feat: add noirc_abi_wasm crate for ABI encoding in JS

.github/actions/setup/action.yml

@@ -0,0 +1,26 @@
+name: Setup
+
+inputs:
+  working-directory:
+    default: ./
+    required: false
+
+runs:
+  using: composite
+  steps:
+    - name: Install node
+      uses: actions/setup-node@v3
+      with:
+        node-version: 18.15
+    - name: Cache
+      uses: actions/cache@v3
+      id: cache
+      with:
+        path: "**/node_modules"
+        key: yarn-v1-${{ hashFiles('**/yarn.lock') }}
+    - name: Install
+      run: |
+        cd ${{ inputs.working-directory }}
+        yarn --immutable
+      shell: bash
+      if: steps.cache.outputs.cache-hit != 'true'

.github/workflows/abi_wasm.yml

@@ -0,0 +1,122 @@
+name: ABI Wasm test
+
+on:
+  pull_request:
+  merge_group:
+
+# This will cancel previous runs when a branch or PR is updated
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  noirc-abi-wasm-build:
+    runs-on: ubuntu-latest
+    env:
+      CACHED_PATH: /tmp/nix-cache
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+
+      - uses: cachix/install-nix-action@v20
+        with:
+          nix_path: nixpkgs=channel:nixos-23.05
+          github_access_token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Restore nix store cache
+        uses: actions/cache/restore@v3
+        id: cache
+        with:
+          path: ${{ env.CACHED_PATH }}
+          key: ${{ runner.os }}-flake-abi-wasm-${{ hashFiles('*.lock') }}
+
+      # Based on https://github.com/marigold-dev/deku/blob/b5016f0cf4bf6ac48db9111b70dd7fb49b969dfd/.github/workflows/build.yml#L26
+      - name: Copy cache into nix store
+        if: steps.cache.outputs.cache-hit == 'true'
+        # We don't check the signature because we're the one that created the cache
+        run: |
+          for narinfo in ${{ env.CACHED_PATH }}/*.narinfo; do
+            path=$(head -n 1 "$narinfo" | awk '{print $2}')
+            nix copy --no-check-sigs --from "file://${{ env.CACHED_PATH }}" "$path"
+          done
+
+      - name: Build noirc_abi_wasm
+        run: |
+          nix build -L .#noirc_abi_wasm
+
+      - name: Export cache from nix store
+        if: ${{ steps.cache.outputs.cache-hit != 'true' && github.event_name != 'merge_group' }}
+        run: |
+          nix copy --to "file://${{ env.CACHED_PATH }}?compression=zstd&parallel-compression=true" .#noirc-abi-wasm-cargo-artifacts
+
+      - uses: actions/cache/save@v3
+        # Don't create cache entries for the merge queue.
+        if: ${{ steps.cache.outputs.cache-hit != 'true' && github.event_name != 'merge_group' }}
+        with:
+          path: ${{ env.CACHED_PATH }}
+          key: ${{ steps.cache.outputs.cache-primary-key }}
+
+      - name: Dereference symlink
+        run: echo "UPLOAD_PATH=$(readlink -f result)" >> $GITHUB_ENV
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: noirc_abi_wasm
+          path: ${{ env.UPLOAD_PATH }}
+          retention-days: 10
+
+  noirc-abi-wasm-test-node:
+    needs: [noirc-abi-wasm-build]
+    name: Node.js Tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+
+      - name: Download artifact
+        uses: actions/download-artifact@v3
+        with:
+          name: noirc_abi_wasm
+          path: ./result
+
+      - name: Set up test environment
+        uses: ./.github/actions/setup
+        with:
+          working-directory: ./crates/noirc_abi_wasm
+
+      - name: Run node tests
+        working-directory: ./crates/noirc_abi_wasm
+        run: yarn test
+
+  noirc-abi-wasm-test-browser:
+    needs: [noirc-abi-wasm-build]
+    name: Browser Tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+
+      - name: Download artifact
+        uses: actions/download-artifact@v3
+        with:
+          name: noirc_abi_wasm
+          path: ./result
+
+      - name: Set up test environment
+        uses: ./.github/actions/setup
+        with:
+          working-directory: ./crates/noirc_abi_wasm
+
+      - name: Install playwright deps
+        working-directory: ./crates/noirc_abi_wasm
+        run: |
+          npx playwright install
+          npx playwright install-deps
+
+      - name: Run browser tests
+        working-directory: ./crates/noirc_abi_wasm
+        run: yarn test:browser

Cargo.toml

@@ -13,6 +13,7 @@ members = [
     "crates/fm",
     "crates/arena",
     "crates/noirc_abi",
+    "crates/noirc_abi_wasm",
     "crates/iter-extended",
     "crates/wasm",
 ]

crates/noirc_abi_wasm/.eslintignore

@@ -0,0 +1,2 @@
+node_modules
+pkg

crates/noirc_abi_wasm/.eslintrc.js

@@ -0,0 +1,19 @@
+module.exports = {
+  root: true,
+  parser: "@typescript-eslint/parser",
+  plugins: ["@typescript-eslint", "prettier"],
+  extends: ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  rules: {
+    "comma-spacing": ["error", { before: false, after: true }],
+    "no-unused-vars": "off",
+    "@typescript-eslint/no-unused-vars": [
+      "warn", // or "error"
+      {
+        argsIgnorePattern: "^_",
+        varsIgnorePattern: "^_",
+        caughtErrorsIgnorePattern: "^_",
+      },
+    ],
+    "prettier/prettier": "error",
+  },
+};

crates/noirc_abi_wasm/.gitignore

@@ -0,0 +1,8 @@
+# Yarn
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions

crates/noirc_abi_wasm/.mocharc.json

@@ -0,0 +1,5 @@
+{
+  "extension": ["ts"],
+  "spec": "test/node/**/*.test.ts",
+  "require": "ts-node/register"
+}

crates/noirc_abi_wasm/.yarnrc.yml

@@ -0,0 +1,3 @@
+yarnPath: .yarn/releases/yarn-3.5.1.cjs
+
+nodeLinker: node-modules

crates/noirc_abi_wasm/Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "noirc_abi_wasm"
+version.workspace = true
+authors.workspace = true
+edition.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+acvm.workspace = true
+noirc_abi.workspace = true
+iter-extended.workspace = true
+wasm-bindgen.workspace = true
+serde.workspace = true
+
+console_error_panic_hook = "0.1.7"
+gloo-utils = { version = "0.1", features = ["serde"] }
+
+js-sys = "0.3.62"
+
+# This is an unused dependency, we are adding it
+# so that we can enable the js feature in getrandom.
+getrandom = { version = "*", features = ["js"] }
+
+[build-dependencies]
+build-data = "0.1.3"
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.36"

crates/noirc_abi_wasm/README.md

@@ -0,0 +1,17 @@
+# Noir Lang ABI JavaScript Package
+
+This JavaScript package enables users to ABI encode inputs to a Noir program, i.e. generating an initial witness.
+
+## Building from source
+
+Outside of the [noir repo](https://github.com/noir-lang/noir), this package can be built using the command below:
+
+```bash
+nix build -L github:noir-lang/noir/master#abi_wasm
+```
+
+If you are within the noir repo and would like to build local changes, you can use:
+
+```bash
+nix build -L #abi_wasm
+```

crates/noirc_abi_wasm/build.rs

@@ -0,0 +1,14 @@
+const GIT_COMMIT: &&str = &"GIT_COMMIT";
+
+fn main() {
+    // Only use build_data if the environment variable isn't set
+    // The environment variable is always set when working via Nix
+    if std::env::var(GIT_COMMIT).is_err() {
+        build_data::set_GIT_COMMIT();
+        build_data::set_GIT_DIRTY();
+        build_data::no_debug_rebuilds();
+    }
+
+    build_data::set_SOURCE_TIMESTAMP();
+    build_data::no_debug_rebuilds();
+}

crates/noirc_abi_wasm/build.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+
+function require_command {
+    if ! command -v "$1" >/dev/null 2>&1; then
+        echo "Error: $1 is required but not installed." >&2
+        exit 1
+    fi
+}
+function check_installed {
+  if ! command -v "$1" >/dev/null 2>&1; then
+    echo "$1 is not installed. Please install it." >&2
+    return 1
+  fi
+  return 0
+}
+function run_or_fail {
+  "$@"
+  local status=$?
+  if [ $status -ne 0 ]; then
+    echo "Command '$*' failed with exit code $status" >&2
+    exit $status
+  fi
+}
+
+require_command toml2json
+require_command jq
+require_command cargo
+require_command wasm-bindgen
+require_command wasm-opt
+
+self_path=$(dirname "$(readlink -f "$0")")
+export pname=$(toml2json < ${self_path}/Cargo.toml | jq -r .package.name)
+export CARGO_TARGET_DIR=$self_path/target
+
+rm -rf $self_path/outputs >/dev/null 2>&1
+rm -rf $self_path/result >/dev/null 2>&1
+
+if [ -v out ]; then
+  echo "Will install package to $out (defined outside installPhase.sh script)"
+else
+  out="$self_path/outputs/out"
+  echo "Will install package to $out"
+fi
+
+run_or_fail ${self_path}/buildPhaseCargoCommand.sh release
+run_or_fail ${self_path}/installPhase.sh
+
+ln -s $out $self_path/result