function useToggleUnreadStatus(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   mostRecentNonLocalMessage: ?string,
   afterAction: () => void,
 ): () => void {
   const dispatchActionPromise = useDispatchActionPromise();
   const { currentUser } = threadInfo;
   const boundSetThreadUnreadStatus: (
     request: SetThreadUnreadStatusRequest,
   ) => Promise<SetThreadUnreadStatusPayload> = useSetThreadUnreadStatus();
   const toggleUnreadStatus = React.useCallback(() => {
     const request = {
       threadID: threadInfo.id,
       unread: !currentUser.unread,
       latestMessage: mostRecentNonLocalMessage,
     };
     dispatchActionPromise(
       setThreadUnreadStatusActionTypes,
       boundSetThreadUnreadStatus(request),
       undefined,
       ({
         threadID: threadInfo.id,
         unread: !currentUser.unread,
       }: { +threadID: string, +unread: boolean }),
     );
     afterAction();
   }, [
     threadInfo.id,
     currentUser.unread,
     mostRecentNonLocalMessage,
     dispatchActionPromise,
     afterAction,
     boundSetThreadUnreadStatus,
   ]);
 
   return toggleUnreadStatus;
 }
 
 export default useToggleUnreadStatus;
diff --git a/lib/selectors/chat-selectors.js b/lib/selectors/chat-selectors.js
index e1e6ad848..201a15bfc 100644
--- a/lib/selectors/chat-selectors.js
+++ b/lib/selectors/chat-selectors.js
@@ -1,699 +1,717 @@
 // @flow
 
 import invariant from 'invariant';
 import _filter from 'lodash/fp/filter.js';
 import _flow from 'lodash/fp/flow.js';
 import _map from 'lodash/fp/map.js';
 import _orderBy from 'lodash/fp/orderBy.js';
 import * as React from 'react';
 import { useSelector } from 'react-redux';
 import { createSelector } from 'reselect';
 import { createObjectSelector } from 'reselect-map';
 
 import {
   threadInfoSelector,
   sidebarInfoSelector,
   threadInfoFromSourceMessageIDSelector,
 } from './thread-selectors.js';
 import {
   messageKey,
   robotextForMessageInfo,
   createMessageInfo,
   getMostRecentNonLocalMessageID,
   sortMessageInfoList,
 } from '../shared/message-utils.js';
 import {
   threadIsPending,
   threadIsTopLevel,
   threadInChatList,
 } from '../shared/thread-utils.js';
 import { messageTypes } from '../types/message-types-enum.js';
 import {
   type MessageInfo,
   type MessageStore,
   type ComposableMessageInfo,
   type RobotextMessageInfo,
   type LocalMessageInfo,
   isComposableMessageType,
 } from '../types/message-types.js';
+import type {
+  MinimallyEncodedRawThreadInfo,
+  MinimallyEncodedThreadInfo,
+} from '../types/minimally-encoded-thread-permissions-types.js';
 import type { BaseAppState } from '../types/redux-types.js';
 import { threadTypes } from '../types/thread-types-enum.js';
 import {
   type ThreadInfo,
   type RawThreadInfo,
   type SidebarInfo,
   maxReadSidebars,
   maxUnreadSidebars,
 } from '../types/thread-types.js';
 import type {
   UserInfo,
   AccountUserInfo,
   RelativeUserInfo,
 } from '../types/user-types.js';
 import { threeDays } from '../utils/date-utils.js';
 import type { EntityText } from '../utils/entity-text.js';
 import memoize2 from '../utils/memoize.js';
 
 export type SidebarItem =
   | {
       ...SidebarInfo,
       +type: 'sidebar',
     }
   | {
       +type: 'seeMore',
       +unread: boolean,
     }
   | { +type: 'spacer' };
 
 export type ChatThreadItem = {
   +type: 'chatThreadItem',
   +threadInfo: ThreadInfo,
   +mostRecentMessageInfo: ?MessageInfo,
   +mostRecentNonLocalMessage: ?string,
   +lastUpdatedTime: number,
   +lastUpdatedTimeIncludingSidebars: number,
   +sidebars: $ReadOnlyArray<SidebarItem>,
   +pendingPersonalThreadUserInfo?: UserInfo,
 };
 
 const messageInfoSelector: (state: BaseAppState<>) => {
   +[id: string]: ?MessageInfo,
 } = createObjectSelector(
   (state: BaseAppState<>) => state.messageStore.messages,
   (state: BaseAppState<>) => state.currentUserInfo && state.currentUserInfo.id,
   (state: BaseAppState<>) => state.userStore.userInfos,
   threadInfoSelector,
   createMessageInfo,
 );
 
 function isEmptyMediaMessage(messageInfo: MessageInfo): boolean {
   return (
     (messageInfo.type === messageTypes.MULTIMEDIA ||
       messageInfo.type === messageTypes.IMAGES) &&
     messageInfo.media.length === 0
   );
 }
 
 function getMostRecentMessageInfo(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   messageStore: MessageStore,
   messages: { +[id: string]: ?MessageInfo },
 ): ?MessageInfo {
   const thread = messageStore.threads[threadInfo.id];
   if (!thread) {
     return null;
   }
   for (const messageID of thread.messageIDs) {
     const messageInfo = messages[messageID];
     if (!messageInfo || isEmptyMediaMessage(messageInfo)) {
       continue;
     }
     return messageInfo;
   }
   return null;
 }
 
 function getLastUpdatedTime(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   mostRecentMessageInfo: ?MessageInfo,
 ): number {
   return mostRecentMessageInfo
     ? mostRecentMessageInfo.time
     : threadInfo.creationTime;
 }
 
 function createChatThreadItem(
   threadInfo: ThreadInfo,
   messageStore: MessageStore,
   messages: { +[id: string]: ?MessageInfo },
   sidebarInfos: ?$ReadOnlyArray<SidebarInfo>,
 ): ChatThreadItem {
   const mostRecentMessageInfo = getMostRecentMessageInfo(
     threadInfo,
     messageStore,
     messages,
   );
   const mostRecentNonLocalMessage = getMostRecentNonLocalMessageID(
     threadInfo.id,
     messageStore,
   );
   const lastUpdatedTime = getLastUpdatedTime(threadInfo, mostRecentMessageInfo);
 
   const sidebars = sidebarInfos ?? [];
   const allSidebarItems = sidebars.map(sidebarInfo => ({
     type: 'sidebar',
     ...sidebarInfo,
   }));
   const lastUpdatedTimeIncludingSidebars =
     allSidebarItems.length > 0
       ? Math.max(lastUpdatedTime, allSidebarItems[0].lastUpdatedTime)
       : lastUpdatedTime;
 
   const numUnreadSidebars = allSidebarItems.filter(
     sidebar => sidebar.threadInfo.currentUser.unread,
   ).length;
   let numReadSidebarsToShow = maxReadSidebars - numUnreadSidebars;
   const threeDaysAgo = Date.now() - threeDays;
 
   const sidebarItems = [];
   for (const sidebar of allSidebarItems) {
     if (sidebarItems.length >= maxUnreadSidebars) {
       break;
     } else if (sidebar.threadInfo.currentUser.unread) {
       sidebarItems.push(sidebar);
     } else if (
       sidebar.lastUpdatedTime > threeDaysAgo &&
       numReadSidebarsToShow > 0
     ) {
       sidebarItems.push(sidebar);
       numReadSidebarsToShow--;
     }
   }
 
   const numReadButRecentSidebars = allSidebarItems.filter(
     sidebar =>
       !sidebar.threadInfo.currentUser.unread &&
       sidebar.lastUpdatedTime > threeDaysAgo,
   ).length;
   if (
     sidebarItems.length < numUnreadSidebars + numReadButRecentSidebars ||
     (sidebarItems.length < allSidebarItems.length && sidebarItems.length > 0)
   ) {
     sidebarItems.push({
       type: 'seeMore',
       unread: numUnreadSidebars > maxUnreadSidebars,
     });
   }
   if (sidebarItems.length !== 0) {
     sidebarItems.push({
       type: 'spacer',
     });
   }
 
   return {
     type: 'chatThreadItem',
     threadInfo,
     mostRecentMessageInfo,
     mostRecentNonLocalMessage,
     lastUpdatedTime,
     lastUpdatedTimeIncludingSidebars,
     sidebars: sidebarItems,
   };
 }
 
 const chatListData: (state: BaseAppState<>) => $ReadOnlyArray<ChatThreadItem> =
   createSelector(
     threadInfoSelector,
     (state: BaseAppState<>) => state.messageStore,
     messageInfoSelector,
     sidebarInfoSelector,
     (
       threadInfos: { +[id: string]: ThreadInfo },
       messageStore: MessageStore,
       messageInfos: { +[id: string]: ?MessageInfo },
       sidebarInfos: { +[id: string]: $ReadOnlyArray<SidebarInfo> },
     ): $ReadOnlyArray<ChatThreadItem> =>
       getChatThreadItems(
         threadInfos,
         messageStore,
         messageInfos,
         sidebarInfos,
         threadIsTopLevel,
       ),
   );
 
 function useFlattenedChatListData(): $ReadOnlyArray<ChatThreadItem> {
   return useFilteredChatListData(threadInChatList);
 }
 
 function useFilteredChatListData(
-  filterFunction: (threadInfo: ?(ThreadInfo | RawThreadInfo)) => boolean,
+  filterFunction: (
+    threadInfo: ?(
+      | ThreadInfo
+      | RawThreadInfo
+      | MinimallyEncodedThreadInfo
+      | MinimallyEncodedRawThreadInfo
+    ),
+  ) => boolean,
 ): $ReadOnlyArray<ChatThreadItem> {
   const threadInfos = useSelector(threadInfoSelector);
   const messageInfos = useSelector(messageInfoSelector);
   const sidebarInfos = useSelector(sidebarInfoSelector);
   const messageStore = useSelector(state => state.messageStore);
 
   return React.useMemo(
     () =>
       getChatThreadItems(
         threadInfos,
         messageStore,
         messageInfos,
         sidebarInfos,
         filterFunction,
       ),
     [messageInfos, messageStore, sidebarInfos, filterFunction, threadInfos],
   );
 }
 
 function getChatThreadItems(
   threadInfos: { +[id: string]: ThreadInfo },
   messageStore: MessageStore,
   messageInfos: { +[id: string]: ?MessageInfo },
   sidebarInfos: { +[id: string]: $ReadOnlyArray<SidebarInfo> },
-  filterFunction: (threadInfo: ?(ThreadInfo | RawThreadInfo)) => boolean,
+  filterFunction: (
+    threadInfo: ?(
+      | ThreadInfo
+      | RawThreadInfo
+      | MinimallyEncodedThreadInfo
+      | MinimallyEncodedRawThreadInfo
+    ),
+  ) => boolean,
 ): $ReadOnlyArray<ChatThreadItem> {
   return _flow(
     _filter(filterFunction),
     _map((threadInfo: ThreadInfo): ChatThreadItem =>
       createChatThreadItem(
         threadInfo,
         messageStore,
         messageInfos,
         sidebarInfos[threadInfo.id],
       ),
     ),
     _orderBy('lastUpdatedTimeIncludingSidebars')('desc'),
   )(threadInfos);
 }
 
 export type RobotextChatMessageInfoItem = {
   +itemType: 'message',
   +messageInfoType: 'robotext',
   +messageInfo: RobotextMessageInfo,
   +startsConversation: boolean,
   +startsCluster: boolean,
   endsCluster: boolean,
   +robotext: EntityText,
   +threadCreatedFromMessage: ?ThreadInfo,
   +reactions: ReactionInfo,
 };
 export type ChatMessageInfoItem =
   | RobotextChatMessageInfoItem
   | {
       +itemType: 'message',
       +messageInfoType: 'composable',
       +messageInfo: ComposableMessageInfo,
       +localMessageInfo: ?LocalMessageInfo,
       +startsConversation: boolean,
       +startsCluster: boolean,
       endsCluster: boolean,
       +threadCreatedFromMessage: ?ThreadInfo,
       +reactions: ReactionInfo,
       +hasBeenEdited: boolean,
       +isPinned: boolean,
     };
 export type ChatMessageItem = { itemType: 'loader' } | ChatMessageInfoItem;
 
 export type ReactionInfo = { +[reaction: string]: MessageReactionInfo };
 type MessageReactionInfo = {
   +viewerReacted: boolean,
   +users: $ReadOnlyArray<RelativeUserInfo>,
 };
 type TargetMessageReactions = Map<string, Map<string, RelativeUserInfo>>;
 
 const msInFiveMinutes = 5 * 60 * 1000;
 function createChatMessageItems(
   threadID: string,
   messageStore: MessageStore,
   messageInfos: { +[id: string]: ?MessageInfo },
   threadInfos: { +[id: string]: ThreadInfo },
   threadInfoFromSourceMessageID: { +[id: string]: ThreadInfo },
   additionalMessages: $ReadOnlyArray<MessageInfo>,
   viewerID: string,
 ): ChatMessageItem[] {
   const thread = messageStore.threads[threadID];
 
   const threadMessageInfos = (thread?.messageIDs ?? [])
     .map((messageID: string) => messageInfos[messageID])
     .filter(Boolean);
   const messages =
     additionalMessages.length > 0
       ? sortMessageInfoList([...threadMessageInfos, ...additionalMessages])
       : threadMessageInfos;
 
   const targetMessageReactionsMap = new Map<string, TargetMessageReactions>();
 
   // We need to iterate backwards to put the order of messages in chronological
   // order, starting with the oldest. This avoids the scenario where the most
   // recent message with the remove_reaction action may try to remove a user
   // that hasn't been added to the messageReactionUsersInfoMap, causing it
   // to be skipped.
   for (let i = messages.length - 1; i >= 0; i--) {
     const messageInfo = messages[i];
     if (messageInfo.type !== messageTypes.REACTION) {
       continue;
     }
 
     if (!targetMessageReactionsMap.has(messageInfo.targetMessageID)) {
       const reactsMap: TargetMessageReactions = new Map();
       targetMessageReactionsMap.set(messageInfo.targetMessageID, reactsMap);
     }
 
     const messageReactsMap = targetMessageReactionsMap.get(
       messageInfo.targetMessageID,
     );
     invariant(messageReactsMap, 'messageReactsInfo should be set');
 
     if (!messageReactsMap.has(messageInfo.reaction)) {
       const usersInfoMap = new Map<string, RelativeUserInfo>();
       messageReactsMap.set(messageInfo.reaction, usersInfoMap);
     }
 
     const messageReactionUsersInfoMap = messageReactsMap.get(
       messageInfo.reaction,
     );
     invariant(
       messageReactionUsersInfoMap,
       'messageReactionUsersInfoMap should be set',
     );
 
     if (messageInfo.action === 'add_reaction') {
       messageReactionUsersInfoMap.set(
         messageInfo.creator.id,
         messageInfo.creator,
       );
     } else {
       messageReactionUsersInfoMap.delete(messageInfo.creator.id);
     }
   }
 
   const targetMessageEditMap = new Map<string, string>();
   for (let i = messages.length - 1; i >= 0; i--) {
     const messageInfo = messages[i];
     if (messageInfo.type !== messageTypes.EDIT_MESSAGE) {
       continue;
     }
     targetMessageEditMap.set(messageInfo.targetMessageID, messageInfo.text);
   }
 
   const targetMessagePinStatusMap = new Map<string, boolean>();
   // Once again, we iterate backwards to put the order of messages in
   // chronological order (i.e. oldest to newest) to handle pinned messages.
   // This is important because we want to make sure that the most recent pin
   // action is the one that is used to determine whether a message
   // is pinned or not.
   for (let i = messages.length - 1; i >= 0; i--) {
     const messageInfo = messages[i];
     if (messageInfo.type !== messageTypes.TOGGLE_PIN) {
       continue;
     }
 
     targetMessagePinStatusMap.set(
       messageInfo.targetMessageID,
       messageInfo.action === 'pin',
     );
   }
 
   const chatMessageItems = [];
   let lastMessageInfo = null;
   for (let i = messages.length - 1; i >= 0; i--) {
     const messageInfo = messages[i];
 
     if (
       messageInfo.type === messageTypes.REACTION ||
       messageInfo.type === messageTypes.EDIT_MESSAGE
     ) {
       continue;
     }
 
     let originalMessageInfo =
       messageInfo.type === messageTypes.SIDEBAR_SOURCE
         ? messageInfo.sourceMessage
         : messageInfo;
 
     if (isEmptyMediaMessage(originalMessageInfo)) {
       continue;
     }
 
     let hasBeenEdited = false;
     if (
       originalMessageInfo.type === messageTypes.TEXT &&
       originalMessageInfo.id
     ) {
       const newText = targetMessageEditMap.get(originalMessageInfo.id);
       if (newText !== undefined) {
         hasBeenEdited = true;
         originalMessageInfo = {
           ...originalMessageInfo,
           text: newText,
         };
       }
     }
 
     let startsConversation = true;
     let startsCluster = true;
     if (
       lastMessageInfo &&
       lastMessageInfo.time + msInFiveMinutes > originalMessageInfo.time
     ) {
       startsConversation = false;
       if (
         isComposableMessageType(lastMessageInfo.type) &&
         isComposableMessageType(originalMessageInfo.type) &&
         lastMessageInfo.creator.id === originalMessageInfo.creator.id
       ) {
         startsCluster = false;
       }
     }
     if (startsCluster && chatMessageItems.length > 0) {
       const lastMessageItem = chatMessageItems[chatMessageItems.length - 1];
       invariant(lastMessageItem.itemType === 'message', 'should be message');
       lastMessageItem.endsCluster = true;
     }
     const threadCreatedFromMessage =
       messageInfo.id && threadInfos[threadID]?.type !== threadTypes.SIDEBAR
         ? threadInfoFromSourceMessageID[messageInfo.id]
         : undefined;
 
     const isPinned = !!(
       originalMessageInfo.id &&
       targetMessagePinStatusMap.get(originalMessageInfo.id)
     );
 
     const renderedReactions: ReactionInfo = (() => {
       const result = {};
 
       let messageReactsMap;
       if (originalMessageInfo.id) {
         messageReactsMap = targetMessageReactionsMap.get(
           originalMessageInfo.id,
         );
       }
 
       if (!messageReactsMap) {
         return result;
       }
 
       for (const reaction of messageReactsMap.keys()) {
         const reactionUsersInfoMap = messageReactsMap.get(reaction);
         invariant(reactionUsersInfoMap, 'reactionUsersInfoMap should be set');
 
         if (reactionUsersInfoMap.size === 0) {
           continue;
         }
 
         const reactionUserInfos = [...reactionUsersInfoMap.values()];
 
         const messageReactionInfo = {
           users: reactionUserInfos,
           viewerReacted: reactionUsersInfoMap.has(viewerID),
         };
 
         result[reaction] = messageReactionInfo;
       }
 
       return result;
     })();
 
     if (isComposableMessageType(originalMessageInfo.type)) {
       // We use these invariants instead of just checking the messageInfo.type
       // directly in the conditional above so that isComposableMessageType can
       // be the source of truth
       invariant(
         originalMessageInfo.type === messageTypes.TEXT ||
           originalMessageInfo.type === messageTypes.IMAGES ||
           originalMessageInfo.type === messageTypes.MULTIMEDIA,
         "Flow doesn't understand isComposableMessageType above",
       );
       const localMessageInfo =
         messageStore.local[messageKey(originalMessageInfo)];
       chatMessageItems.push({
         itemType: 'message',
         messageInfoType: 'composable',
         messageInfo: originalMessageInfo,
         localMessageInfo,
         startsConversation,
         startsCluster,
         endsCluster: false,
         threadCreatedFromMessage,
         reactions: renderedReactions,
         hasBeenEdited,
         isPinned,
       });
     } else {
       invariant(
         originalMessageInfo.type !== messageTypes.TEXT &&
           originalMessageInfo.type !== messageTypes.IMAGES &&
           originalMessageInfo.type !== messageTypes.MULTIMEDIA,
         "Flow doesn't understand isComposableMessageType above",
       );
       const threadInfo = threadInfos[threadID];
       const parentThreadInfo = threadInfo?.parentThreadID
         ? threadInfos[threadInfo.parentThreadID]
         : null;
 
       const robotext = robotextForMessageInfo(
         originalMessageInfo,
         threadInfo,
         parentThreadInfo,
       );
       chatMessageItems.push({
         itemType: 'message',
         messageInfoType: 'robotext',
         messageInfo: originalMessageInfo,
         startsConversation,
         startsCluster,
         endsCluster: false,
         threadCreatedFromMessage,
         robotext,
         reactions: renderedReactions,
       });
     }
     lastMessageInfo = originalMessageInfo;
   }
   if (chatMessageItems.length > 0) {
     const lastMessageItem = chatMessageItems[chatMessageItems.length - 1];
     invariant(lastMessageItem.itemType === 'message', 'should be message');
     lastMessageItem.endsCluster = true;
   }
   chatMessageItems.reverse();
   const hideSpinner = thread ? thread.startReached : threadIsPending(threadID);
   if (hideSpinner) {
     return chatMessageItems;
   }
   return [...chatMessageItems, ({ itemType: 'loader' }: ChatMessageItem)];
 }
 
 const baseMessageListData = (
   threadID: ?string,
   additionalMessages: $ReadOnlyArray<MessageInfo>,
 ) =>
   createSelector(
     (state: BaseAppState<>) => state.messageStore,
     messageInfoSelector,
     threadInfoSelector,
     threadInfoFromSourceMessageIDSelector,
     (state: BaseAppState<>) =>
       state.currentUserInfo && state.currentUserInfo.id,
     (
       messageStore: MessageStore,
       messageInfos: { +[id: string]: ?MessageInfo },
       threadInfos: { +[id: string]: ThreadInfo },
       threadInfoFromSourceMessageID: { +[id: string]: ThreadInfo },
       viewerID: ?string,
     ): ?(ChatMessageItem[]) => {
       if (!threadID || !viewerID) {
         return null;
       }
       return createChatMessageItems(
         threadID,
         messageStore,
         messageInfos,
         threadInfos,
         threadInfoFromSourceMessageID,
         additionalMessages,
         viewerID,
       );
     },
   );
 export type MessageListData = ?(ChatMessageItem[]);
 const messageListData: (
   threadID: ?string,
   additionalMessages: $ReadOnlyArray<MessageInfo>,
 ) => (state: BaseAppState<>) => MessageListData = memoize2(baseMessageListData);
 
 export type UseMessageListDataArgs = {
   +searching: boolean,
   +userInfoInputArray: $ReadOnlyArray<AccountUserInfo>,
-  +threadInfo: ?ThreadInfo,
+  +threadInfo: ?ThreadInfo | ?MinimallyEncodedThreadInfo,
 };
 
 function useMessageListData({
   searching,
   userInfoInputArray,
   threadInfo,
 }: UseMessageListDataArgs): MessageListData {
   const messageInfos = useSelector(messageInfoSelector);
 
   const containingThread = useSelector(state => {
     if (!threadInfo || threadInfo.type !== threadTypes.SIDEBAR) {
       return null;
     }
     return state.messageStore.threads[threadInfo.containingThreadID];
   });
 
   const pendingSidebarEditMessageInfo = React.useMemo(() => {
     const sourceMessageID = threadInfo?.sourceMessageID;
     const threadMessageInfos = (containingThread?.messageIDs ?? [])
       .map((messageID: string) => messageInfos[messageID])
       .filter(Boolean)
       .filter(
         message =>
           message.type === messageTypes.EDIT_MESSAGE &&
           message.targetMessageID === sourceMessageID,
       );
     if (threadMessageInfos.length === 0) {
       return null;
     }
     return threadMessageInfos[0];
   }, [threadInfo, containingThread, messageInfos]);
 
   const pendingSidebarSourceMessageInfo = useSelector(state => {
     const sourceMessageID = threadInfo?.sourceMessageID;
     if (
       !threadInfo ||
       threadInfo.type !== threadTypes.SIDEBAR ||
       !sourceMessageID
     ) {
       return null;
     }
     const thread = state.messageStore.threads[threadInfo.id];
     const shouldSourceBeAdded =
       !thread ||
       (thread.startReached &&
         thread.messageIDs.every(
           id => messageInfos[id]?.type !== messageTypes.SIDEBAR_SOURCE,
         ));
     return shouldSourceBeAdded ? messageInfos[sourceMessageID] : null;
   });
 
   invariant(
     !pendingSidebarSourceMessageInfo ||
       pendingSidebarSourceMessageInfo.type !== messageTypes.SIDEBAR_SOURCE,
     'sidebars can not be created from sidebar_source message',
   );
 
   const additionalMessages = React.useMemo(() => {
     if (!pendingSidebarSourceMessageInfo) {
       return [];
     }
     const result = [pendingSidebarSourceMessageInfo];
     if (pendingSidebarEditMessageInfo) {
       result.push(pendingSidebarEditMessageInfo);
     }
     return result;
   }, [pendingSidebarSourceMessageInfo, pendingSidebarEditMessageInfo]);
   const boundMessageListData = useSelector(
     messageListData(threadInfo?.id, additionalMessages),
   );
 
   return React.useMemo(() => {
     if (searching && userInfoInputArray.length === 0) {
       return [];
     }
     return boundMessageListData;
   }, [searching, userInfoInputArray.length, boundMessageListData]);
 }
 
 export {
   messageInfoSelector,
   createChatThreadItem,
   chatListData,
   createChatMessageItems,
   messageListData,
   useFlattenedChatListData,
   useFilteredChatListData,
   useMessageListData,
 };
diff --git a/lib/selectors/nav-selectors.js b/lib/selectors/nav-selectors.js
index dbea4c4dc..ec8dcec4f 100644
--- a/lib/selectors/nav-selectors.js
+++ b/lib/selectors/nav-selectors.js
@@ -1,171 +1,180 @@
 // @flow
 
 import * as React from 'react';
 import { createSelector } from 'reselect';
 
 import { useENSNames } from '../hooks/ens-cache.js';
 import SearchIndex from '../shared/search-index.js';
 import { memberHasAdminPowers } from '../shared/thread-utils.js';
 import type { Platform } from '../types/device-types.js';
 import {
   type CalendarQuery,
   defaultCalendarQuery,
 } from '../types/entry-types.js';
 import type { CalendarFilter } from '../types/filter-types.js';
+import type {
+  MinimallyEncodedRawThreadInfo,
+  MinimallyEncodedThreadInfo,
+} from '../types/minimally-encoded-thread-permissions-types.js';
 import type { BaseNavInfo } from '../types/nav-types.js';
 import type { BaseAppState } from '../types/redux-types.js';
 import type { RawThreadInfo, ThreadInfo } from '../types/thread-types.js';
 import { getConfig } from '../utils/config.js';
 import { values } from '../utils/objects.js';
 import { useSelector } from '../utils/redux-utils.js';
 
 function timeUntilCalendarRangeExpiration(
   lastUserInteractionCalendar: number,
 ): ?number {
   const inactivityLimit = getConfig().calendarRangeInactivityLimit;
   if (inactivityLimit === null || inactivityLimit === undefined) {
     return null;
   }
   return lastUserInteractionCalendar + inactivityLimit - Date.now();
 }
 
 function calendarRangeExpired(lastUserInteractionCalendar: number): boolean {
   const timeUntil = timeUntilCalendarRangeExpiration(
     lastUserInteractionCalendar,
   );
   if (timeUntil === null || timeUntil === undefined) {
     return false;
   }
   return timeUntil <= 0;
 }
 
 const currentCalendarQuery: (
   state: BaseAppState<>,
 ) => (calendarActive: boolean) => CalendarQuery = createSelector(
   (state: BaseAppState<>) => state.entryStore.lastUserInteractionCalendar,
   (state: BaseAppState<>) => state.navInfo,
   (state: BaseAppState<>) => state.calendarFilters,
   (
     lastUserInteractionCalendar: number,
     navInfo: BaseNavInfo,
     calendarFilters: $ReadOnlyArray<CalendarFilter>,
   ) => {
     // Return a function since we depend on the time of evaluation
     return (calendarActive: boolean, platform: ?Platform): CalendarQuery => {
       if (calendarActive) {
         return {
           startDate: navInfo.startDate,
           endDate: navInfo.endDate,
           filters: calendarFilters,
         };
       }
       if (calendarRangeExpired(lastUserInteractionCalendar)) {
         return defaultCalendarQuery(platform);
       }
       return {
         startDate: navInfo.startDate,
         endDate: navInfo.endDate,
         filters: calendarFilters,
       };
     };
   },
 );
 
 // Without allAtOnce, useThreadSearchIndex is very expensive. useENSNames would
 // trigger its recalculation for each ENS name as it streams in, but we would
 // prefer to trigger its recaculation just once for every update of the
 // underlying Redux data.
 const useENSNamesOptions = { allAtOnce: true };
 
 function useThreadSearchIndex(
-  threadInfos: $ReadOnlyArray<RawThreadInfo | ThreadInfo>,
+  threadInfos: $ReadOnlyArray<
+    | RawThreadInfo
+    | ThreadInfo
+    | MinimallyEncodedRawThreadInfo
+    | MinimallyEncodedThreadInfo,
+  >,
 ): SearchIndex {
   const userInfos = useSelector(state => state.userStore.userInfos);
   const viewerID = useSelector(
     state => state.currentUserInfo && state.currentUserInfo.id,
   );
   const nonViewerMembers = React.useMemo(() => {
     const allMembersOfAllThreads = new Map();
     for (const threadInfo of threadInfos) {
       for (const member of threadInfo.members) {
         const isParentAdmin = memberHasAdminPowers(member);
         if (!member.role && !isParentAdmin) {
           continue;
         }
         if (member.id === viewerID) {
           continue;
         }
         if (!allMembersOfAllThreads.has(member.id)) {
           const userInfo = userInfos[member.id];
           if (userInfo?.username) {
             allMembersOfAllThreads.set(member.id, userInfo);
           }
         }
       }
     }
     return [...allMembersOfAllThreads.values()];
   }, [threadInfos, userInfos, viewerID]);
 
   const nonViewerMembersWithENSNames = useENSNames(
     nonViewerMembers,
     useENSNamesOptions,
   );
 
   const memberMap = React.useMemo(() => {
     const result = new Map();
     for (const userInfo of nonViewerMembersWithENSNames) {
       result.set(userInfo.id, userInfo);
     }
     return result;
   }, [nonViewerMembersWithENSNames]);
 
   return React.useMemo(() => {
     const searchIndex = new SearchIndex();
     for (const threadInfo of threadInfos) {
       const searchTextArray = [];
       if (threadInfo.name) {
         searchTextArray.push(threadInfo.name);
       }
       if (threadInfo.description) {
         searchTextArray.push(threadInfo.description);
       }
       for (const member of threadInfo.members) {
         const isParentAdmin = memberHasAdminPowers(member);
         if (!member.role && !isParentAdmin) {
           continue;
         }
         if (member.id === viewerID) {
           continue;
         }
         const userInfo = userInfos[member.id];
         const rawUsername = userInfo?.username;
         if (rawUsername) {
           searchTextArray.push(rawUsername);
         }
         const resolvedUserInfo = memberMap.get(member.id);
         const username = resolvedUserInfo?.username;
         if (username && username !== rawUsername) {
           searchTextArray.push(username);
         }
       }
       searchIndex.addEntry(threadInfo.id, searchTextArray.join(' '));
     }
     return searchIndex;
   }, [threadInfos, viewerID, userInfos, memberMap]);
 }
 
 function useGlobalThreadSearchIndex(): SearchIndex {
   const threadInfos = useSelector(state => state.threadStore.threadInfos);
   const threadInfosArray = React.useMemo(
     () => values(threadInfos),
     [threadInfos],
   );
   return useThreadSearchIndex(threadInfosArray);
 }
 
 export {
   timeUntilCalendarRangeExpiration,
   currentCalendarQuery,
   useThreadSearchIndex,
   useGlobalThreadSearchIndex,
 };
diff --git a/lib/selectors/thread-selectors.js b/lib/selectors/thread-selectors.js
index 9da38029c..56e3c87be 100644
--- a/lib/selectors/thread-selectors.js
+++ b/lib/selectors/thread-selectors.js
@@ -1,518 +1,519 @@
 // @flow
 
 import _compact from 'lodash/fp/compact.js';
 import _filter from 'lodash/fp/filter.js';
 import _flow from 'lodash/fp/flow.js';
 import _map from 'lodash/fp/map.js';
 import _mapValues from 'lodash/fp/mapValues.js';
 import _orderBy from 'lodash/fp/orderBy.js';
 import _some from 'lodash/fp/some.js';
 import _sortBy from 'lodash/fp/sortBy.js';
 import _memoize from 'lodash/memoize.js';
 import { createSelector } from 'reselect';
 import { createObjectSelector } from 'reselect-map';
 
 import {
   filteredThreadIDsSelector,
   includeDeletedSelector,
 } from './calendar-filter-selectors.js';
 import { relativeMemberInfoSelectorForMembersOfThread } from './user-selectors.js';
 import genesis from '../facts/genesis.js';
 import {
   getAvatarForThread,
   getRandomDefaultEmojiAvatar,
 } from '../shared/avatar-utils.js';
 import { createEntryInfo } from '../shared/entry-utils.js';
 import { getMostRecentNonLocalMessageID } from '../shared/message-utils.js';
 import {
   threadInHomeChatList,
   threadInBackgroundChatList,
   threadInFilterList,
   threadInfoFromRawThreadInfo,
   threadHasPermission,
   threadInChatList,
   threadHasAdminRole,
   roleIsAdminRole,
   threadIsPending,
   getPendingThreadID,
 } from '../shared/thread-utils.js';
 import type { ClientEmojiAvatar } from '../types/avatar-types';
 import type { EntryInfo } from '../types/entry-types.js';
 import type { MessageStore, RawMessageInfo } from '../types/message-types.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import type { BaseAppState } from '../types/redux-types.js';
 import { threadPermissions } from '../types/thread-permission-types.js';
 import {
   threadTypes,
   threadTypeIsCommunityRoot,
   type ThreadType,
 } from '../types/thread-types-enum.js';
 import {
   type ThreadInfo,
   type RawThreadInfo,
   type RelativeMemberInfo,
   type SidebarInfo,
   type RawThreadInfos,
 } from '../types/thread-types.js';
 import { dateString, dateFromString } from '../utils/date-utils.js';
 import { values } from '../utils/objects.js';
 
 const _mapValuesWithKeys = _mapValues.convert({ cap: false });
 
 type ThreadInfoSelectorType = (state: BaseAppState<>) => {
   +[id: string]: ThreadInfo,
 };
 const threadInfoSelector: ThreadInfoSelectorType = createObjectSelector(
   (state: BaseAppState<>) => state.threadStore.threadInfos,
   (state: BaseAppState<>) => state.currentUserInfo && state.currentUserInfo.id,
   (state: BaseAppState<>) => state.userStore.userInfos,
   threadInfoFromRawThreadInfo,
 );
 
 const communityThreadSelector: (
   state: BaseAppState<>,
 ) => $ReadOnlyArray<ThreadInfo> = createSelector(
   threadInfoSelector,
   (threadInfos: { +[id: string]: ThreadInfo }) => {
     const result = [];
     for (const threadID in threadInfos) {
       const threadInfo = threadInfos[threadID];
       if (!threadTypeIsCommunityRoot(threadInfo.type)) {
         continue;
       }
       result.push(threadInfo);
     }
     return result;
   },
 );
 
 const canBeOnScreenThreadInfos: (
   state: BaseAppState<>,
 ) => $ReadOnlyArray<ThreadInfo> = createSelector(
   threadInfoSelector,
   (threadInfos: { +[id: string]: ThreadInfo }) => {
     const result = [];
     for (const threadID in threadInfos) {
       const threadInfo = threadInfos[threadID];
       if (!threadInFilterList(threadInfo)) {
         continue;
       }
       result.push(threadInfo);
     }
     return result;
   },
 );
 
 const onScreenThreadInfos: (
   state: BaseAppState<>,
 ) => $ReadOnlyArray<ThreadInfo> = createSelector(
   filteredThreadIDsSelector,
   canBeOnScreenThreadInfos,
   (
     inputThreadIDs: ?$ReadOnlySet<string>,
     threadInfos: $ReadOnlyArray<ThreadInfo>,
   ) => {
     const threadIDs = inputThreadIDs;
     if (!threadIDs) {
       return threadInfos;
     }
     return threadInfos.filter(threadInfo => threadIDs.has(threadInfo.id));
   },
 );
 
 const onScreenEntryEditableThreadInfos: (
   state: BaseAppState<>,
 ) => $ReadOnlyArray<ThreadInfo> = createSelector(
   onScreenThreadInfos,
   (threadInfos: $ReadOnlyArray<ThreadInfo>) =>
     threadInfos.filter(threadInfo =>
       threadHasPermission(threadInfo, threadPermissions.EDIT_ENTRIES),
     ),
 );
 
 const entryInfoSelector: (state: BaseAppState<>) => {
   +[id: string]: EntryInfo,
 } = createObjectSelector(
   (state: BaseAppState<>) => state.entryStore.entryInfos,
   (state: BaseAppState<>) => state.currentUserInfo && state.currentUserInfo.id,
   (state: BaseAppState<>) => state.userStore.userInfos,
   createEntryInfo,
 );
 
 // "current" means within startDate/endDate range, not deleted, and in
 // onScreenThreadInfos
 const currentDaysToEntries: (state: BaseAppState<>) => {
   +[dayString: string]: EntryInfo[],
 } = createSelector(
   entryInfoSelector,
   (state: BaseAppState<>) => state.entryStore.daysToEntries,
   (state: BaseAppState<>) => state.navInfo.startDate,
   (state: BaseAppState<>) => state.navInfo.endDate,
   onScreenThreadInfos,
   includeDeletedSelector,
   (
     entryInfos: { +[id: string]: EntryInfo },
     daysToEntries: { +[day: string]: string[] },
     startDateString: string,
     endDateString: string,
     onScreen: $ReadOnlyArray<ThreadInfo>,
     includeDeleted: boolean,
   ) => {
     const allDaysWithinRange = {},
       startDate = dateFromString(startDateString),
       endDate = dateFromString(endDateString);
     for (
       const curDate = startDate;
       curDate <= endDate;
       curDate.setDate(curDate.getDate() + 1)
     ) {
       allDaysWithinRange[dateString(curDate)] = [];
     }
     return _mapValuesWithKeys((_: string[], dayString: string) =>
       _flow(
         _map((entryID: string) => entryInfos[entryID]),
         _compact,
         _filter(
           (entryInfo: EntryInfo) =>
             (includeDeleted || !entryInfo.deleted) &&
             _some(['id', entryInfo.threadID])(onScreen),
         ),
         _sortBy('creationTime'),
       )(daysToEntries[dayString] ? daysToEntries[dayString] : []),
     )(allDaysWithinRange);
   },
 );
 
 const childThreadInfos: (state: BaseAppState<>) => {
   +[id: string]: $ReadOnlyArray<ThreadInfo>,
 } = createSelector(
   threadInfoSelector,
   (threadInfos: { +[id: string]: ThreadInfo }) => {
     const result = {};
     for (const id in threadInfos) {
       const threadInfo = threadInfos[id];
       const parentThreadID = threadInfo.parentThreadID;
       if (parentThreadID === null || parentThreadID === undefined) {
         continue;
       }
       if (result[parentThreadID] === undefined) {
         result[parentThreadID] = [];
       }
       result[parentThreadID].push(threadInfo);
     }
     return result;
   },
 );
 
 const containedThreadInfos: (state: BaseAppState<>) => {
   +[id: string]: $ReadOnlyArray<ThreadInfo>,
 } = createSelector(
   threadInfoSelector,
   (threadInfos: { +[id: string]: ThreadInfo }) => {
     const result = {};
     for (const id in threadInfos) {
       const threadInfo = threadInfos[id];
       const { containingThreadID } = threadInfo;
       if (containingThreadID === null || containingThreadID === undefined) {
         continue;
       }
       if (result[containingThreadID] === undefined) {
         result[containingThreadID] = [];
       }
       result[containingThreadID].push(threadInfo);
     }
     return result;
   },
 );
 
 function getMostRecentRawMessageInfo(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   messageStore: MessageStore,
 ): ?RawMessageInfo {
   const thread = messageStore.threads[threadInfo.id];
   if (!thread) {
     return null;
   }
   for (const messageID of thread.messageIDs) {
     return messageStore.messages[messageID];
   }
   return null;
 }
 
 const sidebarInfoSelector: (state: BaseAppState<>) => {
   +[id: string]: $ReadOnlyArray<SidebarInfo>,
 } = createObjectSelector(
   childThreadInfos,
   (state: BaseAppState<>) => state.messageStore,
   (childThreads: $ReadOnlyArray<ThreadInfo>, messageStore: MessageStore) => {
     const sidebarInfos = [];
     for (const childThreadInfo of childThreads) {
       if (
         !threadInChatList(childThreadInfo) ||
         childThreadInfo.type !== threadTypes.SIDEBAR
       ) {
         continue;
       }
       const mostRecentRawMessageInfo = getMostRecentRawMessageInfo(
         childThreadInfo,
         messageStore,
       );
       const lastUpdatedTime =
         mostRecentRawMessageInfo?.time ?? childThreadInfo.creationTime;
       const mostRecentNonLocalMessage = getMostRecentNonLocalMessageID(
         childThreadInfo.id,
         messageStore,
       );
       sidebarInfos.push({
         threadInfo: childThreadInfo,
         lastUpdatedTime,
         mostRecentNonLocalMessage,
       });
     }
     return _orderBy('lastUpdatedTime')('desc')(sidebarInfos);
   },
 );
 
 const unreadCount: (state: BaseAppState<>) => number = createSelector(
   (state: BaseAppState<>) => state.threadStore.threadInfos,
   (threadInfos: RawThreadInfos): number =>
     values(threadInfos).filter(
       threadInfo =>
         threadInHomeChatList(threadInfo) && threadInfo.currentUser.unread,
     ).length,
 );
 
 const unreadBackgroundCount: (state: BaseAppState<>) => number = createSelector(
   (state: BaseAppState<>) => state.threadStore.threadInfos,
   (threadInfos: RawThreadInfos): number =>
     values(threadInfos).filter(
       threadInfo =>
         threadInBackgroundChatList(threadInfo) && threadInfo.currentUser.unread,
     ).length,
 );
 
 const baseAncestorThreadInfos = (threadID: string) =>
   createSelector(
     (state: BaseAppState<>) => threadInfoSelector(state),
     (threadInfos: {
       +[id: string]: ThreadInfo,
     }): $ReadOnlyArray<ThreadInfo> => {
       const pathComponents: ThreadInfo[] = [];
       let node: ?ThreadInfo = threadInfos[threadID];
       while (node) {
         pathComponents.push(node);
         node = node.parentThreadID ? threadInfos[node.parentThreadID] : null;
       }
       pathComponents.reverse();
       return pathComponents;
     },
   );
 
 const ancestorThreadInfos: (
   threadID: string,
 ) => (state: BaseAppState<>) => $ReadOnlyArray<ThreadInfo> = _memoize(
   baseAncestorThreadInfos,
 );
 
 const baseOtherUsersButNoOtherAdmins = (threadID: string) =>
   createSelector(
     (state: BaseAppState<>) => state.threadStore.threadInfos[threadID],
     relativeMemberInfoSelectorForMembersOfThread(threadID),
     (
       threadInfo: ?RawThreadInfo,
       members: $ReadOnlyArray<RelativeMemberInfo>,
     ): boolean => {
       if (!threadInfo) {
         return false;
       }
       if (!threadHasAdminRole(threadInfo)) {
         return false;
       }
       let otherUsersExist = false;
       let otherAdminsExist = false;
       for (const member of members) {
         const role = member.role;
         if (role === undefined || role === null || member.isViewer) {
           continue;
         }
         otherUsersExist = true;
         if (roleIsAdminRole(threadInfo?.roles[role])) {
           otherAdminsExist = true;
           break;
         }
       }
       return otherUsersExist && !otherAdminsExist;
     },
   );
 
 const otherUsersButNoOtherAdmins: (
   threadID: string,
 ) => (state: BaseAppState<>) => boolean = _memoize(
   baseOtherUsersButNoOtherAdmins,
 );
 
 function mostRecentlyReadThread(
   messageStore: MessageStore,
   threadInfos: RawThreadInfos,
 ): ?string {
   let mostRecent = null;
   for (const threadID in threadInfos) {
     const threadInfo = threadInfos[threadID];
     if (threadInfo.currentUser.unread) {
       continue;
     }
     const threadMessageInfo = messageStore.threads[threadID];
     if (!threadMessageInfo) {
       continue;
     }
     const mostRecentMessageTime =
       threadMessageInfo.messageIDs.length === 0
         ? threadInfo.creationTime
         : messageStore.messages[threadMessageInfo.messageIDs[0]].time;
     if (mostRecent && mostRecent.time >= mostRecentMessageTime) {
       continue;
     }
 
     const topLevelThreadID =
       threadInfo.type === threadTypes.SIDEBAR
         ? threadInfo.parentThreadID
         : threadID;
     mostRecent = { threadID: topLevelThreadID, time: mostRecentMessageTime };
   }
   return mostRecent ? mostRecent.threadID : null;
 }
 
 const mostRecentlyReadThreadSelector: (state: BaseAppState<>) => ?string =
   createSelector(
     (state: BaseAppState<>) => state.messageStore,
     (state: BaseAppState<>) => state.threadStore.threadInfos,
     mostRecentlyReadThread,
   );
 
 const threadInfoFromSourceMessageIDSelector: (state: BaseAppState<>) => {
   +[id: string]: ThreadInfo,
 } = createSelector(
   (state: BaseAppState<>) => state.threadStore.threadInfos,
   threadInfoSelector,
   (
     rawThreadInfos: RawThreadInfos,
     threadInfos: { +[id: string]: ThreadInfo },
   ) => {
     const pendingToRealizedThreadIDs =
       pendingToRealizedThreadIDsSelector(rawThreadInfos);
     const result = {};
     for (const realizedID of pendingToRealizedThreadIDs.values()) {
       const threadInfo = threadInfos[realizedID];
       if (threadInfo && threadInfo.sourceMessageID) {
         result[threadInfo.sourceMessageID] = threadInfo;
       }
     }
     return result;
   },
 );
 const pendingToRealizedThreadIDsSelector: (
   rawThreadInfos: RawThreadInfos,
 ) => $ReadOnlyMap<string, string> = createSelector(
   (rawThreadInfos: RawThreadInfos) => rawThreadInfos,
   (rawThreadInfos: RawThreadInfos) => {
     const result = new Map();
     for (const threadID in rawThreadInfos) {
       const rawThreadInfo = rawThreadInfos[threadID];
       if (
         threadIsPending(threadID) ||
         (rawThreadInfo.parentThreadID !== genesis.id &&
           rawThreadInfo.type !== threadTypes.SIDEBAR)
       ) {
         continue;
       }
       const actualMemberIDs = rawThreadInfo.members
         .filter(member => member.role)
         .map(member => member.id);
       const pendingThreadID = getPendingThreadID(
         rawThreadInfo.type,
         actualMemberIDs,
         rawThreadInfo.sourceMessageID,
       );
       const existingResult = result.get(pendingThreadID);
       if (
         !existingResult ||
         rawThreadInfos[existingResult].creationTime > rawThreadInfo.creationTime
       ) {
         result.set(pendingThreadID, threadID);
       }
     }
     return result;
   },
 );
 
 const baseSavedEmojiAvatarSelectorForThread = (
   threadID: string,
   containingThreadID: ?string,
 ) =>
   createSelector(
     (state: BaseAppState<>) => threadInfoSelector(state)[threadID],
     (state: BaseAppState<>) =>
       containingThreadID ? threadInfoSelector(state)[containingThreadID] : null,
     (threadInfo: ThreadInfo, containingThreadInfo: ?ThreadInfo) => {
       return () => {
         let threadAvatar = getAvatarForThread(threadInfo, containingThreadInfo);
         if (threadAvatar.type !== 'emoji') {
           threadAvatar = getRandomDefaultEmojiAvatar();
         }
         return threadAvatar;
       };
     },
   );
 
 const savedEmojiAvatarSelectorForThread: (
   threadID: string,
   containingThreadID: ?string,
 ) => (state: BaseAppState<>) => () => ClientEmojiAvatar = _memoize(
   baseSavedEmojiAvatarSelectorForThread,
 );
 
 const baseThreadInfosSelectorForThreadType = (threadType: ThreadType) =>
   createSelector(
     (state: BaseAppState<>) => threadInfoSelector(state),
     (threadInfos: {
       +[id: string]: ThreadInfo,
     }): $ReadOnlyArray<ThreadInfo> => {
       const result = [];
 
       for (const threadID in threadInfos) {
         const threadInfo = threadInfos[threadID];
         if (threadInfo.type === threadType) {
           result.push(threadInfo);
         }
       }
 
       return result;
     },
   );
 
 const threadInfosSelectorForThreadType: (
   threadType: ThreadType,
 ) => (state: BaseAppState<>) => $ReadOnlyArray<ThreadInfo> = _memoize(
   baseThreadInfosSelectorForThreadType,
 );
 
 export {
   ancestorThreadInfos,
   threadInfoSelector,
   communityThreadSelector,
   onScreenThreadInfos,
   onScreenEntryEditableThreadInfos,
   entryInfoSelector,
   currentDaysToEntries,
   childThreadInfos,
   containedThreadInfos,
   unreadCount,
   unreadBackgroundCount,
   otherUsersButNoOtherAdmins,
   mostRecentlyReadThread,
   mostRecentlyReadThreadSelector,
   sidebarInfoSelector,
   threadInfoFromSourceMessageIDSelector,
   pendingToRealizedThreadIDsSelector,
   savedEmojiAvatarSelectorForThread,
   threadInfosSelectorForThreadType,
 };
diff --git a/lib/shared/ancestor-threads.js b/lib/shared/ancestor-threads.js
index 61328c7e1..63df1085b 100644
--- a/lib/shared/ancestor-threads.js
+++ b/lib/shared/ancestor-threads.js
@@ -1,29 +1,30 @@
 // @flow
 
 import genesis from '../facts/genesis.js';
 import {
   threadInfoSelector,
   ancestorThreadInfos,
 } from '../selectors/thread-selectors.js';
 import { threadIsPending } from '../shared/thread-utils.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import { type ThreadInfo } from '../types/thread-types.js';
 import { useSelector } from '../utils/redux-utils.js';
 
 function useAncestorThreads(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 ): $ReadOnlyArray<ThreadInfo> {
   return useSelector(state => {
     if (!threadIsPending(threadInfo.id)) {
       const ancestorThreads = ancestorThreadInfos(threadInfo.id)(state);
       if (ancestorThreads.length > 1) {
         return ancestorThreads.slice(0, -1);
       }
 
       return ancestorThreads;
     }
     const genesisThreadInfo = threadInfoSelector(state)[genesis.id];
     return genesisThreadInfo ? [genesisThreadInfo] : [];
   });
 }
 
 export { useAncestorThreads };
diff --git a/lib/shared/avatar-utils.js b/lib/shared/avatar-utils.js
index 406130120..2bb58275b 100644
--- a/lib/shared/avatar-utils.js
+++ b/lib/shared/avatar-utils.js
@@ -1,363 +1,381 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
 import stringHash from 'string-hash';
 
 import { selectedThreadColors } from './color-utils.js';
 import { threadOtherMembers } from './thread-utils.js';
 import genesis from '../facts/genesis.js';
 import { useENSAvatar } from '../hooks/ens-cache.js';
 import { threadInfoSelector } from '../selectors/thread-selectors.js';
 import { getETHAddressForUserInfo } from '../shared/account-utils.js';
 import type {
   ClientEmojiAvatar,
   ClientAvatar,
   ResolvedClientAvatar,
   GenericUserInfoWithAvatar,
 } from '../types/avatar-types.js';
+import type {
+  MinimallyEncodedRawThreadInfo,
+  MinimallyEncodedThreadInfo,
+} from '../types/minimally-encoded-thread-permissions-types.js';
 import { threadTypes } from '../types/thread-types-enum.js';
 import { type RawThreadInfo, type ThreadInfo } from '../types/thread-types.js';
 import type { UserInfos } from '../types/user-types.js';
 import { useSelector } from '../utils/redux-utils.js';
 import { ashoatKeyserverID } from '../utils/validation-utils.js';
 
 const defaultAnonymousUserEmojiAvatar: ClientEmojiAvatar = {
   color: selectedThreadColors[4],
   emoji: '👤',
   type: 'emoji',
 };
 
 const defaultEmojiAvatars: $ReadOnlyArray<ClientEmojiAvatar> = [
   { color: selectedThreadColors[0], emoji: '😀', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '😃', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '😄', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '😁', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '😆', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🙂', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '😉', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '😊', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '😇', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🥰', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '😍', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🤩', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🥳', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '😝', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '😎', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🧐', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🥸', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🤗', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '😤', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🤯', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🤔', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🫡', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🤫', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '😮', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '😲', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🤠', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🤑', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '👩‍🚀', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🥷', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '👻', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '👾', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🤖', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '😺', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '😸', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '😹', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '😻', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🎩', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '👑', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🐶', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🐱', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🐭', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🐹', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🐰', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🐻', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🐼', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🐻‍❄️', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🐨', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🐯', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🦁', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🐸', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🐔', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🐧', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🐦', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🐤', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🦄', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🐝', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🦋', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🐬', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🐳', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🐋', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🦈', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🦭', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🐘', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🦛', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🐐', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🐓', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🦃', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🦩', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🦔', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🐅', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🐆', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🦓', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🦒', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🦘', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🐎', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🐕', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🐩', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🦮', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🐈', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🦚', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🦜', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🦢', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🕊️', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🐇', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🦦', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🐿️', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🐉', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🌴', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🌱', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '☘️', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🍀', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🍄', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🌿', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🪴', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🍁', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '💐', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🌷', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🌹', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🌸', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🌻', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '⭐', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🌟', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🍏', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🍎', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🍐', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🍊', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🍋', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🍓', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🫐', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🍈', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🍒', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🥭', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🍍', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🥝', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🍅', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🥦', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🥕', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🥐', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🥯', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🍞', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🥖', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🥨', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🧀', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🥞', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🧇', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🥓', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🍔', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🍟', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🍕', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🥗', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🍝', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🍜', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🍲', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🍛', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🍣', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🍱', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🥟', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🍤', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🍙', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🍚', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🍥', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🍦', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🧁', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🍭', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🍩', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🍪', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '☕️', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🍵', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '⚽️', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🏀', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🏈', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '⚾️', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🥎', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🎾', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🏐', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🏉', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🎱', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🏆', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🎨', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🎤', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🎧', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🎼', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🎹', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🥁', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🎷', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🎺', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🎸', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🪕', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🎻', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🎲', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '♟️', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🎮', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🚗', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🚙', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🚌', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🏎️', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🛻', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🚚', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🚛', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🚘', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🚀', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🚁', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🛶', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '⛵️', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🚤', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '⚓', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🏰', type: 'emoji' },
   { color: selectedThreadColors[0], emoji: '🎡', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '💎', type: 'emoji' },
   { color: selectedThreadColors[2], emoji: '🔮', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '💈', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🧸', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🎊', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🎉', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🪩', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🚂', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '🚆', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🚊', type: 'emoji' },
   { color: selectedThreadColors[1], emoji: '🛰️', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '🏠', type: 'emoji' },
   { color: selectedThreadColors[3], emoji: '⛰️', type: 'emoji' },
   { color: selectedThreadColors[4], emoji: '🏔️', type: 'emoji' },
   { color: selectedThreadColors[5], emoji: '🗻', type: 'emoji' },
   { color: selectedThreadColors[6], emoji: '🏛️', type: 'emoji' },
   { color: selectedThreadColors[7], emoji: '⛩️', type: 'emoji' },
   { color: selectedThreadColors[8], emoji: '🧲', type: 'emoji' },
   { color: selectedThreadColors[9], emoji: '🎁', type: 'emoji' },
 ];
 
 function getRandomDefaultEmojiAvatar(): ClientEmojiAvatar {
   const randomIndex = Math.floor(Math.random() * defaultEmojiAvatars.length);
   return defaultEmojiAvatars[randomIndex];
 }
 
 function getDefaultAvatar(hashKey: string, color?: string): ClientEmojiAvatar {
   let key = hashKey;
   if (key.startsWith(`${ashoatKeyserverID}|`)) {
     key = key.slice(`${ashoatKeyserverID}|`.length);
   }
 
   const avatarIndex = stringHash(key) % defaultEmojiAvatars.length;
 
   return {
     ...defaultEmojiAvatars[avatarIndex],
     color: color ? color : defaultEmojiAvatars[avatarIndex].color,
   };
 }
 
 function getAvatarForUser(user: ?GenericUserInfoWithAvatar): ClientAvatar {
   if (user?.avatar) {
     return user.avatar;
   }
 
   if (!user?.username) {
     return defaultAnonymousUserEmojiAvatar;
   }
 
   return getDefaultAvatar(user.username);
 }
 
 function getUserAvatarForThread(
-  threadInfo: RawThreadInfo | ThreadInfo,
+  threadInfo:
+    | RawThreadInfo
+    | ThreadInfo
+    | MinimallyEncodedRawThreadInfo
+    | MinimallyEncodedThreadInfo,
   viewerID: ?string,
   userInfos: UserInfos,
 ): ClientAvatar {
   if (threadInfo.type === threadTypes.PRIVATE) {
     invariant(viewerID, 'viewerID should be set for PRIVATE threads');
     return getAvatarForUser(userInfos[viewerID]);
   }
 
   invariant(
     threadInfo.type === threadTypes.PERSONAL,
     'threadInfo should be a PERSONAL type',
   );
 
   const memberInfos = threadOtherMembers(threadInfo.members, viewerID)
     .map(member => userInfos[member.id] && userInfos[member.id])
     .filter(Boolean);
 
   if (memberInfos.length === 0) {
     return defaultAnonymousUserEmojiAvatar;
   }
 
   return getAvatarForUser(memberInfos[0]);
 }
 
 function getAvatarForThread(
-  thread: RawThreadInfo | ThreadInfo,
-  containingThreadInfo: ?ThreadInfo,
+  thread:
+    | RawThreadInfo
+    | ThreadInfo
+    | MinimallyEncodedThreadInfo
+    | MinimallyEncodedRawThreadInfo,
+  containingThreadInfo: ?ThreadInfo | ?MinimallyEncodedThreadInfo,
 ): ClientAvatar {
   if (thread.avatar) {
     return thread.avatar;
   }
 
   if (containingThreadInfo && containingThreadInfo.id !== genesis.id) {
     return containingThreadInfo.avatar
       ? containingThreadInfo.avatar
       : getDefaultAvatar(containingThreadInfo.id, containingThreadInfo.color);
   }
 
   return getDefaultAvatar(thread.id, thread.color);
 }
 
-function useAvatarForThread(thread: RawThreadInfo | ThreadInfo): ClientAvatar {
+function useAvatarForThread(
+  thread:
+    | RawThreadInfo
+    | ThreadInfo
+    | MinimallyEncodedRawThreadInfo
+    | MinimallyEncodedThreadInfo,
+): ClientAvatar {
   const containingThreadID = thread.containingThreadID;
   const containingThreadInfo = useSelector(state =>
     containingThreadID ? threadInfoSelector(state)[containingThreadID] : null,
   );
 
   return getAvatarForThread(thread, containingThreadInfo);
 }
 
 function useENSResolvedAvatar(
   avatarInfo: ClientAvatar,
   userInfo: ?GenericUserInfoWithAvatar,
 ): ResolvedClientAvatar {
   const ethAddress = React.useMemo(
     () => getETHAddressForUserInfo(userInfo),
     [userInfo],
   );
 
   const ensAvatarURI = useENSAvatar(ethAddress);
 
   const resolvedAvatar = React.useMemo(() => {
     if (avatarInfo.type !== 'ens') {
       return avatarInfo;
     }
 
     if (ensAvatarURI) {
       return {
         type: 'image',
         uri: ensAvatarURI,
       };
     }
 
     return defaultAnonymousUserEmojiAvatar;
   }, [ensAvatarURI, avatarInfo]);
 
   return resolvedAvatar;
 }
 
 export {
   defaultAnonymousUserEmojiAvatar,
   defaultEmojiAvatars,
   getRandomDefaultEmojiAvatar,
   getDefaultAvatar,
   getAvatarForUser,
   getUserAvatarForThread,
   getAvatarForThread,
   useAvatarForThread,
   useENSResolvedAvatar,
 };
diff --git a/lib/shared/edit-messages-utils.js b/lib/shared/edit-messages-utils.js
index e6a04e421..385473a9d 100644
--- a/lib/shared/edit-messages-utils.js
+++ b/lib/shared/edit-messages-utils.js
@@ -1,85 +1,86 @@
 // @flow
 
 import * as React from 'react';
 
 import { threadIsPending, threadHasPermission } from './thread-utils.js';
 import {
   sendEditMessageActionTypes,
   useSendEditMessage,
 } from '../actions/message-actions.js';
 import type {
   SendEditMessageResult,
   RobotextMessageInfo,
   ComposableMessageInfo,
   RawMessageInfo,
 } from '../types/message-types';
 import { messageTypes } from '../types/message-types-enum.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import { threadPermissions } from '../types/thread-permission-types.js';
 import { type ThreadInfo } from '../types/thread-types.js';
 import { useDispatchActionPromise } from '../utils/action-utils.js';
 import { useSelector } from '../utils/redux-utils.js';
 
 function useEditMessage(): (
   messageID: string,
   newText: string,
 ) => Promise<SendEditMessageResult> {
   const callEditMessage = useSendEditMessage();
   const dispatchActionPromise = useDispatchActionPromise();
 
   return React.useCallback(
     (messageID, newText) => {
       const editMessagePromise = (async () => {
         const result = await callEditMessage({
           targetMessageID: messageID,
           text: newText,
         });
 
         return ({
           newMessageInfos: result.newMessageInfos,
         }: { +newMessageInfos: $ReadOnlyArray<RawMessageInfo> });
       })();
 
       dispatchActionPromise(sendEditMessageActionTypes, editMessagePromise);
 
       return editMessagePromise;
     },
     [dispatchActionPromise, callEditMessage],
   );
 }
 
 function useCanEditMessage(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   targetMessageInfo: ComposableMessageInfo | RobotextMessageInfo,
 ): boolean {
   const currentUserInfo = useSelector(state => state.currentUserInfo);
 
   if (targetMessageInfo.type !== messageTypes.TEXT) {
     return false;
   }
 
   if (!currentUserInfo || !currentUserInfo.id) {
     return false;
   }
 
   const currentUserId = currentUserInfo.id;
   const targetMessageCreatorId = targetMessageInfo.creator.id;
   if (currentUserId !== targetMessageCreatorId) {
     return false;
   }
 
   const hasPermission = threadHasPermission(
     threadInfo,
     threadPermissions.EDIT_MESSAGE,
   );
   return hasPermission;
 }
 
 function getMessageLabel(hasBeenEdited: ?boolean, threadID: string): ?string {
   const isPending = threadIsPending(threadID);
   if (hasBeenEdited && !isPending) {
     return 'Edited';
   }
   return null;
 }
 
 export { useCanEditMessage, useEditMessage, getMessageLabel };
diff --git a/lib/shared/inline-engagement-utils.js b/lib/shared/inline-engagement-utils.js
index 2a121bef6..7cfa2a63b 100644
--- a/lib/shared/inline-engagement-utils.js
+++ b/lib/shared/inline-engagement-utils.js
@@ -1,25 +1,28 @@
 // @flow
 
 import type { ReactionInfo } from '../selectors/chat-selectors.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import type { ThreadInfo } from '../types/thread-types.js';
 
-function getInlineEngagementSidebarText(threadInfo: ?ThreadInfo): string {
+function getInlineEngagementSidebarText(
+  threadInfo: ?ThreadInfo | ?MinimallyEncodedThreadInfo,
+): string {
   if (!threadInfo) {
     return '';
   }
   const repliesCount = threadInfo.repliesCount || 1;
   return `${repliesCount} ${repliesCount > 1 ? 'replies' : 'reply'}`;
 }
 
 function reactionsToRawString(reactions: ReactionInfo): string {
   const reactionStringParts = [];
 
   for (const reaction in reactions) {
     const reactionInfo = reactions[reaction];
     reactionStringParts.push(`${reaction}${reactionInfo.users.length}`);
   }
 
   return reactionStringParts.join('');
 }
 
 export { getInlineEngagementSidebarText, reactionsToRawString };
diff --git a/lib/shared/message-utils.js b/lib/shared/message-utils.js
index 2dcdcec4a..9e6a1110d 100644
--- a/lib/shared/message-utils.js
+++ b/lib/shared/message-utils.js
@@ -1,727 +1,735 @@
 // @flow
 
 import invariant from 'invariant';
 import _maxBy from 'lodash/fp/maxBy.js';
 import _orderBy from 'lodash/fp/orderBy.js';
 import * as React from 'react';
 
 import { codeBlockRegex, type ParserRules } from './markdown.js';
 import type { CreationSideEffectsFunc } from './messages/message-spec.js';
 import { messageSpecs } from './messages/message-specs.js';
 import { threadIsGroupChat } from './thread-utils.js';
 import { useStringForUser } from '../hooks/ens-cache.js';
 import { contentStringForMediaArray } from '../media/media-utils.js';
 import type { ChatMessageInfoItem } from '../selectors/chat-selectors.js';
 import { threadInfoSelector } from '../selectors/thread-selectors.js';
 import { userIDsToRelativeUserInfos } from '../selectors/user-selectors.js';
 import { type PlatformDetails, isWebPlatform } from '../types/device-types.js';
 import type { Media } from '../types/media-types.js';
 import { messageTypes } from '../types/message-types-enum.js';
 import {
   type MessageInfo,
   type RawMessageInfo,
   type RobotextMessageInfo,
   type RawMultimediaMessageInfo,
   type MessageData,
   type MessageTruncationStatus,
   type MultimediaMessageData,
   type MessageStore,
   type ComposableMessageInfo,
   messageTruncationStatus,
   type RawComposableMessageInfo,
   type ThreadMessageInfo,
 } from '../types/message-types.js';
 import type {
   EditMessageInfo,
   RawEditMessageInfo,
 } from '../types/messages/edit.js';
 import type { ImagesMessageData } from '../types/messages/images.js';
 import type { MediaMessageData } from '../types/messages/media.js';
 import type {
   RawReactionMessageInfo,
   ReactionMessageInfo,
 } from '../types/messages/reaction.js';
+import type {
+  MinimallyEncodedRawThreadInfo,
+  MinimallyEncodedThreadInfo,
+} from '../types/minimally-encoded-thread-permissions-types.js';
 import type { RawThreadInfo, ThreadInfo } from '../types/thread-types.js';
 import type { UserInfos } from '../types/user-types.js';
 import {
   type EntityText,
   ET,
   useEntityTextAsString,
 } from '../utils/entity-text.js';
 import { useSelector } from '../utils/redux-utils.js';
 
 const localIDPrefix = 'local';
 
 const defaultMediaMessageOptions = Object.freeze({});
 
 // Prefers localID
 function messageKey(messageInfo: MessageInfo | RawMessageInfo): string {
   if (messageInfo.localID) {
     return messageInfo.localID;
   }
   invariant(messageInfo.id, 'localID should exist if ID does not');
   return messageInfo.id;
 }
 
 // Prefers serverID
 function messageID(messageInfo: MessageInfo | RawMessageInfo): string {
   if (messageInfo.id) {
     return messageInfo.id;
   }
   invariant(messageInfo.localID, 'localID should exist if ID does not');
   return messageInfo.localID;
 }
 
 function robotextForMessageInfo(
   messageInfo: RobotextMessageInfo,
   threadInfo: ?ThreadInfo,
   parentThreadInfo: ?ThreadInfo,
 ): EntityText {
   const messageSpec = messageSpecs[messageInfo.type];
   invariant(
     messageSpec.robotext,
     `we're not aware of messageType ${messageInfo.type}`,
   );
   return messageSpec.robotext(messageInfo, { threadInfo, parentThreadInfo });
 }
 
 function createMessageInfo(
   rawMessageInfo: RawMessageInfo,
   viewerID: ?string,
   userInfos: UserInfos,
   threadInfos: { +[id: string]: ThreadInfo },
 ): ?MessageInfo {
   const creatorInfo = userInfos[rawMessageInfo.creatorID];
   const creator = {
     id: rawMessageInfo.creatorID,
     username: creatorInfo ? creatorInfo.username : 'anonymous',
     isViewer: rawMessageInfo.creatorID === viewerID,
   };
 
   const createRelativeUserInfos = (userIDs: $ReadOnlyArray<string>) =>
     userIDsToRelativeUserInfos(userIDs, viewerID, userInfos);
   const createMessageInfoFromRaw = (rawInfo: RawMessageInfo) =>
     createMessageInfo(rawInfo, viewerID, userInfos, threadInfos);
 
   const messageSpec = messageSpecs[rawMessageInfo.type];
 
   return messageSpec.createMessageInfo(rawMessageInfo, creator, {
     threadInfos,
     createMessageInfoFromRaw,
     createRelativeUserInfos,
   });
 }
 
 type LengthResult = {
   +local: number,
   +realized: number,
 };
 function findMessageIDMaxLengths(
   messageIDs: $ReadOnlyArray<?string>,
 ): LengthResult {
   const result = {
     local: 0,
     realized: 0,
   };
   for (const id of messageIDs) {
     if (!id) {
       continue;
     }
     if (id.startsWith(localIDPrefix)) {
       result.local = Math.max(result.local, id.length - localIDPrefix.length);
     } else {
       result.realized = Math.max(result.realized, id.length);
     }
   }
   return result;
 }
 
 function extendMessageID(id: ?string, lengths: LengthResult): ?string {
   if (!id) {
     return id;
   }
   if (id.startsWith(localIDPrefix)) {
     const zeroPaddedID = id
       .substr(localIDPrefix.length)
       .padStart(lengths.local, '0');
     return `${localIDPrefix}${zeroPaddedID}`;
   }
   return id.padStart(lengths.realized, '0');
 }
 
 function sortMessageInfoList<T: MessageInfo | RawMessageInfo>(
   messageInfos: $ReadOnlyArray<T>,
 ): T[] {
   const lengths = findMessageIDMaxLengths(
     messageInfos.map(message => message?.id),
   );
   return _orderBy([
     'time',
     (message: T) => extendMessageID(message?.id, lengths),
   ])(['desc', 'desc'])(messageInfos);
 }
 
 const sortMessageIDs: (messages: { +[id: string]: RawMessageInfo }) => (
   messageIDs: $ReadOnlyArray<string>,
 ) => string[] = messages => messageIDs => {
   const lengths = findMessageIDMaxLengths(messageIDs);
   return _orderBy([
     (id: string) => messages[id].time,
     (id: string) => extendMessageID(id, lengths),
   ])(['desc', 'desc'])(messageIDs);
 };
 
 function rawMessageInfoFromMessageData(
   messageData: MessageData,
   id: ?string,
 ): RawMessageInfo {
   const messageSpec = messageSpecs[messageData.type];
   invariant(
     messageSpec.rawMessageInfoFromMessageData,
     `we're not aware of messageType ${messageData.type}`,
   );
   return messageSpec.rawMessageInfoFromMessageData(messageData, id);
 }
 
 function mostRecentMessageTimestamp(
   messageInfos: $ReadOnlyArray<RawMessageInfo>,
   previousTimestamp: number,
 ): number {
   if (messageInfos.length === 0) {
     return previousTimestamp;
   }
   return _maxBy('time')(messageInfos).time;
 }
 
 function usersInMessageInfos(
   messageInfos: $ReadOnlyArray<MessageInfo | RawMessageInfo>,
 ): string[] {
   const userIDs = new Set();
   for (const messageInfo of messageInfos) {
     if (messageInfo.creatorID) {
       userIDs.add(messageInfo.creatorID);
     } else if (messageInfo.creator) {
       userIDs.add(messageInfo.creator.id);
     }
   }
   return [...userIDs];
 }
 
 function combineTruncationStatuses(
   first: MessageTruncationStatus,
   second: ?MessageTruncationStatus,
 ): MessageTruncationStatus {
   if (
     first === messageTruncationStatus.EXHAUSTIVE ||
     second === messageTruncationStatus.EXHAUSTIVE
   ) {
     return messageTruncationStatus.EXHAUSTIVE;
   } else if (
     first === messageTruncationStatus.UNCHANGED &&
     second !== null &&
     second !== undefined
   ) {
     return second;
   } else {
     return first;
   }
 }
 
 function shimUnsupportedRawMessageInfos(
   rawMessageInfos: $ReadOnlyArray<RawMessageInfo>,
   platformDetails: ?PlatformDetails,
 ): RawMessageInfo[] {
   if (platformDetails && isWebPlatform(platformDetails.platform)) {
     return [...rawMessageInfos];
   }
   return rawMessageInfos.map(rawMessageInfo => {
     const { shimUnsupportedMessageInfo } = messageSpecs[rawMessageInfo.type];
     if (shimUnsupportedMessageInfo) {
       return shimUnsupportedMessageInfo(rawMessageInfo, platformDetails);
     }
     return rawMessageInfo;
   });
 }
 
 type MediaMessageDataCreationInput = {
   +threadID: string,
   +creatorID: string,
   +media: $ReadOnlyArray<Media>,
   +localID?: ?string,
   +time?: ?number,
   +sidebarCreation?: ?boolean,
   ...
 };
 function createMediaMessageData(
   input: MediaMessageDataCreationInput,
   options: {
     +forceMultimediaMessageType?: boolean,
   } = defaultMediaMessageOptions,
 ): MultimediaMessageData {
   let allMediaArePhotos = true;
   const photoMedia = [];
   for (const singleMedia of input.media) {
     if (singleMedia.type !== 'photo') {
       allMediaArePhotos = false;
       break;
     } else {
       photoMedia.push(singleMedia);
     }
   }
 
   const { localID, threadID, creatorID, sidebarCreation } = input;
   const { forceMultimediaMessageType = false } = options;
   const time = input.time ? input.time : Date.now();
   let messageData;
   if (allMediaArePhotos && !forceMultimediaMessageType) {
     messageData = ({
       type: messageTypes.IMAGES,
       threadID,
       creatorID,
       time,
       media: photoMedia,
     }: ImagesMessageData);
     if (localID) {
       messageData = { ...messageData, localID };
     }
     if (sidebarCreation) {
       messageData = { ...messageData, sidebarCreation };
     }
   } else {
     messageData = ({
       type: messageTypes.MULTIMEDIA,
       threadID,
       creatorID,
       time,
       media: input.media,
     }: MediaMessageData);
     if (localID) {
       messageData = { ...messageData, localID };
     }
     if (sidebarCreation) {
       messageData = { ...messageData, sidebarCreation };
     }
   }
   return messageData;
 }
 
 type MediaMessageInfoCreationInput = {
   ...$Exact<MediaMessageDataCreationInput>,
   +id?: ?string,
 };
 function createMediaMessageInfo(
   input: MediaMessageInfoCreationInput,
   options: {
     +forceMultimediaMessageType?: boolean,
   } = defaultMediaMessageOptions,
 ): RawMultimediaMessageInfo {
   const messageData = createMediaMessageData(input, options);
   const createRawMessageInfo =
     messageSpecs[messageData.type].rawMessageInfoFromMessageData;
   invariant(
     createRawMessageInfo,
     'multimedia message spec should have rawMessageInfoFromMessageData',
   );
   const result = createRawMessageInfo(messageData, input.id);
   invariant(
     result.type === messageTypes.MULTIMEDIA ||
       result.type === messageTypes.IMAGES,
     `media messageSpec returned MessageType ${result.type}`,
   );
   return result;
 }
 
 function stripLocalID(
   rawMessageInfo:
     | RawComposableMessageInfo
     | RawReactionMessageInfo
     | RawEditMessageInfo,
 ) {
   const { localID, ...rest } = rawMessageInfo;
   return rest;
 }
 
 function stripLocalIDs(
   input: $ReadOnlyArray<RawMessageInfo>,
 ): RawMessageInfo[] {
   const output = [];
   for (const rawMessageInfo of input) {
     if (rawMessageInfo.localID) {
       invariant(
         rawMessageInfo.id,
         'serverID should be set if localID is being stripped',
       );
       output.push(stripLocalID(rawMessageInfo));
     } else {
       output.push(rawMessageInfo);
     }
   }
   return output;
 }
 
 // Normally we call trim() to remove whitespace at the beginning and end of each
 // message. However, our Markdown parser supports a "codeBlock" format where the
 // user can indent each line to indicate a code block. If we match the
 // corresponding RegEx, we'll only trim whitespace off the end.
 function trimMessage(message: string): string {
   message = message.replace(/^\n*/, '');
   return codeBlockRegex.exec(message) ? message.trimEnd() : message.trim();
 }
 
 function createMessageQuote(message: string): string {
   // add `>` to each line to include empty lines in the quote
   return message.replace(/^/gm, '> ');
 }
 
 function createMessageReply(message: string): string {
   return createMessageQuote(message) + '\n\n';
 }
 
 function getMostRecentNonLocalMessageID(
   threadID: string,
   messageStore: MessageStore,
 ): ?string {
   const thread = messageStore.threads[threadID];
   return thread?.messageIDs.find(id => !id.startsWith(localIDPrefix));
 }
 
 function getOldestNonLocalMessageID(
   threadID: string,
   messageStore: MessageStore,
 ): ?string {
   const thread = messageStore.threads[threadID];
   if (!thread) {
     return thread;
   }
   const { messageIDs } = thread;
   for (let i = messageIDs.length - 1; i >= 0; i--) {
     const id = messageIDs[i];
     if (!id.startsWith(localIDPrefix)) {
       return id;
     }
   }
   return undefined;
 }
 
 function getMessageTitle(
   messageInfo:
     | ComposableMessageInfo
     | RobotextMessageInfo
     | ReactionMessageInfo
     | EditMessageInfo,
   threadInfo: ThreadInfo,
   parentThreadInfo: ?ThreadInfo,
   markdownRules: ParserRules,
 ): EntityText {
   const { messageTitle } = messageSpecs[messageInfo.type];
   if (messageTitle) {
     return messageTitle({ messageInfo, threadInfo, markdownRules });
   }
 
   invariant(
     messageInfo.type !== messageTypes.TEXT &&
       messageInfo.type !== messageTypes.IMAGES &&
       messageInfo.type !== messageTypes.MULTIMEDIA &&
       messageInfo.type !== messageTypes.REACTION &&
       messageInfo.type !== messageTypes.EDIT_MESSAGE,
     'messageTitle can only be auto-generated for RobotextMessageInfo',
   );
   return robotextForMessageInfo(messageInfo, threadInfo, parentThreadInfo);
 }
 
 function mergeThreadMessageInfos(
   first: ThreadMessageInfo,
   second: ThreadMessageInfo,
   messages: { +[id: string]: RawMessageInfo },
 ): ThreadMessageInfo {
   let firstPointer = 0;
   let secondPointer = 0;
   const mergedMessageIDs = [];
   let firstCandidate = first.messageIDs[firstPointer];
   let secondCandidate = second.messageIDs[secondPointer];
   while (firstCandidate !== undefined || secondCandidate !== undefined) {
     if (firstCandidate === undefined) {
       mergedMessageIDs.push(secondCandidate);
       secondPointer++;
     } else if (secondCandidate === undefined) {
       mergedMessageIDs.push(firstCandidate);
       firstPointer++;
     } else if (firstCandidate === secondCandidate) {
       mergedMessageIDs.push(firstCandidate);
       firstPointer++;
       secondPointer++;
     } else {
       const firstMessage = messages[firstCandidate];
       const secondMessage = messages[secondCandidate];
       invariant(
         firstMessage && secondMessage,
         'message in messageIDs not present in MessageStore',
       );
       if (
         (firstMessage.id &&
           secondMessage.id &&
           firstMessage.id === secondMessage.id) ||
         (firstMessage.localID &&
           secondMessage.localID &&
           firstMessage.localID === secondMessage.localID)
       ) {
         mergedMessageIDs.push(firstCandidate);
         firstPointer++;
         secondPointer++;
       } else if (firstMessage.time < secondMessage.time) {
         mergedMessageIDs.push(secondCandidate);
         secondPointer++;
       } else {
         mergedMessageIDs.push(firstCandidate);
         firstPointer++;
       }
     }
     firstCandidate = first.messageIDs[firstPointer];
     secondCandidate = second.messageIDs[secondPointer];
   }
   return {
     messageIDs: mergedMessageIDs,
     startReached: first.startReached && second.startReached,
   };
 }
 
 type MessagePreviewPart = {
   +text: string,
   // unread has highest contrast, followed by primary, followed by secondary
   +style: 'unread' | 'primary' | 'secondary',
 };
 export type MessagePreviewResult = {
   +message: MessagePreviewPart,
   +username: ?MessagePreviewPart,
 };
 function useMessagePreview(
   originalMessageInfo: ?MessageInfo,
   threadInfo: ThreadInfo,
   markdownRules: ParserRules,
 ): ?MessagePreviewResult {
   let messageInfo;
   if (
     originalMessageInfo &&
     originalMessageInfo.type === messageTypes.SIDEBAR_SOURCE
   ) {
     messageInfo = originalMessageInfo.sourceMessage;
   } else {
     messageInfo = originalMessageInfo;
   }
 
   const { parentThreadID } = threadInfo;
   const parentThreadInfo = useSelector(state =>
     parentThreadID ? threadInfoSelector(state)[parentThreadID] : null,
   );
 
   const hasUsername =
     threadIsGroupChat(threadInfo) ||
     threadInfo.name !== '' ||
     messageInfo?.creator.isViewer;
   const shouldDisplayUser =
     messageInfo?.type === messageTypes.TEXT && hasUsername;
 
   const stringForUser = useStringForUser(
     shouldDisplayUser ? messageInfo?.creator : null,
   );
 
   const { unread } = threadInfo.currentUser;
   const username = React.useMemo(() => {
     if (!shouldDisplayUser) {
       return null;
     }
     invariant(
       stringForUser,
       'useStringForUser should only return falsey if pass null or undefined',
     );
     return {
       text: stringForUser,
       style: unread ? 'unread' : 'secondary',
     };
   }, [shouldDisplayUser, stringForUser, unread]);
 
   const messageTitleEntityText = React.useMemo(() => {
     if (!messageInfo) {
       return messageInfo;
     }
     return getMessageTitle(
       messageInfo,
       threadInfo,
       parentThreadInfo,
       markdownRules,
     );
   }, [messageInfo, threadInfo, parentThreadInfo, markdownRules]);
 
   const threadID = threadInfo.id;
   const entityTextToStringParams = React.useMemo(
     () => ({
       threadID,
     }),
     [threadID],
   );
   const messageTitle = useEntityTextAsString(
     messageTitleEntityText,
     entityTextToStringParams,
   );
 
   const isTextMessage = messageInfo?.type === messageTypes.TEXT;
   const message = React.useMemo(() => {
     if (messageTitle === null || messageTitle === undefined) {
       return messageTitle;
     }
 
     let style;
     if (unread) {
       style = 'unread';
     } else if (isTextMessage) {
       style = 'primary';
     } else {
       style = 'secondary';
     }
 
     return { text: messageTitle, style };
   }, [messageTitle, unread, isTextMessage]);
 
   return React.useMemo(() => {
     if (!message) {
       return message;
     }
     return { message, username };
   }, [message, username]);
 }
 
 function useMessageCreationSideEffectsFunc<Info: RawMessageInfo>(
   messageType: $PropertyType<Info, 'type'>,
 ): CreationSideEffectsFunc<Info> {
   const messageSpec = messageSpecs[messageType];
   invariant(messageSpec, `we're not aware of messageType ${messageType}`);
   invariant(
     messageSpec.useCreationSideEffectsFunc,
     `no useCreationSideEffectsFunc in message spec for ${messageType}`,
   );
   return messageSpec.useCreationSideEffectsFunc();
 }
 
 function getPinnedContentFromMessage(targetMessage: RawMessageInfo): string {
   let pinnedContent;
   if (
     targetMessage.type === messageTypes.IMAGES ||
     targetMessage.type === messageTypes.MULTIMEDIA
   ) {
     pinnedContent = contentStringForMediaArray(targetMessage.media);
   } else {
     pinnedContent = 'a message';
   }
 
   return pinnedContent;
 }
 
 function modifyItemForResultScreen(
   item: ChatMessageInfoItem,
 ): ChatMessageInfoItem {
   if (item.messageInfoType === 'composable') {
     return {
       ...item,
       startsConversation: false,
       startsCluster: true,
       endsCluster: true,
       messageInfo: {
         ...item.messageInfo,
         creator: {
           ...item.messageInfo.creator,
           isViewer: false,
         },
       },
     };
   }
   return item;
 }
 
 function constructChangeRoleEntityText(
   affectedUsers: EntityText | string,
   roleName: ?string,
 ): EntityText {
   if (!roleName) {
     return ET`assigned ${affectedUsers} a new role`;
   }
 
   return ET`assigned ${affectedUsers} the "${roleName}" role`;
 }
 
 function useNextLocalID(): string {
   const nextLocalID = useSelector(state => state.nextLocalID);
   return `${localIDPrefix}${nextLocalID}`;
 }
 
 function isInvalidSidebarSource(
   message: RawMessageInfo | MessageInfo,
 ): boolean %checks {
   return (
     (message.type === messageTypes.REACTION ||
       message.type === messageTypes.EDIT_MESSAGE ||
       message.type === messageTypes.SIDEBAR_SOURCE ||
       message.type === messageTypes.TOGGLE_PIN) &&
     !messageSpecs[message.type].canBeSidebarSource
   );
 }
 
 // Prefer checking isInvalidPinSourceForThread below. This function doesn't
 // check whether the user is attempting to pin a SIDEBAR_SOURCE in the context
 // of its parent thread, so it's not suitable for permission checks. We only
 // use it in the message-fetchers.js code where we don't have access to the
 // RawThreadInfo and don't need to do permission checks.
 function isInvalidPinSource(
   messageInfo: RawMessageInfo | MessageInfo,
 ): boolean {
   return !messageSpecs[messageInfo.type].canBePinned;
 }
 
 function isInvalidPinSourceForThread(
   messageInfo: RawMessageInfo | MessageInfo,
-  threadInfo: RawThreadInfo | ThreadInfo,
+  threadInfo:
+    | RawThreadInfo
+    | ThreadInfo
+    | MinimallyEncodedRawThreadInfo
+    | MinimallyEncodedThreadInfo,
 ): boolean {
   const isValidPinSource = !isInvalidPinSource(messageInfo);
   const isFirstMessageInSidebar = threadInfo.sourceMessageID === messageInfo.id;
   return !isValidPinSource || isFirstMessageInSidebar;
 }
 
 function isUnableToBeRenderedIndependently(
   message: RawMessageInfo | MessageInfo,
 ): boolean {
   return !messageSpecs[message.type].canBeRenderedIndependently;
 }
 
 export {
   localIDPrefix,
   messageKey,
   messageID,
   robotextForMessageInfo,
   createMessageInfo,
   sortMessageInfoList,
   sortMessageIDs,
   rawMessageInfoFromMessageData,
   mostRecentMessageTimestamp,
   usersInMessageInfos,
   combineTruncationStatuses,
   shimUnsupportedRawMessageInfos,
   createMediaMessageData,
   createMediaMessageInfo,
   stripLocalIDs,
   trimMessage,
   createMessageQuote,
   createMessageReply,
   getMostRecentNonLocalMessageID,
   getOldestNonLocalMessageID,
   getMessageTitle,
   mergeThreadMessageInfos,
   useMessagePreview,
   useMessageCreationSideEffectsFunc,
   getPinnedContentFromMessage,
   modifyItemForResultScreen,
   constructChangeRoleEntityText,
   useNextLocalID,
   isInvalidSidebarSource,
   isInvalidPinSource,
   isInvalidPinSourceForThread,
   isUnableToBeRenderedIndependently,
 };
diff --git a/lib/shared/notif-utils.js b/lib/shared/notif-utils.js
index 54ab706b0..2dd617bc2 100644
--- a/lib/shared/notif-utils.js
+++ b/lib/shared/notif-utils.js
@@ -1,323 +1,324 @@
 // @flow
 
 import invariant from 'invariant';
 
 import { isUserMentioned } from './mention-utils.js';
 import { robotextForMessageInfo } from './message-utils.js';
 import type { NotificationTextsParams } from './messages/message-spec.js';
 import { messageSpecs } from './messages/message-specs.js';
 import { threadNoun } from './thread-utils.js';
 import { type MessageType, messageTypes } from '../types/message-types-enum.js';
 import {
   type MessageInfo,
   type RawMessageInfo,
   type RobotextMessageInfo,
   type MessageData,
   type SidebarSourceMessageInfo,
 } from '../types/message-types.js';
 import type { CreateSidebarMessageInfo } from '../types/messages/create-sidebar.js';
 import type { TextMessageInfo } from '../types/messages/text.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import type { NotifTexts, ResolvedNotifTexts } from '../types/notif-types.js';
 import { type ThreadType, threadTypes } from '../types/thread-types-enum.js';
 import { type ThreadInfo } from '../types/thread-types.js';
 import type { RelativeUserInfo, UserInfo } from '../types/user-types.js';
 import { prettyDate } from '../utils/date-utils.js';
 import type { GetENSNames } from '../utils/ens-helpers.js';
 import {
   ET,
   getEntityTextAsString,
   type EntityText,
   type ThreadEntity,
 } from '../utils/entity-text.js';
 import { promiseAll } from '../utils/promises.js';
 import { trimText } from '../utils/text-utils.js';
 
 async function notifTextsForMessageInfo(
   messageInfos: MessageInfo[],
   threadInfo: ThreadInfo,
   parentThreadInfo: ?ThreadInfo,
   notifTargetUserInfo: UserInfo,
   getENSNames: ?GetENSNames,
 ): Promise<?ResolvedNotifTexts> {
   const fullNotifTexts = await fullNotifTextsForMessageInfo(
     messageInfos,
     threadInfo,
     parentThreadInfo,
     notifTargetUserInfo,
     getENSNames,
   );
   if (!fullNotifTexts) {
     return fullNotifTexts;
   }
   const merged = trimText(fullNotifTexts.merged, 300);
   const body = trimText(fullNotifTexts.body, 300);
   const title = trimText(fullNotifTexts.title, 100);
   if (!fullNotifTexts.prefix) {
     return { merged, body, title };
   }
   const prefix = trimText(fullNotifTexts.prefix, 50);
   return { merged, body, title, prefix };
 }
 
 function notifTextsForEntryCreationOrEdit(
   messageInfos: $ReadOnlyArray<MessageInfo>,
   threadInfo: ThreadInfo,
 ): NotifTexts {
   const hasCreateEntry = messageInfos.some(
     messageInfo => messageInfo.type === messageTypes.CREATE_ENTRY,
   );
   const messageInfo = messageInfos[0];
 
   const thread = ET.thread({ display: 'shortName', threadInfo });
   const creator = ET.user({ userInfo: messageInfo.creator });
   const prefix = ET`${creator}`;
 
   if (!hasCreateEntry) {
     invariant(
       messageInfo.type === messageTypes.EDIT_ENTRY,
       'messageInfo should be messageTypes.EDIT_ENTRY!',
     );
     const date = prettyDate(messageInfo.date);
     let body = ET`updated the text of an event in ${thread}`;
     body = ET`${body} scheduled for ${date}: "${messageInfo.text}"`;
     const merged = ET`${prefix} ${body}`;
     return {
       merged,
       title: threadInfo.uiName,
       body,
       prefix,
     };
   }
   invariant(
     messageInfo.type === messageTypes.CREATE_ENTRY ||
       messageInfo.type === messageTypes.EDIT_ENTRY,
     'messageInfo should be messageTypes.CREATE_ENTRY/EDIT_ENTRY!',
   );
   const date = prettyDate(messageInfo.date);
   let body = ET`created an event in ${thread}`;
   body = ET`${body} scheduled for ${date}: "${messageInfo.text}"`;
   const merged = ET`${prefix} ${body}`;
   return {
     merged,
     title: threadInfo.uiName,
     body,
     prefix,
   };
 }
 
 type NotifTextsForSubthreadCreationInput = {
   +creator: RelativeUserInfo,
   +threadType: ThreadType,
-  +parentThreadInfo: ThreadInfo,
+  +parentThreadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   +childThreadName: ?string,
   +childThreadUIName: string | ThreadEntity,
 };
 function notifTextsForSubthreadCreation(
   input: NotifTextsForSubthreadCreationInput,
 ): NotifTexts {
   const {
     creator,
     threadType,
     parentThreadInfo,
     childThreadName,
     childThreadUIName,
   } = input;
 
   const prefix = ET`${ET.user({ userInfo: creator })}`;
 
   let body = `created a new ${threadNoun(threadType, parentThreadInfo.id)}`;
   if (parentThreadInfo.name && parentThreadInfo.type !== threadTypes.GENESIS) {
     body = ET`${body} in ${parentThreadInfo.name}`;
   }
 
   let merged = ET`${prefix} ${body}`;
   if (childThreadName) {
     merged = ET`${merged} called "${childThreadName}"`;
   }
 
   return {
     merged,
     body,
     title: childThreadUIName,
     prefix,
   };
 }
 
 type NotifTextsForSidebarCreationInput = {
   +createSidebarMessageInfo: CreateSidebarMessageInfo,
   +sidebarSourceMessageInfo?: ?SidebarSourceMessageInfo,
   +firstSidebarMessageInfo?: ?TextMessageInfo,
-  +threadInfo: ThreadInfo,
+  +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   +params: NotificationTextsParams,
 };
 function notifTextsForSidebarCreation(
   input: NotifTextsForSidebarCreationInput,
 ): NotifTexts {
   const {
     sidebarSourceMessageInfo,
     createSidebarMessageInfo,
     firstSidebarMessageInfo,
     threadInfo,
     params,
   } = input;
 
   const creator = ET.user({ userInfo: createSidebarMessageInfo.creator });
   const prefix = ET`${creator}`;
 
   const initialName = createSidebarMessageInfo.initialThreadState.name;
   const sourceMessageAuthorPossessive = ET.user({
     userInfo: createSidebarMessageInfo.sourceMessageAuthor,
     possessive: true,
   });
 
   let body = 'started a thread in response to';
   body = ET`${body} ${sourceMessageAuthorPossessive} message`;
 
   const { username } = params.notifTargetUserInfo;
 
   if (
     username &&
     sidebarSourceMessageInfo &&
     sidebarSourceMessageInfo.sourceMessage.type === messageTypes.TEXT &&
     isUserMentioned(username, sidebarSourceMessageInfo.sourceMessage.text)
   ) {
     body = ET`${body} that tagged you`;
   } else if (
     username &&
     firstSidebarMessageInfo &&
     isUserMentioned(username, firstSidebarMessageInfo.text)
   ) {
     body = ET`${body} and tagged you`;
   } else if (initialName) {
     body = ET`${body} "${initialName}"`;
   }
 
   return {
     merged: ET`${prefix} ${body}`,
     body,
     title: threadInfo.uiName,
     prefix,
   };
 }
 
 function mostRecentMessageInfoType(
   messageInfos: $ReadOnlyArray<MessageInfo>,
 ): MessageType {
   if (messageInfos.length === 0) {
     throw new Error('expected MessageInfo, but none present!');
   }
   return messageInfos[0].type;
 }
 
 async function fullNotifTextsForMessageInfo(
   messageInfos: $ReadOnlyArray<MessageInfo>,
   threadInfo: ThreadInfo,
   parentThreadInfo: ?ThreadInfo,
   notifTargetUserInfo: UserInfo,
   getENSNames: ?GetENSNames,
 ): Promise<?ResolvedNotifTexts> {
   const mostRecentType = mostRecentMessageInfoType(messageInfos);
   const messageSpec = messageSpecs[mostRecentType];
   invariant(
     messageSpec.notificationTexts,
     `we're not aware of messageType ${mostRecentType}`,
   );
   const unresolvedNotifTexts = await messageSpec.notificationTexts(
     messageInfos,
     threadInfo,
     { notifTargetUserInfo, parentThreadInfo },
   );
   if (!unresolvedNotifTexts) {
     return unresolvedNotifTexts;
   }
 
   const resolveToString = async (
     entityText: string | EntityText,
   ): Promise<string> => {
     if (typeof entityText === 'string') {
       return entityText;
     }
     const notifString = await getEntityTextAsString(entityText, getENSNames, {
       prefixThisThreadNounWith: 'your',
     });
     invariant(
       notifString !== null && notifString !== undefined,
       'getEntityTextAsString only returns falsey when passed falsey',
     );
     return notifString;
   };
   let promises = {
     merged: resolveToString(unresolvedNotifTexts.merged),
     body: resolveToString(unresolvedNotifTexts.body),
     title: resolveToString(ET`${unresolvedNotifTexts.title}`),
   };
   if (unresolvedNotifTexts.prefix) {
     promises = {
       ...promises,
       prefix: resolveToString(unresolvedNotifTexts.prefix),
     };
   }
   return await promiseAll(promises);
 }
 
 function notifRobotextForMessageInfo(
   messageInfo: RobotextMessageInfo,
   threadInfo: ThreadInfo,
   parentThreadInfo: ?ThreadInfo,
 ): EntityText {
   const robotext = robotextForMessageInfo(
     messageInfo,
     threadInfo,
     parentThreadInfo,
   );
   return robotext.map(entity => {
     if (
       typeof entity !== 'string' &&
       entity.type === 'thread' &&
       entity.id === threadInfo.id
     ) {
       return ET.thread({
         display: 'shortName',
         threadInfo,
         possessive: entity.possessive,
       });
     }
     return entity;
   });
 }
 
 function getNotifCollapseKey(
   rawMessageInfo: RawMessageInfo,
   messageData: MessageData,
 ): ?string {
   const messageSpec = messageSpecs[rawMessageInfo.type];
   return (
     messageSpec.notificationCollapseKey?.(rawMessageInfo, messageData) ?? null
   );
 }
 
 type Unmerged = $ReadOnly<{
   body: string,
   title: string,
   prefix?: string,
   ...
 }>;
 type Merged = {
   body: string,
   title: string,
 };
 function mergePrefixIntoBody(unmerged: Unmerged): Merged {
   const { body, title, prefix } = unmerged;
   const merged = prefix ? `${prefix} ${body}` : body;
   return { body: merged, title };
 }
 
 export {
   notifRobotextForMessageInfo,
   notifTextsForMessageInfo,
   notifTextsForEntryCreationOrEdit,
   notifTextsForSubthreadCreation,
   notifTextsForSidebarCreation,
   getNotifCollapseKey,
   mergePrefixIntoBody,
 };
diff --git a/lib/shared/reaction-utils.js b/lib/shared/reaction-utils.js
index 6e0e17eab..add397ac4 100644
--- a/lib/shared/reaction-utils.js
+++ b/lib/shared/reaction-utils.js
@@ -1,109 +1,110 @@
 // @flow
 
 import _sortBy from 'lodash/fp/sortBy.js';
 import * as React from 'react';
 
 import { relationshipBlockedInEitherDirection } from './relationship-utils.js';
 import { threadHasPermission } from './thread-utils.js';
 import { stringForUserExplicit } from './user-utils.js';
 import { useENSNames } from '../hooks/ens-cache.js';
 import type { ReactionInfo } from '../selectors/chat-selectors.js';
 import type {
   RobotextMessageInfo,
   ComposableMessageInfo,
 } from '../types/message-types.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import { threadPermissions } from '../types/thread-permission-types.js';
 import { type ThreadInfo } from '../types/thread-types.js';
 import { useSelector } from '../utils/redux-utils.js';
 
 function useViewerAlreadySelectedMessageReactions(
   reactions: ReactionInfo,
 ): $ReadOnlyArray<string> {
   return React.useMemo(() => {
     const alreadySelectedEmojis = [];
 
     for (const reaction in reactions) {
       const reactionInfo = reactions[reaction];
 
       if (reactionInfo.viewerReacted) {
         alreadySelectedEmojis.push(reaction);
       }
     }
 
     return alreadySelectedEmojis;
   }, [reactions]);
 }
 
 export type MessageReactionListInfo = {
   +id: string,
   +isViewer: boolean,
   +reaction: string,
   +username: string,
 };
 
 function useMessageReactionsList(
   reactions: ReactionInfo,
 ): $ReadOnlyArray<MessageReactionListInfo> {
   const withoutENSNames = React.useMemo(() => {
     const result = [];
 
     for (const reaction in reactions) {
       const reactionInfo = reactions[reaction];
 
       reactionInfo.users.forEach(user => {
         result.push({
           ...user,
           username: stringForUserExplicit(user),
           reaction,
         });
       });
     }
 
     const sortByNumReactions = (reactionInfo: MessageReactionListInfo) => {
       const numOfReactions = reactions[reactionInfo.reaction].users.length;
       return numOfReactions ? -numOfReactions : 0;
     };
 
     return _sortBy(
       ([sortByNumReactions, 'username']: $ReadOnlyArray<
         ((reactionInfo: MessageReactionListInfo) => mixed) | string,
       >),
     )(result);
   }, [reactions]);
   return useENSNames<MessageReactionListInfo>(withoutENSNames);
 }
 
 function useCanCreateReactionFromMessage(
-  threadInfo: ThreadInfo,
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   targetMessageInfo: ComposableMessageInfo | RobotextMessageInfo,
 ): boolean {
   const targetMessageCreatorRelationship = useSelector(
     state =>
       state.userStore.userInfos[targetMessageInfo.creator.id]
         ?.relationshipStatus,
   );
 
   if (
     !targetMessageInfo.id ||
     threadInfo.sourceMessageID === targetMessageInfo.id
   ) {
     return false;
   }
 
   const creatorRelationshipHasBlock =
     targetMessageCreatorRelationship &&
     relationshipBlockedInEitherDirection(targetMessageCreatorRelationship);
 
   const hasPermission = threadHasPermission(
     threadInfo,
     threadPermissions.REACT_TO_MESSAGE,
   );
 
   return hasPermission && !creatorRelationshipHasBlock;
 }
 
 export {
   useViewerAlreadySelectedMessageReactions,
   useMessageReactionsList,
   useCanCreateReactionFromMessage,
 };
diff --git a/lib/shared/search-utils.js b/lib/shared/search-utils.js
index c32c8f4b7..4e7137ed4 100644
--- a/lib/shared/search-utils.js
+++ b/lib/shared/search-utils.js
@@ -1,346 +1,347 @@
 // @flow
 
 import * as React from 'react';
 import { useSelector } from 'react-redux';
 
 import SearchIndex from './search-index.js';
 import {
   userIsMember,
   threadMemberHasPermission,
   getContainingThreadID,
 } from './thread-utils.js';
 import {
   useSearchMessages as useSearchMessagesAction,
   searchMessagesActionTypes,
 } from '../actions/message-actions.js';
 import {
   searchUsers,
   searchUsersActionTypes,
 } from '../actions/user-actions.js';
 import genesis from '../facts/genesis.js';
 import type {
   ChatMessageInfoItem,
   MessageListData,
 } from '../selectors/chat-selectors';
 import type { MessageInfo, RawMessageInfo } from '../types/message-types';
 import { isComposableMessageType } from '../types/message-types.js';
+import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import { userRelationshipStatus } from '../types/relationship-types.js';
 import { threadPermissions } from '../types/thread-permission-types.js';
 import { type ThreadType, threadTypes } from '../types/thread-types-enum.js';
 import { type ThreadInfo } from '../types/thread-types.js';
 import type {
   AccountUserInfo,
   UserListItem,
   GlobalAccountUserInfo,
 } from '../types/user-types.js';
 import {
   useServerCall,
   useDispatchActionPromise,
 } from '../utils/action-utils.js';
 import { values } from '../utils/objects.js';
 
 const notFriendNotice = 'not friend';
 
 function getPotentialMemberItems({
   text,
   userInfos,
   searchIndex,
   excludeUserIDs,
   includeServerSearchUsers,
   inputParentThreadInfo,
   inputCommunityThreadInfo,
   threadType,
 }: {
   +text: string,
   +userInfos: { +[id: string]: AccountUserInfo },
   +searchIndex: SearchIndex,
   +excludeUserIDs: $ReadOnlyArray<string>,
   +includeServerSearchUsers?: $ReadOnlyArray<GlobalAccountUserInfo>,
-  +inputParentThreadInfo?: ?ThreadInfo,
-  +inputCommunityThreadInfo?: ?ThreadInfo,
+  +inputParentThreadInfo?: ?ThreadInfo | ?MinimallyEncodedThreadInfo,
+  +inputCommunityThreadInfo?: ?ThreadInfo | ?MinimallyEncodedThreadInfo,
   +threadType?: ?ThreadType,
 }): UserListItem[] {
   const communityThreadInfo =
     inputCommunityThreadInfo && inputCommunityThreadInfo.id !== genesis.id
       ? inputCommunityThreadInfo
       : null;
   const parentThreadInfo =
     inputParentThreadInfo && inputParentThreadInfo.id !== genesis.id
       ? inputParentThreadInfo
       : null;
 
   const containgThreadID = threadType
     ? getContainingThreadID(parentThreadInfo, threadType)
     : null;
 
   let containingThreadInfo = null;
   if (containgThreadID === parentThreadInfo?.id) {
     containingThreadInfo = parentThreadInfo;
   } else if (containgThreadID === communityThreadInfo?.id) {
     containingThreadInfo = communityThreadInfo;
   }
 
   const results: {
     [id: string]: {
       ...AccountUserInfo | GlobalAccountUserInfo,
       isMemberOfParentThread: boolean,
       isMemberOfContainingThread: boolean,
     },
   } = {};
   const appendUserInfo = (
     userInfo: AccountUserInfo | GlobalAccountUserInfo,
   ) => {
     const { id } = userInfo;
     if (excludeUserIDs.includes(id) || id in results) {
       return;
     }
     if (
       communityThreadInfo &&
       !threadMemberHasPermission(
         communityThreadInfo,
         id,
         threadPermissions.KNOW_OF,
       )
     ) {
       return;
     }
     results[id] = {
       ...userInfo,
       isMemberOfParentThread: userIsMember(parentThreadInfo, id),
       isMemberOfContainingThread: userIsMember(containingThreadInfo, id),
     };
   };
   if (text === '') {
     for (const id in userInfos) {
       appendUserInfo(userInfos[id]);
     }
   } else {
     const ids = searchIndex.getSearchResults(text);
     for (const id of ids) {
       appendUserInfo(userInfos[id]);
     }
   }
 
   if (includeServerSearchUsers) {
     for (const userInfo of includeServerSearchUsers) {
       appendUserInfo(userInfo);
     }
   }
 
   const blockedRelationshipsStatuses = new Set([
     userRelationshipStatus.BLOCKED_BY_VIEWER,
     userRelationshipStatus.BLOCKED_VIEWER,
     userRelationshipStatus.BOTH_BLOCKED,
   ]);
 
   let userResults = values(results);
   if (text === '') {
     userResults = userResults.filter(userInfo =>
       containingThreadInfo
         ? userInfo.isMemberOfContainingThread &&
           !blockedRelationshipsStatuses.has(userInfo.relationshipStatus)
         : userInfo?.relationshipStatus === userRelationshipStatus.FRIEND,
     );
   }
 
   const nonFriends = [];
   const blockedUsers = [];
   const friends = [];
   const containingThreadMembers = [];
   const parentThreadMembers = [];
 
   for (const userResult of userResults) {
     const relationshipStatus = userResult.relationshipStatus;
     if (blockedRelationshipsStatuses.has(relationshipStatus)) {
       blockedUsers.push(userResult);
     } else if (userResult.isMemberOfParentThread) {
       parentThreadMembers.push(userResult);
     } else if (userResult.isMemberOfContainingThread) {
       containingThreadMembers.push(userResult);
     } else if (relationshipStatus === userRelationshipStatus.FRIEND) {
       friends.push(userResult);
     } else {
       nonFriends.push(userResult);
     }
   }
 
   const sortedResults = parentThreadMembers
     .concat(containingThreadMembers)
     .concat(friends)
     .concat(nonFriends)
     .concat(blockedUsers);
 
   return sortedResults.map(
     ({
       isMemberOfContainingThread,
       isMemberOfParentThread,
       relationshipStatus,
       ...result
     }) => {
       let notice, alert;
       const username = result.username;
       if (blockedRelationshipsStatuses.has(relationshipStatus)) {
         notice = 'user is blocked';
         alert = {
           title: 'User is blocked',
           text:
             `Before you add ${username} to this chat, ` +
             'you’ll need to unblock them. You can do this from the Block List ' +
             'in the Profile tab.',
         };
       } else if (!isMemberOfContainingThread && containingThreadInfo) {
         if (threadType !== threadTypes.SIDEBAR) {
           notice = 'not in community';
           alert = {
             title: 'Not in community',
             text: 'You can only add members of the community to this chat',
           };
         } else {
           notice = 'not in parent chat';
           alert = {
             title: 'Not in parent chat',
             text: 'You can only add members of the parent chat to a thread',
           };
         }
       } else if (
         !containingThreadInfo &&
         relationshipStatus !== userRelationshipStatus.FRIEND
       ) {
         notice = notFriendNotice;
         alert = {
           title: 'Not a friend',
           text:
             `Before you add ${username} to this chat, ` +
             'you’ll need to send them a friend request. ' +
             'You can do this from the Friend List in the Profile tab.',
         };
       } else if (parentThreadInfo && !isMemberOfParentThread) {
         notice = 'not in parent chat';
       }
       if (notice) {
         result = { ...result, notice };
       }
       if (alert) {
         result = { ...result, alert };
       }
       return result;
     },
   );
 }
 
 function useSearchMessages(): (
   query: string,
   threadID: string,
   onResultsReceived: (
     messages: $ReadOnlyArray<RawMessageInfo>,
     endReached: boolean,
     queryID: number,
     threadID: string,
   ) => mixed,
   queryID: number,
   cursor?: string,
 ) => void {
   const callSearchMessages = useSearchMessagesAction();
   const dispatchActionPromise = useDispatchActionPromise();
 
   return React.useCallback(
     (query, threadID, onResultsReceived, queryID, cursor) => {
       const searchMessagesPromise = (async () => {
         if (query === '') {
           onResultsReceived([], true, queryID, threadID);
           return;
         }
         const { messages, endReached } = await callSearchMessages({
           query,
           threadID,
           cursor,
         });
         onResultsReceived(messages, endReached, queryID, threadID);
       })();
 
       dispatchActionPromise(searchMessagesActionTypes, searchMessagesPromise);
     },
     [callSearchMessages, dispatchActionPromise],
   );
 }
 
 function useSearchUsers(
   usernameInputText: string,
 ): $ReadOnlyArray<GlobalAccountUserInfo> {
   const currentUserID = useSelector(
     state => state.currentUserInfo && state.currentUserInfo.id,
   );
 
   const [serverSearchResults, setServerSearchResults] = React.useState<
     $ReadOnlyArray<GlobalAccountUserInfo>,
   >([]);
   const callSearchUsers = useServerCall(searchUsers);
   const dispatchActionPromise = useDispatchActionPromise();
   React.useEffect(() => {
     const searchUsersPromise = (async () => {
       if (usernameInputText.length === 0) {
         setServerSearchResults([]);
       } else {
         try {
           const { userInfos } = await callSearchUsers(usernameInputText);
           setServerSearchResults(
             userInfos.filter(({ id }) => id !== currentUserID),
           );
         } catch (err) {
           setServerSearchResults([]);
         }
       }
     })();
     dispatchActionPromise(searchUsersActionTypes, searchUsersPromise);
   }, [
     callSearchUsers,
     currentUserID,
     dispatchActionPromise,
     usernameInputText,
   ]);
 
   return serverSearchResults;
 }
 
 function filterChatMessageInfosForSearch(
   chatMessageInfos: MessageListData,
   translatedSearchResults: $ReadOnlyArray<MessageInfo>,
 ): ?(ChatMessageInfoItem[]) {
   if (!chatMessageInfos) {
     return null;
   }
 
   const idSet = new Set(translatedSearchResults.map(item => item.id));
 
   const chatMessageInfoItems = chatMessageInfos.filter(
     item =>
       item.messageInfo &&
       idSet.has(item.messageInfo.id) &&
       isComposableMessageType(item.messageInfo.type),
   );
 
   const uniqueChatMessageInfoItemsMap = new Map();
   chatMessageInfoItems.forEach(
     item =>
       item.messageInfo &&
       item.messageInfo.id &&
       uniqueChatMessageInfoItemsMap.set(item.messageInfo.id, item),
   );
 
   const sortedChatMessageInfoItems = [];
   for (let i = 0; i < translatedSearchResults.length; i++) {
     sortedChatMessageInfoItems.push(
       uniqueChatMessageInfoItemsMap.get(translatedSearchResults[i].id),
     );
   }
 
   return sortedChatMessageInfoItems.filter(Boolean);
 }
 
 export {
   getPotentialMemberItems,
   notFriendNotice,
   useSearchMessages,
   useSearchUsers,
   filterChatMessageInfosForSearch,
 };
diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
index 3ec2af2f4..7b3f70e79 100644
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -1,1981 +1,1981 @@
 // @flow
 
 import invariant from 'invariant';
 import _find from 'lodash/fp/find.js';
 import _mapValues from 'lodash/fp/mapValues.js';
 import _omitBy from 'lodash/fp/omitBy.js';
 import * as React from 'react';
 
 import { generatePendingThreadColor } from './color-utils.js';
 import { type ParserRules } from './markdown.js';
 import { extractUserMentionsFromText } from './mention-utils.js';
 import { getMessageTitle, isInvalidSidebarSource } from './message-utils.js';
 import { relationshipBlockedInEitherDirection } from './relationship-utils.js';
 import threadWatcher from './thread-watcher.js';
 import {
   fetchMostRecentMessagesActionTypes,
   useFetchMostRecentMessages,
 } from '../actions/message-actions.js';
 import type { RemoveUsersFromThreadInput } from '../actions/thread-actions';
 import {
   changeThreadMemberRolesActionTypes,
   newThreadActionTypes,
   removeUsersFromThreadActionTypes,
 } from '../actions/thread-actions.js';
 import { searchUsers as searchUserCall } from '../actions/user-actions.js';
 import ashoat from '../facts/ashoat.js';
 import genesis from '../facts/genesis.js';
 import { useLoggedInUserInfo } from '../hooks/account-hooks.js';
 import {
   hasPermission,
   permissionsToBitmaskHex,
   threadPermissionsFromBitmaskHex,
 } from '../permissions/minimally-encoded-thread-permissions.js';
 import {
   permissionLookup,
   getAllThreadPermissions,
   makePermissionsBlob,
 } from '../permissions/thread-permissions.js';
 import type {
   ChatThreadItem,
   ChatMessageInfoItem,
 } from '../selectors/chat-selectors.js';
 import { useGlobalThreadSearchIndex } from '../selectors/nav-selectors.js';
 import {
   threadInfoSelector,
   pendingToRealizedThreadIDsSelector,
   threadInfosSelectorForThreadType,
 } from '../selectors/thread-selectors.js';
 import {
   getRelativeMemberInfos,
   usersWithPersonalThreadSelector,
 } from '../selectors/user-selectors.js';
 import { getUserAvatarForThread } from '../shared/avatar-utils.js';
 import type { CalendarQuery } from '../types/entry-types.js';
 import { messageTypes } from '../types/message-types-enum.js';
 import {
   type RobotextMessageInfo,
   type ComposableMessageInfo,
 } from '../types/message-types.js';
 import type {
   MinimallyEncodedMemberInfo,
   MinimallyEncodedRawThreadInfo,
   MinimallyEncodedRelativeMemberInfo,
   MinimallyEncodedRoleInfo,
   MinimallyEncodedThreadCurrentUserInfo,
   MinimallyEncodedThreadInfo,
 } from '../types/minimally-encoded-thread-permissions-types.js';
 import { decodeMinimallyEncodedRoleInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import { userRelationshipStatus } from '../types/relationship-types.js';
 import {
   threadPermissionPropagationPrefixes,
   threadPermissions,
   configurableCommunityPermissions,
   type ThreadPermission,
   type ThreadPermissionsInfo,
   type UserSurfacedPermission,
 } from '../types/thread-permission-types.js';
 import {
   type ThreadType,
   threadTypes,
   threadTypeIsCommunityRoot,
   assertThreadType,
 } from '../types/thread-types-enum.js';
 import {
   type RawThreadInfo,
   type ThreadInfo,
   type MemberInfo,
   type ServerThreadInfo,
   type RelativeMemberInfo,
   type ThreadCurrentUserInfo,
   type RoleInfo,
   type ServerMemberInfo,
   type ClientNewThreadRequest,
   type NewThreadResult,
   type ChangeThreadSettingsPayload,
   type UserProfileThreadInfo,
 } from '../types/thread-types.js';
 import { updateTypes } from '../types/update-types-enum.js';
 import { type ClientUpdateInfo } from '../types/update-types.js';
 import type {
   GlobalAccountUserInfo,
   UserInfos,
   AccountUserInfo,
   LoggedInUserInfo,
   UserInfo,
 } from '../types/user-types.js';
 import {
   useDispatchActionPromise,
   useServerCall,
 } from '../utils/action-utils.js';
 import type { DispatchActionPromise } from '../utils/action-utils.js';
 import type { GetENSNames } from '../utils/ens-helpers.js';
 import {
   ET,
   entityTextToRawString,
   getEntityTextAsString,
   type ThreadEntity,
   type UserEntity,
 } from '../utils/entity-text.js';
 import { useSelector } from '../utils/redux-utils.js';
 import { firstLine } from '../utils/string-utils.js';
 import { trimText } from '../utils/text-utils.js';
 import { pendingThreadIDRegex } from '../utils/validation-utils.js';
 
 function threadHasPermission(
   threadInfo: ?(
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
   permission: ThreadPermission,
 ): boolean {
   if (!threadInfo) {
     return false;
   }
   invariant(
     !permissionsDisabledByBlock.has(permission) || threadInfo?.uiName,
     `${permission} can be disabled by a block, but threadHasPermission can't ` +
       'check for a block on RawThreadInfo. Please pass in ThreadInfo instead!',
   );
   if (threadInfo.minimallyEncoded) {
     return hasPermission(threadInfo.currentUser.permissions, permission);
   }
   return permissionLookup(threadInfo.currentUser.permissions, permission);
 }
 
 function viewerIsMember(
   threadInfo: ?(
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
 ): boolean {
   return !!(
     threadInfo &&
     threadInfo.currentUser.role !== null &&
     threadInfo.currentUser.role !== undefined
   );
 }
 
 function threadIsInHome(
   threadInfo: ?(
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
 ): boolean {
   return !!(threadInfo && threadInfo.currentUser.subscription.home);
 }
 
 // Can have messages
 function threadInChatList(
   threadInfo: ?(
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
 ): boolean {
   return (
     viewerIsMember(threadInfo) &&
     threadHasPermission(threadInfo, threadPermissions.VISIBLE)
   );
 }
 
 function threadIsTopLevel(
   threadInfo: ?(
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
 ): boolean {
   return threadInChatList(threadInfo) && threadIsChannel(threadInfo);
 }
 
 function threadIsChannel(
   threadInfo: ?(
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
 ): boolean {
   return !!(threadInfo && threadInfo.type !== threadTypes.SIDEBAR);
 }
 
 function threadIsSidebar(
   threadInfo: ?(
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
 ): boolean {
   return threadInfo?.type === threadTypes.SIDEBAR;
 }
 
 function threadInBackgroundChatList(
   threadInfo: ?(
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
 ): boolean {
   return threadInChatList(threadInfo) && !threadIsInHome(threadInfo);
 }
 
 function threadInHomeChatList(
   threadInfo: ?(
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
 ): boolean {
   return threadInChatList(threadInfo) && threadIsInHome(threadInfo);
 }
 
 // Can have Calendar entries,
 // does appear as a top-level entity in the thread list
 function threadInFilterList(
   threadInfo: ?(
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
 ): boolean {
   return (
     threadInChatList(threadInfo) &&
     !!threadInfo &&
     threadInfo.type !== threadTypes.SIDEBAR
   );
 }
 
 function userIsMember(
   threadInfo: ?(
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
   userID: string,
 ): boolean {
   if (!threadInfo) {
     return false;
   }
   if (threadInfo.id === genesis.id) {
     return true;
   }
   return threadInfo.members.some(member => member.id === userID && member.role);
 }
 
 function threadActualMembers(
   memberInfos: $ReadOnlyArray<
     | MemberInfo
     | RelativeMemberInfo
     | MinimallyEncodedMemberInfo
     | MinimallyEncodedRelativeMemberInfo,
   >,
 ): $ReadOnlyArray<string> {
   return memberInfos
     .filter(memberInfo => memberInfo.role)
     .map(memberInfo => memberInfo.id);
 }
 
 function threadOtherMembers<
   T:
     | MemberInfo
     | RelativeMemberInfo
     | MinimallyEncodedMemberInfo
     | MinimallyEncodedRelativeMemberInfo,
 >(memberInfos: $ReadOnlyArray<T>, viewerID: ?string): $ReadOnlyArray<T> {
   return memberInfos.filter(
     memberInfo => memberInfo.role && memberInfo.id !== viewerID,
   );
 }
 
 function threadMembersWithoutAddedAshoat<
   T:
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
 >(threadInfo: T): $PropertyType<T, 'members'> {
   if (threadInfo.community !== genesis.id) {
     return threadInfo.members;
   }
   return threadInfo.members.filter(
     member => member.id !== ashoat.id || member.role,
   );
 }
 
 function threadIsGroupChat(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 ): boolean {
   return threadInfo.members.length > 2;
 }
 
 function threadOrParentThreadIsGroupChat(
   threadInfo:
     | RawThreadInfo
     | ThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
 ) {
   return threadMembersWithoutAddedAshoat(threadInfo).length > 2;
 }
 
 function threadIsPending(threadID: ?string): boolean {
   return !!threadID?.startsWith('pending');
 }
 
 function threadIsPendingSidebar(threadID: ?string): boolean {
   return !!threadID?.startsWith('pending/sidebar/');
 }
 
 function getSingleOtherUser(
   threadInfo:
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
   viewerID: ?string,
 ): ?string {
   if (!viewerID) {
     return undefined;
   }
   const otherMembers = threadOtherMembers(threadInfo.members, viewerID);
   if (otherMembers.length !== 1) {
     return undefined;
   }
   return otherMembers[0].id;
 }
 
 function getPendingThreadID(
   threadType: ThreadType,
   memberIDs: $ReadOnlyArray<string>,
   sourceMessageID: ?string,
 ): string {
   const pendingThreadKey = sourceMessageID
     ? `sidebar/${sourceMessageID}`
     : [...memberIDs].sort().join('+');
   const pendingThreadTypeString = sourceMessageID ? '' : `type${threadType}/`;
   return `pending/${pendingThreadTypeString}${pendingThreadKey}`;
 }
 
 type PendingThreadIDContents = {
   +threadType: ThreadType,
   +memberIDs: $ReadOnlyArray<string>,
   +sourceMessageID: ?string,
 };
 
 function parsePendingThreadID(
   pendingThreadID: string,
 ): ?PendingThreadIDContents {
   const pendingRegex = new RegExp(`^${pendingThreadIDRegex}$`);
   const pendingThreadIDMatches = pendingRegex.exec(pendingThreadID);
   if (!pendingThreadIDMatches) {
     return null;
   }
   const [threadTypeString, threadKey] = pendingThreadIDMatches[1].split('/');
   const threadType =
     threadTypeString === 'sidebar'
       ? threadTypes.SIDEBAR
       : assertThreadType(Number(threadTypeString.replace('type', '')));
   const memberIDs = threadTypeString === 'sidebar' ? [] : threadKey.split('+');
   const sourceMessageID = threadTypeString === 'sidebar' ? threadKey : null;
   return {
     threadType,
     memberIDs,
     sourceMessageID,
   };
 }
 
 type UserIDAndUsername = {
   +id: string,
   +username: string,
   ...
 };
 type CreatePendingThreadArgs = {
   +viewerID: string,
   +threadType: ThreadType,
   +members: $ReadOnlyArray<UserIDAndUsername>,
   +parentThreadInfo?: ?ThreadInfo,
   +threadColor?: ?string,
   +name?: ?string,
   +sourceMessageID?: string,
 };
 
 function createPendingThread({
   viewerID,
   threadType,
   members,
   parentThreadInfo,
   threadColor,
   name,
   sourceMessageID,
 }: CreatePendingThreadArgs): ThreadInfo {
   const now = Date.now();
   if (!members.some(member => member.id === viewerID)) {
     throw new Error(
       'createPendingThread should be called with the viewer as a member',
     );
   }
 
   const memberIDs = members.map(member => member.id);
   const threadID = getPendingThreadID(threadType, memberIDs, sourceMessageID);
 
   const permissions = {
     [threadPermissions.KNOW_OF]: true,
     [threadPermissions.VISIBLE]: true,
     [threadPermissions.VOICED]: true,
   };
 
   const membershipPermissions = getAllThreadPermissions(
     makePermissionsBlob(permissions, null, threadID, threadType),
     threadID,
   );
   const role = {
     id: `${threadID}/role`,
     name: 'Members',
     permissions,
     isDefault: true,
   };
 
   const rawThreadInfo = {
     id: threadID,
     type: threadType,
     name: name ?? null,
     description: null,
     color: threadColor ?? generatePendingThreadColor(memberIDs),
     creationTime: now,
     parentThreadID: parentThreadInfo?.id ?? null,
     containingThreadID: getContainingThreadID(parentThreadInfo, threadType),
     community: getCommunity(parentThreadInfo),
     members: members.map(member => ({
       id: member.id,
       role: role.id,
       permissions: membershipPermissions,
       isSender: false,
     })),
     roles: {
       [role.id]: role,
     },
     currentUser: {
       role: role.id,
       permissions: membershipPermissions,
       subscription: {
         pushNotifs: false,
         home: false,
       },
       unread: false,
     },
     repliesCount: 0,
     sourceMessageID,
     pinnedCount: 0,
   };
 
   const userInfos = {};
   for (const member of members) {
     const { id, username } = member;
     userInfos[id] = { id, username };
   }
 
   return threadInfoFromRawThreadInfo(rawThreadInfo, viewerID, userInfos);
 }
 
 type PendingPersonalThread = {
   +threadInfo: ThreadInfo,
   +pendingPersonalThreadUserInfo: UserInfo,
 };
 
 function createPendingPersonalThread(
   loggedInUserInfo: LoggedInUserInfo,
   userID: string,
   username: string,
 ): PendingPersonalThread {
   const pendingPersonalThreadUserInfo = {
     id: userID,
     username: username,
   };
 
   const threadInfo = createPendingThread({
     viewerID: loggedInUserInfo.id,
     threadType: threadTypes.PERSONAL,
     members: [loggedInUserInfo, pendingPersonalThreadUserInfo],
   });
 
   return { threadInfo, pendingPersonalThreadUserInfo };
 }
 
 function createPendingThreadItem(
   loggedInUserInfo: LoggedInUserInfo,
   user: UserIDAndUsername,
 ): ChatThreadItem {
   const { threadInfo, pendingPersonalThreadUserInfo } =
     createPendingPersonalThread(loggedInUserInfo, user.id, user.username);
 
   return {
     type: 'chatThreadItem',
     threadInfo,
     mostRecentMessageInfo: null,
     mostRecentNonLocalMessage: null,
     lastUpdatedTime: threadInfo.creationTime,
     lastUpdatedTimeIncludingSidebars: threadInfo.creationTime,
     sidebars: [],
     pendingPersonalThreadUserInfo,
   };
 }
 
 // Returns map from lowercase username to AccountUserInfo
 function memberLowercaseUsernameMap(
   members: $ReadOnlyArray<
     RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
 ): Map<string, AccountUserInfo> {
   const memberMap = new Map();
   for (const member of members) {
     const { id, role, username } = member;
     if (!role || !username) {
       continue;
     }
     memberMap.set(username.toLowerCase(), { id, username });
   }
   return memberMap;
 }
 
 // Returns map from user ID to AccountUserInfo
 function extractMentionedMembers(
   text: string,
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 ): Map<string, AccountUserInfo> {
   const memberMap = memberLowercaseUsernameMap(threadInfo.members);
   const mentions = extractUserMentionsFromText(text);
 
   const mentionedMembers = new Map();
   for (const mention of mentions) {
     const userInfo = memberMap.get(mention.toLowerCase());
     if (userInfo) {
       mentionedMembers.set(userInfo.id, userInfo);
     }
   }
   return mentionedMembers;
 }
 
 // When a member of the parent is mentioned in a sidebar,
 // they will be automatically added to that sidebar
 function extractNewMentionedParentMembers(
   messageText: string,
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   parentThreadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 ): AccountUserInfo[] {
   const mentionedMembersOfParent = extractMentionedMembers(
     messageText,
     parentThreadInfo,
   );
   for (const member of threadInfo.members) {
     if (member.role) {
       mentionedMembersOfParent.delete(member.id);
     }
   }
   return [...mentionedMembersOfParent.values()];
 }
 
 type SharedCreatePendingSidebarInput = {
   +sourceMessageInfo: ComposableMessageInfo | RobotextMessageInfo,
   +parentThreadInfo: ThreadInfo,
   +loggedInUserInfo: LoggedInUserInfo,
 };
 
 type BaseCreatePendingSidebarInput = {
   ...SharedCreatePendingSidebarInput,
   +messageTitle: string,
 };
 function baseCreatePendingSidebar(
   input: BaseCreatePendingSidebarInput,
 ): ThreadInfo {
   const {
     sourceMessageInfo,
     parentThreadInfo,
     loggedInUserInfo,
     messageTitle,
   } = input;
   const { color, type: parentThreadType } = parentThreadInfo;
   const threadName = trimText(messageTitle, 30);
 
   const initialMembers = new Map();
 
   const { id: viewerID, username: viewerUsername } = loggedInUserInfo;
   initialMembers.set(viewerID, { id: viewerID, username: viewerUsername });
 
   if (userIsMember(parentThreadInfo, sourceMessageInfo.creator.id)) {
     const { id: sourceAuthorID, username: sourceAuthorUsername } =
       sourceMessageInfo.creator;
     invariant(
       sourceAuthorUsername,
       'sourceAuthorUsername should be set in createPendingSidebar',
     );
     const initialMemberUserInfo = {
       id: sourceAuthorID,
       username: sourceAuthorUsername,
     };
     initialMembers.set(sourceAuthorID, initialMemberUserInfo);
   }
 
   const singleOtherUser = getSingleOtherUser(parentThreadInfo, viewerID);
   if (parentThreadType === threadTypes.PERSONAL && singleOtherUser) {
     const singleOtherUsername = parentThreadInfo.members.find(
       member => member.id === singleOtherUser,
     )?.username;
     invariant(
       singleOtherUsername,
       'singleOtherUsername should be set in createPendingSidebar',
     );
     const singleOtherUserInfo = {
       id: singleOtherUser,
       username: singleOtherUsername,
     };
     initialMembers.set(singleOtherUser, singleOtherUserInfo);
   }
 
   if (sourceMessageInfo.type === messageTypes.TEXT) {
     const mentionedMembersOfParent = extractMentionedMembers(
       sourceMessageInfo.text,
       parentThreadInfo,
     );
     for (const [memberID, member] of mentionedMembersOfParent) {
       initialMembers.set(memberID, member);
     }
   }
 
   return createPendingThread({
     viewerID,
     threadType: threadTypes.SIDEBAR,
     members: [...initialMembers.values()],
     parentThreadInfo,
     threadColor: color,
     name: threadName,
     sourceMessageID: sourceMessageInfo.id,
   });
 }
 
 // The message title here may have ETH addresses that aren't resolved to ENS
 // names. This function should only be used in cases where we're sure that we
 // don't care about the thread title. We should prefer createPendingSidebar
 // wherever possible
 type CreateUnresolvedPendingSidebarInput = {
   ...SharedCreatePendingSidebarInput,
   +markdownRules: ParserRules,
 };
 function createUnresolvedPendingSidebar(
   input: CreateUnresolvedPendingSidebarInput,
 ): ThreadInfo {
   const {
     sourceMessageInfo,
     parentThreadInfo,
     loggedInUserInfo,
     markdownRules,
   } = input;
 
   const messageTitleEntityText = getMessageTitle(
     sourceMessageInfo,
     parentThreadInfo,
     parentThreadInfo,
     markdownRules,
   );
   const messageTitle = entityTextToRawString(messageTitleEntityText, {
     ignoreViewer: true,
   });
 
   return baseCreatePendingSidebar({
     sourceMessageInfo,
     parentThreadInfo,
     messageTitle,
     loggedInUserInfo,
   });
 }
 
 type CreatePendingSidebarInput = {
   ...SharedCreatePendingSidebarInput,
   +markdownRules: ParserRules,
   +getENSNames: ?GetENSNames,
 };
 async function createPendingSidebar(
   input: CreatePendingSidebarInput,
 ): Promise<ThreadInfo> {
   const {
     sourceMessageInfo,
     parentThreadInfo,
     loggedInUserInfo,
     markdownRules,
     getENSNames,
   } = input;
 
   const messageTitleEntityText = getMessageTitle(
     sourceMessageInfo,
     parentThreadInfo,
     parentThreadInfo,
     markdownRules,
   );
   const messageTitle = await getEntityTextAsString(
     messageTitleEntityText,
     getENSNames,
     { ignoreViewer: true },
   );
   invariant(
     messageTitle !== null && messageTitle !== undefined,
     'getEntityTextAsString only returns falsey when passed falsey',
   );
 
   return baseCreatePendingSidebar({
     sourceMessageInfo,
     parentThreadInfo,
     messageTitle,
     loggedInUserInfo,
   });
 }
 
 function pendingThreadType(numberOfOtherMembers: number): 4 | 6 | 7 {
   if (numberOfOtherMembers === 0) {
     return threadTypes.PRIVATE;
   } else if (numberOfOtherMembers === 1) {
     return threadTypes.PERSONAL;
   } else {
     return threadTypes.LOCAL;
   }
 }
 
 function threadTypeCanBePending(threadType: ThreadType): boolean {
   return (
     threadType === threadTypes.PERSONAL ||
     threadType === threadTypes.LOCAL ||
     threadType === threadTypes.SIDEBAR ||
     threadType === threadTypes.PRIVATE
   );
 }
 
 type CreateRealThreadParameters = {
-  +threadInfo: ThreadInfo,
+  +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   +dispatchActionPromise: DispatchActionPromise,
   +createNewThread: ClientNewThreadRequest => Promise<NewThreadResult>,
   +sourceMessageID: ?string,
   +viewerID: ?string,
   +handleError?: () => mixed,
   +calendarQuery: CalendarQuery,
 };
 async function createRealThreadFromPendingThread({
   threadInfo,
   dispatchActionPromise,
   createNewThread,
   sourceMessageID,
   viewerID,
   calendarQuery,
 }: CreateRealThreadParameters): Promise<string> {
   if (!threadIsPending(threadInfo.id)) {
     return threadInfo.id;
   }
 
   const otherMemberIDs = threadOtherMembers(threadInfo.members, viewerID).map(
     member => member.id,
   );
   let resultPromise;
   if (threadInfo.type !== threadTypes.SIDEBAR) {
     invariant(
       otherMemberIDs.length > 0,
       'otherMemberIDs should not be empty for threads',
     );
     resultPromise = createNewThread({
       type: pendingThreadType(otherMemberIDs.length),
       initialMemberIDs: otherMemberIDs,
       color: threadInfo.color,
       calendarQuery,
     });
   } else {
     invariant(
       sourceMessageID,
       'sourceMessageID should be set when creating a sidebar',
     );
     resultPromise = createNewThread({
       type: threadTypes.SIDEBAR,
       initialMemberIDs: otherMemberIDs,
       color: threadInfo.color,
       sourceMessageID,
       parentThreadID: threadInfo.parentThreadID,
       name: threadInfo.name,
       calendarQuery,
     });
   }
   dispatchActionPromise(newThreadActionTypes, resultPromise);
   const { newThreadID } = await resultPromise;
   return newThreadID;
 }
 
 type RawThreadInfoOptions = {
   +filterThreadEditAvatarPermission?: boolean,
   +excludePinInfo?: boolean,
   +filterManageInviteLinksPermission?: boolean,
 };
 function rawThreadInfoFromServerThreadInfo(
   serverThreadInfo: ServerThreadInfo,
   viewerID: string,
   options?: RawThreadInfoOptions,
 ): ?RawThreadInfo {
   const filterThreadEditAvatarPermission =
     options?.filterThreadEditAvatarPermission;
   const excludePinInfo = options?.excludePinInfo;
   const filterManageInviteLinksPermission =
     options?.filterManageInviteLinksPermission;
 
   const filterThreadPermissions = _omitBy(
     (v, k) =>
       (filterThreadEditAvatarPermission &&
         [
           threadPermissions.EDIT_THREAD_AVATAR,
           threadPermissionPropagationPrefixes.DESCENDANT +
             threadPermissions.EDIT_THREAD_AVATAR,
         ].includes(k)) ||
       (excludePinInfo &&
         [
           threadPermissions.MANAGE_PINS,
           threadPermissionPropagationPrefixes.DESCENDANT +
             threadPermissions.MANAGE_PINS,
         ].includes(k)) ||
       (filterManageInviteLinksPermission &&
         [threadPermissions.MANAGE_INVITE_LINKS].includes(k)),
   );
 
   const members = [];
   let currentUser;
   for (const serverMember of serverThreadInfo.members) {
     if (
       serverThreadInfo.id === genesis.id &&
       serverMember.id !== viewerID &&
       serverMember.id !== ashoat.id
     ) {
       continue;
     }
 
     const memberPermissions = filterThreadPermissions(serverMember.permissions);
 
     members.push({
       id: serverMember.id,
       role: serverMember.role,
       permissions: memberPermissions,
       isSender: serverMember.isSender,
     });
     if (serverMember.id === viewerID) {
       currentUser = {
         role: serverMember.role,
         permissions: memberPermissions,
         subscription: serverMember.subscription,
         unread: serverMember.unread,
       };
     }
   }
 
   let currentUserPermissions;
   if (currentUser) {
     currentUserPermissions = currentUser.permissions;
   } else {
     currentUserPermissions = filterThreadPermissions(
       getAllThreadPermissions(null, serverThreadInfo.id),
     );
     currentUser = {
       role: null,
       permissions: currentUserPermissions,
       subscription: {
         home: false,
         pushNotifs: false,
       },
       unread: null,
     };
   }
   if (!permissionLookup(currentUserPermissions, threadPermissions.KNOW_OF)) {
     return null;
   }
 
   const rolesWithFilteredThreadPermissions = _mapValues(role => ({
     ...role,
     permissions: filterThreadPermissions(role.permissions),
   }))(serverThreadInfo.roles);
 
   let rawThreadInfo: any = {
     id: serverThreadInfo.id,
     type: serverThreadInfo.type,
     name: serverThreadInfo.name,
     description: serverThreadInfo.description,
     color: serverThreadInfo.color,
     creationTime: serverThreadInfo.creationTime,
     parentThreadID: serverThreadInfo.parentThreadID,
     members,
     roles: rolesWithFilteredThreadPermissions,
     currentUser,
     repliesCount: serverThreadInfo.repliesCount,
     containingThreadID: serverThreadInfo.containingThreadID,
     community: serverThreadInfo.community,
   };
   const sourceMessageID = serverThreadInfo.sourceMessageID;
   if (sourceMessageID) {
     rawThreadInfo = { ...rawThreadInfo, sourceMessageID };
   }
   if (serverThreadInfo.avatar) {
     rawThreadInfo = { ...rawThreadInfo, avatar: serverThreadInfo.avatar };
   }
   if (!excludePinInfo) {
     return {
       ...rawThreadInfo,
       pinnedCount: serverThreadInfo.pinnedCount,
     };
   }
   return rawThreadInfo;
 }
 
 function threadUIName(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 ): string | ThreadEntity {
   if (threadInfo.name) {
     return firstLine(threadInfo.name);
   }
 
   let threadMembers:
     | $ReadOnlyArray<MinimallyEncodedRelativeMemberInfo>
     | $ReadOnlyArray<RelativeMemberInfo>;
   let memberEntities: $ReadOnlyArray<UserEntity>;
   // Branching below is to appease flow
   if (threadInfo.minimallyEncoded) {
     threadMembers = threadInfo.members.filter(memberInfo => memberInfo.role);
     memberEntities = threadMembers.map(member => ET.user({ userInfo: member }));
   } else {
     threadMembers = threadInfo.members.filter(memberInfo => memberInfo.role);
     memberEntities = threadMembers.map(member => ET.user({ userInfo: member }));
   }
 
   return {
     type: 'thread',
     id: threadInfo.id,
     name: threadInfo.name,
     display: 'uiName',
     uiName: memberEntities,
     ifJustViewer:
       threadInfo.type === threadTypes.PRIVATE
         ? 'viewer_username'
         : 'just_you_string',
   };
 }
 
 function threadInfoFromRawThreadInfo(
   rawThreadInfo: RawThreadInfo,
   viewerID: ?string,
   userInfos: UserInfos,
 ): ThreadInfo {
   let threadInfo: ThreadInfo = {
     id: rawThreadInfo.id,
     type: rawThreadInfo.type,
     name: rawThreadInfo.name,
     uiName: '',
     description: rawThreadInfo.description,
     color: rawThreadInfo.color,
     creationTime: rawThreadInfo.creationTime,
     parentThreadID: rawThreadInfo.parentThreadID,
     containingThreadID: rawThreadInfo.containingThreadID,
     community: rawThreadInfo.community,
     members: getRelativeMemberInfos(rawThreadInfo, viewerID, userInfos),
     roles: rawThreadInfo.roles,
     currentUser: getCurrentUser(rawThreadInfo, viewerID, userInfos),
     repliesCount: rawThreadInfo.repliesCount,
   };
   threadInfo = {
     ...threadInfo,
     uiName: threadUIName(threadInfo),
   };
   const { sourceMessageID, avatar, pinnedCount } = rawThreadInfo;
   if (sourceMessageID) {
     threadInfo = { ...threadInfo, sourceMessageID };
   }
 
   if (avatar) {
     threadInfo = { ...threadInfo, avatar };
   } else if (
     rawThreadInfo.type === threadTypes.PERSONAL ||
     rawThreadInfo.type === threadTypes.PRIVATE
   ) {
     threadInfo = {
       ...threadInfo,
       avatar: getUserAvatarForThread(rawThreadInfo, viewerID, userInfos),
     };
   }
 
   if (pinnedCount) {
     threadInfo = { ...threadInfo, pinnedCount };
   }
 
   return threadInfo;
 }
 
 function getCurrentUser(
   threadInfo: RawThreadInfo | ThreadInfo,
   viewerID: ?string,
   userInfos: UserInfos,
 ): ThreadCurrentUserInfo {
   if (!threadFrozenDueToBlock(threadInfo, viewerID, userInfos)) {
     return threadInfo.currentUser;
   }
 
   return {
     ...threadInfo.currentUser,
     permissions: {
       ...threadInfo.currentUser.permissions,
       ...disabledPermissions,
     },
   };
 }
 
 function getMinimallyEncodedCurrentUser(
   threadInfo: MinimallyEncodedRawThreadInfo | MinimallyEncodedThreadInfo,
   viewerID: ?string,
   userInfos: UserInfos,
 ): MinimallyEncodedThreadCurrentUserInfo {
   if (!threadFrozenDueToBlock(threadInfo, viewerID, userInfos)) {
     return threadInfo.currentUser;
   }
   const decodedPermissions = threadPermissionsFromBitmaskHex(
     threadInfo.currentUser.permissions,
   );
   const updatedPermissions = {
     ...decodedPermissions,
     ...disabledPermissions,
   };
   const encodedUpdatedPermissions = permissionsToBitmaskHex(updatedPermissions);
   return {
     ...threadInfo.currentUser,
     permissions: encodedUpdatedPermissions,
   };
 }
 
 function threadIsWithBlockedUserOnly(
   threadInfo:
     | RawThreadInfo
     | ThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
   viewerID: ?string,
   userInfos: UserInfos,
   checkOnlyViewerBlock?: boolean,
 ): boolean {
   if (
     threadOrParentThreadIsGroupChat(threadInfo) ||
     threadOrParentThreadHasAdminRole(threadInfo)
   ) {
     return false;
   }
 
   const otherUserID = getSingleOtherUser(threadInfo, viewerID);
   if (!otherUserID) {
     return false;
   }
   const otherUserRelationshipStatus =
     userInfos[otherUserID]?.relationshipStatus;
 
   if (checkOnlyViewerBlock) {
     return (
       otherUserRelationshipStatus === userRelationshipStatus.BLOCKED_BY_VIEWER
     );
   }
 
   return (
     !!otherUserRelationshipStatus &&
     relationshipBlockedInEitherDirection(otherUserRelationshipStatus)
   );
 }
 
 function threadFrozenDueToBlock(
   threadInfo:
     | RawThreadInfo
     | ThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
   viewerID: ?string,
   userInfos: UserInfos,
 ): boolean {
   return threadIsWithBlockedUserOnly(threadInfo, viewerID, userInfos);
 }
 
 function threadFrozenDueToViewerBlock(
   threadInfo:
     | RawThreadInfo
     | ThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
   viewerID: ?string,
   userInfos: UserInfos,
 ): boolean {
   return threadIsWithBlockedUserOnly(threadInfo, viewerID, userInfos, true);
 }
 
 const threadTypeDescriptions: { [ThreadType]: string } = {
   [threadTypes.COMMUNITY_OPEN_SUBTHREAD]:
     'Anybody in the parent channel can see an open subchannel.',
   [threadTypes.COMMUNITY_SECRET_SUBTHREAD]:
     'Only visible to its members and admins of ancestor channels.',
 };
 
 function memberIsAdmin(
   memberInfo:
     | RelativeMemberInfo
     | MemberInfo
     | MinimallyEncodedMemberInfo
     | MinimallyEncodedRelativeMemberInfo,
   threadInfo:
     | ThreadInfo
     | RawThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
 ): boolean {
   return !!(
     memberInfo.role && roleIsAdminRole(threadInfo.roles[memberInfo.role])
   );
 }
 
 // Since we don't have access to all of the ancestor ThreadInfos, we approximate
 // "parent admin" as anybody with CHANGE_ROLE permissions.
 function memberHasAdminPowers(
   memberInfo:
     | RelativeMemberInfo
     | MemberInfo
     | ServerMemberInfo
     | MinimallyEncodedMemberInfo
     | MinimallyEncodedRelativeMemberInfo,
 ): boolean {
   if (memberInfo.minimallyEncoded) {
     return hasPermission(memberInfo.permissions, threadPermissions.CHANGE_ROLE);
   }
   return !!memberInfo.permissions[threadPermissions.CHANGE_ROLE]?.value;
 }
 
 function roleIsAdminRole(
   roleInfo: ?RoleInfo | ?MinimallyEncodedRoleInfo,
 ): boolean {
   return !!(roleInfo && !roleInfo.isDefault && roleInfo.name === 'Admins');
 }
 
 function threadHasAdminRole(
   threadInfo: ?(
     | RawThreadInfo
     | ThreadInfo
     | ServerThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo
   ),
 ): boolean {
   if (!threadInfo) {
     return false;
   }
   return !!_find({ name: 'Admins' })(threadInfo.roles);
 }
 
 function threadOrParentThreadHasAdminRole(
   threadInfo:
     | RawThreadInfo
     | ThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
 ) {
   return (
     threadMembersWithoutAddedAshoat(threadInfo).filter(member =>
       memberHasAdminPowers(member),
     ).length > 0
   );
 }
 
 function identifyInvalidatedThreads(
   updateInfos: $ReadOnlyArray<ClientUpdateInfo>,
 ): Set<string> {
   const invalidated = new Set();
   for (const updateInfo of updateInfos) {
     if (updateInfo.type === updateTypes.DELETE_THREAD) {
       invalidated.add(updateInfo.threadID);
     }
   }
   return invalidated;
 }
 
 const permissionsDisabledByBlockArray = [
   threadPermissions.VOICED,
   threadPermissions.EDIT_ENTRIES,
   threadPermissions.EDIT_THREAD_NAME,
   threadPermissions.EDIT_THREAD_COLOR,
   threadPermissions.EDIT_THREAD_DESCRIPTION,
   threadPermissions.CREATE_SUBCHANNELS,
   threadPermissions.CREATE_SIDEBARS,
   threadPermissions.JOIN_THREAD,
   threadPermissions.EDIT_PERMISSIONS,
   threadPermissions.ADD_MEMBERS,
   threadPermissions.REMOVE_MEMBERS,
 ];
 
 const permissionsDisabledByBlock: Set<ThreadPermission> = new Set(
   permissionsDisabledByBlockArray,
 );
 
 const disabledPermissions: ThreadPermissionsInfo =
   permissionsDisabledByBlockArray.reduce(
     (permissions: ThreadPermissionsInfo, permission: string) => ({
       ...permissions,
       [permission]: { value: false, source: null },
     }),
     {},
   );
 
 // Consider updating itemHeight in native/chat/chat-thread-list.react.js
 // if you change this
 const emptyItemText: string =
   `Background chats are just like normal chats, except they don't ` +
   `contribute to your unread count.\n\n` +
   `To move a chat over here, switch the “Background” option in its settings.`;
 
 function threadNoun(threadType: ThreadType, parentThreadID: ?string): string {
   if (threadType === threadTypes.SIDEBAR) {
     return 'thread';
   } else if (
     threadType === threadTypes.COMMUNITY_SECRET_SUBTHREAD &&
     parentThreadID === genesis.id
   ) {
     return 'chat';
   } else if (
     threadType === threadTypes.COMMUNITY_ROOT ||
     threadType === threadTypes.COMMUNITY_ANNOUNCEMENT_ROOT ||
     threadType === threadTypes.COMMUNITY_OPEN_SUBTHREAD ||
     threadType === threadTypes.COMMUNITY_OPEN_ANNOUNCEMENT_SUBTHREAD ||
     threadType === threadTypes.COMMUNITY_SECRET_SUBTHREAD ||
     threadType === threadTypes.COMMUNITY_SECRET_ANNOUNCEMENT_SUBTHREAD ||
     threadType === threadTypes.GENESIS
   ) {
     return 'channel';
   } else {
     return 'chat';
   }
 }
 
 function threadLabel(threadType: ThreadType): string {
   if (
     threadType === threadTypes.COMMUNITY_OPEN_SUBTHREAD ||
     threadType === threadTypes.COMMUNITY_OPEN_ANNOUNCEMENT_SUBTHREAD
   ) {
     return 'Open';
   } else if (threadType === threadTypes.PERSONAL) {
     return 'Personal';
   } else if (threadType === threadTypes.SIDEBAR) {
     return 'Thread';
   } else if (threadType === threadTypes.PRIVATE) {
     return 'Private';
   } else if (
     threadType === threadTypes.COMMUNITY_ROOT ||
     threadType === threadTypes.COMMUNITY_ANNOUNCEMENT_ROOT ||
     threadType === threadTypes.GENESIS
   ) {
     return 'Community';
   } else {
     return 'Secret';
   }
 }
 
-function useWatchThread(threadInfo: ?ThreadInfo) {
+function useWatchThread(threadInfo: ?ThreadInfo | ?MinimallyEncodedThreadInfo) {
   const dispatchActionPromise = useDispatchActionPromise();
   const callFetchMostRecentMessages = useFetchMostRecentMessages();
 
   const threadID = threadInfo?.id;
   const threadNotInChatList = !threadInChatList(threadInfo);
   React.useEffect(() => {
     if (threadID && threadNotInChatList) {
       threadWatcher.watchID(threadID);
       dispatchActionPromise(
         fetchMostRecentMessagesActionTypes,
         callFetchMostRecentMessages({ threadID }),
       );
     }
     return () => {
       if (threadID && threadNotInChatList) {
         threadWatcher.removeID(threadID);
       }
     };
   }, [
     callFetchMostRecentMessages,
     dispatchActionPromise,
     threadNotInChatList,
     threadID,
   ]);
 }
 
 type ExistingThreadInfoFinderParams = {
   +searching: boolean,
   +userInfoInputArray: $ReadOnlyArray<AccountUserInfo>,
 };
 type ExistingThreadInfoFinder = (
   params: ExistingThreadInfoFinderParams,
 ) => ?ThreadInfo;
 function useExistingThreadInfoFinder(
   baseThreadInfo: ?ThreadInfo,
 ): ExistingThreadInfoFinder {
   const threadInfos = useSelector(threadInfoSelector);
   const loggedInUserInfo = useLoggedInUserInfo();
   const userInfos = useSelector(state => state.userStore.userInfos);
 
   const pendingToRealizedThreadIDs = useSelector(state =>
     pendingToRealizedThreadIDsSelector(state.threadStore.threadInfos),
   );
   return React.useCallback(
     (params: ExistingThreadInfoFinderParams): ?ThreadInfo => {
       if (!baseThreadInfo) {
         return null;
       }
 
       const realizedThreadInfo = threadInfos[baseThreadInfo.id];
       if (realizedThreadInfo) {
         return realizedThreadInfo;
       }
 
       if (!loggedInUserInfo || !threadIsPending(baseThreadInfo.id)) {
         return baseThreadInfo;
       }
       const viewerID = loggedInUserInfo?.id;
 
       invariant(
         threadTypeCanBePending(baseThreadInfo.type),
         `ThreadInfo has pending ID ${baseThreadInfo.id}, but type that ` +
           `should not be pending ${baseThreadInfo.type}`,
       );
 
       const { searching, userInfoInputArray } = params;
 
       const { sourceMessageID } = baseThreadInfo;
       const pendingThreadID = searching
         ? getPendingThreadID(
             pendingThreadType(userInfoInputArray.length),
             [...userInfoInputArray.map(user => user.id), viewerID],
             sourceMessageID,
           )
         : getPendingThreadID(
             baseThreadInfo.type,
             baseThreadInfo.members.map(member => member.id),
             sourceMessageID,
           );
 
       const realizedThreadID = pendingToRealizedThreadIDs.get(pendingThreadID);
       if (realizedThreadID && threadInfos[realizedThreadID]) {
         return threadInfos[realizedThreadID];
       }
 
       const updatedThread = searching
         ? createPendingThread({
             viewerID,
             threadType: pendingThreadType(userInfoInputArray.length),
             members: [loggedInUserInfo, ...userInfoInputArray],
           })
         : baseThreadInfo;
       return {
         ...updatedThread,
         currentUser: getCurrentUser(updatedThread, viewerID, userInfos),
       };
     },
     [
       baseThreadInfo,
       threadInfos,
       loggedInUserInfo,
       pendingToRealizedThreadIDs,
       userInfos,
     ],
   );
 }
 
 type ThreadTypeParentRequirement = 'optional' | 'required' | 'disabled';
 function getThreadTypeParentRequirement(
   threadType: ThreadType,
 ): ThreadTypeParentRequirement {
   if (
     threadType === threadTypes.COMMUNITY_OPEN_SUBTHREAD ||
     threadType === threadTypes.COMMUNITY_OPEN_ANNOUNCEMENT_SUBTHREAD ||
     //threadType === threadTypes.COMMUNITY_SECRET_SUBTHREAD ||
     threadType === threadTypes.COMMUNITY_SECRET_ANNOUNCEMENT_SUBTHREAD ||
     threadType === threadTypes.SIDEBAR
   ) {
     return 'required';
   } else if (
     threadType === threadTypes.COMMUNITY_ROOT ||
     threadType === threadTypes.COMMUNITY_ANNOUNCEMENT_ROOT ||
     threadType === threadTypes.GENESIS ||
     threadType === threadTypes.PERSONAL ||
     threadType === threadTypes.PRIVATE
   ) {
     return 'disabled';
   } else {
     return 'optional';
   }
 }
 
 function threadMemberHasPermission(
   threadInfo:
     | ServerThreadInfo
     | RawThreadInfo
     | ThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
   memberID: string,
   permission: ThreadPermission,
 ): boolean {
   for (const member of threadInfo.members) {
     if (member.id !== memberID) {
       continue;
     }
     if (member.minimallyEncoded) {
       return hasPermission(member.permissions, permission);
     }
     return permissionLookup(member.permissions, permission);
   }
   return false;
 }
 
 function useCanCreateSidebarFromMessage(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   messageInfo: ComposableMessageInfo | RobotextMessageInfo,
 ): boolean {
   const messageCreatorUserInfo = useSelector(
     state => state.userStore.userInfos[messageInfo.creator.id],
   );
 
   if (
     !messageInfo.id ||
     threadInfo.sourceMessageID === messageInfo.id ||
     isInvalidSidebarSource(messageInfo)
   ) {
     return false;
   }
 
   const messageCreatorRelationship = messageCreatorUserInfo?.relationshipStatus;
   const creatorRelationshipHasBlock =
     messageCreatorRelationship &&
     relationshipBlockedInEitherDirection(messageCreatorRelationship);
 
   const hasCreateSidebarsPermission = threadHasPermission(
     threadInfo,
     threadPermissions.CREATE_SIDEBARS,
   );
 
   return hasCreateSidebarsPermission && !creatorRelationshipHasBlock;
 }
 
 function useSidebarExistsOrCanBeCreated(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   messageItem: ChatMessageInfoItem,
 ): boolean {
   const canCreateSidebarFromMessage = useCanCreateSidebarFromMessage(
     threadInfo,
     messageItem.messageInfo,
   );
   return !!messageItem.threadCreatedFromMessage || canCreateSidebarFromMessage;
 }
 
 function checkIfDefaultMembersAreVoiced(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 ): boolean {
   const defaultRoleID = Object.keys(threadInfo.roles).find(
     roleID => threadInfo.roles[roleID].isDefault,
   );
   invariant(
     defaultRoleID !== undefined,
     'all threads should have a default role',
   );
   const defaultRole = threadInfo.roles[defaultRoleID];
   const defaultRolePermissions = defaultRole.minimallyEncoded
     ? decodeMinimallyEncodedRoleInfo(defaultRole).permissions
     : defaultRole.permissions;
 
   return !!defaultRolePermissions[threadPermissions.VOICED];
 }
 
 const draftKeySuffix = '/message_composer';
 
 function draftKeyFromThreadID(threadID: string): string {
   return `${threadID}${draftKeySuffix}`;
 }
 
 function getContainingThreadID(
   parentThreadInfo:
     | ?ServerThreadInfo
     | RawThreadInfo
     | ThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
   threadType: ThreadType,
 ): ?string {
   if (!parentThreadInfo) {
     return null;
   }
   if (threadType === threadTypes.SIDEBAR) {
     return parentThreadInfo.id;
   }
   if (!parentThreadInfo.containingThreadID) {
     return parentThreadInfo.id;
   }
   return parentThreadInfo.containingThreadID;
 }
 
 function getCommunity(
   parentThreadInfo:
     | ?ServerThreadInfo
     | RawThreadInfo
     | ThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
 ): ?string {
   if (!parentThreadInfo) {
     return null;
   }
   const { id, community, type } = parentThreadInfo;
   if (community !== null && community !== undefined) {
     return community;
   }
   if (threadTypeIsCommunityRoot(type)) {
     return id;
   }
   return null;
 }
 
 function getThreadListSearchResults(
   chatListData: $ReadOnlyArray<ChatThreadItem>,
   searchText: string,
   threadFilter: ThreadInfo => boolean,
   threadSearchResults: $ReadOnlySet<string>,
   usersSearchResults: $ReadOnlyArray<GlobalAccountUserInfo>,
   loggedInUserInfo: ?LoggedInUserInfo,
 ): $ReadOnlyArray<ChatThreadItem> {
   if (!searchText) {
     return chatListData.filter(
       item =>
         threadIsTopLevel(item.threadInfo) && threadFilter(item.threadInfo),
     );
   }
 
   const privateThreads = [];
   const personalThreads = [];
   const otherThreads = [];
   for (const item of chatListData) {
     if (!threadSearchResults.has(item.threadInfo.id)) {
       continue;
     }
     if (item.threadInfo.type === threadTypes.PRIVATE) {
       privateThreads.push({ ...item, sidebars: [] });
     } else if (item.threadInfo.type === threadTypes.PERSONAL) {
       personalThreads.push({ ...item, sidebars: [] });
     } else {
       otherThreads.push({ ...item, sidebars: [] });
     }
   }
 
   const chatItems = [...privateThreads, ...personalThreads, ...otherThreads];
   if (loggedInUserInfo) {
     chatItems.push(
       ...usersSearchResults.map(user =>
         createPendingThreadItem(loggedInUserInfo, user),
       ),
     );
   }
   return chatItems;
 }
 
 type ThreadListSearchResult = {
   +threadSearchResults: $ReadOnlySet<string>,
   +usersSearchResults: $ReadOnlyArray<GlobalAccountUserInfo>,
 };
 function useThreadListSearch(
   searchText: string,
   viewerID: ?string,
 ): ThreadListSearchResult {
   const callSearchUsers = useServerCall(searchUserCall);
   const usersWithPersonalThread = useSelector(usersWithPersonalThreadSelector);
   const searchUsers = React.useCallback(
     async (usernamePrefix: string) => {
       if (usernamePrefix.length === 0) {
         return [];
       }
 
       const { userInfos } = await callSearchUsers(usernamePrefix);
       return userInfos.filter(
         info => !usersWithPersonalThread.has(info.id) && info.id !== viewerID,
       );
     },
     [callSearchUsers, usersWithPersonalThread, viewerID],
   );
 
   const [threadSearchResults, setThreadSearchResults] = React.useState(
     new Set(),
   );
   const [usersSearchResults, setUsersSearchResults] = React.useState([]);
   const threadSearchIndex = useGlobalThreadSearchIndex();
   React.useEffect(() => {
     (async () => {
       const results = threadSearchIndex.getSearchResults(searchText);
       setThreadSearchResults(new Set(results));
       const usersResults = await searchUsers(searchText);
       setUsersSearchResults(usersResults);
     })();
   }, [searchText, threadSearchIndex, searchUsers]);
 
   return { threadSearchResults, usersSearchResults };
 }
 
 function removeMemberFromThread(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   memberInfo: RelativeMemberInfo,
   dispatchActionPromise: DispatchActionPromise,
   removeUserFromThreadServerCall: (
     input: RemoveUsersFromThreadInput,
   ) => Promise<ChangeThreadSettingsPayload>,
 ) {
   const customKeyName = `${removeUsersFromThreadActionTypes.started}:${memberInfo.id}`;
   dispatchActionPromise(
     removeUsersFromThreadActionTypes,
     removeUserFromThreadServerCall({
       threadID: threadInfo.id,
       memberIDs: [memberInfo.id],
     }),
     { customKeyName },
   );
 }
 
 function switchMemberAdminRoleInThread(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   memberInfo: RelativeMemberInfo,
   isCurrentlyAdmin: boolean,
   dispatchActionPromise: DispatchActionPromise,
   changeUserRoleServerCall: (
     threadID: string,
     memberIDs: $ReadOnlyArray<string>,
     newRole: string,
   ) => Promise<ChangeThreadSettingsPayload>,
 ) {
   let newRole = null;
   for (const roleID in threadInfo.roles) {
     const role = threadInfo.roles[roleID];
     if (isCurrentlyAdmin && role.isDefault) {
       newRole = role.id;
       break;
     } else if (!isCurrentlyAdmin && roleIsAdminRole(role)) {
       newRole = role.id;
       break;
     }
   }
   invariant(newRole !== null, 'Could not find new role');
 
   const customKeyName = `${changeThreadMemberRolesActionTypes.started}:${memberInfo.id}`;
   dispatchActionPromise(
     changeThreadMemberRolesActionTypes,
     changeUserRoleServerCall(threadInfo.id, [memberInfo.id], newRole),
     { customKeyName },
   );
 }
 
 function getAvailableThreadMemberActions(
   memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   canEdit: ?boolean = true,
 ): $ReadOnlyArray<'change_role' | 'remove_user'> {
   const role = memberInfo.role;
   if (!canEdit || !role) {
     return [];
   }
 
   const canRemoveMembers = threadHasPermission(
     threadInfo,
     threadPermissions.REMOVE_MEMBERS,
   );
   const canChangeRoles = threadHasPermission(
     threadInfo,
     threadPermissions.CHANGE_ROLE,
   );
 
   const result = [];
 
   if (canChangeRoles && memberInfo.username && threadHasAdminRole(threadInfo)) {
     result.push('change_role');
   }
 
   if (
     canRemoveMembers &&
     !memberInfo.isViewer &&
     (canChangeRoles || threadInfo.roles[role]?.isDefault)
   ) {
     result.push('remove_user');
   }
 
   return result;
 }
 
 function patchThreadInfoToIncludeMentionedMembersOfParent(
   threadInfo: ThreadInfo,
   parentThreadInfo: ThreadInfo,
   messageText: string,
   viewerID: string,
 ): ThreadInfo {
   const members: UserIDAndUsername[] = threadInfo.members
     .map(({ id, username }) => (username ? { id, username } : null))
     .filter(Boolean);
   const mentionedNewMembers = extractNewMentionedParentMembers(
     messageText,
     threadInfo,
     parentThreadInfo,
   );
   if (mentionedNewMembers.length === 0) {
     return threadInfo;
   }
   members.push(...mentionedNewMembers);
   return createPendingThread({
     viewerID,
     threadType: threadTypes.SIDEBAR,
     members,
     parentThreadInfo,
     threadColor: threadInfo.color,
     name: threadInfo.name,
     sourceMessageID: threadInfo.sourceMessageID,
   });
 }
 
 function threadInfoInsideCommunity(
   threadInfo:
     | RawThreadInfo
     | ThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
   communityID: string,
 ): boolean {
   return threadInfo.community === communityID || threadInfo.id === communityID;
 }
 
 type RoleAndMemberCount = {
   [roleName: string]: number,
 };
 
 function useRoleMemberCountsForCommunity(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 ): RoleAndMemberCount {
   return React.useMemo(() => {
     const roleIDsToNames = {};
 
     Object.keys(threadInfo.roles).forEach(roleID => {
       roleIDsToNames[roleID] = threadInfo.roles[roleID].name;
     });
 
     const roleNamesToMemberCount: RoleAndMemberCount = {};
 
     threadInfo.members.forEach(({ role: roleID }) => {
       invariant(roleID, 'Community member should have a role');
       const roleName = roleIDsToNames[roleID];
 
       roleNamesToMemberCount[roleName] =
         (roleNamesToMemberCount[roleName] ?? 0) + 1;
     });
 
     // For all community roles with no members, add them to the list with 0
     Object.keys(roleIDsToNames).forEach(roleName => {
       if (roleNamesToMemberCount[roleIDsToNames[roleName]] === undefined) {
         roleNamesToMemberCount[roleIDsToNames[roleName]] = 0;
       }
     });
 
     return roleNamesToMemberCount;
   }, [threadInfo]);
 }
 
 type RoleUserSurfacedPermissions = {
   +[roleName: string]: $ReadOnlySet<UserSurfacedPermission>,
 };
 // Iterates through the existing roles in the community and 'reverse maps'
 // the set of permission literals for each role to user-facing permission enums
 // to help pre-populate the permission checkboxes when editing roles.
 function useRoleUserSurfacedPermissions(
   threadInfo: ThreadInfo,
 ): RoleUserSurfacedPermissions {
   return React.useMemo(() => {
     const roleNamesToPermissions = {};
 
     Object.keys(threadInfo.roles).forEach(roleID => {
       const roleName = threadInfo.roles[roleID].name;
       const rolePermissions = Object.keys(threadInfo.roles[roleID].permissions);
       const setOfUserSurfacedPermissions = new Set();
 
       rolePermissions.forEach(rolePermission => {
         const userSurfacedPermission = Object.keys(
           configurableCommunityPermissions,
         ).find(key =>
           configurableCommunityPermissions[key].has(rolePermission),
         );
 
         if (userSurfacedPermission) {
           setOfUserSurfacedPermissions.add(userSurfacedPermission);
         }
       });
       roleNamesToPermissions[roleName] = setOfUserSurfacedPermissions;
     });
 
     return roleNamesToPermissions;
   }, [threadInfo]);
 }
 
 function communityOrThreadNoun(
   threadInfo:
     | RawThreadInfo
     | ThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
 ): string {
   return threadTypeIsCommunityRoot(threadInfo.type)
     ? 'community'
     : threadNoun(threadInfo.type, threadInfo.parentThreadID);
 }
 
 function getThreadsToDeleteText(
   threadInfo:
     | RawThreadInfo
     | ThreadInfo
     | MinimallyEncodedRawThreadInfo
     | MinimallyEncodedThreadInfo,
 ): string {
   return `${
     threadTypeIsCommunityRoot(threadInfo.type)
       ? 'Subchannels and threads'
       : 'Threads'
   } within this ${communityOrThreadNoun(threadInfo)}`;
 }
 
 function useUserProfileThreadInfo(userInfo: ?UserInfo): ?UserProfileThreadInfo {
   const userID = userInfo?.id;
   const username = userInfo?.username;
 
   const loggedInUserInfo = useLoggedInUserInfo();
   const isViewerProfile = loggedInUserInfo?.id === userID;
 
   const privateThreadInfosSelector = threadInfosSelectorForThreadType(
     threadTypes.PRIVATE,
   );
   const privateThreadInfos = useSelector(privateThreadInfosSelector);
 
   const personalThreadInfosSelector = threadInfosSelectorForThreadType(
     threadTypes.PERSONAL,
   );
 
   const personalThreadInfos = useSelector(personalThreadInfosSelector);
 
   const usersWithPersonalThread = useSelector(usersWithPersonalThreadSelector);
 
   return React.useMemo(() => {
     if (!loggedInUserInfo || !userID || !username) {
       return null;
     }
 
     if (isViewerProfile) {
       const privateThreadInfo: ?ThreadInfo = privateThreadInfos[0];
 
       return privateThreadInfo ? { threadInfo: privateThreadInfo } : null;
     }
 
     if (usersWithPersonalThread.has(userID)) {
       const personalThreadInfo: ?ThreadInfo = personalThreadInfos.find(
         threadInfo =>
           userID === getSingleOtherUser(threadInfo, loggedInUserInfo.id),
       );
 
       return personalThreadInfo ? { threadInfo: personalThreadInfo } : null;
     }
 
     const pendingPersonalThreadInfo = createPendingPersonalThread(
       loggedInUserInfo,
       userID,
       username,
     );
 
     return pendingPersonalThreadInfo;
   }, [
     isViewerProfile,
     loggedInUserInfo,
     personalThreadInfos,
     privateThreadInfos,
     userID,
     username,
     usersWithPersonalThread,
   ]);
 }
 
 export {
   threadHasPermission,
   viewerIsMember,
   threadInChatList,
   threadIsTopLevel,
   threadIsChannel,
   threadIsSidebar,
   threadInBackgroundChatList,
   threadInHomeChatList,
   threadIsInHome,
   threadInFilterList,
   userIsMember,
   threadActualMembers,
   threadOtherMembers,
   threadIsGroupChat,
   threadIsPending,
   threadIsPendingSidebar,
   getSingleOtherUser,
   getPendingThreadID,
   parsePendingThreadID,
   createPendingThread,
   createUnresolvedPendingSidebar,
   extractNewMentionedParentMembers,
   createPendingSidebar,
   pendingThreadType,
   createRealThreadFromPendingThread,
   getCurrentUser,
   getMinimallyEncodedCurrentUser,
   threadFrozenDueToBlock,
   threadFrozenDueToViewerBlock,
   rawThreadInfoFromServerThreadInfo,
   threadUIName,
   threadInfoFromRawThreadInfo,
   threadTypeDescriptions,
   memberIsAdmin,
   memberHasAdminPowers,
   roleIsAdminRole,
   threadHasAdminRole,
   identifyInvalidatedThreads,
   permissionsDisabledByBlock,
   emptyItemText,
   threadNoun,
   threadLabel,
   useWatchThread,
   useExistingThreadInfoFinder,
   getThreadTypeParentRequirement,
   threadMemberHasPermission,
   useCanCreateSidebarFromMessage,
   useSidebarExistsOrCanBeCreated,
   checkIfDefaultMembersAreVoiced,
   draftKeySuffix,
   draftKeyFromThreadID,
   threadTypeCanBePending,
   getContainingThreadID,
   getCommunity,
   getThreadListSearchResults,
   useThreadListSearch,
   removeMemberFromThread,
   switchMemberAdminRoleInThread,
   getAvailableThreadMemberActions,
   threadMembersWithoutAddedAshoat,
   patchThreadInfoToIncludeMentionedMembersOfParent,
   threadInfoInsideCommunity,
   useRoleMemberCountsForCommunity,
   useRoleUserSurfacedPermissions,
   getThreadsToDeleteText,
   useUserProfileThreadInfo,
 };
diff --git a/lib/shared/user-utils.js b/lib/shared/user-utils.js
index 05c245c8f..c9ebf5d0e 100644
--- a/lib/shared/user-utils.js
+++ b/lib/shared/user-utils.js
@@ -1,48 +1,57 @@
 // @flow
 
 import { memberHasAdminPowers } from './thread-utils.js';
 import { useENSNames } from '../hooks/ens-cache.js';
+import type {
+  MinimallyEncodedRawThreadInfo,
+  MinimallyEncodedThreadInfo,
+} from '../types/minimally-encoded-thread-permissions-types.js';
 import type {
   RawThreadInfo,
   ServerThreadInfo,
   ThreadInfo,
 } from '../types/thread-types.js';
 import type { UserInfo } from '../types/user-types.js';
 import { useSelector } from '../utils/redux-utils.js';
 
 function stringForUser(
   user: ?{
     +username?: ?string,
     +isViewer?: ?boolean,
     ...
   },
 ): string {
   if (user?.isViewer) {
     return 'you';
   }
 
   return stringForUserExplicit(user);
 }
 
 function stringForUserExplicit(user: ?{ +username: ?string, ... }): string {
   if (user?.username) {
     return user.username;
   }
 
   return 'anonymous';
 }
 
 function useKeyserverAdmin(
-  community: ThreadInfo | RawThreadInfo | ServerThreadInfo,
+  community:
+    | ThreadInfo
+    | RawThreadInfo
+    | ServerThreadInfo
+    | MinimallyEncodedThreadInfo
+    | MinimallyEncodedRawThreadInfo,
 ): ?UserInfo {
   const userInfos = useSelector(state => state.userStore.userInfos);
   // This hack only works as long as there is only one admin
   // Linear task to revert this:
   // https://linear.app/comm/issue/ENG-1707/revert-fix-getting-the-keyserver-admin-info
   const admin = community.members.find(memberHasAdminPowers);
   const adminUserInfo = admin ? userInfos[admin.id] : undefined;
   const [adminUserInfoWithENSName] = useENSNames([adminUserInfo]);
   return adminUserInfoWithENSName;
 }
 
 export { stringForUser, stringForUserExplicit, useKeyserverAdmin };
diff --git a/lib/utils/drawer-utils.react.js b/lib/utils/drawer-utils.react.js
index 0801d0043..8440cacdf 100644
--- a/lib/utils/drawer-utils.react.js
+++ b/lib/utils/drawer-utils.react.js
@@ -1,105 +1,119 @@
 // @flow
 
 import { values } from './objects.js';
 import { threadInFilterList, threadIsChannel } from '../shared/thread-utils.js';
+import type {
+  MinimallyEncodedRawThreadInfo,
+  MinimallyEncodedThreadInfo,
+} from '../types/minimally-encoded-thread-permissions-types.js';
 import { communitySubthreads } from '../types/thread-types-enum.js';
 import type {
   RawThreadInfo,
   ThreadInfo,
   ResolvedThreadInfo,
 } from '../types/thread-types.js';
 
 export type CommunityDrawerItemData<T> = {
   +threadInfo: ThreadInfo,
   +itemChildren: $ReadOnlyArray<CommunityDrawerItemData<T>>,
   +hasSubchannelsButton: boolean,
   +labelStyle: T,
 };
 
 function createRecursiveDrawerItemsData<LabelStyleType>(
   childThreadInfosMap: { +[id: string]: $ReadOnlyArray<ThreadInfo> },
   communities: $ReadOnlyArray<ResolvedThreadInfo>,
   labelStyles: $ReadOnlyArray<LabelStyleType>,
   maxDepth: number,
 ): $ReadOnlyArray<CommunityDrawerItemData<LabelStyleType>> {
   const result = communities.map(community => ({
     threadInfo: community,
     itemChildren: [],
     labelStyle: labelStyles[0],
     hasSubchannelsButton: false,
   }));
   let queue = result.map(item => [item, 0]);
 
   for (let i = 0; i < queue.length; i++) {
     const [item, lvl] = queue[i];
     const itemChildThreadInfos = childThreadInfosMap[item.threadInfo.id] ?? [];
 
     if (lvl < maxDepth) {
       item.itemChildren = itemChildThreadInfos
         .filter(childItem => communitySubthreads.includes(childItem.type))
         .map(childItem => ({
           threadInfo: childItem,
           itemChildren: [],
           labelStyle: labelStyles[Math.min(lvl + 1, labelStyles.length - 1)],
           hasSubchannelsButton:
             lvl + 1 === maxDepth &&
             threadHasSubchannels(childItem, childThreadInfosMap),
         }));
       queue = queue.concat(
         item.itemChildren.map(childItem => [childItem, lvl + 1]),
       );
     }
   }
   return result;
 }
 
 function threadHasSubchannels(
-  threadInfo: ThreadInfo,
-  childThreadInfosMap: { +[id: string]: $ReadOnlyArray<ThreadInfo> },
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
+  childThreadInfosMap: {
+    +[id: string]:
+      | $ReadOnlyArray<ThreadInfo>
+      | $ReadOnlyArray<MinimallyEncodedThreadInfo>,
+  },
 ): boolean {
   if (!childThreadInfosMap[threadInfo.id]?.length) {
     return false;
   }
   return childThreadInfosMap[threadInfo.id].some(thread =>
     threadIsChannel(thread),
   );
 }
 
 function appendSuffix(
   chats: $ReadOnlyArray<ResolvedThreadInfo>,
 ): ResolvedThreadInfo[] {
   const result = [];
   const names = new Map<string, number>();
 
   for (const chat of chats) {
     let name = chat.uiName;
     const numberOfOccurrences = names.get(name);
     names.set(name, (numberOfOccurrences ?? 0) + 1);
     if (numberOfOccurrences) {
       name = `${name} (${numberOfOccurrences.toString()})`;
     }
     result.push({ ...chat, uiName: name });
   }
   return result;
 }
 
 function filterThreadIDsBelongingToCommunity(
   communityID: string,
-  threadInfosObj: { +[id: string]: ThreadInfo | RawThreadInfo },
+  threadInfosObj: {
+    +[id: string]:
+      | ThreadInfo
+      | RawThreadInfo
+      | MinimallyEncodedThreadInfo
+      | MinimallyEncodedRawThreadInfo,
+  },
 ): $ReadOnlySet<string> {
   const threadInfos = values(threadInfosObj);
   const threadIDs = threadInfos
     .filter(
       thread =>
         (thread.community === communityID || thread.id === communityID) &&
         threadInFilterList(thread),
     )
     .map(item => item.id);
   return new Set(threadIDs);
 }
 
 export {
   createRecursiveDrawerItemsData,
   appendSuffix,
   filterThreadIDsBelongingToCommunity,
 };
diff --git a/lib/utils/entity-text.js b/lib/utils/entity-text.js
index 3753f782f..51e8bb89d 100644
--- a/lib/utils/entity-text.js
+++ b/lib/utils/entity-text.js
@@ -1,592 +1,604 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
 import t, { type TInterface, type TUnion } from 'tcomb';
 
 import type { GetENSNames } from './ens-helpers.js';
 import { tID, tShape, tString } from './validation-utils.js';
 import { useENSNames, type UseENSNamesOptions } from '../hooks/ens-cache.js';
 import { threadNoun } from '../shared/thread-utils.js';
 import { stringForUser } from '../shared/user-utils.js';
+import type {
+  MinimallyEncodedRawThreadInfo,
+  MinimallyEncodedThreadInfo,
+} from '../types/minimally-encoded-thread-permissions-types.js';
 import {
   type ThreadType,
   threadTypes,
   threadTypeValidator,
 } from '../types/thread-types-enum.js';
 import { type RawThreadInfo, type ThreadInfo } from '../types/thread-types.js';
 import { basePluralize } from '../utils/text-utils.js';
 
 export type UserEntity = {
   +type: 'user',
   +id: string,
   +username?: ?string,
   +isViewer?: ?boolean,
   +possessive?: ?boolean, // eg. `user's` instead of `user`
 };
 export const userEntityValidator: TInterface<UserEntity> = tShape<UserEntity>({
   type: tString('user'),
   id: t.String,
   username: t.maybe(t.String),
   isViewer: t.maybe(t.Boolean),
   possessive: t.maybe(t.Boolean),
 });
 
 // Comments explain how thread name will appear from user4's perspective
 export type ThreadEntity =
   | {
       +type: 'thread',
       +id: string,
       +name?: ?string,
       // displays threadInfo.name if set, or 'user1, user2, and user3'
       +display: 'uiName',
       // If uiName is EntityText, then at render time ThreadEntity will be
       // replaced with a pluralized list of uiName's UserEntities
       +uiName: $ReadOnlyArray<UserEntity> | string,
       // If name isn't set and uiName is an array with only the viewer, then
       // just_you_string displays "just you" but viewer_username displays the
       // viewer's ENS-resolved username. Defaults to just_you_string
       +ifJustViewer?: 'just_you_string' | 'viewer_username',
     }
   | {
       +type: 'thread',
       +id: string,
       +name?: ?string,
       // displays threadInfo.name if set, or eg. 'this thread' or 'this chat'
       +display: 'shortName',
       +threadType?: ?ThreadType,
       +parentThreadID?: ?string,
       +alwaysDisplayShortName?: ?boolean, // don't default to name
       +subchannel?: ?boolean, // short name should be "subchannel"
       +possessive?: ?boolean, // eg. `this thread's` instead of `this thread`
     };
 
 export const threadEntityValidator: TUnion<ThreadEntity> = t.union([
   tShape({
     type: tString('thread'),
     id: tID,
     name: t.maybe(t.String),
     display: tString('uiName'),
     uiName: t.union([t.list(userEntityValidator), t.String]),
     ifJustViewer: t.maybe(t.enums.of(['just_you_string', 'viewer_username'])),
   }),
   tShape({
     type: tString('thread'),
     id: tID,
     name: t.maybe(t.String),
     display: tString('shortName'),
     threadType: t.maybe(threadTypeValidator),
     parentThreadID: t.maybe(tID),
     alwaysDisplayShortName: t.maybe(t.Boolean),
     subchannel: t.maybe(t.Boolean),
     possessive: t.maybe(t.Boolean),
   }),
 ]);
 
 type ColorEntity = {
   +type: 'color',
   +hex: string,
 };
 
 type EntityTextComponent = UserEntity | ThreadEntity | ColorEntity | string;
 
 export type EntityText = $ReadOnlyArray<EntityTextComponent>;
 
 const entityTextFunction = (
   strings: $ReadOnlyArray<string>,
   ...entities: $ReadOnlyArray<EntityTextComponent | EntityText>
 ) => {
   const result = [];
   for (let i = 0; i < strings.length; i++) {
     const str = strings[i];
     if (str) {
       result.push(str);
     }
     const entity = entities[i];
     if (!entity) {
       continue;
     }
 
     if (typeof entity === 'string') {
       const lastResult = result.length > 0 && result[result.length - 1];
       if (typeof lastResult === 'string') {
         result[result.length - 1] = lastResult + entity;
       } else {
         result.push(entity);
       }
     } else if (Array.isArray(entity)) {
       const [firstEntity, ...restOfEntity] = entity;
       const lastResult = result.length > 0 && result[result.length - 1];
       if (typeof lastResult === 'string' && typeof firstEntity === 'string') {
         result[result.length - 1] = lastResult + firstEntity;
       } else if (firstEntity) {
         result.push(firstEntity);
       }
       result.push(...restOfEntity);
     } else {
       result.push(entity);
     }
   }
   return result;
 };
 
 // defaults to shortName
 type EntityTextThreadInput =
   | {
       +display: 'uiName',
-      +threadInfo: ThreadInfo,
+      +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
     }
   | {
       +display?: 'shortName',
-      +threadInfo: ThreadInfo | RawThreadInfo,
+      +threadInfo:
+        | ThreadInfo
+        | RawThreadInfo
+        | MinimallyEncodedThreadInfo
+        | MinimallyEncodedRawThreadInfo,
       +subchannel?: ?boolean,
       +possessive?: ?boolean,
     }
   | {
       +display: 'alwaysDisplayShortName',
-      +threadInfo: ThreadInfo | RawThreadInfo,
+      +threadInfo:
+        | ThreadInfo
+        | RawThreadInfo
+        | MinimallyEncodedThreadInfo
+        | MinimallyEncodedRawThreadInfo,
       +possessive?: ?boolean,
     }
   | {
       +display: 'alwaysDisplayShortName',
       +threadID: string,
       +parentThreadID?: ?string,
       +threadType?: ?ThreadType,
       +possessive?: ?boolean,
     };
 // ESLint doesn't recognize that invariant always throws
 // eslint-disable-next-line consistent-return
 entityTextFunction.thread = (input: EntityTextThreadInput) => {
   if (input.display === 'uiName') {
     const { threadInfo } = input;
     if (typeof threadInfo.uiName !== 'string') {
       return threadInfo.uiName;
     }
     return {
       type: 'thread',
       id: threadInfo.id,
       name: threadInfo.name,
       display: 'uiName',
       uiName: threadInfo.uiName,
     };
   }
   if (input.display === 'alwaysDisplayShortName' && input.threadID) {
     const { threadID, threadType, parentThreadID, possessive } = input;
     return {
       type: 'thread',
       id: threadID,
       name: undefined,
       display: 'shortName',
       threadType,
       parentThreadID,
       alwaysDisplayShortName: true,
       possessive,
     };
   } else if (input.display === 'alwaysDisplayShortName' && input.threadInfo) {
     const { threadInfo, possessive } = input;
     return {
       type: 'thread',
       id: threadInfo.id,
       name: threadInfo.name,
       display: 'shortName',
       threadType: threadInfo.type,
       parentThreadID: threadInfo.parentThreadID,
       alwaysDisplayShortName: true,
       possessive,
     };
   } else if (input.display === 'shortName' || !input.display) {
     const { threadInfo, subchannel, possessive } = input;
     return {
       type: 'thread',
       id: threadInfo.id,
       name: threadInfo.name,
       display: 'shortName',
       threadType: threadInfo.type,
       parentThreadID: threadInfo.parentThreadID,
       subchannel,
       possessive,
     };
   }
   invariant(
     false,
     `ET.thread passed unexpected display type: ${input.display}`,
   );
 };
 
 type EntityTextUserInput = {
   +userInfo: {
     +id: string,
     +username?: ?string,
     +isViewer?: ?boolean,
     ...
   },
   +possessive?: ?boolean,
 };
 entityTextFunction.user = (input: EntityTextUserInput) => ({
   type: 'user',
   id: input.userInfo.id,
   username: input.userInfo.username,
   isViewer: input.userInfo.isViewer,
   possessive: input.possessive,
 });
 
 type EntityTextColorInput = { +hex: string };
 entityTextFunction.color = (input: EntityTextColorInput) => ({
   type: 'color',
   hex: input.hex,
 });
 
 // ET is a JS tag function used in template literals, eg. ET`something`
 // It allows you to compose raw text and "entities" together
 type EntityTextFunction = ((
   strings: $ReadOnlyArray<string>,
   ...entities: $ReadOnlyArray<EntityTextComponent | EntityText>
 ) => EntityText) & {
   +thread: EntityTextThreadInput => ThreadEntity,
   +user: EntityTextUserInput => UserEntity,
   +color: EntityTextColorInput => ColorEntity,
   ...
 };
 const ET: EntityTextFunction = entityTextFunction;
 
 type MakePossessiveInput = { +str: string, +isViewer?: ?boolean };
 function makePossessive(input: MakePossessiveInput) {
   if (input.isViewer) {
     return 'your';
   }
   return `${input.str}’s`;
 }
 
 function getNameForThreadEntity(
   entity: ThreadEntity,
   params?: ?EntityTextToRawStringParams,
 ): string {
   const { name: userGeneratedName, display } = entity;
   if (entity.display === 'uiName') {
     if (userGeneratedName) {
       return userGeneratedName;
     }
     const { uiName } = entity;
     if (typeof uiName === 'string') {
       return uiName;
     }
 
     let userEntities = uiName;
     if (!params?.ignoreViewer) {
       const viewerFilteredUserEntities = userEntities.filter(
         innerEntity => !innerEntity.isViewer,
       );
       if (viewerFilteredUserEntities.length > 0) {
         userEntities = viewerFilteredUserEntities;
       } else if (entity.ifJustViewer === 'viewer_username') {
         // We pass ignoreViewer to entityTextToRawString in order
         // to prevent it from rendering the viewer as "you"
         params = { ...params, ignoreViewer: true };
       } else {
         return 'just you';
       }
     }
 
     const pluralized = pluralizeEntityText(
       userEntities.map(innerEntity => [innerEntity]),
     );
     return entityTextToRawString(pluralized, params);
   }
 
   invariant(
     entity.display === 'shortName',
     `getNameForThreadEntity can't handle thread entity display ${display}`,
   );
 
   let { name } = entity;
   if (!name || entity.alwaysDisplayShortName) {
     const threadType = entity.threadType ?? threadTypes.PERSONAL;
     const { parentThreadID } = entity;
     const noun = entity.subchannel
       ? 'subchannel'
       : threadNoun(threadType, parentThreadID);
     if (entity.id === params?.threadID) {
       const prefixThisThreadNounWith =
         params?.prefixThisThreadNounWith === 'your' ? 'your' : 'this';
       name = `${prefixThisThreadNounWith} ${noun}`;
     } else {
       name = `a ${noun}`;
     }
   }
   if (entity.possessive) {
     name = makePossessive({ str: name });
   }
   return name;
 }
 
 function getNameForUserEntity(
   entity: UserEntity,
   ignoreViewer: ?boolean,
 ): string {
   const isViewer = entity.isViewer && !ignoreViewer;
   const entityWithIsViewerIgnored = { ...entity, isViewer };
   const str = stringForUser(entityWithIsViewerIgnored);
   if (!entityWithIsViewerIgnored.possessive) {
     return str;
   }
   return makePossessive({ str, isViewer });
 }
 
 type EntityTextToRawStringParams = {
   +threadID?: ?string,
   +ignoreViewer?: ?boolean,
   +prefixThisThreadNounWith?: ?('this' | 'your'),
 };
 function entityTextToRawString(
   entityText: EntityText,
   params?: ?EntityTextToRawStringParams,
 ): string {
   // ESLint doesn't recognize that invariant always throws
   // eslint-disable-next-line consistent-return
   const textParts = entityText.map(entity => {
     if (typeof entity === 'string') {
       return entity;
     } else if (entity.type === 'thread') {
       return getNameForThreadEntity(entity, params);
     } else if (entity.type === 'color') {
       return entity.hex;
     } else if (entity.type === 'user') {
       return getNameForUserEntity(entity, params?.ignoreViewer);
     } else {
       invariant(
         false,
         `entityTextToRawString can't handle entity type ${entity.type}`,
       );
     }
   });
   return textParts.join('');
 }
 
 type RenderFunctions = {
   +renderText: ({ +text: string }) => React.Node,
   +renderThread: ({ +id: string, +name: string }) => React.Node,
   +renderUser: ({ +userID: string, +usernameText: string }) => React.Node,
   +renderColor: ({ +hex: string }) => React.Node,
 };
 function entityTextToReact(
   entityText: EntityText,
   threadID: string,
   renderFuncs: RenderFunctions,
 ): React.Node {
   const { renderText, renderThread, renderUser, renderColor } = renderFuncs;
   // ESLint doesn't recognize that invariant always throws
   // eslint-disable-next-line consistent-return
   return entityText.map((entity, i) => {
     const key = `text${i}`;
     if (typeof entity === 'string') {
       return (
         <React.Fragment key={key}>
           {renderText({ text: entity })}
         </React.Fragment>
       );
     } else if (entity.type === 'thread') {
       const { id } = entity;
       const name = getNameForThreadEntity(entity, { threadID });
       if (id === threadID) {
         return name;
       } else {
         return (
           <React.Fragment key={key}>
             {renderThread({ id, name })}
           </React.Fragment>
         );
       }
     } else if (entity.type === 'color') {
       return (
         <React.Fragment key={key}>
           {renderColor({ hex: entity.hex })}
         </React.Fragment>
       );
     } else if (entity.type === 'user') {
       const userID = entity.id;
       const usernameText = getNameForUserEntity(entity);
 
       return (
         <React.Fragment key={key}>
           {renderUser({ userID, usernameText })}
         </React.Fragment>
       );
     } else {
       invariant(
         false,
         `entityTextToReact can't handle entity type ${entity.type}`,
       );
     }
   });
 }
 
 function pluralizeEntityText(
   nouns: $ReadOnlyArray<EntityText>,
   maxNumberOfNouns: number = 3,
 ): EntityText {
   return basePluralize<EntityText>(
     nouns,
     maxNumberOfNouns,
     (a: EntityText | string, b: ?EntityText | string) =>
       b ? ET`${a}${b}` : ET`${a}`,
   );
 }
 
 type TextEntity = { +type: 'text', +text: string };
 type ShadowUserEntity = {
   +type: 'shadowUser',
   +username: string,
   +originalUsername: string,
 };
 type EntityTextComponentAsObject =
   | UserEntity
   | ThreadEntity
   | ColorEntity
   | TextEntity
   | ShadowUserEntity;
 function entityTextToObjects(
   entityText: EntityText,
 ): EntityTextComponentAsObject[] {
   const objs = [];
   for (const entity of entityText) {
     if (typeof entity === 'string') {
       objs.push({ type: 'text', text: entity });
       continue;
     }
     objs.push(entity);
     if (
       entity.type === 'thread' &&
       entity.display === 'uiName' &&
       typeof entity.uiName !== 'string'
     ) {
       for (const innerEntity of entity.uiName) {
         if (typeof innerEntity === 'string' || innerEntity.type !== 'user') {
           continue;
         }
         const { username } = innerEntity;
         if (username) {
           objs.push({
             type: 'shadowUser',
             originalUsername: username,
             username,
           });
         }
       }
     }
   }
   return objs;
 }
 function entityTextFromObjects(
   objects: $ReadOnlyArray<EntityTextComponentAsObject>,
 ): EntityText {
   const shadowUserMap = new Map<string, string>();
   for (const obj of objects) {
     if (obj.type === 'shadowUser' && obj.username !== obj.originalUsername) {
       shadowUserMap.set(obj.originalUsername, obj.username);
     }
   }
   return objects
     .map(entity => {
       if (entity.type === 'text') {
         return entity.text;
       } else if (entity.type === 'shadowUser') {
         return null;
       } else if (
         entity.type === 'thread' &&
         entity.display === 'uiName' &&
         typeof entity.uiName !== 'string'
       ) {
         const uiName = [];
         let changeOccurred = false;
         for (const innerEntity of entity.uiName) {
           if (typeof innerEntity === 'string' || innerEntity.type !== 'user') {
             uiName.push(innerEntity);
             continue;
           }
           const { username } = innerEntity;
           if (!username) {
             uiName.push(innerEntity);
             continue;
           }
           const ensName = shadowUserMap.get(username);
           if (!ensName) {
             uiName.push(innerEntity);
             continue;
           }
           changeOccurred = true;
           uiName.push({
             ...innerEntity,
             username: ensName,
           });
         }
         if (!changeOccurred) {
           return entity;
         }
         return {
           ...entity,
           uiName,
         };
       } else {
         return entity;
       }
     })
     .filter(Boolean);
 }
 
 function useENSNamesForEntityText(
   entityText: ?EntityText,
   options?: ?UseENSNamesOptions,
 ): ?EntityText {
   const allObjects = React.useMemo(
     () => (entityText ? entityTextToObjects(entityText) : []),
     [entityText],
   );
   const objectsWithENSNames = useENSNames(allObjects, options);
   return React.useMemo(
     () =>
       entityText ? entityTextFromObjects(objectsWithENSNames) : entityText,
     [entityText, objectsWithENSNames],
   );
 }
 
 function useEntityTextAsString(
   entityText: ?EntityText,
   params?: EntityTextToRawStringParams,
 ): ?string {
   const withENSNames = useENSNamesForEntityText(entityText);
   return React.useMemo(() => {
     if (!withENSNames) {
       return withENSNames;
     }
     return entityTextToRawString(withENSNames, params);
   }, [withENSNames, params]);
 }
 
 async function getEntityTextAsString(
   entityText: ?EntityText,
   getENSNames: ?GetENSNames,
   params?: EntityTextToRawStringParams,
 ): Promise<?string> {
   if (!entityText) {
     return entityText;
   }
 
   let resolvedEntityText = entityText;
   if (getENSNames) {
     const allObjects = entityTextToObjects(entityText);
     const objectsWithENSNames = await getENSNames(allObjects);
     resolvedEntityText = entityTextFromObjects(objectsWithENSNames);
   }
 
   return entityTextToRawString(resolvedEntityText, params);
 }
 
 export {
   ET,
   entityTextToRawString,
   entityTextToReact,
   pluralizeEntityText,
   useENSNamesForEntityText,
   useEntityTextAsString,
   getEntityTextAsString,
 };
diff --git a/lib/utils/role-utils.js b/lib/utils/role-utils.js
index fa7234959..f038646fa 100644
--- a/lib/utils/role-utils.js
+++ b/lib/utils/role-utils.js
@@ -1,126 +1,133 @@
 // @flow
 
 import * as React from 'react';
 
 import { useSelector } from './redux-utils.js';
 import { threadInfoSelector } from '../selectors/thread-selectors.js';
+import type {
+  MinimallyEncodedRelativeMemberInfo,
+  MinimallyEncodedRoleInfo,
+  MinimallyEncodedThreadInfo,
+} from '../types/minimally-encoded-thread-permissions-types.js';
 import {
   type UserSurfacedPermissionOption,
   userSurfacedPermissions,
   userSurfacedPermissionOptions,
 } from '../types/thread-permission-types.js';
 import { type ThreadType, threadTypes } from '../types/thread-types-enum.js';
 import type {
   ThreadInfo,
   RelativeMemberInfo,
   RoleInfo,
 } from '../types/thread-types.js';
 
 function useFilterPermissionOptionsByThreadType(
   threadType: ThreadType,
 ): $ReadOnlySet<UserSurfacedPermissionOption> {
   // If the thread is a community announcement root, we want to allow
   // the option to be voiced in the announcement channels. Otherwise,
   // we want to remove that option from being configured since this will
   // be guaranteed on the keyserver.
   const shouldFilterVoicedInAnnouncementChannel =
     threadType === threadTypes.COMMUNITY_ROOT;
 
   return React.useMemo(() => {
     if (!shouldFilterVoicedInAnnouncementChannel) {
       return userSurfacedPermissionOptions;
     }
 
     return new Set(
       [...userSurfacedPermissionOptions].filter(
         option =>
           option.userSurfacedPermission !==
           userSurfacedPermissions.VOICED_IN_ANNOUNCEMENT_CHANNELS,
       ),
     );
   }, [shouldFilterVoicedInAnnouncementChannel]);
 }
 
 function constructRoleDeletionMessagePrompt(
   defaultRoleName: string,
   memberCount: number,
 ): string {
   let message;
   if (memberCount === 0) {
     message = 'Are you sure you want to delete this role?';
   } else {
     const messageNoun = memberCount === 1 ? 'member' : 'members';
     const messageVerb = memberCount === 1 ? 'is' : 'are';
     message =
       `There ${messageVerb} currently ${memberCount} ${messageNoun} with ` +
       `this role. Deleting the role will automatically assign the ` +
       `${messageNoun} affected to the ${defaultRoleName} role.`;
   }
 
   return message;
 }
 
 type RoleDeletableAndEditableStatus = {
   +isDeletable: boolean,
   +isEditable: boolean,
 };
 function useRoleDeletableAndEditableStatus(
   roleName: string,
   defaultRoleID: string,
   existingRoleID: string,
 ): RoleDeletableAndEditableStatus {
   return React.useMemo(() => {
     const canDelete = roleName !== 'Admins' && defaultRoleID !== existingRoleID;
     const canEdit = roleName !== 'Admins';
 
     return {
       isDeletable: canDelete,
       isEditable: canEdit,
     };
   }, [roleName, defaultRoleID, existingRoleID]);
 }
 
 function useRolesFromCommunityThreadInfo(
-  threadInfo: ThreadInfo,
-  memberInfos: $ReadOnlyArray<RelativeMemberInfo>,
-): $ReadOnlyMap<string, ?RoleInfo> {
+  threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
+  memberInfos: $ReadOnlyArray<
+    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  >,
+): $ReadOnlyMap<string, ?RoleInfo | ?MinimallyEncodedRoleInfo> {
   // Our in-code system has chat-specific roles, while the
   // user-surfaced system has roles only for communities. We retrieve roles
   // from the top-level community thread for accuracy, with a rare fallback
   // for potential issues reading memberInfos, primarily in GENESIS threads.
   // The special case is GENESIS threads, since per prior discussion
   // (see context: https://linear.app/comm/issue/ENG-4077/), we don't really
   // support roles for it. Also with GENESIS, the list of members are not
   // populated in the community root. So in this case to prevent crashing, we
   // should just return the role name from the current thread info.
   const { community } = threadInfo;
   const communityThreadInfo = useSelector(state =>
     community ? threadInfoSelector(state)[community] : null,
   );
   const topMostThreadInfo = communityThreadInfo || threadInfo;
   const roleMap = new Map();
 
   if (topMostThreadInfo.type === threadTypes.GENESIS) {
     memberInfos.forEach(memberInfo =>
       roleMap.set(
         memberInfo.id,
         memberInfo.role ? threadInfo.roles[memberInfo.role] : null,
       ),
     );
     return roleMap;
   }
 
   const { members: memberInfosFromTopMostThreadInfo, roles } =
     topMostThreadInfo;
   memberInfosFromTopMostThreadInfo.forEach(memberInfo => {
     roleMap.set(memberInfo.id, memberInfo.role ? roles[memberInfo.role] : null);
   });
   return roleMap;
 }
 
 export {
   useFilterPermissionOptionsByThreadType,
   constructRoleDeletionMessagePrompt,
   useRoleDeletableAndEditableStatus,
   useRolesFromCommunityThreadInfo,
 };
diff --git a/lib/utils/toggle-pin-utils.js b/lib/utils/toggle-pin-utils.js
index 417105788..08a34dedb 100644
--- a/lib/utils/toggle-pin-utils.js
+++ b/lib/utils/toggle-pin-utils.js
@@ -1,22 +1,30 @@
 // @flow
 
 import { isInvalidPinSourceForThread } from '../shared/message-utils.js';
 import { threadHasPermission } from '../shared/thread-utils.js';
 import type { RawMessageInfo, MessageInfo } from '../types/message-types.js';
+import type {
+  MinimallyEncodedRawThreadInfo,
+  MinimallyEncodedThreadInfo,
+} from '../types/minimally-encoded-thread-permissions-types.js';
 import { threadPermissions } from '../types/thread-permission-types.js';
 import type { RawThreadInfo, ThreadInfo } from '../types/thread-types.js';
 
 function canToggleMessagePin(
   messageInfo: RawMessageInfo | MessageInfo,
-  threadInfo: RawThreadInfo | ThreadInfo,
+  threadInfo:
+    | RawThreadInfo
+    | ThreadInfo
+    | MinimallyEncodedRawThreadInfo
+    | MinimallyEncodedThreadInfo,
 ): boolean {
   const isValidMessage = !isInvalidPinSourceForThread(messageInfo, threadInfo);
   const hasManagePinsPermission = threadHasPermission(
     threadInfo,
     threadPermissions.MANAGE_PINS,
   );
 
   return isValidMessage && hasManagePinsPermission;
 }
 
 export { canToggleMessagePin };