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import hashlib
from cryptography.hazmat.primitives.asymmetric import ec, rsa
from cryptography.hazmat.primitives import serialization, hashes
from cryptography.hazmat.primitives.asymmetric import padding

# Generate ECC private key
private_key = ec.generate_private_key(ec.SECP256R1())

# Generate RSA-512 public key
rsa_private_key = rsa.generate_private_key(
    public_exponent=65537,
    key_size=512
)
rsa_public_key = rsa_private_key.public_key()

# Cryptocurrency Transaction
def send_cryptocurrency(recipient, amount):
    # Serialize ECC private key
    private_key_pem = private_key.private_bytes(
        encoding=serialization.Encoding.PEM,
        format=serialization.PrivateFormat.PKCS8,
        encryption_algorithm=serialization.NoEncryption()
    )

    # Load ECC private key
    loaded_private_key = serialization.load_pem_private_key(
        private_key_pem,
        password=None
    )

    # Serialize RSA-512 public key
    rsa_public_key_pem = rsa_public_key.public_bytes(
        encoding=serialization.Encoding.PEM,
        format=serialization.PublicFormat.SubjectPublicKeyInfo
    )

    # Encrypt recipient and amount using RSA-512 public key
    encrypted_recipient = rsa_public_key.encrypt(
        recipient.encode(),
        padding.OAEP(
            mgf=padding.MGF1(algorithm=hashes.SHA256()),
            algorithm=hashes.SHA256(),
            label=None
        )
    )
    encrypted_amount = rsa_public_key.encrypt(
        str(amount).encode(),
        padding.OAEP(
            mgf=padding.MGF1(algorithm=hashes.SHA256()),
            algorithm=hashes.SHA256(),
            label=None
        )
    )

    # Sign the encrypted recipient and amount using ECC private key
    signature = loaded_private_key.sign(
        encrypted_recipient + encrypted_amount,
        ec.ECDSA(hashes.SHA256())
    )

    # Simulate cryptocurrency transaction
    transaction_successful = True  # Placeholder transaction success

    if transaction_successful:
        return encrypted_recipient, encrypted_amount, signature
    else:
        return None


# Example usage
def main():
    recipient = "recipientAddress"
    amount = 10.0

    # Cryptocurrency Transaction
    transaction_data = send_cryptocurrency(recipient, amount)
    if transaction_data:
        encrypted_recipient, encrypted_amount, signature = transaction_data
        print("Encrypted Recipient:", encrypted_recipient)
        print("Encrypted Amount:", encrypted_amount)
        print("Signature:", signature)
        print("Cryptocurrency transaction successful!")
    else:
        print("Cryptocurrency transaction failed.")


if __name__ == "__main__":
    main()