import { Strategy } from './Strategy';
import { Context } from 'koa';
import { ValidationResult } from './results';
/**
 * session.
 *
 * @export
 * @class SessionStrategy
 * @extends {Strategy}
 */
export declare class SessionStrategy extends Strategy {
    /**
     * `SessionStrategy` constructor.
     *
     */
    constructor();
    /**
     * Authenticate request based on the current session state.
     *
     * The session authentication strategy uses the session to restore any login
     * state across requests.  If a login session has been established, `req.user`
     * will be populated with the current user.
     *
     * This strategy is registered automatically by Passport.
     *
     */
    authenticate(ctx: Context, options?: {}): Promise<ValidationResult>;
    static ρAnn(): any;
}