chore: move to yarn

.gitattributes

@@ -0,0 +1,4 @@
+/.yarn/**            linguist-vendored
+/.yarn/releases/*    binary
+/.yarn/plugins/**/*  binary
+/.pnp.*              binary linguist-generated

.gitignore

@@ -1,19 +1,21 @@
-/.idea
+.idea/
+.yarn/
+
+node_modules/
+coverage/
 
-/node_modules
-/coverage
 coverage.json
 
-/typechain
-/typechain-types
+typechain/
+typechain-types/
 
 # Hardhat files
-/cache
-/artifacts
+cache/
+artifacts/
 
 # foundry artifacts
-/foundry/cache
-/foundry/out
+foundry/cache/
+foundry/out/
 
 .env
 deployed-local.json

.husky/commit-msg

@@ -1 +1 @@
-pnpm commitlint --edit ${1}
+yarn commitlint --edit ${1}

.husky/pre-commit

@@ -1 +1 @@
-pnpm lint-staged
+yarn lint-staged

.prettierignore

@@ -1 +1,6 @@
-pnpm-lock.yaml
+foundry
+
+.gitignore
+.prettierignore
+
+package-lock.json

.solcover.js

@@ -13,7 +13,7 @@ module.exports = {
     "0.8.9/interfaces",
     "0.8.9/test_helpers",
     // Skip contracts that are tested by Foundry tests
-    "common/lib", /** 100% covered by test/common/*.t.sol */
-    "0.8.9/lib/UnstructuredStorage.sol", /** 100% covered by test/0.8.9/unstructuredStorage.t.sol */
+    "common/lib", // 100% covered by test/common/*.t.sol
+    "0.8.9/lib/UnstructuredStorage.sol", // 100% covered by test/0.8.9/unstructuredStorage.t.sol
   ],
 };

.yarnrc.yml

@@ -0,0 +1 @@
+nodeLinker: node-modules

CONTRIBUTING.md

@@ -29,7 +29,7 @@ If you have a bigger idea on how to improve the protocol, consider publishing yo
 ### Requirements
 
 - [Node.js v20](https://nodejs.org/en)
-- [Pnpm](https://pnpm.io/)
+- [Yarn](https://yarnpkg.com/)
 - [Foundry](https://book.getfoundry.sh/)
 
 ### Setup
@@ -39,15 +39,15 @@ If you have a bigger idea on how to improve the protocol, consider publishing yo
 Install dependencies
 
 ```bash
-pnpm install
+yarn install
 ```
 
 ### Test
 
 Run Hardhat tests
 
 ```bash
-pnpm test
+yarn test
 ```
 
 See `package.json` for more commands.
@@ -125,7 +125,7 @@ All typechain types are placed in `/typechain-types` in the root of the project.
 There have been issues with IDEs failing to properly index this directory resulting in import errors. If you are experiencing similar issues, the solutions above should resolve them:
 
 - open the `/typechain-types/index.ts` file to force the IDE to index it;
-- delete the directory and re-compile `pnpm hardhat compile --force`.
+- delete the directory and re-compile `yarn hardhat compile --force`.
 
 ### Config files
 

package.json

@@ -4,23 +4,24 @@
   "description": "Lido on Ethereum is a liquid-staking protocol allowing anyone to earn staking rewards without locking ether or maintaining infrastructure",
   "license": "GPL-3.0-only",
   "engines": {
-    "node": ">=20",
-    "pnpm": ">=8"
+    "node": ">=20"
   },
+  "packageManager": "[email protected]",
   "scripts": {
-    "compile": "pnpm hardhat compile",
+    "compile": "hardhat compile",
     "lint:sol": "solhint 'contracts/**/*.sol'",
-    "lint:sol:fix": "pnpm lint:sol --fix",
+    "lint:sol:fix": "yarn lint:sol --fix",
     "lint:ts": "eslint . --ignore-path .gitignore --max-warnings=0",
-    "lint:ts:fix": "pnpm lint:ts --fix",
-    "lint": "pnpm lint:sol && pnpm lint:ts",
-    "format": "prettier . --write --ignore-path .gitignore --ignore-path .prettierignore",
-    "test": "pnpm hardhat test --parallel",
-    "test:single": "pnpm hardhat test",
-    "test:coverage": "pnpm hardhat coverage",
-    "test:trace": "pnpm hardhat test --trace",
-    "test:watch": "pnpm hardhat watch test",
-    "type:check": "tsc --noEmit",
+    "lint:ts:fix": "yarn lint:ts --fix",
+    "lint": "yarn lint:sol && yarn lint:ts",
+    "format": "prettier . --write",
+    "test:forge": "forge test",
+    "test": "hardhat test --parallel",
+    "test:sequential": "hardhat test",
+    "test:coverage": "hardhat coverage",
+    "test:trace": "hardhat test --trace",
+    "test:watch": "hardhat watch test",
+    "typecheck": "tsc --noEmit",
     "prepare": "husky"
   },
   "lint-staged": {
@@ -36,9 +37,12 @@
     "@commitlint/config-conventional": "^19.2.2",
     "@nomicfoundation/hardhat-chai-matchers": "^2.0.6",
     "@nomicfoundation/hardhat-ethers": "^3.0.5",
+    "@nomicfoundation/hardhat-ignition": "^0.15.1",
+    "@nomicfoundation/hardhat-ignition-ethers": "^0.15.1",
     "@nomicfoundation/hardhat-network-helpers": "^1.0.10",
     "@nomicfoundation/hardhat-toolbox": "^5.0.0",
     "@nomicfoundation/hardhat-verify": "^2.0.5",
+    "@nomicfoundation/ignition-core": "^0.15.1",
     "@typechain/ethers-v6": "^0.5.1",
     "@typechain/hardhat": "^9.1.0",
     "@types/chai": "^4.3.14",