COPYING

Copyright 2014-2020 Hcnet Development Foundation and contributors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

As well as the file LICENSE-APACHE.txt adjacent to this file.

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.


Additional files found in the subdirectory lib are copies of liberally
licensed external libraries (that we believe to be compatible with the license
text of the collective work, above). The following are restatements of license
information found in those files and/or their respective upstream repositories:

lib/autocheck:

  The Autocheck library,
  Copyright 2012-2013 John Freeman
  (https://github.com/thejohnfreeman)
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

lib/asio:

  The ASIO library,
  Copyright 2003-2015 Christopher M. Kohlhoff
  (chris at kohlhoff dot com)
  (http://think-async.com/Asio)
  Licensed under the Boost Software License 1.0
  (http://www.boost.org/LICENSE_1_0.txt)

lib/bloom_filter.hpp:

  The C++ Open Bloom Filter Library,
  Copyright 2000 Arash Partow
  (arash at partow dot net)
  (https://www.partow.net/programming/bloomfilter/index.html)
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

lib/catch.hpp:

  The Catch library,
  Copyright 2012 Two Blue Cubes Ltd.
  (https://github.com/catchorg/Catch2)
  Licensed under the Boost Software License 1.0
  (http://www.boost.org/LICENSE_1_0.txt)

lib/http:

  Example HTTP server from the ASIO library,
  Copyright 2003-2014 Christopher M. Kohlhoff
  (chris at kohlhoff dot com)
  (http://think-async.com/Asio)
  Licensed under the Boost Software License 1.0
  (http://www.boost.org/LICENSE_1_0.txt)

lib/util/getopt.h and getopt_long.c:

  NetBSD's getopt/getopt_long libraries,
  Copyright 2000 The NetBSD Foundation, Inc.
  Copyright 2002 2002 Todd C. Miller <Todd.Miller@courtesan.com>
  Licensed under the 2-clause BSD license
  (http://opensource.org/licenses/BSD-2-Clause)

lib/util/cpptoml.h:

  The cpptoml library,
  Copyright 2013-2014 Chase Geigle
  (https://github.com/skystrife)
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

lib/fmt/:

  The cppformat library,
  Copyright 2012, Victor Zverovich
  (victor.zverovich@gmail.com)
  (https://github.com/fmtlib/fmt)
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

lib/json/:

  The JsonCpp library,
  Copyright (c) 2007-2010 Baptiste Lepilleur
  (blep@users.sourceforge.net)
  (https://github.com/open-source-parsers/jsoncpp)
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

lib/cereal:

  The cereal library,
  Copyright 2014, Randolph Voorhies, Shane Grant
  (voorhies@usc.edu, wgrant@usc.edu)
  (https://github.com/USCiLab/cereal)
  Licensed under the 3-clause BSD license
  (http://opensource.org/licenses/BSD-3-Clause)

lib/cereal/external/rapidjson:

  The RapidJSON library,
  Copyright 2011 Milo Yip
  (miloyip@gmail.com)
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

lib/sqlite:

  The SQLite library,
  dedicated to the public domain
  (http://sqlite.org/)
  (https://www.sqlite.org/copyright.html)

lib/soci:

  The SOCI library,
  Copyright 2008 Maciej Sobczak
  (maciej@msobczak.com)
  (https://github.com/SOCI/soci)
  Licensed under the Boost Software License 1.0
  (http://www.boost.org/LICENSE_1_0.txt)

lib/libsodium:

  Sodium,
  Copyright (c) 2013-2022
  (Frank Denis <j at pureftpd dot org>)
  (https://github.com/jedisct1/libsodium)
  Licensed under the ISC license
  (https://en.wikipedia.org/wiki/ISC_license)

lib/libmedida:

  The Medida library,
  Copyright 2012 Daniel Lundin
  (https://github.com/dln/medida)
  Licensed under the Apache License, Version 2.0
  (https://www.apache.org/licenses/LICENSE-2.0)

lib/libmedida/src/medida/stats/ckms.{cpp,h}

  CKMS implementation from https://github.com/jupp0r/prometheus-cpp
  Local modifications made by Hcnet Development Foundation
  Copyright 2016-2019 Jupp Mueller
  Copyright 2017-2019 Gregor Jasny
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

lib/util/uint128_t.h

  large_int implementation from https://github.com/zhanhb/int128
  Copyright (c) 2018 zhanhb
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

lib/util/lrucache.hpp

  The LRUCache libary
  Copyright 2014 Alexander Ponomarev
  (https://github.com/lamerman/cpp-lru-cache)
  Licensed under the 3-clause BSD license
  (http://opensource.org/licenses/BSD-3-Clause)

lib/util/basen.h

  The Base-n library
  Copyright 2012 Andrzej Zawadzki
  (azawadzki@gmail.com)
  (https://github.com/azawadzki/base-n)
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

lib/util/crc16.cpp

  CRC16 function
  Copyright 2001-2010 Georges Menie
  (http://www.menie.org/georges/embedded/crc16.html)
  Copyright 2010-2012 Salvatore Sanfilippo
  Licensed under the 3-clause BSD license
  (http://opensource.org/licenses/BSD-3-Clause)

lib/util/cbitset.{c,h} and cbitset_portability.h

  A simple bitset library in C
  2016-2019 Daniel Lemire (lemire@gmail.com)
  https://github.com/lemire/cbitset
  Licensed under the Apache License, Version 2.0
  (https://www.apache.org/licenses/LICENSE-2.0)

lib/util/siphash.{cpp,h}

  SipHash C++ implementation
  Copyright 2016 Isaac Whitfield
  (https://github.com/whitfin/siphash-cpp)
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

lib/util/finally.h

  "final_action" class and "finally" function
  C++ Core Guidelines Support Library
  Copyright 2015 Microsoft
  (https://github.com/Microsoft/GSL)
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

lib/tracy

  Tracy Profiler
  Copyright (c) 2017-2020, Bartosz Taudul <wolf.pld@gmail.com>
  (https://bitbucket.org/wolfpld/tracy)
  Licensed under the 3-clause BSD license.
  (https://opensource.org/licenses/BSD-3-Clause)

lib/spdlog

  Spdlog logging library
  Copyright (c) 2016 Gabi Melman <gmelman1@gmail.com>
  (https://github.com/gabime/spdlog)
  Licensed under the MIT license
  (http://opensource.org/licenses/MIT)

src/ledger/LedgerHashUtils.h

    Portion copied from fast-hash
    Copyright (C) Zilong Tan (eric.zltan@gmail.com)
    ( https://github.com/ztanml/fast-hash )
    Licensed under the MIT license
    (http://opensource.org/licenses/MIT)

lib/util/stdrandom.h

  Classes from the `libc++` standard C++ library
  Part of the LLVM Project
  (https://libcxx.llvm.org)
  Licensed under the Apache License v2.0 with LLVM Exceptions
  (https://llvm.org/LICENSE.txt)