text: 'use strict';
  
  //  ---------------------------------------------------------------------------
  
  const Exchange = require ('./base/Exchange');
  const { ExchangeError } = require ('./base/errors');
  
  //  ---------------------------------------------------------------------------
  
  module.exports = class paymium extends Exchange {
      describe () {
          return this.deepExtend (super.describe (), {
              'id': 'paymium',
              'name': 'Paymium',
              'countries': [ 'FR', 'EU' ],
              'rateLimit': 2000,
              'version': 'v1',
              'has': {
                  'CORS': true,
              },
              'urls': {
                  'logo': 'https://user-images.githubusercontent.com/1294454/27790564-a945a9d4-5ff9-11e7-9d2d-b635763f2f24.jpg',
                  'api': 'https://paymium.com/api',
                  'www': 'https://www.paymium.com',
                  'doc': [
                      'https://github.com/Paymium/api-documentation',
                      'https://www.paymium.com/page/developers',
                  ],
              },
              'api': {
                  'public': {
                      'get': [
                          'countries',
                          'data/{id}/ticker',
                          'data/{id}/trades',
                          'data/{id}/depth',
                          'bitcoin_charts/{id}/trades',
                          'bitcoin_charts/{id}/depth',
                      ],
                  },
                  'private': {
                      'get': [
                          'merchant/get_payment/{UUID}',
                          'user',
                          'user/addresses',
                          'user/addresses/{btc_address}',
                          'user/orders',
                          'user/orders/{UUID}',
                          'user/price_alerts',
                      ],
                      'post': [
                          'user/orders',
                          'user/addresses',
                          'user/payment_requests',
                          'user/price_alerts',
                          'merchant/create_payment',
                      ],
                      'delete': [
                          'user/orders/{UUID}/cancel',
                          'user/price_alerts/{id}',
                      ],
                  },
              },
              'markets': {
                  'BTC/EUR': { 'id': 'eur', 'symbol': 'BTC/EUR', 'base': 'BTC', 'quote': 'EUR' },
              },
              'fees': {
                  'trading': {
                      'maker': 0.0059,
                      'taker': 0.0059,
                  },
              },
          });
      }
  
      async fetchBalance (params = {}) {
          let balances = await this.privateGetUser ();
          let result = { 'info': balances };
          let currencies = Object.keys (this.currencies);
          for (let i = 0; i < currencies.length; i++) {
              let currency = currencies[i];
              let lowercase = currency.toLowerCase ();
              let account = this.account ();
              let balance = 'balance_' + lowercase;
              let locked = 'locked_' + lowercase;
              if (balance in balances)
                  account['free'] = balances[balance];
              if (locked in balances)
                  account['used'] = balances[locked];
              account['total'] = this.sum (account['free'], account['used']);
              result[currency] = account;
          }
          return this.parseBalance (result);
      }
  
      async fetchOrderBook (symbol, limit = undefined, params = {}) {
          let orderbook = await this.publicGetDataIdDepth (this.extend ({
              'id': this.marketId (symbol),
          }, params));
          let result = this.parseOrderBook (orderbook, undefined, 'bids', 'asks', 'price', 'amount');
          result['bids'] = this.sortBy (result['bids'], 0, true);
          return result;
      }
  
      async fetchTicker (symbol, params = {}) {
          let ticker = await this.publicGetDataIdTicker (this.extend ({
              'id': this.marketId (symbol),
          }, params));
          let timestamp = ticker['at'] * 1000;
          let vwap = parseFloat (ticker['vwap']);
          let baseVolume = parseFloat (ticker['volume']);
          let quoteVolume = baseVolume * vwap;
          return {
              'symbol': symbol,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'high': this.safeFloat (ticker, 'high'),
              'low': this.safeFloat (ticker, 'low'),
              'bid': this.safeFloat (ticker, 'bid'),
              'ask': this.safeFloat (ticker, 'ask'),
              'vwap': vwap,
              'open': this.safeFloat (ticker, 'open'),
              'close': undefined,
              'first': undefined,
              'last': this.safeFloat (ticker, 'price'),
              'change': undefined,
              'percentage': this.safeFloat (ticker, 'variation'),
              'average': undefined,
              'baseVolume': baseVolume,
              'quoteVolume': quoteVolume,
              'info': ticker,
          };
      }
  
      parseTrade (trade, market) {
          let timestamp = parseInt (trade['created_at_int']) * 1000;
          let volume = 'traded_' + market['base'].toLowerCase ();
          return {
              'info': trade,
              'id': trade['uuid'],
              'order': undefined,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'symbol': market['symbol'],
              'type': undefined,
              'side': trade['side'],
              'price': trade['price'],
              'amount': trade[volume],
          };
      }
  
      async fetchTrades (symbol, since = undefined, limit = undefined, params = {}) {
          let market = this.market (symbol);
          let response = await this.publicGetDataIdTrades (this.extend ({
              'id': market['id'],
          }, params));
          return this.parseTrades (response, market, since, limit);
      }
  
      async createOrder (market, type, side, amount, price = undefined, params = {}) {
          let order = {
              'type': this.capitalize (type) + 'Order',
              'currency': this.marketId (market),
              'direction': side,
              'amount': amount,
          };
          if (type === 'market')
              order['price'] = price;
          let response = await this.privatePostUserOrders (this.extend (order, params));
          return {
              'info': response,
              'id': response['uuid'],
          };
      }
  
      async cancelOrder (id, symbol = undefined, params = {}) {
          return await this.privatePostCancelOrder (this.extend ({
              'orderNumber': id,
          }, params));
      }
  
      sign (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
          let url = this.urls['api'] + '/' + this.version + '/' + this.implodeParams (path, params);
          let query = this.omit (params, this.extractParams (path));
          if (api === 'public') {
              if (Object.keys (query).length)
                  url += '?' + this.urlencode (query);
          } else {
              this.checkRequiredCredentials ();
              body = this.json (params);
              let nonce = this.nonce ().toString ();
              let auth = nonce + url + body;
              headers = {
                  'Api-Key': this.apiKey,
                  'Api-Signature': this.hmac (this.encode (auth), this.encode (this.secret)),
                  'Api-Nonce': nonce,
                  'Content-Type': 'application/json',
              };
          }
          return { 'url': url, 'method': method, 'body': body, 'headers': headers };
      }
  
      async request (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
          let response = await this.fetch2 (path, api, method, params, headers, body);
          if ('errors' in response)
              throw new ExchangeError (this.id + ' ' + this.json (response));
          return response;
      }
  };
  