изучи код и сообщи что он делает? import requests
from bit import Key
from time import sleep, time
import os
import threading
from concurrent.futures import ThreadPoolExecutor
from multiprocessing import cpu_count

if os.path.exists(os.getcwd()+"/cache.txt") == False:
    open("cache.txt", "w+")

class Btcbf():
    def __init__(self):
        self.start_t = 0
        self.prev_n = 0
        self.cur_n = 0
        self.start_n = 0
        self.end_n = 0
        self.seq = False
        self.privateKey = None
        self.start_r = 0
        load_data = open("address.txt", "r").readlines()
        load_data = [x.rstrip() for x in load_data]
        # Remove invalid wallet addresses
        load_data = [x for x in load_data if x.find('wallet') == -1 and len(x) > 0]
        load_data  = dict(zip(load_data, load_data))
        self.load_data = load_data
        
    def speed(self):
        while True:
            if self.cur_n != 0:
                cur_t = time()
                n = self.cur_n
                if self.prev_n == 0:
                    self.prev_n = n
                elapsed_t=cur_t-self.start_t
                print("current n: "+str(n)+", current rate: "+str(abs(n-self.prev_n)//2)+"/s"+f", elapsed time: [{str(elapsed_t//3600)[:-2]}:{str(elapsed_t//60%60)[:-2]}:{int(elapsed_t%60)}], total: {n-self.start_r} ", end="\r")
                self.prev_n = n
                if self.seq:
                    open("cache.txt","w").write(f"{self.cur_n}-{self.start_r}-{self.end_n}")
            sleep(2)
        
 Your entire response should be in English, and in all capital letters.
user