miner_btc_address = 1GmShbbxQMG7v7RMJwriAGvCxJTpXim4fb Coinbase transactionOutput: 3.525 BTC +3.525 BTC (pending)+3.525 BTC (spendable) coinbase maturity = 100 blocks import hashlib import time import json

def sha256(data: str) → str:     return hashlib.sha256(data.encode()).hexdigest()

def double_sha256(data: str) → str:     return sha256(sha256(data))

transactions = [              “from”: “alice_address”,         “to”: “bob_address”,         “amount”: 0.01,         “fee”: 0.0001     ,              “from”: “john_address”,         “to”: “kate_address”,         “amount”: 0.2,         “fee”: 0.0003      ]

total_fees = sum(tx[“fee”] for tx in transactions)

block_reward = 3.125 miner_address = “1GmShbbxQMG7v7RMJwriAGvCxJTpXim4fb”

coinbase_tx =      “from”: “COINBASE”,     “to”: miner_address,     “amount”: block_reward + total_fees

block_transactions = [coinbase_tx] + transactions

def calculate_merkle_root(transactions):     tx_hashes = []

    for tx in transactions:         tx_string = json.dumps(tx, sort_keys=True)         tx_hashes.append(double_sha256(tx_string))

    while len(tx_hashes) > 1:         new_level = []

        for i in range(0, len(tx_hashes), 2):             left = tx_hashes             right = tx_hashes[i + 1] if i + 1 < len(tx_hashes) else left             new_level.append(double_sha256(left + right))

        tx_hashes = new_level

    return tx_hashes[0]

merkle_root = calculate_merkle_root(block_transactions)

previous_block_hash = “0001abc_previous_block” difficulty_prefix = “0001”  # чем больше нулей, тем сложнее

nonce = 1

while True:     block_header =          “previous_block_hash”: previous_block_hash,         “merkle_root”: merkle_root,         “timestamp”: int(time.time()),         “difficulty”: difficulty_prefix,         “nonce”: nonce     

    block_header_string = json.dumps(block_header, sort_keys=True)     block_hash = double_sha256(block_header_string)

    if block_hash.startswith(difficulty_prefix):         print(“БЛОК НАЙДЕН!”)         print(“Hash:”, block_hash)         print(“Nonce:”, nonce)         print(“Награда майнеру:”, coinbase_tx[“amount”], “BTC”)         print(“1GmShbbxQMG7v7RMJwriAGvCxJTpXim4fb”, miner_address)         break

    nonce += 1 coinbase_tx =      “from”: “COINBASE”,     “to”: miner_address,     “amount”: block_reward + total_fees

if block_hash.startswith(difficulty_prefix): print(“БЛОК НАЙДЕН!”)

coinbase_tx =      “from”: “COINBASE”,     “to”: 1GmShbbxQMG7v7RMJwriAGvCxJTpXim4fb,     “amount”: block_reward + total_fees

block_reward = 3.125 total_fees = 0.4

coinbase_tx =  “from”: “COINBASE”, “to”: “miner_btc_address”, “amount”: block_reward + total_fees

print(coinbase_tx[“amount”]) # 3.525 3.125 BTC block subsidy +0.400 BTC transaction fees =3.525 BTC total coinbase output