electrum: initial expression

Electrum is a Bitcoin thin-wallet.
https://electrum.org

pkgs/applications/misc/electrum/default.nix

@@ -0,0 +1,32 @@
+{ stdenv, fetchurl, pythonPackages, slowaes, ecdsa, pyqt4 }:
+
+pythonPackages.buildPythonPackage rec {
+  name = "electrum-${version}";
+  version = "1.9.8";
+
+  src = fetchurl {
+    url = "https://download.electrum.org/Electrum-${version}.tar.gz";
+    sha256 = "8fc144a32013e4a747fea27fff981762a6b9e14cde9ffb405c4c721975d846ff";
+  };
+
+  buildInputs = [ slowaes ecdsa ];
+
+  propagatedBuildInputs = [ 
+    slowaes
+    ecdsa
+    pyqt4
+  ];
+
+  postPatch = ''
+    mkdir -p $out/share
+    sed -i 's@usr_share = .*@usr_share = os.getenv("out")+"/share"@' setup.py
+  '';
+
+  meta = {
+    description = "Bitcoin thin-wallet";
+    long-description = "Electrum is an easy to use Bitcoin client. It protects you from losing coins in a backup mistake or computer failure, because your wallet can be recovered from a secret phrase that you can write on paper or learn by heart. There is no waiting time when you start the client, because it does not download the Bitcoin blockchain.";
+    homepage = "https://electrum.org";
+    license = stdenv.lib.licenses.gpl3;
+    maintainers = [ "emery@vfemail.net" ];
+  };
+}