.eslintrc.json

{
  "env": {
    "node": true
  },
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "project": "./tsconfig.test.json"
  },
  "ignorePatterns": ["build", "jest.config.js", "src/protobuf/*.ts"],
  "plugins": ["@typescript-eslint"],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:@typescript-eslint/recommended-requiring-type-checking",
    "prettier"
  ],
  "rules": {
    "@typescript-eslint/no-empty-function": [
      "error",
      { "allow": ["constructors", "arrowFunctions"] }
    ],
    "@typescript-eslint/explicit-function-return-type": [
      "error",
      { "allowExpressions": true, "allowHigherOrderFunctions": true }
    ],
    "@typescript-eslint/prefer-nullish-coalescing": "error",
    "@typescript-eslint/prefer-optional-chain": "error"
  }
}