text: # -*- coding: utf-8 -*-
  
  # PLEASE DO NOT EDIT THIS FILE, IT IS GENERATED AND WILL BE OVERWRITTEN:
  # https://github.com/ccxt/ccxt/blob/master/CONTRIBUTING.md#how-to-contribute-code
  
  from ccxt.base.exchange import Exchange
  
  # -----------------------------------------------------------------------------
  
  try:
      basestring  # Python 3
  except NameError:
      basestring = str  # Python 2
  import math
  import json
  from ccxt.base.errors import ExchangeError
  from ccxt.base.errors import NullResponse
  from ccxt.base.errors import InvalidOrder
  from ccxt.base.errors import NotSupported
  
  
  class cex (Exchange):
  
      def describe(self):
          return self.deep_extend(super(cex, self).describe(), {
              'id': 'cex',
              'name': 'CEX.IO',
              'countries': ['GB', 'EU', 'CY', 'RU'],
              'rateLimit': 1500,
              'has': {
                  'CORS': True,
                  'fetchTickers': True,
                  'fetchOHLCV': True,
                  'fetchOrder': True,
                  'fetchOpenOrders': True,
                  'fetchClosedOrders': True,
                  'fetchDepositAddress': True,
              },
              'timeframes': {
                  '1m': '1m',
              },
              'urls': {
                  'logo': 'https://user-images.githubusercontent.com/1294454/27766442-8ddc33b0-5ed8-11e7-8b98-f786aef0f3c9.jpg',
                  'api': 'https://cex.io/api',
                  'www': 'https://cex.io',
                  'doc': 'https://cex.io/cex-api',
                  'fees': [
                      'https://cex.io/fee-schedule',
                      'https://cex.io/limits-commissions',
                  ],
              },
              'requiredCredentials': {
                  'apiKey': True,
                  'secret': True,
                  'uid': True,
              },
              'api': {
                  'public': {
                      'get': [
                          'currency_limits/',
                          'last_price/{pair}/',
                          'last_prices/{currencies}/',
                          'ohlcv/hd/{yyyymmdd}/{pair}',
                          'order_book/{pair}/',
                          'ticker/{pair}/',
                          'tickers/{currencies}/',
                          'trade_history/{pair}/',
                      ],
                      'post': [
                          'convert/{pair}',
                          'price_stats/{pair}',
                      ],
                  },
                  'private': {
                      'post': [
                          'active_orders_status/',
                          'archived_orders/{pair}/',
                          'balance/',
                          'cancel_order/',
                          'cancel_orders/{pair}/',
                          'cancel_replace_order/{pair}/',
                          'close_position/{pair}/',
                          'get_address/',
                          'get_myfee/',
                          'get_order/',
                          'get_order_tx/',
                          'open_orders/{pair}/',
                          'open_orders/',
                          'open_position/{pair}/',
                          'open_positions/{pair}/',
                          'place_order/{pair}/',
                      ],
                  },
              },
              'fees': {
                  'trading': {
                      'maker': 0.16 / 100,
                      'taker': 0.25 / 100,
                  },
                  'funding': {
                      'withdraw': {
                          # 'USD': None,
                          # 'EUR': None,
                          # 'RUB': None,
                          # 'GBP': None,
                          'BTC': 0.001,
                          'ETH': 0.01,
                          'BCH': 0.001,
                          'DASH': 0.01,
                          'BTG': 0.001,
                          'ZEC': 0.001,
                          'XRP': 0.02,
                      },
                      'deposit': {
                          # 'USD': amount => amount * 0.035 + 0.25,
                          # 'EUR': amount => amount * 0.035 + 0.24,
                          # 'RUB': amount => amount * 0.05 + 15.57,
                          # 'GBP': amount => amount * 0.035 + 0.2,
                          'BTC': 0.0,
                          'ETH': 0.0,
                          'BCH': 0.0,
                          'DASH': 0.0,
                          'BTG': 0.0,
                          'ZEC': 0.0,
                          'XRP': 0.0,
                          'XLM': 0.0,
                      },
                  },
              },
              'options': {
                  'fetchOHLCVWarning': True,
              },
          })
  
      def fetch_markets(self):
          markets = self.publicGetCurrencyLimits()
          result = []
          for p in range(0, len(markets['data']['pairs'])):
              market = markets['data']['pairs'][p]
              id = market['symbol1'] + '/' + market['symbol2']
              symbol = id
              base, quote = symbol.split('/')
              result.append({
                  'id': id,
                  'info': market,
                  'symbol': symbol,
                  'base': base,
                  'quote': quote,
                  'lot': market['minLotSize'],
                  'precision': {
                      'price': self.precision_from_string(market['minPrice']),
                      'amount': -1 * math.log10(market['minLotSize']),
                  },
                  'limits': {
                      'amount': {
                          'min': market['minLotSize'],
                          'max': market['maxLotSize'],
                      },
                      'price': {
                          'min': self.safe_float(market, 'minPrice'),
                          'max': self.safe_float(market, 'maxPrice'),
                      },
                      'cost': {
                          'min': market['minLotSizeS2'],
                          'max': None,
                      },
                  },
              })
          return result
  
      def fetch_balance(self, params={}):
          self.load_markets()
          response = self.privatePostBalance()
          result = {'info': response}
          ommited = ['username', 'timestamp']
          balances = self.omit(response, ommited)
          currencies = list(balances.keys())
          for i in range(0, len(currencies)):
              currency = currencies[i]
              if currency in balances:
                  account = {
                      'free': self.safe_float(balances[currency], 'available', 0.0),
                      'used': self.safe_float(balances[currency], 'orders', 0.0),
                      'total': 0.0,
                  }
                  account['total'] = self.sum(account['free'], account['used'])
                  result[currency] = account
          return self.parse_balance(result)
  
      def fetch_order_book(self, symbol, limit=None, params={}):
          self.load_markets()
          request = {
              'pair': self.market_id(symbol),
          }
          if limit is not None:
              request['depth'] = limit
          orderbook = self.publicGetOrderBookPair(self.extend(request, params))
          timestamp = orderbook['timestamp'] * 1000
          return self.parse_order_book(orderbook, timestamp)
  
      def parse_ohlcv(self, ohlcv, market=None, timeframe='1m', since=None, limit=None):
          return [
              ohlcv[0] * 1000,
              ohlcv[1],
              ohlcv[2],
              ohlcv[3],
              ohlcv[4],
              ohlcv[5],
          ]
  
      def fetch_ohlcv(self, symbol, timeframe='1m', since=None, limit=None, params={}):
          self.load_markets()
          market = self.market(symbol)
          if not since:
              since = self.milliseconds() - 86400000  # yesterday
          else:
              if self.options['fetchOHLCVWarning']:
                  raise ExchangeError(self.id + " fetchOHLCV warning: CEX can return historical candles for a certain date only, self might produce an empty or null reply. Set exchange.options['fetchOHLCVWarning'] = False or add({'options': {'fetchOHLCVWarning': False}}) to constructor params to suppress self warning message.")
          ymd = self.ymd(since)
          ymd = ymd.split('-')
          ymd = ''.join(ymd)
          request = {
              'pair': market['id'],
              'yyyymmdd': ymd,
          }
          try:
              response = self.publicGetOhlcvHdYyyymmddPair(self.extend(request, params))
              key = 'data' + self.timeframes[timeframe]
              ohlcvs = json.loads(response[key])
              return self.parse_ohlcvs(ohlcvs, market, timeframe, since, limit)
          except Exception as e:
              if isinstance(e, NullResponse):
                  return []
  
      def parse_ticker(self, ticker, market=None):
          timestamp = None
          iso8601 = None
          if 'timestamp' in ticker:
              timestamp = int(ticker['timestamp']) * 1000
              iso8601 = self.iso8601(timestamp)
          volume = self.safe_float(ticker, 'volume')
          high = self.safe_float(ticker, 'high')
          low = self.safe_float(ticker, 'low')
          bid = self.safe_float(ticker, 'bid')
          ask = self.safe_float(ticker, 'ask')
          last = self.safe_float(ticker, 'last')
          symbol = None
          if market:
              symbol = market['symbol']
          return {
              'symbol': symbol,
              'timestamp': timestamp,
              'datetime': iso8601,
              'high': high,
              'low': low,
              'bid': bid,
              'bidVolume': None,
              'ask': ask,
              'askVolume': None,
              'vwap': None,
              'open': None,
              'close': last,
              'last': last,
              'previousClose': None,
              'change': None,
              'percentage': None,
              'average': None,
              'baseVolume': volume,
              'quoteVolume': None,
              'info': ticker,
          }
  
      def fetch_tickers(self, symbols=None, params={}):
          self.load_markets()
          currencies = list(self.currencies.keys())
          response = self.publicGetTickersCurrencies(self.extend({
              'currencies': '/'.join(currencies),
          }, params))
          tickers = response['data']
          result = {}
          for t in range(0, len(tickers)):
              ticker = tickers[t]
              symbol = ticker['pair'].replace(':', '/')
              market = self.markets[symbol]
              result[symbol] = self.parse_ticker(ticker, market)
          return result
  
      def fetch_ticker(self, symbol, params={}):
          self.load_markets()
          market = self.market(symbol)
          ticker = self.publicGetTickerPair(self.extend({
              'pair': market['id'],
          }, params))
          return self.parse_ticker(ticker, market)
  
      def parse_trade(self, trade, market=None):
          timestamp = int(trade['date']) * 1000
          return {
              'info': trade,
              'id': trade['tid'],
              'timestamp': timestamp,
              'datetime': self.iso8601(timestamp),
              'symbol': market['symbol'],
              'type': None,
              'side': trade['type'],
              'price': self.safe_float(trade, 'price'),
              'amount': self.safe_float(trade, 'amount'),
          }
  
      def fetch_trades(self, symbol, since=None, limit=None, params={}):
          self.load_markets()
          market = self.market(symbol)
          response = self.publicGetTradeHistoryPair(self.extend({
              'pair': market['id'],
          }, params))
          return self.parse_trades(response, market, since, limit)
  
      def create_order(self, symbol, type, side, amount, price=None, params={}):
          self.load_markets()
          order = {
              'pair': self.market_id(symbol),
              'type': side,
              'amount': amount,
          }
          if type == 'limit':
              order['price'] = price
          else:
              # for market buy CEX.io requires the amount of quote currency to spend
              if side == 'buy':
                  if not price:
                      raise InvalidOrder('For market buy orders ' + self.id + " requires the amount of quote currency to spend, to calculate proper costs call createOrder(symbol, 'market', 'buy', amount, price)")
                  order['amount'] = amount * price
              order['order_type'] = type
          response = self.privatePostPlaceOrderPair(self.extend(order, params))
          return {
              'info': response,
              'id': response['id'],
          }
  
      def cancel_order(self, id, symbol=None, params={}):
          self.load_markets()
          return self.privatePostCancelOrder({'id': id})
  
      def parse_order(self, order, market=None):
          # Depending on the call, 'time' can be a unix int, unix string or ISO string
          # Yes, really
          timestamp = order['time']
          if isinstance(order['time'], basestring) and order['time'].find('T') >= 0:
              # ISO8601 string
              timestamp = self.parse8601(timestamp)
          else:
              # either integer or string integer
              timestamp = int(timestamp)
          symbol = None
          if not market:
              symbol = order['symbol1'] + '/' + order['symbol2']
              if symbol in self.markets:
                  market = self.market(symbol)
          status = order['status']
          if status == 'a':
              status = 'open'  # the unified status
          elif status == 'cd':
              status = 'canceled'
          elif status == 'c':
              status = 'canceled'
          elif status == 'd':
              status = 'closed'
          price = self.safe_float(order, 'price')
          amount = self.safe_float(order, 'amount')
          remaining = self.safe_float(order, 'pending')
          if not remaining:
              remaining = self.safe_float(order, 'remains')
          filled = amount - remaining
          fee = None
          cost = None
          if market:
              symbol = market['symbol']
              cost = self.safe_float(order, 'ta:' + market['quote'])
              if cost is None:
                  cost = self.safe_float(order, 'tta:' + market['quote'])
              baseFee = 'fa:' + market['base']
              baseTakerFee = 'tfa:' + market['base']
              quoteFee = 'fa:' + market['quote']
              quoteTakerFee = 'tfa:' + market['quote']
              feeRate = self.safe_float(order, 'tradingFeeMaker')
              if not feeRate:
                  feeRate = self.safe_float(order, 'tradingFeeTaker', feeRate)
              if feeRate:
                  feeRate /= 100.0  # convert to mathematically-correct percentage coefficients: 1.0 = 100%
              if (baseFee in list(order.keys())) or (baseTakerFee in list(order.keys())):
                  baseFeeCost = self.safe_float(order, baseFee)
                  if baseFeeCost is None:
                      baseFeeCost = self.safe_float(order, baseTakerFee)
                  fee = {
                      'currency': market['base'],
                      'rate': feeRate,
                      'cost': baseFeeCost,
                  }
              elif (quoteFee in list(order.keys())) or (quoteTakerFee in list(order.keys())):
                  quoteFeeCost = self.safe_float(order, quoteFee)
                  if quoteFeeCost is None:
                      quoteFeeCost = self.safe_float(order, quoteTakerFee)
                  fee = {
                      'currency': market['quote'],
                      'rate': feeRate,
                      'cost': quoteFeeCost,
                  }
          if not cost:
              cost = price * filled
          return {
              'id': order['id'],
              'datetime': self.iso8601(timestamp),
              'timestamp': timestamp,
              'lastTradeTimestamp': None,
              'status': status,
              'symbol': symbol,
              'type': None,
              'side': order['type'],
              'price': price,
              'cost': cost,
              'amount': amount,
              'filled': filled,
              'remaining': remaining,
              'trades': None,
              'fee': fee,
              'info': order,
          }
  
      def fetch_open_orders(self, symbol=None, since=None, limit=None, params={}):
          self.load_markets()
          request = {}
          method = 'privatePostOpenOrders'
          market = None
          if symbol:
              market = self.market(symbol)
              request['pair'] = market['id']
              method += 'Pair'
          orders = getattr(self, method)(self.extend(request, params))
          for i in range(0, len(orders)):
              orders[i] = self.extend(orders[i], {'status': 'open'})
          return self.parse_orders(orders, market, since, limit)
  
      def fetch_closed_orders(self, symbol=None, since=None, limit=None, params={}):
          self.load_markets()
          method = 'privatePostArchivedOrdersPair'
          if symbol is None:
              raise NotSupported(self.id + ' fetchClosedOrders requires a symbol argument')
          market = self.market(symbol)
          request = {'pair': market['id']}
          response = getattr(self, method)(self.extend(request, params))
          return self.parse_orders(response, market, since, limit)
  
      def fetch_order(self, id, symbol=None, params={}):
          self.load_markets()
          response = self.privatePostGetOrder(self.extend({
              'id': str(id),
          }, params))
          return self.parse_order(response)
  
      def nonce(self):
          return self.milliseconds()
  
      def sign(self, path, api='public', method='GET', params={}, headers=None, body=None):
          url = self.urls['api'] + '/' + self.implode_params(path, params)
          query = self.omit(params, self.extract_params(path))
          if api == 'public':
              if query:
                  url += '?' + self.urlencode(query)
          else:
              self.check_required_credentials()
              nonce = str(self.nonce())
              auth = nonce + self.uid + self.apiKey
              signature = self.hmac(self.encode(auth), self.encode(self.secret))
              body = self.urlencode(self.extend({
                  'key': self.apiKey,
                  'signature': signature.upper(),
                  'nonce': nonce,
              }, query))
              headers = {
                  'Content-Type': 'application/x-www-form-urlencoded',
              }
          return {'url': url, 'method': method, 'body': body, 'headers': headers}
  
      def request(self, path, api='public', method='GET', params={}, headers=None, body=None):
          response = self.fetch2(path, api, method, params, headers, body)
          if not response:
              raise NullResponse(self.id + ' returned ' + self.json(response))
          elif response is True:
              return response
          elif 'e' in response:
              if 'ok' in response:
                  if response['ok'] == 'ok':
                      return response
              raise ExchangeError(self.id + ' ' + self.json(response))
          elif 'error' in response:
              if response['error']:
                  raise ExchangeError(self.id + ' ' + self.json(response))
          return response
  
      def fetch_deposit_address(self, code, params={}):
          if code == 'XRP':
              # https://github.com/ccxt/ccxt/pull/2327#issuecomment-375204856
              raise NotSupported(self.id + ' fetchDepositAddress does not support XRP addresses yet(awaiting docs from CEX.io)')
          self.load_markets()
          currency = self.currency(code)
          request = {
              'currency': currency['id'],
          }
          response = self.privatePostGetAddress(self.extend(request, params))
          address = self.safe_string(response, 'data')
          self.check_address(address)
          return {
              'currency': code,
              'address': address,
              'tag': None,
              'status': 'ok',
              'info': response,
          }
  