Updated README and added build script for CI

.github/workflows/tests.yml

@@ -22,11 +22,7 @@ jobs:
       - name: Preparing rocksdb library
         run: scripts/ci/build_rocksdb.sh
       - name: Install wasm-opt
-        run: |
-          mkdir binaryen
-          curl -L https://github.com/WebAssembly/binaryen/releases/download/version_110/binaryen-version_110-x86_64-linux.tar.gz | tar -xz -C binaryen
-          cp binaryen/binaryen-version_110/bin/* /usr/local/bin
-          rm -rf binaryen
+        run: scripts/ci/install-wasm-opt.sh
       - name: Build contracts
         run: cargo make build-contracts
       - name: Test contracts
@@ -61,6 +57,8 @@ jobs:
           cache-util restore aurora-engine-target@modexp@${{ hashFiles('**/Cargo.lock') }}:target
       - name: Preparing rocksdb library
         run: scripts/ci/build_rocksdb.sh
+      - name: Install wasm-opt
+        run: scripts/ci/install-wasm-opt.sh
       - name: Test mainnet bench-modexp
         run: cargo make --profile mainnet bench-modexp
       - name: Test testnet bench-modexp

README.md

@@ -27,6 +27,7 @@ documentation.
 
 - Node.js (v14+)
 - cargo-make
+- wasm-opt (<= v110)
 
 ```sh
 cargo install --force cargo-make
@@ -37,6 +38,27 @@ cargo install --force cargo-make
 - Node.js (v14+)
 - Docker
 - cargo-make
+- wasm-opt (<= v110)
+
+### Prerequisite wasm-opt
+
+For WebAssembly optimization we use `wasm-opt`.
+The supported version of [Binaryen toolchain for WebAssembly](https://github.com/WebAssembly/binaryen)
+is `<= v110`. A higher version is not supported.
+
+We recommend installing the release:
+https://github.com/WebAssembly/binaryen/releases/tag/version_110
+
+`wasm-opt` command should be available for the build process.
+
+Verify version:
+
+```bash
+$ wasm-opt --version
+wasm-opt version 110 (version_110)
+```
+
+Please keep in mind, that `wasm-opt` runs automatically when you run `cargo make build-*` and `cargo make test` commands.
 
 ## Development
 
@@ -125,6 +147,20 @@ here:
 cargo make check
 ```
 
+#### Running WebAssembly optimization
+
+In common cases, you don't need to run `wasm-opt` manually, because
+it's part of builds and tests.
+
+But for development reasons only you can run:
+- `wasm-opt` , runs WebAssembly optimization for pre-build wasm files for specific profile. Requires a
+  `--profile` argument.
+
+For example, the following will run wasm-opt for pre-build mainnet binary:
+```sh
+cargo make --profile mainnet wasm-opt 
+```
+
 #### Cleanup
 
 To clean up the workspace, the following tasks are available:

scripts/ci/install-wasm-opt.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+if [[ ! -f wasm-opt ]]; then
+  mkdir binaryen
+  curl -L https://github.com/WebAssembly/binaryen/releases/download/version_110/binaryen-version_110-x86_64-linux.tar.gz | tar -xz -C binaryen
+  cp binaryen/binaryen-version_110/bin/* /usr/local/bin
+  rm -rf binaryen
+fi