superdev7788

import random
from typing import Optional, Any, List, Tuple


class SkipListNode:
    """Node in the skip list containing key-value pair and forward pointers"""

    def __init__(self, key: Any, value: Any, level: int):
        self.key = key
        self.value = value

superdev7788

class Broker:
    def __init__(self):
        # A dictionary to store topics and their subscribers
        # key: topic (string), value: set of subscriber callback functions
        self.subscribers = {}

    def subscribe(self, topic, callback):
        """Adds a new subscriber to a topic."""
        # If the topic doesn't exist, create an empty set for it
        if topic not in self.subscribers:

superdev7788

class EventBus:
    def __init__(self):
        # A dictionary to store event types and their listener functions
        # key: event_type (string), value: list of listener functions
        self.listeners = {}

    def on(self, event_type, listener):
        """Registers a listener for a specific event type."""
        if event_type not in self.listeners:
            self.listeners[event_type] = []

superdev7788

import struct
import math


class SimpleMD5:
    def __init__(self):
        # MD5 constants
        self.h = [0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476]

        # Pre-computed sine values for MD5 rounds

superdev7788

import struct
from typing import List, bytes as Bytes

class SHA256:
    """
    A complete implementation of SHA-256 hash algorithm.
    
    This implementation is for educational purposes and to understand
    the inner workings of SHA-256. For production use, always use
    the hashlib library which is optimized and thoroughly tested.

superdev7788

import os
import hmac
import hashlib
import struct
import base64
from typing import bytes as Bytes, Tuple, List
import time
import secrets

class SimpleBcrypt: