From 0762d6c249d31ab9c72ab535c5401391bb7e06ab Mon Sep 17 00:00:00 2001
From: Mongo <airy@live.com>
Date: Tue, 31 Oct 2017 16:51:20 +0800
Subject: [PATCH] fix payment params error

---
 pay/pay.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pay/pay.go b/pay/pay.go
index 4527e93..720bc73 100644
--- a/pay/pay.go
+++ b/pay/pay.go
@@ -90,7 +90,7 @@ func (pcf *Pay) PrePayId(p *PayParams) (prePayID string, err error) {
 	tradeType := "JSAPI"
 	template := "appid=%s&body=%s&mch_id=%s&nonce_str=%s&notify_url=%s&out_trade_no=%s&spbill_create_ip=%s&total_fee=%s&trade_type=%s"
 	str := fmt.Sprintf(template, pcf.AppID, p.Body, pcf.PayMchID, nonceStr, pcf.PayNotifyURL, p.OutTradeNo, p.CreateIP, p.TotalFee, tradeType)
-	str := str + "&key=" + pcf.PayKey
+	str = str + "&key=" + pcf.PayKey
 	sum := md5.Sum([]byte(str))
 	signature := string(sum[:])
 	sign := strings.ToUpper(signature)