Symbol SDK：等待事务完成引发UnhandledPromiseRejectionWarning

事务完成引发UnhandledPromiseRejectionWarning"/>

Symbol SDK：等待事务完成引发UnhandledPromiseRejectionWarning

我正在尝试使用SymbolSdk。

我尝试获取给定“ mosaic”的帐户列表的余额。

我想让代码查询区块链并在正确读取了每个用户的余额后解决承诺。

然后，我想加入所有的Promise，并在最后显示每个查询的输出。

我从symbol documentation得到了一个代码样本，展示了当从区块链接收到信息时如何触发代码。

但是它总是抛出UnhandledPromiseRejectionWarning，我找不到捕捉这些错误的方法。

我想它们来自accountHttp.getAccountInfo(userAddress)函数中的某个位置，但我无法再潜水了。

import * as SymbolSdk from 'symbol-sdk';
import { merge, of, throwError } from 'rxjs';
import { catchError } from 'rxjs/operators';

const nodeUrl = 'http://localhost:3000';

export async function userBalance(userAddress: SymbolSdk.Address, mosaicId: SymbolSdk.MosaicId): Promise<SymbolSdk.UInt64> {
    const repositoryFactory = new SymbolSdk.RepositoryFactoryHttp(nodeUrl);
    const accountHttp = repositoryFactory.createAccountRepository();
    return new Promise<SymbolSdk.UInt64>(async (resolve, reject) => {
        accountHttp.getAccountInfo(userAddress)
            .pipe(catchError((err) => { 
                const next = of(err)
                reject(err);
                return next;
            }))
            .subscribe((transactions) => {
                for (const mosaic of transactions.mosaics) {
                    // console.log(userAddress.plain(), mosaic.id.toHex(), mosaic.amount.toString());
                    if (mosaicId.equals(mosaic.id)) {
                        resolve(mosaic.amount);
                    }
                }
                resolve(new SymbolSdk.UInt64([0, 0]));
            },
            (err) => reject(err))
        });
}

if (require.main === module) {
    const promiseList = [];
    const users = ["TCC4A2H6VX4MVBYHBG33JRCL7SI4Z7OKSKUQRNXS", "TBHE2SZCMVGQTDDVSMM6G7KE33IWCXA726WXEV3H", "TBKFTBO4X5EIEHE4LDWVFALJGQU3HCVTAHN2NXCH",
    "TCWUJ4ENXWC4QYJ4N7ESVUHTBXL6IJ4TTPNFME3F", "TC2X5PCGSOEGX6TPZYTZQZYJBOP2QOPDC4VQ5GCK"];
    const rawMosaicId = "0874BB5FEAAA53C4";
    users.forEach(async (user) => {
        const promise = new Promise<[string, SymbolSdk.UInt64, SymbolSdk.MosaicId]>((resolve, reject) => {
            try {
                const address = SymbolSdk.Address.createFromRawAddress(user);
                const mosaicId = new SymbolSdk.MosaicId(rawMosaicId);
                userBalance(address, mosaicId).then((amount) => {
                    resolve([user, amount, mosaicId]);
                }).catch(reject);
            }
            catch (err) {
                reject(err);
            }
        });
        promiseList.push(promise);
    });
    Promise.allSettled(promiseList).then((values) => {
        console.log("Chain over");
        values.forEach((settled) => {
            if (settled.status === "fulfilled")
            {
                const [user, amount, mosaicId] = settled.value;
                console.log(`User ${user}, amount of ${mosaicId.toHex()}: ${amount.toString()}`);
            } else {
                console.log(`Failed to get balance, reason: ${settled.reason}`);
            }
        });
    }).catch(console.error);
}

这是我得到的输出示例：

(node:30500) UnhandledPromiseRejectionWarning: HttpError: HTTP request failed
    at Request._callback (/home/my_user/my_projects/my_symbol_project/node_modules/symbol-openapi-typescript-node-client/dist/api/nodeRoutesApi.js:168:40)
    at Request.self.callback (/home/my_user/my_projects/my_symbol_project/node_modules/request/request.js:185:22)
    at Request.emit (events.js:315:20)
    at Request.<anonymous> (/home/my_user/my_projects/my_symbol_project/node_modules/request/request.js:1154:10)
    at Request.emit (events.js:315:20)
    at IncomingMessage.<anonymous> (/home/my_user/my_projects/my_symbol_project/node_modules/request/request.js:1076:12)
    at Object.onceWrapper (events.js:421:28)
    at IncomingMessage.emit (events.js:327:22)
    at endReadableNT (_stream_readable.js:1225:12)
    at processTicksAndRejections (internal/process/task_queues.js:84:21)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:30500) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see .html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:30500) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:30500) UnhandledPromiseRejectionWarning: HttpError: HTTP request failed
    at Request._callback (/home/my_user/my_projects/my_symbol_project/node_modules/symbol-openapi-typescript-node-client/dist/api/nodeRoutesApi.js:168:40)
    at Request.self.callback (/home/my_user/my_projects/my_symbol_project/node_modules/request/request.js:185:22)
    at Request.emit (events.js:315:20)
    at Request.<anonymous> (/home/my_user/my_projects/my_symbol_project/node_modules/request/request.js:1154:10)
    at Request.emit (events.js:315:20)
    at IncomingMessage.<anonymous> (/home/my_user/my_projects/my_symbol_project/node_modules/request/request.js:1076:12)
    at Object.onceWrapper (events.js:421:28)
    at IncomingMessage.emit (events.js:327:22)
    at endReadableNT (_stream_readable.js:1225:12)
    at processTicksAndRejections (internal/process/task_queues.js:84:21)
(node:30500) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see .html#cli_unhandled_rejections_mode). (rejection id: 2)
Chain over
User TCC4A2H6VX4MVBYHBG33JRCL7SI4Z7OKSKUQRNXS, amount of 0874BB5FEAAA53C4:  0
User TBHE2SZCMVGQTDDVSMM6G7KE33IWCXA726WXEV3H, amount of 0874BB5FEAAA53C4:  169489
User TBKFTBO4X5EIEHE4LDWVFALJGQU3HCVTAHN2NXCH, amount of 0874BB5FEAAA53C4:  177213
User TCWUJ4ENXWC4QYJ4N7ESVUHTBXL6IJ4TTPNFME3F, amount of 0874BB5FEAAA53C4:  180560
User TC2X5PCGSOEGX6TPZYTZQZYJBOP2QOPDC4VQ5GCK, amount of 0874BB5FEAAA53C4:  6472738

但是它不断抛出UnhandledPromiseRejectionWarning，我无法找到捕获这些错误的方法。

这里是如何导致此错误的示例

window.addEventListener("unhandledrejection", event => {
  console.warn(`UNHANDLED PROMISE REJECTION: ${event.reason}`);
});

(async _ => {
    throw new Error('from await/async');
})();

new Promise((resolve, reject) => reject('from promise'));