import type { Resolvable } from './common-types.js';
import { TypedError } from 'typed-error';
export type MappingFunction = <T, U>(a: T[], fn: (v: T) => Resolvable<U>) => Promise<Array<U | Error>>;
export declare const mapSeries: <T, U>(a: T[], fn: (v: T) => Resolvable<U>) => Promise<U[]>;
export declare const settleMapSeries: MappingFunction;
export declare const getMappingFn: (headers?: {
    prefer?: string | string[];
    [key: string]: string | string[] | undefined;
}) => MappingFunction;
export declare const delay: (ms: number) => Promise<void>;
export declare const fromCallback: <T>(resolver: (callback: (err: any, result?: T) => void) => void) => Promise<T>;
export declare class TimeoutError extends TypedError {
}
export declare const timeout: <T>(promise: Promise<T>, ms: number, msg?: string) => Promise<T>;