text: 'use strict';
  
  // ---------------------------------------------------------------------------
  
  const Exchange = require ('./base/Exchange');
  const { ExchangeError, ArgumentsRequired, ExchangeNotAvailable, InvalidNonce, InsufficientFunds, OrderNotFound, DDoSProtection, InvalidOrder, AuthenticationError, RateLimitExceeded } = require ('./base/errors');
  
  // ---------------------------------------------------------------------------
  
  module.exports = class yobit extends Exchange {
      describe () {
          return this.deepExtend (super.describe (), {
              'id': 'yobit',
              'name': 'YoBit',
              'countries': [ 'RU' ],
              'rateLimit': 3000, // responses are cached every 2 seconds
              'version': '3',
              'has': {
                  'CORS': false,
                  'createDepositAddress': true,
                  'createMarketOrder': false,
                  'fetchClosedOrders': 'emulated',
                  'fetchDepositAddress': true,
                  'fetchDeposits': false,
                  'fetchMyTrades': true,
                  'fetchOpenOrders': true,
                  'fetchOrder': true,
                  'fetchOrderBooks': true,
                  'fetchOrders': 'emulated',
                  'fetchTickers': true,
                  'fetchTransactions': false,
                  'fetchWithdrawals': false,
                  'withdraw': true,
              },
              'urls': {
                  'logo': 'https://user-images.githubusercontent.com/1294454/27766910-cdcbfdae-5eea-11e7-9859-03fea873272d.jpg',
                  'api': {
                      'public': 'https://yobit.net/api',
                      'private': 'https://yobit.net/tapi',
                  },
                  'www': 'https://www.yobit.net',
                  'doc': 'https://www.yobit.net/en/api/',
                  'fees': 'https://www.yobit.net/en/fees/',
              },
              'api': {
                  'public': {
                      'get': [
                          'depth/{pair}',
                          'info',
                          'ticker/{pair}',
                          'trades/{pair}',
                      ],
                  },
                  'private': {
                      'post': [
                          'ActiveOrders',
                          'CancelOrder',
                          'GetDepositAddress',
                          'getInfo',
                          'OrderInfo',
                          'Trade',
                          'TradeHistory',
                          'WithdrawCoinsToAddress',
                      ],
                  },
              },
              'fees': {
                  'trading': {
                      'maker': 0.002,
                      'taker': 0.002,
                  },
                  'funding': {
                      'withdraw': {},
                  },
              },
              'commonCurrencies': {
                  'AIR': 'AirCoin',
                  'ANI': 'ANICoin',
                  'ANT': 'AntsCoin',  // what is this, a coin for ants?
                  'ATMCHA': 'ATM',
                  'ASN': 'Ascension',
                  'AST': 'Astral',
                  'ATM': 'Autumncoin',
                  'BCC': 'BCH',
                  'BCS': 'BitcoinStake',
                  'BLN': 'Bulleon',
                  'BOT': 'BOTcoin',
                  'BON': 'BONES',
                  'BPC': 'BitcoinPremium',
                  'BTS': 'Bitshares2',
                  'CAT': 'BitClave',
                  'CBC': 'CryptoBossCoin',
                  'CMT': 'CometCoin',
                  'COV': 'Coven Coin',
                  'COVX': 'COV',
                  'CPC': 'Capricoin',
                  'CS': 'CryptoSpots',
                  'DCT': 'Discount',
                  'DFT': 'DraftCoin',
                  'DGD': 'DarkGoldCoin',
                  'DIRT': 'DIRTY',
                  'DROP': 'FaucetCoin',
                  'DSH': 'DASH',
                  'EKO': 'EkoCoin',
                  'ENTER': 'ENTRC',
                  'EPC': 'ExperienceCoin',
                  'ESC': 'EdwardSnowden',
                  'EUROPE': 'EUROP',
                  'EXT': 'LifeExtension',
                  'FUNK': 'FUNKCoin',
                  'GCC': 'GlobalCryptocurrency',
                  'GEN': 'Genstake',
                  'GENE': 'Genesiscoin',
                  'GOLD': 'GoldMint',
                  'GOT': 'Giotto Coin',
                  'HTML5': 'HTML',
                  'HYPERX': 'HYPER',
                  'ICN': 'iCoin',
                  'INSANE': 'INSN',
                  'JNT': 'JointCoin',
                  'JPC': 'JupiterCoin',
                  'KNC': 'KingN Coin',
                  'LBTCX': 'LiteBitcoin',
                  'LIZI': 'LiZi',
                  'LOC': 'LocoCoin',
                  'LOCX': 'LOC',
                  'LUNYR': 'LUN',
                  'LUN': 'LunarCoin',  // they just change the ticker if it is already taken
                  'MDT': 'Midnight',
                  'NAV': 'NavajoCoin',
                  'NBT': 'NiceBytes',
                  'OMG': 'OMGame',
                  'PAC': '$PAC',
                  'PLAY': 'PlayCoin',
                  'PIVX': 'Darknet',
                  'PRS': 'PRE',
                  'PUTIN': 'PUT',
                  'STK': 'StakeCoin',
                  'SUB': 'Subscriptio',
                  'PAY': 'EPAY',
                  'PLC': 'Platin Coin',
                  'RCN': 'RCoin',
                  'REP': 'Republicoin',
                  'RUR': 'RUB',
                  'TTC': 'TittieCoin',
                  'VOL': 'VolumeCoin',
                  'XIN': 'XINCoin',
              },
              'options': {
                  // 'fetchTickersMaxLength': 2048,
                  'fetchOrdersRequiresSymbol': true,
                  'fetchTickersMaxLength': 512,
              },
              'exceptions': {
                  'exact': {
                      '803': InvalidOrder, // "Count could not be less than 0.001." (selling below minAmount)
                      '804': InvalidOrder, // "Count could not be more than 10000." (buying above maxAmount)
                      '805': InvalidOrder, // "price could not be less than X." (minPrice violation on buy & sell)
                      '806': InvalidOrder, // "price could not be more than X." (maxPrice violation on buy & sell)
                      '807': InvalidOrder, // "cost could not be less than X." (minCost violation on buy & sell)
                      '831': InsufficientFunds, // "Not enougth X to create buy order." (buying with balance.quote < order.cost)
                      '832': InsufficientFunds, // "Not enougth X to create sell order." (selling with balance.base < order.amount)
                      '833': OrderNotFound, // "Order with id X was not found." (cancelling non-existent, closed and cancelled order)
                  },
                  'broad': {
                      'Invalid pair name': ExchangeError, // {"success":0,"error":"Invalid pair name: btc_eth"}
                      'invalid api key': AuthenticationError,
                      'invalid sign': AuthenticationError,
                      'api key dont have trade permission': AuthenticationError,
                      'invalid parameter': InvalidOrder,
                      'invalid order': InvalidOrder,
                      'The given order has already been cancelled': InvalidOrder,
                      'Requests too often': DDoSProtection,
                      'not available': ExchangeNotAvailable,
                      'data unavailable': ExchangeNotAvailable,
                      'external service unavailable': ExchangeNotAvailable,
                      'Total transaction amount': InvalidOrder, // { "success": 0, "error": "Total transaction amount is less than minimal total: 0.00010000"}
                      'The given order has already been closed and cannot be cancelled': InvalidOrder,
                      'Insufficient funds': InsufficientFunds,
                      'invalid key': AuthenticationError,
                      'invalid nonce': InvalidNonce, // {"success":0,"error":"invalid nonce (has already been used)"}'
                      'Total order amount is less than minimal amount': InvalidOrder,
                      'Rate Limited': RateLimitExceeded,
                  },
              },
          });
      }
  
      async fetchBalance (params = {}) {
          await this.loadMarkets ();
          const response = await this.privatePostGetInfo (params);
          //
          //     {
          //         "success":1,
          //         "return":{
          //             "funds":{
          //                 "ltc":22,
          //                 "nvc":423.998,
          //                 "ppc":10,
          //             },
          //             "funds_incl_orders":{
          //                 "ltc":32,
          //                 "nvc":523.998,
          //                 "ppc":20,
          //             },
          //             "rights":{
          //                 "info":1,
          //                 "trade":0,
          //                 "withdraw":0
          //             },
          //             "transaction_count":0,
          //             "open_orders":1,
          //             "server_time":1418654530
          //         }
          //     }
          //
          const balances = this.safeValue (response, 'return', {});
          const result = { 'info': response };
          const free = this.safeValue (balances, 'funds', {});
          const total = this.safeValue (balances, 'funds_incl_orders', {});
          const currencyIds = Object.keys (this.extend (free, total));
          for (let i = 0; i < currencyIds.length; i++) {
              const currencyId = currencyIds[i];
              const code = this.safeCurrencyCode (currencyId);
              const account = this.account ();
              account['free'] = this.safeFloat (free, currencyId);
              account['total'] = this.safeFloat (total, currencyId);
              result[code] = account;
          }
          return this.parseBalance (result);
      }
  
      async fetchMarkets (params = {}) {
          const response = await this.publicGetInfo (params);
          const markets = this.safeValue (response, 'pairs');
          const keys = Object.keys (markets);
          const result = [];
          for (let i = 0; i < keys.length; i++) {
              const id = keys[i];
              const market = markets[id];
              const [ baseId, quoteId ] = id.split ('_');
              let base = baseId.toUpperCase ();
              let quote = quoteId.toUpperCase ();
              base = this.safeCurrencyCode (base);
              quote = this.safeCurrencyCode (quote);
              const symbol = base + '/' + quote;
              const precision = {
                  'amount': this.safeInteger (market, 'decimal_places'),
                  'price': this.safeInteger (market, 'decimal_places'),
              };
              const amountLimits = {
                  'min': this.safeFloat (market, 'min_amount'),
                  'max': this.safeFloat (market, 'max_amount'),
              };
              const priceLimits = {
                  'min': this.safeFloat (market, 'min_price'),
                  'max': this.safeFloat (market, 'max_price'),
              };
              const costLimits = {
                  'min': this.safeFloat (market, 'min_total'),
              };
              const limits = {
                  'amount': amountLimits,
                  'price': priceLimits,
                  'cost': costLimits,
              };
              const hidden = this.safeInteger (market, 'hidden');
              const active = (hidden === 0);
              result.push ({
                  'id': id,
                  'symbol': symbol,
                  'base': base,
                  'quote': quote,
                  'baseId': baseId,
                  'quoteId': quoteId,
                  'active': active,
                  'taker': market['fee'] / 100,
                  'precision': precision,
                  'limits': limits,
                  'info': market,
              });
          }
          return result;
      }
  
      async fetchOrderBook (symbol, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'pair': market['id'],
          };
          if (limit !== undefined) {
              request['limit'] = limit; // default = 150, max = 2000
          }
          const response = await this.publicGetDepthPair (this.extend (request, params));
          const market_id_in_reponse = (market['id'] in response);
          if (!market_id_in_reponse) {
              throw new ExchangeError (this.id + ' ' + market['symbol'] + ' order book is empty or not available');
          }
          const orderbook = response[market['id']];
          return this.parseOrderBook (orderbook);
      }
  
      async fetchOrderBooks (symbols = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          let ids = undefined;
          if (symbols === undefined) {
              ids = this.ids.join ('-');
              // max URL length is 2083 symbols, including http schema, hostname, tld, etc...
              if (ids.length > 2048) {
                  const numIds = this.ids.length;
                  throw new ExchangeError (this.id + ' has ' + numIds.toString () + ' symbols exceeding max URL length, you are required to specify a list of symbols in the first argument to fetchOrderBooks');
              }
          } else {
              ids = this.marketIds (symbols);
              ids = ids.join ('-');
          }
          const request = {
              'pair': ids,
              // 'ignore_invalid': true,
          };
          if (limit !== undefined) {
              request['limit'] = limit;
          }
          const response = await this.publicGetDepthPair (this.extend (request, params));
          const result = {};
          ids = Object.keys (response);
          for (let i = 0; i < ids.length; i++) {
              const id = ids[i];
              let symbol = id;
              if (id in this.markets_by_id) {
                  const market = this.markets_by_id[id];
                  symbol = market['symbol'];
              }
              result[symbol] = this.parseOrderBook (response[id]);
          }
          return result;
      }
  
      parseTicker (ticker, market = undefined) {
          //
          //   {    high: 0.03497582,
          //         low: 0.03248474,
          //         avg: 0.03373028,
          //         vol: 120.11485715062999,
          //     vol_cur: 3572.24914074,
          //        last: 0.0337611,
          //         buy: 0.0337442,
          //        sell: 0.03377798,
          //     updated: 1537522009          }
          //
          const timestamp = this.safeTimestamp (ticker, 'updated');
          let symbol = undefined;
          if (market !== undefined) {
              symbol = market['symbol'];
          }
          const last = this.safeFloat (ticker, 'last');
          return {
              'symbol': symbol,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'high': this.safeFloat (ticker, 'high'),
              'low': this.safeFloat (ticker, 'low'),
              'bid': this.safeFloat (ticker, 'buy'),
              'bidVolume': undefined,
              'ask': this.safeFloat (ticker, 'sell'),
              'askVolume': undefined,
              'vwap': undefined,
              'open': undefined,
              'close': last,
              'last': last,
              'previousClose': undefined,
              'change': undefined,
              'percentage': undefined,
              'average': this.safeFloat (ticker, 'avg'),
              'baseVolume': this.safeFloat (ticker, 'vol_cur'),
              'quoteVolume': this.safeFloat (ticker, 'vol'),
              'info': ticker,
          };
      }
  
      async fetchTickers (symbols = undefined, params = {}) {
          await this.loadMarkets ();
          let ids = this.ids;
          if (symbols === undefined) {
              const numIds = ids.length;
              ids = ids.join ('-');
              const maxLength = this.safeInteger (this.options, 'fetchTickersMaxLength', 2048);
              // max URL length is 2048 symbols, including http schema, hostname, tld, etc...
              if (ids.length > this.options['fetchTickersMaxLength']) {
                  throw new ArgumentsRequired (this.id + ' has ' + numIds.toString () + ' markets exceeding max URL length for this endpoint (' + maxLength.toString () + ' characters), please, specify a list of symbols of interest in the first argument to fetchTickers');
              }
          } else {
              ids = this.marketIds (symbols);
              ids = ids.join ('-');
          }
          const request = {
              'pair': ids,
          };
          const tickers = await this.publicGetTickerPair (this.extend (request, params));
          const result = {};
          const keys = Object.keys (tickers);
          for (let k = 0; k < keys.length; k++) {
              const id = keys[k];
              const ticker = tickers[id];
              let symbol = id;
              let market = undefined;
              if (id in this.markets_by_id) {
                  market = this.markets_by_id[id];
                  symbol = market['symbol'];
              }
              result[symbol] = this.parseTicker (ticker, market);
          }
          return result;
      }
  
      async fetchTicker (symbol, params = {}) {
          const tickers = await this.fetchTickers ([ symbol ], params);
          return tickers[symbol];
      }
  
      parseTrade (trade, market = undefined) {
          const timestamp = this.safeTimestamp (trade, 'timestamp');
          let side = this.safeString (trade, 'type');
          if (side === 'ask') {
              side = 'sell';
          } else if (side === 'bid') {
              side = 'buy';
          }
          const price = this.safeFloat2 (trade, 'rate', 'price');
          const id = this.safeString2 (trade, 'trade_id', 'tid');
          const order = this.safeString (trade, 'order_id');
          if ('pair' in trade) {
              const marketId = this.safeString (trade, 'pair');
              market = this.safeValue (this.markets_by_id, marketId, market);
          }
          let symbol = undefined;
          if (market !== undefined) {
              symbol = market['symbol'];
          }
          const amount = this.safeFloat (trade, 'amount');
          const type = 'limit'; // all trades are still limit trades
          let takerOrMaker = undefined;
          let fee = undefined;
          const feeCost = this.safeFloat (trade, 'commission');
          if (feeCost !== undefined) {
              const feeCurrencyId = this.safeString (trade, 'commissionCurrency');
              const feeCurrencyCode = this.safeCurrencyCode (feeCurrencyId);
              fee = {
                  'cost': feeCost,
                  'currency': feeCurrencyCode,
              };
          }
          const isYourOrder = this.safeValue (trade, 'is_your_order');
          if (isYourOrder !== undefined) {
              takerOrMaker = 'taker';
              if (isYourOrder) {
                  takerOrMaker = 'maker';
              }
              if (fee === undefined) {
                  fee = this.calculateFee (symbol, type, side, amount, price, takerOrMaker);
              }
          }
          let cost = undefined;
          if (amount !== undefined) {
              if (price !== undefined) {
                  cost = amount * price;
              }
          }
          return {
              'id': id,
              'order': order,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'symbol': symbol,
              'type': type,
              'side': side,
              'takerOrMaker': takerOrMaker,
              'price': price,
              'amount': amount,
              'cost': cost,
              'fee': fee,
              'info': trade,
          };
      }
  
      async fetchTrades (symbol, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'pair': market['id'],
          };
          if (limit !== undefined) {
              request['limit'] = limit;
          }
          const response = await this.publicGetTradesPair (this.extend (request, params));
          if (Array.isArray (response)) {
              const numElements = response.length;
              if (numElements === 0) {
                  return [];
              }
          }
          return this.parseTrades (response[market['id']], market, since, limit);
      }
  
      async createOrder (symbol, type, side, amount, price = undefined, params = {}) {
          if (type === 'market') {
              throw new ExchangeError (this.id + ' allows limit orders only');
          }
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'pair': market['id'],
              'type': side,
              'amount': this.amountToPrecision (symbol, amount),
              'rate': this.priceToPrecision (symbol, price),
          };
          price = parseFloat (price);
          amount = parseFloat (amount);
          const response = await this.privatePostTrade (this.extend (request, params));
          let id = undefined;
          let status = 'open';
          let filled = 0.0;
          let remaining = amount;
          if ('return' in response) {
              id = this.safeString (response['return'], 'order_id');
              if (id === '0') {
                  id = this.safeString (response['return'], 'init_order_id');
                  status = 'closed';
              }
              filled = this.safeFloat (response['return'], 'received', 0.0);
              remaining = this.safeFloat (response['return'], 'remains', amount);
          }
          const timestamp = this.milliseconds ();
          const order = {
              'id': id,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'lastTradeTimestamp': undefined,
              'status': status,
              'symbol': symbol,
              'type': type,
              'side': side,
              'price': price,
              'cost': price * filled,
              'amount': amount,
              'remaining': remaining,
              'filled': filled,
              'fee': undefined,
              // 'trades': this.parseTrades (order['trades'], market),
              'info': response,
              'clientOrderId': undefined,
              'average': undefined,
              'trades': undefined,
          };
          this.orders[id] = order;
          return order;
      }
  
      async cancelOrder (id, symbol = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {
              'order_id': parseInt (id),
          };
          const response = await this.privatePostCancelOrder (this.extend (request, params));
          if (id in this.orders) {
              this.orders[id]['status'] = 'canceled';
          }
          return response;
      }
  
      parseOrderStatus (status) {
          const statuses = {
              '0': 'open',
              '1': 'closed',
              '2': 'canceled',
              '3': 'open', // or partially-filled and canceled? https://github.com/ccxt/ccxt/issues/1594
          };
          return this.safeString (statuses, status, status);
      }
  
      parseOrder (order, market = undefined) {
          const id = this.safeString (order, 'id');
          const status = this.parseOrderStatus (this.safeString (order, 'status'));
          const timestamp = this.safeTimestamp (order, 'timestamp_created');
          let symbol = undefined;
          if (market === undefined) {
              const marketId = this.safeString (order, 'pair');
              if (marketId in this.markets_by_id) {
                  market = this.markets_by_id[marketId];
              }
          }
          if (market !== undefined) {
              symbol = market['symbol'];
          }
          const remaining = this.safeFloat (order, 'amount');
          let amount = undefined;
          const price = this.safeFloat (order, 'rate');
          let filled = undefined;
          let cost = undefined;
          if ('start_amount' in order) {
              amount = this.safeFloat (order, 'start_amount');
          } else {
              if (id in this.orders) {
                  amount = this.orders[id]['amount'];
              }
          }
          if (amount !== undefined) {
              if (remaining !== undefined) {
                  filled = amount - remaining;
                  cost = price * filled;
              }
          }
          const fee = undefined;
          const type = 'limit';
          const side = this.safeString (order, 'type');
          const result = {
              'info': order,
              'id': id,
              'clientOrderId': undefined,
              'symbol': symbol,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'lastTradeTimestamp': undefined,
              'type': type,
              'side': side,
              'price': price,
              'cost': cost,
              'amount': amount,
              'remaining': remaining,
              'filled': filled,
              'status': status,
              'fee': fee,
              'average': undefined,
              'trades': undefined,
          };
          return result;
      }
  
      parseOrders (orders, market = undefined, since = undefined, limit = undefined, params = {}) {
          const result = [];
          const ids = Object.keys (orders);
          let symbol = undefined;
          if (market !== undefined) {
              symbol = market['symbol'];
          }
          for (let i = 0; i < ids.length; i++) {
              const id = ids[i];
              const order = this.extend ({ 'id': id }, orders[id]);
              result.push (this.extend (this.parseOrder (order, market), params));
          }
          return this.filterBySymbolSinceLimit (result, symbol, since, limit);
      }
  
      async fetchOrder (id, symbol = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {
              'order_id': parseInt (id),
          };
          const response = await this.privatePostOrderInfo (this.extend (request, params));
          id = id.toString ();
          const newOrder = this.parseOrder (this.extend ({ 'id': id }, response['return'][id]));
          const oldOrder = (id in this.orders) ? this.orders[id] : {};
          this.orders[id] = this.extend (oldOrder, newOrder);
          return this.orders[id];
      }
  
      updateCachedOrders (openOrders, symbol) {
          // update local cache with open orders
          // this will add unseen orders and overwrite existing ones
          for (let j = 0; j < openOrders.length; j++) {
              const id = openOrders[j]['id'];
              this.orders[id] = openOrders[j];
          }
          const openOrdersIndexedById = this.indexBy (openOrders, 'id');
          const cachedOrderIds = Object.keys (this.orders);
          for (let k = 0; k < cachedOrderIds.length; k++) {
              // match each cached order to an order in the open orders array
              // possible reasons why a cached order may be missing in the open orders array:
              // - order was closed or canceled -> update cache
              // - symbol mismatch (e.g. cached BTC/USDT, fetched ETH/USDT) -> skip
              const cachedOrderId = cachedOrderIds[k];
              let cachedOrder = this.orders[cachedOrderId];
              if (!(cachedOrderId in openOrdersIndexedById)) {
                  // cached order is not in open orders array
                  // if we fetched orders by symbol and it doesn't match the cached order -> won't update the cached order
                  if (symbol !== undefined && symbol !== cachedOrder['symbol']) {
                      continue;
                  }
                  // cached order is absent from the list of open orders -> mark the cached order as closed
                  if (cachedOrder['status'] === 'open') {
                      cachedOrder = this.extend (cachedOrder, {
                          'status': 'closed', // likewise it might have been canceled externally (unnoticed by "us")
                          'cost': undefined,
                          'filled': cachedOrder['amount'],
                          'remaining': 0.0,
                      });
                      if (cachedOrder['cost'] === undefined) {
                          if (cachedOrder['filled'] !== undefined) {
                              cachedOrder['cost'] = cachedOrder['filled'] * cachedOrder['price'];
                          }
                      }
                      this.orders[cachedOrderId] = cachedOrder;
                  }
              }
          }
          return this.toArray (this.orders);
      }
  
      async fetchOrders (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          if (symbol === undefined) {
              throw new ArgumentsRequired (this.id + ' fetchOrders requires a symbol argument');
          }
          await this.loadMarkets ();
          const request = {};
          const market = undefined;
          if (symbol !== undefined) {
              const market = this.market (symbol);
              request['pair'] = market['id'];
          }
          const response = await this.privatePostActiveOrders (this.extend (request, params));
          // can only return 'open' orders (i.e. no way to fetch 'closed' orders)
          let openOrders = [];
          if ('return' in response) {
              openOrders = this.parseOrders (response['return'], market);
          }
          const allOrders = this.updateCachedOrders (openOrders, symbol);
          const result = this.filterBySymbol (allOrders, symbol);
          return this.filterBySinceLimit (result, since, limit);
      }
  
      async fetchOpenOrders (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          const orders = await this.fetchOrders (symbol, since, limit, params);
          return this.filterBy (orders, 'status', 'open');
      }
  
      async fetchClosedOrders (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          const orders = await this.fetchOrders (symbol, since, limit, params);
          return this.filterBy (orders, 'status', 'closed');
      }
  
      async fetchMyTrades (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          if (symbol === undefined) {
              throw new ArgumentsRequired (this.id + ' fetchMyTrades requires a `symbol` argument');
          }
          await this.loadMarkets ();
          const market = this.market (symbol);
          // some derived classes use camelcase notation for request fields
          const request = {
              // 'from': 123456789, // trade ID, from which the display starts numerical 0 (test result: liqui ignores this field)
              // 'count': 1000, // the number of trades for display numerical, default = 1000
              // 'from_id': trade ID, from which the display starts numerical 0
              // 'end_id': trade ID on which the display ends numerical ∞
              // 'order': 'ASC', // sorting, default = DESC (test result: liqui ignores this field, most recent trade always goes last)
              // 'since': 1234567890, // UTC start time, default = 0 (test result: liqui ignores this field)
              // 'end': 1234567890, // UTC end time, default = ∞ (test result: liqui ignores this field)
              'pair': market['id'],
          };
          if (limit !== undefined) {
              request['count'] = parseInt (limit);
          }
          if (since !== undefined) {
              request['since'] = parseInt (since / 1000);
          }
          const response = await this.privatePostTradeHistory (this.extend (request, params));
          const trades = this.safeValue (response, 'return', {});
          const ids = Object.keys (trades);
          const result = [];
          for (let i = 0; i < ids.length; i++) {
              const id = ids[i];
              const trade = this.parseTrade (this.extend (trades[id], {
                  'trade_id': id,
              }), market);
              result.push (trade);
          }
          return this.filterBySymbolSinceLimit (result, symbol, since, limit);
      }
  
      async createDepositAddress (code, params = {}) {
          const request = {
              'need_new': 1,
          };
          const response = await this.fetchDepositAddress (code, this.extend (request, params));
          const address = this.safeString (response, 'address');
          this.checkAddress (address);
          return {
              'currency': code,
              'address': address,
              'tag': undefined,
              'info': response['info'],
          };
      }
  
      async fetchDepositAddress (code, params = {}) {
          await this.loadMarkets ();
          const currency = this.currency (code);
          const request = {
              'coinName': currency['id'],
              'need_new': 0,
          };
          const response = await this.privatePostGetDepositAddress (this.extend (request, params));
          const address = this.safeString (response['return'], 'address');
          this.checkAddress (address);
          return {
              'currency': code,
              'address': address,
              'tag': undefined,
              'info': response,
          };
      }
  
      async withdraw (code, amount, address, tag = undefined, params = {}) {
          this.checkAddress (address);
          await this.loadMarkets ();
          const currency = this.currency (code);
          const request = {
              'coinName': currency['id'],
              'amount': amount,
              'address': address,
          };
          // no docs on the tag, yet...
          if (tag !== undefined) {
              throw new ExchangeError (this.id + ' withdraw() does not support the tag argument yet due to a lack of docs on withdrawing with tag/memo on behalf of the exchange.');
          }
          const response = await this.privatePostWithdrawCoinsToAddress (this.extend (request, params));
          return {
              'info': response,
              'id': undefined,
          };
      }
  
      calculateFee (symbol, type, side, amount, price, takerOrMaker = 'taker', params = {}) {
          const market = this.markets[symbol];
          let key = 'quote';
          const rate = market[takerOrMaker];
          let cost = parseFloat (this.costToPrecision (symbol, amount * rate));
          if (side === 'sell') {
              cost *= price;
          } else {
              key = 'base';
          }
          return {
              'type': takerOrMaker,
              'currency': market[key],
              'rate': rate,
              'cost': cost,
          };
      }
  
      sign (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
          let url = this.urls['api'][api];
          const query = this.omit (params, this.extractParams (path));
          if (api === 'private') {
              this.checkRequiredCredentials ();
              const nonce = this.nonce ();
              body = this.urlencode (this.extend ({
                  'nonce': nonce,
                  'method': path,
              }, query));
              const signature = this.hmac (this.encode (body), this.encode (this.secret), 'sha512');
              headers = {
                  'Content-Type': 'application/x-www-form-urlencoded',
                  'Key': this.apiKey,
                  'Sign': signature,
              };
          } else if (api === 'public') {
              url += '/' + this.version + '/' + this.implodeParams (path, params);
              if (Object.keys (query).length) {
                  url += '?' + this.urlencode (query);
              }
          } else {
              url += '/' + this.implodeParams (path, params);
              if (method === 'GET') {
                  if (Object.keys (query).length) {
                      url += '?' + this.urlencode (query);
                  }
              } else {
                  if (Object.keys (query).length) {
                      body = this.json (query);
                      headers = {
                          'Content-Type': 'application/json',
                      };
                  }
              }
          }
          return { 'url': url, 'method': method, 'body': body, 'headers': headers };
      }
  
      handleErrors (httpCode, reason, url, method, headers, body, response, requestHeaders, requestBody) {
          if (response === undefined) {
              return; // fallback to default error handler
          }
          if ('success' in response) {
              //
              // 1 - Liqui only returns the integer 'success' key from their private API
              //
              //     { "success": 1, ... } httpCode === 200
              //     { "success": 0, ... } httpCode === 200
              //
              // 2 - However, exchanges derived from Liqui, can return non-integers
              //
              //     It can be a numeric string
              //     { "sucesss": "1", ... }
              //     { "sucesss": "0", ... }, httpCode >= 200 (can be 403, 502, etc)
              //
              //     Or just a string
              //     { "success": "true", ... }
              //     { "success": "false", ... }, httpCode >= 200
              //
              //     Or a boolean
              //     { "success": true, ... }
              //     { "success": false, ... }, httpCode >= 200
              //
              // 3 - Oversimplified, Python PEP8 forbids comparison operator (===) of different types
              //
              // 4 - We do not want to copy-paste and duplicate the code of this handler to other exchanges derived from Liqui
              //
              // To cover points 1, 2, 3 and 4 combined this handler should work like this:
              //
              let success = this.safeValue (response, 'success', false);
              if (typeof success === 'string') {
                  if ((success === 'true') || (success === '1')) {
                      success = true;
                  } else {
                      success = false;
                  }
              }
              if (!success) {
                  const code = this.safeString (response, 'code');
                  const message = this.safeString (response, 'error');
                  const feedback = this.id + ' ' + body;
                  this.throwExactlyMatchedException (this.exceptions['exact'], code, feedback);
                  this.throwExactlyMatchedException (this.exceptions['exact'], message, feedback);
                  this.throwBroadlyMatchedException (this.exceptions['broad'], message, feedback);
                  throw new ExchangeError (feedback); // unknown message
              }
          }
      }
  };
  