异步等待承诺类型记录未定义

Question

所以我的功能是这样的

/** @ts-ignore eslint-disable */
declare var require: any
import generateString from "./Strings/GenerateString";
var txtomp3 = require("text-to-mp3");
const fs = require("fs");

export default async function newCaptcha(length: any) {
    let captcha = generateString();
    let binary: AudioBuffer;
    let err;
    txtomp3.getMp3(captcha, async(err: any, binaryStream: any) => {
        binary = binaryStream
    })
    return new Promise((resolve, reject) => {
        resolve(binary)
    })
}

我尝试过记录binaryStream和captcha，但它们不是未定义的，而当我调用函数时，

newCaptcha({ length: 1 }).then(binaryStream => {
    console.log(binaryStream)
}).catch(e => {
    console.error(e)
})

它返回未定义的

Answer 1

将getMp3封装在承诺中似乎有效

/** @ts-ignore eslint-disable */
declare var require: any
import generateString from "./Strings/GenerateString";
var txtomp3 = require("text-to-mp3");
const fs = require("fs");

export default async function newCaptcha(length: any) {
    let captcha = generateString();
    let binary: AudioBuffer;
    let err;
    return new Promise<AudioBuffer>((resolve, reject) => {
        txtomp3.getMp3(captcha, function(err: any, binaryStream: AudioBuffer) {
            resolve(binaryStream);
        })
    })
}