Buy order

[mfizz1]

I know its not directly related but I am struggling to use your methods to place a buy order I have replaced body with

var body = JSON.stringify({ price: '1.0', size: '1.0', side: 'buy', product_id: 'BTC-USD' })

and method with POST and requestURL with /orders keeps coming back with error 400 invalid signature

[obixmt]

I just spent 4 days on this same issue before finally succeeding, I feel your pain. I believe the issue is in how the function UrlFetchApp.fetch() options are bundled. Here is some of my code, specifically java uses 'payload' not 'body'! Put your info in the myAuth() function first.

I spent FOREVER looking for a piece of code like this, hope it helps!

function myAuth(){
  var vAuth = {
    API_key:'<your_key>',
    API_secret:'<your_secret>',
    API_passphrase:'<your_passphase>',
    API_baseurl:'https://api.gdax.com'};
  
  return vAuth;
}


function postOrder(vOrder) {
  var vMethod = 'POST';
  var vPath = '/orders';

  var vBody = JSON.stringify({
    'price': vOrder.price, 
    'size': vOrder.size, 
    'side': vOrder.side, 
    'type': vOrder.type, 
    'product_id': vOrder.product_id});
  
  var vParams = getAuth(vMethod, vPath, vBody);
  
  var vResp = UrlFetchApp.fetch(vParams.url, vParams.options);
  if (vResp.getResponseCode() == 200) {
    var json = JSON.parse(vResp.getContentText());
    Logger.log(json);
  }
}


function getAuth(vMethod, vPath, vBody){
  var vAuth = myAuth(); // Function returns array containing authentication info.

  var vTimeStamp = Math.floor(new Date().getTime()/1000).toString();

  var vMsg = vTimeStamp + vMethod + vPath + vBody;
  var vSecret = CryptoJS.enc.Base64.parse(vAuth.API_secret);  // decode secret
  var vHash64 = CryptoJS.HmacSHA256(vMsg, vSecret);  // create hash
  var vSignature = vHash64.toString(CryptoJS.enc.Base64);  // encode signature
 
// This is where the problem usually is!
  var vParams = {
    'method': vMethod,
    'headers': {
      'CB-ACCESS-TIMESTAMP': vTimeStamp, 
      'CB-ACCESS-SIGN': vSignature, 
      'CB-ACCESS-PASSPHRASE': vAuth.API_passphrase,
      'CB-ACCESS-KEY': vAuth.API_key},
    'payload': vBody,
    'contentType': 'application/json'};

  return { 'url': vAuth.API_baseurl + vPath, 'options': vParams};
}

// Call the function however you like...
postOrder({'price':'100.0', 'size': '0.1', 'side': 'buy', 'type': 'limit', 'product_id': 'LTC-USD' });