diff --git a/help.go b/help.go
index d1d42db..bb3f074 100644
--- a/help.go
+++ b/help.go
@@ -252,10 +252,7 @@ func WechatCheckSign(appSecret string, paramsMap gin.H) bool {
 		}
 	}
 	getSign := WechatGetSign(appSecret, noSignMap)
-	if getSign != paramsMap["sign"] {
-		return false
-	}
-	return true
+	return getSign == paramsMap["sign"]
 }
 
 func walk(nodes []XMLNode, f func(XMLNode) bool) {
@@ -516,7 +513,7 @@ func ModelRowToInterface(m map[string]string, intCols []string, floatCols []stri
 			}
 			o[k] = vInt
 		} else if IsStringInSlice(floatCols, k) {
-			vFloat, err := strconv.ParseFloat(v, 10)
+			vFloat, err := strconv.ParseFloat(v, 64)
 			if err != nil {
 				return nil, err
 			}
diff --git a/wxpayv3.go b/wxpayv3.go
index ed90fc9..9f54513 100644
--- a/wxpayv3.go
+++ b/wxpayv3.go
@@ -326,6 +326,9 @@ func WxPayV3GetPrepay(keySerial string, key *rsa.PrivateKey, appID, mchID, openI
 		PrepayID string `json:"prepay_id"`
 	}
 	err = jsoniter.Unmarshal(body, &prepayResp)
+	if err != nil {
+		return nil, "", err
+	}
 	if len(prepayResp.PrepayID) == 0 {
 		return nil, "", fmt.Errorf("get prepay id err: %s", body)
 	}