节点js中的while循环同步功能

Question

在此代码中，client.createTransaction()函数返回result1.txid。我想从该result1.txid运行 while循环，并在该 while循环内部，我想client.getTx()重复untill i get status == 1 or -1。在这里，我无法运行while循环。它什么也没显示

var coinPay = require('coinpayments');
var fs = require('fs');
var async = require("async");

var client = new coinPay({
  'key': 'XYZsdgdfgdf',
  'secret': 'XYZsdfsdfsd',
  'autoIpn': true
});

client.createTransaction({
    'currency1': 'LTCT',
    'currency2': 'LTCT',
    'amount': 1
  }, (err, result1) => {
    while (true) {
      client.getTx(result1.txn_id, (err, result) => {
        console.log(result);
        if (result.status == -1) {
          console.log("unsuccesful");
          return;
        } else if (result.status == 1) {
          console.log("succesful");
          return;
        } else
          console.log("checking");
      })
    }
  }
)