tree: rename altcoins to blockchains

Signed-off-by: William Casarin <jb55@jb55.com>

pkgs/applications/blockchains/nano-wallet/CMakeLists.txt.patch

@@ -0,0 +1,13 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index b43f02f6..4470abbf 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -119,7 +119,7 @@ endif (RAIBLOCKS_SECURE_RPC)
+ 
+ include_directories (${CMAKE_SOURCE_DIR})
+ 
+-set(Boost_USE_STATIC_LIBS        ON)
++add_definitions(-DBOOST_LOG_DYN_LINK)
+ set(Boost_USE_MULTITHREADED      ON)
+ 
+ if (BOOST_CUSTOM)

pkgs/applications/blockchains/nano-wallet/default.nix

@@ -0,0 +1,57 @@
+{lib, stdenv, fetchFromGitHub, cmake, pkgconfig, boost, libGL, qtbase}:
+
+stdenv.mkDerivation rec {
+
+  name = "nano-wallet-${version}";
+  version = "18.0";
+
+  src = fetchFromGitHub {
+    owner = "nanocurrency";
+    repo = "raiblocks";
+    rev = "V${version}";
+    sha256 = "03f9g1x7rs7vic9yzsjxsh5ddx9ys78rssbfghbccfw9qrwylh3y";
+    fetchSubmodules = true;
+  };
+
+  # Use a patch to force dynamic linking
+  patches = [
+    ./CMakeLists.txt.patch
+  ];
+
+  cmakeFlags = let
+    options = {
+      BOOST_ROOT = "${boost}";
+      Boost_USE_STATIC_LIBS = "OFF";
+      RAIBLOCKS_GUI = "ON";
+      RAIBLOCKS_TEST = "ON";
+      Qt5_DIR = "${qtbase.dev}/lib/cmake/Qt5";
+      Qt5Core_DIR = "${qtbase.dev}/lib/cmake/Qt5Core";
+      Qt5Gui_INCLUDE_DIRS = "${qtbase.dev}/include/QtGui";
+      Qt5Widgets_INCLUDE_DIRS = "${qtbase.dev}/include/QtWidgets";
+    };
+    optionToFlag = name: value: "-D${name}=${value}";
+  in lib.mapAttrsToList optionToFlag options;
+
+  nativeBuildInputs = [ cmake pkgconfig ];
+  buildInputs = [ boost libGL qtbase ];
+
+  buildPhase = ''
+    make nano_wallet
+  '';
+
+  checkPhase = ''
+    ./core_test
+  '';
+
+  meta = {
+    inherit version;
+    description = "Wallet for Nano cryptocurrency";
+    homepage = https://nano.org/en/wallet/;
+    license = lib.licenses.bsd2;
+    # Fails on Darwin. See:
+    # https://github.com/NixOS/nixpkgs/pull/39295#issuecomment-386800962
+    platforms = lib.platforms.linux;
+    maintainers = with lib.maintainers; [ jluttine ];
+  };
+
+}