From 45976a4111eedbfbb8c3cf1e0ca21a27972be03a Mon Sep 17 00:00:00 2001
From: Evgeniy Stratonikov <evgeniy@nspcc.ru>
Date: Mon, 27 Sep 2021 15:37:29 +0300
Subject: [PATCH] rpc/response: beautify error message

If `Error.Cause` is nil, omit ugly `%s!<nil>`.

Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
---
 pkg/rpc/response/errors.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkg/rpc/response/errors.go b/pkg/rpc/response/errors.go
index e19df1166..de0bf4057 100644
--- a/pkg/rpc/response/errors.go
+++ b/pkg/rpc/response/errors.go
@@ -90,6 +90,9 @@ func NewSubmitError(code int64, message string) *Error {
 
 // Error implements the error interface.
 func (e *Error) Error() string {
+	if e.Cause == nil {
+		return fmt.Sprintf("%s (%d) - %s", e.Message, e.Code, e.Data)
+	}
 	return fmt.Sprintf("%s (%d) - %s - %s", e.Message, e.Code, e.Data, e.Cause)
 }