Bittrex private and public API for Google Apps Script (Google Sheet)

bittrex_private_and_public_api.gs

// work in progress
// you need a bittrex API key and secret with read account option enabled

// I assume that all the keys are in the "keys" spreadsheet. The key is in cell B5 and the secret in cell C5
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("keys");
var key = sheet.getRange("B5").getValue()
var secret = sheet.getRange("C5").getValue();
var baseUrl = 'https://bittrex.com/api/v1.1/';
var nonce = Math.floor(new Date().getTime()/1000);

/**
 * Used to retrieve all balances from your account.
 * @return the balance of any currency that is not 0.
 */
function bittrexGetbalances() {
  var finals = [];
  var results = bittrexPrivateRequest("account/getbalances");
  Logger.log(results)
  results.forEach(function(result,index) {
    finals.push({'currency': result.Currency, 'balance': result.Balance})
  });
  Logger.log(finals)
  return json2array_(finals);
};

/**
 * Used to retrieve the balance from your account for a specific currency.
 * @param {string} a string literal for the currency (ex: LTC).
 * @return the currency balance.
 * @customfunction
 */
function bittrexGetbalance(currency) {
 var payload = { "currency" : currency };
 var results = bittrexPrivateRequest("account/getbalance",payload);
 return results.Balance;
};


  
function bittrexPublicRequest(command,payload){
  var uri = uriCreator_(command,payload);
  var response = UrlFetchApp.fetch(uri);
  var dataAll = JSON.parse(response.getContentText());
  if (dataAll.success = true) {
    return dataAll.result
  } else {
    return dataAll.message
  } 
}

function bittrexPrivateRequest(command,payload){
  var uri = uriCreator_(command,payload,true)
  var signature = Utilities.computeHmacSignature(Utilities.MacAlgorithm.HMAC_SHA_512, uri, secret);
 
 // Signature copied from comments:
 var apisign = signature.map(function(byte) {
    return ('0' + (byte & 0xFF).toString(16)).slice(-2);
  }).join('');
 
  var headers = {
    "apisign": apisign
  }
  var params = {
    "method": "get",
    "headers": headers,
    "payload": payload
  }
  var response = UrlFetchApp.fetch(uri, params);
  var dataAll = JSON.parse(response.getContentText());
  if (dataAll.success = true) {
    return dataAll.result
  } else {
    return dataAll.message
  }   
};

function uriCreator_(command,payload,private){
  if (payload) {
    var payloadEncoded = Object.keys(payload).map(function(param) {
      return encodeURIComponent(param) + '=' + encodeURIComponent(payload[param]);
    }).join('&');
  }
  if (private) {
    uri = baseUrl.concat(command + "?apikey=" + key + "&nonce=" + nonce + "&" + payloadEncoded)
  } else {
    uri = baseUrl.concat("public/" + command + "?" + payloadEncoded)
  }
  return uri
};


function json2array_(data){
  var results = [];
  var keys = [];
  var values = [];
  for (var i in data){
    for (var key in data[i]){
      if (i == 0) keys.push(key);
      values.push(data[i][key]);
    }
    if (i == 0){
      results.push(keys);
      keys = [];
    }
    results.push(values);
    values = [];
  }
  return results;
};