export type Result<T, E = Error> = Success<T> | Failure<E>;
export type Success<T> = {
    readonly ok: true;
    readonly value: T;
};
export type Failure<E> = {
    readonly ok: false;
    readonly error: E;
};
export declare const ok: <T>(value: T) => Success<T>;
export declare const err: <E>(error: E) => Failure<E>;
export declare const mapResult: <T, U, E>(result: Result<T, E>, fn: (value: T) => U) => Result<U, E>;
export declare const flatMapResult: <T, U, E>(result: Result<T, E>, fn: (value: T) => Result<U, E>) => Result<U, E>;
export declare const getOrElse: <T, E>(result: Result<T, E>, defaultValue: T) => T;
export declare const getOrThrow: <T, E>(result: Result<T, E>) => T;
export declare const mapError: <T, E, F>(result: Result<T, E>, fn: (error: E) => F) => Result<T, F>;
export declare const toPromise: <T, E>(result: Result<T, E>) => Promise<T>;