if err != nil {
			return opts, fmt.Errorf("Unable to parse %s, failed with %w", xhttp.MinIOSourceMTime, err)
		}
	}
	retaintimeStr := strings.TrimSpace(hdr.Get(xhttp.MinIOSourceObjectRetentionTimestamp))
	var retaintimestmp time.Time
	if retaintimeStr != "" {
		retaintimestmp, err = time.Parse(time.RFC3339, retaintimeStr)
		if err != nil {

	// When an upload exceeds encryptBufferThreshold ...
	encryptBufferThreshold = 1 << 20
	// add an input buffer of this size.
	encryptBufferSize = 1 << 20

	// minCompressibleSize is the minimum size at which we enable compression.
	minCompressibleSize = 4096
)

// setHeadGetRespHeaders - set any requested parameters as response headers.
func setHeadGetRespHeaders(w http.ResponseWriter, reqParams url.Values) {

		md5hex = "" // Do not try to verify the content.
		sha256hex = ""
	}

	var forceMD5 []byte
	// Optimization: If SSE-KMS and SSE-C did not request Content-Md5. Use uuid as etag. Optionally enable this also
	// for server that is started with `--no-compat`.
	if !etag.ContentMD5Requested(r.Header) && (crypto.S3KMS.IsEncrypted(mi.UserDefined) || crypto.SSEC.IsRequested(r.Header) || !globalServerCtxt.StrictS3Compat) {

	if _, err := er.CopyObject(ctx, bucket, object, bucket, object, oi, ObjectOptions{
		VersionID: oi.VersionID,
	}, ObjectOptions{
		VersionID: oi.VersionID,
	}); err != nil {
		storageLogIf(ctx, fmt.Errorf("Unable to update transition restore metadata for %s/%s(%s): %s", bucket, object, oi.VersionID, err))
		return err
	}
	return nil
}