/**
 * (C) Copyright IBM Corp. 2019, 2022.
 *
 * 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.
 */
/// <reference types="node" />
import { OutgoingHttpHeaders } from 'http';
/**
 * The request object containing the headers property that
 * authentication information will be added to.
 */
export interface AuthenticateOptions {
    /**
     * Headers to augment with authentication information.
     */
    headers?: OutgoingHttpHeaders;
    [propName: string]: any;
}
/**
 * This interface defines the common methods associated with an Authenticator
 * implementation.
 */
export interface AuthenticatorInterface {
    /**
     * Add authentication information to the specified request.
     *
     * @param requestOptions - The request to which authentication information is added
     * (in the headers field).
     */
    authenticate(requestOptions: AuthenticateOptions): Promise<void>;
    /**
     * Returns a string that indicates the authentication type.
     */
    authenticationType(): string;
}