import { type HttpRequestHandler } from './default-http-request-handler';
export interface JwtServiceAuthOptions {
    endpoint?: string;
    expires?: number;
    impersonate?: string;
    command?: string;
}
export interface AccessToken {
    accessToken: string;
    expiresIn: number;
    expiresAt: number;
}
export declare class JwtServiceAuth {
    private requestHandler;
    private authEndpoint;
    private command;
    constructor(httpRequestHandler?: HttpRequestHandler, options?: JwtServiceAuthOptions);
    static getGoogleAccessTokenFromGCloudHelper(): Promise<AccessToken>;
    static getGoogleAccessToken(keyFileData: string, scopes?: string[] | number | null, options?: JwtServiceAuthOptions): Promise<AccessToken>;
    private static getGoogleAccessTokenFromGCloudHelperImpl;
    getGithubAccessToken(privateKey: string, appId: number, installationId: number, appName?: string, options?: JwtServiceAuthOptions): Promise<AccessToken>;
    getGoogleAccessTokenFromGCloudHelper(): Promise<AccessToken>;
    getGoogleAccessToken(keyFileData: string, scopes?: string[] | number | null, options?: JwtServiceAuthOptions): Promise<AccessToken>;
}