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Clarify and widen license exceptions 

The intent is to make clear that it is possible to extend the functionality of Zcash implementations (not necessarily only published by the ECC or ZF), and to experiment on testnets, while still relying on the BOSL exception. The leeway given to forks is increased to 3456 blocks (roughly 3 days) to make reasonable allowance for release processes.
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Daira Hopwood 2022-05-19 16:47:35 -07:00 committed by GitHub
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COPYING
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@ -5,16 +5,30 @@ Source License, version 1.0, or at your option, any later version ("BOSL"). See
the file ./LICENSE-BOSL for the terms of the Bootstrap Open Source Licence,
version 1.0.
In this document,
- "Zcash" means the blockchain defined by the most recent agreement between
the Electric Coin Company and the Zcash Foundation according to section 6.2 (b)
of the Zcash Trademark Agreement.
- A "Zcash Chain Fork" means a blockchain that descends from the Zcash
blockchain and that is or was forked within 3456 blocks of the current block
height of the Zcash blockchain at the time of the fork;
- A "Zcash Technology Testnet" means a blockchain designed for the purpose of
testing technology potentially of use to the Zcash blockchain and not for
the purpose of implementing any token of economic value, where this purpose
and lack of such economic value are clearly communicated to its users and to
the general public.
Only if this Original Work is included as part of the distribution of one of the
following (each, the "Project"):
- The Zcash projects published by the Electric Coin Company;
- The Zebra project published by the Zcash Foundation;
- A project that is designed to integrate with Zcash and provides additional
functionality or utility to the Zcash network and holders of the ZEC coin; or
- A blockchain that descends from the Zcash blockchain and that is forked
within 100 blocks of the current block height of the Zcash blockchain at the
time of the code fork;
- A project that implements Zcash;
- A project that implements a Zcash Chain Fork;
- A project that implements a Zcash Technology Testnet;
- A project that is designed to integrate with Zcash (whether or not it can
also integrate with one or more Zcash Chain Forks), and that provides
additional functionality or utility to the Zcash network and holders of
the ZEC coin;
then License is granted to use the Original Work under the BOSL as modified by
the following clarification and special exception. This exception applies only
@ -22,6 +36,10 @@ to the Original Work when linked or combined with the Project and not to the
Original Work when linked, combined, or included in or with any other software
or project or on a standalone basis.
For the avoidance of doubt, "a project that implements Zcash" includes, but is
not limited to, the Zcash projects published by the Electric Coin Company and
the Zebra project published by the Zcash Foundation.
Under the terms of the BOSL, linking or combining this Original Work with
the Project creates a Derivative Work based upon the Original Work and the
terms of the BOSL thus apply to both the Original Work and that Derivative