pyln-proto: add copy of base58 2.1.0

pkgs/python-packages/default.nix

@@ -24,6 +24,9 @@ in {
 
   ## Specific versions of packages that already exist in nixpkgs
 
+  # base58 2.1.0, required by pyln-proto
+  base58 = callPackage ./specific-versions/base58.nix {};
+
   # cryptography 3.3.2, required by joinmarketdaemon
   cryptography = callPackage ./specific-versions/cryptography {};
   cryptography_vectors = callPackage ./specific-versions/cryptography/vectors.nix {};

pkgs/python-packages/specific-versions/base58.nix

@@ -0,0 +1,34 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pyhamcrest
+, pytest-benchmark
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "base58";
+  version = "2.1.0";
+  disabled = pythonOlder "3.5";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-FxpUe0o8YeGuOAciSm967HXjZMQ5XnViZJ1zNXaAAaI=";
+  };
+
+  checkInputs = [
+    pyhamcrest
+    pytest-benchmark
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [ "base58" ];
+
+  meta = with lib; {
+    description = "Base58 and Base58Check implementation";
+    homepage = "https://github.com/keis/base58";
+    license = licenses.mit;
+    maintainers = with maintainers; [ nyanloutre ];
+  };
+}