import { AuthorizationInterface } from "../types/base/authorization-interface";
export declare class SaySimpleAuthorization implements AuthorizationInterface {
    private readonly authenticationUrl;
    private readonly privateKey;
    private accessToken;
    private accessTokenValidUntil;
    private readonly apiKey;
    private bearerToken;
    constructor(authenticationUrl: string, apiToken: string, privateKey?: string);
    getAccessToken(): Promise<string>;
    isAccessTokenValid(): boolean;
    authenticate(): Promise<void>;
    private generateJWT;
    getAuthorizationType(): "Bearer" | "Basic";
    needsAuthorizationHeader(): boolean;
}