diff --git a/logger.go b/logger.go
new file mode 100644
index 0000000..8c94f9a
--- /dev/null
+++ b/logger.go
@@ -0,0 +1,10 @@
+package qrpc
+
+type logger interface {
+	Info(msg ...interface{})
+	Error(msg ...interface{})
+	Debug(msg ...interface{})
+}
+
+// Logger is exported logger interface
+var Logger logger
diff --git a/qrpc.go b/qrpc.go
index a327b37..821f26f 100644
--- a/qrpc.go
+++ b/qrpc.go
@@ -11,7 +11,7 @@ const (
 	StreamFlag FrameFlag = 1 << iota
 	// StreamEndFlag denotes the end of a stream
 	StreamEndFlag
-	// StreamRstFlag is sent to request cancellation of a stream or to indicate that an error condition has occurred (TODO)
+	// StreamRstFlag is sent to request cancellation of a stream or to indicate that an error condition has occurred
 	StreamRstFlag
 	// NBFlag means it should be handled nonblockingly, it's implied for streamed frames
 	NBFlag