To help you get started, we've collected the most common ways that bitcoinlib is being used within popular public projects.

1200wd / bitcoinlib / bitcoinlib / mnemonic.py View on Github

Convert Mnemonic words back to key data entropy

        :param words: Mnemonic words as string of list of words
        :type words: str
        :param includes_checksum: Boolean to specify if checksum is used. Default is True
        :type includes_checksum: bool
        
        :return bytes: Entropy seed
        """
        words = self.sanitize_mnemonic(words)
        if isinstance(words, TYPE_TEXT):
            words = words.split(' ')
        wi = []
        for word in words:
            wi.append(self._wordlist.index(word))
        ent = change_base(wi, 2048, 256, output_even=False)
        if includes_checksum:
            binresult = change_base(ent, 256, 2, len(ent) * 4)
            ent = change_base(binresult[:-len(binresult) // 33], 2, 256)

            # Check checksum
            checksum = binresult[-len(binresult) // 33:]
            if checksum != self.checksum(ent):
                raise ValueError("Invalid checksum %s for entropy %s" % (checksum, ent))

        return ent

View more ways to use bitcoinlib

Python Bitcoin Library

Bitcoin cryptocurrency Library writen in Python.

Allows you to create a fully functional Bitcoin wallet with a single line of code. Use this library to create and manage transactions, addresses/keys, wallets, mnemonic password phrases and blocks with simple and straightforward Python code.

You can use this library at a high level and create and manage wallets from the command line or at a low level and create your own custom made transactions, scripts, keys or wallets.

The BitcoinLib connects to various service providers automatically to update wallets, transaction and blockchain information. You can also connect to a local Bitcoin or Bcoin node.

Install

Install required packages on Ubuntu or related Linux systems:

$ sudo apt install build-essential python3-dev libgmp3-dev

Then install using pip

$ pip install bitcoinlib

Check out the more detailed installation instructions to read how to install on other systems or for troubleshooting.

If you are using docker you can check some Dockerfiles to create images in the docker directory.

Documentation

Read the full documentation at:

Example

The bitcoin library contains a wallet implementation using SQLAlchemy and SQLite3 to import, create and manage keys in a Hierarchical Deterministic way.

Example: Create wallet and generate new address (key) to receive bitcoins

>>> from bitcoinlib.wallets import Wallet
>>> w = Wallet.create('Wallet1')
>>> w.get_key().address
'bc1qk25wwkvz3am9smmm3372xct5s7cwf0hmnq8szj'

Now send a small transaction to your wallet and use the scan() method to update transactions and UTXO's

>>> w.scan()
>>> w.info()  # Shows wallet information, keys, transactions and UTXO's

When your wallet received a payment and has unspent transaction outputs, you can send bitcoins easily. If successful a transaction ID is returned

>>> t = w.send_to('bc1qemtr8ywkzg483g8m34ukz2l4pl3730776vzq54', '0.001 BTC', offline=False)
'b7feea5e7c79d4f6f343b5ca28fa2a1fcacfe9a2b7f44f3d2fd8d6c2d82c4078'
>>> t.info  # Shows transaction information and send results

More examples

You can find many more examples in the documentation for instance about the Wallet.create() method.

There are many working examples on how to create wallets, specific transactions, encrypted databases, parse the blockchain, connect to specific service providers in the examples directory in the source code of this library.

Some more specific examples can be found on the Coineva website.

Contact

If you have any questions, encounter a problem or want to share an idea, please use Github Discussions

Implements the following Bitcoin Improvement Proposals

• Hierarchical Deterministic Wallets (BIP0032)
• Passphrase-protected private key (BIP0038)
• Mnemonic code for generating deterministic keys (BIP0039)
• Purpose Field for Deterministic Wallets (BIP0043)
• Multi-Account Hierarchy for Deterministic Wallets (BIP0044)
• Structure for Deterministic P2SH Multisignature Wallets (BIP0045)
• Bech32/base32 address format for native v0-16 witness outputs (BIP0173)
• Native and P2SH nested Segregated Witness transactions (BIP0141 and BIP0143)
• Bech32m format for v1+ witness addresses (BIP0350)
• and many more...

Future / Roadmap

• Fully support timelocks
• Support Taproot and Schnorr signatures
• Support advanced scripts
• Support for Trezor wallet or other hardware wallets
• Allow to scan full blockchain
• Integrate simple SPV client

Disclaimer

This library is still in development, please use at your own risk and test sufficiently before using it in a production environment.