From 916b3b0ecab0f6c97efd00353d917dc3c3d2c3c1 Mon Sep 17 00:00:00 2001
From: c9s <yoan@maicoin.com>
Date: Sat, 24 Oct 2020 16:32:54 +0800
Subject: [PATCH] early return if len of trades == 0

---
 pkg/accounting/pnl/avg_cost.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/pkg/accounting/pnl/avg_cost.go b/pkg/accounting/pnl/avg_cost.go
index bc7c51382..764e9624f 100644
--- a/pkg/accounting/pnl/avg_cost.go
+++ b/pkg/accounting/pnl/avg_cost.go
@@ -23,6 +23,17 @@ func (c *AverageCostCalculator) Calculate(symbol string, trades []types.Trade, c
 	var bidFeeUSD = 0.0
 	var feeRate = 0.0015
 
+	if len(trades) == 0 {
+		return &AverageCostPnlReport{
+			Symbol:       symbol,
+			CurrentPrice: currentPrice,
+			NumTrades:    0,
+			BidVolume: bidVolume,
+			AskVolume: askVolume,
+			FeeUSD:           feeUSD,
+		}
+	}
+
 	var currencyFees = map[string]float64{}
 
 	for _, trade := range trades {