RestoreObject is asynchronous？

[BlackSinny]

i want to restore file use func RestoreObject on sdk
my code like this

func AliAttachRestore() error {
	client, err := oss.New(aliendpoint, alikey, alisecret)
	if err != nil {
		return err
	}
	b, err := client.Bucket(alibucket)
	if err != nil {
		return err
	}
	//1. 先解冻
	err = b.RestoreObject(alidfsid)
	if err != nil {
		fmt.Println("restore err", err)
		fmt.Println("restore err", err.Error())
		return err
	}

	//2. 再修改存储类型为低频访问
	//StatusCode=400, ErrorCode=OperationNotSupported, ErrorMessage="The operation is not supported for this resource", RequestId=65FBF1EF6CF4DEAE7A289C1F, Ec=0016-00000702
	_, err = b.CopyObject(alidfsid, alidfsid, oss.ObjectStorageClass(oss.StorageIA))
	if err != nil {
		fmt.Println("copyObject err:", err)
		fmt.Println("copyObject err:", err.Error())
		if strings.Contains(err.Error(), "Ec=0016-00000702") {
			fmt.Println("status not allow")
			return nil
		}
		return err
	}
	
	fmt.Println("success")
	return nil
}

when first run code ,i receive err

copyObject err: oss: service returned error: StatusCode=403, ErrorCode=InvalidObjectState, ErrorMessage="The operation is not valid for the object's state", RequestId=6605418D3D849617A272A1F0, Ec=0016-00000330

• if i try immediately , receive err like this

oss: service returned error: StatusCode=409, ErrorCode=RestoreAlreadyInProgress, ErrorMessage="The restore operation is in progress.", RequestId=660541A76AA16F56DBB8031F, Ec=0016-00000701

1. so what do I do if I need to synchronize and wait to restore a file?
2. RestoreObject and CopyObject have any error code desc?