Implement InitializeAuth changes for BYO-CIAM Firebase Auth

Author: mansisampat

common/api-review/auth.api.md

@@ -316,6 +316,7 @@ export interface Dependencies {
     errorMap?: AuthErrorMap;
     persistence?: Persistence | Persistence[];
     popupRedirectResolver?: PopupRedirectResolver;
+    tenantConfig?: TenantConfig;
 }
 
 // @public
@@ -795,6 +796,12 @@ export function signInWithRedirect(auth: Auth, provider: AuthProvider, resolver?
 // @public
 export function signOut(auth: Auth): Promise<void>;
 
+// @public
+export interface TenantConfig {
+    location?: string;
+    tenantId?: string;
+}
+
 // @public
 export interface TotpMultiFactorAssertion extends MultiFactorAssertion {
 }

docs-devsite/_toc.yaml

@@ -155,6 +155,8 @@ toc:
     path: /docs/reference/js/auth.recaptchaverifier.md
   - title: SAMLAuthProvider
     path: /docs/reference/js/auth.samlauthprovider.md
+  - title: TenantConfig
+    path: /docs/reference/js/auth.tenantconfig.md
   - title: TotpMultiFactorAssertion
     path: /docs/reference/js/auth.totpmultifactorassertion.md
   - title: TotpMultiFactorGenerator

docs-devsite/auth.dependencies.md

@@ -29,6 +29,7 @@ export interface Dependencies
 |  [errorMap](./auth.dependencies.md#dependencieserrormap) | [AuthErrorMap](./auth.autherrormap.md#autherrormap_interface) | Which [AuthErrorMap](./auth.autherrormap.md#autherrormap_interface) to use. |
 |  [persistence](./auth.dependencies.md#dependenciespersistence) | [Persistence](./auth.persistence.md#persistence_interface) \| [Persistence](./auth.persistence.md#persistence_interface)<!-- -->\[\] | Which [Persistence](./auth.persistence.md#persistence_interface) to use. If this is an array, the first <code>Persistence</code> that the device supports is used. The SDK searches for an existing account in order and, if one is found in a secondary <code>Persistence</code>, the account is moved to the primary <code>Persistence</code>.<!-- -->If no persistence is provided, the SDK falls back on [inMemoryPersistence](./auth.md#inmemorypersistence)<!-- -->. |
 |  [popupRedirectResolver](./auth.dependencies.md#dependenciespopupredirectresolver) | [PopupRedirectResolver](./auth.popupredirectresolver.md#popupredirectresolver_interface) | The [PopupRedirectResolver](./auth.popupredirectresolver.md#popupredirectresolver_interface) to use. This value depends on the platform. Options are [browserPopupRedirectResolver](./auth.md#browserpopupredirectresolver) and [cordovaPopupRedirectResolver](./auth.md#cordovapopupredirectresolver)<!-- -->. This field is optional if neither [signInWithPopup()](./auth.md#signinwithpopup_770f816) or [signInWithRedirect()](./auth.md#signinwithredirect_770f816) are being used. |
+|  [tenantConfig](./auth.dependencies.md#dependenciestenantconfig) | [TenantConfig](./auth.tenantconfig.md#tenantconfig_interface) | The [TenantConfig](./auth.tenantconfig.md#tenantconfig_interface) to use. This field is optional and required if Regional Auth Instance needs to be configured. The Auth instance depends on the  endpoint. |
 
 ## Dependencies.errorMap
 
@@ -61,3 +62,13 @@ The [PopupRedirectResolver](./auth.popupredirectresolver.md#popupredirectresolve
 ```typescript
 popupRedirectResolver?: PopupRedirectResolver;
 ```
+
+## Dependencies.tenantConfig
+
+The [TenantConfig](./auth.tenantconfig.md#tenantconfig_interface) to use. This field is optional and required if Regional Auth Instance needs to be configured. The Auth instance depends on the  endpoint.
+
+<b>Signature:</b>
+
+```typescript
+tenantConfig?: TenantConfig;
+```

docs-devsite/auth.md

@@ -137,6 +137,7 @@ Firebase Authentication
 |  [PopupRedirectResolver](./auth.popupredirectresolver.md#popupredirectresolver_interface) | A resolver used for handling DOM specific operations like [signInWithPopup()](./auth.md#signinwithpopup_770f816) or [signInWithRedirect()](./auth.md#signinwithredirect_770f816)<!-- -->. |
 |  [ReactNativeAsyncStorage](./auth.reactnativeasyncstorage.md#reactnativeasyncstorage_interface) | Interface for a supplied <code>AsyncStorage</code>. |
 |  [RecaptchaParameters](./auth.recaptchaparameters.md#recaptchaparameters_interface) | Interface representing reCAPTCHA parameters.<!-- -->See the [reCAPTCHA docs](https://developers.google.com/recaptcha/docs/display#render_param) for the list of accepted parameters. All parameters are accepted except for <code>sitekey</code>: Firebase Auth provisions a reCAPTCHA for each project and will configure the site key upon rendering.<!-- -->For an invisible reCAPTCHA, set the <code>size</code> key to <code>invisible</code>. |
+|  [TenantConfig](./auth.tenantconfig.md#tenantconfig_interface) | The tenant config that can be used to initialize a Regional [Auth](./auth.auth.md#auth_interface) instance. |
 |  [TotpMultiFactorAssertion](./auth.totpmultifactorassertion.md#totpmultifactorassertion_interface) | The class for asserting ownership of a TOTP second factor. Provided by [TotpMultiFactorGenerator.assertionForEnrollment()](./auth.totpmultifactorgenerator.md#totpmultifactorgeneratorassertionforenrollment) and [TotpMultiFactorGenerator.assertionForSignIn()](./auth.totpmultifactorgenerator.md#totpmultifactorgeneratorassertionforsignin)<!-- -->. |
 |  [TotpMultiFactorInfo](./auth.totpmultifactorinfo.md#totpmultifactorinfo_interface) | The subclass of the [MultiFactorInfo](./auth.multifactorinfo.md#multifactorinfo_interface) interface for TOTP second factors. The <code>factorId</code> of this second factor is [FactorId](./auth.md#factorid)<!-- -->.TOTP. |
 |  [User](./auth.user.md#user_interface) | A user account. |

docs-devsite/auth.tenantconfig.md

@@ -0,0 +1,46 @@
+Project: /docs/reference/js/_project.yaml
+Book: /docs/reference/_book.yaml
+page_type: reference
+
+{% comment %}
+DO NOT EDIT THIS FILE!
+This is generated by the JS SDK team, and any local changes will be
+overwritten. Changes should be made in the source code at
+https://github.com/firebase/firebase-js-sdk
+{% endcomment %}
+
+# TenantConfig interface
+The tenant config that can be used to initialize a Regional [Auth](./auth.auth.md#auth_interface) instance.
+
+<b>Signature:</b>
+
+```typescript
+export interface TenantConfig 
+```
+
+## Properties
+
+|  Property | Type | Description |
+|  --- | --- | --- |
+|  [location](./auth.tenantconfig.md#tenantconfiglocation) | string | Which location to use. |
+|  [tenantId](./auth.tenantconfig.md#tenantconfigtenantid) | string | The tenant Id being used. |
+
+## TenantConfig.location
+
+Which location to use.
+
+<b>Signature:</b>
+
+```typescript
+location?: string;
+```
+
+## TenantConfig.tenantId
+
+The tenant Id being used.
+
+<b>Signature:</b>
+
+```typescript
+tenantId?: string;
+```

packages/auth/src/core/auth/auth_impl.ts

@@ -91,7 +91,8 @@ interface AsyncAction {
 export const enum DefaultConfig {
   TOKEN_API_HOST = 'securetoken.googleapis.com',
   API_HOST = 'identitytoolkit.googleapis.com',
-  API_SCHEME = 'https'
+  API_SCHEME = 'https',
+  REGIONAL_API_HOST = 'identityplatform.googleapis.com'
 }
 
 export class AuthImpl implements AuthInternal, _FirebaseService {

packages/auth/src/core/auth/register.ts

@@ -68,6 +68,7 @@ export function registerAuth(clientPlatform: ClientPlatform): void {
         const appCheckServiceProvider =
           container.getProvider<'app-check-internal'>('app-check-internal');
         const { apiKey, authDomain } = app.options;
+        const tenantConfig = deps?.tenantConfig;
 
         _assert(
           apiKey && !apiKey.includes(':'),
@@ -79,7 +80,9 @@ export function registerAuth(clientPlatform: ClientPlatform): void {
           apiKey,
           authDomain,
           clientPlatform,
-          apiHost: DefaultConfig.API_HOST,
+          apiHost: tenantConfig?.location
+            ? DefaultConfig.REGIONAL_API_HOST
+            : DefaultConfig.API_HOST,
           tokenApiHost: DefaultConfig.TOKEN_API_HOST,
           apiScheme: DefaultConfig.API_SCHEME,
           sdkClientVersion: _getClientVersion(clientPlatform)

packages/auth/src/model/public_types.ts

@@ -1260,6 +1260,28 @@ export interface Dependencies {
    * Which {@link AuthErrorMap} to use.
    */
   errorMap?: AuthErrorMap;
+  /**
+   * The {@link TenantConfig} to use. This field is optional and required
+   * if Regional Auth Instance needs to be configured. The Auth instance depends
+   * on the {@link DefaultConfig.REGIONAL_API_HOST} endpoint.
+   */
+  tenantConfig?: TenantConfig;
+}
+
+/**
+ * The tenant config that can be used to initialize a Regional {@link Auth} instance.
+ * 
+ * @public
+ */
+export interface TenantConfig {
+  /**
+   * Which location to use.
+   */
+  location?: string;
+  /**
+   * The tenant Id being used.
+   */
+  tenantId?: string;
 }
 
 /**