block_creation.py

import hashlib
import time

class Block:
    def __init__(self, index, previous_hash, timestamp, data, hash=None):
        self.index = index
        self.previous_hash = previous_hash
        self.timestamp = timestamp
        self.data = data
        self.hash = hash if hash else self.calculate_hash()

    def calculate_hash(self):
        return hashlib.sha256(f"{self.index}{self.previous_hash}{self.timestamp}{self.data}".encode()).hexdigest()

class Blockchain:
    def __init__(self):
        self.chain = [self.create_genesis_block()]

    def create_genesis_block(self):
        return Block(0, "0", int(time.time()), "Genesis Block")

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

    def add_block(self, new_block):
        new_block.previous_hash = self.get_latest_block().hash
        new_block.hash = new_block.calculate_hash()
        self.chain.append(new_block)

def main():
    blockchain = Blockchain()

    # Add some blocks to the blockchain
    blockchain.add_block(Block(1, blockchain.get_latest_block().hash, int(time.time()), "Transaction 1"))
    blockchain.add_block(Block(2, blockchain.get_latest_block().hash, int(time.time()), "Transaction 2"))

    # Print the blockchain
    for block in blockchain.chain:
        print(f"Block #{block.index} - Hash: {block.hash}")
        print(f"Previous Hash: {block.previous_hash}")
        print(f"Data: {block.data}")
        print(f"Timestamp: {block.timestamp}\n")

if __name__ == "__main__":
    main()