secp256k1

Pure Haskell Schnorr, ECDSA on the elliptic curve secp256k1 (docs.ppad.tech/secp256k1).
git clone git://git.ppad.tech/secp256k1.git
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flake.nix (1901B)

      1 {
      2   description = "Pure Haskell Schnorr, ECDSA on secp256k1";
      3 
      4   inputs = {
      5     ppad-sha256 = {
      6       type = "git";
      7       url  = "git://git.ppad.tech/sha256.git";
      8       ref  = "master";
      9     };
     10     ppad-hmac-drbg = {
     11       type = "git";
     12       url  = "git://git.ppad.tech/hmac-drbg.git";
     13       ref  = "master";
     14     };
     15     flake-utils.follows = "ppad-sha256/flake-utils";
     16     nixpkgs.follows = "ppad-sha256/nixpkgs";
     17   };
     18 
     19   outputs = { self, nixpkgs, flake-utils, ppad-sha256, ppad-hmac-drbg }:
     20     flake-utils.lib.eachDefaultSystem (system:
     21       let
     22         lib = "ppad-secp256k1";
     23 
     24         pkgs = import nixpkgs { inherit system; };
     25         hlib = pkgs.haskell.lib;
     26 
     27         sha256 = ppad-sha256.packages.${system}.default;
     28         hmac-drbg = ppad-hmac-drbg.packages.${system}.default;
     29 
     30         hpkgs = pkgs.haskell.packages.ghc981.extend (new: old: {
     31           ppad-sha256 = sha256;
     32           ppad-hmac-drbg = hmac-drbg;
     33           ${lib} = new.callCabal2nix lib ./. {
     34             ppad-sha256 = new.ppad-sha256;
     35             ppad-hmac-drbg = new.ppad-hmac-drbg;
     36           };
     37         });
     38 
     39         cc    = pkgs.stdenv.cc;
     40         ghc   = hpkgs.ghc;
     41         cabal = hpkgs.cabal-install;
     42       in
     43         {
     44           packages.default = hpkgs.${lib};
     45 
     46           devShells.default = hpkgs.shellFor {
     47             packages = p: [
     48               (hlib.doBenchmark p.${lib})
     49             ];
     50 
     51             buildInputs = [
     52               cabal
     53               cc
     54             ];
     55 
     56             inputsFrom = builtins.attrValues self.packages.${system};
     57 
     58             doBenchmark = true;
     59 
     60             shellHook = ''
     61               PS1="[${lib}] \w$ "
     62               echo "entering ${system} shell, using"
     63               echo "cc:    $(${cc}/bin/cc --version)"
     64               echo "ghc:   $(${ghc}/bin/ghc --version)"
     65               echo "cabal: $(${cabal}/bin/cabal --version)"
     66             '';
     67           };
     68         }
     69       );
     70 }
     71