return checkPreconditionsPUT(ctx, w, r, oi, opts)
		}
	}

	checksumType := hash.NewChecksumHeader(r.Header)
	if checksumType.Is(hash.ChecksumInvalid) {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidChecksum), r.URL)
		return
	} else if checksumType.IsSet() && !checksumType.Is(hash.ChecksumTrailing) {
		opts.WantChecksum = &hash.Checksum{Type: checksumType}
	}

	if opts.WantChecksum != nil {

	var buffer []byte
	switch size := data.Size(); {
	case size == 0:
		buffer = make([]byte, 1) // Allocate at least a byte to reach EOF
	case size >= fi.Erasure.BlockSize:
		buffer = globalBytePoolCap.Load().Get()
		defer globalBytePoolCap.Load().Put(buffer)
	case size < fi.Erasure.BlockSize:
		// No need to allocate fully blockSizeV1 buffer if the incoming data is smaller.

		var targetSize int64

		switch {
		case isDstCompressed:
			targetSize = -1
		case !isSourceEncrypted && !isTargetEncrypted:
			targetSize, _ = srcInfo.GetActualSize()
		case isSourceEncrypted && isTargetEncrypted:
			objInfo := ObjectInfo{Size: actualSize}
			targetSize = objInfo.EncryptedSize()
		case !isSourceEncrypted && isTargetEncrypted:
			targetSize = srcInfo.EncryptedSize()

					PartNumber: part.PartNumber,
				}
			}
			wantCS := map[string]string{
				hash.ChecksumCRC32.String():     part.ChecksumCRC32,
				hash.ChecksumCRC32C.String():    part.ChecksumCRC32C,
				hash.ChecksumSHA1.String():      part.ChecksumSHA1,
				hash.ChecksumSHA256.String():    part.ChecksumSHA256,
				hash.ChecksumCRC64NVME.String(): part.ChecksumCRC64NVME,
			}
			if wantCS[checksumType.String()] != crc {

	Transition          TransitionOptions
	Expiration          ExpirationOptions
	LifecycleAuditEvent lcAuditEvent

	WantChecksum *hash.Checksum // x-amz-checksum-XXX checksum sent to PutObject/ CompleteMultipartUpload.

	WantServerSideChecksumType hash.ChecksumType // if set, we compute a server-side checksum of this type

	NoDecryption                        bool      // indicates if the stream must be decrypted.