/**
 * (C) Copyright IBM Corp. 2024.
 *
 * 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 { IamRequestBasedTokenManager } from '../token-managers/iam-request-based-token-manager';
import { BaseOptions, TokenRequestBasedAuthenticatorImmutable } from './token-request-based-authenticator-immutable';
/** Configuration options for IAM Request based authentication. */
export interface IamRequestOptions extends BaseOptions {
    /**
     * The `clientId` and `clientSecret` fields are used to form a "basic"
     * authorization header for IAM token requests.
     */
    clientId?: string;
    /**
     * The `clientId` and `clientSecret` fields are used to form a "basic"
     * authorization header for IAM token requests.
     */
    clientSecret?: string;
    /**
     * The "scope" parameter to use when fetching the bearer token from the IAM token server.
     */
    scope?: string;
}
/**
 * The IamRequestBasedAuthenticatorImmutable provides shared configuration and functionality
 * for authenticators that interact with the IAM token service. This authenticator
 * is not meant for use on its own.
 */
export declare class IamRequestBasedAuthenticatorImmutable extends TokenRequestBasedAuthenticatorImmutable {
    protected tokenManager: IamRequestBasedTokenManager;
    protected clientId: string;
    protected clientSecret: string;
    protected scope: string;
    /**
     *
     * Create a new IamRequestBasedAuthenticatorImmutable instance.
     *
     * @param options - Configuration options for IAM authentication.
     * This should be an object containing these fields:
     * - url: (optional) the endpoint URL for the token service
     * - disableSslVerification: (optional) a flag that indicates whether verification of the token server's SSL certificate
     * should be disabled or not
     * - headers: (optional) a set of HTTP headers to be sent with each request to the token service
     * - clientId: (optional) the "clientId" and "clientSecret" fields are used to form a Basic
     * Authorization header to be included in each request to the token service
     * - clientSecret: (optional) the "clientId" and "clientSecret" fields are used to form a Basic
     * Authorization header to be included in each request to the token service
     * - scope: (optional) the "scope" parameter to use when fetching the bearer token from the token service
     *
     * @throws Error: the configuration options are not valid.
     */
    constructor(options: IamRequestOptions);
}