promises

// Creating a Promise
const myPromise = new Promise((resolve, reject) => {
  const success = true;

  setTimeout(() => {
    if (success) {

export type Settled<R> =
  | { status: 'fulfilled'; value: R }
  | { status: 'rejected'; reason: unknown };

export interface ConcurrencyOptions {
  limit: number;

import { EventEmitter } from "events";

export interface Job<T> {
  id: string;
  payload: T;
  attempts: number;