text: 'use strict';
  
  //  ---------------------------------------------------------------------------
  
  const Exchange = require ('./base/Exchange');
  const { ExchangeError, InvalidNonce, AuthenticationError, OrderNotFound } = require ('./base/errors');
  const { TICK_SIZE } = require ('./base/functions/number');
  const Precise = require ('./base/Precise');
  
  //  ---------------------------------------------------------------------------
  
  module.exports = class bitso extends Exchange {
      describe () {
          return this.deepExtend (super.describe (), {
              'id': 'bitso',
              'name': 'Bitso',
              'countries': [ 'MX' ], // Mexico
              'rateLimit': 2000, // 30 requests per minute
              'version': 'v3',
              'has': {
                  'cancelOrder': true,
                  'CORS': undefined,
                  'createOrder': true,
                  'fetchBalance': true,
                  'fetchDepositAddress': true,
                  'fetchMarkets': true,
                  'fetchMyTrades': true,
                  'fetchOpenOrders': true,
                  'fetchOrder': true,
                  'fetchOrderBook': true,
                  'fetchOrderTrades': true,
                  'fetchTicker': true,
                  'fetchTrades': true,
                  'withdraw': true,
              },
              'urls': {
                  'logo': 'https://user-images.githubusercontent.com/51840849/87295554-11f98280-c50e-11ea-80d6-15b3bafa8cbf.jpg',
                  'api': 'https://api.bitso.com',
                  'www': 'https://bitso.com',
                  'doc': 'https://bitso.com/api_info',
                  'fees': 'https://bitso.com/fees',
                  'referral': 'https://bitso.com/?ref=itej',
              },
              'precisionMode': TICK_SIZE,
              'options': {
                  'precision': {
                      'XRP': 0.000001,
                      'MXN': 0.01,
                      'TUSD': 0.01,
                  },
                  'defaultPrecision': 0.00000001,
              },
              'api': {
                  'public': {
                      'get': [
                          'available_books',
                          'ticker',
                          'order_book',
                          'trades',
                      ],
                  },
                  'private': {
                      'get': [
                          'account_status',
                          'balance',
                          'fees',
                          'fundings',
                          'fundings/{fid}',
                          'funding_destination',
                          'kyc_documents',
                          'ledger',
                          'ledger/trades',
                          'ledger/fees',
                          'ledger/fundings',
                          'ledger/withdrawals',
                          'mx_bank_codes',
                          'open_orders',
                          'order_trades/{oid}',
                          'orders/{oid}',
                          'user_trades',
                          'user_trades/{tid}',
                          'withdrawals/',
                          'withdrawals/{wid}',
                      ],
                      'post': [
                          'bitcoin_withdrawal',
                          'debit_card_withdrawal',
                          'ether_withdrawal',
                          'ripple_withdrawal',
                          'bcash_withdrawal',
                          'litecoin_withdrawal',
                          'orders',
                          'phone_number',
                          'phone_verification',
                          'phone_withdrawal',
                          'spei_withdrawal',
                          'ripple_withdrawal',
                          'bcash_withdrawal',
                          'litecoin_withdrawal',
                      ],
                      'delete': [
                          'orders/{oid}',
                          'orders/all',
                      ],
                  },
              },
              'exceptions': {
                  '0201': AuthenticationError, // Invalid Nonce or Invalid Credentials
                  '104': InvalidNonce, // Cannot perform request - nonce must be higher than 1520307203724237
              },
          });
      }
  
      async fetchMarkets (params = {}) {
          const response = await this.publicGetAvailableBooks (params);
          //
          //     {
          //         "success":true,
          //         "payload":[
          //             {
          //                 "book":"btc_mxn",
          //                 "minimum_price":"500",
          //                 "maximum_price":"10000000",
          //                 "minimum_amount":"0.00005",
          //                 "maximum_amount":"500",
          //                 "minimum_value":"5",
          //                 "maximum_value":"10000000",
          //                 "tick_size":"0.01",
          //                 "fees":{
          //                     "flat_rate":{"maker":"0.500","taker":"0.650"},
          //                     "structure":[
          //                         {"volume":"1500000","maker":"0.00500","taker":"0.00650"},
          //                         {"volume":"2000000","maker":"0.00490","taker":"0.00637"},
          //                         {"volume":"5000000","maker":"0.00480","taker":"0.00624"},
          //                         {"volume":"7000000","maker":"0.00440","taker":"0.00572"},
          //                         {"volume":"10000000","maker":"0.00420","taker":"0.00546"},
          //                         {"volume":"15000000","maker":"0.00400","taker":"0.00520"},
          //                         {"volume":"35000000","maker":"0.00370","taker":"0.00481"},
          //                         {"volume":"50000000","maker":"0.00300","taker":"0.00390"},
          //                         {"volume":"150000000","maker":"0.00200","taker":"0.00260"},
          //                         {"volume":"250000000","maker":"0.00100","taker":"0.00130"},
          //                         {"volume":"9999999999","maker":"0.00000","taker":"0.00130"},
          //                     ]
          //                 }
          //             },
          //         ]
          //     }
          const markets = this.safeValue (response, 'payload');
          const result = [];
          for (let i = 0; i < markets.length; i++) {
              const market = markets[i];
              const id = this.safeString (market, 'book');
              const [ baseId, quoteId ] = id.split ('_');
              let base = baseId.toUpperCase ();
              let quote = quoteId.toUpperCase ();
              base = this.safeCurrencyCode (base);
              quote = this.safeCurrencyCode (quote);
              const symbol = base + '/' + quote;
              const limits = {
                  'amount': {
                      'min': this.safeNumber (market, 'minimum_amount'),
                      'max': this.safeNumber (market, 'maximum_amount'),
                  },
                  'price': {
                      'min': this.safeNumber (market, 'minimum_price'),
                      'max': this.safeNumber (market, 'maximum_price'),
                  },
                  'cost': {
                      'min': this.safeNumber (market, 'minimum_value'),
                      'max': this.safeNumber (market, 'maximum_value'),
                  },
              };
              const defaultPricePrecision = this.safeNumber (this.options['precision'], quote, this.options['defaultPrecision']);
              const pricePrecision = this.safeNumber (market, 'tick_size', defaultPricePrecision);
              const precision = {
                  'amount': this.safeNumber (this.options['precision'], base, this.options['defaultPrecision']),
                  'price': pricePrecision,
              };
              const fees = this.safeValue (market, 'fees', {});
              const flatRate = this.safeValue (fees, 'flat_rate', {});
              const makerString = this.safeString (flatRate, 'maker');
              const takerString = this.safeString (flatRate, 'taker');
              const maker = this.parseNumber (Precise.stringDiv (makerString, '100'));
              const taker = this.parseNumber (Precise.stringDiv (takerString, '100'));
              const feeTiers = this.safeValue (fees, 'structure', []);
              const fee = {
                  'taker': taker,
                  'maker': maker,
                  'percentage': true,
                  'tierBased': true,
              };
              const takerFees = [];
              const makerFees = [];
              for (let j = 0; j < feeTiers.length; j++) {
                  const tier = feeTiers[j];
                  const volume = this.safeNumber (tier, 'volume');
                  const takerFee = this.safeNumber (tier, 'taker');
                  const makerFee = this.safeNumber (tier, 'maker');
                  takerFees.push ([ volume, takerFee ]);
                  makerFees.push ([ volume, makerFee ]);
                  if (j === 0) {
                      fee['taker'] = takerFee;
                      fee['maker'] = makerFee;
                  }
              }
              const tiers = {
                  'taker': takerFees,
                  'maker': makerFees,
              };
              fee['tiers'] = tiers;
              result.push (this.extend ({
                  'id': id,
                  'symbol': symbol,
                  'base': base,
                  'quote': quote,
                  'baseId': baseId,
                  'quoteId': quoteId,
                  'info': market,
                  'limits': limits,
                  'precision': precision,
                  'type': 'spot',
                  'spot': true,
                  'active': undefined,
              }, fee));
          }
          return result;
      }
  
      async fetchBalance (params = {}) {
          await this.loadMarkets ();
          const response = await this.privateGetBalance (params);
          //
          //     {
          //       "success": true,
          //       "payload": {
          //         "balances": [
          //           {
          //             "currency": "bat",
          //             "available": "0.00000000",
          //             "locked": "0.00000000",
          //             "total": "0.00000000",
          //             "pending_deposit": "0.00000000",
          //             "pending_withdrawal": "0.00000000"
          //           },
          //           {
          //             "currency": "bch",
          //             "available": "0.00000000",
          //             "locked": "0.00000000",
          //             "total": "0.00000000",
          //             "pending_deposit": "0.00000000",
          //             "pending_withdrawal": "0.00000000"
          //           },
          //         ],
          //       },
          //     }
          //
          const payload = this.safeValue (response, 'payload', {});
          const balances = this.safeValue (payload, 'balances');
          const result = {
              'info': response,
              'timestamp': undefined,
              'datetime': undefined,
          };
          for (let i = 0; i < balances.length; i++) {
              const balance = balances[i];
              const currencyId = this.safeString (balance, 'currency');
              const code = this.safeCurrencyCode (currencyId);
              const account = this.account ();
              account['free'] = this.safeString (balance, 'available');
              account['used'] = this.safeString (balance, 'locked');
              account['total'] = this.safeString (balance, 'total');
              result[code] = account;
          }
          return this.parseBalance (result);
      }
  
      async fetchOrderBook (symbol, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {
              'book': this.marketId (symbol),
          };
          const response = await this.publicGetOrderBook (this.extend (request, params));
          const orderbook = this.safeValue (response, 'payload');
          const timestamp = this.parse8601 (this.safeString (orderbook, 'updated_at'));
          return this.parseOrderBook (orderbook, symbol, timestamp, 'bids', 'asks', 'price', 'amount');
      }
  
      async fetchTicker (symbol, params = {}) {
          await this.loadMarkets ();
          const request = {
              'book': this.marketId (symbol),
          };
          const response = await this.publicGetTicker (this.extend (request, params));
          const ticker = this.safeValue (response, 'payload');
          const timestamp = this.parse8601 (this.safeString (ticker, 'created_at'));
          const vwap = this.safeNumber (ticker, 'vwap');
          const baseVolume = this.safeNumber (ticker, 'volume');
          let quoteVolume = undefined;
          if (baseVolume !== undefined && vwap !== undefined) {
              quoteVolume = baseVolume * vwap;
          }
          const last = this.safeNumber (ticker, 'last');
          return {
              'symbol': symbol,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'high': this.safeNumber (ticker, 'high'),
              'low': this.safeNumber (ticker, 'low'),
              'bid': this.safeNumber (ticker, 'bid'),
              'bidVolume': undefined,
              'ask': this.safeNumber (ticker, 'ask'),
              'askVolume': undefined,
              'vwap': vwap,
              'open': undefined,
              'close': last,
              'last': last,
              'previousClose': undefined,
              'change': undefined,
              'percentage': undefined,
              'average': undefined,
              'baseVolume': baseVolume,
              'quoteVolume': quoteVolume,
              'info': ticker,
          };
      }
  
      parseTrade (trade, market = undefined) {
          const timestamp = this.parse8601 (this.safeString (trade, 'created_at'));
          const marketId = this.safeString (trade, 'book');
          const symbol = this.safeSymbol (marketId, market, '_');
          const side = this.safeString2 (trade, 'side', 'maker_side');
          let amount = this.safeNumber2 (trade, 'amount', 'major');
          if (amount !== undefined) {
              amount = Math.abs (amount);
          }
          let fee = undefined;
          const feeCost = this.safeNumber (trade, 'fees_amount');
          if (feeCost !== undefined) {
              const feeCurrencyId = this.safeString (trade, 'fees_currency');
              const feeCurrency = this.safeCurrencyCode (feeCurrencyId);
              fee = {
                  'cost': feeCost,
                  'currency': feeCurrency,
              };
          }
          let cost = this.safeNumber (trade, 'minor');
          if (cost !== undefined) {
              cost = Math.abs (cost);
          }
          const price = this.safeNumber (trade, 'price');
          const orderId = this.safeString (trade, 'oid');
          const id = this.safeString (trade, 'tid');
          return {
              'id': id,
              'info': trade,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'symbol': symbol,
              'order': orderId,
              'type': undefined,
              'side': side,
              'takerOrMaker': undefined,
              'price': price,
              'amount': amount,
              'cost': cost,
              'fee': fee,
          };
      }
  
      async fetchTrades (symbol, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'book': market['id'],
          };
          const response = await this.publicGetTrades (this.extend (request, params));
          return this.parseTrades (response['payload'], market, since, limit);
      }
  
      async fetchMyTrades (symbol = undefined, since = undefined, limit = 25, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          // the don't support fetching trades starting from a date yet
          // use the `marker` extra param for that
          // this is not a typo, the variable name is 'marker' (don't confuse with 'market')
          const markerInParams = ('marker' in params);
          // warn the user with an exception if the user wants to filter
          // starting from since timestamp, but does not set the trade id with an extra 'marker' param
          if ((since !== undefined) && !markerInParams) {
              throw new ExchangeError (this.id + ' fetchMyTrades does not support fetching trades starting from a timestamp with the `since` argument, use the `marker` extra param to filter starting from an integer trade id');
          }
          // convert it to an integer unconditionally
          if (markerInParams) {
              params = this.extend (params, {
                  'marker': parseInt (params['marker']),
              });
          }
          const request = {
              'book': market['id'],
              'limit': limit, // default = 25, max = 100
              // 'sort': 'desc', // default = desc
              // 'marker': id, // integer id to start from
          };
          const response = await this.privateGetUserTrades (this.extend (request, params));
          return this.parseTrades (response['payload'], market, since, limit);
      }
  
      async createOrder (symbol, type, side, amount, price = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {
              'book': this.marketId (symbol),
              'side': side,
              'type': type,
              'major': this.amountToPrecision (symbol, amount),
          };
          if (type === 'limit') {
              request['price'] = this.priceToPrecision (symbol, price);
          }
          const response = await this.privatePostOrders (this.extend (request, params));
          const id = this.safeString (response['payload'], 'oid');
          return {
              'info': response,
              'id': id,
          };
      }
  
      async cancelOrder (id, symbol = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {
              'oid': id,
          };
          return await this.privateDeleteOrdersOid (this.extend (request, params));
      }
  
      parseOrderStatus (status) {
          const statuses = {
              'partial-fill': 'open', // this is a common substitution in ccxt
              'completed': 'closed',
          };
          return this.safeString (statuses, status, status);
      }
  
      parseOrder (order, market = undefined) {
          const id = this.safeString (order, 'oid');
          const side = this.safeString (order, 'side');
          const status = this.parseOrderStatus (this.safeString (order, 'status'));
          const marketId = this.safeString (order, 'book');
          const symbol = this.safeSymbol (marketId, market, '_');
          const orderType = this.safeString (order, 'type');
          const timestamp = this.parse8601 (this.safeString (order, 'created_at'));
          const price = this.safeString (order, 'price');
          const amount = this.safeString (order, 'original_amount');
          const remaining = this.safeString (order, 'unfilled_amount');
          const clientOrderId = this.safeString (order, 'client_id');
          return this.safeOrder2 ({
              'info': order,
              'id': id,
              'clientOrderId': clientOrderId,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'lastTradeTimestamp': undefined,
              'symbol': symbol,
              'type': orderType,
              'timeInForce': undefined,
              'postOnly': undefined,
              'side': side,
              'price': price,
              'stopPrice': undefined,
              'amount': amount,
              'cost': undefined,
              'remaining': remaining,
              'filled': undefined,
              'status': status,
              'fee': undefined,
              'average': undefined,
              'trades': undefined,
          });
      }
  
      async fetchOpenOrders (symbol = undefined, since = undefined, limit = 25, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          // the don't support fetching trades starting from a date yet
          // use the `marker` extra param for that
          // this is not a typo, the variable name is 'marker' (don't confuse with 'market')
          const markerInParams = ('marker' in params);
          // warn the user with an exception if the user wants to filter
          // starting from since timestamp, but does not set the trade id with an extra 'marker' param
          if ((since !== undefined) && !markerInParams) {
              throw new ExchangeError (this.id + ' fetchOpenOrders does not support fetching orders starting from a timestamp with the `since` argument, use the `marker` extra param to filter starting from an integer trade id');
          }
          // convert it to an integer unconditionally
          if (markerInParams) {
              params = this.extend (params, {
                  'marker': parseInt (params['marker']),
              });
          }
          const request = {
              'book': market['id'],
              'limit': limit, // default = 25, max = 100
              // 'sort': 'desc', // default = desc
              // 'marker': id, // integer id to start from
          };
          const response = await this.privateGetOpenOrders (this.extend (request, params));
          const orders = this.parseOrders (response['payload'], market, since, limit);
          return orders;
      }
  
      async fetchOrder (id, symbol = undefined, params = {}) {
          await this.loadMarkets ();
          const response = await this.privateGetOrdersOid ({
              'oid': id,
          });
          const payload = this.safeValue (response, 'payload');
          if (Array.isArray (payload)) {
              const numOrders = response['payload'].length;
              if (numOrders === 1) {
                  return this.parseOrder (payload[0]);
              }
          }
          throw new OrderNotFound (this.id + ': The order ' + id + ' not found.');
      }
  
      async fetchOrderTrades (id, symbol = undefined, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'oid': id,
          };
          const response = await this.privateGetOrderTradesOid (this.extend (request, params));
          return this.parseTrades (response['payload'], market);
      }
  
      async fetchDepositAddress (code, params = {}) {
          await this.loadMarkets ();
          const currency = this.currency (code);
          const request = {
              'fund_currency': currency['id'],
          };
          const response = await this.privateGetFundingDestination (this.extend (request, params));
          let address = this.safeString (response['payload'], 'account_identifier');
          let tag = undefined;
          if (address.indexOf ('?dt=') >= 0) {
              const parts = address.split ('?dt=');
              address = this.safeString (parts, 0);
              tag = this.safeString (parts, 1);
          }
          this.checkAddress (address);
          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 methods = {
              'BTC': 'Bitcoin',
              'ETH': 'Ether',
              'XRP': 'Ripple',
              'BCH': 'Bcash',
              'LTC': 'Litecoin',
          };
          const method = (code in methods) ? methods[code] : undefined;
          if (method === undefined) {
              throw new ExchangeError (this.id + ' not valid withdraw coin: ' + code);
          }
          const request = {
              'amount': amount,
              'address': address,
              'destination_tag': tag,
          };
          const classMethod = 'privatePost' + method + 'Withdrawal';
          const response = await this[classMethod] (this.extend (request, params));
          return {
              'info': response,
              'id': this.safeString (response['payload'], 'wid'),
          };
      }
  
      sign (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
          let endpoint = '/' + this.version + '/' + this.implodeParams (path, params);
          const query = this.omit (params, this.extractParams (path));
          if (method === 'GET') {
              if (Object.keys (query).length) {
                  endpoint += '?' + this.urlencode (query);
              }
          }
          const url = this.urls['api'] + endpoint;
          if (api === 'private') {
              this.checkRequiredCredentials ();
              const nonce = this.nonce ().toString ();
              let request = [ nonce, method, endpoint ].join ('');
              if (method !== 'GET') {
                  if (Object.keys (query).length) {
                      body = this.json (query);
                      request += body;
                  }
              }
              const signature = this.hmac (this.encode (request), this.encode (this.secret));
              const auth = this.apiKey + ':' + nonce + ':' + signature;
              headers = {
                  'Authorization': 'Bitso ' + auth,
                  'Content-Type': 'application/json',
              };
          }
          return { 'url': url, 'method': method, 'body': body, 'headers': headers };
      }
  
      handleErrors (httpCode, reason, url, method, headers, body, response, requestHeaders, requestBody) {
          if (response === undefined) {
              return; // fallback to default error handler
          }
          if ('success' in response) {
              //
              //     {"success":false,"error":{"code":104,"message":"Cannot perform request - nonce must be higher than 1520307203724237"}}
              //
              let success = this.safeValue (response, 'success', false);
              if (typeof success === 'string') {
                  if ((success === 'true') || (success === '1')) {
                      success = true;
                  } else {
                      success = false;
                  }
              }
              if (!success) {
                  const feedback = this.id + ' ' + this.json (response);
                  const error = this.safeValue (response, 'error');
                  if (error === undefined) {
                      throw new ExchangeError (feedback);
                  }
                  const code = this.safeString (error, 'code');
                  this.throwExactlyMatchedException (this.exceptions, code, feedback);
                  throw new ExchangeError (feedback);
              }
          }
      }
  };
  