Add Zeth to the nil package

- Download binary from github release
- Add to the nil package under /usr/bin

Author: akokoshn

flake.nix

@@ -28,6 +28,7 @@
       in
       rec {
         packages = rec {
+          zeth = (pkgs.callPackage ./nix/zeth.nix { });
           solc = (pkgs.callPackage ./nix/solc.nix { });
           rollup-bridge-contracts = (pkgs.callPackage ./nix/rollup-bridge-contracts.nix { });
           nil = (pkgs.callPackage ./nix/nil.nix {
@@ -155,6 +156,9 @@
                 chmod -R u+rwx,g+rx,o+rx ./usr/share/${packages.nilexplorer.name}
                 chmod -R u+rwx,g+rx,o+rx ./usr/share/${packages.docsaibackend.name}
 
+                # copy file after set permitions for /usr/bin
+                cp ${packages.zeth.outPath}/bin/zeth-ethereum ./usr/bin/zeth-ethereum
+
                 mv ./usr/bin/cometa ./usr/bin/nil-cometa
                 mv ./usr/bin/indexer ./usr/bin/nil-indexer
 

nix/zeth.nix

@@ -0,0 +1,36 @@
+{ lib
+, gccStdenv
+, fetchurl
+, pkgs
+}:
+
+let
+  pname = "zeth";
+  version = "0.1.0";
+  meta = with lib; {
+    description = "Reference tool for rexecute blocks";
+    homepage = "https://github.com/akokoshn/zeth";
+    # license = licenses.apache;
+  };
+
+  zeth =
+      gccStdenv.mkDerivation
+        rec {
+          inherit pname version meta;
+
+          executable = fetchurl {
+            url = "https://github.com/akokoshn/zeth/releases/download/dev/zeth-ethereum";
+            sha256 = "sha256-HXbw7RfiTR4+CMdryWvR/0YpaLK8fsccSxameBkJqIk=";
+          };
+
+          phases = [ "installPhase" ];
+
+          installPhase = ''
+              echo "Install Zeth"
+              mkdir -p $out/bin
+              cp ${executable} $out/bin/zeth-ethereum
+              chmod 777 $out/bin/zeth-ethereum
+          '';
+        };
+in
+zeth