/**
 * @license
 * Copyright 2024 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { DataConnectOptions, TransportOptions } from '../../api/DataConnect';
import { AppCheckTokenProvider } from '../../core/AppCheckTokenProvider';
import { AuthTokenProvider } from '../../core/FirebaseAuthProvider';
/**
 * @internal
 */
export interface DataConnectTransport {
    invokeQuery<T, U>(queryName: string, body?: U): PromiseLike<{
        data: T;
        errors: Error[];
    }>;
    invokeMutation<T, U>(queryName: string, body?: U): PromiseLike<{
        data: T;
        errors: Error[];
    }>;
    useEmulator(host: string, port?: number, sslEnabled?: boolean): void;
    onTokenChanged: (token: string | null) => void;
}
export interface CancellableOperation<T> extends PromiseLike<{
    data: T;
}> {
    cancel: () => void;
}
/**
 * @internal
 */
export declare type TransportClass = new (options: DataConnectOptions, apiKey?: string, appId?: string, authProvider?: AuthTokenProvider, appCheckProvider?: AppCheckTokenProvider, transportOptions?: TransportOptions, _isUsingGen?: boolean) => DataConnectTransport;