HarmonyOS promise调用如何进行串行调用

根据描述场景，可以通过await和Promise配合，实现同步形式完成异步调用。可以参考文档：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/async-concurrency-overview-V5#asyncawait

样例代码如下：

function sendFire(tag: string) {
  const MyPromise: Promise<string> = new Promise((onFulfilled: Function, onRejected: Function) => {
    setTimeout(() => {
      let random = Math.random()
      if (random > 0.5) {
        onFulfilled(tag + "success")
      } else {
        onRejected(tag + "failed")
      }
    }, 3000)
  })
  return MyPromise
}
async function sendAllFire() {
  try {
    let res1 = await sendFire("tag1")
    let res2 = await sendFire("tag2")
    let res3 = await sendFire("tag3")
    console.log("")
  } catch (err) {
    console.error(err)
  }
}
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