From 15f1a22f2e2bd7e01ac72908a5db860cd8cacbbc Mon Sep 17 00:00:00 2001
From: Danish Arora <danisharora099@gmail.com>
Date: Thu, 20 Nov 2025 16:26:27 -0500
Subject: [PATCH] feat: remove `storageKeyPrefix` and
 `getDefaultHistoryStorage`, simplifying history storage initialization to
 default to `localStorage`

---
 .../src/message_channel/persistent_history.ts | 20 ++-----------------
 1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/packages/sds/src/message_channel/persistent_history.ts b/packages/sds/src/message_channel/persistent_history.ts
index d9de3e592b..d68cae183e 100644
--- a/packages/sds/src/message_channel/persistent_history.ts
+++ b/packages/sds/src/message_channel/persistent_history.ts
@@ -12,7 +12,6 @@ export interface HistoryStorage {
 export interface PersistentHistoryOptions {
   channelId: ChannelId;
   storage?: HistoryStorage;
-  storageKeyPrefix?: string;
 }
 
 type StoredHistoryEntry = {
@@ -45,8 +44,8 @@ export class PersistentHistory implements ILocalHistory {
 
   public constructor(options: PersistentHistoryOptions) {
     this.memory = new MemLocalHistory();
-    this.storage = options.storage ?? getDefaultHistoryStorage();
-    this.storageKey = `${HISTORY_STORAGE_PREFIX}${options.storageKeyPrefix}:${options.channelId}`;
+    this.storage = options.storage || localStorage;
+    this.storageKey = `${HISTORY_STORAGE_PREFIX}${options.channelId}`;
     this.load();
   }
 
@@ -132,21 +131,6 @@ export class PersistentHistory implements ILocalHistory {
   }
 }
 
-export const getDefaultHistoryStorage = (): HistoryStorage | undefined => {
-  try {
-    if (typeof localStorage === "undefined") {
-      return undefined;
-    }
-
-    const probeKey = `${HISTORY_STORAGE_PREFIX}__probe__`;
-    localStorage.setItem(probeKey, probeKey);
-    localStorage.removeItem(probeKey);
-    return localStorage;
-  } catch {
-    return undefined;
-  }
-};
-
 const serializeHistoryEntry = (entry: HistoryEntry): StoredHistoryEntry => ({
   messageId: entry.messageId,
   retrievalHint: entry.retrievalHint