fix: WASM provided by nix build of barretenberg

.github/Cross.toml

@@ -8,6 +8,7 @@
 passthrough = [
     "HOME",
     "RUST_BACKTRACE",
+    "BARRETENBERG_BIN_DIR"
 ]
 volumes = [
     "HOME",

.github/workflows/nix-barretenberg.yml

@@ -0,0 +1,50 @@
+name: libbarretenberg
+
+on:
+  workflow_dispatch:
+    inputs:
+      noir-ref:
+        description: The noir reference to checkout
+        required: false
+  schedule:
+    - cron: "0 2 * * *" # run at 2 AM UTC
+  push:
+
+jobs:
+  build-barretenberg:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Noir repo
+        uses: actions/checkout@v3
+        with:
+          repository: noir-lang/noir
+          path: noir
+          ref: ${{ inputs.noir-ref || 'master' }}
+
+      - name: Collect locked barretenberg rev
+        run: |
+          echo "BB_REV=$(jq -r .nodes.barretenberg.locked.rev ./noir/flake.lock)" >> $GITHUB_ENV
+
+      - uses: cachix/install-nix-action@v20
+        with:
+          nix_path: nixpkgs=channel:nixos-22.11
+          github_access_token: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: cachix/cachix-action@v12
+        with:
+          name: barretenberg
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+
+      # Upload does not work with symlinks, using this workaround:
+      # https://github.com/actions/upload-artifact/issues/92#issuecomment-1080347032
+      - name: Build barretenberg as libbarretenberg-wasm32
+        run: |
+          nix build "git+https://github.com/AztecProtocol/barretenberg?rev=${{ env.BB_REV }}#wasm32"
+          echo "ARTIFACT_UPLOAD_PATH=$(readlink -f result)" >> $GITHUB_ENV
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: libbarretenberg-wasm32
+          path: ${{ env.ARTIFACT_UPLOAD_PATH }}
+          retention-days: 3

.github/workflows/publish-apple-darwin-wasm.yml

@@ -1,14 +1,11 @@
 name: build-apple-darwin
 
 on:
-  workflow_dispatch:
-    inputs:
-      noir-ref:
-        description: The noir reference to checkout
-        required: false
-  schedule:
-    - cron: "0 2 * * *" # run at 2 AM UTC
-  push:
+  workflow_run:
+    workflows:
+      - libbarretenberg
+    types:
+      - completed
 
 jobs:
   build-apple-darwin:
@@ -45,13 +42,23 @@ jobs:
             target/
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
 
+      # We use an unofficial download plugin to support cross-workflow downloads
+      # Ref https://github.com/actions/download-artifact/issues/172
+      - name: Download artifact
+        uses: dawidd6/action-download-artifact@v2
+        with:
+          workflow: ${{ github.event.workflow_run.workflow_id }}
+          workflow_conclusion: success
+
       - name: Setup toolchain
         uses: dtolnay/rust-toolchain@1.66.0
         with:
           targets: ${{ matrix.target }}
 
       - name: Build environment and Compile
         working-directory: noir
+        env:
+          BARRETENBERG_BIN_DIR: ${{ github.workspace }}/libbarretenberg-wasm32/bin
         run: |
           cargo build --package nargo_cli --release --target ${{ matrix.target }} --no-default-features --features plonk_bn254_wasm
 
@@ -73,7 +80,6 @@ jobs:
         if: matrix.target == 'x86_64-apple-darwin'
         run: |
           cp ./noir/target/${{ matrix.target }}/release/nargo ~/.cargo/bin/
-
           npm install
           npm test
 
@@ -91,7 +97,7 @@ jobs:
       # If we're performing a nightly build and it fails acceptance tests then raise an issue.
       - name: Alert on nightly build failure
         uses: JasonEtco/create-an-issue@v2
-        if: ${{ failure() && github.event_name == 'schedule' }} 
+        if: ${{ failure() && github.event_name == 'schedule' }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           WORKFLOW_NAME: ${{ github.workflow }}

.github/workflows/publish-linux.yml

@@ -1,14 +1,11 @@
 name: build-linux
 
 on:
-  workflow_dispatch:
-    inputs:
-      noir-ref:
-        description: The noir reference to checkout
-        required: false
-  schedule:
-    - cron: "0 2 * * *" # run at 2 AM UTC
-  push:
+  workflow_run:
+    workflows:
+      - libbarretenberg
+    types:
+      - completed
 
 env:
   CROSS_CONFIG: ${{ github.workspace }}/.github/Cross.toml
@@ -48,13 +45,24 @@ jobs:
             target/
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
 
+      # We use an unofficial download plugin to support cross-workflow downloads
+      # Ref https://github.com/actions/download-artifact/issues/172
+      - name: Download artifact
+        id: libbarretenberg-download
+        uses: dawidd6/action-download-artifact@v2
+        with:
+          workflow: ${{ github.event.workflow_run.workflow_id }}
+          workflow_conclusion: success
+
       - name: Setup toolchain
         uses: dtolnay/rust-toolchain@1.66.0
         with:
           targets: ${{ matrix.target }}
 
       - name: Build Nargo
         working-directory: noir
+        env:
+          BARRETENBERG_BIN_DIR: ${{ github.workspace }}/libbarretenberg-wasm32/bin
         run: |
           cargo install cross --force --git https://github.com/cross-rs/cross
           cross build --package nargo_cli --release --target=${{ matrix.target }} --no-default-features --features plonk_bn254_wasm
@@ -90,7 +98,7 @@ jobs:
           asset_name: nargo-${{ matrix.target }}.tar.gz
           overwrite: true
           tag: ${{ inputs.noir-ref || 'nightly' }} # This will fail if noir-ref is not a tag (e.g. testing a branch)
-      
+
       # If we're performing a nightly build and it fails acceptance tests then raise an issue.
       - name: Alert on nightly build failure
         uses: JasonEtco/create-an-issue@v2

.github/workflows/publish-x86_64-pc-windows-wasm.yml

@@ -1,16 +1,12 @@
 # such target does not exist, name choosen for convention only
 name: build-x86_64-pc-windows-wasm
-# <arch>-<vendor>-<os>-<env>
 
 on:
-  workflow_dispatch:
-    inputs:
-      noir-ref:
-        description: The noir reference to checkout
-        required: false
-  schedule:
-    - cron: "0 2 * * *" # run at 2 AM UTC
-  push:
+  workflow_run:
+    workflows:
+      - libbarretenberg
+    types:
+      - completed
 
 jobs:
   build-x86_64-pc-windows-msvc:
@@ -40,13 +36,23 @@ jobs:
             target/
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
 
+      # We use an unofficial download plugin to support cross-workflow downloads
+      # Ref https://github.com/actions/download-artifact/issues/172
+      - name: Download artifact
+        uses: dawidd6/action-download-artifact@v2
+        with:
+          workflow: ${{ github.event.workflow_run.workflow_id }}
+          workflow_conclusion: success
+
       - name: Setup toolchain
         uses: dtolnay/rust-toolchain@1.66.0
         with:
           targets: ${{ matrix.target }}
 
       - name: Build environment and Compile
         working-directory: noir
+        env:
+          BARRETENBERG_BIN_DIR: ${{ github.workspace }}/libbarretenberg-wasm32/bin
         run: |
           cargo build --package nargo_cli --release --target ${{ matrix.target }} --no-default-features --features plonk_bn254_wasm
 
@@ -82,7 +88,7 @@ jobs:
           asset_name: nargo-${{ matrix.target }}.zip
           overwrite: true
           tag: ${{ inputs.noir-ref || 'nightly' }} # This will fail if noir-ref is not a tag (e.g. testing a branch)
-      
+
       # If we're performing a nightly build and it fails acceptance tests then raise an issue.
       - name: Alert on nightly build failure
         uses: JasonEtco/create-an-issue@v2