feat: implement blob compression

.github/actions/rust-setup/action.yml

@@ -13,6 +13,10 @@ inputs:
     description: "Additional cache key for dependencies"
     required: false
     default: "default"
+  targets:
+    description: "Additional targets to install (e.g., thumbv7m-none-eabi)"
+    required: false
+    default: ""
 
 runs:
   using: "composite"
@@ -22,6 +26,7 @@ runs:
       with:
         toolchain: ${{ inputs.toolchain }}
         components: ${{ inputs.components }}
+        targets: ${{ inputs.targets }}
 
     - name: Install protoc
       uses: arduino/setup-protoc@v3

.github/workflows/rust-test.yml

@@ -5,21 +5,21 @@ permissions:
 on:
   pull_request:
     paths:
-      - 'client/**'
-      - 'proto/**'
-      - 'Cargo.toml'
-      - 'Cargo.lock'
-      - '.github/workflows/rust-*.yml'
+      - "client/**"
+      - "proto/**"
+      - "Cargo.toml"
+      - "Cargo.lock"
+      - ".github/workflows/rust-*.yml"
   push:
     branches:
       - main
       - release/*
     paths:
-      - 'client/**'
-      - 'proto/**'
-      - 'Cargo.toml'
-      - 'Cargo.lock'
-      - '.github/workflows/rust-*.yml'
+      - "client/**"
+      - "proto/**"
+      - "Cargo.toml"
+      - "Cargo.lock"
+      - ".github/workflows/rust-*.yml"
 
 jobs:
   test:
@@ -56,6 +56,80 @@ jobs:
           cd client/crates/client
           cargo check --examples --verbose
 
+  feature-check:
+    name: Feature Combination Check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Setup Rust
+        uses: ./.github/actions/rust-setup
+        with:
+          toolchain: stable
+          components: rustfmt, clippy
+          cache-key: features
+
+      - name: Check ev-types with no default features
+        run: |
+          cd client/crates/types
+          # Check minimal build (just protobuf, no compression or grpc)
+          cargo check --no-default-features --verbose
+
+      - name: Check ev-types with only std
+        run: |
+          cd client/crates/types
+          cargo check --no-default-features --features std --verbose
+
+      - name: Check ev-types with compression only
+        run: |
+          cd client/crates/types
+          cargo check --no-default-features --features compression --verbose
+
+      - name: Check ev-types with grpc only
+        run: |
+          cd client/crates/types
+          cargo check --no-default-features --features grpc --verbose
+
+      - name: Check ev-types with default features
+        run: |
+          cd client/crates/types
+          cargo check --verbose
+
+  no-std-check:
+    name: No-std Compatibility Check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Setup Rust
+        uses: ./.github/actions/rust-setup
+        with:
+          toolchain: stable
+          components: rustfmt, clippy
+          cache-key: no-std
+          targets: thumbv7m-none-eabi
+
+      - name: Check no_std compatibility for ev-types
+        run: |
+          cd client/crates/types
+          # Test that the crate builds for an embedded target without std
+          cargo check --no-default-features --target thumbv7m-none-eabi --verbose
+
+      - name: Check no_std with alloc
+        run: |
+          cd client/crates/types
+          # Some embedded systems have alloc but not std
+          # This verifies we can use the crate with just alloc support
+          cargo check --no-default-features --target thumbv7m-none-eabi --verbose
+
+      - name: Build for wasm32 target (another no_std target)
+        run: |
+          rustup target add wasm32-unknown-unknown
+          cd client/crates/types
+          cargo check --no-default-features --target wasm32-unknown-unknown --verbose
+
   coverage:
     name: Code Coverage
     runs-on: ubuntu-latest