To create a Bitcoin RawTX transaction with a positive balance of BTC, we’ll use the provided source code. Here’s a step-by-step guide

23.04.2024

Prerequisites:

  1. Python 3.x installed on your system.
  2. The five provided source code files downloaded and saved in the same directory.

Step 1: Prepare the necessary variables

Create a new Python file, e.g., create_rawtx.py, and add the following code:

import hashlib
import struct

# Set the values for the transaction
private_key = 'your_private_key_here'  # Replace with your private key
public_key = 'your_public_key_here'  # Replace with your public key
tx_inputs = [
    {'tx_id': 'your_transaction_id_here', 'vout': 0, 'script_pub_key': 'your_script_pub_key_here'},
    # Add more inputs if needed
]
tx_outputs = [
    {'value': 10000, 'script_pub_key': 'your_script_pub_key_here'},  # Replace with the desired output value and script
    # Add more outputs if needed
]
locktime = 0
version = 2

Replace the placeholders with your actual values.

Step 2: Calculate the transaction hash

Add the following code to calculate the transaction hash:

def calculate_tx_hash(tx_inputs, tx_outputs, locktime, version):
    tx_hash = hashlib.sha256(hashlib.sha256(
        bytes.fromhex(''.join([
            struct.pack('<I', version),
            ''.join([tx_input['tx_id'] + struct.pack('<I', tx_input['vout']) for tx_input in tx_inputs]),
            ''.join([struct.pack('<Q', tx_output['value']) + tx_output['script_pub_key'] for tx_output in tx_outputs]),
            struct.pack('<I', locktime)
        ]))
    ).digest()).digest()
    return tx_hash.hex()

tx_hash = calculate_tx_hash(tx_inputs, tx_outputs, locktime, version)

Step 3: Create the signature

Add the following code to create the signature using the provided sign.py and sighash.py files:

from sign import sign_tx
from sighash import sighash

def create_signature(private_key, tx_hash, sighash_type):
    sighash_value = sighash(tx_hash, sighash_type)
    signature = sign_tx(private_key, sighash_value)
    return signature

sighash_type = 'ALL'
signature = create_signature(private_key, tx_hash, sighash_type)

Step 4: Create the RawTX transaction

Add the following code to create the RawTX transaction using the provided signing.py file:

from signing import signing

def create_rawtx(tx_inputs, tx_outputs, locktime, version, signature):
    rawtx = signing(tx_inputs, tx_outputs, locktime, version, signature)
    return rawtx

rawtx = create_rawtx(tx_inputs, tx_outputs, locktime, version, signature)
print(rawtx)

Step 5: Run the script

Run the create_rawtx.py script using Python:

python create_rawtx.py

This will output the RawTX transaction.

Note:

  1. Make sure to replace the placeholders with your actual values.
  2. This is a basic example and does not include error handling or advanced features.
  3. Always use a secure private key and handle it securely.
  4. This code is for educational purposes only and should not be used in production without proper testing and validation.

By following these steps, you should be able to create a Bitcoin RawTX transaction with a positive balance of BTC using the provided source code.