切换到 websocket 后如何从 Binance 解析数据

Question

现在我终于在 Binance 中切换到 websocket，我无法再像以前使用旧脚本那样解析响应中的数据。我正在使用 Javascript 和 Google Apps Script

function balanceBinance() {
  
  var key = '';
  var secret = '';

  var curTime = Number(new Date().getTime()).toFixed(0);
  var string = "type=SPOT&timestamp=" + curTime;
  var sKey = Utilities.computeHmacSha256Signature(string, secret);
  sKey = sKey.map(function(e) {
      var v = (e < 0 ? e + 256 : e).toString(16);
      return v.length == 1 ? "0" + v : v;
  }).join("");
  var params = {
    'type':'SPOT',
    'method': 'GET',
    'headers': {'X-MBX-APIKEY': key},
    'muteHttpExceptions': true
  };

  var url = "https://api.binance.com/sapi/v1/accountSnapshot?" + string + "&signature=" + sKey;
  var data = UrlFetchApp.fetch(url, params);
  var data = JSON.parse(data.getContentText());  
  var data = data.snapshotVos; 

Logger.log(data);
}

它returns:

[{data={totalAssetOfBtc=0.0000117, balances=[{free=0.0000117, asset=BNB, locked=0}, {asset=BTC, locked=0, free=0.00000093}, {free=0.00026, asset=BTCDOWN, locked=0}, {locked=0, free=0.00, asset=EUR}, {asset=USDT, locked=0, free=0.06716916}]}, type=spot, updateTime=1.622851199E12}, {updateTime=1.622937599E12, data={totalAssetOfBtc=0.0000117, balances=[{asset=BNB, locked=0, free=0.0000117}, {locked=0, asset=BTC, free=0.00000093}, {locked=0, free=0.00026, asset=BTCDOWN}, {locked=0, free=0.34585555, asset=EUR}, {free=0.06716916, locked=0, asset=USDT}]}, type=spot}, {type=spot, updateTime=1.623023999E12, data={balances=[{locked=0, asset=BNB, free=0.0000117}, {asset=BTC, locked=0, free=0.00000093}, {asset=BTCDOWN, locked=0, free=0.00026}, {free=0.34585555, locked=0, asset=EUR}, {free=411.06716916, locked=0, asset=USDT}], totalAssetOfBtc=0.11298258}}, {updateTime=1.623110399E12, type=spot, data={balances=[{free=0.0000117, locked=0, asset=BNB}, {asset=BTC, locked=0, free=0.00000093}, {locked=0, asset=BTCDOWN, free=0.00026}, {asset=ETHDOWN, free=0.00376, locked=0}, {free=0.34585555, asset=EUR, locked=0}, {free=0.40578148, locked=0, asset=USDT}], totalAssetOfBtc=0.0000117}}, {data={totalAssetOfBtc=0.0000117, balances=[{free=0.0000117, locked=0, asset=BNB}, {free=0.00000093, asset=BTC, locked=0}, {free=0.00026, asset=BTCDOWN, locked=0}, {free=0.00376, asset=ETHDOWN, locked=0}, {free=0.34585555, asset=EUR, locked=0}, {free=0.40578148, locked=0, asset=USDT}]}, type=spot, updateTime=1.623196799E12}]

在以前版本的脚本中，我能够使用以下代码为任何相应的 asset 提取 free 参数：

var data = data.filter(function (el) {
     return el.free > 0; 
});
  
  var i;
  for (i=0; i < data.length; i++) {
 
  var asset = data[i].asset;
  var free  = data[i].free; 
    if (free  < 1)                {var a = parseFloat(free);   var a = a.toFixed(8);   var free = parseFloat(a);} 
    if (free  > 1 && free < 10)   {var a = parseFloat(free);   var a = a.toFixed(4);   var free = parseFloat(a);}
    if (free  >=10)               {var a = parseFloat(free);   var a = a.toFixed(2);   var free = parseFloat(a);}
    
  var row=rows.indexOf(asset)+2;   
     if (row>0){
       sheet.getRange(row, 13).setValue(free);}    
  }

Answer 1

你的JSON结构是这样的

snapshotVos = [
  { data: { balances: [{asset,free}, {asset,free}] } },
  { data: { balances: [{asset,free}, {asset,free}] } },
  { data: { balances: [{asset,free}, {asset,free}] } } ]

示例代码：

function parseJson() {
  var sampleJson ={msg:'', snapshotVos:[{updateTime:1.622851199E12, data:{totalAssetOfBtc:0.10958809, balances:[{asset:'BNB', free:0.0000, locked:0}, {asset:'BTC', locked:0, free:0.00000093}, {asset:'BTCDOWN', free:0.00026, locked:0}, {free:2981.34585555, asset:'EUR', locked:0}, {free:411.06716916, asset:'USDT', locked:0}]}, type:'spot'}, {data:{balances:[{asset:'BNB', locked:0, free:0.0000117}, {asset:'BTC', locked:0, free:0.00000093}, {asset:'BTCDOWN', locked:0, free:0.00026}, {locked:0, free:2981.34585555, asset:'EUR'}, {asset:'USDT', free:411.06716916, locked:0}], totalAssetOfBtc:0.11403012}, updateTime:1.622937599E12, type:'spot'}], code:200.0}; 

  var sampleJsonStr = JSON.stringify(sampleJson);
  var data = JSON.parse(sampleJsonStr);
  var balances = []

  data.snapshotVos.forEach( snap => {
    balances.push(snap.data.balances);
  });
  Logger.log(balances);
  Logger.log(balances.flat());
  
  var data = balances.flat().filter(function (el) {
      return el.free > 0; 
  });

  Logger.log(data);
  for (i=0; i < data.length; i++) {
 
    var asset = data[i].asset;
    var free  = data[i].free; 
    Logger.log("asset: "+asset+" "+"free: "+free);
  }

}

它有什么作用？

我根据您的示例数据创建了一个 JSON 对象，使用 JSON.stringify() 将其转换为字符串，然后使用 JSON.parse( )
我将 snapshotVos array 中的所有 data.balances array 合并为一个 balances array。我使用 array.flat() 将二维数组更改为一维数组，然后根据您给定的条件对其进行过滤。
data 变量应该已经与您的 for 循环相匹配。

切换到 websocket 后如何从 Binance 解析数据

how to parse data from Binance after switching to websocket

javascript

google-sheets

websocket

google-apps-script

binance

示例代码：

它有什么作用？