fix: Node.close() should check if channel has been initialized

client_test.go

@@ -49,6 +49,24 @@ func TestClientFromConfig(t *testing.T) {
 	assert.Nil(t, client.operator)
 }
 
+func TestClientSetNetwork(t *testing.T) {
+	client := ClientForPreviewnet()
+
+	assert.NotNil(t, client)
+	assert.Equal(t, 4, len(client.network.network))
+	assert.Nil(t, client.operator)
+
+	network := make(map[string]AccountID)
+	network["35.237.200.180:50211"] = AccountID{0, 0, 3}
+	network["35.186.191.247:50211"] = AccountID{0, 0, 4}
+	network["35.192.2.25:50211"] = AccountID{0, 0, 5}
+	network["35.199.161.108:50211"] = AccountID{0, 0, 6}
+	network["35.203.82.240:50211"] = AccountID{0, 0, 7}
+
+	client.SetNetwork(network)
+	assert.Equal(t, 5, len(client.network.network))
+}
+
 func TestClientFromConfigWithOperator(t *testing.T) {
 	client, err := ClientFromConfig([]byte(testClientJSONWithOperator))
 	assert.NoError(t, err)

node.go

@@ -81,7 +81,11 @@ func (node *node) getChannel() (*channel, error) {
 }
 
 func (node *node) close() error {
-	return node.channel.client.Close()
+	if node.channel != nil {
+		return node.channel.client.Close()
+	}
+
+	return nil
 }
 
 func (nodes nodes) Len() int {