import type { FirebaseConfig } from './firebase-types.js';
import { FirebaseEdgeError } from './errors.js';
/**
 * Firebase Client Authentication handler for edge environments.
 * Provides client-side authentication operations using Firebase API.
 */
export declare class FirebaseAuth {
    private firebase_config;
    private requestUri;
    private tenantId?;
    private fetch?;
    /**
     * Creates a new Firebase Auth instance.
     *
     * @param firebase_config Firebase client configuration
     * @param requestUri OAuth callback URI
     * @param tenantId Optional tenant ID for multi-tenancy
     * @param fetch Optional custom fetch implementation
     */
    constructor(firebase_config: FirebaseConfig, requestUri: string, tenantId?: string | undefined, fetch?: typeof globalThis.fetch | undefined);
    /**
     * Signs in a user with an OAuth provider token.
     *
     * @param oauthToken OAuth access token or ID token from the provider
     * @param providerId OAuth provider ID (defaults to 'google.com')
     * @returns Promise with object containing sign-in data or null, and error if any
     */
    signInWithProvider(oauthToken: string, providerId?: string): Promise<{
        data: null;
        error: FirebaseEdgeError;
    } | {
        data: import("./firebase-types.js").FirebaseIdpSignInResponse;
        error: null;
    }>;
    /**
     * Signs in a user with a custom Firebase authentication token.
     *
     * @param customToken Custom authentication token created by Firebase Admin SDK
     * @returns Promise with object containing sign-in data (idToken, refreshToken, expiresIn) or null, and error if any
     */
    signInWithCustomToken(customToken: string): Promise<{
        data: null;
        error: FirebaseEdgeError;
    } | {
        data: import("./firebase-types.js").FirebaseIdpSignInResponse;
        error: null;
    }>;
    /**
     * Links an OAuth credential to an existing user account.
     *
     * @param idToken Firebase ID token of the user to link
     * @param providerToken OAuth token from the provider to link
     * @param providerId OAuth provider ID (defaults to 'google.com')
     * @returns Promise with object containing linked account data or null, and error if any
     */
    linkWithCredential(idToken: string, providerToken: string, providerId?: string): Promise<{
        data: null;
        error: FirebaseEdgeError;
    } | {
        data: import("./firebase-types.js").FirebaseIdpSignInResponse;
        error: null;
    }>;
}
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