Improve performance

.babel-register

@@ -0,0 +1,16 @@
+/*
+  See
+    https://github.com/babel/babel/issues/8652
+    https://github.com/babel/babel/pull/6027
+  Babel isn't currently configured by default to read .ts files and
+  can only be configured to do so via cli or configuration below.
+
+  This file is used by mocha to interpret test files using a properly
+  configured babel.
+
+  This can (probably) be removed in babel 8.x.
+*/
+require('@babel/register')({
+  extensions: ['.ts'],
+  ignore: ['node_modules'],
+})

.babelrc

@@ -0,0 +1,22 @@
+{
+  "presets": [
+    [
+      "@babel/env",
+      {
+        "targets": {
+          "node": "10.4",
+          "browsers": ">1%, not ie 11"
+        },
+        "exclude": [
+          "transform-regenerator"
+        ]
+      }
+    ],
+    "@babel/typescript"
+  ],
+  "plugins": [
+    "@babel/proposal-class-properties",
+    "@babel/proposal-object-rest-spread",
+    "@babel/plugin-syntax-bigint"
+  ]
+}

.eslintrc.js

@@ -0,0 +1,134 @@
+const path = require('path');
+
+module.exports = {
+  root: true,
+  env: {
+    browser: true,
+    es6: true,
+    node: true,
+    mocha: true
+  },
+  globals: {
+    BigInt: true,
+  },
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    ecmaVersion: 10,
+    project: "./tsconfig.json"
+  },
+  plugins: [
+    "@typescript-eslint",
+    "eslint-plugin-import",
+    "eslint-plugin-node",
+    "no-only-tests",
+    "prettier"
+  ],
+  extends: [
+    "eslint:recommended",
+    "plugin:import/errors",
+    "plugin:import/warnings",
+    "plugin:import/typescript",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  // settings: {
+  //   "import/resolver": {
+  //     "@mpetrunic/eslint-import-resolver-lerna": {
+  //       packages: path.resolve(__dirname, "packages")
+  //     }
+  //   }
+  // },
+  rules: {
+    "prettier/prettier": "error",
+    //doesnt work, it reports false errors
+    "constructor-super": "off",
+    "@typescript-eslint/naming-convention": ["error",
+    {selector: "default", format: ['camelCase']},
+    {selector: ["classProperty", "objectLiteralProperty", "classMethod", "parameter"], format: ['camelCase'], leadingUnderscore: "allow"},
+    //variable must be in camel or upper case
+    {selector: "variable", format: ["camelCase", "UPPER_CASE"], leadingUnderscore: "allow"},
+    //classes and types must be in PascalCase
+    {selector: ["typeLike", "enum"], format: ['PascalCase']},
+    {selector: "enumMember", format: null},
+    //interface must start with I
+    {selector: "interface", format: ['PascalCase'], prefix: ["I"]},
+    //ignore rule for quoted stuff
+    {
+      selector: [
+        "classProperty",
+        "objectLiteralProperty",
+        "typeProperty",
+        "classMethod",
+        "objectLiteralMethod",
+        "typeMethod",
+        "accessor",
+        "enumMember"
+      ],
+      format: null,
+      modifiers: ["requiresQuotes"]
+    },
+    //ignore rules on destructured params
+    {
+      selector: "variable",
+      modifiers: ["destructured"],
+      format: null
+    }
+  ],
+    "@typescript-eslint/explicit-function-return-type": ["error", {
+      "allowExpressions": true
+    }],
+    "@typescript-eslint/func-call-spacing": "error",
+    "@typescript-eslint/member-ordering": "error",
+    "@typescript-eslint/no-explicit-any": "error",
+    "@typescript-eslint/no-require-imports": "error",
+    "@typescript-eslint/no-unused-vars": ["error", {
+      "varsIgnorePattern": "^_"
+    }],
+    "@typescript-eslint/ban-ts-comment": "warn",
+    "@typescript-eslint/no-use-before-define": "off",
+    "@typescript-eslint/semi": "error",
+    "@typescript-eslint/type-annotation-spacing": "error",
+    "@typescript-eslint/no-floating-promises": "error",
+    "import/no-extraneous-dependencies": ["error", {
+      "devDependencies": false,
+      "optionalDependencies": false,
+      "peerDependencies": false
+    }],
+    "func-call-spacing": "off",
+    //if --fix is run it messes imports like /lib/presets/minimal & /lib/presets/mainnet
+    "import/no-duplicates": "off",
+    "node/no-deprecated-api": "error",
+    "new-parens": "error",
+    "no-caller": "error",
+    "no-bitwise": "off",
+    "no-cond-assign": "error",
+    "no-consecutive-blank-lines": 0,
+    "no-console": "warn",
+    "no-var": "error",
+    "object-curly-spacing": ["error", "never"],
+    "object-literal-sort-keys": 0,
+    "no-prototype-builtins": 0,
+    "prefer-const": "error",
+    "quotes": ["error", "double"],
+    "semi": "off",
+
+    // Prevents accidentally pushing a commit with .only in Mocha tests
+    "no-only-tests/no-only-tests": "error"
+  },
+  "overrides": [
+    {
+      "files": ["**/test/**/*.ts"],
+      "rules": {
+        "import/no-extraneous-dependencies": "off",
+        "@typescript-eslint/no-explicit-any": "off"
+      }
+    },
+    {
+      "files": ["**/lodestar-types/**/*.ts"],
+      "rules": {
+        "@typescript-eslint/naming-convention": ["off", {
+          selector: "interface", prefix: ["I"]
+        }],
+      }
+    }
+  ]
+};

.github/FUNDING.yml

@@ -0,0 +1 @@
+custom: https://gitcoin.co/grants/79/lodestar-eth20-client

.github/workflows/test.yml

@@ -0,0 +1,18 @@
+name: CI Tests
+
+on: [pull_request, push]
+
+jobs:
+  lint:
+    name: Quick tests
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Bootstrap
+      run: yarn
+    - name: Check types
+      run: yarn check-types
+    - name: Lint
+      run: yarn lint
+    - name: Tests
+      run: yarn test

.gitignore

@@ -1,2 +1,6 @@
-node_modules
-dist
+.nyc_output/
+coverage/
+dist/
+lib/
+node_modules/
+.idea/

.prettierrc.js

@@ -0,0 +1,11 @@
+module.exports = {
+  printWidth: 120,
+  tabWidth: 2,
+  useTabs: false,
+  semi: true,
+  singleQuote: false,
+  quoteProps: "as-needed",
+  trailingComma: "es5",
+  bracketSpacing: false,
+  arrowParens: "always",
+};

.vscode/launch.json

@@ -0,0 +1,31 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "runtimeVersion": "12.10.0",
+      "name": "Mocha Current File",
+      "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
+      "args": [
+          "-r",
+          "ts-node/register",
+          "--require",
+          "source-map-support/register",
+          "--timeout",
+          "999999",
+          "--colors",
+          "${file}"
+      ],
+      "env": {
+        "TS_NODE_PROJECT": "${workspaceFolder}/tsconfig.json"
+      },
+      "sourceMaps": true,
+      "console": "integratedTerminal",
+      "internalConsoleOptions": "neverOpen"
+  }
+  ]
+}

package.json

@@ -4,9 +4,18 @@
   "description": "Persistent data structures for TypeScript.",
   "main": "index.ts",
   "scripts": {
-    "lint": "eslint src/**",
-    "test": "jest",
-    "prettier:check": "prettier --parser typescript --list-different \"src/**/*.{ts,tsx}\""
+    "build": "yarn build-lib && yarn build-types",
+    "build-lib": "babel src -x .ts -d lib --source-maps",
+    "build-types": "tsc --incremental --declaration --outDir lib --emitDeclarationOnly",
+    "check-types": "tsc --noEmit",
+    "clean": "rm -rf lib && rm -rf dist && rm -f tsconfig.tsbuildinfo",
+    "lint": "eslint --color --ext .ts src/ test/",
+    "lint:fix": "yarn run lint --fix",
+    "prepublishOnly": "yarn build",
+    "pretest": "yarn check-types",
+    "test": "yarn test:unit",
+    "test:unit": "nyc -e .ts mocha --colors -r ts-node/register \"test/unit/**/*.test.ts\"",
+    "test:perf": "mocha --colors -r ts-node/register 'test/perf/**/*.test.ts'"
   },
   "repository": {
     "type": "git",
@@ -24,15 +33,30 @@
   },
   "homepage": "https://github.com/cronokirby/persistent-ts#readme",
   "devDependencies": {
-    "@types/jest": "^24.0.13",
-    "@typescript-eslint/eslint-plugin": "^1.10.2",
-    "@typescript-eslint/parser": "^1.10.2",
-    "eslint": "^5.16.0",
+    "@babel/cli": "^7.8.4",
+    "@babel/core": "^7.8.4",
+    "@babel/plugin-proposal-class-properties": "^7.8.3",
+    "@babel/plugin-proposal-object-rest-spread": "^7.8.3",
+    "@babel/plugin-syntax-bigint": "^7.8.3",
+    "@babel/preset-env": "^7.8.4",
+    "@babel/preset-typescript": "^7.8.3",
+    "@babel/register": "^7.8.3",
+    "@typescript-eslint/eslint-plugin": "4.9.0",
+    "@typescript-eslint/parser": "4.9.0",
+    "ts-node": "^9.0.0",
+    "eslint": "^7.14.0",
+    "eslint-plugin-import": "^2.22.1",
+    "eslint-plugin-no-only-tests": "^2.4.0",
+    "eslint-plugin-node": "^11.1.0",
+    "eslint-plugin-prettier": "^3.1.4",
     "fast-check": "^1.15.1",
-    "jest": "^24.8.0",
-    "prettier": "^1.18.2",
-    "ts-jest": "^24.0.2",
-    "typescript": "^3.5.1"
+    "prettier": "^2.0.5",
+    "mocha": "^8.1.1",
+    "@types/mocha": "^8.0.3",
+    "chai": "^4.2.0",
+    "@types/node": "^12.12.21",
+    "typescript": "^3.8.3",
+    "nyc": "^15.0.0"
   },
   "jest": {
     "transform": {