text: 'use strict';
  
  //  ---------------------------------------------------------------------------
  
  const Exchange = require ('./base/Exchange');
  const { ExchangeError, AuthenticationError, InvalidNonce, InsufficientFunds, OrderNotFound, DDoSProtection } = require ('./base/errors');
  
  //  ---------------------------------------------------------------------------
  
  module.exports = class bitz extends Exchange {
      describe () {
          return this.deepExtend (super.describe (), {
              'id': 'bitz',
              'name': 'Bit-Z',
              'countries': [ 'HK' ],
              'rateLimit': 2000,
              'version': 'v1',
              'userAgent': this.userAgents['chrome'],
              'has': {
                  'fetchTickers': true,
                  'fetchOHLCV': true,
                  'fetchOpenOrders': true,
              },
              'timeframes': {
                  '1m': '1m',
                  '5m': '5m',
                  '15m': '15m',
                  '30m': '30m',
                  '1h': '1h',
                  '1d': '1d',
              },
              'urls': {
                  'logo': 'https://user-images.githubusercontent.com/1294454/35862606-4f554f14-0b5d-11e8-957d-35058c504b6f.jpg',
                  'api': 'https://api.bit-z.com/api_v1',
                  'www': 'https://www.bit-z.com',
                  'doc': 'https://www.bit-z.com/api.html',
                  'fees': 'https://www.bit-z.com/about/fee',
              },
              'api': {
                  'public': {
                      'get': [
                          'ticker',
                          'tickerall',
                          'depth',
                          'orders',
                          'kline',
                      ],
                  },
                  'private': {
                      'post': [
                          'balances',
                          'tradeAdd',
                          'tradeCancel',
                          'openOrders',
                      ],
                  },
              },
              'fees': {
                  'trading': {
                      'maker': 0.001,
                      'taker': 0.001,
                  },
                  'funding': {
                      'withdraw': {
                          'BTC': '0.5%',
                          'DKKT': '0.5%',
                          'ETH': 0.01,
                          'USDT': '0.5%',
                          'LTC': '0.5%',
                          'FCT': '0.5%',
                          'LSK': '0.5%',
                          'HXI': '0.8%',
                          'ZEC': '0.5%',
                          'DOGE': '0.5%',
                          'MZC': '0.5%',
                          'ETC': '0.5%',
                          'GXS': '0.5%',
                          'XPM': '0.5%',
                          'PPC': '0.5%',
                          'BLK': '0.5%',
                          'XAS': '0.5%',
                          'HSR': '0.5%',
                          'NULS': 5.0,
                          'VOISE': 350.0,
                          'PAY': 1.5,
                          'EOS': 0.6,
                          'YBCT': 35.0,
                          'OMG': 0.3,
                          'OTN': 0.4,
                          'BTX': '0.5%',
                          'QTUM': '0.5%',
                          'DASH': '0.5%',
                          'GAME': '0.5%',
                          'BCH': '0.5%',
                          'GNT': 9.0,
                          'SSS': 1500.0,
                          'ARK': '0.5%',
                          'PART': '0.5%',
                          'LEO': '0.5%',
                          'DGB': '0.5%',
                          'ZSC': 130.0,
                          'VIU': 350.0,
                          'BTG': '0.5%',
                          'ARN': 10.0,
                          'VTC': '0.5%',
                          'BCD': '0.5%',
                          'TRX': 200.0,
                          'HWC': '0.5%',
                          'UNIT': '0.5%',
                          'OXY': '0.5%',
                          'MCO': 0.3500,
                          'SBTC': '0.5%',
                          'BCX': '0.5%',
                          'ETF': '0.5%',
                          'PYLNT': 0.4000,
                          'XRB': '0.5%',
                          'ETP': '0.5%',
                      },
                  },
              },
              'precision': {
                  'amount': 8,
                  'price': 8,
              },
              'options': {
                  'fetchOHLCVVolume': true,
                  'fetchOHLCVWarning': true,
                  'lastNonceTimestamp': 0,
              },
              'commonCurrencies': {
                  'XRB': 'NANO',
                  'PXC': 'Pixiecoin',
              },
          });
      }
  
      async fetchMarkets () {
          let response = await this.publicGetTickerall ();
          let markets = response['data'];
          let ids = Object.keys (markets);
          let result = [];
          for (let i = 0; i < ids.length; i++) {
              let id = ids[i];
              let market = markets[id];
              let [ baseId, quoteId ] = id.split ('_');
              let base = baseId.toUpperCase ();
              let quote = quoteId.toUpperCase ();
              base = this.commonCurrencyCode (base);
              quote = this.commonCurrencyCode (quote);
              let symbol = base + '/' + quote;
              result.push ({
                  'id': id,
                  'symbol': symbol,
                  'base': base,
                  'quote': quote,
                  'baseId': baseId,
                  'quoteId': quoteId,
                  'active': true,
                  'info': market,
              });
          }
          return result;
      }
  
      async fetchBalance (params = {}) {
          await this.loadMarkets ();
          let response = await this.privatePostBalances (params);
          let data = response['data'];
          let balances = this.omit (data, 'uid');
          let result = { 'info': response };
          let keys = Object.keys (balances);
          for (let i = 0; i < keys.length; i++) {
              let id = keys[i];
              let idHasUnderscore = (id.indexOf ('_') >= 0);
              if (!idHasUnderscore) {
                  let code = id.toUpperCase ();
                  if (id in this.currencies_by_id) {
                      code = this.currencies_by_id[id]['code'];
                  }
                  let account = this.account ();
                  let usedField = id + '_lock';
                  account['used'] = this.safeFloat (balances, usedField);
                  account['total'] = this.safeFloat (balances, id);
                  account['free'] = account['total'] - account['used'];
                  result[code] = account;
              }
          }
          return this.parseBalance (result);
      }
  
      parseTicker (ticker, market = undefined) {
          let timestamp = ticker['date'] * 1000;
          let symbol = market['symbol'];
          let 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': undefined,
              'baseVolume': this.safeFloat (ticker, 'vol'),
              'quoteVolume': undefined,
              'info': ticker,
          };
      }
  
      async fetchTicker (symbol, params = {}) {
          await this.loadMarkets ();
          let market = this.market (symbol);
          let response = await this.publicGetTicker (this.extend ({
              'coin': market['id'],
          }, params));
          return this.parseTicker (response['data'], market);
      }
  
      async fetchTickers (symbols = undefined, params = {}) {
          await this.loadMarkets ();
          let response = await this.publicGetTickerall (params);
          let tickers = response['data'];
          let result = {};
          let ids = Object.keys (tickers);
          for (let i = 0; i < ids.length; i++) {
              let id = ids[i];
              let market = this.markets_by_id[id];
              let symbol = market['symbol'];
              // they will return some rare tickers set to boolean false under their symbol key
              if (tickers[id]) {
                  result[symbol] = this.parseTicker (tickers[id], market);
              }
          }
          return result;
      }
  
      async fetchOrderBook (symbol, limit = undefined, params = {}) {
          await this.loadMarkets ();
          let response = await this.publicGetDepth (this.extend ({
              'coin': this.marketId (symbol),
          }, params));
          let orderbook = response['data'];
          let timestamp = orderbook['date'] * 1000;
          return this.parseOrderBook (orderbook, timestamp);
      }
  
      parseTrade (trade, market = undefined) {
          let hkt = this.sum (this.milliseconds (), 28800000);
          let utcDate = this.iso8601 (hkt);
          utcDate = utcDate.split ('T');
          utcDate = utcDate[0] + ' ' + trade['t'] + '+08';
          let timestamp = this.parse8601 (utcDate);
          let price = this.safeFloat (trade, 'p');
          let amount = this.safeFloat (trade, 'n');
          let symbol = market['symbol'];
          let cost = this.priceToPrecision (symbol, amount * price);
          return {
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'symbol': symbol,
              'id': undefined,
              'order': undefined,
              'type': 'limit',
              'side': trade['s'],
              'price': price,
              'amount': amount,
              'cost': cost,
              'fee': undefined,
              'info': trade,
          };
      }
  
      async fetchTrades (symbol, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          let market = this.market (symbol);
          let response = await this.publicGetOrders (this.extend ({
              'coin': market['id'],
          }, params));
          let trades = response['data']['d'];
          return this.parseTrades (trades, market, since, limit);
      }
  
      async fetchOHLCV (symbol, timeframe = '1m', since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          let market = this.market (symbol);
          let response = await this.publicGetKline (this.extend ({
              'coin': market['id'],
              'type': this.timeframes[timeframe],
          }, params));
          let ohlcv = JSON.parse (response['data']['datas']['data']);
          return this.parseOHLCVs (ohlcv, market, timeframe, since, limit);
      }
  
      parseOrder (order, market = undefined) {
          let symbol = undefined;
          if (typeof market !== 'undefined')
              symbol = market['symbol'];
          let side = this.safeString (order, 'side');
          if (typeof side === 'undefined') {
              side = this.safeString (order, 'type');
              if (typeof side !== 'undefined')
                  side = (side === 'in') ? 'buy' : 'sell';
              if (typeof side === 'undefined')
                  side = this.safeString (order, 'flag');
          }
          let amount = this.safeFloat (order, 'number');
          let remaining = this.safeFloat (order, 'numberover');
          let filled = undefined;
          if (typeof amount !== 'undefined')
              if (typeof remaining !== 'undefined')
                  filled = amount - remaining;
          let timestamp = undefined;
          let iso8601 = undefined;
          if ('datetime' in order) {
              timestamp = this.parse8601 (order['datetime']);
              iso8601 = this.iso8601 (timestamp);
          }
          return {
              'id': order['id'],
              'datetime': iso8601,
              'timestamp': timestamp,
              'lastTradeTimestamp': undefined,
              'status': 'open',
              'symbol': symbol,
              'type': 'limit',
              'side': side,
              'price': order['price'],
              'cost': undefined,
              'amount': order['number'],
              'filled': filled,
              'remaining': remaining,
              'trades': undefined,
              'fee': undefined,
              'info': order,
          };
      }
  
      async createOrder (symbol, type, side, amount, price = undefined, params = {}) {
          await this.loadMarkets ();
          let market = this.market (symbol);
          let orderType = (side === 'buy') ? 'in' : 'out';
          if (!this.password)
              throw new ExchangeError (this.id + ' createOrder() requires you to set exchange.password = "YOUR_TRADING_PASSWORD" (a trade password is NOT THE SAME as your login password)');
          let request = {
              'coin': market['id'],
              'type': orderType,
              'price': this.priceToPrecision (symbol, price),
              'number': this.amountToString (symbol, amount),
              'tradepwd': this.password,
          };
          let response = await this.privatePostTradeAdd (this.extend (request, params));
          let id = response['data']['id'];
          let order = this.parseOrder ({
              'id': id,
              'price': price,
              'number': amount,
              'side': side,
          }, market);
          this.orders[id] = order;
          return order;
      }
  
      async cancelOrder (id, symbol = undefined, params = {}) {
          await this.loadMarkets ();
          let response = await this.privatePostTradeCancel (this.extend ({
              'id': id,
          }, params));
          return response;
      }
  
      async fetchOpenOrders (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          let market = this.market (symbol);
          let response = await this.privatePostOpenOrders (this.extend ({
              'coin': market['id'],
          }, params));
          return this.parseOrders (response['data'], market, since, limit);
      }
  
      nonce () {
          let currentTimestamp = this.seconds ();
          if (currentTimestamp > this.options['lastNonceTimestamp']) {
              this.options['lastNonceTimestamp'] = currentTimestamp;
              this.options['lastNonce'] = 100000;
          }
          this.options['lastNonce'] = this.sum (this.options['lastNonce'], 1);
          return this.options['lastNonce'];
      }
  
      sign (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
          let url = this.urls['api'] + '/' + path;
          let query = undefined;
          if (api === 'public') {
              query = this.urlencode (params);
              if (query.length)
                  url += '?' + query;
          } else {
              this.checkRequiredCredentials ();
              body = this.urlencode (this.keysort (this.extend ({
                  'api_key': this.apiKey,
                  'timestamp': this.seconds (),
                  'nonce': this.nonce (),
              }, params)));
              body += '&sign=' + this.hash (this.encode (body + this.secret));
              headers = { 'Content-type': 'application/x-www-form-urlencoded' };
          }
          return { 'url': url, 'method': method, 'body': body, 'headers': headers };
      }
  
      async request (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
          let response = await this.fetch2 (path, api, method, params, headers, body);
          let code = this.safeString (response, 'code');
          if (code !== '0') {
              let ErrorClass = this.safeValue ({
                  '103': AuthenticationError,
                  '104': AuthenticationError,
                  '200': AuthenticationError,
                  '202': AuthenticationError,
                  '401': AuthenticationError,
                  '406': AuthenticationError,
                  '203': InvalidNonce,
                  '201': OrderNotFound,
                  '408': InsufficientFunds,
                  '106': DDoSProtection,
              }, code, ExchangeError);
              let message = this.safeString (response, 'msg', 'Error');
              throw new ErrorClass (message);
          }
          return response;
      }
  };
  