super(exchangeSpecification);
this.bitfinex = RestProxyFactory.createProxy(type, exchangeSpecification.getSslUri());
this.apiKey = exchangeSpecification.getApiKey();
this.signatureCreator = BitfinexHmacPostBodyDigest.createInstance(exchangeSpecification.getSecretKey());
this.payloadCreator = new BitfinexPayloadDigest();
this.currencyPairs = new HashSet<CurrencyPair>();
}