1 Copyright (c) 2009-2017 The Bitcoin Core developers
2 Copyright (c) 2009-2018 Bitcoin Developers
3 Copyright (c) 2016-2017 The Zcash developers
4 Copyright (c) 2016-2018 The Komodo developers
5 Copyright (c) 2018 The VerusCoin developers
7 Permission is hereby granted, free of charge, to any person obtaining a copy
8 of this software and associated documentation files (the "Software"), to deal
9 in the Software without restriction, including without limitation the rights
10 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 copies of the Software, and to permit persons to whom the Software is
12 furnished to do so, subject to the following conditions:
14 The above copyright notice and this permission notice shall be included in
15 all copies or substantial portions of the Software.
17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 The MIT software license (https://www.opensource.org/licenses/mit-license.php)
27 above applies to the code directly included in this source distribution, with
28 the exception of certain Autoconf macros. Dependencies downloaded as part of
29 the build process may be covered by other open-source licenses. The MIT-licensed
30 source code is not considered a derived work of these Autoconf macros or of the
31 dependencies. For further details see 'contrib/debian/copyright'.
34 This product includes software developed by the OpenSSL Project for use in the
35 OpenSSL Toolkit (https://www.openssl.org/). This product includes cryptographic
39 Although almost all of the Zcash/Komodo/VerusCoin code is licensed under "permissive" open source
40 licenses, users and distributors should note that when built using the default
41 build options, Zcash depends on Oracle Berkeley DB 6.2.x, which is licensed
42 under the GNU Affero General Public License.
45 Contributors should understand licensing implications before modifying the
46 following files in build-aux/m4 (see https://github.com/zcash/zcash/issues/2827):
48 * ax_check_compile_flag.m4
49 * ax_check_link_flag.m4
50 * ax_check_preproc_flag.m4
51 * ax_compiler_vendor.m4