type Ok<T> = {
    readonly ok: true;
    readonly value: T;
};
type Err<E> = {
    readonly ok: false;
    readonly error: E;
};
type Result<T, E = unknown> = Ok<T> | Err<E>;
declare const ok: <T>(value: T) => Ok<T>;
declare const err: <E>(error: E) => Err<E>;
declare const fromPromise: <T>(promise: Promise<T>) => Promise<Result<T, unknown>>;
export { ok, err, fromPromise };
export type { Result };