text: 'use strict';
  
  //  ---------------------------------------------------------------------------
  
  const Exchange = require ('./base/Exchange');
  const { BadSymbol, ExchangeError, AuthenticationError } = require ('./base/errors');
  const { TICK_SIZE } = require ('./base/functions/number');
  
  //  ---------------------------------------------------------------------------
  
  module.exports = class coincheck extends Exchange {
      describe () {
          return this.deepExtend (super.describe (), {
              'id': 'coincheck',
              'name': 'coincheck',
              'countries': [ 'JP', 'ID' ],
              'rateLimit': 1500,
              'has': {
                  'CORS': undefined,
                  'spot': true,
                  'margin': false,
                  'swap': false,
                  'future': false,
                  'option': false,
                  'addMargin': false,
                  'cancelOrder': true,
                  'createOrder': true,
                  'createReduceOnlyOrder': false,
                  'fetchBalance': true,
                  'fetchBorrowRate': false,
                  'fetchBorrowRateHistories': false,
                  'fetchBorrowRateHistory': false,
                  'fetchBorrowRates': false,
                  'fetchBorrowRatesPerSymbol': false,
                  'fetchDeposits': true,
                  'fetchFundingHistory': false,
                  'fetchFundingRate': false,
                  'fetchFundingRateHistory': false,
                  'fetchFundingRates': false,
                  'fetchIndexOHLCV': false,
                  'fetchLeverage': false,
                  'fetchMarkOHLCV': false,
                  'fetchMyTrades': true,
                  'fetchOpenInterestHistory': false,
                  'fetchOpenOrders': true,
                  'fetchOrderBook': true,
                  'fetchPosition': false,
                  'fetchPositions': false,
                  'fetchPositionsRisk': false,
                  'fetchPremiumIndexOHLCV': false,
                  'fetchTicker': true,
                  'fetchTrades': true,
                  'fetchTradingFee': false,
                  'fetchTradingFees': true,
                  'fetchWithdrawals': true,
                  'reduceMargin': false,
                  'setLeverage': false,
                  'setMarginMode': false,
                  'setPositionMode': false,
              },
              'urls': {
                  'logo': 'https://user-images.githubusercontent.com/51840849/87182088-1d6d6380-c2ec-11ea-9c64-8ab9f9b289f5.jpg',
                  'api': 'https://coincheck.com/api',
                  'www': 'https://coincheck.com',
                  'doc': 'https://coincheck.com/documents/exchange/api',
                  'fees': [
                      'https://coincheck.com/exchange/fee',
                      'https://coincheck.com/info/fee',
                  ],
              },
              'api': {
                  'public': {
                      'get': [
                          'exchange/orders/rate',
                          'order_books',
                          'rate/{pair}',
                          'ticker',
                          'trades',
                      ],
                  },
                  'private': {
                      'get': [
                          'accounts',
                          'accounts/balance',
                          'accounts/leverage_balance',
                          'bank_accounts',
                          'deposit_money',
                          'exchange/orders/opens',
                          'exchange/orders/transactions',
                          'exchange/orders/transactions_pagination',
                          'exchange/leverage/positions',
                          'lending/borrows/matches',
                          'send_money',
                          'withdraws',
                      ],
                      'post': [
                          'bank_accounts',
                          'deposit_money/{id}/fast',
                          'exchange/orders',
                          'exchange/transfers/to_leverage',
                          'exchange/transfers/from_leverage',
                          'lending/borrows',
                          'lending/borrows/{id}/repay',
                          'send_money',
                          'withdraws',
                      ],
                      'delete': [
                          'bank_accounts/{id}',
                          'exchange/orders/{id}',
                          'withdraws/{id}',
                      ],
                  },
              },
              'markets': {
                  'BTC/JPY': { 'id': 'btc_jpy', 'symbol': 'BTC/JPY', 'base': 'BTC', 'quote': 'JPY', 'baseId': 'btc', 'quoteId': 'jpy', 'type': 'spot', 'spot': true }, // the only real pair
                  // 'ETH/JPY': { 'id': 'eth_jpy', 'symbol': 'ETH/JPY', 'base': 'ETH', 'quote': 'JPY', 'baseId': 'eth', 'quoteId': 'jpy' },
                  'ETC/JPY': { 'id': 'etc_jpy', 'symbol': 'ETC/JPY', 'base': 'ETC', 'quote': 'JPY', 'baseId': 'etc', 'quoteId': 'jpy', 'type': 'spot', 'spot': true },
                  // 'DAO/JPY': { 'id': 'dao_jpy', 'symbol': 'DAO/JPY', 'base': 'DAO', 'quote': 'JPY', 'baseId': 'dao', 'quoteId': 'jpy' },
                  // 'LSK/JPY': { 'id': 'lsk_jpy', 'symbol': 'LSK/JPY', 'base': 'LSK', 'quote': 'JPY', 'baseId': 'lsk', 'quoteId': 'jpy' },
                  'FCT/JPY': { 'id': 'fct_jpy', 'symbol': 'FCT/JPY', 'base': 'FCT', 'quote': 'JPY', 'baseId': 'fct', 'quoteId': 'jpy', 'type': 'spot', 'spot': true },
                  'MONA/JPY': { 'id': 'mona_jpy', 'symbol': 'MONA/JPY', 'base': 'MONA', 'quote': 'JPY', 'baseId': 'mona', 'quoteId': 'jpy', 'type': 'spot', 'spot': true },
                  // 'XMR/JPY': { 'id': 'xmr_jpy', 'symbol': 'XMR/JPY', 'base': 'XMR', 'quote': 'JPY', 'baseId': 'xmr', 'quoteId': 'jpy' },
                  // 'REP/JPY': { 'id': 'rep_jpy', 'symbol': 'REP/JPY', 'base': 'REP', 'quote': 'JPY', 'baseId': 'rep', 'quoteId': 'jpy' },
                  // 'XRP/JPY': { 'id': 'xrp_jpy', 'symbol': 'XRP/JPY', 'base': 'XRP', 'quote': 'JPY', 'baseId': 'xrp', 'quoteId': 'jpy' },
                  // 'ZEC/JPY': { 'id': 'zec_jpy', 'symbol': 'ZEC/JPY', 'base': 'ZEC', 'quote': 'JPY', 'baseId': 'zec', 'quoteId': 'jpy' },
                  // 'XEM/JPY': { 'id': 'xem_jpy', 'symbol': 'XEM/JPY', 'base': 'XEM', 'quote': 'JPY', 'baseId': 'xem', 'quoteId': 'jpy' },
                  // 'LTC/JPY': { 'id': 'ltc_jpy', 'symbol': 'LTC/JPY', 'base': 'LTC', 'quote': 'JPY', 'baseId': 'ltc', 'quoteId': 'jpy' },
                  // 'DASH/JPY': { 'id': 'dash_jpy', 'symbol': 'DASH/JPY', 'base': 'DASH', 'quote': 'JPY', 'baseId': 'dash', 'quoteId': 'jpy' },
                  // 'ETH/BTC': { 'id': 'eth_btc', 'symbol': 'ETH/BTC', 'base': 'ETH', 'quote': 'BTC', 'baseId': 'eth', 'quoteId': 'btc' },
                  'ETC/BTC': { 'id': 'etc_btc', 'symbol': 'ETC/BTC', 'base': 'ETC', 'quote': 'BTC', 'baseId': 'etc', 'quoteId': 'btc', 'type': 'spot', 'spot': true },
                  // 'LSK/BTC': { 'id': 'lsk_btc', 'symbol': 'LSK/BTC', 'base': 'LSK', 'quote': 'BTC', 'baseId': 'lsk', 'quoteId': 'btc' },
                  // 'FCT/BTC': { 'id': 'fct_btc', 'symbol': 'FCT/BTC', 'base': 'FCT', 'quote': 'BTC', 'baseId': 'fct', 'quoteId': 'btc' },
                  // 'XMR/BTC': { 'id': 'xmr_btc', 'symbol': 'XMR/BTC', 'base': 'XMR', 'quote': 'BTC', 'baseId': 'xmr', 'quoteId': 'btc' },
                  // 'REP/BTC': { 'id': 'rep_btc', 'symbol': 'REP/BTC', 'base': 'REP', 'quote': 'BTC', 'baseId': 'rep', 'quoteId': 'btc' },
                  // 'XRP/BTC': { 'id': 'xrp_btc', 'symbol': 'XRP/BTC', 'base': 'XRP', 'quote': 'BTC', 'baseId': 'xrp', 'quoteId': 'btc' },
                  // 'ZEC/BTC': { 'id': 'zec_btc', 'symbol': 'ZEC/BTC', 'base': 'ZEC', 'quote': 'BTC', 'baseId': 'zec', 'quoteId': 'btc' },
                  // 'XEM/BTC': { 'id': 'xem_btc', 'symbol': 'XEM/BTC', 'base': 'XEM', 'quote': 'BTC', 'baseId': 'xem', 'quoteId': 'btc' },
                  // 'LTC/BTC': { 'id': 'ltc_btc', 'symbol': 'LTC/BTC', 'base': 'LTC', 'quote': 'BTC', 'baseId': 'ltc', 'quoteId': 'btc' },
                  // 'DASH/BTC': { 'id': 'dash_btc', 'symbol': 'DASH/BTC', 'base': 'DASH', 'quote': 'BTC', 'baseId': 'dash', 'quoteId': 'btc' },
              },
              'fees': {
                  'trading': {
                      'tierBased': false,
                      'percentage': true,
                      'maker': this.parseNumber ('0'),
                      'taker': this.parseNumber ('0'),
                  },
              },
              'precisionMode': TICK_SIZE,
              'exceptions': {
                  'exact': {
                      'disabled API Key': AuthenticationError, // {"success":false,"error":"disabled API Key"}'
                      'invalid authentication': AuthenticationError, // {"success":false,"error":"invalid authentication"}
                  },
                  'broad': {},
              },
          });
      }
  
      parseBalance (response) {
          const result = { 'info': response };
          const codes = Object.keys (this.currencies);
          for (let i = 0; i < codes.length; i++) {
              const code = codes[i];
              const currency = this.currency (code);
              const currencyId = currency['id'];
              if (currencyId in response) {
                  const account = this.account ();
                  const reserved = currencyId + '_reserved';
                  account['free'] = this.safeString (response, currencyId);
                  account['used'] = this.safeString (response, reserved);
                  result[code] = account;
              }
          }
          return this.safeBalance (result);
      }
  
      async fetchBalance (params = {}) {
          /**
           * @method
           * @name coincheck#fetchBalance
           * @description query for balance and get the amount of funds available for trading or funds locked in orders
           * @param {dict} params extra parameters specific to the coincheck api endpoint
           * @returns {dict} a [balance structure]{@link https://docs.ccxt.com/en/latest/manual.html?#balance-structure}
           */
          await this.loadMarkets ();
          const response = await this.privateGetAccountsBalance (params);
          return this.parseBalance (response);
      }
  
      async fetchOpenOrders (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          /**
           * @method
           * @name coincheck#fetchOpenOrders
           * @description fetch all unfilled currently open orders
           * @param {str|undefined} symbol unified market symbol
           * @param {int|undefined} since the earliest time in ms to fetch open orders for
           * @param {int|undefined} limit the maximum number of  open orders structures to retrieve
           * @param {dict} params extra parameters specific to the coincheck api endpoint
           * @returns {[dict]} a list of [order structures]{@link https://docs.ccxt.com/en/latest/manual.html#order-structure}
           */
          await this.loadMarkets ();
          // Only BTC/JPY is meaningful
          let market = undefined;
          if (symbol !== undefined) {
              market = this.market (symbol);
          }
          const response = await this.privateGetExchangeOrdersOpens (params);
          const rawOrders = this.safeValue (response, 'orders', []);
          const parsedOrders = this.parseOrders (rawOrders, market, since, limit);
          const result = [];
          for (let i = 0; i < parsedOrders.length; i++) {
              result.push (this.extend (parsedOrders[i], { 'status': 'open' }));
          }
          return result;
      }
  
      parseOrder (order, market = undefined) {
          //
          // fetchOpenOrders
          //
          //     {                        id:  202835,
          //                      order_type: "buy",
          //                            rate:  26890,
          //                            pair: "btc_jpy",
          //                  pending_amount: "0.5527",
          //       pending_market_buy_amount:  null,
          //                  stop_loss_rate:  null,
          //                      created_at: "2015-01-10T05:55:38.000Z" }
          //
          // todo: add formats for fetchOrder, fetchClosedOrders here
          //
          const id = this.safeString (order, 'id');
          const side = this.safeString (order, 'order_type');
          const timestamp = this.parse8601 (this.safeString (order, 'created_at'));
          const amount = this.safeString (order, 'pending_amount');
          const remaining = this.safeString (order, 'pending_amount');
          const price = this.safeString (order, 'rate');
          const status = undefined;
          const marketId = this.safeString (order, 'pair');
          const symbol = this.safeSymbol (marketId, market, '_');
          return this.safeOrder ({
              'id': id,
              'clientOrderId': undefined,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'lastTradeTimestamp': undefined,
              'amount': amount,
              'remaining': remaining,
              'filled': undefined,
              'side': side,
              'type': undefined,
              'timeInForce': undefined,
              'postOnly': undefined,
              'status': status,
              'symbol': symbol,
              'price': price,
              'stopPrice': undefined,
              'cost': undefined,
              'fee': undefined,
              'info': order,
              'average': undefined,
              'trades': undefined,
          }, market);
      }
  
      async fetchOrderBook (symbol, limit = undefined, params = {}) {
          /**
           * @method
           * @name coincheck#fetchOrderBook
           * @description fetches information on open orders with bid (buy) and ask (sell) prices, volumes and other data
           * @param {str} symbol unified symbol of the market to fetch the order book for
           * @param {int|undefined} limit the maximum amount of order book entries to return
           * @param {dict} params extra parameters specific to the coincheck api endpoint
           * @returns {dict} A dictionary of [order book structures]{@link https://docs.ccxt.com/en/latest/manual.html#order-book-structure} indexed by market symbols
           */
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'pair': market['id'],
          };
          const response = await this.publicGetOrderBooks (this.extend (request, params));
          return this.parseOrderBook (response, symbol);
      }
  
      parseTicker (ticker, market = undefined) {
          //
          // {
          //     "last":4192632.0,
          //     "bid":4192496.0,
          //     "ask":4193749.0,
          //     "high":4332000.0,
          //     "low":4101047.0,
          //     "volume":2313.43191762,
          //     "timestamp":1643374115
          // }
          //
          const symbol = this.safeSymbol (undefined, market);
          const timestamp = this.safeTimestamp (ticker, 'timestamp');
          const last = this.safeString (ticker, 'last');
          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, 'bid'),
              'bidVolume': undefined,
              'ask': this.safeString (ticker, 'ask'),
              'askVolume': undefined,
              'vwap': undefined,
              'open': undefined,
              'close': last,
              'last': last,
              'previousClose': undefined,
              'change': undefined,
              'percentage': undefined,
              'average': undefined,
              'baseVolume': this.safeString (ticker, 'volume'),
              'quoteVolume': undefined,
              'info': ticker,
          }, market);
      }
  
      async fetchTicker (symbol, params = {}) {
          /**
           * @method
           * @name coincheck#fetchTicker
           * @description fetches a price ticker, a statistical calculation with the information calculated over the past 24 hours for a specific market
           * @param {str} symbol unified symbol of the market to fetch the ticker for
           * @param {dict} params extra parameters specific to the coincheck api endpoint
           * @returns {dict} a [ticker structure]{@link https://docs.ccxt.com/en/latest/manual.html#ticker-structure}
           */
          if (symbol !== 'BTC/JPY') {
              throw new BadSymbol (this.id + ' fetchTicker() supports BTC/JPY only');
          }
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'pair': market['id'],
          };
          const ticker = await this.publicGetTicker (this.extend (request, params));
          //
          // {
          //     "last":4192632.0,
          //     "bid":4192496.0,
          //     "ask":4193749.0,
          //     "high":4332000.0,
          //     "low":4101047.0,
          //     "volume":2313.43191762,
          //     "timestamp":1643374115
          // }
          //
          return this.parseTicker (ticker, market);
      }
  
      parseTrade (trade, market = undefined) {
          //
          // fetchTrades (public)
          //
          //      {
          //          "id": "206849494",
          //          "amount": "0.01",
          //          "rate": "5598346.0",
          //          "pair": "btc_jpy",
          //          "order_type": "sell",
          //          "created_at": "2021-12-08T14:10:33.000Z"
          //      }
          //
          // fetchMyTrades (private) - example from docs
          //
          //      {
          //          "id": 38,
          //          "order_id": 49,
          //          "created_at": "2015-11-18T07:02:21.000Z",
          //          "funds": {
          //              "btc": "0.1",
          //              "jpy": "-4096.135"
          //                  },
          //           "pair": "btc_jpy",
          //           "rate": "40900.0",
          //           "fee_currency": "JPY",
          //           "fee": "6.135",
          //           "liquidity": "T",
          //           "side": "buy"
          //      }
          //
          const timestamp = this.parse8601 (this.safeString (trade, 'created_at'));
          const id = this.safeString (trade, 'id');
          const priceString = this.safeString (trade, 'rate');
          const marketId = this.safeString (trade, 'pair');
          market = this.safeValue (this.markets_by_id, marketId, market);
          let symbol = undefined;
          let baseId = undefined;
          let quoteId = undefined;
          if (marketId !== undefined) {
              if (marketId in this.markets_by_id) {
                  market = this.markets_by_id[marketId];
                  baseId = market['baseId'];
                  quoteId = market['quoteId'];
                  symbol = market['symbol'];
              } else {
                  const ids = marketId.split ('_');
                  baseId = ids[0];
                  quoteId = ids[1];
                  const base = this.safeCurrencyCode (baseId);
                  const quote = this.safeCurrencyCode (quoteId);
                  symbol = base + '/' + quote;
              }
          }
          if (symbol === undefined) {
              symbol = this.safeSymbol (undefined, market);
          }
          let takerOrMaker = undefined;
          let amountString = undefined;
          let costString = undefined;
          let side = undefined;
          let fee = undefined;
          let orderId = undefined;
          if ('liquidity' in trade) {
              if (this.safeString (trade, 'liquidity') === 'T') {
                  takerOrMaker = 'taker';
              } else if (this.safeString (trade, 'liquidity') === 'M') {
                  takerOrMaker = 'maker';
              }
              const funds = this.safeValue (trade, 'funds', {});
              amountString = this.safeString (funds, baseId);
              costString = this.safeString (funds, quoteId);
              fee = {
                  'currency': this.safeString (trade, 'fee_currency'),
                  'cost': this.safeString (trade, 'fee'),
              };
              side = this.safeString (trade, 'side');
              orderId = this.safeString (trade, 'order_id');
          } else {
              amountString = this.safeString (trade, 'amount');
              side = this.safeString (trade, 'order_type');
          }
          return this.safeTrade ({
              'id': id,
              'info': trade,
              'datetime': this.iso8601 (timestamp),
              'timestamp': timestamp,
              'symbol': symbol,
              'type': undefined,
              'side': side,
              'order': orderId,
              'takerOrMaker': takerOrMaker,
              'price': priceString,
              'amount': amountString,
              'cost': costString,
              'fee': fee,
          }, market);
      }
  
      async fetchMyTrades (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          /**
           * @method
           * @name coincheck#fetchMyTrades
           * @description fetch all trades made by the user
           * @param {str|undefined} symbol unified market symbol
           * @param {int|undefined} since the earliest time in ms to fetch trades for
           * @param {int|undefined} limit the maximum number of trades structures to retrieve
           * @param {dict} params extra parameters specific to the coincheck api endpoint
           * @returns {[dict]} a list of [trade structures]{@link https://docs.ccxt.com/en/latest/manual.html#trade-structure}
           */
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {};
          if (limit !== undefined) {
              request['limit'] = limit;
          }
          const response = await this.privateGetExchangeOrdersTransactionsPagination (this.extend (request, params));
          //
          //      {
          //          "success": true,
          //          "transactions": [
          //                              {
          //                                  "id": 38,
          //                                  "order_id": 49,
          //                                  "created_at": "2015-11-18T07:02:21.000Z",
          //                                  "funds": {
          //                                      "btc": "0.1",
          //                                      "jpy": "-4096.135"
          //                                          },
          //                                  "pair": "btc_jpy",
          //                                  "rate": "40900.0",
          //                                  "fee_currency": "JPY",
          //                                  "fee": "6.135",
          //                                  "liquidity": "T",
          //                                  "side": "buy"
          //                               },
          //                          ]
          //      }
          //
          const transactions = this.safeValue (response, 'transactions', []);
          return this.parseTrades (transactions, market, since, limit);
      }
  
      async fetchTrades (symbol, since = undefined, limit = undefined, params = {}) {
          /**
           * @method
           * @name coincheck#fetchTrades
           * @description get the list of most recent trades for a particular symbol
           * @param {str} symbol unified symbol of the market to fetch trades for
           * @param {int|undefined} since timestamp in ms of the earliest trade to fetch
           * @param {int|undefined} limit the maximum amount of trades to fetch
           * @param {dict} params extra parameters specific to the coincheck api endpoint
           * @returns {[dict]} a list of [trade structures]{@link https://docs.ccxt.com/en/latest/manual.html?#public-trades}
           */
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'pair': market['id'],
          };
          if (limit !== undefined) {
              request['limit'] = limit;
          }
          const response = await this.publicGetTrades (this.extend (request, params));
          //
          //      {
          //          "id": "206849494",
          //          "amount": "0.01",
          //          "rate": "5598346.0",
          //          "pair": "btc_jpy",
          //          "order_type": "sell",
          //          "created_at": "2021-12-08T14:10:33.000Z"
          //      }
          //
          const data = this.safeValue (response, 'data', []);
          return this.parseTrades (data, market, since, limit);
      }
  
      async fetchTradingFees (params = {}) {
          /**
           * @method
           * @name coincheck#fetchTradingFees
           * @description fetch the trading fees for multiple markets
           * @param {dict} params extra parameters specific to the coincheck api endpoint
           * @returns {dict} a dictionary of [fee structures]{@link https://docs.ccxt.com/en/latest/manual.html#fee-structure} indexed by market symbols
           */
          await this.loadMarkets ();
          const response = await this.privateGetAccounts (params);
          //
          //     {
          //         success: true,
          //         id: '7487995',
          //         email: 'some@email.com',
          //         identity_status: 'identity_pending',
          //         bitcoin_address: null,
          //         lending_leverage: '4',
          //         taker_fee: '0.0',
          //         maker_fee: '0.0',
          //         exchange_fees: {
          //           btc_jpy: { taker_fee: '0.0', maker_fee: '0.0' },
          //           etc_jpy: { taker_fee: '0.0', maker_fee: '0.0' },
          //           fct_jpy: { taker_fee: '0.0', maker_fee: '0.0' },
          //           mona_jpy: { taker_fee: '0.0', maker_fee: '0.0' },
          //           plt_jpy: { taker_fee: '0.0', maker_fee: '0.0' }
          //         }
          //     }
          //
          const fees = this.safeValue (response, 'exchange_fees', {});
          const result = {};
          for (let i = 0; i < this.symbols.length; i++) {
              const symbol = this.symbols[i];
              const market = this.market (symbol);
              const fee = this.safeValue (fees, market['id'], {});
              result[symbol] = {
                  'info': fee,
                  'symbol': symbol,
                  'maker': this.safeNumber (fee, 'maker_fee'),
                  'taker': this.safeNumber (fee, 'taker_fee'),
                  'percentage': true,
                  'tierBased': false,
              };
          }
          return result;
      }
  
      async createOrder (symbol, type, side, amount, price = undefined, params = {}) {
          /**
           * @method
           * @name coincheck#createOrder
           * @description create a trade order
           * @param {str} symbol unified symbol of the market to create an order in
           * @param {str} type 'market' or 'limit'
           * @param {str} side 'buy' or 'sell'
           * @param {float} amount how much of currency you want to trade in units of base currency
           * @param {float} price the price at which the order is to be fullfilled, in units of the quote currency, ignored in market orders
           * @param {dict} params extra parameters specific to the coincheck api endpoint
           * @returns {dict} an [order structure]{@link https://docs.ccxt.com/en/latest/manual.html#order-structure}
           */
          await this.loadMarkets ();
          const request = {
              'pair': this.marketId (symbol),
          };
          if (type === 'market') {
              const order_type = type + '_' + side;
              request['order_type'] = order_type;
              const prefix = (side === 'buy') ? (order_type + '_') : '';
              request[prefix + 'amount'] = amount;
          } else {
              request['order_type'] = side;
              request['rate'] = price;
              request['amount'] = amount;
          }
          const response = await this.privatePostExchangeOrders (this.extend (request, params));
          const id = this.safeString (response, 'id');
          return {
              'info': response,
              'id': id,
          };
      }
  
      async cancelOrder (id, symbol = undefined, params = {}) {
          /**
           * @method
           * @name coincheck#cancelOrder
           * @description cancels an open order
           * @param {str} id order id
           * @param {str|undefined} symbol not used by coincheck cancelOrder ()
           * @param {dict} params extra parameters specific to the coincheck api endpoint
           * @returns {dict} An [order structure]{@link https://docs.ccxt.com/en/latest/manual.html#order-structure}
           */
          const request = {
              'id': id,
          };
          return await this.privateDeleteExchangeOrdersId (this.extend (request, params));
      }
  
      async fetchDeposits (code = undefined, since = undefined, limit = undefined, params = {}) {
          /**
           * @method
           * @name coincheck#fetchDeposits
           * @description fetch all deposits made to an account
           * @param {str|undefined} code unified currency code
           * @param {int|undefined} since the earliest time in ms to fetch deposits for
           * @param {int|undefined} limit the maximum number of deposits structures to retrieve
           * @param {dict} params extra parameters specific to the coincheck api endpoint
           * @returns {[dict]} a list of [transaction structures]{@link https://docs.ccxt.com/en/latest/manual.html#transaction-structure}
           */
          await this.loadMarkets ();
          let currency = undefined;
          const request = {};
          if (code !== undefined) {
              currency = this.currency (code);
              request['currency'] = currency['id'];
          }
          if (limit !== undefined) {
              request['limit'] = limit;
          }
          const response = await this.privateGetDepositMoney (this.extend (request, params));
          // {
          //   "success": true,
          //   "deposits": [
          //     {
          //       "id": 2,
          //       "amount": "0.05",
          //       "currency": "BTC",
          //       "address": "13PhzoK8me3u5nHzzFD85qT9RqEWR9M4Ty",
          //       "status": "confirmed",
          //       "confirmed_at": "2015-06-13T08:29:18.000Z",
          //       "created_at": "2015-06-13T08:22:18.000Z"
          //     },
          //     {
          //       "id": 1,
          //       "amount": "0.01",
          //       "currency": "BTC",
          //       "address": "13PhzoK8me3u5nHzzFD85qT9RqEWR9M4Ty",
          //       "status": "received",
          //       "confirmed_at": "2015-06-13T08:21:18.000Z",
          //       "created_at": "2015-06-13T08:21:18.000Z"
          //     }
          //   ]
          // }
          const data = this.safeValue (response, 'deposits', []);
          return this.parseTransactions (data, currency, since, limit, { 'type': 'deposit' });
      }
  
      async fetchWithdrawals (code = undefined, since = undefined, limit = undefined, params = {}) {
          /**
           * @method
           * @name coincheck#fetchWithdrawals
           * @description fetch all withdrawals made from an account
           * @param {str|undefined} code unified currency code
           * @param {int|undefined} since the earliest time in ms to fetch withdrawals for
           * @param {int|undefined} limit the maximum number of withdrawals structures to retrieve
           * @param {dict} params extra parameters specific to the coincheck api endpoint
           * @returns {[dict]} a list of [transaction structures]{@link https://docs.ccxt.com/en/latest/manual.html#transaction-structure}
           */
          await this.loadMarkets ();
          let currency = undefined;
          if (code !== undefined) {
              currency = this.currency (code);
          }
          const request = {};
          if (limit !== undefined) {
              request['limit'] = limit;
          }
          const response = await this.privateGetWithdraws (this.extend (request, params));
          //  {
          //   "success": true,
          //   "pagination": {
          //     "limit": 25,
          //     "order": "desc",
          //     "starting_after": null,
          //     "ending_before": null
          //   },
          //   "data": [
          //     {
          //       "id": 398,
          //       "status": "finished",
          //       "amount": "242742.0",
          //       "currency": "JPY",
          //       "created_at": "2014-12-04T15:00:00.000Z",
          //       "bank_account_id": 243,
          //       "fee": "400.0",
          //       "is_fast": true
          //     }
          //   ]
          // }
          const data = this.safeValue (response, 'data', []);
          return this.parseTransactions (data, currency, since, limit, { 'type': 'withdrawal' });
      }
  
      parseTransactionStatus (status) {
          const statuses = {
              // withdrawals
              'pending': 'pending',
              'processing': 'pending',
              'finished': 'ok',
              'canceled': 'canceled',
              // deposits
              'confirmed': 'pending',
              'received': 'ok',
          };
          return this.safeString (statuses, status, status);
      }
  
      parseTransaction (transaction, currency = undefined) {
          //
          // fetchDeposits
          //
          // {
          //       "id": 2,
          //       "amount": "0.05",
          //       "currency": "BTC",
          //       "address": "13PhzoK8me3u5nHzzFD85qT9RqEWR9M4Ty",
          //       "status": "confirmed",
          //       "confirmed_at": "2015-06-13T08:29:18.000Z",
          //       "created_at": "2015-06-13T08:22:18.000Z"
          //  }
          //
          // fetchWithdrawals
          //
          //  {
          //       "id": 398,
          //       "status": "finished",
          //       "amount": "242742.0",
          //       "currency": "JPY",
          //       "created_at": "2014-12-04T15:00:00.000Z",
          //       "bank_account_id": 243,
          //       "fee": "400.0",
          //       "is_fast": true
          //  }
          //
          const id = this.safeString (transaction, 'id');
          const timestamp = this.parse8601 (this.safeString (transaction, 'created_at'));
          const address = this.safeString (transaction, 'address');
          const amount = this.safeNumber (transaction, 'amount');
          const currencyId = this.safeString (transaction, 'currency');
          const code = this.safeCurrencyCode (currencyId, currency);
          const status = this.parseTransactionStatus (this.safeString (transaction, 'status'));
          const updated = this.parse8601 (this.safeString (transaction, 'confirmed_at'));
          let fee = undefined;
          const feeCost = this.safeNumber (transaction, 'fee');
          if (feeCost !== undefined) {
              fee = {
                  'cost': feeCost,
                  'currency': code,
              };
          }
          return {
              'info': transaction,
              'id': id,
              'txid': undefined,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'network': undefined,
              'address': address,
              'addressTo': address,
              'addressFrom': undefined,
              'tag': undefined,
              'tagTo': undefined,
              'tagFrom': undefined,
              'type': undefined,
              'amount': amount,
              'currency': code,
              'status': status,
              'updated': updated,
              'internal': undefined,
              'fee': fee,
          };
      }
  
      nonce () {
          return this.milliseconds ();
      }
  
      sign (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
          let url = this.urls['api'] + '/' + this.implodeParams (path, params);
          const query = this.omit (params, this.extractParams (path));
          if (api === 'public') {
              if (Object.keys (query).length) {
                  url += '?' + this.urlencode (query);
              }
          } else {
              this.checkRequiredCredentials ();
              const nonce = this.nonce ().toString ();
              let queryString = '';
              if (method === 'GET') {
                  if (Object.keys (query).length) {
                      url += '?' + this.urlencode (this.keysort (query));
                  }
              } else {
                  if (Object.keys (query).length) {
                      body = this.urlencode (this.keysort (query));
                      queryString = body;
                  }
              }
              const auth = nonce + url + queryString;
              headers = {
                  'Content-Type': 'application/x-www-form-urlencoded',
                  'ACCESS-KEY': this.apiKey,
                  'ACCESS-NONCE': nonce,
                  'ACCESS-SIGNATURE': this.hmac (this.encode (auth), this.encode (this.secret)),
              };
          }
          return { 'url': url, 'method': method, 'body': body, 'headers': headers };
      }
  
      handleErrors (httpCode, reason, url, method, headers, body, response, requestHeaders, requestBody) {
          if (response === undefined) {
              return;
          }
          //
          //     {"success":false,"error":"disabled API Key"}'
          //     {"success":false,"error":"invalid authentication"}
          //
          const success = this.safeValue (response, 'success', true);
          if (!success) {
              const error = this.safeString (response, 'error');
              const feedback = this.id + ' ' + this.json (response);
              this.throwExactlyMatchedException (this.exceptions['exact'], error, feedback);
              this.throwBroadlyMatchedException (this.exceptions['broad'], body, feedback);
              throw new ExchangeError (this.id + ' ' + this.json (response));
          }
      }
  };
  