IMPORTANT: This library is being actively developed and should not be used in production software.
Copyright 2020 The Electric Coin Company.
You may use this package under the Transitive Grace Period Public Licence,
version 1.0, or at your option, any later version. See the file
LICENSE-TGPPL for the terms of the Transitive Grace Period
Public Licence, version 1.0.
The purpose of the TGPPL is to allow commercial improvements to the package while ensuring that all improvements are eventually open source. See here for why the TGPPL exists, graphically illustrated on three slides.