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https://github.com/BlockstreamResearch/secp256k1-zkp

A fork of libsecp256k1 with support for advanced and experimental features such as Confidential Assets and MuSig2
https://github.com/BlockstreamResearch/secp256k1-zkp

bitcoin c cryptography elliptic-curves musig secp256k1 zero-knowledge

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A fork of libsecp256k1 with support for advanced and experimental features such as Confidential Assets and MuSig2

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libsecp256k1-zkp

================



![Dependencies: None](https://img.shields.io/badge/dependencies-none-success)



A fork of [libsecp256k1](https://github.com/bitcoin-core/secp256k1) with support for advanced and experimental features such as Confidential Assets and MuSig2 



Added features:

* Experimental module for ECDSA adaptor signatures.

* Experimental module for ECDSA sign-to-contract.

* Experimental module for [MuSig2](src/modules/musig/musig.md).

* Experimental module for Confidential Assets (Pedersen commitments, range proofs, and [surjection proofs](src/modules/surjection/surjection.md)).

* Experimental module for Bulletproofs++ range proofs.

* Experimental module for [address whitelisting](src/modules/whitelist/whitelist.md).



Experimental features are made available for testing and review by the community. The APIs of these features should not be considered stable.



Build steps

-----------



Building with Autotools

-----------------------



    $ ./autogen.sh

    $ ./configure

    $ make

    $ make check  # run the test suite

    $ sudo make install  # optional



To compile optional modules (such as Schnorr signatures), you need to run `./configure` with additional flags (such as `--enable-module-schnorrsig`). Run `./configure --help` to see the full list of available flags. For experimental modules, you will also need `--enable-experimental` as well as a flag for each individual module, e.g. `--enable-module-musig`.



Building with CMake (experimental)

----------------------------------



To maintain a pristine source tree, CMake encourages to perform an out-of-source build by using a separate dedicated build tree.



### Building on POSIX systems



    $ mkdir build && cd build

    $ cmake ..

    $ cmake --build .

    $ ctest  # run the test suite

    $ sudo cmake --build . --target install  # optional



To compile optional modules (such as Schnorr signatures), you need to run `cmake` with additional flags (such as `-DSECP256K1_ENABLE_MODULE_SCHNORRSIG=ON`). Run `cmake .. -LH` to see the full list of available flags.



### Cross compiling



To alleviate issues with cross compiling, preconfigured toolchain files are available in the `cmake` directory.

For example, to cross compile for Windows:



    $ cmake .. -DCMAKE_TOOLCHAIN_FILE=../cmake/x86_64-w64-mingw32.toolchain.cmake



To cross compile for Android with [NDK](https://developer.android.com/ndk/guides/cmake) (using NDK's toolchain file, and assuming the `ANDROID_NDK_ROOT` environment variable has been set):



    $ cmake .. -DCMAKE_TOOLCHAIN_FILE="${ANDROID_NDK_ROOT}/build/cmake/android.toolchain.cmake" -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=28



### Building on Windows



To build on Windows with Visual Studio, a proper [generator](https://cmake.org/cmake/help/latest/manual/cmake-generators.7.html#visual-studio-generators) must be specified for a new build tree.



The following example assumes using of Visual Studio 2022 and CMake v3.21+.



In "Developer Command Prompt for VS 2022":



    >cmake -G "Visual Studio 17 2022" -A x64 -S . -B build

    >cmake --build build --config RelWithDebInfo



Usage examples

-----------



Usage examples can be found in the [examples](examples) directory. To compile them you need to configure with `--enable-examples`.

  * [ECDSA example](examples/ecdsa.c)

  * [Schnorr signatures example](examples/schnorr.c)

  * [Deriving a shared secret (ECDH) example](examples/ecdh.c)

  * [MuSig example](examples/musig.c)



To compile the Schnorr signature, ECDH and MuSig examples, you need to enable the corresponding module by providing a flag to the `configure` script, for example `--enable-module-schnorrsig`.



Benchmark

------------

If configured with `--enable-benchmark` (which is the default), binaries for benchmarking the libsecp256k1-zkp functions will be present in the root directory after the build.



To print the benchmark result to the command line:



    $ ./bench_name



To create a CSV file for the benchmark result :



    $ ./bench_name | sed '2d;s/ \{1,\}//g' > bench_name.csv



Reporting a vulnerability

------------



See [SECURITY.md](SECURITY.md)



Contributing to libsecp256k1

------------



See [CONTRIBUTING.md](CONTRIBUTING.md)