import hashlib

from bs4 import BeautifulSoup
import requests


API_ENDPOINT = "https://btc.com/btc/block/"

LAST_HEIGHT = 730445

seed = ""

def get_block(height):
    global seed
    resp = requests.get(API_ENDPOINT + str(height))
    soup = BeautifulSoup(resp.content, 'html.parser')
    block_hash = soup.find_all("div", {"class": "TopSummary_content__39aee"})[0].text
    assert block_hash.startswith("0000")
    
    h = hashlib.sha256(block_hash.encode("utf-8")).hexdigest()
    seed += h[0]
    next_height = int(h, 16) % LAST_HEIGHT
    return next_height

next_height = 0
for _ in range(32):
    next_height = get_block(next_height)

print(seed)