Can't create KuCoin order with Google App Scripts - google-apps-script

Question

I can get account details so my authentication appears correct but in trying to modify that code to create an order it returns a code 401 "msg":"Invalid KC-API-SIGN". The modification involved adding in the method and payload and changing endpoint (/api/vi/accounts) to endpoint2 (/api/v1/orders)
function kucoinTest5()
{
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("xxxxx");
var key = sheet.getRange("xx").getValue()
var secret = sheet.getRange("xx").getValue();
var passphrase = sheet.getRange("xx").getValue();
var host = 'https://openapi-sandbox.kucoin.com';
//var endpoint ='/api/v1/accounts';
var endpoint2 ='/api/v1/orders';
var timestamp = ''+ new Date().getTime();
var strForSign = timestamp + 'GET' + endpoint2;
var signature = Utilities.computeHmacSignature(Utilities.MacAlgorithm.HMAC_SHA_256, strForSign, secret);
var encodedPass = Utilities.computeHmacSignature(Utilities.MacAlgorithm.HMAC_SHA_256, passphrase, secret);
var url= host + endpoint2
var requestOptions = {
'method': "POST",
'headers': {
'KC-API-KEY': key,
'KC-API-TIMESTAMP': timestamp,
'KC-API-SIGN': Utilities.base64Encode(signature),
'KC-API-KEY-VERSION': '2',
'KC-API-PASSPHRASE': Utilities.base64Encode(encodedPass),
},
'payload': {
'clientOid': 'test1',
'side': 'buy',
'symbol': 'BTC-USDT',
'type': 'market',
'tradeType': 'TRADE',
'funds': 100
},
muteHTTPExceptions: true,
};
var httpRequest= UrlFetchApp.fetch(url, requestOptions);
//var getContext= httpRequest.getContentText();
Logger.log(httpRequest);
}

Answer 1

Solved above problem here is the code to post a buy order on KuCoin:
function kuCoinTest5()
{
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("xxxx");
var key = sheet.getRange("xx").getValue()
var secret = sheet.getRange("xx").getValue();
var passphrase = sheet.getRange("xx").getValue();
var payload = {
'clientOid':"UUID",
'side':"buy",
'symbol':"BTC-USDT",
'type':"market",
'tradeType':"TRADE",
'funds':"100"
};
var data = JSON.stringify(payload);
//Logger.log(data);
var host = 'https://openapi-sandbox.kucoin.com';
var timeStamp = ''+ new Date().getTime();
//var nowStr = "" + nowDate;
var endpoint ='/api/v1/accounts';
var endpoint2 ='/api/v1/orders';
var strForSign = timeStamp + "POST" + endpoint2 + data;
//Logger.log(strForSign);
var signature = Utilities.computeHmacSignature(Utilities.MacAlgorithm.HMAC_SHA_256, strForSign, secret);
var encodedPass = Utilities.computeHmacSignature(Utilities.MacAlgorithm.HMAC_SHA_256, passphrase, secret);
var url= host + endpoint2;
//Logger.log(url);
var options = {
"method":"POST",
'headers' : {
'KC-API-KEY': key,
'KC-API-TIMESTAMP': timeStamp,
'KC-API-SIGN': Utilities.base64Encode(signature),
'KC-API-KEY-VERSION': '2',
'KC-API-PASSPHRASE': Utilities.base64Encode(encodedPass)
},
"contentType":"application/json",
"payload":data,
//'payload' : {'clientOid':"45234524625",
//'side':"buy",
//'symbol':"BTC-USDT",
//'type':"market",
//'tradeType':"TRADE",
//'funds':"100"},
"muteHttpExceptions":true,
}
var result = UrlFetchApp.getRequest(url, options);
Logger.log(result) // a better way to debug
var result = UrlFetchApp.fetch(url, options); // works perfectly in my case
Logger.log(result)
}

Answer 2

I had the same problem with a GET request, and finally solved thanks to the above code. Here is my code:
function KuCoinRequest(){
var key ='xx'
var secret = 'xx'
var passphrase = 'xx'
var url = "https://api-futures.kucoin.com/"; //endpoint
var timestamp = '' + Number(new Date().getTime()).toFixed(0);
var command = "GET";
var endpoint = "api/v1/fills"
var str_to_sign = timestamp + command +"/" + endpoint;
var signature = Utilities.computeHmacSignature(Utilities.MacAlgorithm.HMAC_SHA_256, str_to_sign, secret)
var encodedPass = Utilities.computeHmacSignature(Utilities.MacAlgorithm.HMAC_SHA_256, passphrase, secret);
var params = {
'method': "GET",
'headers' : {
'KC-API-SIGN': Utilities.base64Encode(signature),
'KC-API-KEY': key,
'KC-API-TIMESTAMP': timestamp,
'KC-API-PASSPHRASE': Utilities.base64Encode(encodedPass),
'KC-API-KEY-VERSION': '2',
'muteHttpExceptions': true
}
};
query = url + endpoint;
var data = UrlFetchApp.fetch(query, params);
Logger.log(data.getContentText());
printJsonKucoin(data, endpoint);
return data;
}