Add feature flag for push notifications and bump version

VERSION

@@ -1 +1 @@
-0.56.0
+0.56.1

protocol/common/feature_flags.go

@@ -5,4 +5,7 @@ type FeatureFlags struct {
 	// using datasync, breaking change for non-v1 clients. Public messages
 	// are not impacted
 	Datasync bool
+
+	// PushNotification indicates whether we should be enabling the push notification feature
+	PushNotifications bool
 }

protocol/messenger.go

@@ -1459,7 +1459,7 @@ func (m *Messenger) SendChatMessage(ctx context.Context, message *Message) (*Mes
 
 	id, err := m.dispatchMessage(ctx, &common.RawMessage{
 		LocalChatID:          chat.ID,
-		SendPushNotification: !chat.Public(),
+		SendPushNotification: m.featureFlags.PushNotifications && !chat.Public(),
 		Payload:              encodedMessage,
 		MessageType:          protobuf.ApplicationMetadataMessage_CHAT_MESSAGE,
 		ResendAutomatically:  true,

protocol/messenger_config.go

@@ -116,6 +116,13 @@ func WithDatasync() func(c *config) error {
 	}
 }
 
+func WithPushNotifications() func(c *config) error {
+	return func(c *config) error {
+		c.featureFlags.PushNotifications = true
+		return nil
+	}
+}
+
 func WithEnvelopesMonitorConfig(emc *transport.EnvelopesMonitorConfig) Option {
 	return func(c *config) error {
 		c.envelopesMonitorConfig = emc

protocol/push_notification_test.go

@@ -88,6 +88,7 @@ func (s *MessengerPushNotificationSuite) newMessengerWithKey(shh types.Waku, pri
 		WithMessagesPersistenceEnabled(),
 		WithDatabaseConfig(tmpFile.Name(), ""),
 		WithDatasync(),
+		WithPushNotifications(),
 	}
 	return s.newMessengerWithOptions(shh, privateKey, options)
 }