import time
import random
import string


def generate_random_strings(length):
    chars = string.ascii_letters + string.digits
    return "".join(random.choices(chars, k=length))


def get_ms_timestamp():
    ms = time.time_ns() // 1000000
    return ms


def generate_random_digits(length):
    return "".join(random.choices(string.digits, k=length))