cx0der

class Block:
    def __init__(self, index, nonce, prev_hash, timestamp, data, hash):
        self.index = index
        self.nonce = nonce
        self.prev_hash = prev_hash
        self.data = data
        self.timestamp = timestamp
        self.hash = hash

cx0der

import hashlib
def calculate_hash(index, nonce, timestamp, data, prev_hash):
    block_val = str(index) + str(nonce) + prev_hash + str(timestamp) + data
    return hashlib.sha256(block_val.encode("utf-8")).hexdigest()

cx0der

import hashlib

difficulty = 4
pattern = '0000'

def calculate_hash(data_to_hash):
    return hashlib.sha256(data_to_hash.encode("utf-8")).hexdigest()

def mine_block(index, prev_hash, timestamp, data):
    for nonce in range(1, maxNonce):

cx0der

def add_block (data):
    prev_block = get_last_block()
    timestamp = time.time()
    new_block = mine_block(prev_block.index + 1, prev_block.hash, timestamp, data)
    return new_block

cx0der

def mine_genesis_block ():
    timestamp = time.time()
    return mine_block(0, "0", timestamp, "Genisis Block")

cx0der

def mine_genesis_block ():
    timestamp = time.time()
    return mine_block(0, "0", timestamp, "Genisis Block")

chain = [mine_genesis_block()]

cx0der

def is_block_valid(next_block, last_block):
    if last_block.index + 1 != int(new_block["index"]):
        return False
    if last_block.hash != new_block["prev_hash"]:
        return False
    block_val = str(new_block["index"]) + str(new_block["nonce"]) + new_block["prev_hash"] + \
      str(new_block["timestamp"]) + new_block["data"]
    
    if calculate_hash(block_val) != new_block["hash"]:
        return False

cx0der

class HttpHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        if self.path == '/blocks':
            self.set_response_headers(200)
            self.wfile.write(bytes(json.dumps(chain, default=jdefault), "utf8"))
        elif self.path == '/peers':
            self.set_response_headers(200)
            self.wfile.write(bytes(json.dumps(peers), "utf8"))
        else:
            self.set_response_headers(400, "plain/text")

cx0der

<div> <!-- Container -->
  <span></span> <!-- Selected value -->
  <ul>
    <li></li> <!-- Options -->
    <li></li>
    <li></li>
  </ul>
</div>

cx0der

<style lang="scss" scoped>
$background-color: #fff;
$border-color: #101010;
$border-inactive-color: #606060;
$border-radius: 5px;
$item-hover-color: #f5f5f5;
$item-selected-color: rgba(0, 0, 0, .25);

*,
*:before,