export interface ClientCredentialsResponse {
    token_type: string;
    expires_in: number;
    ext_expires_in: number;
    access_token: string;
}
interface Options {
    /**
     *
     * Whether to log debug messages & tokens during the token retrieval process.
     * Useful for troubleshooting and understanding the flow of operations.
     *
     * Use with Caution, this could leak secrets!
     */
    debugMode?: boolean;
    /**
     * Whether to skip any token caching and force fresh retrievals
     *
     */
    forceFreshAuth?: boolean;
    /**
     * Treat token as expired if it has less than this many seconds remaining.
     * Helps avoid clock skew / in-flight expiry. (Default 30 secs)
     */
    expirySkewSeconds?: number;
}
export declare class ClientCredentials {
    private readonly tokenUrl;
    private readonly clientId;
    private readonly clientSecret;
    private readonly scope;
    private readonly resource;
    private readonly options;
    private static accessToken;
    private static readonly grantType;
    /**
     * Create a new instance of the ClientCredentials class
     * @param tokenUrl - The URL to fetch the access token from
     * @param clientId - The client id
     * @param clientSecret - The client secret
     * @param scope - The scope of the access token
     * @param resource
     * @param options
     */
    constructor(tokenUrl: string, clientId: string, clientSecret: string, scope: string | undefined, resource: string | undefined, options?: Options);
    /**
     * Helper method to perform the client credentials flow and return the access token
     * This method will check for the existence of the token and if it is expired, it will fetch a new one
     * @returns {Promise<string>} - The access token
     */
    getAccessToken(): Promise<string>;
    /**
     * Fetch the client credentials from the token URL
     * @returns {Promise<ClientCredentialsResponse>} - The response from the token URL
     * @private
     */
    private fetchClientCredentials;
    /**
     * Check if the access token is expired
     * @returns {boolean} - Whether the access token is expired
     * @private
     */
    private static isAccessTokenExpired;
}
export {};