From 2db83caf29630b5a65604d1b50a1df946bf92abd Mon Sep 17 00:00:00 2001
From: Evgeniy Kulikov <kim@nspcc.ru>
Date: Tue, 3 Mar 2020 13:36:20 +0300
Subject: [PATCH] used logger custom interface instead of grpclog.LoggerV2

---
 logger.go | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/logger.go b/logger.go
index 21588e1..3bb969e 100644
--- a/logger.go
+++ b/logger.go
@@ -10,10 +10,17 @@ import (
 	"go.uber.org/zap/zapcore"
 )
 
-type zapLogger struct {
-	zapcore.Core
-	log *zap.SugaredLogger
-}
+type (
+	zapLogger struct {
+		zapcore.Core
+		log *zap.SugaredLogger
+	}
+
+	logger interface {
+		grpclog.LoggerV2
+		Println(v ...interface{})
+	}
+)
 
 const (
 	formatJSON    = "json"
@@ -23,7 +30,7 @@ const (
 	defaultSamplingThereafter = 100
 )
 
-func gRPCLogger(l *zap.Logger) grpclog.LoggerV2 {
+func gRPCLogger(l *zap.Logger) logger {
 	log := l.WithOptions(
 		// skip gRPCLog + zapLogger in caller
 		zap.AddCallerSkip(2))