Python bitcoin library

Current version is 2.0

Feature Support

• Basic functions
• Supports addresses types PUBKEY, P2PKH, P2SH, P2SH-PWPKH, P2WPKH, P2WSH.
• Supports BIP32(Hierarchical Deterministic Wallets), BIP39(Mnemonic code generation)
• Supports BIP141(Segregated Witness)
• Transaction constructor

Installation

To install pybtc, simply use pip

$ git clone https://github.com/bitaps-com/pybtc
$ cd pybtc
$ python3 setup.py install

Dependencies

• Python 3.3.3+
• secp256k1

Documentation

Documentation is available at https://pybtc.readthedocs.io

Message signing and verification

Every message sent to the Blockchain is in hash format, and not in plain string. So we convert the message we are signing into a SHA256 hash before.

>>> import pybtc

# ADDRESS GENERATION 
>>> a = pybtc.Address()
>>> a = pybtc.Address(address_type="P2PKH")
>>> a.address
'FTP7LL7QjhgKfqYX1pis18bCqEpZaGSRzZ'
>>> a.private_key.wif
'R8Gw2Mr3n2fY1ydB2X5gEehxHkdhboeUD6yw4wRtVKHaqAd9gdkK'
>>> a.private_key.hex
'16b6aca5ff6a3bf3a1332dd4edf87880b2883cb4fe16effd073e2e866aa141aa'
>>> a.public_key.hex
'033c30b269e2d5df229f3f0ce294b19c4f0a3a8d12280415ce41e7bd3784a619c4'

# CONVERT MESSAGE INTO SHA-256 HASH 
>>> pybtc.sha256(b'vivek'.hex())
b'\xa3\xdas\x97e\x01\x81,\xd7\xb8!\xa2\x0b\xfb\t\xaf\nj\x89\x1eA\x9c\xdf\xb7a\xfb\x19\xa9,\x91BB'
>>> pybtc.sha256(b'vivek'.hex()).hex()
'a3da73976501812cd7b821a20bfb09af0a6a891e419cdfb761fb19a92c914242'
>>> msg = b'vivek'.hex()
>>> msg_hash_hex = sha256(msg).hex()
>>> msg_hash_bytes = sha256(msg)
>>> msg
'766976656b'
>>> msg_hash_hex
'a3da73976501812cd7b821a20bfb09af0a6a891e419cdfb761fb19a92c914242'
>>> msg_hash_bytes
b'\xa3\xdas\x97e\x01\x81,\xd7\xb8!\xa2\x0b\xfb\t\xaf\nj\x89\x1eA\x9c\xdf\xb7a\xfb\x19\xa9,\x91BB'

# SIGN AND VERIFY THE MESSAGE 
>>> sig_msg_hex = pybtc.sign_message(msg_hash_hex, a.private_key.wif)
>>> pybtc.verify_signature(sig_msg_hex, a.public_key.hex, msg_hash_hex)
True

How to Contribute

In order to make a clone of the GitHub repo: open the link and press the “Fork” button on the upper-right menu of the web page.

Workflow is pretty straightforward:

1. Clone the GitHub
2. Make a change
3. Make sure all tests passed
4. Add a record into file into change.log.
5. Commit changes to own pybtc clone
6. Make pull request from github page for your clone against master branch