txt: ## dist_zef-knarkhov-Bitcoin-Core-Secp256k1.md
  # Raku binding to optimized C library for ECDSA
  
  Raku binding to optimized C library for ECDSA signatures and secret/public key operations on curve secp256k1.
  
  ## Synopsys
  
  ```
  my $data = {
      key => '6fcc37ea5e9e09fec6c83e5fbd7a745e3eee81d16ebd861c9e66f55518c19798',
      msg => '1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8'
  };
  
  my $secp256k1 = Bitcoin::Core::Secp256k1.new;
  my $signature = $secp256k1.ecdsa_sign(:privkey($data<key>), :msg($data<msg>));
  
  $signature.gist.say;
  
  ```
  
  ## Further work
  
  For now `Bitcoin::Core::Secp256k1` module does not cover full `secp256k1` API in C, so I'm working on this and will deliver complete binding ASAP.
  
  ## License
  
  Module `Bitcoin::Core::Secp256k1` is free and open source software, so you can redistribute it and/or modify it under the terms of the [The Artistic License 2.0](https://opensource.org/licenses/Artistic-2.0).
  
  ## Credits
  
  1. <https://github.com/bitcoin-core/secp256k1>
  2. `secp256k1` C API: <https://github.com/bitcoin-core/secp256k1/blob/master/include/secp256k1.h>
  
  ## Author
  
  Please contact me via [Matrix](https://matrix.to/#/@k.narkhov:matrix.org) or [LinkedIn](https://www.linkedin.com/in/knarkhov/). Your feedback is welcome at [narkhov.pro](https://narkhov.pro/contact-information.html).
  