Licences and Credits
Last updated 3 November 2026
Hiili's own code is proprietary. It includes the open source software below, and we are grateful to its authors. The game and website were developed with help from AI tools, as the game's credits page shows.
In the game
| Software | Used for | Copyright | Licence |
|---|---|---|---|
| ENet 1.3.18 (modified) | Networking | © 2002-2024 Lee Salzman | MIT |
| GLFW | Windows and input | © 2002-2006 Marcus Geelnard, © 2006-2019 Camilla Löwy | zlib |
| GLM | Mathematics | © 2005 G-Truc Creation | MIT |
| stb_image | Loading images | © 2017 Sean Barrett | MIT |
| tinygltf | glTF models | © 2017 Syoyo Fujita, Aurélien Chatelain and many contributors | MIT |
| JSON for Modern C++ | JSON, within tinygltf | © 2013-2022 Niels Lohmann | MIT |
| tinyobjloader | OBJ models | © 2012-2019 Syoyo Fujita and many contributors | MIT |
| libsecp256k1 | Wallet signatures | © 2013 Pieter Wuille | MIT |
| Monocypher | Wallet encryption | © 2017-2019 Loup Vaillant | BSD-2-Clause |
| BLAKE3 | Wallet hashing | The BLAKE3 authors | CC0 1.0 |
| Argon2 | Wallet password hashing | © 2015 Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, Samuel Neves | CC0 1.0 |
| htnwallet (HTND), adapted | Wallet logic | © 2024-2025 Hoosat Oy, © 2018-2024 The kaspanet developers, © 2013-2018 The btcsuite developers, © 2015-2016 The Decred developers | ISC |
| BIP-39 English word list | Wallet recovery phrases | The BIP-39 authors | As published in the BIP-39 specification |
Recording video uses FFmpeg, if you have installed it yourself. It is not included with Hiili.
On this website
| Font | Copyright | Licence |
|---|---|---|
| Inter | © 2020 The Inter Project Authors | SIL Open Font License 1.1 |
| Rubik | © 2015 The Rubik Project Authors | |
| Press Start 2P | © 2012 The Press Start 2P Project Authors, with Reserved Font Name "Press Start 2P" |
Licence texts
MIT
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
zlib
This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution.
BSD-2-Clause
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ISC
Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.