From 9996b3be01b5c0ab2ce4b05f4a74d42aada192d1 Mon Sep 17 00:00:00 2001
From: Pavel Karpy <carpawell@nspcc.ru>
Date: Tue, 26 Apr 2022 18:01:40 +0300
Subject: [PATCH] [#240] container: Support disabling homomorphic hashing

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
---
 container/network.go      | 20 ++++++++++++++++++++
 container/network_test.go | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)
 create mode 100644 container/network.go
 create mode 100644 container/network_test.go

diff --git a/container/network.go b/container/network.go
new file mode 100644
index 0000000..68d1b32
--- /dev/null
+++ b/container/network.go
@@ -0,0 +1,20 @@
+package container
+
+import (
+	"github.com/nspcc-dev/neofs-sdk-go/netmap"
+)
+
+// ApplyNetworkConfig applies network configuration to the
+// container. Changes the container if it does not satisfy
+// network configuration.
+func ApplyNetworkConfig(cnr *Container, cfg netmap.NetworkInfo) {
+	if cfg.HomomorphicHashingDisabled() {
+		DisableHomomorphicHashing(cnr)
+	}
+}
+
+// AssertNetworkConfig checks if a container matches passed
+// network configuration.
+func AssertNetworkConfig(cnr Container, cfg netmap.NetworkInfo) bool {
+	return IsHomomorphicHashingDisabled(cnr) == cfg.HomomorphicHashingDisabled()
+}
diff --git a/container/network_test.go b/container/network_test.go
new file mode 100644
index 0000000..6391851
--- /dev/null
+++ b/container/network_test.go
@@ -0,0 +1,33 @@
+package container_test
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neofs-sdk-go/container"
+	containertest "github.com/nspcc-dev/neofs-sdk-go/container/test"
+	netmaptest "github.com/nspcc-dev/neofs-sdk-go/netmap/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestContainer_NetworkConfig(t *testing.T) {
+	c := containertest.Container()
+	nc := netmaptest.NetworkInfo()
+
+	t.Run("default", func(t *testing.T) {
+		require.False(t, container.IsHomomorphicHashingDisabled(c))
+
+		res := container.AssertNetworkConfig(c, nc)
+
+		require.True(t, res)
+	})
+
+	nc.DisableHomomorphicHashing()
+
+	t.Run("apply", func(t *testing.T) {
+		require.False(t, container.IsHomomorphicHashingDisabled(c))
+
+		container.ApplyNetworkConfig(&c, nc)
+
+		require.True(t, container.IsHomomorphicHashingDisabled(c))
+	})
+}