# -*- 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
import hashlib
import math
from ccxt.base.errors import ExchangeError
from ccxt.base.errors import AuthenticationError
from ccxt.base.errors import PermissionDenied
from ccxt.base.errors import ArgumentsRequired
from ccxt.base.errors import BadRequest
from ccxt.base.errors import BadSymbol
from ccxt.base.errors import InsufficientFunds
from ccxt.base.errors import InvalidOrder
from ccxt.base.decimal_to_precision import TICK_SIZE
from ccxt.base.precise import Precise


class ascendex(Exchange):

    def describe(self):
        return self.deep_extend(super(ascendex, self).describe(), {
            'id': 'ascendex',
            'name': 'AscendEX',
            'countries': ['SG', 'CN'],  # Singapore, China
            'rateLimit': 500,
            # new metainfo interface
            'has': {
                'CORS': False,
                'fetchMarkets': True,
                'fetchCurrencies': True,
                'fetchOrderBook': True,
                'fetchTicker': True,
                'fetchTickers': True,
                'fetchOHLCV': True,
                'fetchTrades': True,
                'fetchAccounts': True,
                'fetchBalance': True,
                'createOrder': True,
                'cancelOrder': True,
                'cancelAllOrders': True,
                'fetchDepositAddress': True,
                'fetchTransactions': True,
                'fetchDeposits': True,
                'fetchWithdrawals': True,
                'fetchOrder': True,
                'fetchOrders': True,
                'fetchOpenOrders': True,
                'fetchClosedOrders': True,
            },
            'timeframes': {
                '1m': '1',
                '5m': '5',
                '15m': '15',
                '30m': '30',
                '1h': '60',
                '2h': '120',
                '4h': '240',
                '6h': '360',
                '12h': '720',
                '1d': '1d',
                '1w': '1w',
                '1M': '1m',
            },
            'version': 'v1',
            'urls': {
                'logo': 'https://user-images.githubusercontent.com/1294454/112027508-47984600-8b48-11eb-9e17-d26459cc36c6.jpg',
                'api': 'https://ascendex.com',
                'test': 'https://bitmax-test.io',
                'www': 'https://ascendex.com',
                'doc': [
                    'https://bitmax-exchange.github.io/bitmax-pro-api/#bitmax-pro-api-documentation',
                ],
                'fees': 'https://ascendex.com/en/feerate/transactionfee-traderate',
                'referral': 'https://bitmax.io/#/register?inviteCode=EL6BXBQM',
            },
            'api': {
                'public': {
                    'get': [
                        'assets',
                        'products',
                        'ticker',
                        'barhist/info',
                        'barhist',
                        'depth',
                        'trades',
                        'cash/assets',  # not documented
                        'cash/products',  # not documented
                        'margin/assets',  # not documented
                        'margin/products',  # not documented
                        'futures/collateral',
                        'futures/contracts',
                        'futures/ref-px',
                        'futures/market-data',
                        'futures/funding-rates',
                    ],
                },
                'accountCategory': {
                    'get': [
                        'balance',
                        'order/open',
                        'order/status',
                        'order/hist/current',
                        'risk',
                    ],
                    'post': [
                        'order',
                        'order/batch',
                    ],
                    'delete': [
                        'order',
                        'order/all',
                        'order/batch',
                    ],
                },
                'accountGroup': {
                    'get': [
                        'cash/balance',
                        'margin/balance',
                        'margin/risk',
                        'transfer',
                        'futures/collateral-balance',
                        'futures/position',
                        'futures/risk',
                        'futures/funding-payments',
                        'order/hist',
                    ],
                    'post': [
                        'futures/transfer/deposit',
                        'futures/transfer/withdraw',
                    ],
                },
                'private': {
                    'get': [
                        'info',
                        'wallet/transactions',
                        'wallet/deposit/address',  # not documented
                    ],
                },
            },
            'fees': {
                'trading': {
                    'feeSide': 'get',
                    'tierBased': True,
                    'percentage': True,
                    'taker': 0.002,
                    'maker': 0.002,
                },
            },
            'precisionMode': TICK_SIZE,
            'options': {
                'account-category': 'cash',  # 'cash'/'margin'/'futures'
                'account-group': None,
                'fetchClosedOrders': {
                    'method': 'accountGroupGetOrderHist',  # 'accountGroupGetAccountCategoryOrderHistCurrent'
                },
            },
            'exceptions': {
                'exact': {
                    # not documented
                    '1900': BadRequest,  # {"code":1900,"message":"Invalid Http Request Input"}
                    '2100': AuthenticationError,  # {"code":2100,"message":"ApiKeyFailure"}
                    '5002': BadSymbol,  # {"code":5002,"message":"Invalid Symbol"}
                    '6001': BadSymbol,  # {"code":6001,"message":"Trading is disabled on symbol."}
                    '6010': InsufficientFunds,  # {'code': 6010, 'message': 'Not enough balance.'}
                    '60060': InvalidOrder,  # {'code': 60060, 'message': 'The order is already filled or canceled.'}
                    '600503': InvalidOrder,  # {"code":600503,"message":"Notional is too small."}
                    # documented
                    '100001': BadRequest,  # INVALID_HTTP_INPUT Http request is invalid
                    '100002': BadRequest,  # DATA_NOT_AVAILABLE Some required data is missing
                    '100003': BadRequest,  # KEY_CONFLICT The same key exists already
                    '100004': BadRequest,  # INVALID_REQUEST_DATA The HTTP request contains invalid field or argument
                    '100005': BadRequest,  # INVALID_WS_REQUEST_DATA Websocket request contains invalid field or argument
                    '100006': BadRequest,  # INVALID_ARGUMENT The arugment is invalid
                    '100007': BadRequest,  # ENCRYPTION_ERROR Something wrong with data encryption
                    '100008': BadSymbol,  # SYMBOL_ERROR Symbol does not exist or not valid for the request
                    '100009': AuthenticationError,  # AUTHORIZATION_NEEDED Authorization is require for the API access or request
                    '100010': BadRequest,  # INVALID_OPERATION The action is invalid or not allowed for the account
                    '100011': BadRequest,  # INVALID_TIMESTAMP Not a valid timestamp
                    '100012': BadRequest,  # INVALID_STR_FORMAT String format does not
                    '100013': BadRequest,  # INVALID_NUM_FORMAT Invalid number input
                    '100101': ExchangeError,  # UNKNOWN_ERROR Some unknown error
                    '150001': BadRequest,  # INVALID_JSON_FORMAT Require a valid json object
                    '200001': AuthenticationError,  # AUTHENTICATION_FAILED Authorization failed
                    '200002': ExchangeError,  # TOO_MANY_ATTEMPTS Tried and failed too many times
                    '200003': ExchangeError,  # ACCOUNT_NOT_FOUND Account not exist
                    '200004': ExchangeError,  # ACCOUNT_NOT_SETUP Account not setup properly
                    '200005': ExchangeError,  # ACCOUNT_ALREADY_EXIST Account already exist
                    '200006': ExchangeError,  # ACCOUNT_ERROR Some error related with error
                    '200007': ExchangeError,  # CODE_NOT_FOUND
                    '200008': ExchangeError,  # CODE_EXPIRED Code expired
                    '200009': ExchangeError,  # CODE_MISMATCH Code does not match
                    '200010': AuthenticationError,  # PASSWORD_ERROR Wrong assword
                    '200011': ExchangeError,  # CODE_GEN_FAILED Do not generate required code promptly
                    '200012': ExchangeError,  # FAKE_COKE_VERIFY
                    '200013': ExchangeError,  # SECURITY_ALERT Provide security alert message
                    '200014': PermissionDenied,  # RESTRICTED_ACCOUNT Account is restricted for certain activity, such as trading, or withdraw.
                    '200015': PermissionDenied,  # PERMISSION_DENIED No enough permission for the operation
                    '300001': InvalidOrder,  # INVALID_PRICE Order price is invalid
                    '300002': InvalidOrder,  # INVALID_QTY Order size is invalid
                    '300003': InvalidOrder,  # INVALID_SIDE Order side is invalid
                    '300004': InvalidOrder,  # INVALID_NOTIONAL Notional is too small or too large
                    '300005': InvalidOrder,  # INVALID_TYPE Order typs is invalid
                    '300006': InvalidOrder,  # INVALID_ORDER_ID Order id is invalid
                    '300007': InvalidOrder,  # INVALID_TIME_IN_FORCE Time In Force in order request is invalid
                    '300008': InvalidOrder,  # INVALID_ORDER_PARAMETER Some order parameter is invalid
                    '300009': InvalidOrder,  # TRADING_VIOLATION Trading violation on account or asset
                    '300011': InsufficientFunds,  # INVALID_BALANCE No enough account or asset balance for the trading
                    '300012': BadSymbol,  # INVALID_PRODUCT Not a valid product supported by exchange
                    '300013': InvalidOrder,  # INVALID_BATCH_ORDER Some or all orders are invalid in batch order request
                    '300020': InvalidOrder,  # TRADING_RESTRICTED There is some trading restriction on account or asset
                    '300021': InvalidOrder,  # TRADING_DISABLED Trading is disabled on account or asset
                    '300031': InvalidOrder,  # NO_MARKET_PRICE No market price for market type order trading
                    '310001': InsufficientFunds,  # INVALID_MARGIN_BALANCE No enough margin balance
                    '310002': InvalidOrder,  # INVALID_MARGIN_ACCOUNT Not a valid account for margin trading
                    '310003': InvalidOrder,  # MARGIN_TOO_RISKY Leverage is too high
                    '310004': BadSymbol,  # INVALID_MARGIN_ASSET This asset does not support margin trading
                    '310005': InvalidOrder,  # INVALID_REFERENCE_PRICE There is no valid reference price
                    '510001': ExchangeError,  # SERVER_ERROR Something wrong with server.
                    '900001': ExchangeError,  # HUMAN_CHALLENGE Human change do not pass
                },
                'broad': {},
            },
            'commonCurrencies': {
                'BOND': 'BONDED',
                'BTCBEAR': 'BEAR',
                'BTCBULL': 'BULL',
                'BYN': 'Beyond Finance',
            },
        })

    def get_account(self, params={}):
        # get current or provided bitmax sub-account
        account = self.safe_value(params, 'account', self.options['account'])
        return account.lower().capitalize()

    async def fetch_currencies(self, params={}):
        assets = await self.publicGetAssets(params)
        #
        #     {
        #         "code":0,
        #         "data":[
        #             {
        #                 "assetCode" : "LTCBULL",
        #                 "assetName" : "3X Long LTC Token",
        #                 "precisionScale" : 9,
        #                 "nativeScale" : 4,
        #                 "withdrawalFee" : "0.2",
        #                 "minWithdrawalAmt" : "1.0",
        #                 "status" : "Normal"
        #             },
        #         ]
        #     }
        #
        margin = await self.publicGetMarginAssets(params)
        #
        #     {
        #         "code":0,
        #         "data":[
        #             {
        #                 "assetCode":"BTT",
        #                 "borrowAssetCode":"BTT-B",
        #                 "interestAssetCode":"BTT-I",
        #                 "nativeScale":0,
        #                 "numConfirmations":1,
        #                 "withdrawFee":"100.0",
        #                 "minWithdrawalAmt":"1000.0",
        #                 "statusCode":"Normal",
        #                 "statusMessage":"",
        #                 "interestRate":"0.001"
        #             }
        #         ]
        #     }
        #
        cash = await self.publicGetCashAssets(params)
        #
        #     {
        #         "code":0,
        #         "data":[
        #             {
        #                 "assetCode":"LTCBULL",
        #                 "nativeScale":4,
        #                 "numConfirmations":20,
        #                 "withdrawFee":"0.2",
        #                 "minWithdrawalAmt":"1.0",
        #                 "statusCode":"Normal",
        #                 "statusMessage":""
        #             }
        #         ]
        #     }
        #
        assetsData = self.safe_value(assets, 'data', [])
        marginData = self.safe_value(margin, 'data', [])
        cashData = self.safe_value(cash, 'data', [])
        assetsById = self.index_by(assetsData, 'assetCode')
        marginById = self.index_by(marginData, 'assetCode')
        cashById = self.index_by(cashData, 'assetCode')
        dataById = self.deep_extend(assetsById, marginById, cashById)
        ids = list(dataById.keys())
        result = {}
        for i in range(0, len(ids)):
            id = ids[i]
            currency = dataById[id]
            code = self.safe_currency_code(id)
            precision = self.safe_integer_2(currency, 'precisionScale', 'nativeScale')
            # why would the exchange API have different names for the same field
            fee = self.safe_number_2(currency, 'withdrawFee', 'withdrawalFee')
            status = self.safe_string_2(currency, 'status', 'statusCode')
            active = (status == 'Normal')
            margin = ('borrowAssetCode' in currency)
            result[code] = {
                'id': id,
                'code': code,
                'info': currency,
                'type': None,
                'margin': margin,
                'name': self.safe_string(currency, 'assetName'),
                'active': active,
                'fee': fee,
                'precision': precision,
                'limits': {
                    'amount': {
                        'min': math.pow(10, -precision),
                        'max': None,
                    },
                    'withdraw': {
                        'min': self.safe_number(currency, 'minWithdrawalAmt'),
                        'max': None,
                    },
                },
            }
        return result

    async def fetch_markets(self, params={}):
        products = await self.publicGetProducts(params)
        #
        #     {
        #         "code":0,
        #         "data":[
        #             {
        #                 "symbol":"LBA/BTC",
        #                 "baseAsset":"LBA",
        #                 "quoteAsset":"BTC",
        #                 "status":"Normal",
        #                 "minNotional":"0.000625",
        #                 "maxNotional":"6.25",
        #                 "marginTradable":false,
        #                 "commissionType":"Quote",
        #                 "commissionReserveRate":"0.001",
        #                 "tickSize":"0.000000001",
        #                 "lotSize":"1"
        #             },
        #         ]
        #     }
        #
        cash = await self.publicGetCashProducts(params)
        #
        #     {
        #         "code":0,
        #         "data":[
        #             {
        #                 "symbol":"QTUM/BTC",
        #                 "domain":"BTC",
        #                 "tradingStartTime":1569506400000,
        #                 "collapseDecimals":"0.0001,0.000001,0.00000001",
        #                 "minQty":"0.000000001",
        #                 "maxQty":"1000000000",
        #                 "minNotional":"0.000625",
        #                 "maxNotional":"12.5",
        #                 "statusCode":"Normal",
        #                 "statusMessage":"",
        #                 "tickSize":"0.00000001",
        #                 "useTick":false,
        #                 "lotSize":"0.1",
        #                 "useLot":false,
        #                 "commissionType":"Quote",
        #                 "commissionReserveRate":"0.001",
        #                 "qtyScale":1,
        #                 "priceScale":8,
        #                 "notionalScale":4
        #             }
        #         ]
        #     }
        #
        futures = await self.publicGetFuturesContracts(params)
        #
        #     {
        #         "code":0,
        #         "data":[
        #             {
        #                 "symbol":"BTC-PERP",
        #                 "tradingStartTime":1579701600000,
        #                 "collapseDecimals":"1,0.1,0.01",
        #                 "minQty":"0.000000001",
        #                 "maxQty":"1000000000",
        #                 "minNotional":"5",
        #                 "maxNotional":"1000000",
        #                 "statusCode":"Normal",
        #                 "statusMessage":"",
        #                 "tickSize":"0.25",
        #                 "lotSize":"0.0001",
        #                 "priceScale":2,
        #                 "qtyScale":4,
        #                 "notionalScale":2
        #             }
        #         ]
        #     }
        #
        productsData = self.safe_value(products, 'data', [])
        productsById = self.index_by(productsData, 'symbol')
        cashData = self.safe_value(cash, 'data', [])
        futuresData = self.safe_value(futures, 'data', [])
        cashAndFuturesData = self.array_concat(cashData, futuresData)
        cashAndFuturesById = self.index_by(cashAndFuturesData, 'symbol')
        dataById = self.deep_extend(productsById, cashAndFuturesById)
        ids = list(dataById.keys())
        result = []
        for i in range(0, len(ids)):
            id = ids[i]
            market = dataById[id]
            baseId = self.safe_string(market, 'baseAsset')
            quoteId = self.safe_string(market, 'quoteAsset')
            base = self.safe_currency_code(baseId)
            quote = self.safe_currency_code(quoteId)
            precision = {
                'amount': self.safe_number(market, 'lotSize'),
                'price': self.safe_number(market, 'tickSize'),
            }
            status = self.safe_string(market, 'status')
            active = (status == 'Normal')
            type = 'spot' if ('useLot' in market) else 'future'
            spot = (type == 'spot')
            future = (type == 'future')
            symbol = id
            if not future:
                symbol = base + '/' + quote
            result.append({
                'id': id,
                'symbol': symbol,
                'base': base,
                'quote': quote,
                'baseId': baseId,
                'quoteId': quoteId,
                'info': market,
                'type': type,
                'spot': spot,
                'future': future,
                'active': active,
                'precision': precision,
                'limits': {
                    'amount': {
                        'min': self.safe_number(market, 'minQty'),
                        'max': self.safe_number(market, 'maxQty'),
                    },
                    'price': {
                        'min': self.safe_number(market, 'tickSize'),
                        'max': None,
                    },
                    'cost': {
                        'min': self.safe_number(market, 'minNotional'),
                        'max': self.safe_number(market, 'maxNotional'),
                    },
                },
            })
        return result

    async def fetch_accounts(self, params={}):
        accountGroup = self.safe_string(self.options, 'account-group')
        response = None
        if accountGroup is None:
            response = await self.privateGetInfo(params)
            #
            #     {
            #         "code":0,
            #         "data":{
            #             "email":"igor.kroitor@gmail.com",
            #             "accountGroup":8,
            #             "viewPermission":true,
            #             "tradePermission":true,
            #             "transferPermission":true,
            #             "cashAccount":["cshrHKLZCjlZ2ejqkmvIHHtPmLYqdnda"],
            #             "marginAccount":["martXoh1v1N3EMQC5FDtSj5VHso8aI2Z"],
            #             "futuresAccount":["futc9r7UmFJAyBY2rE3beA2JFxav2XFF"],
            #             "userUID":"U6491137460"
            #         }
            #     }
            #
            data = self.safe_value(response, 'data', {})
            accountGroup = self.safe_string(data, 'accountGroup')
            self.options['account-group'] = accountGroup
        return [
            {
                'id': accountGroup,
                'type': None,
                'currency': None,
                'info': response,
            },
        ]

    async def fetch_balance(self, params={}):
        await self.load_markets()
        await self.load_accounts()
        defaultAccountCategory = self.safe_string(self.options, 'account-category', 'cash')
        options = self.safe_value(self.options, 'fetchBalance', {})
        accountCategory = self.safe_string(options, 'account-category', defaultAccountCategory)
        accountCategory = self.safe_string(params, 'account-category', accountCategory)
        params = self.omit(params, 'account-category')
        account = self.safe_value(self.accounts, 0, {})
        accountGroup = self.safe_string(account, 'id')
        request = {
            'account-group': accountGroup,
        }
        method = 'accountCategoryGetBalance'
        if accountCategory == 'futures':
            method = 'accountGroupGetFuturesCollateralBalance'
        else:
            request['account-category'] = accountCategory
        response = await getattr(self, method)(self.extend(request, params))
        #
        # cash
        #
        #     {
        #         'code': 0,
        #         'data': [
        #             {
        #                 'asset': 'BCHSV',
        #                 'totalBalance': '64.298000048',
        #                 'availableBalance': '64.298000048',
        #             },
        #         ]
        #     }
        #
        # margin
        #
        #     {
        #         'code': 0,
        #         'data': [
        #             {
        #                 'asset': 'BCHSV',
        #                 'totalBalance': '64.298000048',
        #                 'availableBalance': '64.298000048',
        #                 'borrowed': '0',
        #                 'interest': '0',
        #             },
        #         ]
        #     }
        #
        # futures
        #
        #     {
        #         "code":0,
        #         "data":[
        #             {"asset":"BTC","totalBalance":"0","availableBalance":"0","maxTransferrable":"0","priceInUSDT":"9456.59"},
        #             {"asset":"ETH","totalBalance":"0","availableBalance":"0","maxTransferrable":"0","priceInUSDT":"235.95"},
        #             {"asset":"USDT","totalBalance":"0","availableBalance":"0","maxTransferrable":"0","priceInUSDT":"1"},
        #             {"asset":"USDC","totalBalance":"0","availableBalance":"0","maxTransferrable":"0","priceInUSDT":"1.00035"},
        #             {"asset":"PAX","totalBalance":"0","availableBalance":"0","maxTransferrable":"0","priceInUSDT":"1.00045"},
        #             {"asset":"USDTR","totalBalance":"0","availableBalance":"0","maxTransferrable":"0","priceInUSDT":"1"}
        #         ]
        #     }
        #
        result = {
            'info': response,
            'timestamp': None,
            'datetime': None,
        }
        balances = self.safe_value(response, 'data', [])
        for i in range(0, len(balances)):
            balance = balances[i]
            code = self.safe_currency_code(self.safe_string(balance, 'asset'))
            account = self.account()
            account['free'] = self.safe_string(balance, 'availableBalance')
            account['total'] = self.safe_string(balance, 'totalBalance')
            result[code] = account
        return self.parse_balance(result, False)

    async def fetch_order_book(self, symbol, limit=None, params={}):
        await self.load_markets()
        market = self.market(symbol)
        request = {
            'symbol': market['id'],
        }
        response = await self.publicGetDepth(self.extend(request, params))
        #
        #     {
        #         "code":0,
        #         "data":{
        #             "m":"depth-snapshot",
        #             "symbol":"BTC-PERP",
        #             "data":{
        #                 "ts":1590223998202,
        #                 "seqnum":115444921,
        #                 "asks":[
        #                     ["9207.5","18.2383"],
        #                     ["9207.75","18.8235"],
        #                     ["9208","10.7873"],
        #                 ],
        #                 "bids":[
        #                     ["9207.25","0.4009"],
        #                     ["9207","0.003"],
        #                     ["9206.5","0.003"],
        #                 ]
        #             }
        #         }
        #     }
        #
        data = self.safe_value(response, 'data', {})
        orderbook = self.safe_value(data, 'data', {})
        timestamp = self.safe_integer(orderbook, 'ts')
        result = self.parse_order_book(orderbook, symbol, timestamp)
        result['nonce'] = self.safe_integer(orderbook, 'seqnum')
        return result

    def parse_ticker(self, ticker, market=None):
        #
        #     {
        #         "symbol":"QTUM/BTC",
        #         "open":"0.00016537",
        #         "close":"0.00019077",
        #         "high":"0.000192",
        #         "low":"0.00016537",
        #         "volume":"846.6",
        #         "ask":["0.00018698","26.2"],
        #         "bid":["0.00018408","503.7"],
        #         "type":"spot"
        #     }
        #
        timestamp = None
        marketId = self.safe_string(ticker, 'symbol')
        symbol = None
        if marketId in self.markets_by_id:
            market = self.markets_by_id[marketId]
        elif marketId is not None:
            type = self.safe_string(ticker, 'type')
            if type == 'spot':
                baseId, quoteId = marketId.split('/')
                base = self.safe_currency_code(baseId)
                quote = self.safe_currency_code(quoteId)
                symbol = base + '/' + quote
        if (symbol is None) and (market is not None):
            symbol = market['symbol']
        close = self.safe_number(ticker, 'close')
        bid = self.safe_value(ticker, 'bid', [])
        ask = self.safe_value(ticker, 'ask', [])
        open = self.safe_number(ticker, 'open')
        change = None
        percentage = None
        average = None
        if (open is not None) and (close is not None):
            change = close - open
            if open > 0:
                percentage = change / open * 100
            average = self.sum(open, close) / 2
        return {
            'symbol': symbol,
            'timestamp': timestamp,
            'datetime': self.iso8601(timestamp),
            'high': self.safe_number(ticker, 'high'),
            'low': self.safe_number(ticker, 'low'),
            'bid': self.safe_number(bid, 0),
            'bidVolume': self.safe_number(bid, 1),
            'ask': self.safe_number(ask, 0),
            'askVolume': self.safe_number(ask, 1),
            'vwap': None,
            'open': open,
            'close': close,
            'last': close,
            'previousClose': None,  # previous day close
            'change': change,
            'percentage': percentage,
            'average': average,
            'baseVolume': self.safe_number(ticker, 'volume'),
            'quoteVolume': None,
            'info': ticker,
        }

    async def fetch_ticker(self, symbol, params={}):
        await self.load_markets()
        market = self.market(symbol)
        request = {
            'symbol': market['id'],
        }
        response = await self.publicGetTicker(self.extend(request, params))
        #
        #     {
        #         "code":0,
        #         "data":{
        #             "symbol":"BTC-PERP",  # or "BTC/USDT"
        #             "open":"9073",
        #             "close":"9185.75",
        #             "high":"9185.75",
        #             "low":"9185.75",
        #             "volume":"576.8334",
        #             "ask":["9185.75","15.5863"],
        #             "bid":["9185.5","0.003"],
        #             "type":"derivatives",  # or "spot"
        #         }
        #     }
        #
        data = self.safe_value(response, 'data', {})
        return self.parse_ticker(data, market)

    async def fetch_tickers(self, symbols=None, params={}):
        await self.load_markets()
        request = {}
        if symbols is not None:
            marketIds = self.market_ids(symbols)
            request['symbol'] = ','.join(marketIds)
        response = await self.publicGetTicker(self.extend(request, params))
        #
        #     {
        #         "code":0,
        #         "data":[
        #             {
        #                 "symbol":"QTUM/BTC",
        #                 "open":"0.00016537",
        #                 "close":"0.00019077",
        #                 "high":"0.000192",
        #                 "low":"0.00016537",
        #                 "volume":"846.6",
        #                 "ask":["0.00018698","26.2"],
        #                 "bid":["0.00018408","503.7"],
        #                 "type":"spot"
        #             }
        #         ]
        #     }
        #
        data = self.safe_value(response, 'data', [])
        return self.parse_tickers(data, symbols)

    def parse_ohlcv(self, ohlcv, market=None):
        #
        #     {
        #         "m":"bar",
        #         "s":"BTC/USDT",
        #         "data":{
        #             "i":"1",
        #             "ts":1590228000000,
        #             "o":"9139.59",
        #             "c":"9131.94",
        #             "h":"9139.99",
        #             "l":"9121.71",
        #             "v":"25.20648"
        #         }
        #     }
        #
        data = self.safe_value(ohlcv, 'data', {})
        return [
            self.safe_integer(data, 'ts'),
            self.safe_number(data, 'o'),
            self.safe_number(data, 'h'),
            self.safe_number(data, 'l'),
            self.safe_number(data, 'c'),
            self.safe_number(data, 'v'),
        ]

    async def fetch_ohlcv(self, symbol, timeframe='1m', since=None, limit=None, params={}):
        await self.load_markets()
        market = self.market(symbol)
        request = {
            'symbol': market['id'],
            'interval': self.timeframes[timeframe],
        }
        # if since and limit are not specified
        # the exchange will return just 1 last candle by default
        duration = self.parse_timeframe(timeframe)
        options = self.safe_value(self.options, 'fetchOHLCV', {})
        defaultLimit = self.safe_integer(options, 'limit', 500)
        if since is not None:
            request['from'] = since
            if limit is None:
                limit = defaultLimit
            else:
                limit = min(limit, defaultLimit)
            request['to'] = self.sum(since, limit * duration * 1000, 1)
        elif limit is not None:
            request['n'] = limit  # max 500
        response = await self.publicGetBarhist(self.extend(request, params))
        #
        #     {
        #         "code":0,
        #         "data":[
        #             {
        #                 "m":"bar",
        #                 "s":"BTC/USDT",
        #                 "data":{
        #                     "i":"1",
        #                     "ts":1590228000000,
        #                     "o":"9139.59",
        #                     "c":"9131.94",
        #                     "h":"9139.99",
        #                     "l":"9121.71",
        #                     "v":"25.20648"
        #                 }
        #             }
        #         ]
        #     }
        #
        data = self.safe_value(response, 'data', [])
        return self.parse_ohlcvs(data, market, timeframe, since, limit)

    def parse_trade(self, trade, market=None):
        #
        # public fetchTrades
        #
        #     {
        #         "p":"9128.5",  # price
        #         "q":"0.0030",  # quantity
        #         "ts":1590229002385,  # timestamp
        #         "bm":false,  # if True, the buyer is the market maker, we only use self field to "define the side" of a public trade
        #         "seqnum":180143985289898554
        #     }
        #
        timestamp = self.safe_integer(trade, 'ts')
        priceString = self.safe_string_2(trade, 'price', 'p')
        amountString = self.safe_string(trade, 'q')
        price = self.parse_number(priceString)
        amount = self.parse_number(amountString)
        cost = self.parse_number(Precise.string_mul(priceString, amountString))
        buyerIsMaker = self.safe_value(trade, 'bm', False)
        makerOrTaker = 'maker' if buyerIsMaker else 'taker'
        side = 'buy' if buyerIsMaker else 'sell'
        symbol = None
        if (symbol is None) and (market is not None):
            symbol = market['symbol']
        return {
            'info': trade,
            'timestamp': timestamp,
            'datetime': self.iso8601(timestamp),
            'symbol': symbol,
            'id': None,
            'order': None,
            'type': None,
            'takerOrMaker': makerOrTaker,
            'side': side,
            'price': price,
            'amount': amount,
            'cost': cost,
            'fee': None,
        }

    async def fetch_trades(self, symbol, since=None, limit=None, params={}):
        await self.load_markets()
        market = self.market(symbol)
        request = {
            'symbol': market['id'],
        }
        if limit is not None:
            request['n'] = limit  # max 100
        response = await self.publicGetTrades(self.extend(request, params))
        #
        #     {
        #         "code":0,
        #         "data":{
        #             "m":"trades",
        #             "symbol":"BTC-PERP",
        #             "data":[
        #                 {"p":"9128.5","q":"0.0030","ts":1590229002385,"bm":false,"seqnum":180143985289898554},
        #                 {"p":"9129","q":"0.0030","ts":1590229002642,"bm":false,"seqnum":180143985289898587},
        #                 {"p":"9129.5","q":"0.0030","ts":1590229021306,"bm":false,"seqnum":180143985289899043}
        #             ]
        #         }
        #     }
        #
        records = self.safe_value(response, 'data', [])
        trades = self.safe_value(records, 'data', [])
        return self.parse_trades(trades, market, since, limit)

    def parse_order_status(self, status):
        statuses = {
            'PendingNew': 'open',
            'New': 'open',
            'PartiallyFilled': 'open',
            'Filled': 'closed',
            'Canceled': 'canceled',
            'Rejected': 'rejected',
        }
        return self.safe_string(statuses, status, status)

    def parse_order(self, order, market=None):
        #
        # createOrder
        #
        #     {
        #         "id": "16e607e2b83a8bXHbAwwoqDo55c166fa",
        #         "orderId": "16e85b4d9b9a8bXHbAwwoqDoc3d66830",
        #         "orderType": "Market",
        #         "symbol": "BTC/USDT",
        #         "timestamp": 1573576916201
        #     }
        #
        # fetchOrder, fetchOpenOrders, fetchClosedOrders
        #
        #     {
        #         "symbol":       "BTC/USDT",
        #         "price":        "8131.22",
        #         "orderQty":     "0.00082",
        #         "orderType":    "Market",
        #         "avgPx":        "7392.02",
        #         "cumFee":       "0.005152238",
        #         "cumFilledQty": "0.00082",
        #         "errorCode":    "",
        #         "feeAsset":     "USDT",
        #         "lastExecTime": 1575953151764,
        #         "orderId":      "a16eee20b6750866943712zWEDdAjt3",
        #         "seqNum":       2623469,
        #         "side":         "Buy",
        #         "status":       "Filled",
        #         "stopPrice":    "",
        #         "execInst":     "NULL_VAL"
        #     }
        #
        #     {
        #         "ac": "FUTURES",
        #         "accountId": "testabcdefg",
        #         "avgPx": "0",
        #         "cumFee": "0",
        #         "cumQty": "0",
        #         "errorCode": "NULL_VAL",
        #         "execInst": "NULL_VAL",
        #         "feeAsset": "USDT",
        #         "lastExecTime": 1584072844085,
        #         "orderId": "r170d21956dd5450276356bbtcpKa74",
        #         "orderQty": "1.1499",
        #         "orderType": "Limit",
        #         "price": "4000",
        #         "sendingTime": 1584072841033,
        #         "seqNum": 24105338,
        #         "side": "Buy",
        #         "status": "Canceled",
        #         "stopPrice": "",
        #         "symbol": "BTC-PERP"
        #     },
        #
        status = self.parse_order_status(self.safe_string(order, 'status'))
        marketId = self.safe_string(order, 'symbol')
        symbol = self.safe_symbol(marketId, market, '/')
        timestamp = self.safe_integer_2(order, 'timestamp', 'sendingTime')
        lastTradeTimestamp = self.safe_integer(order, 'lastExecTime')
        price = self.safe_number(order, 'price')
        amount = self.safe_number(order, 'orderQty')
        average = self.safe_number(order, 'avgPx')
        filled = self.safe_number_2(order, 'cumFilledQty', 'cumQty')
        id = self.safe_string(order, 'orderId')
        clientOrderId = self.safe_string(order, 'id')
        if clientOrderId is not None:
            if len(clientOrderId) < 1:
                clientOrderId = None
        type = self.safe_string_lower(order, 'orderType')
        side = self.safe_string_lower(order, 'side')
        feeCost = self.safe_number(order, 'cumFee')
        fee = None
        if feeCost is not None:
            feeCurrencyId = self.safe_string(order, 'feeAsset')
            feeCurrencyCode = self.safe_currency_code(feeCurrencyId)
            fee = {
                'cost': feeCost,
                'currency': feeCurrencyCode,
            }
        stopPrice = self.safe_number(order, 'stopPrice')
        return self.safe_order({
            'info': order,
            'id': id,
            'clientOrderId': None,
            'timestamp': timestamp,
            'datetime': self.iso8601(timestamp),
            'lastTradeTimestamp': lastTradeTimestamp,
            'symbol': symbol,
            'type': type,
            'timeInForce': None,
            'postOnly': None,
            'side': side,
            'price': price,
            'stopPrice': stopPrice,
            'amount': amount,
            'cost': None,
            'average': average,
            'filled': filled,
            'remaining': None,
            'status': status,
            'fee': fee,
            'trades': None,
        })

    async def create_order(self, symbol, type, side, amount, price=None, params={}):
        await self.load_markets()
        await self.load_accounts()
        market = self.market(symbol)
        defaultAccountCategory = self.safe_string(self.options, 'account-category', 'cash')
        options = self.safe_value(self.options, 'createOrder', {})
        accountCategory = self.safe_string(options, 'account-category', defaultAccountCategory)
        accountCategory = self.safe_string(params, 'account-category', accountCategory)
        params = self.omit(params, 'account-category')
        account = self.safe_value(self.accounts, 0, {})
        accountGroup = self.safe_value(account, 'id')
        clientOrderId = self.safe_string_2(params, 'clientOrderId', 'id')
        request = {
            'account-group': accountGroup,
            'account-category': accountCategory,
            'symbol': market['id'],
            'time': self.milliseconds(),
            'orderQty': self.amount_to_precision(symbol, amount),
            'orderType': type,  # "limit", "market", "stop_market", "stop_limit"
            'side': side,  # "buy" or "sell"
            # 'orderPrice': self.price_to_precision(symbol, price),
            # 'stopPrice': self.price_to_precision(symbol, stopPrice),  # required for stop orders
            # 'postOnly': 'false',  # 'false', 'true'
            # 'timeInForce': 'GTC',  # GTC, IOC, FOK
            # 'respInst': 'ACK',  # ACK, 'ACCEPT, DONE
        }
        if clientOrderId is not None:
            request['id'] = clientOrderId
            params = self.omit(params, ['clientOrderId', 'id'])
        if (type == 'limit') or (type == 'stop_limit'):
            request['orderPrice'] = self.price_to_precision(symbol, price)
        if (type == 'stop_limit') or (type == 'stop_market'):
            stopPrice = self.safe_number(params, 'stopPrice')
            if stopPrice is None:
                raise InvalidOrder(self.id + ' createOrder() requires a stopPrice parameter for ' + type + ' orders')
            else:
                request['stopPrice'] = self.price_to_precision(symbol, stopPrice)
                params = self.omit(params, 'stopPrice')
        response = await self.accountCategoryPostOrder(self.extend(request, params))
        #
        #     {
        #         "code": 0,
        #         "data": {
        #             "ac": "MARGIN",
        #             "accountId": "cshQtyfq8XLAA9kcf19h8bXHbAwwoqDo",
        #             "action": "place-order",
        #             "info": {
        #                 "id": "16e607e2b83a8bXHbAwwoqDo55c166fa",
        #                 "orderId": "16e85b4d9b9a8bXHbAwwoqDoc3d66830",
        #                 "orderType": "Market",
        #                 "symbol": "BTC/USDT",
        #                 "timestamp": 1573576916201
        #             },
        #             "status": "Ack"
        #         }
        #     }
        #
        data = self.safe_value(response, 'data', {})
        info = self.safe_value(data, 'info', {})
        return self.parse_order(info, market)

    async def fetch_order(self, id, symbol=None, params={}):
        await self.load_markets()
        await self.load_accounts()
        defaultAccountCategory = self.safe_string(self.options, 'account-category', 'cash')
        options = self.safe_value(self.options, 'fetchOrder', {})
        accountCategory = self.safe_string(options, 'account-category', defaultAccountCategory)
        accountCategory = self.safe_string(params, 'account-category', accountCategory)
        params = self.omit(params, 'account-category')
        account = self.safe_value(self.accounts, 0, {})
        accountGroup = self.safe_value(account, 'id')
        request = {
            'account-group': accountGroup,
            'account-category': accountCategory,
            'orderId': id,
        }
        response = await self.accountCategoryGetOrderStatus(self.extend(request, params))
        #
        #     {
        #         "code": 0,
        #         "accountCategory": "CASH",
        #         "accountId": "cshQtyfq8XLAA9kcf19h8bXHbAwwoqDo",
        #         "data": [
        #             {
        #                 "symbol":       "BTC/USDT",
        #                 "price":        "8131.22",
        #                 "orderQty":     "0.00082",
        #                 "orderType":    "Market",
        #                 "avgPx":        "7392.02",
        #                 "cumFee":       "0.005152238",
        #                 "cumFilledQty": "0.00082",
        #                 "errorCode":    "",
        #                 "feeAsset":     "USDT",
        #                 "lastExecTime": 1575953151764,
        #                 "orderId":      "a16eee20b6750866943712zWEDdAjt3",
        #                 "seqNum":       2623469,
        #                 "side":         "Buy",
        #                 "status":       "Filled",
        #                 "stopPrice":    "",
        #                 "execInst":     "NULL_VAL"
        #             }
        #         ]
        #     }
        #
        data = self.safe_value(response, 'data', {})
        return self.parse_order(data)

    async def fetch_open_orders(self, symbol=None, since=None, limit=None, params={}):
        await self.load_markets()
        await self.load_accounts()
        market = None
        if symbol is not None:
            market = self.market(symbol)
        defaultAccountCategory = self.safe_string(self.options, 'account-category', 'cash')
        options = self.safe_value(self.options, 'fetchOpenOrders', {})
        accountCategory = self.safe_string(options, 'account-category', defaultAccountCategory)
        accountCategory = self.safe_string(params, 'account-category', accountCategory)
        params = self.omit(params, 'account-category')
        account = self.safe_value(self.accounts, 0, {})
        accountGroup = self.safe_value(account, 'id')
        request = {
            'account-group': accountGroup,
            'account-category': accountCategory,
        }
        response = await self.accountCategoryGetOrderOpen(self.extend(request, params))
        #
        #     {
        #         "ac": "CASH",
        #         "accountId": "cshQtyfq8XLAA9kcf19h8bXHbAwwoqDo",
        #         "code": 0,
        #         "data": [
        #             {
        #                 "avgPx": "0",         # Average filled price of the order
        #                 "cumFee": "0",       # cumulative fee paid for self order
        #                 "cumFilledQty": "0",  # cumulative filled quantity
        #                 "errorCode": "",     # error code; could be empty
        #                 "feeAsset": "USDT",  # fee asset
        #                 "lastExecTime": 1576019723550,  #  The last execution time of the order
        #                 "orderId": "s16ef21882ea0866943712034f36d83",  # server provided orderId
        #                 "orderQty": "0.0083",  # order quantity
        #                 "orderType": "Limit",  # order type
        #                 "price": "7105",       # order price
        #                 "seqNum": 8193258,     # sequence number
        #                 "side": "Buy",         # order side
        #                 "status": "New",       # order status on matching engine
        #                 "stopPrice": "",       # only available for stop market and stop limit orders; otherwise empty
        #                 "symbol": "BTC/USDT",
        #                 "execInst": "NULL_VAL"  # execution instruction
        #             },
        #         ]
        #     }
        #
        data = self.safe_value(response, 'data', [])
        if accountCategory == 'futures':
            return self.parse_orders(data, market, since, limit)
        # a workaround for https://github.com/ccxt/ccxt/issues/7187
        orders = []
        for i in range(0, len(data)):
            order = self.parse_order(data[i], market)
            orders.append(order)
        return self.filter_by_symbol_since_limit(orders, symbol, since, limit)

    async def fetch_closed_orders(self, symbol=None, since=None, limit=None, params={}):
        await self.load_markets()
        await self.load_accounts()
        market = None
        if symbol is not None:
            market = self.market(symbol)
        defaultAccountCategory = self.safe_string(self.options, 'account-category')
        options = self.safe_value(self.options, 'fetchClosedOrders', {})
        accountCategory = self.safe_string(options, 'account-category', defaultAccountCategory)
        accountCategory = self.safe_string(params, 'account-category', accountCategory)
        params = self.omit(params, 'account-category')
        account = self.safe_value(self.accounts, 0, {})
        accountGroup = self.safe_value(account, 'id')
        request = {
            'account-group': accountGroup,
            # 'category': accountCategory,
            # 'symbol': market['id'],
            # 'orderType': 'market',  # optional, string
            # 'side': 'buy',  # or 'sell', optional, case insensitive.
            # 'status': 'Filled',  # "Filled", "Canceled", or "Rejected"
            # 'startTime': exchange.milliseconds(),
            # 'endTime': exchange.milliseconds(),
            # 'page': 1,
            # 'pageSize': 100,
        }
        if symbol is not None:
            market = self.market(symbol)
            request['symbol'] = market['id']
        method = self.safe_value(options, 'method', 'accountGroupGetOrderHist')
        if method == 'accountGroupGetOrderHist':
            if accountCategory is not None:
                request['category'] = accountCategory
        else:
            request['account-category'] = accountCategory
        if since is not None:
            request['startTime'] = since
        if limit is not None:
            request['pageSize'] = limit
        response = await getattr(self, method)(self.extend(request, params))
        #
        # accountCategoryGetOrderHistCurrent
        #
        #     {
        #         "code":0,
        #         "accountId":"cshrHKLZCjlZ2ejqkmvIHHtPmLYqdnda",
        #         "ac":"CASH",
        #         "data":[
        #             {
        #                 "seqNum":15561826728,
        #                 "orderId":"a17294d305c0U6491137460bethu7kw9",
        #                 "symbol":"ETH/USDT",
        #                 "orderType":"Limit",
        #                 "lastExecTime":1591635618200,
        #                 "price":"200",
        #                 "orderQty":"0.1",
        #                 "side":"Buy",
        #                 "status":"Canceled",
        #                 "avgPx":"0",
        #                 "cumFilledQty":"0",
        #                 "stopPrice":"",
        #                 "errorCode":"",
        #                 "cumFee":"0",
        #                 "feeAsset":"USDT",
        #                 "execInst":"NULL_VAL"
        #             }
        #         ]
        #     }
        #
        # accountGroupGetOrderHist
        #
        #     {
        #         "code": 0,
        #         "data": {
        #             "data": [
        #                 {
        #                     "ac": "FUTURES",
        #                     "accountId": "testabcdefg",
        #                     "avgPx": "0",
        #                     "cumFee": "0",
        #                     "cumQty": "0",
        #                     "errorCode": "NULL_VAL",
        #                     "execInst": "NULL_VAL",
        #                     "feeAsset": "USDT",
        #                     "lastExecTime": 1584072844085,
        #                     "orderId": "r170d21956dd5450276356bbtcpKa74",
        #                     "orderQty": "1.1499",
        #                     "orderType": "Limit",
        #                     "price": "4000",
        #                     "sendingTime": 1584072841033,
        #                     "seqNum": 24105338,
        #                     "side": "Buy",
        #                     "status": "Canceled",
        #                     "stopPrice": "",
        #                     "symbol": "BTC-PERP"
        #                 },
        #             ],
        #             "hasNext": False,
        #             "limit": 500,
        #             "page": 1,
        #             "pageSize": 20
        #         }
        #     }
        #
        data = self.safe_value(response, 'data')
        isArray = isinstance(data, list)
        if not isArray:
            data = self.safe_value(data, 'data', [])
        return self.parse_orders(data, market, since, limit)

    async def cancel_order(self, id, symbol=None, params={}):
        if symbol is None:
            raise ArgumentsRequired(self.id + ' cancelOrder() requires a symbol argument')
        await self.load_markets()
        await self.load_accounts()
        market = self.market(symbol)
        defaultAccountCategory = self.safe_string(self.options, 'account-category', 'cash')
        options = self.safe_value(self.options, 'cancelOrder', {})
        accountCategory = self.safe_string(options, 'account-category', defaultAccountCategory)
        accountCategory = self.safe_string(params, 'account-category', accountCategory)
        params = self.omit(params, 'account-category')
        account = self.safe_value(self.accounts, 0, {})
        accountGroup = self.safe_value(account, 'id')
        clientOrderId = self.safe_string_2(params, 'clientOrderId', 'id')
        request = {
            'account-group': accountGroup,
            'account-category': accountCategory,
            'symbol': market['id'],
            'time': self.milliseconds(),
            'id': 'foobar',
        }
        if clientOrderId is None:
            request['orderId'] = id
        else:
            request['id'] = clientOrderId
            params = self.omit(params, ['clientOrderId', 'id'])
        response = await self.accountCategoryDeleteOrder(self.extend(request, params))
        #
        #     {
        #         "code": 0,
        #         "data": {
        #             "accountId": "cshQtyfq8XLAA9kcf19h8bXHbAwwoqDo",
        #             "ac": "CASH",
        #             "action": "cancel-order",
        #             "status": "Ack",
        #             "info": {
        #                 "id":        "wv8QGquoeamhssvQBeHOHGQCGlcBjj23",
        #                 "orderId":   "16e6198afb4s8bXHbAwwoqDo2ebc19dc",
        #                 "orderType": "",  # could be empty
        #                 "symbol":    "ETH/USDT",
        #                 "timestamp":  1573594877822
        #             }
        #         }
        #     }
        #
        data = self.safe_value(response, 'data', {})
        info = self.safe_value(data, 'info', {})
        return self.parse_order(info, market)

    async def cancel_all_orders(self, symbol=None, params={}):
        await self.load_markets()
        await self.load_accounts()
        defaultAccountCategory = self.safe_string(self.options, 'account-category', 'cash')
        options = self.safe_value(self.options, 'cancelAllOrders', {})
        accountCategory = self.safe_string(options, 'account-category', defaultAccountCategory)
        accountCategory = self.safe_string(params, 'account-category', accountCategory)
        params = self.omit(params, 'account-category')
        account = self.safe_value(self.accounts, 0, {})
        accountGroup = self.safe_value(account, 'id')
        request = {
            'account-group': accountGroup,
            'account-category': accountCategory,
            'time': self.milliseconds(),
        }
        market = None
        if symbol is not None:
            market = self.market(symbol)
            request['symbol'] = market['id']
        response = await self.accountCategoryDeleteOrderAll(self.extend(request, params))
        #
        #     {
        #         "code": 0,
        #         "data": {
        #             "ac": "CASH",
        #             "accountId": "cshQtyfq8XLAA9kcf19h8bXHbAwwoqDo",
        #             "action": "cancel-all",
        #             "info": {
        #                 "id":  "2bmYvi7lyTrneMzpcJcf2D7Pe9V1P9wy",
        #                 "orderId": "",
        #                 "orderType": "NULL_VAL",
        #                 "symbol": "",
        #                 "timestamp": 1574118495462
        #             },
        #             "status": "Ack"
        #         }
        #     }
        #
        return response

    def parse_deposit_address(self, depositAddress, currency=None):
        #
        #     {
        #         address: "0xe7c70b4e73b6b450ee46c3b5c0f5fb127ca55722",
        #         destTag: "",
        #         tagType: "",
        #         tagId: "",
        #         chainName: "ERC20",
        #         numConfirmations: 20,
        #         withdrawalFee: 1,
        #         nativeScale: 4,
        #         tips: []
        #     }
        #
        address = self.safe_string(depositAddress, 'address')
        tagId = self.safe_string(depositAddress, 'tagId')
        tag = self.safe_string(depositAddress, tagId)
        self.check_address(address)
        code = None if (currency is None) else currency['code']
        return {
            'currency': code,
            'address': address,
            'tag': tag,
            'info': depositAddress,
        }

    async def fetch_deposit_address(self, code, params={}):
        await self.load_markets()
        currency = self.currency(code)
        chainName = self.safe_string(params, 'chainName')
        params = self.omit(params, 'chainName')
        request = {
            'asset': currency['id'],
        }
        response = await self.privateGetWalletDepositAddress(self.extend(request, params))
        #
        #     {
        #         "code":0,
        #         "data":{
        #             "asset":"USDT",
        #             "assetName":"Tether",
        #             "address":[
        #                 {
        #                     "address":"1N22odLHXnLPCjC8kwBJPTayarr9RtPod6",
        #                     "destTag":"",
        #                     "tagType":"",
        #                     "tagId":"",
        #                     "chainName":"Omni",
        #                     "numConfirmations":3,
        #                     "withdrawalFee":4.7,
        #                     "nativeScale":4,
        #                     "tips":[]
        #                 },
        #                 {
        #                     "address":"0xe7c70b4e73b6b450ee46c3b5c0f5fb127ca55722",
        #                     "destTag":"",
        #                     "tagType":"",
        #                     "tagId":"",
        #                     "chainName":"ERC20",
        #                     "numConfirmations":20,
        #                     "withdrawalFee":1.0,
        #                     "nativeScale":4,
        #                     "tips":[]
        #                 }
        #             ]
        #         }
        #     }
        #
        data = self.safe_value(response, 'data', {})
        addresses = self.safe_value(data, 'address', [])
        numAddresses = len(addresses)
        address = None
        if numAddresses > 1:
            addressesByChainName = self.index_by(addresses, 'chainName')
            if chainName is None:
                chainNames = list(addressesByChainName.keys())
                chains = ', '.join(chainNames)
                raise ArgumentsRequired(self.id + ' fetchDepositAddress returned more than one address, a chainName parameter is required, one of ' + chains)
            address = self.safe_value(addressesByChainName, chainName, {})
        else:
            # first address
            address = self.safe_value(addresses, 0, {})
        result = self.parse_deposit_address(address, currency)
        return self.extend(result, {
            'info': response,
        })

    async def fetch_deposits(self, code=None, since=None, limit=None, params={}):
        request = {
            'txType': 'deposit',
        }
        return await self.fetch_transactions(code, since, limit, self.extend(request, params))

    async def fetch_withdrawals(self, code=None, since=None, limit=None, params={}):
        request = {
            'txType': 'withdrawal',
        }
        return await self.fetch_transactions(code, since, limit, self.extend(request, params))

    async def fetch_transactions(self, code=None, since=None, limit=None, params={}):
        await self.load_markets()
        request = {
            # 'asset': currency['id'],
            # 'page': 1,
            # 'pageSize': 20,
            # 'startTs': self.milliseconds(),
            # 'endTs': self.milliseconds(),
            # 'txType': undefned,  # deposit, withdrawal
        }
        currency = None
        if code is not None:
            currency = self.currency(code)
            request['asset'] = currency['id']
        if since is not None:
            request['startTs'] = since
        if limit is not None:
            request['pageSize'] = limit
        response = await self.privateGetWalletTransactions(self.extend(request, params))
        #
        #     {
        #         code: 0,
        #         data: {
        #             data: [
        #                 {
        #                     requestId: "wuzd1Ojsqtz4bCA3UXwtUnnJDmU8PiyB",
        #                     time: 1591606166000,
        #                     asset: "USDT",
        #                     transactionType: "deposit",
        #                     amount: "25",
        #                     commission: "0",
        #                     networkTransactionId: "0xbc4eabdce92f14dbcc01d799a5f8ca1f02f4a3a804b6350ea202be4d3c738fce",
        #                     status: "pending",
        #                     numConfirmed: 8,
        #                     numConfirmations: 20,
        #                     destAddress: {address: "0xe7c70b4e73b6b450ee46c3b5c0f5fb127ca55722"}
        #                 }
        #             ],
        #             page: 1,
        #             pageSize: 20,
        #             hasNext: False
        #         }
        #     }
        #
        data = self.safe_value(response, 'data', {})
        transactions = self.safe_value(data, 'data', [])
        return self.parse_transactions(transactions, currency, since, limit)

    def parse_transaction_status(self, status):
        statuses = {
            'reviewing': 'pending',
            'pending': 'pending',
            'confirmed': 'ok',
            'rejected': 'rejected',
        }
        return self.safe_string(statuses, status, status)

    def parse_transaction(self, transaction, currency=None):
        #
        #     {
        #         requestId: "wuzd1Ojsqtz4bCA3UXwtUnnJDmU8PiyB",
        #         time: 1591606166000,
        #         asset: "USDT",
        #         transactionType: "deposit",
        #         amount: "25",
        #         commission: "0",
        #         networkTransactionId: "0xbc4eabdce92f14dbcc01d799a5f8ca1f02f4a3a804b6350ea202be4d3c738fce",
        #         status: "pending",
        #         numConfirmed: 8,
        #         numConfirmations: 20,
        #         destAddress: {
        #             address: "0xe7c70b4e73b6b450ee46c3b5c0f5fb127ca55722",
        #             destTag: "..."  # for currencies that have it
        #         }
        #     }
        #
        id = self.safe_string(transaction, 'requestId')
        amount = self.safe_number(transaction, 'amount')
        destAddress = self.safe_value(transaction, 'destAddress', {})
        address = self.safe_string(destAddress, 'address')
        tag = self.safe_string(destAddress, 'destTag')
        txid = self.safe_string(transaction, 'networkTransactionId')
        type = self.safe_string(transaction, 'transactionType')
        timestamp = self.safe_integer(transaction, 'time')
        currencyId = self.safe_string(transaction, 'asset')
        code = self.safe_currency_code(currencyId, currency)
        status = self.parse_transaction_status(self.safe_string(transaction, 'status'))
        feeCost = self.safe_number(transaction, 'commission')
        return {
            'info': transaction,
            'id': id,
            'currency': code,
            'amount': amount,
            'address': address,
            'addressTo': address,
            'addressFrom': None,
            'tag': tag,
            'tagTo': tag,
            'tagFrom': None,
            'status': status,
            'type': type,
            'updated': None,
            'txid': txid,
            'timestamp': timestamp,
            'datetime': self.iso8601(timestamp),
            'fee': {
                'currency': code,
                'cost': feeCost,
            },
        }

    def sign(self, path, api='public', method='GET', params={}, headers=None, body=None):
        url = ''
        query = params
        accountCategory = (api == 'accountCategory')
        if accountCategory or (api == 'accountGroup'):
            url += self.implode_params('/{account-group}', params)
            query = self.omit(params, 'account-group')
        request = self.implode_params(path, query)
        url += '/api/pro/' + self.version
        if accountCategory:
            url += self.implode_params('/{account-category}', query)
            query = self.omit(query, 'account-category')
        url += '/' + request
        query = self.omit(query, self.extract_params(path))
        if api == 'public':
            if query:
                url += '?' + self.urlencode(query)
        else:
            self.check_required_credentials()
            timestamp = str(self.milliseconds())
            payload = timestamp + '+' + request
            hmac = self.hmac(self.encode(payload), self.encode(self.secret), hashlib.sha256, 'base64')
            headers = {
                'x-auth-key': self.apiKey,
                'x-auth-timestamp': timestamp,
                'x-auth-signature': hmac,
            }
            if method == 'GET':
                if query:
                    url += '?' + self.urlencode(query)
            else:
                headers['Content-Type'] = 'application/json'
                body = self.json(query)
        url = self.urls['api'] + url
        return {'url': url, 'method': method, 'body': body, 'headers': headers}

    def handle_errors(self, httpCode, reason, url, method, headers, body, response, requestHeaders, requestBody):
        if response is None:
            return  # fallback to default error handler
        #
        #     {'code': 6010, 'message': 'Not enough balance.'}
        #     {'code': 60060, 'message': 'The order is already filled or canceled.'}
        #     {"code":2100,"message":"ApiKeyFailure"}
        #     {"code":300001,"message":"Price is too low from market price.","reason":"INVALID_PRICE","accountId":"cshrHKLZCjlZ2ejqkmvIHHtPmLYqdnda","ac":"CASH","action":"place-order","status":"Err","info":{"symbol":"BTC/USDT"}}
        #
        code = self.safe_string(response, 'code')
        message = self.safe_string(response, 'message')
        error = (code is not None) and (code != '0')
        if error or (message is not None):
            feedback = self.id + ' ' + body
            self.throw_exactly_matched_exception(self.exceptions['exact'], code, feedback)
            self.throw_exactly_matched_exception(self.exceptions['exact'], message, feedback)
            self.throw_broadly_matched_exception(self.exceptions['broad'], message, feedback)
            raise ExchangeError(feedback)  # unknown message
