Disambiguate between types of receipts when stored in the same map

ts/messageModifiers/generateCacheKey.ts

@@ -1,16 +1,24 @@
 // Copyright 2016 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
+import type { MessageReceiptType } from './MessageReceipts';
+
 // This function is necessary because the only thing we can guarantee will be unique is
 //  three pieces of data: sender, deviceId, and timestamp.
 // Because we don't care which device interacted with our message, we collapse this down
 //  to: sender + timestamp.
+// In some cases, modifiers are stored in the same map, so we also add the modifier type
+
+type ModifierType = MessageReceiptType | 'readsync' | 'viewsync';
+
 export function generateCacheKey({
   sender,
   timestamp,
+  type,
 }: {
   sender: string;
   timestamp: number;
+  type: ModifierType;
 }): string {
-  return `cacheKey-${sender}-${timestamp}`;
+  return `cacheKey-${sender}-${timestamp}-${type}`;
 }