feat:兑换接口返回值调整

jydocs-back/servers/userDoc.go

@@ -241,6 +241,10 @@ func (userDoc *UserDoc) DocBuy() {
 			}
 			rpc.DocStatistics(userId, docId, rpc.Down)
 		}()
+		if payWay == "会员免费特权" {
+			surplus = surplus - 1
+			use = use + 1
+		}
 		return map[string]interface{}{
 			"status":  0,
 			"surplus": surplus,