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',
                  'fees': 'https://www.paymium.com/page/help/fees',
                  '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', 'baseId': 'btc', 'quoteId': 'eur' },
              },
              'fees': {
                  'trading': {
                      'maker': 0.002,
                      'taker': 0.002,
                  },
              },
          });
      }
  
      async fetchBalance (params = {}) {
          await this.loadMarkets ();
          const response = await this.privateGetUser (params);
          const result = { 'info': response };
          const currencies = Object.keys (this.currencies);
          for (let i = 0; i < currencies.length; i++) {
              const code = currencies[i];
              const currencyId = this.currencyId (code);
              const free = 'balance_' + currencyId;
              if (free in response) {
                  const account = this.account ();
                  const used = 'locked_' + currencyId;
                  account['free'] = this.safeFloat (response, free);
                  account['used'] = this.safeFloat (response, used);
                  result[code] = account;
              }
          }
          return this.parseBalance (result);
      }
  
      async fetchOrderBook (symbol, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {
              'id': this.marketId (symbol),
          };
          const response = await this.publicGetDataIdDepth (this.extend (request, params));
          return this.parseOrderBook (response, undefined, 'bids', 'asks', 'price', 'amount');
      }
  
      async fetchTicker (symbol, params = {}) {
          const request = {
              'id': this.marketId (symbol),
          };
          const ticker = await this.publicGetDataIdTicker (this.extend (request, params));
          const timestamp = this.safeTimestamp (ticker, 'at');
          const vwap = this.safeFloat (ticker, 'vwap');
          const baseVolume = this.safeFloat (ticker, 'volume');
          let quoteVolume = undefined;
          if (baseVolume !== undefined && vwap !== undefined) {
              quoteVolume = baseVolume * vwap;
          }
          const last = this.safeFloat (ticker, 'price');
          return {
              'symbol': symbol,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'high': this.safeFloat (ticker, 'high'),
              'low': this.safeFloat (ticker, 'low'),
              'bid': this.safeFloat (ticker, 'bid'),
              'bidVolume': undefined,
              'ask': this.safeFloat (ticker, 'ask'),
              'askVolume': undefined,
              'vwap': vwap,
              'open': this.safeFloat (ticker, 'open'),
              'close': last,
              'last': last,
              'previousClose': undefined,
              'change': undefined,
              'percentage': this.safeFloat (ticker, 'variation'),
              'average': undefined,
              'baseVolume': baseVolume,
              'quoteVolume': quoteVolume,
              'info': ticker,
          };
      }
  
      parseTrade (trade, market) {
          const timestamp = this.safeTimestamp (trade, 'created_at_int');
          const id = this.safeString (trade, 'uuid');
          let symbol = undefined;
          if (market !== undefined) {
              symbol = market['symbol'];
          }
          const side = this.safeString (trade, 'side');
          const price = this.safeFloat (trade, 'price');
          const amountField = 'traded_' + market['base'].toLowerCase ();
          const amount = this.safeFloat (trade, amountField);
          let cost = undefined;
          if (price !== undefined) {
              if (amount !== undefined) {
                  cost = amount * price;
              }
          }
          return {
              'info': trade,
              'id': id,
              'order': undefined,
              'timestamp': timestamp,
              'datetime': this.iso8601 (timestamp),
              'symbol': symbol,
              'type': undefined,
              'side': side,
              'takerOrMaker': undefined,
              'price': price,
              'amount': amount,
              'cost': cost,
              'fee': undefined,
          };
      }
  
      async fetchTrades (symbol, since = undefined, limit = undefined, params = {}) {
          await this.loadMarkets ();
          const market = this.market (symbol);
          const request = {
              'id': market['id'],
          };
          const response = await this.publicGetDataIdTrades (this.extend (request, params));
          return this.parseTrades (response, market, since, limit);
      }
  
      async createOrder (symbol, type, side, amount, price = undefined, params = {}) {
          await this.loadMarkets ();
          const request = {
              'type': this.capitalize (type) + 'Order',
              'currency': this.marketId (symbol),
              'direction': side,
              'amount': amount,
          };
          if (type !== 'market') {
              request['price'] = price;
          }
          const response = await this.privatePostUserOrders (this.extend (request, params));
          return {
              'info': response,
              'id': response['uuid'],
          };
      }
  
      async cancelOrder (id, symbol = undefined, params = {}) {
          const request = {
              'uuid': id,
          };
          return await this.privateDeleteUserOrdersUuidCancel (this.extend (request, params));
      }
  
      sign (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
          let url = this.urls['api'] + '/' + this.version + '/' + 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 auth = nonce + url;
              headers = {
                  'Api-Key': this.apiKey,
                  'Api-Nonce': nonce,
              };
              if (method === 'POST') {
                  if (Object.keys (query).length) {
                      body = this.json (query);
                      auth += body;
                      headers['Content-Type'] = 'application/json';
                  }
              } else {
                  if (Object.keys (query).length) {
                      const queryString = this.urlencode (query);
                      auth += queryString;
                      url += '?' + queryString;
                  }
              }
              headers['Api-Signature'] = this.hmac (this.encode (auth), this.encode (this.secret));
          }
          return { 'url': url, 'method': method, 'body': body, 'headers': headers };
      }
  
      async request (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
          const response = await this.fetch2 (path, api, method, params, headers, body);
          if ('errors' in response) {
              throw new ExchangeError (this.id + ' ' + this.json (response));
          }
          return response;
      }
  };
  