proof-of-work-checker

proof_of_work_checker.py

import hashlib

DIFFICULTY = 3  # Number of leading zeros required

def meets_difficulty(hash_string):
    """Checks if the hash string starts with the required number of zeros."""
    return hash_string.startswith("0" * DIFFICULTY)

def main():
    """Hashes "Hello, World!" with varying nonces to find a valid hash."""
    data = "Hello, World!"
    nonce = 0

    while True:
        # Combine data and nonce into bytes for hashing
        data_and_nonce = data.encode() + nonce.to_bytes(8, byteorder="big")

        # Perform SHA-256 hashing
        hash_digest = hashlib.sha256(data_and_nonce).hexdigest()

        # Check if the hash meets the difficulty target
        if meets_difficulty(hash_digest):
            print(f"Found valid hash with nonce: {nonce}")
            print(f"Hash: {hash_digest}")
            break  # Exit the loop once a valid hash is found

        # Increment the nonce for the next iteration
        nonce += 1

if __name__ == "__main__":
    main()