From ba293a3ff9f62ed4ed504422f1c7d03231d5f8b8 Mon Sep 17 00:00:00 2001
From: Roman Khimov <roman@nspcc.ru>
Date: Thu, 29 Apr 2021 17:02:15 +0300
Subject: [PATCH] connections: refuse to build zero-length pool

Prevent starting a gateway with no nodes configured.
---
 connections/pool.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/connections/pool.go b/connections/pool.go
index f8b8f57..8e1db20 100644
--- a/connections/pool.go
+++ b/connections/pool.go
@@ -35,6 +35,9 @@ func (pb *PoolBuilder) AddNode(address string, weight float64) *PoolBuilder {
 }
 
 func (pb *PoolBuilder) Build(ctx context.Context, options *PoolBuilderOptions) (Pool, error) {
+	if len(pb.addresses) == 0 {
+		return nil, errors.New("no NeoFS peers configured")
+	}
 	totalWeight := 0.0
 	for _, w := range pb.weights {
 		totalWeight += w