import { ServerType, Target } from '@sasjs/utils';
import SASjs from '@sasjs/adapter/node';
export declare const getAuthUrl: (serverType: ServerType, serverUrl: string, clientId: string) => string;
export declare function getAuthCode(authUrl: string): Promise<string>;
/**
 * Checks if the Access Token is expired or is expiring in 1 hour.  A default Access Token
 * lasts 12 hours. If the Access Token expires, the Refresh Token is used to fetch a new
 * Access Token. In the case that the Refresh Token is expired, 1 hour is enough to let
 * most jobs finish.
 * @param {string} token- token string that will be evaluated
 */
export declare function isAccessTokenExpiring(token: string): boolean;
/**
 * Checks if the Refresh Token is expired or expiring in 30 secs. A default Refresh Token
 * lasts 30 days.  Once the Refresh Token expires, the user must re-authenticate (provide
 * credentials in a browser to obtain an authorisation code). 30 seconds is enough time
 * to make a request for a final Access Token.
 * @param {string} token- token string that will be evaluated
 */
export declare function isRefreshTokenExpiring(token?: string): boolean;
/**
 * Exchanges a refresh token for a new access/refresh token pair.
 * SAS Viya's refresh tokens are single-use and rotate on every call: the
 * `refresh_token` returned here supersedes the one passed in, which becomes
 * invalid immediately. Callers must persist the returned pair (see
 * `saveTokens` in config.ts) or a later refresh attempt with the old token
 * will be rejected by the server.
 */
export declare function refreshTokens(sasjsInstance: SASjs, clientId: string, clientSecret: string, refreshToken: string): Promise<{
    access_token: string;
    refresh_token: string;
}>;
export declare function getNewAccessToken(sasjsInstance: SASjs, clientId: string, clientSecret: string, target: Target): Promise<{
    access_token: string;
    refresh_token: string;
}>;