text: 'use strict';
  
  //  ---------------------------------------------------------------------------
  
  const Exchange = require ('./base/Exchange');
  const { ExchangeError, AccountSuspended, ArgumentsRequired, AuthenticationError, DDoSProtection, ExchangeNotAvailable, InvalidOrder, OrderNotFound, PermissionDenied, InsufficientFunds, BadSymbol, RateLimitExceeded, BadRequest } = require ('./base/errors');
  const Precise = require ('./base/Precise');
  
  //  ---------------------------------------------------------------------------
  
  module.exports = class bibox extends Exchange {
      describe () {
          return this.deepExtend (super.describe (), {
              'id': 'bibox',
              'name': 'Bibox',
              'countries': [ 'CN', 'US', 'KR' ],
              'version': 'v1',
              'hostname': 'bibox.com',
              'has': {
                  'CORS': undefined,
                  'spot': true,
                  'margin': undefined, // has but unimplemented
                  'swap': undefined, // has but unimplemented
                  'future': undefined,
                  'option': undefined,
                  'cancelOrder': true,
                  'createMarketOrder': undefined, // or they will return https://github.com/ccxt/ccxt/issues/2338
                  'createOrder': true,
                  'fetchBalance': true,
                  'fetchBorrowRate': false,
                  'fetchBorrowRates': false,
                  'fetchClosedOrders': true,
                  'fetchCurrencies': true,
                  'fetchDepositAddress': true,
                  'fetchDeposits': true,
                  'fetchFundingFees': true,
                  'fetchMarkets': true,
                  'fetchMyTrades': true,
                  'fetchOHLCV': true,
                  'fetchOpenOrders': true,
                  'fetchOrder': true,
                  'fetchOrderBook': true,
                  'fetchTicker': true,
                  'fetchTickers': true,
                  'fetchTrades': true,
                  'fetchWithdrawals': true,
                  'withdraw': true,
              },
              'timeframes': {
                  '1m': '1min',
                  '5m': '5min',
                  '15m': '15min',
                  '30m': '30min',
                  '1h': '1hour',
                  '2h': '2hour',
                  '4h': '4hour',
                  '6h': '6hour',
                  '12h': '12hour',
                  '1d': 'day',
                  '1w': 'week',
              },
              'urls': {
                  'logo': 'https://user-images.githubusercontent.com/51840849/77257418-3262b000-6c85-11ea-8fb8-20bdf20b3592.jpg',
                  'api': 'https://api.{hostname}',
                  'www': 'https://www.bibox365.com',
                  'doc': [
                      'https://biboxcom.github.io/en/',
                  ],
                  'fees': 'https://bibox.zendesk.com/hc/en-us/articles/360002336133',
                  'referral': 'https://w2.bibox365.com/login/register?invite_code=05Kj3I',
              },
              'api': {
                  'public': {
                      'post': [
                          // TODO: rework for full endpoint/cmd paths here
                          'mdata',
                      ],
                      'get': [
                          'cquery',
                          'mdata',
                          'cdata',
                          'orderpending',
                      ],
                  },
                  'private': {
                      'post': [
                          'cquery',
                          'ctrade',
                          'user',
                          'orderpending',
                          'transfer',
                      ],
                  },
                  'v2private': {
                      'post': [
                          'assets/transfer/spot',
                      ],
                  },
              },
              'fees': {
                  'trading': {
                      'tierBased': false,
                      'percentage': true,
                      'taker': this.parseNumber ('0.001'),
                      'maker': this.parseNumber ('0.0008'),
                  },
                  'funding': {
                      'tierBased': false,
                      'percentage': false,
                      'withdraw': {},
                      'deposit': {},
                  },
              },
              'exceptions': {
                  '2011': AccountSuspended, // Account is locked
                  '2015': AuthenticationError, // Google authenticator is wrong
                  '2021': InsufficientFunds, // Insufficient balance available for withdrawal
                  '2027': InsufficientFunds, // Insufficient balance available (for trade)
                  '2033': OrderNotFound, // operation failed! Orders have been completed or revoked
                  '2065': InvalidOrder, // Precatory price is exorbitant, please reset
                  '2066': InvalidOrder, // Precatory price is low, please reset
                  '2067': InvalidOrder, // Does not support market orders
                  '2068': InvalidOrder, // The number of orders can not be less than
                  '2078': InvalidOrder, // unvalid order price
                  '2085': InvalidOrder, // Order quantity is too small
                  '2091': RateLimitExceeded, // request is too frequency, please try again later
                  '2092': InvalidOrder, // Minimum amount not met
                  '2131': InvalidOrder, // The order quantity cannot be greater than
                  '3000': BadRequest, // Requested parameter incorrect
                  '3002': BadRequest, // Parameter cannot be null
                  '3012': AuthenticationError, // invalid apiKey
                  '3016': BadSymbol, // Trading pair error
                  '3024': PermissionDenied, // wrong apikey permissions
                  '3025': AuthenticationError, // signature failed
                  '4000': ExchangeNotAvailable, // current network is unstable
                  '4003': DDoSProtection, // server busy please try again later
              },
              'commonCurrencies': {
                  'APENFT(NFT)': 'NFT',
                  'BOX': 'DefiBox',
                  'BPT': 'BlockPool Token',
                  'GTC': 'Game.com',
                  'KEY': 'Bihu',
                  'MTC': 'MTC Mesh Network', // conflict with MTC Docademic doc.com Token https://github.com/ccxt/ccxt/issues/6081 https://github.com/ccxt/ccxt/issues/3025
                  'NFT': 'NFT Protocol',
                  'PAI': 'PCHAIN',
                  'REVO': 'Revo Network',
                  'STAR': 'Starbase',
                  'TERN': 'Ternio-ERC20',
              },
          });
      }
  
      async fetchMarkets (params = {}) {
          const request = {
              'cmd': 'pairList',
          };
          const response = await this.publicGetMdata (this.extend (request, params));
          //
          //     {
          //         "result": [
          //             {
          //                 "id":1,
          //                 "pair":"BIX_BTC",
          //                 "pair_type":0,
          //                 "area_id":7,
          //                 "is_hide":0,
          //                 "decimal":8,
          //                 "amount_scale":4
          //             }
          //         ],
          //         "cmd":"pairList",
          //         "ver":"1.1"
          //     }
          //
          const markets = this.safeValue (response, 'result');
          const request2 = {
              'cmd': 'tradeLimit',
          };
          const response2 = await this.publicGetOrderpending (this.extend (request2, params));
          //
          //    {
          //         result: {
          //             min_trade_price: { default: '0.00000001', USDT: '0.0001', DAI: '0.0001' },
          //             min_trade_amount: { default: '0.0001' },
          //             min_trade_money: {
          //                 USDT: '1',
          //                 USDC: '1',
          //                 DAI: '1',
          //                 GUSD: '1',
          //                 BIX: '3',
          //                 BTC: '0.0002',
          //                 ETH: '0.005'
          //             }
          //         },
          //         cmd: 'tradeLimit'
          //     }
          //
          const result2 = this.safeValue (response2, 'result', {});
          const minCosts = this.safeValue (result2, 'min_trade_money', {});
          const result = [];
          for (let i = 0; i < markets.length; i++) {
              const market = markets[i];
              const numericId = this.safeInteger (market, 'id');
              const id = this.safeString (market, 'pair');
              let baseId = undefined;
              let quoteId = undefined;
              if (id !== undefined) {
                  const parts = id.split ('_');
                  baseId = this.safeString (parts, 0);
                  quoteId = this.safeString (parts, 1);
              }
              const base = this.safeCurrencyCode (baseId);
              const quote = this.safeCurrencyCode (quoteId);
              const symbol = base + '/' + quote;
              const type = 'spot';
              const spot = true;
              const areaId = this.safeInteger (market, 'area_id');
              if (areaId === 16) {
                  // TODO: update to v3 api
                  continue;
              }
              result.push ({
                  'id': id,
                  'numericId': numericId,
                  'symbol': symbol,
                  'base': base,
                  'quote': quote,
                  'settle': undefined,
                  'baseId': baseId,
                  'quoteId': quoteId,
                  'settleId': undefined,
                  'type': type,
                  'spot': spot,
                  'margin': false,
                  'swap': false,
                  'future': false,
                  'option': false,
                  'active': undefined,
                  'contract': false,
                  'linear': undefined,
                  'inverse': undefined,
                  'contractSize': undefined,
                  'expiry': undefined,
                  'expiryDatetime': undefined,
                  'strike': undefined,
                  'optionType': undefined,
                  'precision': {
                      'amount': this.safeInteger (market, 'amount_scale'),
                      'price': this.safeInteger (market, 'decimal'),
                  },
                  'limits': {
                      'leverage': {
                          'min': undefined,
                          'max': undefined,
                      },
                      'amount': {
                          'min': undefined,
                          'max': undefined,
                      },
                      'price': {
                          'min': undefined,
                          'max': undefined,
                      },
                      'cost': {
                          'min': this.safeNumber (minCosts, quoteId),
                          'max': undefined,
                      },
                  },
                  'info': market,
              });
          }
          return result;
      }
  
      parseTicker (ticker, market = undefined) {
          // we don't set values that are not defined by the exchange
          const timestamp = this.safeInteger (ticker, 'timestamp');
          let symbol = undefined;
          if (market !== undefined) {
              symbol = market['symbol'];
          } else {
              const baseId = this.safeString (ticker, 'coin_symbol');
              const quoteId = this.safeString (ticker, 'currency_symbol');
              const base = this.safeCurrencyCode (baseId);
              const quote = this.safeCurrencyCode (quoteId);
              symbol = base + '/' + quote;
          }
          const last = this.safeString (ticker, 'last');
          const change = this.safeString (ticker, 'change');
          const baseVolume = this.safeString2 (ticker, 'vol', 'vol24H');
          let percentage = this.safeString (ticker, 'percent');
          if (percentage !== undefined) {
              percentage = percentage.replace ('%', '');
          }
          return this.safeTicker ({
              'symbol': symbol,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'high': this.safeString (ticker, 'high'),
              'low': this.safeString (ticker, 'low'),
              'bid': this.safeString (ticker, 'buy'),
              'bidVolume': this.safeString (ticker, 'buy_amount'),
              'ask': this.safeString (ticker, 'sell'),
              'askVolume': this.safeString (ticker, 'sell_amount'),
              'vwap': undefined,
              'open': undefined,
              'close': last,
              'last': last,
              'previousClose': undefined,
              'change': change,
              'percentage': percentage,
              'average': undefined,
              'baseVolume': baseVolume,
              'quoteVolume': this.safeString (ticker, 'amount'),
              'info': ticker,
          }, market, false);
      }
  
      async fetchTicker (symbol, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'cmd': 'ticker',
              'pair': market['id'],
          };
          const response = await this.publicGetMdata (this.extend (request, params));
          return this.parseTicker (response['result'], market);
      }
  
      async fetchTickers (symbols = undefined, params = {}) {
          const request = {
              'cmd': 'marketAll',
          };
          const response = await this.publicGetMdata (this.extend (request, params));
          const tickers = this.parseTickers (response['result'], symbols);
          const result = this.indexBy (tickers, 'symbol');
          return this.filterByArray (result, 'symbol', symbols);
      }
  
      parseTrade (trade, market = undefined) {
          const timestamp = this.safeInteger2 (trade, 'time', 'createdAt');
          let side = this.safeInteger2 (trade, 'side', 'order_side');
          side = (side === 1) ? 'buy' : 'sell';
          let symbol = undefined;
          if (market === undefined) {
              let marketId = this.safeString (trade, 'pair');
              if (marketId === undefined) {
                  const baseId = this.safeString (trade, 'coin_symbol');
                  const quoteId = this.safeString (trade, 'currency_symbol');
                  if ((baseId !== undefined) && (quoteId !== undefined)) {
                      marketId = baseId + '_' + quoteId;
                  }
              }
              if (marketId in this.markets_by_id) {
                  market = this.markets_by_id[marketId];
              }
          }
          if (market !== undefined) {
              symbol = market['symbol'];
          }
          let fee = undefined;
          const feeCostString = this.safeString (trade, 'fee');
          let feeCurrency = this.safeString (trade, 'fee_symbol');
          if (feeCurrency !== undefined) {
              if (feeCurrency in this.currencies_by_id) {
                  feeCurrency = this.currencies_by_id[feeCurrency]['code'];
              } else {
                  feeCurrency = this.safeCurrencyCode (feeCurrency);
              }
          }
          const feeRate = undefined; // todo: deduce from market if market is defined
          const priceString = this.safeString (trade, 'price');
          const amountString = this.safeString (trade, 'amount');
          if (feeCostString !== undefined) {
              fee = {
                  'cost': Precise.stringNeg (feeCostString),
                  'currency': feeCurrency,
                  'rate': feeRate,
              };
          }
          const id = this.safeString (trade, 'id');
          return this.safeTrade ({
              'info': trade,
              'id': id,
              'order': undefined, // Bibox does not have it (documented) yet
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'symbol': symbol,
              'type': 'limit',
              'takerOrMaker': undefined,
              'side': side,
              'price': priceString,
              'amount': amountString,
              'cost': undefined,
              'fee': fee,
          }, market);
      }
  
      async fetchTrades (symbol, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'cmd': 'deals',
              'pair': market['id'],
          };
          if (limit !== undefined) {
              request['size'] = limit; // default = 200
          }
          const response = await this.publicGetMdata (this.extend (request, params));
          return this.parseTrades (response['result'], market, since, limit);
      }
  
      async fetchOrderBook (symbol, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'cmd': 'depth',
              'pair': market['id'],
          };
          if (limit !== undefined) {
              request['size'] = limit; // default = 200
          }
          const response = await this.publicGetMdata (this.extend (request, params));
          return this.parseOrderBook (response['result'], symbol, this.safeNumber (response['result'], 'update_time'), 'bids', 'asks', 'price', 'volume');
      }
  
      parseOHLCV (ohlcv, market = undefined) {
          //
          //     {
          //         "time":1591448220000,
          //         "open":"0.02507029",
          //         "high":"0.02507029",
          //         "low":"0.02506349",
          //         "close":"0.02506349",
          //         "vol":"5.92000000"
          //     }
          //
          return [
              this.safeInteger (ohlcv, 'time'),
              this.safeNumber (ohlcv, 'open'),
              this.safeNumber (ohlcv, 'high'),
              this.safeNumber (ohlcv, 'low'),
              this.safeNumber (ohlcv, 'close'),
              this.safeNumber (ohlcv, 'vol'),
          ];
      }
  
      async fetchOHLCV (symbol, timeframe = '1m', since = undefined, limit = 1000, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'cmd': 'kline',
              'pair': market['id'],
              'period': this.timeframes[timeframe],
              'size': limit,
          };
          const response = await this.publicGetMdata (this.extend (request, params));
          //
          //     {
          //         "result":[
          //             {"time":1591448220000,"open":"0.02507029","high":"0.02507029","low":"0.02506349","close":"0.02506349","vol":"5.92000000"},
          //             {"time":1591448280000,"open":"0.02506449","high":"0.02506975","low":"0.02506108","close":"0.02506843","vol":"5.72000000"},
          //             {"time":1591448340000,"open":"0.02506698","high":"0.02506698","low":"0.02506452","close":"0.02506519","vol":"4.86000000"},
          //         ],
          //         "cmd":"kline",
          //         "ver":"1.1"
          //     }
          //
          const result = this.safeValue (response, 'result', []);
          return this.parseOHLCVs (result, market, timeframe, since, limit);
      }
  
      async fetchCurrencies (params = {}) {
          if (this.checkRequiredCredentials (false)) {
              return await this.fetchCurrenciesPrivate (params);
          } else {
              return await this.fetchCurrenciesPublic (params);
          }
      }
  
      async fetchCurrenciesPublic (params = {}) {
          const request = {
              'cmd': 'currencies',
          };
          const response = await this.publicGetCdata (this.extend (request, params));
          //
          // publicGetCdata
          //
          //     {
          //         "result":[
          //             {
          //                 "symbol":"BTC",
          //                 "name":"BTC",
          //                 "valid_decimals":8,
          //                 "original_decimals":8,
          //                 "is_erc20":0,
          //                 "enable_withdraw":1,
          //                 "enable_deposit":1,
          //                 "withdraw_min":0.005,
          //                 "describe_summary":"[{\"lang\":\"zh-cn\",\"text\":\"Bitcoin 比特币的概念最初由中本聪在2009年提出，是点对点的基于 SHA-256 算法的一种P2P形式的数字货币，点对点的传输意味着一个去中心化的支付系统。\"},{\"lang\":\"en-ww\",\"text\":\"Bitcoin is a digital asset and a payment system invented by Satoshi Nakamoto who published a related paper in 2008 and released it as open-source software in 2009. The system featured as peer-to-peer; users can transact directly without an intermediary.\"}]"
          //             }
          //         ],
          //         "cmd":"currencies"
          //     }
          //
          const currencies = this.safeValue (response, 'result');
          const result = {};
          for (let i = 0; i < currencies.length; i++) {
              const currency = currencies[i];
              const id = this.safeString (currency, 'symbol');
              const name = this.safeString (currency, 'name'); // contains hieroglyphs causing python ASCII bug
              const code = this.safeCurrencyCode (id);
              const precision = this.safeInteger (currency, 'valid_decimals');
              const deposit = this.safeValue (currency, 'enable_deposit');
              const withdraw = this.safeValue (currency, 'enable_withdraw');
              const active = (deposit && withdraw);
              result[code] = {
                  'id': id,
                  'code': code,
                  'info': currency,
                  'name': name,
                  'active': active,
                  'deposit': deposit,
                  'withdraw': withdraw,
                  'fee': undefined,
                  'precision': precision,
                  'limits': {
                      'amount': {
                          'min': Math.pow (10, -precision),
                          'max': undefined,
                      },
                      'withdraw': {
                          'min': this.safeNumber (currency, 'withdraw_min'),
                          'max': undefined,
                      },
                  },
              };
          }
          return result;
      }
  
      async fetchCurrenciesPrivate (params = {}) {
          if (!this.checkRequiredCredentials (false)) {
              throw new AuthenticationError (this.id + " fetchCurrencies is an authenticated endpoint, therefore it requires 'apiKey' and 'secret' credentials. If you don't need currency details, set exchange.has['fetchCurrencies'] = false before calling its methods.");
          }
          const request = {
              'cmd': 'transfer/coinList',
              'body': {},
          };
          const response = await this.privatePostTransfer (this.extend (request, params));
          //
          //     {
          //         "result":[
          //             {
          //                 "result":[
          //                     {
          //                         "totalBalance":"14.60987476",
          //                         "balance":"14.60987476",
          //                         "freeze":"0.00000000",
          //                         "id":60,
          //                         "symbol":"USDT",
          //                         "icon_url":"/appimg/USDT_icon.png",
          //                         "describe_url":"[{\"lang\":\"zh-cn\",\"link\":\"https://bibox.zendesk.com/hc/zh-cn/articles/115004798234\"},{\"lang\":\"en-ww\",\"link\":\"https://bibox.zendesk.com/hc/en-us/articles/115004798234\"}]",
          //                         "name":"USDT",
          //                         "enable_withdraw":1,
          //                         "enable_deposit":1,
          //                         "enable_transfer":1,
          //                         "confirm_count":2,
          //                         "is_erc20":1,
          //                         "forbid_info":null,
          //                         "describe_summary":"[{\"lang\":\"zh-cn\",\"text\":\"USDT 是 Tether 公司推出的基于稳定价值货币美元（USD）的代币 Tether USD（简称USDT），1USDT=1美元，用户可以随时使用 USDT 与 USD 进行1:1的兑换。\"},{\"lang\":\"en-ww\",\"text\":\"USDT is a cryptocurrency asset issued on the Bitcoin blockchain via the Omni Layer Protocol. Each USDT unit is backed by a U.S Dollar held in the reserves of the Tether Limited and can be redeemed through the Tether Platform.\"}]",
          //                         "total_amount":4776930644,
          //                         "supply_amount":4642367414,
          //                         "price":"--",
          //                         "contract_father":"OMNI",
          //                         "supply_time":"--",
          //                         "comment":null,
          //                         "chain_type":"OMNI",
          //                         "general_name":"USDT",
          //                         "contract":"31",
          //                         "original_decimals":8,
          //                         "deposit_type":0,
          //                         "hasCobo":0,
          //                         "BTCValue":"0.00027116",
          //                         "CNYValue":"90.36087919",
          //                         "USDValue":"14.61090236",
          //                         "children":[
          //                             {"type":"ERC20","symbol":"eUSDT","enable_deposit":1,"enable_withdraw":1,"confirm_count":13},
          //                             {"type":"TRC20","symbol":"tUSDT","enable_deposit":1,"enable_withdraw":1,"confirm_count":20},
          //                             {"type":"OMNI","symbol":"USDT","enable_deposit":1,"enable_withdraw":1,"confirm_count":2},
          //                             {"type":"HECO","symbol":"hUSDT","enable_deposit":1,"enable_withdraw":1,"confirm_count":12},
          //                             {"type":"BSC(BEP20)","symbol":"bUSDT","enable_deposit":1,"enable_withdraw":1,"confirm_count":5},
          //                             {"type":"HPB","symbol":"pUSDT","enable_deposit":1,"enable_withdraw":1,"confirm_count":20}
          //                         ]
          //                     }
          //                 ],
          //                 "cmd":"transfer/coinList"
          //             }
          //         ]
          //     }
          //
          const outerResults = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResults, 0, {});
          const currencies = this.safeValue (firstResult, 'result');
          const result = {};
          for (let i = 0; i < currencies.length; i++) {
              const currency = currencies[i];
              const id = this.safeString (currency, 'symbol');
              const name = currency['name']; // contains hieroglyphs causing python ASCII bug
              const code = this.safeCurrencyCode (id);
              const precision = 8;
              const deposit = this.safeValue (currency, 'enable_deposit');
              const withdraw = this.safeValue (currency, 'enable_withdraw');
              const active = (deposit && withdraw);
              result[code] = {
                  'id': id,
                  'code': code,
                  'info': currency,
                  'name': name,
                  'active': active,
                  'fee': undefined,
                  'precision': precision,
                  'limits': {
                      'amount': {
                          'min': Math.pow (10, -precision),
                          'max': Math.pow (10, precision),
                      },
                      'withdraw': {
                          'min': undefined,
                          'max': Math.pow (10, precision),
                      },
                  },
              };
          }
          return result;
      }
  
      parseBalance (response) {
          const outerResult = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResult, 0, {});
          const innerResult = this.safeValue (firstResult, 'result');
          const result = { 'info': response };
          const assetsList = this.safeValue (innerResult, 'assets_list', []);
          for (let i = 0; i < assetsList.length; i++) {
              const balance = assetsList[i];
              const currencyId = this.safeString (balance, 'coin_symbol');
              const code = this.safeCurrencyCode (currencyId);
              const account = this.account ();
              account['free'] = this.safeString (balance, 'balance');
              account['used'] = this.safeString (balance, 'freeze');
              result[code] = account;
          }
          return this.safeBalance (result);
      }
  
      async fetchBalance (params = {}) {
          await this.loadMarkets ();
          const type = this.safeString (params, 'type', 'assets');
          params = this.omit (params, 'type');
          const request = {
              'cmd': 'transfer/' + type, // assets, mainAssets
              'body': this.extend ({
                  'select': 1, // return full info
              }, params),
          };
          const response = await this.privatePostTransfer (request);
          //
          //     {
          //         "result":[
          //             {
          //                 "result":{
          //                     "total_btc":"0.00000298",
          //                     "total_cny":"0.99",
          //                     "total_usd":"0.16",
          //                     "assets_list":[
          //                         {"coin_symbol":"BTC","BTCValue":"0.00000252","CNYValue":"0.84","USDValue":"0.14","balance":"0.00000252","freeze":"0.00000000"},
          //                         {"coin_symbol":"LTC","BTCValue":"0.00000023","CNYValue":"0.07","USDValue":"0.01","balance":"0.00006765","freeze":"0.00000000"},
          //                         {"coin_symbol":"USDT","BTCValue":"0.00000023","CNYValue":"0.08","USDValue":"0.01","balance":"0.01252100","freeze":"0.00000000"}
          //                     ]
          //                 },
          //                 "cmd":"transfer/assets"
          //             }
          //         ]
          //     }
          //
          return this.parseBalance (response);
      }
  
      async fetchDeposits (code = undefined, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          if (limit === undefined) {
              limit = 100;
          }
          const request = {
              'page': 1,
              'size': limit,
          };
          let currency = undefined;
          if (code !== undefined) {
              currency = this.currency (code);
              request['symbol'] = currency['id'];
          }
          const response = await this.privatePostTransfer ({
              'cmd': 'transfer/transferInList',
              'body': this.extend (request, params),
          });
          //
          //     {
          //         "result":[
          //             {
          //                 "result":{
          //                     "count":2,
          //                     "page":1,
          //                     "items":[
          //                         {
          //                             "coin_symbol":"ETH",                        // token
          //                             "to_address":"xxxxxxxxxxxxxxxxxxxxxxxxxx",  // address
          //                             "amount":"1.00000000",                      // amount
          //                             "confirmCount":"15",                        // the acknowledgment number
          //                             "createdAt":1540641511000,
          //                             "status":2                                 // status,  1-deposit is in process，2-deposit finished，3-deposit failed
          //                         },
          //                         {
          //                             "coin_symbol":"BIX",
          //                             "to_address":"xxxxxxxxxxxxxxxxxxxxxxxxxx",
          //                             "amount":"1.00000000",
          //                             "confirmCount":"15",
          //                             "createdAt":1540622460000,
          //                             "status":2
          //                         }
          //                     ]
          //                 },
          //                 "cmd":"transfer/transferInList"
          //             }
          //         ]
          //     }
          //
          const outerResults = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResults, 0, {});
          const innerResult = this.safeValue (firstResult, 'result', {});
          const deposits = this.safeValue (innerResult, 'items', []);
          for (let i = 0; i < deposits.length; i++) {
              deposits[i]['type'] = 'deposit';
          }
          return this.parseTransactions (deposits, currency, since, limit);
      }
  
      async fetchWithdrawals (code = undefined, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          if (limit === undefined) {
              limit = 100;
          }
          const request = {
              'page': 1,
              'size': limit,
          };
          let currency = undefined;
          if (code !== undefined) {
              currency = this.currency (code);
              request['symbol'] = currency['id'];
          }
          const response = await this.privatePostTransfer ({
              'cmd': 'transfer/transferOutList',
              'body': this.extend (request, params),
          });
          //
          //     {
          //         "result":[
          //             {
          //                 "result":{
          //                     "count":1,
          //                     "page":1,
          //                     "items":[
          //                         {
          //                             "id":612867,
          //                             "coin_symbol":"ETH",
          //                             "chain_type":"ETH",
          //                             "to_address":"0xd41de7a88ab5fc59edc6669f54873576be95bff1",
          //                             "tx_id":"0xc60950596227af3f27c3a1b5911ea1c79bae53bdce67274e48a0ce87a5ef2df8",
          //                             "addr_remark":"binance",
          //                             "amount":"2.34550946",
          //                             "fee":"0.00600000",
          //                             "createdAt":1561339330000,
          //                             "memo":"",
          //                             "status":3
          //                         }
          //                     ]
          //                 },
          //                 "cmd":"transfer/transferOutList"
          //             }
          //         ]
          //     }
          //
          const outerResults = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResults, 0, {});
          const innerResult = this.safeValue (firstResult, 'result', {});
          const withdrawals = this.safeValue (innerResult, 'items', []);
          for (let i = 0; i < withdrawals.length; i++) {
              withdrawals[i]['type'] = 'withdrawal';
          }
          return this.parseTransactions (withdrawals, currency, since, limit);
      }
  
      parseTransaction (transaction, currency = undefined) {
          //
          // fetchDeposits
          //
          //     {
          //         'id': 1023291,
          //         'coin_symbol': 'ETH',
          //         'to_address': '0x7263....',
          //         'amount': '0.49170000',
          //         'confirmCount': '16',
          //         'createdAt': 1553123867000,
          //         'status': 2
          //     }
          //
          // fetchWithdrawals
          //
          //     {
          //         'id': 521844,
          //         'coin_symbol': 'ETH',
          //         'to_address': '0xfd4e....',
          //         'addr_remark': '',
          //         'amount': '0.39452750',
          //         'fee': '0.00600000',
          //         'createdAt': 1553226906000,
          //         'memo': '',
          //         'status': 3
          //     }
          //
          const id = this.safeString (transaction, 'id');
          const address = this.safeString (transaction, 'to_address');
          const currencyId = this.safeString (transaction, 'coin_symbol');
          const code = this.safeCurrencyCode (currencyId, currency);
          const timestamp = this.safeString (transaction, 'createdAt');
          let tag = this.safeString (transaction, 'addr_remark');
          const type = this.safeString (transaction, 'type');
          const status = this.parseTransactionStatusByType (this.safeString (transaction, 'status'), type);
          const amount = this.safeNumber (transaction, 'amount');
          let feeCost = this.safeNumber (transaction, 'fee');
          if (type === 'deposit') {
              feeCost = 0;
              tag = undefined;
          }
          const fee = {
              'cost': feeCost,
              'currency': code,
          };
          return {
              'info': transaction,
              'id': id,
              'txid': undefined,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'network': undefined,
              'address': address,
              'addressTo': undefined,
              'addressFrom': undefined,
              'tag': tag,
              'tagTo': undefined,
              'tagFrom': undefined,
              'type': type,
              'amount': amount,
              'currency': code,
              'status': status,
              'updated': undefined,
              'fee': fee,
          };
      }
  
      parseTransactionStatusByType (status, type = undefined) {
          const statuses = {
              'deposit': {
                  '1': 'pending',
                  '2': 'ok',
              },
              'withdrawal': {
                  '0': 'pending',
                  '3': 'ok',
              },
          };
          return this.safeString (this.safeValue (statuses, type, {}), status, status);
      }
  
      async createOrder (symbol, type, side, amount, price = undefined, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const orderType = (type === 'limit') ? 2 : 1;
          const orderSide = (side === 'buy') ? 1 : 2;
          const request = {
              'cmd': 'orderpending/trade',
              'body': this.extend ({
                  'pair': market['id'],
                  'account_type': 0,
                  'order_type': orderType,
                  'order_side': orderSide,
                  'pay_bix': 0,
                  'amount': amount,
                  'price': price,
              }, params),
          };
          const response = await this.privatePostOrderpending (request);
          //
          //     {
          //         "result":[
          //             {
          //                 "result": "100055558128036", // order id
          //                 "index": 12345, // random index, specific one in a batch
          //                 "cmd":"orderpending/trade"
          //             }
          //         ]
          //     }
          //
          const outerResults = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResults, 0, {});
          const id = this.safeValue (firstResult, 'result');
          return {
              'info': response,
              'id': id,
          };
      }
  
      async cancelOrder (id, symbol = undefined, params = {}) {
          const request = {
              'cmd': 'orderpending/cancelTrade',
              'body': this.extend ({
                  'orders_id': id,
              }, params),
          };
          const response = await this.privatePostOrderpending (request);
          //
          //     {
          //         "result":[
          //             {
          //                 "result":"OK", // only indicates if the server received the cancelling request, and the cancelling result can be obtained from the order record
          //                 "index": 12345, // random index, specific one in a batch
          //                 "cmd":"orderpending/cancelTrade"
          //             }
          //         ]
          //     }
          //
          const outerResults = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResults, 0, {});
          return firstResult;
      }
  
      async fetchOrder (id, symbol = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {
              'cmd': 'orderpending/order',
              'body': this.extend ({
                  'id': id.toString (),
                  'account_type': 0, // 0 = spot account
              }, params),
          };
          const response = await this.privatePostOrderpending (request);
          //
          //     {
          //         "result":[
          //             {
          //                 "result":{
          //                     "id":"100055558128036",
          //                     "createdAt": 1512756997000,
          //                     "account_type":0,
          //                     "coin_symbol":"LTC",        // Trading Token
          //                     "currency_symbol":"BTC",    // Pricing Token
          //                     "order_side":2,             // Trading side 1-Buy, 2-Sell
          //                     "order_type":2,             // 2-limit order
          //                     "price":"0.00900000",       // order price
          //                     "amount":"1.00000000",      // order amount
          //                     "money":"0.00900000",       // currency amount (price * amount)
          //                     "deal_amount":"0.00000000", // deal amount
          //                     "deal_percent":"0.00%",     // deal percentage
          //                     "unexecuted":"0.00000000",  // unexecuted amount
          //                     "status":3                  // Status, -1-fail, 0,1-to be dealt, 2-dealt partly, 3-dealt totally, 4- cancelled partly, 5-cancelled totally, 6-to be cancelled
          //                 },
          //                 "cmd":"orderpending/order"
          //             }
          //         ]
          //     }
          //
          const outerResults = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResults, 0, {});
          const order = this.safeValue (firstResult, 'result');
          if (this.isEmpty (order)) {
              throw new OrderNotFound (this.id + ' order ' + id + ' not found');
          }
          return this.parseOrder (order);
      }
  
      parseOrder (order, market = undefined) {
          let symbol = undefined;
          if (market === undefined) {
              let marketId = undefined;
              const baseId = this.safeString (order, 'coin_symbol');
              const quoteId = this.safeString (order, 'currency_symbol');
              if ((baseId !== undefined) && (quoteId !== undefined)) {
                  marketId = baseId + '_' + quoteId;
              }
              if (marketId in this.markets_by_id) {
                  market = this.markets_by_id[marketId];
              }
          }
          if (market !== undefined) {
              symbol = market['symbol'];
          }
          const rawType = this.safeString (order, 'order_type');
          const type = (rawType === '1') ? 'market' : 'limit';
          const timestamp = this.safeInteger (order, 'createdAt');
          const price = this.safeString (order, 'price');
          const average = this.safeString (order, 'deal_price');
          const filled = this.safeString (order, 'deal_amount');
          const amount = this.safeString (order, 'amount');
          const cost = this.safeString2 (order, 'deal_money', 'money');
          const rawSide = this.safeString (order, 'order_side');
          const side = (rawSide === '1') ? 'buy' : 'sell';
          const status = this.parseOrderStatus (this.safeString (order, 'status'));
          const id = this.safeString (order, 'id');
          const feeCost = this.safeNumber (order, 'fee');
          let fee = undefined;
          if (feeCost !== undefined) {
              fee = {
                  'cost': feeCost,
                  'currency': undefined,
              };
          }
          return this.safeOrder ({
              'info': order,
              'id': id,
              'clientOrderId': undefined,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'lastTradeTimestamp': undefined,
              'symbol': symbol,
              'type': type,
              'timeInForce': undefined,
              'postOnly': undefined,
              'side': side,
              'price': price,
              'stopPrice': undefined,
              'amount': amount,
              'cost': cost,
              'average': average,
              'filled': filled,
              'remaining': undefined,
              'status': status,
              'fee': fee,
              'trades': undefined,
          }, market);
      }
  
      parseOrderStatus (status) {
          const statuses = {
              // original comments from bibox:
              '1': 'open', // pending
              '2': 'open', // part completed
              '3': 'closed', // completed
              '4': 'canceled', // part canceled
              '5': 'canceled', // canceled
              '6': 'canceled', // canceling
          };
          return this.safeString (statuses, status, status);
      }
  
      async fetchOpenOrders (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          let market = undefined;
          let pair = undefined;
          if (symbol !== undefined) {
              market = this.market (symbol);
              pair = market['id'];
          }
          const size = limit ? limit : 200;
          const request = {
              'cmd': 'orderpending/orderPendingList',
              'body': this.extend ({
                  'pair': pair,
                  'account_type': 0, // 0 - regular, 1 - margin
                  'page': 1,
                  'size': size,
              }, params),
          };
          const response = await this.privatePostOrderpending (request);
          //
          //     {
          //         "result":[
          //             {
          //                 "result":{
          //                     "count":1,
          //                     "page":1,
          //                     "items":[
          //                         {
          //                             "id":"100055558128036",
          //                             "createdAt": 1512756997000,
          //                             "account_type":0,
          //                             "coin_symbol":"LTC",        // Trading Token
          //                             "currency_symbol":"BTC",    // Pricing Token
          //                             "order_side":2,             // Trading side 1-Buy, 2-Sell
          //                             "order_type":2,             // 2-limit order
          //                             "price":"0.00900000",       // order price
          //                             "amount":"1.00000000",      // order amount
          //                             "money":"0.00900000",       // currency amount (price * amount)
          //                             "deal_amount":"0.00000000", // deal amount
          //                             "deal_percent":"0.00%",     // deal percentage
          //                             "unexecuted":"0.00000000",  // unexecuted amount
          //                             "status":1                  // Status,-1-fail, 0,1-to be dealt, 2-dealt partly, 3-dealt totally, 4- cancelled partly, 5-cancelled totally, 6-to be cancelled
          //                         }
          //                     ]
          //                 },
          //                 "cmd":"orderpending/orderPendingList"
          //             }
          //         ]
          //     }
          //
          const outerResults = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResults, 0, {});
          const innerResult = this.safeValue (firstResult, 'result', {});
          const orders = this.safeValue (innerResult, 'items', []);
          return this.parseOrders (orders, market, since, limit);
      }
  
      async fetchClosedOrders (symbol = undefined, since = undefined, limit = 200, params = {}) {
          if (symbol === undefined) {
              throw new ArgumentsRequired (this.id + ' fetchClosedOrders() requires a `symbol` argument');
          }
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'cmd': 'orderpending/pendingHistoryList',
              'body': this.extend ({
                  'pair': market['id'],
                  'account_type': 0, // 0 - regular, 1 - margin
                  'page': 1,
                  'size': limit,
              }, params),
          };
          const response = await this.privatePostOrderpending (request);
          //
          //     {
          //         "result":[
          //             {
          //                 "result":{
          //                     "count":1,
          //                     "page":1,
          //                     "items":[
          //                         {
          //                             "id":"100055558128036",
          //                             "createdAt": 1512756997000,
          //                             "account_type":0,
          //                             "coin_symbol":"LTC",        // Trading Token
          //                             "currency_symbol":"BTC",    // Pricing Token
          //                             "order_side":2,             // Trading side 1-Buy, 2-Sell
          //                             "order_type":2,             // 2-limit order
          //                             "price":"0.00900000",       // order price
          //                             "amount":"1.00000000",      // order amount
          //                             "money":"0.00900000",       // currency amount (price * amount)
          //                             "deal_amount":"0.00000000", // deal amount
          //                             "deal_percent":"0.00%",     // deal percentage
          //                             "unexecuted":"0.00000000",  // unexecuted amount
          //                             "status":3                  // Status,-1-fail, 0,1-to be dealt, 2-dealt partly, 3-dealt totally, 4- cancelled partly, 5-cancelled totally, 6-to be cancelled
          //                         }
          //                     ]
          //                 },
          //                 "cmd":"orderpending/pendingHistoryList"
          //             }
          //         ]
          //     }
          //
          const outerResults = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResults, 0, {});
          const innerResult = this.safeValue (firstResult, 'result', {});
          const orders = this.safeValue (innerResult, 'items', []);
          return this.parseOrders (orders, market, since, limit);
      }
  
      async fetchMyTrades (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          if (symbol === undefined) {
              throw new ArgumentsRequired (this.id + ' fetchMyTrades() requires a `symbol` argument');
          }
          await this.loadMarkets ();
          const market = this.market (symbol);
          const size = limit ? limit : 200;
          const request = {
              'cmd': 'orderpending/orderHistoryList',
              'body': this.extend ({
                  'pair': market['id'],
                  'account_type': 0, // 0 - regular, 1 - margin
                  'page': 1,
                  'size': size,
                  'coin_symbol': market['baseId'],
                  'currency_symbol': market['quoteId'],
              }, params),
          };
          const response = await this.privatePostOrderpending (request);
          //
          //     {
          //         "result":[
          //             {
          //                 "result":{
          //                     "count":1,
          //                     "page":1,
          //                     "items":[
          //                         {
          //                             "id":"100055558128033",
          //                             "createdAt": 1512756997000,
          //                             "account_type":0,
          //                             "coin_symbol":"LTC",
          //                             "currency_symbol":"BTC",
          //                             "order_side":2,
          //                             "order_type":2,
          //                             "price":"0.00886500",
          //                             "amount":"1.00000000",
          //                             "money":"0.00886500",
          //                             "fee":0
          //                         }
          //                     ]
          //                 },
          //                 "cmd":"orderpending/orderHistoryList"
          //             }
          //         ]
          //     }
          //
          const outerResults = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResults, 0, {});
          const innerResult = this.safeValue (firstResult, 'result', {});
          const trades = this.safeValue (innerResult, 'items', []);
          return this.parseTrades (trades, market, since, limit);
      }
  
      async fetchDepositAddress (code, params = {}) {
          await this.loadMarkets ();
          const currency = this.currency (code);
          const request = {
              'cmd': 'transfer/transferIn',
              'body': this.extend ({
                  'coin_symbol': currency['id'],
              }, params),
          };
          const response = await this.privatePostTransfer (request);
          //
          //     {
          //         "result":[
          //             {
          //                 "result":"3Jx6RZ9TNMsAoy9NUzBwZf68QBppDruSKW",
          //                 "cmd":"transfer/transferIn"
          //             }
          //         ]
          //     }
          //
          //     {
          //         "result":[
          //             {
          //                 "result":"{\"account\":\"PERSONALLY OMITTED\",\"memo\":\"PERSONALLY OMITTED\"}",
          //                 "cmd":"transfer/transferIn"
          //             }
          //         ]
          //     }
          //
          const outerResults = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResults, 0, {});
          const innerResult = this.safeValue (firstResult, 'result');
          let address = innerResult;
          let tag = undefined;
          if (this.isJsonEncodedObject (innerResult)) {
              const parsed = JSON.parse (innerResult);
              address = this.safeString (parsed, 'account');
              tag = this.safeString (parsed, 'memo');
          }
          return {
              'currency': code,
              'address': address,
              'tag': tag,
              'network': undefined,
              'info': response,
          };
      }
  
      async withdraw (code, amount, address, tag = undefined, params = {}) {
          [ tag, params ] = this.handleWithdrawTagAndParams (tag, params);
          this.checkAddress (address);
          await this.loadMarkets ();
          const currency = this.currency (code);
          if (this.password === undefined) {
              if (!('trade_pwd' in params)) {
                  throw new ExchangeError (this.id + ' withdraw() requires this.password set on the exchange instance or a trade_pwd parameter');
              }
          }
          if (!('totp_code' in params)) {
              throw new ExchangeError (this.id + ' withdraw() requires a totp_code parameter for 2FA authentication');
          }
          const request = {
              'trade_pwd': this.password,
              'coin_symbol': currency['id'],
              'amount': amount,
              'addr': address,
          };
          if (tag !== undefined) {
              request['address_remark'] = tag;
          }
          const response = await this.privatePostTransfer ({
              'cmd': 'transfer/transferOut',
              'body': this.extend (request, params),
          });
          //
          //     {
          //         "result":[
          //             {
          //                 "result": 228, // withdrawal id
          //                 "cmd":"transfer/transferOut"
          //             }
          //         ]
          //     }
          //
          const outerResults = this.safeValue (response, 'result');
          const firstResult = this.safeValue (outerResults, 0, {});
          const id = this.safeValue (firstResult, 'result');
          return {
              'info': response,
              'id': id,
          };
      }
  
      async fetchFundingFees (codes = undefined, params = {}) {
          // by default it will try load withdrawal fees of all currencies (with separate requests)
          // however if you define codes = [ 'ETH', 'BTC' ] in args it will only load those
          await this.loadMarkets ();
          const withdrawFees = {};
          const info = {};
          if (codes === undefined) {
              codes = Object.keys (this.currencies);
          }
          for (let i = 0; i < codes.length; i++) {
              const code = codes[i];
              const currency = this.currency (code);
              const request = {
                  'cmd': 'transfer/coinConfig',
                  'body': this.extend ({
                      'coin_symbol': currency['id'],
                  }, params),
              };
              const response = await this.privatePostTransfer (request);
              //     {
              //         "result":[
              //             {
              //                 "result":[
              //                     {
              //                         "coin_symbol":"ETH",
              //                         "is_active":1,
              //                         "original_decimals":18,
              //                         "enable_deposit":1,
              //                         "enable_withdraw":1,
              //                         "withdraw_fee":0.008,
              //                         "withdraw_min":0.05,
              //                         "deposit_avg_spent":173700,
              //                         "withdraw_avg_spent":322600
              //                     }
              //                 ],
              //                 "cmd":"transfer/coinConfig"
              //             }
              //         ]
              //     }
              //
              const outerResults = this.safeValue (response, 'result', []);
              const firstOuterResult = this.safeValue (outerResults, 0, {});
              const innerResults = this.safeValue (firstOuterResult, 'result', []);
              const firstInnerResult = this.safeValue (innerResults, 0, {});
              info[code] = firstInnerResult;
              withdrawFees[code] = this.safeNumber (firstInnerResult, 'withdraw_fee');
          }
          return {
              'info': info,
              'withdraw': withdrawFees,
              'deposit': {},
          };
      }
  
      sign (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
          let url = this.implodeHostname (this.urls['api']) + '/' + this.version + '/' + path;
          const cmds = this.json ([ params ]);
          if (api === 'public') {
              if (method !== 'GET') {
                  body = { 'cmds': cmds };
              } else if (Object.keys (params).length) {
                  url += '?' + this.urlencode (params);
              }
          } else if (api === 'v2private') {
              this.checkRequiredCredentials ();
              url = this.implodeHostname (this.urls['api']) + '/v2/' + path;
              const json_params = this.json (params);
              body = {
                  'body': json_params,
                  'apikey': this.apiKey,
                  'sign': this.hmac (this.encode (json_params), this.encode (this.secret), 'md5'),
              };
          } else {
              this.checkRequiredCredentials ();
              body = {
                  'cmds': cmds,
                  'apikey': this.apiKey,
                  'sign': this.hmac (this.encode (cmds), this.encode (this.secret), 'md5'),
              };
          }
          if (body !== undefined) {
              body = this.json (body, { 'convertArraysToObjects': true });
          }
          headers = { 'Content-Type': 'application/json' };
          return { 'url': url, 'method': method, 'body': body, 'headers': headers };
      }
  
      handleErrors (code, reason, url, method, headers, body, response, requestHeaders, requestBody) {
          if (response === undefined) {
              return;
          }
          if ('error' in response) {
              if ('code' in response['error']) {
                  const code = this.safeString (response['error'], 'code');
                  const feedback = this.id + ' ' + body;
                  this.throwExactlyMatchedException (this.exceptions, code, feedback);
                  throw new ExchangeError (feedback);
              }
              throw new ExchangeError (this.id + ' ' + body);
          }
          if (!('result' in response)) {
              throw new ExchangeError (this.id + ' ' + body);
          }
      }
  };
  