bitsv 0.8.0

Noticeboard:

Latest Release - 0.8.0 (2019-7-13)

• Big changes. Take note!

Legacy Addresses:

• Bitcoin SV will be reinstating legacy address format as the default standard (see: https://bitcoinsv.io/2019/07/12/bitcoin-sv-node-v0-2-1-released/). However, “cashaddress” is a great tool for conversions if needed. https://github.com/oskyk/cashaddress/

Default Fee = 1 sat/byte:

• The capacity of the Bitcoin SV network is such that 1 sat/byte virtually guarantees that your transaction will be included in the next block. This is therefore the default. However, it is trivial to specify a higher transaction fee by including this as an additional parameter to any of the transaction related functions.

Planned improvements

• Improved coverage of testing modules (currently at 84%).

• Support for use of a local bitcoin full node instead of a Web-API. (paves the way for a RegTest environment for a rapid development cycle)

• Work on the bsvbip32 library for hierarchical deterministic keys: https://github.com/AustEcon/bsvbip32. Plan for each node to access bitsv functionality so that building apps can be a breeze! (competing implementations welcome. That’s partly why modularity is a good idea!)

Examples

BitSV is so easy to use:

1. Simple payment:

>>> import bitsv
>>> my_key = bitsv.Key('YourPrivateKeyGoesHere')  # Defaults to "main" network
>>> my_key.get_balance()
10000000  # satoshis
>>> # Can include a long list of tuples as outputs
>>> outputs = [
>>>     # Donate to AustEcon! (Currency conversion via api)
>>>     ('1PdvVPTzXmo4cSs68HctLUxAdW917UZtC8', 0.10, 'usd'),  # $USD 0.10 as bsv
>>>     ('1PdvVPTzXmo4cSs68HctLUxAdW917UZtC8', 0.0001, 'bsv')
>>> ]
>>> my_key.send(outputs)
'dec895d1aa0e820984c5748984ba36854163ec3d6847c94e82a921765c5b23e1'

Here’s the transaction https://whatsonchain.com/tx/dec895d1aa0e820984c5748984ba36854163ec3d6847c94e82a921765c5b23e1.

2. OP_RETURN - 100kb size limit now supported:

>>> import bitsv
>>> my_key = bitsv.Key('YourPrivateKeyGoesHere')
>>> list_of_pushdata = ([bytes.fromhex('6d01'),  # encode hex to bytes
                         'New_Name'.encode('utf-8')])  # encode string to utf-8 encoded bytes
>>> my_key.send_op_return(list_of_pushdata)  # default fee = 1 sat/byte

This sets memo.sv name (linked to this bitcoin address) to “New_Name” (as per https://memo.sv/protocol)

Features

• Python’s fastest available implementation (100x faster than closest library)

• 100kb OP_RETURN transactions made very simple

• Fully supports 21 different currencies via exchange rate API

• First class support for storing data in the blockchain

• Compressed public keys by default

• Multiple representations of private keys; WIF, PEM, DER, etc.

• Standard P2PKH transactions

Installation

BitSV is distributed on PyPI as a universal wheel and is available on Linux/macOS and Windows and supports Python 3.5+ and PyPy3.5-v5.7.1+. pip >= 8.1.2 is required.

$ pip install bitsv  # pip3 if pip is Python 2 on your system.

Documentation

Docs are hosted by Github Pages and are automatically built and published by Travis after every successful commit to BitSV’s master branch.

Credits

• ofek for the original bit codebase.

• teran-mckinney for his work on the bitcash fork

• joshua smith for adding BitIndex3

Donate

• If you have found this library useful, please consider donating. It really helps.

• HandCash: $AustEcon

• 1PdvVPTzXmo4cSs68HctLUxAdW917UZtC8