54 lines
2.8 KiB
Plaintext
54 lines
2.8 KiB
Plaintext
Copyright (c) 2016-2022 The Zcash developers
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Copyright (c) 2009-2022 The Bitcoin Core developers
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Copyright (c) 2009-2022 Bitcoin Developers
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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The MIT software license (https://www.opensource.org/licenses/mit-license.php)
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above applies to the code directly included in this source distribution, with
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the exception of certain Autoconf macros. Dependencies downloaded as part of
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the build process may be covered by other open-source licenses. The MIT-licensed
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source code is not considered a derived work of these Autoconf macros or of the
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dependencies. For further details see 'contrib/debian/copyright'.
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Although almost all of the Zcash code is licensed under "permissive" open source
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licenses, there are two dependencies that use "copyleft" open source licenses:
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- Users and distributors should note that when built using the default build
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options, zcashd depends on Oracle Berkeley DB 6.2.x, which is licensed under
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the GNU Affero General Public License.
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- Downstream code forks should note that zcashd depends on the 'orchard' crate,
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which is licensed under the Bootstrap Open Source License.
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A license exception is provided allowing some derived works that are linked or
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combined with the 'orchard' crate to be copied or distributed under the original
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licenses (in this case documented in 'contrib/debian/copyright'), provided that
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the included portions of the 'orchard' code remain subject to BOSL.
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See https://github.com/zcash/orchard/blob/main/COPYING for details of which
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projects can make use of this exception.
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Contributors should understand licensing implications before modifying the
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following files in build-aux/m4 (see https://github.com/zcash/zcash/issues/2827):
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* ax_check_compile_flag.m4
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* ax_check_link_flag.m4
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* ax_check_preproc_flag.m4
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* ax_pthread.m4
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