Library for working with NEO related data in Python, without database dependencies.

• Datatypes like UInt160, KeyPair, BigInteger and basic string to address and address to UInt160 methods
• Includes a useful cli-tool np-utils (see help with np-utils -h)
• Compatible with Python 3.5+
• Used by neo-python
• https://pypi.python.org/pypi/neocore

np-utils examples:

$ np-utils -h
usage: np-utils [-h] [--version] [--address-to-scripthash address]
                [--scripthash-to-address scripthash] [--create-wallet]

optional arguments:
-h, --help            show this help message and exit
--version             show program's version number and exit
--address-to-scripthash address
                        Convert an address to scripthash
--scripthash-to-address scripthash
                        Convert scripthash to address
--create-wallet       Create a wallet

$ np-utils --create-wallet
{
"private_key": "KwJqCbjsmGUCqbkp83Nxi9MJ9mA7F8EN4tebJVWjYZBEoWCNxCaF",
"address": "AHVvg26CNz1vxteJfeHy4R8P4VN8SydCM6"
}

$ np-utils --address-to-scripthash AK2nJJpJr6o664CWJKi1QRXjqeic2zRp8y
Scripthash big endian:  0xe9eed8dc39332032dc22e5d6e86332c50327ba23
Scripthash little endian: 23ba2703c53263e8d6e522dc32203339dcd8eee9
Scripthash neo-python format: b'#\xba\'\x03\xc52c\xe8\xd6\xe5"\xdc2 39\xdc\xd8\xee\xe9'

$ np-utils --scripthash-to-address 0xe9eed8dc39332032dc22e5d6e86332c50327ba23
AK2nJJpJr6o664CWJKi1QRXjqeic2zRp8y

$ np-utils --scripthash-to-address 23ba2703c53263e8d6e522dc32203339dcd8eee9
Detected little endian scripthash. Converting to big endian for internal use.
Big endian scripthash: 0xe9eed8dc39332032dc22e5d6e86332c50327ba23
AK2nJJpJr6o664CWJKi1QRXjqeic2zRp8y

Getting started

You need Python 3.5 or higher!

You can install neocore from PyPI with easy_install or pip:

$ pip install -U neocore

Alternatively, if you want to work on the code, clone this repository and setup your venv:

• Clone the repo: git clone https://github.com/CityOfZion/neo-python-core.git
• Create a Python 3 virtual environment and activate it:

$ python3 -m venv venv
$ source venv/bin/activate

• Then install the requirements:

$ pip install -e .
$ pip install -r requirements_dev.txt

Useful commands

$ make lint
$ make test
$ make coverage

Release checklist

(Only for admins)

Releasing a new version on GitHub automatically uploads this release to PyPI. This is a checklist for releasing a new version:

# Only in case you want to increase the version number again (eg. scope changed from patch to minor):
bumpversion --no-tag minor|major

# Update ``HISTORY.rst`` with the new version number and the changes and commit this
vi HISTORY.rst
git commit -m "Updated HISTORY.rst" HISTORY.rst

# Set the release version number and create the tag
bumpversion release

# Increase patch number and add `-dev`
bumpversion --no-tag patch

# Push to GitHub, which also updates the PyPI package
git push && git push --tags