updated the project to use yarn version 4

.gitignore

@@ -0,0 +1,12 @@
+node_modules
+
+# ide
+.idea
+.vscode
+
+# yarn
+yarn-error.log
+.yarn/
+
+# OS
+.DS_Store

.yarnrc.yml

@@ -0,0 +1,2 @@
+nodeLinker: node-modules
+enableScripts: false

build/action.yml

@@ -4,35 +4,39 @@ inputs:
   node-version:
     description: 'Node.js version'
     default: '22.x'
+  os:
+    description: 'OS name'
+    default: 'ubuntu-latest'
 runs:
   using: 'composite'
   steps:
     - name: Checkout
       uses: actions/checkout@v4
 
+    - name: Enable Corepack
+      if: ${{ startsWith(inputs.os, 'windows') }}
+      shell: bash
+      run: corepack enable --install-directory 'C:\npm\prefix'
+
+    - name: Enable Corepack
+      if: ${{ !startsWith(inputs.os, 'windows') }}
+      shell: bash
+      run: corepack enable
+
     - name: Setup Node.js
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v5
       with:
         node-version: ${{ inputs.node-version }}
-
-    - name: Cache Yarn
-      uses: actions/cache@v3
-      with:
-        path: |
-          ~/.cache/yarn
-          node_modules
-        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-yarn-
+        cache: "yarn"
 
     - name: Install dependencies
       shell: bash
-      run: yarn install --frozen-lockfile
+      run: yarn install --immutable --check-cache --check-resolutions
 
     - name: Run tests
       shell: bash
-      run: yarn test
+      run: yarn run test
 
     - name: Build
       shell: bash
-      run: yarn build
+      run: yarn run build

lint/action.yml

@@ -4,31 +4,35 @@ inputs:
   node-version:
     description: 'Node.js version'
     default: '22.x'
+  os:
+    description: 'OS name'
+    default: 'ubuntu-latest'
 runs:
   using: 'composite'
   steps:
     - name: Checkout
       uses: actions/checkout@v4
 
+    - name: Enable Corepack
+      if: ${{ startsWith(inputs.os, 'windows') }}
+      shell: bash
+      run: corepack enable --install-directory 'C:\npm\prefix'
+
+    - name: Enable Corepack
+      if: ${{ !startsWith(inputs.os, 'windows') }}
+      shell: bash
+      run: corepack enable
+
     - name: Setup Node.js
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v5
       with:
         node-version: ${{ inputs.node-version }}
-
-    - name: Cache Yarn
-      uses: actions/cache@v3
-      with:
-        path: |
-          ~/.cache/yarn
-          node_modules
-        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-yarn-
+        cache: "yarn"
 
     - name: Install dependencies
       shell: bash
-      run: yarn install --frozen-lockfile
+      run: yarn install --immutable --check-cache --check-resolutions
 
     - name: Run lint
       shell: bash
-      run: yarn lint
+      run: yarn run lint

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@ton/toolchain",
-  "version": "1.5.0",
+  "version": "1.6.0",
   "description": "Toolchain for development",
   "author": "TonTech",
   "license": "MIT",
@@ -25,7 +25,6 @@
     "lint:fix": "eslint . --fix",
     "test": "yarn lint"
   },
-  "packageManager": "yarn@1.22.22+sha512.a6b2f7906b721bba3d67d4aff083df04dad64c399707841b7acf00f6b133b7ac24255f2652fa22ae3534329dc6180534e98d17432037ff6fd140556e2bb3137e",
   "dependencies": {
     "@eslint/js": "^9.27.0",
     "@typescript-eslint/eslint-plugin": "^8.32.1",
@@ -39,5 +38,6 @@
   },
   "devDependencies": {
     "typescript": "^5.8.3"
-  }
+  },
+  "packageManager": "yarn@4.9.2+sha512.1fc009bc09d13cfd0e19efa44cbfc2b9cf6ca61482725eb35bbc5e257e093ebf4130db6dfe15d604ff4b79efd8e1e8e99b25fa7d0a6197c9f9826358d4d65c3c"
 }