import { Response } from '../runtime/types.js';
import '@stacks/transactions';

type StringOnly<T> = Extract<T, string>;
declare function mapValues<T extends Record<string, any>, VO>(obj: T, mapping: <K extends keyof T>(value: T[K], key: K) => VO): Record<keyof T, VO>;
declare function assertNever(x: never): never;
declare const unwrapResponse: <T>(response: Response<T>) => T;
declare const optionalResponse: <T>(response: Response<T>) => T | undefined;

export { type StringOnly, assertNever, mapValues, optionalResponse, unwrapResponse };