How to upload a PDF file to uploadthing from a route.ts file

export async function uploadFileToProfile(
  pdfBuffer: Uint8Array<ArrayBufferLike>,
  uniqueMetadataId: string,
) {
  const { userId } = await auth();

  if (!userId) {
    return {
      success: false,
      error: "Unauthorized",
    };
  }

  const blob = new Blob([pdfBuffer]);
  const file = new File([blob], `${uniqueMetadataId}.pdf`);

  const result = await utapi.uploadFiles(file);