Handling Errors in TypeScript: Returning Custom Exceptions vs. Direct Errors

function use<T>(f: (db: DB) => Promise<T>) {
  return Effect.tryPromise({
    try: () => f(db),
    catch(error) {
      if (error instanceof postgres.PostgresError) {
        return new DbError({ pgError: error });
      }
      return new UnknownException(error);
    },
  });
}