Add method to fetch available currencies from Poloniex, fix available currency bug in poloniex and update config_example.json

exchanges/poloniex/poloniex.go

@@ -221,6 +221,22 @@ func (p *Poloniex) GetCurrencies() (map[string]PoloniexCurrencies, error) {
 	return resp.Data, common.SendHTTPGetRequest(path, true, p.Verbose, &resp.Data)
 }
 
+// GetExchangeCurrencies returns a list of currencies using the GetTicker API
+// as the GetExchangeCurrencies information doesn't return currency pair information
+func (p *Poloniex) GetExchangeCurrencies() ([]string, error) {
+	response, err := p.GetTicker()
+	if err != nil {
+		return nil, err
+	}
+
+	var currencies []string
+	for x := range response {
+		currencies = append(currencies, x)
+	}
+
+	return currencies, nil
+}
+
 // GetLoanOrders returns the list of loan offers and demands for a given
 // currency, specified by the "currency" GET parameter.
 func (p *Poloniex) GetLoanOrders(currency string) (PoloniexLoanOrders, error) {

exchanges/poloniex/poloniex_wrapper.go

@@ -26,6 +26,22 @@ func (p *Poloniex) Run() {
 	if p.Websocket {
 		go p.WebsocketClient()
 	}
+
+	exchangeCurrencies, err := p.GetExchangeCurrencies()
+	if err != nil {
+		log.Printf("%s Failed to get available symbols.\n", p.GetName())
+	} else {
+		forceUpdate := false
+		if common.DataContains(p.AvailablePairs, "BTC_USDT") {
+			log.Printf("%s contains invalid pair, forcing upgrade of available currencies.\n",
+				p.GetName())
+			forceUpdate = true
+		}
+		err = p.UpdateAvailableCurrencies(exchangeCurrencies, forceUpdate)
+		if err != nil {
+			log.Printf("%s Failed to update available currencies %s.\n", p.GetName(), err)
+		}
+	}
 }
 
 // UpdateTicker updates and returns the ticker for a currency pair