How to use the blob-util.arrayBufferToBlob function in blob-util

// If we got passed the doc itself, we can check whether the attachment exists.
        (doc && !get(['_attachments', attachmentId, 'digest'])(doc))
    ) {
        return undefined
    }
    let blobOrBuffer
    try {
        blobOrBuffer = await db.getAttachment(docId, attachmentId)
    } catch (err) {
        return undefined
    }
    const contentType = get(['_attachments', attachmentId, 'content_type'])(doc)
    const isBrowser = typeof window !== 'undefined' && !window.process
    const blob = isBrowser
        ? blobOrBuffer
        : await arrayBufferToBlob(blobOrBuffer, contentType)
    const base64 = await blobToBase64String(blob)
    const dataUrl = `data:${blob.type};base64,${base64}`
    return dataUrl
}

exports.autoOrientJPEG = async attachment => {
  if (!MIME.isJPEG(attachment.contentType)) {
    return attachment;
  }

  // If we haven't downloaded the attachment yet, we won't have the data
  if (!attachment.data) {
    return attachment;
  }

  const dataBlob = await arrayBufferToBlob(
    attachment.data,
    attachment.contentType
  );
  const newDataBlob = await dataURLToBlob(await autoOrientImage(dataBlob));
  const newDataArrayBuffer = await blobToArrayBuffer(newDataBlob);

  // IMPORTANT: We overwrite the existing `data` `ArrayBuffer` losing the original
  // image data. Ideally, we’d preserve the original image data for users who want to
  // retain it but due to reports of data loss, we don’t want to overburden IndexedDB
  // by potentially doubling stored image data.
  // See: https://github.com/signalapp/Signal-Desktop/issues/1589
  const newAttachment = Object.assign({}, attachment, {
    data: newDataArrayBuffer,
    size: newDataArrayBuffer.byteLength,
  });