chore(contracts): Add formatting with prettier-plugin-solidity

.prettierrc.js

 module.exports = {
-  "$schema": "http://json.schemastore.org/prettierrc",
-  "trailingComma": "es5",
-  "tabWidth": 2,
-  "semi": false,
-  "singleQuote": true,
-  "arrowParens": "always"
-};
+  $schema: 'http://json.schemastore.org/prettierrc',
+  trailingComma: 'es5',
+  tabWidth: 2,
+  semi: false,
+  singleQuote: true,
+  arrowParens: 'always',
+  overrides: [
+    {
+      files: '*.sol',
+      options: {
+        // These options are native to Prettier.
+        printWidth: 100,
+        tabWidth: 4,
+        useTabs: false,
+        singleQuote: false,
+        bracketSpacing: false,
+        // These options are specific to the Solidity Plugin
+        explicitTypes: 'always',
+        compiler: '0.8.9',
+      },
+    },
+  ],
+}

package.json

@@ -36,6 +36,7 @@
     "lerna": "^4.0.0",
     "patch-package": "^6.4.7",
     "prettier": "^2.3.1",
+    "prettier-plugin-solidity": "^1.0.0-beta.18",
     "typescript": "^4.3.5"
   },
   "scripts": {

packages/contracts/.prettierignore

+contracts/L2/predeploys/WETH9.sol
+contracts/L2/predeploys/IWETH9.sol

packages/contracts/.prettierrc.js

 module.exports = {
   ...require('../../.prettierrc.js'),
-};
\ No newline at end of file
+}

packages/contracts/package.json

@@ -28,10 +28,13 @@
     "test:slither": "slither .",
     "pretest:slither": "rm -f @openzeppelin && rm -f @ens && rm -f hardhat && ln -s ../../node_modules/@openzeppelin @openzeppelin && ln -s ../../node_modules/@ens @ens && ln -s ../../node_modules/hardhat hardhat",
     "posttest:slither": "rm -f @openzeppelin && rm -f @ens && rm -f hardhat",
+    "lint:typescript:check": "eslint .",
+    "lint:contracts:check": "yarn solhint -f table 'contracts/**/*.sol'",
+    "lint:check": "yarn lint:contracts:check && yarn lint:typescript:check",
     "lint": "yarn lint:check",
-    "lint:check": "eslint .",
-    "lint:fix": "yarn lint:check --fix",
-    "lint:contracts": "yarn solhint -f table contracts/**/*.sol",
+    "lint:typescript:fix": "eslint --fix .",
+    "lint:contracts:fix": "yarn prettier --write 'contracts/**/*.sol'",
+    "lint:fix": "yarn lint:contracts:fix && yarn lint:typescript:fix",
     "clean": "rm -rf ./dist ./artifacts ./cache ./tsconfig.build.tsbuildinfo",
     "deploy": "ts-node bin/deploy.ts && yarn autogen:markdown",
     "prepublishOnly": "yarn copyfiles -u 1 -e \"**/test-*/**/*\" \"contracts/**/*\" ./",
@@ -71,12 +74,10 @@
     "directory-tree": "^2.2.7",
     "dotenv": "^10.0.0",
     "eslint": "^7.27.0",
-    "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-ban": "^1.5.2",
     "eslint-plugin-import": "^2.23.4",
     "eslint-plugin-jsdoc": "^35.1.2",
     "eslint-plugin-prefer-arrow": "^1.2.3",
-    "eslint-plugin-prettier": "^3.4.0",
     "eslint-plugin-react": "^7.24.0",
     "eslint-plugin-unicorn": "^32.0.1",
     "ethereum-waffle": "^3.3.0",