newMultipartUpload := objectAPI.NewMultipartUpload

	res, err := newMultipartUpload(ctx, bucket, object, opts)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	response := generateInitiateMultipartUploadResponse(bucket, object, res.UploadID)
	if res.ChecksumAlgo != "" {
		w.Header().Set(xhttp.AmzChecksumAlgo, res.ChecksumAlgo)
		if res.ChecksumType != "" {

		}
		pReader := NewPutObjReader(hashReader)
		_, err = er.PutObject(ctx, bucket, object, pReader, ropts)
		return setRestoreHeaderFn(oi, toObjectErr(err, bucket, object))
	}

	res, err := er.NewMultipartUpload(ctx, bucket, object, ropts)
	if err != nil {
		return setRestoreHeaderFn(oi, err)
	}

	var uploadedParts []CompletePart
	var rs *HTTPRangeSpec