/**
 * get csrf token for current session
 */
export declare const csrf_token: () => string;
/**
 * get old input from session
 */
export declare const old: (key: string) => any;
/**
 * get errors validation
 */
export declare const errors: (key?: string) => any;
/**
 * get sessions
 */
export declare const session: (key?: string) => any;