Split Bls into per-type files; generate G1/G2 from a shared template

.github/CODEOWNERS

@@ -1 +1,4 @@
+# Code owners are automatically requested for review on every pull request.
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
 * @Marchhill

.github/workflows/test.yml

@@ -119,6 +119,28 @@ jobs:
           retention-days: ${{ env.RETENTION }}
           if-no-files-found: error
 
+  verify-generated:
+    name: Verify generated code and formatting
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out blst-bindings repository
+        uses: actions/checkout@v5
+
+      - name: Set up .NET
+        uses: actions/setup-dotnet@v5
+
+      - name: Regenerate point group bindings
+        run: dotnet run --project src/Nethermind.Crypto.Bls.Gen
+
+      # stage first so newly generated (untracked) files are also compared
+      - name: Check for drift
+        run: |
+          git add -A
+          git diff --cached --exit-code
+
+      - name: Verify formatting
+        run: dotnet format whitespace src/Nethermind.Crypto.Bls.slnx --verify-no-changes
+
   test:
     name: Test
     needs: [build-linux, build-macos, build-windows]

README.md

@@ -18,3 +18,10 @@ Run the benchmarks (optionally filtered by class, e.g. `--filter '*MsmBenchmarks
 ```sh
 dotnet run --project src/Nethermind.Crypto.Bls.Bench -c release
 ```
+
+`Bls.G1.cs` and `Bls.G2.cs` are generated from a shared template. To change them, edit
+`src/Nethermind.Crypto.Bls.Gen/PointGroup.template` and regenerate (CI verifies they match):
+
+```sh
+dotnet run --project src/Nethermind.Crypto.Bls.Gen
+```

src/Nethermind.Crypto.Bls.Gen/Nethermind.Crypto.Bls.Gen.csproj

@@ -0,0 +1,6 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+</Project>