diff --git a/lib/permissions/farcaster-permissions.js b/lib/permissions/farcaster-permissions.js
--- a/lib/permissions/farcaster-permissions.js
+++ b/lib/permissions/farcaster-permissions.js
@@ -3,18 +3,35 @@
 import type { RolePermissionBlobs } from './thread-permissions.js';
 import type { FarcasterConversation } from '../shared/farcaster/farcaster-conversation-types.js';
 import { threadPermissions } from '../types/thread-permission-types.js';
+import type { FarcasterThreadType } from '../types/thread-types-enum.js';
+import { farcasterThreadTypes } from '../types/thread-types-enum.js';
 
-function getFarcasterRolePermissionsBlobs(
+function getFarcasterRolePermissionsBlobsFromConversation(
   conversation: FarcasterConversation,
 ): RolePermissionBlobs {
-  if (conversation.isGroup) {
+  const threadType = conversation.isGroup
+    ? farcasterThreadTypes.FARCASTER_GROUP
+    : farcasterThreadTypes.FARCASTER_PERSONAL;
+  return getFarcasterRolePermissionsBlobs(
+    threadType,
+    conversation.groupPreferences?.onlyAdminsCanWrite,
+    conversation.groupPreferences?.membersCanInvite,
+  );
+}
+
+function getFarcasterRolePermissionsBlobs(
+  threadType: FarcasterThreadType,
+  onlyAdminsCanWrite: boolean = false,
+  membersCanInvite: boolean = true,
+): RolePermissionBlobs {
+  if (threadType === farcasterThreadTypes.FARCASTER_GROUP) {
     // These permissions are based on the experimentation:
     // Only admins can create invite links
     // Admins can decide who can add users (admins or all the members)
     // Admins can change a role of a user
     // Only admins can edit a thread
     let membersPermissions;
-    if (conversation.groupPreferences?.onlyAdminsCanWrite) {
+    if (onlyAdminsCanWrite) {
       membersPermissions = {
         [threadPermissions.KNOW_OF]: true,
         [threadPermissions.VISIBLE]: true,
@@ -29,8 +46,7 @@
         [threadPermissions.REACT_TO_MESSAGE]: true,
         [threadPermissions.EDIT_MESSAGE]: true,
         [threadPermissions.DELETE_OWN_MESSAGES]: true,
-        [threadPermissions.ADD_MEMBERS]:
-          !!conversation.groupPreferences?.membersCanInvite,
+        [threadPermissions.ADD_MEMBERS]: membersCanInvite,
         [threadPermissions.LEAVE_THREAD]: true,
       };
     }
@@ -74,4 +90,7 @@
   }
 }
 
-export { getFarcasterRolePermissionsBlobs };
+export {
+  getFarcasterRolePermissionsBlobsFromConversation,
+  getFarcasterRolePermissionsBlobs,
+};
diff --git a/lib/shared/threads/protocols/farcaster-thread-protocol.js b/lib/shared/threads/protocols/farcaster-thread-protocol.js
--- a/lib/shared/threads/protocols/farcaster-thread-protocol.js
+++ b/lib/shared/threads/protocols/farcaster-thread-protocol.js
@@ -1,5 +1,6 @@
 // @flow
 
+import { getFarcasterRolePermissionsBlobs } from '../../../permissions/farcaster-permissions.js';
 import type { RolePermissionBlobs } from '../../../permissions/thread-permissions.js';
 import type { SetThreadUnreadStatusPayload } from '../../../types/activity-types.js';
 import type {
@@ -17,6 +18,7 @@
 } from '../../../types/minimally-encoded-thread-permissions-types.js';
 import type { SubscriptionUpdateResult } from '../../../types/subscription-types.js';
 import type { ThreadType } from '../../../types/thread-types-enum.js';
+import { assertFarcasterThreadType } from '../../../types/thread-types-enum.js';
 import type {
   ChangeThreadSettingsPayload,
   ThreadJoinPayload,
@@ -115,8 +117,9 @@
     );
   },
 
-  getRolePermissionBlobs: (): RolePermissionBlobs => {
-    throw new Error('getRolePermissionBlobs method is not yet implemented');
+  getRolePermissionBlobs: (threadType: ThreadType): RolePermissionBlobs => {
+    const farcasterThreadType = assertFarcasterThreadType(threadType);
+    return getFarcasterRolePermissionsBlobs(farcasterThreadType);
   },
 
   deleteMessage: async (): Promise<void> => {
diff --git a/lib/utils/farcaster-utils.js b/lib/utils/farcaster-utils.js
--- a/lib/utils/farcaster-utils.js
+++ b/lib/utils/farcaster-utils.js
@@ -10,7 +10,7 @@
 import { farcasterIDPrefix } from './validation-utils.js';
 import { setSyncedMetadataEntryActionType } from '../actions/synced-metadata-actions.js';
 import { useUserIdentityCache } from '../components/user-identity-cache.react.js';
-import { getFarcasterRolePermissionsBlobs } from '../permissions/farcaster-permissions.js';
+import { getFarcasterRolePermissionsBlobsFromConversation } from '../permissions/farcaster-permissions.js';
 import { specialRoles } from '../permissions/special-roles.js';
 import {
   getAllThreadPermissions,
@@ -288,7 +288,8 @@
   const threadType = conversation.isGroup
     ? farcasterThreadTypes.FARCASTER_GROUP
     : farcasterThreadTypes.FARCASTER_PERSONAL;
-  const permissionBlobs = getFarcasterRolePermissionsBlobs(conversation);
+  const permissionBlobs =
+    getFarcasterRolePermissionsBlobsFromConversation(conversation);
 
   const membersRole: RoleInfo = {
     ...minimallyEncodeRoleInfo({