leancloud数字签名问题（使用的是javascript SDK）

出现的错误显示签名失败，使用的是leancloud javascript SDK，弄了很久不知道失败的原因在哪里

var signs=getSign(0);
console.log(signs);
var signatureFactory=function (clientId){
    var signatureResult = {
        signature:signs.sign,
        timestamp:signs.timestamp,
        nonce:signs.nonce
    };
    return signatureResult;
};


var conSign=getSign(1);
var conversationSignatureFactory=function(clientId) {
    var signatureResult = {
        signature:conSign.sign,
        timestamp:conSign.timestamp,
        nonce:conSign.nonce
    };
    return signatureResult;
};


realtime.createIMClient(clientId, {
  signatureFactory: signatureFactory,
  conversationSignatureFactory:conversationSignatureFactory
}).then(function(conversation) {
  alert("a");
}).catch(function(error) {
  // 如果 signatureFactory 抛出了异常，或者签名没有验证通过，会在这里被捕获
    console.log(error);
});