From 0960fdde3b302b19dc7390d20ae63211d81feebb Mon Sep 17 00:00:00 2001
From: Hui Zhao <zhohz@amazon.com>
Date: Tue, 31 Oct 2023 11:21:57 -0700
Subject: [PATCH] fix(core): remove used symbol and remove usage of Symbol.for

---
 packages/core/src/Hub/index.ts    |  4 ++--
 packages/core/src/constants.ts    | 11 -----------
 packages/core/src/libraryUtils.ts |  5 +----
 3 files changed, 3 insertions(+), 17 deletions(-)

diff --git a/packages/core/src/Hub/index.ts b/packages/core/src/Hub/index.ts
index d226a9f1b78..6f6cb907140 100644
--- a/packages/core/src/Hub/index.ts
+++ b/packages/core/src/Hub/index.ts
@@ -16,8 +16,8 @@ import {
 } from './types';
 
 export const AMPLIFY_SYMBOL = (
-	typeof Symbol !== 'undefined' && typeof Symbol.for === 'function'
-		? Symbol.for('amplify_default')
+	typeof Symbol !== 'undefined'
+		? Symbol('amplify_default')
 		: '@@amplify_default'
 ) as Symbol;
 
diff --git a/packages/core/src/constants.ts b/packages/core/src/constants.ts
index 3a202d31da4..82e84497f40 100644
--- a/packages/core/src/constants.ts
+++ b/packages/core/src/constants.ts
@@ -4,17 +4,6 @@
 // Logging constants
 export const AWS_CLOUDWATCH_CATEGORY = 'Logging';
 
-/**
- * This Symbol is used to reference an internal-only PubSub provider that
- * is used for AppSync/GraphQL subscriptions in the API category.
- */
-const hasSymbol =
-	typeof Symbol !== 'undefined' && typeof Symbol.for === 'function';
-
-export const INTERNAL_AWS_APPSYNC_REALTIME_PUBSUB_PROVIDER = hasSymbol
-	? Symbol.for('INTERNAL_AWS_APPSYNC_REALTIME_PUBSUB_PROVIDER')
-	: '@@INTERNAL_AWS_APPSYNC_REALTIME_PUBSUB_PROVIDER';
-
 export const USER_AGENT_HEADER = 'x-amz-user-agent';
 
 // Error exception code constants
diff --git a/packages/core/src/libraryUtils.ts b/packages/core/src/libraryUtils.ts
index 0eed9202d67..bbaa20143fe 100644
--- a/packages/core/src/libraryUtils.ts
+++ b/packages/core/src/libraryUtils.ts
@@ -90,10 +90,7 @@ export {
 export { BackgroundProcessManager } from './BackgroundProcessManager';
 export { Mutex } from './Mutex';
 export { Reachability } from './Reachability';
-export {
-	INTERNAL_AWS_APPSYNC_REALTIME_PUBSUB_PROVIDER,
-	USER_AGENT_HEADER,
-} from './constants';
+export { USER_AGENT_HEADER } from './constants';
 export { fetchAuthSession } from './singleton/apis/internal/fetchAuthSession';
 export { AMPLIFY_SYMBOL } from './Hub';
 export { base64Decoder, base64Encoder } from './utils/convert';