text: 'use strict';
  
  //  ---------------------------------------------------------------------------
  
  const Exchange = require ('./base/Exchange');
  const { ExchangeError, AuthenticationError, DDoSProtection, InvalidOrder, InsufficientFunds } = require ('./base/errors');
  
  //  ---------------------------------------------------------------------------
  
  module.exports = class btcalpha extends Exchange {
      describe () {
          return this.deepExtend (super.describe (), {
              'id': 'btcalpha',
              'name': 'BTC-Alpha',
              'countries': [ 'US' ],
              'version': 'v1',
              'has': {
                  'fetchTicker': false,
                  'fetchOHLCV': true,
                  'fetchOrders': true,
                  'fetchOpenOrders': true,
                  'fetchClosedOrders': true,
                  'fetchMyTrades': true,
              },
              'timeframes': {
                  '1m': '1',
                  '5m': '5',
                  '15m': '15',
                  '30m': '30',
                  '1h': '60',
                  '4h': '240',
                  '1d': 'D',
              },
              'urls': {
                  'logo': 'https://user-images.githubusercontent.com/1294454/42625213-dabaa5da-85cf-11e8-8f99-aa8f8f7699f0.jpg',
                  'api': 'https://btc-alpha.com/api',
                  'www': 'https://btc-alpha.com',
                  'doc': 'https://btc-alpha.github.io/api-docs',
                  'fees': 'https://btc-alpha.com/fees/',
                  'referral': 'https://btc-alpha.com/?r=123788',
              },
              'api': {
                  'public': {
                      'get': [
                          'currencies/',
                          'pairs/',
                          'orderbook/{pair_name}/',
                          'exchanges/',
                          'charts/{pair}/{type}/chart/',
                      ],
                  },
                  'private': {
                      'get': [
                          'wallets/',
                          'orders/own/',
                          'order/{id}/',
                          'exchanges/own/',
                          'deposits/',
                          'withdraws/',
                      ],
                      'post': [
                          'order/',
                          'order-cancel/',
                      ],
                  },
              },
              'fees': {
                  'trading': {
                      'maker': 0.2 / 100,
                      'taker': 0.2 / 100,
                  },
                  'funding': {
                      'withdraw': {
                          'BTC': 0.00135,
                          'LTC': 0.0035,
                          'XMR': 0.018,
                          'ZEC': 0.002,
                          'ETH': 0.01,
                          'ETC': 0.01,
                          'SIB': 1.5,
                          'CCRB': 4,
                          'PZM': 0.05,
                          'ITI': 0.05,
                          'DCY': 5,
                          'R': 5,
                          'ATB': 0.05,
                          'BRIA': 0.05,
                          'KZC': 0.05,
                          'HWC': 1,
                          'SPA': 1,
                          'SMS': 0.001,
                          'REC': 0.01,
                          'SUP': 1,
                          'BQ': 100,
                          'GDS': 0.1,
                          'EVN': 300,
                          'TRKC': 0.01,
                          'UNI': 1,
                          'STN': 1,
                          'BCH': undefined,
                          'QBIC': 0.5,
                      },
                  },
              },
              'commonCurrencies': {
                  'CBC': 'Cashbery',
              },
              'exceptions': {
                  'exact': {},
                  'broad': {
                      'Out of balance': InsufficientFunds, // {"date":1570599531.4814300537,"error":"Out of balance -9.99243661 BTC"}
                  },
              },
          });
      }
  
      async fetchMarkets (params = {}) {
          const response = await this.publicGetPairs (params);
          const result = [];
          for (let i = 0; i < response.length; i++) {
              const market = response[i];
              const id = this.safeString (market, 'name');
              const baseId = this.safeString (market, 'currency1');
              const quoteId = this.safeString (market, 'currency2');
              const base = this.safeCurrencyCode (baseId);
              const quote = this.safeCurrencyCode (quoteId);
              const symbol = base + '/' + quote;
              const precision = {
                  'amount': 8,
                  'price': this.safeInteger (market, 'price_precision'),
              };
              result.push ({
                  'id': id,
                  'symbol': symbol,
                  'base': base,
                  'quote': quote,
                  'active': true,
                  'precision': precision,
                  'limits': {
                      'amount': {
                          'min': this.safeFloat (market, 'minimum_order_size'),
                          'max': this.safeFloat (market, 'maximum_order_size'),
                      },
                      'price': {
                          'min': Math.pow (10, -precision['price']),
                          'max': Math.pow (10, precision['price']),
                      },
                      'cost': {
                          'min': undefined,
                          'max': undefined,
                      },
                  },
                  'info': market,
                  'baseId': undefined,
                  'quoteId': undefined,
              });
          }
          return result;
      }
  
      async fetchOrderBook (symbol, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {
              'pair_name': this.marketId (symbol),
          };
          if (limit) {
              request['limit_sell'] = limit;
              request['limit_buy'] = limit;
          }
          const response = await this.publicGetOrderbookPairName (this.extend (request, params));
          return this.parseOrderBook (response, undefined, 'buy', 'sell', 'price', 'amount');
      }
  
      parseBidsAsks (bidasks, priceKey = 0, amountKey = 1) {
          const result = [];
          for (let i = 0; i < bidasks.length; i++) {
              const bidask = bidasks[i];
              if (bidask) {
                  result.push (this.parseBidAsk (bidask, priceKey, amountKey));
              }
          }
          return result;
      }
  
      parseTrade (trade, market = undefined) {
          let symbol = undefined;
          if (market === undefined) {
              market = this.safeValue (this.marketsById, trade['pair']);
          }
          if (market !== undefined) {
              symbol = market['symbol'];
          }
          const timestamp = this.safeTimestamp (trade, 'timestamp');
          const price = this.safeFloat (trade, 'price');
          const amount = this.safeFloat (trade, 'amount');
          let cost = undefined;
          if (price !== undefined) {
              if (amount !== undefined) {
                  cost = parseFloat (this.costToPrecision (symbol, price * amount));
              }
          }
          const id = this.safeString2 (trade, 'id', 'tid');
          const side = this.safeString2 (trade, 'my_side', 'side');
          const orderId = this.safeString (trade, 'o_id');
          return {
              'id': id,
              'info': trade,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'symbol': symbol,
              'order': orderId,
              'type': 'limit',
              'side': side,
              'takerOrMaker': undefined,
              'price': price,
              'amount': amount,
              'cost': cost,
              'fee': undefined,
          };
      }
  
      async fetchTrades (symbol, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          let market = undefined;
          const request = {};
          if (symbol !== undefined) {
              market = this.market (symbol);
              request['pair'] = market['id'];
          }
          if (limit !== undefined) {
              request['limit'] = limit;
          }
          const trades = await this.publicGetExchanges (this.extend (request, params));
          return this.parseTrades (trades, market, since, limit);
      }
  
      parseOHLCV (ohlcv, market = undefined, timeframe = '5m', since = undefined, limit = undefined) {
          //
          //     {
          //         "time":1591296000,
          //         "open":0.024746,
          //         "close":0.024728,
          //         "low":0.024728,
          //         "high":0.024753,
          //         "volume":16.624
          //     }
          //
          return [
              this.safeTimestamp (ohlcv, 'time'),
              this.safeFloat (ohlcv, 'open'),
              this.safeFloat (ohlcv, 'high'),
              this.safeFloat (ohlcv, 'low'),
              this.safeFloat (ohlcv, 'close'),
              this.safeFloat (ohlcv, 'volume'),
          ];
      }
  
      async fetchOHLCV (symbol, timeframe = '5m', since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'pair': market['id'],
              'type': this.timeframes[timeframe],
          };
          if (limit !== undefined) {
              request['limit'] = limit;
          }
          if (since !== undefined) {
              request['since'] = parseInt (since / 1000);
          }
          const response = await this.publicGetChartsPairTypeChart (this.extend (request, params));
          //
          //     [
          //         {"time":1591296000,"open":0.024746,"close":0.024728,"low":0.024728,"high":0.024753,"volume":16.624},
          //         {"time":1591295700,"open":0.024718,"close":0.02475,"low":0.024711,"high":0.02475,"volume":31.645},
          //         {"time":1591295400,"open":0.024721,"close":0.024717,"low":0.024711,"high":0.02473,"volume":65.071}
          //     ]
          //
          return this.parseOHLCVs (response, market, timeframe, since, limit);
      }
  
      async fetchBalance (params = {}) {
          await this.loadMarkets ();
          const response = await this.privateGetWallets (params);
          const result = { 'info': response };
          for (let i = 0; i < response.length; i++) {
              const balance = response[i];
              const currencyId = this.safeString (balance, 'currency');
              const code = this.safeCurrencyCode (currencyId);
              const account = this.account ();
              account['used'] = this.safeFloat (balance, 'reserve');
              account['total'] = this.safeFloat (balance, 'balance');
              result[code] = account;
          }
          return this.parseBalance (result);
      }
  
      parseOrderStatus (status) {
          const statuses = {
              '1': 'open',
              '2': 'canceled',
              '3': 'closed',
          };
          return this.safeString (statuses, status, status);
      }
  
      parseOrder (order, market = undefined) {
          let symbol = undefined;
          if (market === undefined) {
              market = this.safeValue (this.marketsById, order['pair']);
          }
          if (market !== undefined) {
              symbol = market['symbol'];
          }
          const timestamp = this.safeTimestamp (order, 'date');
          const price = this.safeFloat (order, 'price');
          const amount = this.safeFloat (order, 'amount');
          const status = this.parseOrderStatus (this.safeString (order, 'status'));
          const id = this.safeString2 (order, 'oid', 'id');
          let trades = this.safeValue (order, 'trades', []);
          trades = this.parseTrades (trades, market);
          const side = this.safeString2 (order, 'my_side', 'type');
          let filled = undefined;
          const numTrades = trades.length;
          if (numTrades > 0) {
              filled = 0.0;
              for (let i = 0; i < numTrades; i++) {
                  filled = this.sum (filled, trades[i]['amount']);
              }
          }
          let remaining = undefined;
          if ((amount !== undefined) && (amount > 0) && (filled !== undefined)) {
              remaining = Math.max (0, amount - filled);
          }
          return {
              'id': id,
              'clientOrderId': undefined,
              'datetime': this.iso8601 (timestamp),
              'timestamp': timestamp,
              'status': status,
              'symbol': symbol,
              'type': 'limit',
              'side': side,
              'price': price,
              'cost': undefined,
              'amount': amount,
              'filled': filled,
              'remaining': remaining,
              'trades': trades,
              'fee': undefined,
              'info': order,
              'lastTradeTimestamp': undefined,
              'average': undefined,
          };
      }
  
      async createOrder (symbol, type, side, amount, price = undefined, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'pair': market['id'],
              'type': side,
              'amount': amount,
              'price': this.priceToPrecision (symbol, price),
          };
          const response = await this.privatePostOrder (this.extend (request, params));
          if (!response['success']) {
              throw new InvalidOrder (this.id + ' ' + this.json (response));
          }
          const order = this.parseOrder (response, market);
          amount = (order['amount'] > 0) ? order['amount'] : amount;
          return this.extend (order, {
              'amount': amount,
          });
      }
  
      async cancelOrder (id, symbol = undefined, params = {}) {
          const request = {
              'order': id,
          };
          const response = await this.privatePostOrderCancel (this.extend (request, params));
          return response;
      }
  
      async fetchOrder (id, symbol = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {
              'id': id,
          };
          const order = await this.privateGetOrderId (this.extend (request, params));
          return this.parseOrder (order);
      }
  
      async fetchOrders (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {};
          let market = undefined;
          if (symbol !== undefined) {
              market = this.market (symbol);
              request['pair'] = market['id'];
          }
          if (limit !== undefined) {
              request['limit'] = limit;
          }
          const orders = await this.privateGetOrdersOwn (this.extend (request, params));
          return this.parseOrders (orders, market, since, limit);
      }
  
      async fetchOpenOrders (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          const request = {
              'status': '1',
          };
          return await this.fetchOrders (symbol, since, limit, this.extend (request, params));
      }
  
      async fetchClosedOrders (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          const request = {
              'status': '3',
          };
          return await this.fetchOrders (symbol, since, limit, this.extend (request, params));
      }
  
      async fetchMyTrades (symbol = undefined, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {};
          if (symbol !== undefined) {
              const market = this.market (symbol);
              request['pair'] = market['id'];
          }
          if (limit !== undefined) {
              request['limit'] = limit;
          }
          const trades = await this.privateGetExchangesOwn (this.extend (request, params));
          return this.parseTrades (trades, undefined, since, limit);
      }
  
      nonce () {
          return this.milliseconds ();
      }
  
      sign (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
          const query = this.urlencode (this.keysort (this.omit (params, this.extractParams (path))));
          let url = this.urls['api'] + '/';
          if (path !== 'charts/{pair}/{type}/chart/') {
              url += 'v1/';
          }
          url += this.implodeParams (path, params);
          headers = { 'Accept': 'application/json' };
          if (api === 'public') {
              if (query.length) {
                  url += '?' + query;
              }
          } else {
              this.checkRequiredCredentials ();
              let payload = this.apiKey;
              if (method === 'POST') {
                  headers['Content-Type'] = 'application/x-www-form-urlencoded';
                  body = query;
                  payload += body;
              } else if (query.length) {
                  url += '?' + query;
              }
              headers['X-KEY'] = this.apiKey;
              headers['X-SIGN'] = this.hmac (this.encode (payload), this.encode (this.secret));
              headers['X-NONCE'] = this.nonce ().toString ();
          }
          return { 'url': url, 'method': method, 'body': body, 'headers': headers };
      }
  
      handleErrors (code, reason, url, method, headers, body, response, requestHeaders, requestBody) {
          if (response === undefined) {
              return; // fallback to default error handler
          }
          //
          //     {"date":1570599531.4814300537,"error":"Out of balance -9.99243661 BTC"}
          //
          const error = this.safeString (response, 'error');
          const feedback = this.id + ' ' + body;
          if (error !== undefined) {
              this.throwExactlyMatchedException (this.exceptions['exact'], error, feedback);
              this.throwBroadlyMatchedException (this.exceptions['broad'], error, feedback);
          }
          if (code === 401 || code === 403) {
              throw new AuthenticationError (feedback);
          } else if (code === 429) {
              throw new DDoSProtection (feedback);
          }
          if (code < 400) {
              return;
          }
          throw new ExchangeError (feedback);
      }
  };
  