1/* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16export interface Callback<T> { 17 (data: T): void; 18} 19 20export interface ErrorCallback<T extends Error = BusinessError> { 21 (err: T): void; 22} 23 24export interface AsyncCallback<T> { 25 (err: BusinessError, data: T): void; 26} 27 28export interface BusinessError extends Error { 29 code: number; 30} 31