diff --git a/keyserver/src/creators/role-creator.js b/keyserver/src/creators/role-creator.js
--- a/keyserver/src/creators/role-creator.js
+++ b/keyserver/src/creators/role-creator.js
@@ -1,14 +1,7 @@
 // @flow
 
-import {
-  type RoleInfo,
-  threadPermissions,
-  threadPermissionPropagationPrefixes,
-  threadPermissionFilterPrefixes,
-  type ThreadRolePermissionsBlob,
-  type ThreadType,
-  threadTypes,
-} from 'lib/types/thread-types.js';
+import { getRolePermissionBlobs } from 'lib/permissions/thread-permissions.js';
+import type { RoleInfo, ThreadType } from 'lib/types/thread-types.js';
 
 import createIDs from './id-creator.js';
 import { dbQuery, SQL } from '../database/database.js';
@@ -65,255 +58,4 @@
   };
 }
 
-type RolePermissionBlobs = {
-  +Members: ThreadRolePermissionsBlob,
-  +Admins?: ThreadRolePermissionsBlob,
-};
-
-const { CHILD, DESCENDANT } = threadPermissionPropagationPrefixes;
-const { OPEN, TOP_LEVEL, OPEN_TOP_LEVEL } = threadPermissionFilterPrefixes;
-const OPEN_CHILD = CHILD + OPEN;
-const OPEN_DESCENDANT = DESCENDANT + OPEN;
-const TOP_LEVEL_DESCENDANT = DESCENDANT + TOP_LEVEL;
-const OPEN_TOP_LEVEL_DESCENDANT = DESCENDANT + OPEN_TOP_LEVEL;
-
-const voicedPermissions = {
-  [threadPermissions.VOICED]: true,
-  [threadPermissions.EDIT_ENTRIES]: true,
-  [threadPermissions.EDIT_THREAD_NAME]: true,
-  [threadPermissions.EDIT_THREAD_COLOR]: true,
-  [threadPermissions.EDIT_THREAD_DESCRIPTION]: true,
-  [threadPermissions.EDIT_THREAD_AVATAR]: true,
-  [threadPermissions.CREATE_SUBCHANNELS]: true,
-  [threadPermissions.ADD_MEMBERS]: true,
-};
-
-function getRolePermissionBlobsForCommunity(
-  threadType: ThreadType,
-): RolePermissionBlobs {
-  const openDescendantKnowOf = OPEN_DESCENDANT + threadPermissions.KNOW_OF;
-  const openDescendantVisible = OPEN_DESCENDANT + threadPermissions.VISIBLE;
-  const openTopLevelDescendantJoinThread =
-    OPEN_TOP_LEVEL_DESCENDANT + threadPermissions.JOIN_THREAD;
-  const openChildJoinThread = OPEN_CHILD + threadPermissions.JOIN_THREAD;
-  const openChildAddMembers = OPEN_CHILD + threadPermissions.ADD_MEMBERS;
-
-  const genesisMemberPermissions = {
-    [threadPermissions.KNOW_OF]: true,
-    [threadPermissions.VISIBLE]: true,
-    [openDescendantKnowOf]: true,
-    [openDescendantVisible]: true,
-    [openTopLevelDescendantJoinThread]: true,
-  };
-  const baseMemberPermissions = {
-    ...genesisMemberPermissions,
-    [threadPermissions.REACT_TO_MESSAGE]: true,
-    [threadPermissions.EDIT_MESSAGE]: true,
-    [threadPermissions.LEAVE_THREAD]: true,
-    [threadPermissions.CREATE_SIDEBARS]: true,
-    [threadPermissions.ADD_MEMBERS]: true,
-    [openChildJoinThread]: true,
-    [openChildAddMembers]: true,
-  };
-
-  let memberPermissions;
-  if (threadType === threadTypes.COMMUNITY_ANNOUNCEMENT_ROOT) {
-    memberPermissions = baseMemberPermissions;
-  } else if (threadType === threadTypes.GENESIS) {
-    memberPermissions = genesisMemberPermissions;
-  } else {
-    memberPermissions = {
-      ...baseMemberPermissions,
-      ...voicedPermissions,
-    };
-  }
-
-  const descendantKnowOf = DESCENDANT + threadPermissions.KNOW_OF;
-  const descendantVisible = DESCENDANT + threadPermissions.VISIBLE;
-  const topLevelDescendantJoinThread =
-    TOP_LEVEL_DESCENDANT + threadPermissions.JOIN_THREAD;
-  const childJoinThread = CHILD + threadPermissions.JOIN_THREAD;
-  const descendantVoiced = DESCENDANT + threadPermissions.VOICED;
-  const descendantEditEntries = DESCENDANT + threadPermissions.EDIT_ENTRIES;
-  const descendantEditThreadName =
-    DESCENDANT + threadPermissions.EDIT_THREAD_NAME;
-  const descendantEditThreadColor =
-    DESCENDANT + threadPermissions.EDIT_THREAD_COLOR;
-  const descendantEditThreadDescription =
-    DESCENDANT + threadPermissions.EDIT_THREAD_DESCRIPTION;
-  const descendantEditThreadAvatar =
-    DESCENDANT + threadPermissions.EDIT_THREAD_AVATAR;
-  const topLevelDescendantCreateSubchannels =
-    TOP_LEVEL_DESCENDANT + threadPermissions.CREATE_SUBCHANNELS;
-  const topLevelDescendantCreateSidebars =
-    TOP_LEVEL_DESCENDANT + threadPermissions.CREATE_SIDEBARS;
-  const descendantAddMembers = DESCENDANT + threadPermissions.ADD_MEMBERS;
-  const descendantDeleteThread = DESCENDANT + threadPermissions.DELETE_THREAD;
-  const descendantEditPermissions =
-    DESCENDANT + threadPermissions.EDIT_PERMISSIONS;
-  const descendantRemoveMembers = DESCENDANT + threadPermissions.REMOVE_MEMBERS;
-  const descendantChangeRole = DESCENDANT + threadPermissions.CHANGE_ROLE;
-  const descendantManagePins = DESCENDANT + threadPermissions.MANAGE_PINS;
-
-  const baseAdminPermissions = {
-    [threadPermissions.KNOW_OF]: true,
-    [threadPermissions.VISIBLE]: true,
-    [threadPermissions.VOICED]: true,
-    [threadPermissions.REACT_TO_MESSAGE]: true,
-    [threadPermissions.EDIT_MESSAGE]: true,
-    [threadPermissions.EDIT_ENTRIES]: true,
-    [threadPermissions.EDIT_THREAD_NAME]: true,
-    [threadPermissions.EDIT_THREAD_COLOR]: true,
-    [threadPermissions.EDIT_THREAD_DESCRIPTION]: true,
-    [threadPermissions.EDIT_THREAD_AVATAR]: true,
-    [threadPermissions.CREATE_SUBCHANNELS]: true,
-    [threadPermissions.CREATE_SIDEBARS]: true,
-    [threadPermissions.ADD_MEMBERS]: true,
-    [threadPermissions.DELETE_THREAD]: true,
-    [threadPermissions.REMOVE_MEMBERS]: true,
-    [threadPermissions.CHANGE_ROLE]: true,
-    [threadPermissions.MANAGE_PINS]: true,
-    [descendantKnowOf]: true,
-    [descendantVisible]: true,
-    [topLevelDescendantJoinThread]: true,
-    [childJoinThread]: true,
-    [descendantVoiced]: true,
-    [descendantEditEntries]: true,
-    [descendantEditThreadName]: true,
-    [descendantEditThreadColor]: true,
-    [descendantEditThreadDescription]: true,
-    [descendantEditThreadAvatar]: true,
-    [topLevelDescendantCreateSubchannels]: true,
-    [topLevelDescendantCreateSidebars]: true,
-    [descendantAddMembers]: true,
-    [descendantDeleteThread]: true,
-    [descendantEditPermissions]: true,
-    [descendantRemoveMembers]: true,
-    [descendantChangeRole]: true,
-    [descendantManagePins]: true,
-  };
-
-  let adminPermissions;
-  if (threadType === threadTypes.GENESIS) {
-    adminPermissions = baseAdminPermissions;
-  } else {
-    adminPermissions = {
-      ...baseAdminPermissions,
-      [threadPermissions.LEAVE_THREAD]: true,
-    };
-  }
-
-  return {
-    Members: memberPermissions,
-    Admins: adminPermissions,
-  };
-}
-
-function getRolePermissionBlobs(threadType: ThreadType): RolePermissionBlobs {
-  if (threadType === threadTypes.SIDEBAR) {
-    const memberPermissions = {
-      [threadPermissions.VOICED]: true,
-      [threadPermissions.REACT_TO_MESSAGE]: true,
-      [threadPermissions.EDIT_MESSAGE]: true,
-      [threadPermissions.EDIT_THREAD_NAME]: true,
-      [threadPermissions.EDIT_THREAD_COLOR]: true,
-      [threadPermissions.EDIT_THREAD_DESCRIPTION]: true,
-      [threadPermissions.EDIT_THREAD_AVATAR]: true,
-      [threadPermissions.ADD_MEMBERS]: true,
-      [threadPermissions.EDIT_PERMISSIONS]: true,
-      [threadPermissions.REMOVE_MEMBERS]: true,
-      [threadPermissions.LEAVE_THREAD]: true,
-    };
-    return {
-      Members: memberPermissions,
-    };
-  }
-
-  const openDescendantKnowOf = OPEN_DESCENDANT + threadPermissions.KNOW_OF;
-  const openDescendantVisible = OPEN_DESCENDANT + threadPermissions.VISIBLE;
-  const openChildJoinThread = OPEN_CHILD + threadPermissions.JOIN_THREAD;
-
-  if (threadType === threadTypes.PRIVATE) {
-    const memberPermissions = {
-      [threadPermissions.KNOW_OF]: true,
-      [threadPermissions.VISIBLE]: true,
-      [threadPermissions.VOICED]: true,
-      [threadPermissions.REACT_TO_MESSAGE]: true,
-      [threadPermissions.EDIT_MESSAGE]: true,
-      [threadPermissions.EDIT_THREAD_COLOR]: true,
-      [threadPermissions.EDIT_THREAD_DESCRIPTION]: true,
-      [threadPermissions.CREATE_SIDEBARS]: true,
-      [threadPermissions.EDIT_ENTRIES]: true,
-      [openDescendantKnowOf]: true,
-      [openDescendantVisible]: true,
-      [openChildJoinThread]: true,
-    };
-    return {
-      Members: memberPermissions,
-    };
-  }
-
-  if (threadType === threadTypes.PERSONAL) {
-    return {
-      Members: {
-        [threadPermissions.KNOW_OF]: true,
-        [threadPermissions.VISIBLE]: true,
-        [threadPermissions.VOICED]: true,
-        [threadPermissions.REACT_TO_MESSAGE]: true,
-        [threadPermissions.EDIT_MESSAGE]: true,
-        [threadPermissions.EDIT_ENTRIES]: true,
-        [threadPermissions.EDIT_THREAD_NAME]: true,
-        [threadPermissions.EDIT_THREAD_COLOR]: true,
-        [threadPermissions.EDIT_THREAD_DESCRIPTION]: true,
-        [threadPermissions.CREATE_SIDEBARS]: true,
-        [openDescendantKnowOf]: true,
-        [openDescendantVisible]: true,
-        [openChildJoinThread]: true,
-      },
-    };
-  }
-
-  const openTopLevelDescendantJoinThread =
-    OPEN_TOP_LEVEL_DESCENDANT + threadPermissions.JOIN_THREAD;
-
-  const subthreadBasePermissions = {
-    [threadPermissions.KNOW_OF]: true,
-    [threadPermissions.VISIBLE]: true,
-    [threadPermissions.REACT_TO_MESSAGE]: true,
-    [threadPermissions.EDIT_MESSAGE]: true,
-    [threadPermissions.CREATE_SIDEBARS]: true,
-    [threadPermissions.LEAVE_THREAD]: true,
-    [openDescendantKnowOf]: true,
-    [openDescendantVisible]: true,
-    [openTopLevelDescendantJoinThread]: true,
-    [openChildJoinThread]: true,
-  };
-
-  if (
-    threadType === threadTypes.COMMUNITY_OPEN_SUBTHREAD ||
-    threadType === threadTypes.COMMUNITY_SECRET_SUBTHREAD
-  ) {
-    const memberPermissions = {
-      [threadPermissions.REMOVE_MEMBERS]: true,
-      [threadPermissions.EDIT_PERMISSIONS]: true,
-      ...subthreadBasePermissions,
-      ...voicedPermissions,
-    };
-    return {
-      Members: memberPermissions,
-    };
-  }
-
-  if (
-    threadType === threadTypes.COMMUNITY_OPEN_ANNOUNCEMENT_SUBTHREAD ||
-    threadType === threadTypes.COMMUNITY_SECRET_ANNOUNCEMENT_SUBTHREAD
-  ) {
-    return {
-      Members: subthreadBasePermissions,
-    };
-  }
-
-  return getRolePermissionBlobsForCommunity(threadType);
-}
-
-export { createInitialRolesForNewThread, getRolePermissionBlobs };
+export { createInitialRolesForNewThread };
diff --git a/keyserver/src/creators/thread-creator.js b/keyserver/src/creators/thread-creator.js
--- a/keyserver/src/creators/thread-creator.js
+++ b/keyserver/src/creators/thread-creator.js
@@ -4,6 +4,7 @@
 
 import bots from 'lib/facts/bots.js';
 import genesis from 'lib/facts/genesis.js';
+import { getRolePermissionBlobs } from 'lib/permissions/thread-permissions.js';
 import {
   generatePendingThreadColor,
   generateRandomColor,
@@ -27,10 +28,7 @@
 
 import createIDs from './id-creator.js';
 import createMessages from './message-creator.js';
-import {
-  createInitialRolesForNewThread,
-  getRolePermissionBlobs,
-} from './role-creator.js';
+import { createInitialRolesForNewThread } from './role-creator.js';
 import type { UpdatesForCurrentSession } from './update-creator.js';
 import { dbQuery, SQL } from '../database/database.js';
 import {
diff --git a/keyserver/src/updaters/role-updaters.js b/keyserver/src/updaters/role-updaters.js
--- a/keyserver/src/updaters/role-updaters.js
+++ b/keyserver/src/updaters/role-updaters.js
@@ -3,10 +3,10 @@
 import invariant from 'invariant';
 import _isEqual from 'lodash/fp/isEqual.js';
 
+import { getRolePermissionBlobs } from 'lib/permissions/thread-permissions.js';
 import type { ThreadType } from 'lib/types/thread-types.js';
 
 import createIDs from '../creators/id-creator.js';
-import { getRolePermissionBlobs } from '../creators/role-creator.js';
 import { dbQuery, SQL } from '../database/database.js';
 import { fetchRoles } from '../fetchers/role-fetchers.js';
 import type { Viewer } from '../session/viewer.js';
@@ -49,7 +49,9 @@
     const setAdminQuery = SQL`
       UPDATE memberships
       SET role = ${id}
-      WHERE thread = ${threadID} AND user = ${viewer.userID} AND role > 0
+      WHERE thread = ${threadID}
+        AND user = ${viewer.userID}
+        AND role > 0
     `;
     promises.push(dbQuery(setAdminQuery));
   } else if (!rolePermissions.Admins && currentRolePermissions.Admins) {
@@ -59,13 +61,17 @@
     );
     const id = currentRoleIDs.Admins;
     const deleteQuery = SQL`
-      DELETE r, i FROM roles r LEFT JOIN ids i ON i.id = r.id WHERE r.id = ${id}
+      DELETE r, i
+      FROM roles r
+      LEFT JOIN ids i ON i.id = r.id
+      WHERE r.id = ${id}
     `;
     promises.push(dbQuery(deleteQuery));
     const updateMembershipsQuery = SQL`
       UPDATE memberships
       SET role = ${currentRoleIDs.Members}
-      WHERE thread = ${threadID} AND role > 0
+      WHERE thread = ${threadID}
+        AND role > 0
     `;
     promises.push(dbQuery(updateMembershipsQuery));
   }
diff --git a/keyserver/src/updaters/thread-updaters.js b/keyserver/src/updaters/thread-updaters.js
--- a/keyserver/src/updaters/thread-updaters.js
+++ b/keyserver/src/updaters/thread-updaters.js
@@ -1,5 +1,6 @@
 // @flow
 
+import { getRolePermissionBlobs } from 'lib/permissions/thread-permissions.js';
 import { filteredThreadIDs } from 'lib/selectors/calendar-filter-selectors.js';
 import { getPinnedContentFromMessage } from 'lib/shared/message-utils.js';
 import {
@@ -41,7 +42,6 @@
   commitMembershipChangeset,
 } from './thread-permission-updaters.js';
 import createMessages from '../creators/message-creator.js';
-import { getRolePermissionBlobs } from '../creators/role-creator.js';
 import { createUpdates } from '../creators/update-creator.js';
 import { dbQuery, SQL } from '../database/database.js';
 import { fetchEntryInfos } from '../fetchers/entry-fetchers.js';
@@ -93,7 +93,8 @@
   const query = SQL`
     SELECT user, role
     FROM memberships
-    WHERE user IN (${memberIDs}) AND thread = ${request.threadID}
+    WHERE user IN (${memberIDs})
+      AND thread = ${request.threadID}
   `;
   const [result] = await dbQuery(query);
 
@@ -168,7 +169,8 @@
     SELECT m.user, m.role, t.default_role
     FROM memberships m
     LEFT JOIN threads t ON t.id = m.thread
-    WHERE m.user IN (${memberIDs}) AND m.thread = ${request.threadID}
+    WHERE m.user IN (${memberIDs})
+      AND m.thread = ${request.threadID}
   `;
   const [result] = await dbQuery(query);
 
@@ -951,8 +953,10 @@
 
   const togglePinQuery = SQL`
     UPDATE messages
-    SET pinned = ${pinnedValue}, pin_time = ${pinTimeValue}
-    WHERE id = ${messageID} AND thread = ${threadID}
+    SET pinned   = ${pinnedValue},
+        pin_time = ${pinTimeValue}
+    WHERE id = ${messageID}
+      AND thread = ${threadID}
   `;
 
   const messageData = {
diff --git a/lib/permissions/thread-permissions.js b/lib/permissions/thread-permissions.js
--- a/lib/permissions/thread-permissions.js
+++ b/lib/permissions/thread-permissions.js
@@ -13,6 +13,8 @@
   type ThreadPermissionsInfo,
   threadPermissions,
   threadPermissionPropagationPrefixes,
+  threadPermissionFilterPrefixes,
+  threadTypes,
 } from '../types/thread-types.js';
 
 function permissionLookup(
@@ -150,10 +152,262 @@
   }
 }
 
+type RolePermissionBlobs = {
+  +Members: ThreadRolePermissionsBlob,
+  +Admins?: ThreadRolePermissionsBlob,
+};
+
+const { CHILD, DESCENDANT } = threadPermissionPropagationPrefixes;
+const { OPEN, TOP_LEVEL, OPEN_TOP_LEVEL } = threadPermissionFilterPrefixes;
+const OPEN_CHILD = CHILD + OPEN;
+const OPEN_DESCENDANT = DESCENDANT + OPEN;
+const TOP_LEVEL_DESCENDANT = DESCENDANT + TOP_LEVEL;
+const OPEN_TOP_LEVEL_DESCENDANT = DESCENDANT + OPEN_TOP_LEVEL;
+
+const voicedPermissions = {
+  [threadPermissions.VOICED]: true,
+  [threadPermissions.EDIT_ENTRIES]: true,
+  [threadPermissions.EDIT_THREAD_NAME]: true,
+  [threadPermissions.EDIT_THREAD_COLOR]: true,
+  [threadPermissions.EDIT_THREAD_DESCRIPTION]: true,
+  [threadPermissions.EDIT_THREAD_AVATAR]: true,
+  [threadPermissions.CREATE_SUBCHANNELS]: true,
+  [threadPermissions.ADD_MEMBERS]: true,
+};
+
+function getRolePermissionBlobsForCommunity(
+  threadType: ThreadType,
+): RolePermissionBlobs {
+  const openDescendantKnowOf = OPEN_DESCENDANT + threadPermissions.KNOW_OF;
+  const openDescendantVisible = OPEN_DESCENDANT + threadPermissions.VISIBLE;
+  const openTopLevelDescendantJoinThread =
+    OPEN_TOP_LEVEL_DESCENDANT + threadPermissions.JOIN_THREAD;
+  const openChildJoinThread = OPEN_CHILD + threadPermissions.JOIN_THREAD;
+  const openChildAddMembers = OPEN_CHILD + threadPermissions.ADD_MEMBERS;
+
+  const genesisMemberPermissions = {
+    [threadPermissions.KNOW_OF]: true,
+    [threadPermissions.VISIBLE]: true,
+    [openDescendantKnowOf]: true,
+    [openDescendantVisible]: true,
+    [openTopLevelDescendantJoinThread]: true,
+  };
+  const baseMemberPermissions = {
+    ...genesisMemberPermissions,
+    [threadPermissions.REACT_TO_MESSAGE]: true,
+    [threadPermissions.EDIT_MESSAGE]: true,
+    [threadPermissions.LEAVE_THREAD]: true,
+    [threadPermissions.CREATE_SIDEBARS]: true,
+    [threadPermissions.ADD_MEMBERS]: true,
+    [openChildJoinThread]: true,
+    [openChildAddMembers]: true,
+  };
+
+  let memberPermissions;
+  if (threadType === threadTypes.COMMUNITY_ANNOUNCEMENT_ROOT) {
+    memberPermissions = baseMemberPermissions;
+  } else if (threadType === threadTypes.GENESIS) {
+    memberPermissions = genesisMemberPermissions;
+  } else {
+    memberPermissions = {
+      ...baseMemberPermissions,
+      ...voicedPermissions,
+    };
+  }
+
+  const descendantKnowOf = DESCENDANT + threadPermissions.KNOW_OF;
+  const descendantVisible = DESCENDANT + threadPermissions.VISIBLE;
+  const topLevelDescendantJoinThread =
+    TOP_LEVEL_DESCENDANT + threadPermissions.JOIN_THREAD;
+  const childJoinThread = CHILD + threadPermissions.JOIN_THREAD;
+  const descendantVoiced = DESCENDANT + threadPermissions.VOICED;
+  const descendantEditEntries = DESCENDANT + threadPermissions.EDIT_ENTRIES;
+  const descendantEditThreadName =
+    DESCENDANT + threadPermissions.EDIT_THREAD_NAME;
+  const descendantEditThreadColor =
+    DESCENDANT + threadPermissions.EDIT_THREAD_COLOR;
+  const descendantEditThreadDescription =
+    DESCENDANT + threadPermissions.EDIT_THREAD_DESCRIPTION;
+  const descendantEditThreadAvatar =
+    DESCENDANT + threadPermissions.EDIT_THREAD_AVATAR;
+  const topLevelDescendantCreateSubchannels =
+    TOP_LEVEL_DESCENDANT + threadPermissions.CREATE_SUBCHANNELS;
+  const topLevelDescendantCreateSidebars =
+    TOP_LEVEL_DESCENDANT + threadPermissions.CREATE_SIDEBARS;
+  const descendantAddMembers = DESCENDANT + threadPermissions.ADD_MEMBERS;
+  const descendantDeleteThread = DESCENDANT + threadPermissions.DELETE_THREAD;
+  const descendantEditPermissions =
+    DESCENDANT + threadPermissions.EDIT_PERMISSIONS;
+  const descendantRemoveMembers = DESCENDANT + threadPermissions.REMOVE_MEMBERS;
+  const descendantChangeRole = DESCENDANT + threadPermissions.CHANGE_ROLE;
+  const descendantManagePins = DESCENDANT + threadPermissions.MANAGE_PINS;
+
+  const baseAdminPermissions = {
+    [threadPermissions.KNOW_OF]: true,
+    [threadPermissions.VISIBLE]: true,
+    [threadPermissions.VOICED]: true,
+    [threadPermissions.REACT_TO_MESSAGE]: true,
+    [threadPermissions.EDIT_MESSAGE]: true,
+    [threadPermissions.EDIT_ENTRIES]: true,
+    [threadPermissions.EDIT_THREAD_NAME]: true,
+    [threadPermissions.EDIT_THREAD_COLOR]: true,
+    [threadPermissions.EDIT_THREAD_DESCRIPTION]: true,
+    [threadPermissions.EDIT_THREAD_AVATAR]: true,
+    [threadPermissions.CREATE_SUBCHANNELS]: true,
+    [threadPermissions.CREATE_SIDEBARS]: true,
+    [threadPermissions.ADD_MEMBERS]: true,
+    [threadPermissions.DELETE_THREAD]: true,
+    [threadPermissions.REMOVE_MEMBERS]: true,
+    [threadPermissions.CHANGE_ROLE]: true,
+    [threadPermissions.MANAGE_PINS]: true,
+    [descendantKnowOf]: true,
+    [descendantVisible]: true,
+    [topLevelDescendantJoinThread]: true,
+    [childJoinThread]: true,
+    [descendantVoiced]: true,
+    [descendantEditEntries]: true,
+    [descendantEditThreadName]: true,
+    [descendantEditThreadColor]: true,
+    [descendantEditThreadDescription]: true,
+    [descendantEditThreadAvatar]: true,
+    [topLevelDescendantCreateSubchannels]: true,
+    [topLevelDescendantCreateSidebars]: true,
+    [descendantAddMembers]: true,
+    [descendantDeleteThread]: true,
+    [descendantEditPermissions]: true,
+    [descendantRemoveMembers]: true,
+    [descendantChangeRole]: true,
+    [descendantManagePins]: true,
+  };
+
+  let adminPermissions;
+  if (threadType === threadTypes.GENESIS) {
+    adminPermissions = baseAdminPermissions;
+  } else {
+    adminPermissions = {
+      ...baseAdminPermissions,
+      [threadPermissions.LEAVE_THREAD]: true,
+    };
+  }
+
+  return {
+    Members: memberPermissions,
+    Admins: adminPermissions,
+  };
+}
+
+function getRolePermissionBlobs(threadType: ThreadType): RolePermissionBlobs {
+  if (threadType === threadTypes.SIDEBAR) {
+    const memberPermissions = {
+      [threadPermissions.VOICED]: true,
+      [threadPermissions.REACT_TO_MESSAGE]: true,
+      [threadPermissions.EDIT_MESSAGE]: true,
+      [threadPermissions.EDIT_THREAD_NAME]: true,
+      [threadPermissions.EDIT_THREAD_COLOR]: true,
+      [threadPermissions.EDIT_THREAD_DESCRIPTION]: true,
+      [threadPermissions.EDIT_THREAD_AVATAR]: true,
+      [threadPermissions.ADD_MEMBERS]: true,
+      [threadPermissions.EDIT_PERMISSIONS]: true,
+      [threadPermissions.REMOVE_MEMBERS]: true,
+      [threadPermissions.LEAVE_THREAD]: true,
+    };
+    return {
+      Members: memberPermissions,
+    };
+  }
+
+  const openDescendantKnowOf = OPEN_DESCENDANT + threadPermissions.KNOW_OF;
+  const openDescendantVisible = OPEN_DESCENDANT + threadPermissions.VISIBLE;
+  const openChildJoinThread = OPEN_CHILD + threadPermissions.JOIN_THREAD;
+
+  if (threadType === threadTypes.PRIVATE) {
+    const memberPermissions = {
+      [threadPermissions.KNOW_OF]: true,
+      [threadPermissions.VISIBLE]: true,
+      [threadPermissions.VOICED]: true,
+      [threadPermissions.REACT_TO_MESSAGE]: true,
+      [threadPermissions.EDIT_MESSAGE]: true,
+      [threadPermissions.EDIT_THREAD_COLOR]: true,
+      [threadPermissions.EDIT_THREAD_DESCRIPTION]: true,
+      [threadPermissions.CREATE_SIDEBARS]: true,
+      [threadPermissions.EDIT_ENTRIES]: true,
+      [openDescendantKnowOf]: true,
+      [openDescendantVisible]: true,
+      [openChildJoinThread]: true,
+    };
+    return {
+      Members: memberPermissions,
+    };
+  }
+
+  if (threadType === threadTypes.PERSONAL) {
+    return {
+      Members: {
+        [threadPermissions.KNOW_OF]: true,
+        [threadPermissions.VISIBLE]: true,
+        [threadPermissions.VOICED]: true,
+        [threadPermissions.REACT_TO_MESSAGE]: true,
+        [threadPermissions.EDIT_MESSAGE]: true,
+        [threadPermissions.EDIT_ENTRIES]: true,
+        [threadPermissions.EDIT_THREAD_NAME]: true,
+        [threadPermissions.EDIT_THREAD_COLOR]: true,
+        [threadPermissions.EDIT_THREAD_DESCRIPTION]: true,
+        [threadPermissions.CREATE_SIDEBARS]: true,
+        [openDescendantKnowOf]: true,
+        [openDescendantVisible]: true,
+        [openChildJoinThread]: true,
+      },
+    };
+  }
+
+  const openTopLevelDescendantJoinThread =
+    OPEN_TOP_LEVEL_DESCENDANT + threadPermissions.JOIN_THREAD;
+
+  const subthreadBasePermissions = {
+    [threadPermissions.KNOW_OF]: true,
+    [threadPermissions.VISIBLE]: true,
+    [threadPermissions.REACT_TO_MESSAGE]: true,
+    [threadPermissions.EDIT_MESSAGE]: true,
+    [threadPermissions.CREATE_SIDEBARS]: true,
+    [threadPermissions.LEAVE_THREAD]: true,
+    [openDescendantKnowOf]: true,
+    [openDescendantVisible]: true,
+    [openTopLevelDescendantJoinThread]: true,
+    [openChildJoinThread]: true,
+  };
+
+  if (
+    threadType === threadTypes.COMMUNITY_OPEN_SUBTHREAD ||
+    threadType === threadTypes.COMMUNITY_SECRET_SUBTHREAD
+  ) {
+    const memberPermissions = {
+      [threadPermissions.REMOVE_MEMBERS]: true,
+      [threadPermissions.EDIT_PERMISSIONS]: true,
+      ...subthreadBasePermissions,
+      ...voicedPermissions,
+    };
+    return {
+      Members: memberPermissions,
+    };
+  }
+
+  if (
+    threadType === threadTypes.COMMUNITY_OPEN_ANNOUNCEMENT_SUBTHREAD ||
+    threadType === threadTypes.COMMUNITY_SECRET_ANNOUNCEMENT_SUBTHREAD
+  ) {
+    return {
+      Members: subthreadBasePermissions,
+    };
+  }
+
+  return getRolePermissionBlobsForCommunity(threadType);
+}
+
 export {
   permissionLookup,
   getAllThreadPermissions,
   makePermissionsBlob,
   makePermissionsForChildrenBlob,
   getRoleForPermissions,
+  getRolePermissionBlobs,
 };