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.async_support.base.exchange import Exchange
  
  # -----------------------------------------------------------------------------
  
  try:
      basestring  # Python 3
  except NameError:
      basestring = str  # Python 2
  import hashlib
  import math
  import json
  from ccxt.base.errors import ExchangeError
  from ccxt.base.errors import AuthenticationError
  from ccxt.base.errors import InsufficientFunds
  from ccxt.base.errors import InvalidOrder
  from ccxt.base.errors import OrderNotFound
  from ccxt.base.errors import ExchangeNotAvailable
  
  
  class huobipro (Exchange):
  
      def describe(self):
          return self.deep_extend(super(huobipro, self).describe(), {
              'id': 'huobipro',
              'name': 'Huobi Pro',
              'countries': ['CN'],
              'rateLimit': 2000,
              'userAgent': self.userAgents['chrome39'],
              'version': 'v1',
              'accounts': None,
              'accountsById': None,
              'hostname': 'api.huobi.pro',
              'has': {
                  'CORS': False,
                  'fetchDepositAddress': True,
                  'fetchOHLCV': True,
                  'fetchOrder': True,
                  'fetchOrders': True,
                  'fetchOpenOrders': True,
                  'fetchClosedOrders': True,
                  'fetchTradingLimits': True,
                  'fetchMyTrades': True,
                  'withdraw': True,
                  'fetchCurrencies': True,
              },
              'timeframes': {
                  '1m': '1min',
                  '5m': '5min',
                  '15m': '15min',
                  '30m': '30min',
                  '1h': '60min',
                  '1d': '1day',
                  '1w': '1week',
                  '1M': '1mon',
                  '1y': '1year',
              },
              'urls': {
                  'logo': 'https://user-images.githubusercontent.com/1294454/27766569-15aa7b9a-5edd-11e7-9e7f-44791f4ee49c.jpg',
                  'api': {
                      'market': 'https://api.huobi.pro',
                      'public': 'https://api.huobi.pro',
                      'private': 'https://api.huobi.pro',
                      'zendesk': 'https://huobiglobal.zendesk.com/hc/en-us/articles',
                  },
                  'www': 'https://www.huobi.pro',
                  'referral': 'https://www.huobi.br.com/en-us/topic/invited/?invite_code=rwrd3',
                  'doc': 'https://github.com/huobiapi/API_Docs/wiki/REST_api_reference',
                  'fees': 'https://www.huobi.pro/about/fee/',
              },
              'api': {
                  'zendesk': {
                      'get': [
                          '360000400491-Trade-Limits',
                      ],
                  },
                  'market': {
                      'get': [
                          'history/kline',  # 获取K线数据
                          'detail/merged',  # 获取聚合行情(Ticker)
                          'depth',  # 获取 Market Depth 数据
                          'trade',  # 获取 Trade Detail 数据
                          'history/trade',  # 批量获取最近的交易记录
                          'detail',  # 获取 Market Detail 24小时成交量数据
                      ],
                  },
                  'public': {
                      'get': [
                          'common/symbols',  # 查询系统支持的所有交易对
                          'common/currencys',  # 查询系统支持的所有币种
                          'common/timestamp',  # 查询系统当前时间
                          'common/exchange',  # order limits
                          'settings/currencys',  # ?language=en-US
                      ],
                  },
                  'private': {
                      'get': [
                          'account/accounts',  # 查询当前用户的所有账户(即account-id)
                          'account/accounts/{id}/balance',  # 查询指定账户的余额
                          'order/orders/{id}',  # 查询某个订单详情
                          'order/orders/{id}/matchresults',  # 查询某个订单的成交明细
                          'order/orders',  # 查询当前委托、历史委托
                          'order/matchresults',  # 查询当前成交、历史成交
                          'dw/withdraw-virtual/addresses',  # 查询虚拟币提现地址
                          'dw/deposit-virtual/addresses',
                          'query/deposit-withdraw',
                          'margin/loan-orders',  # 借贷订单
                          'margin/accounts/balance',  # 借贷账户详情
                      ],
                      'post': [
                          'order/orders/place',  # 创建并执行一个新订单(一步下单， 推荐使用)
                          'order/orders',  # 创建一个新的订单请求 （仅创建订单，不执行下单）
                          'order/orders/{id}/place',  # 执行一个订单 （仅执行已创建的订单）
                          'order/orders/{id}/submitcancel',  # 申请撤销一个订单请求
                          'order/orders/batchcancel',  # 批量撤销订单
                          'dw/balance/transfer',  # 资产划转
                          'dw/withdraw/api/create',  # 申请提现虚拟币
                          'dw/withdraw-virtual/create',  # 申请提现虚拟币
                          'dw/withdraw-virtual/{id}/place',  # 确认申请虚拟币提现
                          'dw/withdraw-virtual/{id}/cancel',  # 申请取消提现虚拟币
                          'dw/transfer-in/margin',  # 现货账户划入至借贷账户
                          'dw/transfer-out/margin',  # 借贷账户划出至现货账户
                          'margin/orders',  # 申请借贷
                          'margin/orders/{id}/repay',  # 归还借贷
                      ],
                  },
              },
              'fees': {
                  'trading': {
                      'tierBased': False,
                      'percentage': True,
                      'maker': 0.002,
                      'taker': 0.002,
                  },
              },
              'exceptions': {
                  'account-frozen-balance-insufficient-error': InsufficientFunds,  # {"status":"error","err-code":"account-frozen-balance-insufficient-error","err-msg":"trade account balance is not enough, left: `0.0027`","data":null}
                  'invalid-amount': InvalidOrder,  # eg "Paramemter `amount` is invalid."
                  'order-limitorder-amount-min-error': InvalidOrder,  # limit order amount error, min: `0.001`
                  'order-marketorder-amount-min-error': InvalidOrder,  # market order amount error, min: `0.01`
                  'order-limitorder-price-min-error': InvalidOrder,  # limit order price error
                  'order-limitorder-price-max-error': InvalidOrder,  # limit order price error
                  'order-orderstate-error': OrderNotFound,  # canceling an already canceled order
                  'order-queryorder-invalid': OrderNotFound,  # querying a non-existent order
                  'order-update-error': ExchangeNotAvailable,  # undocumented error
                  'api-signature-check-failed': AuthenticationError,
                  'api-signature-not-valid': AuthenticationError,  # {"status":"error","err-code":"api-signature-not-valid","err-msg":"Signature not valid: Incorrect Access key [Access key错误]","data":null}
              },
              'options': {
                  'createMarketBuyOrderRequiresPrice': True,
                  'fetchMarketsMethod': 'publicGetCommonSymbols',
                  'fetchBalanceMethod': 'privateGetAccountAccountsIdBalance',
                  'createOrderMethod': 'privatePostOrderOrdersPlace',
                  'language': 'en-US',
              },
          })
  
      async def fetch_trading_limits(self, symbols=None, params={}):
          # self method should not be called directly, use loadTradingLimits() instead
          #  by default it will try load withdrawal fees of all currencies(with separate requests)
          #  however if you define symbols = ['ETH/BTC', 'LTC/BTC'] in args it will only load those
          await self.load_markets()
          if symbols is None:
              symbols = self.symbols
          result = {}
          for i in range(0, len(symbols)):
              symbol = symbols[i]
              result[symbol] = await self.fetch_trading_limits_by_id(self.market_id(symbol), params)
          return result
  
      async def fetch_trading_limits_by_id(self, id, params={}):
          request = {
              'symbol': id,
          }
          response = await self.publicGetCommonExchange(self.extend(request, params))
          #
          #     {status:   "ok",
          #         data: {                                 symbol: "aidocbtc",
          #                              'buy-limit-must-less-than':  1.1,
          #                          'sell-limit-must-greater-than':  0.9,
          #                         'limit-order-must-greater-than':  1,
          #                            'limit-order-must-less-than':  5000000,
          #                    'market-buy-order-must-greater-than':  0.0001,
          #                       'market-buy-order-must-less-than':  100,
          #                   'market-sell-order-must-greater-than':  1,
          #                      'market-sell-order-must-less-than':  500000,
          #                       'circuit-break-when-greater-than':  10000,
          #                          'circuit-break-when-less-than':  10,
          #                 'market-sell-order-rate-must-less-than':  0.1,
          #                  'market-buy-order-rate-must-less-than':  0.1        }}
          #
          return self.parse_trading_limits(self.safe_value(response, 'data', {}))
  
      def parse_trading_limits(self, limits, symbol=None, params={}):
          #
          #   {                                 symbol: "aidocbtc",
          #                  'buy-limit-must-less-than':  1.1,
          #              'sell-limit-must-greater-than':  0.9,
          #             'limit-order-must-greater-than':  1,
          #                'limit-order-must-less-than':  5000000,
          #        'market-buy-order-must-greater-than':  0.0001,
          #           'market-buy-order-must-less-than':  100,
          #       'market-sell-order-must-greater-than':  1,
          #          'market-sell-order-must-less-than':  500000,
          #           'circuit-break-when-greater-than':  10000,
          #              'circuit-break-when-less-than':  10,
          #     'market-sell-order-rate-must-less-than':  0.1,
          #      'market-buy-order-rate-must-less-than':  0.1        }
          #
          return {
              'info': limits,
              'limits': {
                  'amount': {
                      'min': self.safe_float(limits, 'limit-order-must-greater-than'),
                      'max': self.safe_float(limits, 'limit-order-must-less-than'),
                  },
              },
          }
  
      async def fetch_markets(self):
          method = self.options['fetchMarketsMethod']
          response = await getattr(self, method)()
          markets = response['data']
          numMarkets = len(markets)
          if numMarkets < 1:
              raise ExchangeError(self.id + ' publicGetCommonSymbols returned empty response: ' + self.json(markets))
          result = []
          for i in range(0, len(markets)):
              market = markets[i]
              baseId = market['base-currency']
              quoteId = market['quote-currency']
              base = baseId.upper()
              quote = quoteId.upper()
              id = baseId + quoteId
              base = self.common_currency_code(base)
              quote = self.common_currency_code(quote)
              symbol = base + '/' + quote
              precision = {
                  'amount': market['amount-precision'],
                  'price': market['price-precision'],
              }
              maker = 0 if (base == 'OMG') else 0.2 / 100
              taker = 0 if (base == 'OMG') else 0.2 / 100
              result.append({
                  'id': id,
                  'symbol': symbol,
                  'base': base,
                  'quote': quote,
                  'baseId': baseId,
                  'quoteId': quoteId,
                  'active': True,
                  'precision': precision,
                  'taker': taker,
                  'maker': maker,
                  'limits': {
                      'amount': {
                          'min': math.pow(10, -precision['amount']),
                          'max': math.pow(10, precision['amount']),
                      },
                      'price': {
                          'min': math.pow(10, -precision['price']),
                          'max': None,
                      },
                      'cost': {
                          'min': 0,
                          'max': None,
                      },
                  },
                  'info': market,
              })
          return result
  
      def parse_ticker(self, ticker, market=None):
          symbol = None
          if market:
              symbol = market['symbol']
          timestamp = self.milliseconds()
          if 'ts' in ticker:
              timestamp = ticker['ts']
          bid = None
          ask = None
          bidVolume = None
          askVolume = None
          if 'bid' in ticker:
              if isinstance(ticker['bid'], list):
                  bid = self.safe_float(ticker['bid'], 0)
                  bidVolume = self.safe_float(ticker['bid'], 1)
          if 'ask' in ticker:
              if isinstance(ticker['ask'], list):
                  ask = self.safe_float(ticker['ask'], 0)
                  askVolume = self.safe_float(ticker['ask'], 1)
          open = self.safe_float(ticker, 'open')
          close = self.safe_float(ticker, 'close')
          change = None
          percentage = None
          average = None
          if (open is not None) and(close is not None):
              change = close - open
              average = self.sum(open, close) / 2
              if (close is not None) and(close > 0):
                  percentage = (change / open) * 100
          baseVolume = self.safe_float(ticker, 'amount')
          quoteVolume = self.safe_float(ticker, 'vol')
          vwap = None
          if baseVolume is not None and quoteVolume is not None and baseVolume > 0:
              vwap = quoteVolume / baseVolume
          return {
              'symbol': symbol,
              'timestamp': timestamp,
              'datetime': self.iso8601(timestamp),
              'high': ticker['high'],
              'low': ticker['low'],
              'bid': bid,
              'bidVolume': bidVolume,
              'ask': ask,
              'askVolume': askVolume,
              'vwap': vwap,
              'open': open,
              'close': close,
              'last': close,
              'previousClose': None,
              'change': change,
              'percentage': percentage,
              'average': average,
              'baseVolume': baseVolume,
              'quoteVolume': quoteVolume,
              'info': ticker,
          }
  
      async def fetch_order_book(self, symbol, limit=None, params={}):
          await self.load_markets()
          market = self.market(symbol)
          response = await self.marketGetDepth(self.extend({
              'symbol': market['id'],
              'type': 'step0',
          }, params))
          if 'tick' in response:
              if not response['tick']:
                  raise ExchangeError(self.id + ' fetchOrderBook() returned empty response: ' + self.json(response))
              orderbook = response['tick']
              timestamp = orderbook['ts']
              orderbook['nonce'] = orderbook['version']
              return self.parse_order_book(orderbook, timestamp)
          raise ExchangeError(self.id + ' fetchOrderBook() returned unrecognized response: ' + self.json(response))
  
      async def fetch_ticker(self, symbol, params={}):
          await self.load_markets()
          market = self.market(symbol)
          response = await self.marketGetDetailMerged(self.extend({
              'symbol': market['id'],
          }, params))
          return self.parse_ticker(response['tick'], market)
  
      def parse_trade(self, trade, market=None):
          symbol = None
          if market is None:
              marketId = self.safe_string(trade, 'symbol')
              if marketId in self.markets_by_id:
                  market = self.markets_by_id[marketId]
          if market is not None:
              symbol = market['symbol']
          timestamp = self.safe_integer_2(trade, 'ts', 'created-at')
          order = self.safe_string(trade, 'order-id')
          side = self.safe_string(trade, 'direction')
          type = self.safe_string(trade, 'type')
          if type is not None:
              typeParts = type.split('-')
              side = typeParts[0]
              type = typeParts[1]
          price = self.safe_float(trade, 'price')
          amount = self.safe_float_2(trade, 'filled-amount', 'amount')
          cost = None
          if price is not None:
              if amount is not None:
                  cost = amount * price
          fee = None
          feeCost = self.safe_float(trade, 'filled-fees')
          feeCurrency = None
          if market is not None:
              feeCurrency = market['base'] if (side == 'buy') else market['quote']
          filledPoints = self.safe_float(trade, 'filled-points')
          if filledPoints is not None:
              if (feeCost is None) or (feeCost == 0.0):
                  feeCost = filledPoints
                  feeCurrency = self.common_currency_code('HBPOINT')
          if feeCost is not None:
              fee = {
                  'cost': feeCost,
                  'currency': feeCurrency,
              }
          return {
              'info': trade,
              'id': self.safe_string(trade, 'id'),
              'order': order,
              'timestamp': timestamp,
              'datetime': self.iso8601(timestamp),
              'symbol': symbol,
              'type': type,
              'side': side,
              'price': price,
              'amount': amount,
              'cost': cost,
              'fee': fee,
          }
  
      async def fetch_my_trades(self, symbol=None, since=None, limit=None, params={}):
          await self.load_markets()
          response = await self.privateGetOrderMatchresults(params)
          trades = self.parse_trades(response['data'], None, since, limit)
          if symbol is not None:
              market = self.market(symbol)
              trades = self.filter_by_symbol(trades, market['symbol'])
          return trades
  
      async def fetch_trades(self, symbol, since=None, limit=1000, params={}):
          await self.load_markets()
          market = self.market(symbol)
          request = {
              'symbol': market['id'],
          }
          if limit is not None:
              request['size'] = limit
          response = await self.marketGetHistoryTrade(self.extend(request, params))
          data = response['data']
          result = []
          for i in range(0, len(data)):
              trades = data[i]['data']
              for j in range(0, len(trades)):
                  trade = self.parse_trade(trades[j], market)
                  result.append(trade)
          result = self.sort_by(result, 'timestamp')
          return self.filter_by_symbol_since_limit(result, symbol, since, limit)
  
      def parse_ohlcv(self, ohlcv, market=None, timeframe='1m', since=None, limit=None):
          return [
              ohlcv['id'] * 1000,
              ohlcv['open'],
              ohlcv['high'],
              ohlcv['low'],
              ohlcv['close'],
              ohlcv['amount'],
          ]
  
      async def fetch_ohlcv(self, symbol, timeframe='1m', since=None, limit=1000, params={}):
          await self.load_markets()
          market = self.market(symbol)
          request = {
              'symbol': market['id'],
              'period': self.timeframes[timeframe],
          }
          if limit is not None:
              request['size'] = limit
          response = await self.marketGetHistoryKline(self.extend(request, params))
          return self.parse_ohlcvs(response['data'], market, timeframe, since, limit)
  
      async def load_accounts(self, reload=False):
          if reload:
              self.accounts = await self.fetch_accounts()
          else:
              if self.accounts:
                  return self.accounts
              else:
                  self.accounts = await self.fetch_accounts()
                  self.accountsById = self.index_by(self.accounts, 'id')
          return self.accounts
  
      async def fetch_accounts(self):
          await self.load_markets()
          response = await self.privateGetAccountAccounts()
          return response['data']
  
      async def fetch_currencies(self, params={}):
          response = await self.publicGetSettingsCurrencys(self.extend({
              'language': self.options['language'],
          }, params))
          currencies = response['data']
          result = {}
          for i in range(0, len(currencies)):
              currency = currencies[i]
              #
              #  {                    name: "ctxc",
              #              'display-name': "CTXC",
              #        'withdraw-precision':  8,
              #             'currency-type': "eth",
              #        'currency-partition': "pro",
              #             'support-sites':  null,
              #                'otc-enable':  0,
              #        'deposit-min-amount': "2",
              #       'withdraw-min-amount': "4",
              #            'show-precision': "8",
              #                      weight: "2988",
              #                     visible:  True,
              #              'deposit-desc': "Please don’t deposit any other digital assets except CTXC t…",
              #             'withdraw-desc': "Minimum withdrawal amount: 4 CTXC. not >_<not For security reason…",
              #           'deposit-enabled':  True,
              #          'withdraw-enabled':  True,
              #    'currency-addr-with-tag':  False,
              #             'fast-confirms':  15,
              #             'safe-confirms':  30                                                             }
              #
              id = self.safe_value(currency, 'name')
              precision = self.safe_integer(currency, 'withdraw-precision')
              code = self.common_currency_code(id.upper())
              active = currency['visible'] and currency['deposit-enabled'] and currency['withdraw-enabled']
              result[code] = {
                  'id': id,
                  'code': code,
                  'type': 'crypto',
                  # 'payin': currency['deposit-enabled'],
                  # 'payout': currency['withdraw-enabled'],
                  # 'transfer': None,
                  'name': currency['display-name'],
                  'active': active,
                  'fee': None,  # todo need to fetch from fee endpoint
                  'precision': precision,
                  'limits': {
                      'amount': {
                          'min': math.pow(10, -precision),
                          'max': math.pow(10, precision),
                      },
                      'price': {
                          'min': math.pow(10, -precision),
                          'max': math.pow(10, precision),
                      },
                      'cost': {
                          'min': None,
                          'max': None,
                      },
                      'deposit': {
                          'min': self.safe_float(currency, 'deposit-min-amount'),
                          'max': math.pow(10, precision),
                      },
                      'withdraw': {
                          'min': self.safe_float(currency, 'withdraw-min-amount'),
                          'max': math.pow(10, precision),
                      },
                  },
                  'info': currency,
              }
          return result
  
      async def fetch_balance(self, params={}):
          await self.load_markets()
          await self.load_accounts()
          method = self.options['fetchBalanceMethod']
          response = await getattr(self, method)(self.extend({
              'id': self.accounts[0]['id'],
          }, params))
          balances = response['data']['list']
          result = {'info': response}
          for i in range(0, len(balances)):
              balance = balances[i]
              uppercase = balance['currency'].upper()
              currency = self.common_currency_code(uppercase)
              account = None
              if currency in result:
                  account = result[currency]
              else:
                  account = self.account()
              if balance['type'] == 'trade':
                  account['free'] = float(balance['balance'])
              if balance['type'] == 'frozen':
                  account['used'] = float(balance['balance'])
              account['total'] = self.sum(account['free'], account['used'])
              result[currency] = account
          return self.parse_balance(result)
  
      async def fetch_orders_by_states(self, states, symbol=None, since=None, limit=None, params={}):
          await self.load_markets()
          request = {
              'states': states,
          }
          market = None
          if symbol is not None:
              market = self.market(symbol)
              request['symbol'] = market['id']
          response = await self.privateGetOrderOrders(self.extend(request, params))
          return self.parse_orders(response['data'], market, since, limit)
  
      async def fetch_orders(self, symbol=None, since=None, limit=None, params={}):
          return await self.fetch_orders_by_states('pre-submitted,submitted,partial-filled,filled,partial-canceled,canceled', symbol, since, limit, params)
  
      async def fetch_open_orders(self, symbol=None, since=None, limit=None, params={}):
          return await self.fetch_orders_by_states('pre-submitted,submitted,partial-filled', symbol, since, limit, params)
  
      async def fetch_closed_orders(self, symbol=None, since=None, limit=None, params={}):
          return await self.fetch_orders_by_states('filled,partial-canceled,canceled', symbol, since, limit, params)
  
      async def fetch_order(self, id, symbol=None, params={}):
          await self.load_markets()
          response = await self.privateGetOrderOrdersId(self.extend({
              'id': id,
          }, params))
          return self.parse_order(response['data'])
  
      def parse_order_status(self, status):
          statuses = {
              'partial-filled': 'open',
              'partial-canceled': 'canceled',
              'filled': 'closed',
              'canceled': 'canceled',
              'submitted': 'open',
          }
          return self.safe_string(statuses, status, status)
  
      def parse_order(self, order, market=None):
          id = self.safe_string(order, 'id')
          side = None
          type = None
          status = None
          if 'type' in order:
              orderType = order['type'].split('-')
              side = orderType[0]
              type = orderType[1]
              status = self.parse_order_status(self.safe_string(order, 'state'))
          symbol = None
          if market is None:
              if 'symbol' in order:
                  if order['symbol'] in self.markets_by_id:
                      marketId = order['symbol']
                      market = self.markets_by_id[marketId]
          if market is not None:
              symbol = market['symbol']
          timestamp = self.safe_integer(order, 'created-at')
          amount = self.safe_float(order, 'amount')
          filled = self.safe_float(order, 'field-amount')  # typo in their API, filled amount
          price = self.safe_float(order, 'price')
          cost = self.safe_float(order, 'field-cash-amount')  # same typo
          remaining = None
          average = None
          if filled is not None:
              average = 0
              if amount is not None:
                  remaining = amount - filled
              # if cost is defined and filled is not zero
              if (cost is not None) and(filled > 0):
                  average = cost / filled
          result = {
              'info': order,
              'id': id,
              'timestamp': timestamp,
              'datetime': self.iso8601(timestamp),
              'lastTradeTimestamp': None,
              'symbol': symbol,
              'type': type,
              'side': side,
              'price': price,
              'average': average,
              'cost': cost,
              'amount': amount,
              'filled': filled,
              'remaining': remaining,
              'status': status,
              'fee': None,
          }
          return result
  
      async def create_order(self, symbol, type, side, amount, price=None, params={}):
          await self.load_markets()
          await self.load_accounts()
          market = self.market(symbol)
          request = {
              'account-id': self.accounts[0]['id'],
              'amount': self.amount_to_precision(symbol, amount),
              'symbol': market['id'],
              'type': side + '-' + type,
          }
          if self.options['createMarketBuyOrderRequiresPrice']:
              if (type == 'market') and(side == 'buy'):
                  if price is None:
                      raise InvalidOrder(self.id + " market buy order requires price argument to calculate cost(total amount of quote currency to spend for buying, amount * price). To switch off self warning exception and specify cost in the amount argument, set .options['createMarketBuyOrderRequiresPrice'] = False. Make sure you know what you're doing.")
                  else:
                      request['amount'] = self.price_to_precision(symbol, float(amount) * float(price))
          if type == 'limit':
              request['price'] = self.price_to_precision(symbol, price)
          method = self.options['createOrderMethod']
          response = await getattr(self, method)(self.extend(request, params))
          timestamp = self.milliseconds()
          return {
              'info': response,
              'id': response['data'],
              'timestamp': timestamp,
              'datetime': self.iso8601(timestamp),
              'lastTradeTimestamp': None,
              'status': None,
              'symbol': symbol,
              'type': type,
              'side': side,
              'price': price,
              'amount': amount,
              'filled': None,
              'remaining': None,
              'cost': None,
              'trades': None,
              'fee': None,
          }
  
      async def cancel_order(self, id, symbol=None, params={}):
          response = await self.privatePostOrderOrdersIdSubmitcancel({'id': id})
          #
          #     response = {
          #         'status': 'ok',
          #         'data': '10138899000',
          #     }
          #
          return self.extend(self.parse_order(response), {
              'id': id,
              'status': 'canceled',
          })
  
      async def fetch_deposit_address(self, code, params={}):
          await self.load_markets()
          currency = self.currency(code)
          response = await self.privateGetDwDepositVirtualAddresses(self.extend({
              'currency': currency['id'].lower(),
          }, params))
          address = self.safe_string(response, 'data')
          self.check_address(address)
          return {
              'currency': code,
              'address': address,
              'info': response,
          }
  
      def currency_to_precision(self, currency, fee):
          return self.decimal_to_precision(fee, 0, self.currencies[currency]['precision'])
  
      def calculate_fee(self, symbol, type, side, amount, price, takerOrMaker='taker', params={}):
          market = self.markets[symbol]
          rate = market[takerOrMaker]
          cost = amount * rate
          key = 'quote'
          if side == 'sell':
              cost *= price
          else:
              key = 'base'
          return {
              'type': takerOrMaker,
              'currency': market[key],
              'rate': rate,
              'cost': float(self.currency_to_precision(market[key], cost)),
          }
  
      async def withdraw(self, code, amount, address, tag=None, params={}):
          await self.load_markets()
          self.check_address(address)
          currency = self.currency(code)
          request = {
              'address': address,  # only supports existing addresses in your withdraw address list
              'amount': amount,
              'currency': currency['id'].lower(),
          }
          if tag is not None:
              request['addr-tag'] = tag  # only for XRP?
          response = await self.privatePostDwWithdrawApiCreate(self.extend(request, params))
          id = None
          if 'data' in response:
              id = response['data']
          return {
              'info': response,
              'id': id,
          }
  
      def sign(self, path, api='public', method='GET', params={}, headers=None, body=None):
          url = '/'
          if api == 'market':
              url += api
          elif (api == 'public') or (api == 'private'):
              url += self.version
          url += '/' + self.implode_params(path, params)
          query = self.omit(params, self.extract_params(path))
          if api == 'private':
              self.check_required_credentials()
              timestamp = self.ymdhms(self.milliseconds(), 'T')
              request = self.keysort(self.extend({
                  'SignatureMethod': 'HmacSHA256',
                  'SignatureVersion': '2',
                  'AccessKeyId': self.apiKey,
                  'Timestamp': timestamp,
              }, query))
              auth = self.urlencode(request)
              # unfortunately, PHP demands double quotes for the escaped newline symbol
              # eslint-disable-next-line quotes
              payload = "\n".join([method, self.hostname, url, auth])
              signature = self.hmac(self.encode(payload), self.encode(self.secret), hashlib.sha256, 'base64')
              auth += '&' + self.urlencode({'Signature': signature})
              url += '?' + auth
              if method == 'POST':
                  body = self.json(query)
                  headers = {
                      'Content-Type': 'application/json',
                  }
              else:
                  headers = {
                      'Content-Type': 'application/x-www-form-urlencoded',
                  }
          else:
              if params:
                  url += '?' + self.urlencode(params)
          url = self.urls['api'][api] + url
          return {'url': url, 'method': method, 'body': body, 'headers': headers}
  
      def handle_errors(self, httpCode, reason, url, method, headers, body):
          if not isinstance(body, basestring):
              return  # fallback to default error handler
          if len(body) < 2:
              return  # fallback to default error handler
          if (body[0] == '{') or (body[0] == '['):
              response = json.loads(body)
              if 'status' in response:
                  #
                  #     {"status":"error","err-code":"order-limitorder-amount-min-error","err-msg":"limit order amount error, min: `0.001`","data":null}
                  #
                  status = self.safe_string(response, 'status')
                  if status == 'error':
                      code = self.safe_string(response, 'err-code')
                      feedback = self.id + ' ' + self.json(response)
                      exceptions = self.exceptions
                      if code in exceptions:
                          raise exceptions[code](feedback)
                      raise ExchangeError(feedback)
  