Fix repository standardization issues

.eslintrc.js

@@ -1,28 +1,27 @@
 module.exports = {
+  root: true,
+
   env: {
-    'browser': true,
-  },
-  parserOptions: {
-    'ecmaVersion': 2018,
+    browser: true,
   },
+
   globals: {
-    'ethereum': 'readonly',
+    ethereum: 'readonly',
   },
-  plugins: [
-    'json',
-  ],
-  extends: [
-    '@metamask/eslint-config',
-    '@metamask/eslint-config/config/nodejs',
-  ],
-  overrides: [{
-    'files': ['src/*.js'],
-    'parserOptions': {
-      'sourceType': 'module',
+
+  extends: ['@metamask/eslint-config', '@metamask/eslint-config-nodejs'],
+
+  overrides: [
+    {
+      files: ['src/*.js'],
+      parserOptions: {
+        sourceType: 'module',
+      },
+      rules: {
+        camelcase: ['error'],
+      },
     },
-  }],
-  ignorePatterns: [
-    '!.eslintrc.js',
-    'dist',
   ],
-}
+
+  ignorePatterns: ['!.eslintrc.js', 'dist'],
+};

.gitignore

@@ -2,3 +2,4 @@ package-lock.json
 node_modules
 .vscode
 dist
+.eslintcache

.prettierrc.js

@@ -0,0 +1,8 @@
+// All of these are defaults except singleQuote, but we specify them
+// for explicitness
+module.exports = {
+  quoteProps: 'as-needed',
+  singleQuote: true,
+  tabWidth: 2,
+  trailingComma: 'all',
+};

.yarnrc

@@ -0,0 +1 @@
+ignore-scripts true

README.md

@@ -12,24 +12,42 @@ If you wish to use this dapp in your e2e tests, install this package and set up
 static-server node_modules/@metamask/test-dapp/dist --port 9011
 ```
 
-## Development
+## Contributing
 
-### Requires Manual Deployment
+### Setup
+
+- Install [Node.js](https://nodejs.org) version 12
+  - If you are using [nvm](https://github.com/creationix/nvm#installation) (recommended) running `nvm use` will automatically choose the right node version for you.
+- Install [Yarn v1](https://yarnpkg.com/en/docs/install)
+- Run `yarn setup` to install dependencies and run any requried post-install scripts
+  - **Warning:** Do not use the `yarn` / `yarn install` command directly. Use `yarn setup` instead. The normal install command will skip required post-install scripts, leaving your development environment in an invalid state.
+
+### Testing and Linting
+
+Run `yarn lint` to run the linter, or run `yarn lint:fix` to run the linter and fix any automatically fixable issues.
+
+This package has no tests.
+
+### Deploying
 
 After merging or pushing to `main`, please run `yarn deploy` in the package root directory if the contents of the `dist/` directory have changed.
 
-### Elements Must Be Selectable by XPath
+### Development
 
-Consider that elements must be selectable by XPath. This means that appearances can be misleading.
+#### Elements Must Be Selectable by XPath
+
+All HTML elements should be easily selectable by XPath.
+This means that appearances can be misleading.
 For example, consider this old bug:
 
 ```html
-              <button class="btn btn-primary btn-lg btn-block mb-3" id="approveTokensWithoutGas" disabled>Approve Tokens
-                Without Gas</button>
+<button
+  class="btn btn-primary btn-lg btn-block mb-3"
+  id="approveTokensWithoutGas"
+  disabled
+>
+  Approve Tokens Without Gas
+</button>
 ```
 
-This appears on the page as `Approve Tokens Without Gas`. In reality, the value included the whitespace on the second line, and caused XPath queries for the intended value to fail:
-
-```html
-Approve Tokens                Without Gas
-```
+This appears on the page as `Approve Tokens Without Gas`. In reality, the value included the whitespace on the second line, and caused XPath queries for the intended value to fail.

package.json

@@ -6,9 +6,12 @@
     "node": ">= 12.0.0"
   },
   "scripts": {
+    "setup": "yarn install && yarn allow-scripts",
     "deploy": "./deploy.sh",
-    "lint": "eslint . --ext js,json && prettier ./src -c",
-    "lint:fix": "eslint . --fix --ext js,json && prettier ./src -c --write",
+    "lint:eslint": "eslint . --cache --ext js,ts",
+    "lint:misc": "prettier '**/*.json' '**/*.md' '!CHANGELOG.md' '**/*.yml' --ignore-path .gitignore",
+    "lint": "yarn lint:eslint && yarn lint:misc --check",
+    "lint:fix": "yarn lint:eslint --fix && yarn lint:misc --write",
     "start": "webpack-dev-server",
     "build": "webpack --mode production",
     "test": "yarn lint",
@@ -32,21 +35,33 @@
   "homepage": "https://metamask.github.io/test-dapp",
   "dependencies": {},
   "devDependencies": {
-    "@metamask/eslint-config": "^4.0.0",
+    "@lavamoat/allow-scripts": "^1.0.6",
+    "@metamask/eslint-config": "^6.0.0",
+    "@metamask/eslint-config-nodejs": "^6.0.0",
     "@metamask/onboarding": "^1.0.0",
     "clean-webpack-plugin": "^3.0.0",
     "copy-webpack-plugin": "^6.0.2",
-    "eslint": "^7.7.0",
-    "eslint-plugin-import": "^2.22.0",
-    "eslint-plugin-json": "^2.0.1",
+    "eslint": "^7.29.0",
+    "eslint-config-prettier": "^8.3.0",
+    "eslint-plugin-import": "^2.23.4",
     "eslint-plugin-node": "^11.1.0",
+    "eslint-plugin-prettier": "^3.4.0",
     "eth-sig-util": "^2.5.3",
     "ethereumjs-util": "^5.1.1",
     "ethers": "^5.0.32",
     "gh-pages": "^3.1.0",
-    "prettier": "^2.0.5",
+    "prettier": "^2.3.1",
     "webpack": "^4.43.0",
     "webpack-cli": "^3.3.12",
     "webpack-dev-server": "^3.11.2"
+  },
+  "lavamoat": {
+    "allowScripts": {
+      "@lavamoat/preinstall-always-fail": false,
+      "sha3": true,
+      "secp256k1": true,
+      "keccak": true,
+      "fsevents": true
+    }
   }
 }