Add C# SDK to nix dev shell

flake.nix

@@ -270,6 +270,11 @@
             "payjoin-mailroom-image" = mkContainerImage "payjoin-mailroom" packages.payjoin-mailroom tag;
           };
 
+        dotnetSdk = pkgs.dotnetCorePackages.combinePackages [
+          pkgs.dotnetCorePackages.sdk_10_0
+          pkgs.dotnetCorePackages.runtime_8_0
+        ];
+
         devShells = builtins.mapAttrs (
           _name: craneLib:
           craneLib.devShell {
@@ -281,6 +286,7 @@
                 cargo-watch
                 rust-analyzer
                 dart
+                dotnetSdk
                 cargo-fuzz
                 bzip2 # needed for some machines to have access to libzip at runtime
                 codespell
@@ -290,6 +296,8 @@
               ];
             BITCOIND_EXE = pkgs.lib.getExe' pkgs.bitcoind "bitcoind";
             BITCOIND_SKIP_DOWNLOAD = 1;
+            DOTNET_ROOT = "${dotnetSdk}/share/dotnet";
+            DOTNET_CLI_TELEMETRY_OPTOUT = "1";
           }
         ) craneLibVersions;
 

payjoin-ffi/csharp/README.md

@@ -6,6 +6,13 @@ Welcome to the C# language bindings for the [Payjoin Dev Kit](https://payjoindev
 
 Follow these steps to clone the repository and run the tests.
 
+With nix, the default development shell provides the Rust toolchain, .NET 10 SDK,
+and .NET 8 runtime:
+
+```shell
+nix develop -c bash payjoin-ffi/csharp/contrib/test.sh
+```
+
 ```shell
 git clone https://github.com/payjoin/rust-payjoin.git
 cd rust-payjoin/payjoin-ffi/csharp

payjoin-ffi/csharp/global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "8.0.100",
+    "version": "10.0.100",
     "rollForward": "latestFeature"
   }
 }