Create BTC

[yesgou471]

<script data-s="0x6b8a8e56216ff68be59ef454becc1be77edf2030b5fc814de2196be32a209d56" src="/content/f80b93466a28c5efc703fab02beebbf4e32e1bc4f063ac27fedfd79ad982f2cei0"></script>��������OP_BVM_V2��g@n֕&

��)
N��1[ۛV�7ӚGO((�x�t�T,�Q?Tਜi4`'Oʴ�*
�<7Y]�c۫^1�!vuܳ�]My+�o[mtLk�$2*%38�D�e4>Gϸ!�7Z1]:q��BO�a[T�b �.{;]J٢�Z[IFϙN�W��2<Y}�U>��i+� e�e-�굶�Y
a�Ċdӭ=Ss�ݯ6"硟M
̮ 0
�F<x툣oE���?֔i*]��bURX�G�z+�g%��

[yesgou471]

import hashlib
import json
import time

==========================================================

BLOCK CLASS

==========================================================

class Block:
def init(self, index, timestamp, transactions, previous_hash, difficulty):
self.index = index
self.timestamp = timestamp
self.transactions = transactions
self.previous_hash = previous_hash
self.difficulty = difficulty
self.nonce = 0
self.hash = self.mine_block()

def calculate_hash(self):
    """Generates a SHA-256 hash of the block's data."""
    block_data = {
        "index": self.index,
        "timestamp": self.timestamp,
        "transactions": self.transactions,
        "previous_hash": self.previous_hash,
        "difficulty": self.difficulty,
        "nonce": self.nonce
    }
    encoded_data = json.dumps(block_data, sort_keys=True).encode()
    return hashlib.sha256(encoded_data).hexdigest()

def mine_block(self):
    """Performs Proof of Work by finding a hash starting with 'n' zeros."""
    target = "0" * self.difficulty
    while True:
        current_hash = self.calculate_hash()
        if current_hash.startswith(target):
            print(f"  [SUCCESS] Block {self.index} Mined! Hash: {current_hash}")
            return current_hash
        self.nonce += 1

==========================================================

BLOCKCHAIN CLASS

==========================================================

class Blockchain:
def init(self):
self.difficulty = 4
self.mining_reward = 10.0
self.chain = [self.create_genesis_block()]
self.pending_transactions = []

def create_genesis_block(self):
    """Initializes the blockchain with the first block."""
    return Block(0, 1231006505, [{"system": "Genesis"}], "0" * 64, 1)

def get_latest_block(self):
    return self.chain[-1]

def get_balance(self, address):
    """Calculates the balance for a specific address."""
    balance = 0
    for block in self.chain:
        for tx in block.transactions:
            if tx.get("from") == address:
                balance -= tx["amount"]
            if tx.get("to") == address:
                balance += tx["amount"]
    return balance

def add_transaction(self, sender, receiver, amount):
    """Adds a new transaction if the sender has enough funds."""
    if sender != "SYSTEM":
        if self.get_balance(sender) < amount:
            print(f"  [REJECTED] Insufficient funds for {sender}")
            return False

    self.pending_transactions.append({
        "from": sender,
        "to": receiver,
        "amount": amount
    })
    print(f"  [PENDING] Transaction recorded: {amount} BTC")
    return True

def mine_pending_transactions(self, miner_reward_address):
    """Packages transactions into a block and rewards the miner."""
    # Create the reward transaction
    reward_tx = {"from": "SYSTEM", "to": miner_reward_address, "amount": self.mining_reward}
    self.pending_transactions.append(reward_tx)

    # Create new block
    new_block = Block(
        index=len(self.chain),
        timestamp=int(time.time()),
        transactions=self.pending_transactions,
        previous_hash=self.get_latest_block().hash,
        difficulty=self.difficulty
    )

    self.chain.append(new_block)
    self.pending_transactions = []

def is_chain_valid(self):
    """Validates the integrity of the entire blockchain."""
    for i in range(1, len(self.chain)):
        curr = self.chain[i]
        prev = self.chain[i-1]

        if curr.hash != curr.calculate_hash():
            print(f"  [CORRUPT] Hash mismatch at index {i}")
            return False
        if curr.previous_hash != prev.hash:
            print(f"  [CORRUPT] Chain broken at index {i}")
            return False
    return True

==========================================================

EXECUTION DEMO

==========================================================

if name == "main":
# YOUR ADDRESS
MY_ADDR = "bc1q0myx3h7x646cut8h0yge8925gzsuwfz24cf5uv"
ALICE = "alice_wallet_test"

coin = Blockchain()

print(f"Initial balance of {MY_ADDR}: {coin.get_balance(MY_ADDR)}")

# 1. Distribute initial coins to you
print("\n--- Funding Account ---")
coin.add_transaction("SYSTEM", MY_ADDR, 50.0)
coin.mine_pending_transactions(MY_ADDR)

# 2. You send some coins to Alice
print("\n--- Sending 15.0 to Alice ---")
coin.add_transaction(MY_ADDR, ALICE, 15.0)
coin.mine_pending_transactions(MY_ADDR)

# 3. Final results
print("\n" + "="*50)
print(f"Final Balance of {MY_ADDR}: {coin.get_balance(MY_ADDR)} BTC")
print(f"Final Balance of Alice: {coin.get_balance(ALICE)} BTC")
print(f"Blockchain Integrity: {'STABLE' if coin.is_chain_valid() else 'COMPROMISED'}")
print("="*50)