@firestore-emulator/server/src/error/error.ts

This package is the implementation of the Firestore emulator. It is a Node.js

import type { Status } from "@grpc/grpc-js/build/src/constants";

export class FirestoreEmulatorError extends Error {
  constructor(
    readonly code: Status,
    message: string,
  ) {
    super(message);
  }
}