Fix throttling for App Check to prevent unnecessary requests to backend (#6439)

* Switch check for FirebaseError code to use includes

* Add changeset

* Update changeset to a patch

* Remove debugging console.log

Author: dwyfrequency

.changeset/cyan-sheep-battle.md

@@ -0,0 +1,5 @@
+---
+'@firebase/app-check': patch
+---
+
+Fix logic to trigger app check throttling

packages/app-check/src/internal-api.test.ts

@@ -41,11 +41,11 @@ import * as util from './util';
 import { logger } from './logger';
 import { getState, clearState, setState, getDebugState } from './state';
 import { AppCheckTokenListener } from './public-types';
-import { Deferred, FirebaseError } from '@firebase/util';
+import { Deferred } from '@firebase/util';
 import { ReCaptchaEnterpriseProvider, ReCaptchaV3Provider } from './providers';
 import { AppCheckService } from './factory';
 import { ListenerType } from './types';
-import { AppCheckError } from './errors';
+import { AppCheckError, ERROR_FACTORY } from './errors';
 
 const fakeRecaptchaToken = 'fake-recaptcha-token';
 const fakeRecaptchaAppCheckToken = {
@@ -396,11 +396,9 @@ describe('internal api', () => {
       const warnStub = stub(logger, 'warn');
       stub(client, 'exchangeToken').returns(
         Promise.reject(
-          new FirebaseError(
-            AppCheckError.FETCH_STATUS_ERROR,
-            'test error msg',
-            { httpStatus: 503 }
-          )
+          ERROR_FACTORY.create(AppCheckError.FETCH_STATUS_ERROR, {
+            httpStatus: 503
+          })
         )
       );
 
@@ -424,11 +422,9 @@ describe('internal api', () => {
       const warnStub = stub(logger, 'warn');
       stub(client, 'exchangeToken').returns(
         Promise.reject(
-          new FirebaseError(
-            AppCheckError.FETCH_STATUS_ERROR,
-            'test error msg',
-            { httpStatus: 403 }
-          )
+          ERROR_FACTORY.create(AppCheckError.FETCH_STATUS_ERROR, {
+            httpStatus: 403
+          })
         )
       );
 

packages/app-check/src/providers.ts

@@ -80,7 +80,9 @@ export class ReCaptchaV3Provider implements AppCheckProvider {
         this._heartbeatServiceProvider!
       );
     } catch (e) {
-      if ((e as FirebaseError).code === AppCheckError.FETCH_STATUS_ERROR) {
+      if (
+        (e as FirebaseError).code?.includes(AppCheckError.FETCH_STATUS_ERROR)
+      ) {
         this._throttleData = setBackoff(
           Number((e as FirebaseError).customData?.httpStatus),
           this._throttleData
@@ -167,7 +169,9 @@ export class ReCaptchaEnterpriseProvider implements AppCheckProvider {
         this._heartbeatServiceProvider!
       );
     } catch (e) {
-      if ((e as FirebaseError).code === AppCheckError.FETCH_STATUS_ERROR) {
+      if (
+        (e as FirebaseError).code?.includes(AppCheckError.FETCH_STATUS_ERROR)
+      ) {
         this._throttleData = setBackoff(
           Number((e as FirebaseError).customData?.httpStatus),
           this._throttleData