NCHAIN OPEN BITCOIN SV LICENSE
Effective Date:  May 21, 2019
This license governs use of the accompanying software (the Software) provided as part of the SDK Libraries project initiated by nChain.  If you use the Software, you accept this license.  If you do not accept the license, do not use the Software.  This license applies to any person or entity that downloads, reproduces or obtains the Software on or after the Effective Date stated above.

1. Definitions

The term "contribution" is the original Software, or any additions or changes to the Software. A "contributor" is any person that distributes its contribution under this license.  "Licensed patents" are a contributor's patents or claimed patents that read directly on its contribution to the Software (but licensed patents do not include a contributors patents or claimed patents that do not read directly on its contribution to the Software.) 

2. Grant of Rights 

(A) Copyright Grant. Subject to the terms of this license, including the license conditions and limitations in section 3, each contributor grants you a non-exclusive, worldwide, royalty-free copyright license to reproduce its contribution, prepare derivative works of its contribution, and distribute its contribution or any derivative works that you create. 

(B) Patent Grant.  Subject to the terms of this license, including the license conditions and limitations in section 3, each contributor grants you a non-exclusive, worldwide, royalty-free license under its licensed patents to make, have made, use, sell, offer for sale, import, and/or otherwise dispose of its contribution in the Software or derivative works of the contribution in the Software. 

3. Conditions and Limitations 

(A) Trademarks.  If you distribute or make any other use of the Software as permitted by this license, you must:  (i) display, to end users of the Software or any applications or other works you create using the Software, a statement or identifier that your use is 'Powered by nChain's SDK Libraries libraries'; and (ii) comply with any trademark usage policy published now or in the future for the SDK Libraries project.  Except for such right to use the nChain and SDK Libraries trademarks, this license does not grant you rights to use any other contributors' name, logo, or trademarks. 
(B) If you bring a patent claim against any contributor over patents that you claim are infringed by the Software, your patent license from such contributor to the Software ends automatically. 
(C) If you distribute any portion of the Software, you must retain all copyright, patent, trademark, attribution and permission/restriction notices herein and that are present in the Software. 
(D) If you distribute any portion of the Software in source code form, you may do so only under this license by including a complete copy of this license with your distribution. If you distribute any portion of the Software in compiled or object code form, you may only do so under a license that complies with this license. 
(E) The software is licensed as-is. You bear the risk of using it. The contributors give no express warranties, guarantees or conditions. You may have additional consumer rights under your local laws which this license cannot change. To the extent permitted under your local laws, the contributors exclude the implied warranties of merchantability, fitness for a particular purpose and non-infringement.
(F)  Blockchain/Platform Limitation.  The licenses granted in sections 2(A) & 2(B) extend only to the Software or derivative works (such as applications using the Software) that you create that operate on the Bitcoin SV  blockchain.  The Bitcoin SV blockchain is defined as the Bitcoin chain containing block height #556767 with this hash: 000000000000000001d956714215d96ffc00e0afda4cd0a96c96f8d802b1662b.

TRADEMARK NOTICE
nChain is a trademark of nChain Holdings Limited.  Limited rights to use the trade mark granted by this license shall be subject to any trademark usage policy published now or in the future for the SDK Libraries project.