Prerequisites:
- Python 3.x installed on your system.
- 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:
- Make sure to replace the placeholders with your actual values.
- This is a basic example and does not include error handling or advanced features.
- Always use a secure private key and handle it securely.
- 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.