Make showing identity change notices configurable

config/bridge.go

@@ -35,6 +35,7 @@ type BridgeConfig struct {
 	DeliveryReceipts      bool `yaml:"delivery_receipts"`
 	PortalMessageBuffer   int  `yaml:"portal_message_buffer"`
 	CallStartNotices      bool `yaml:"call_start_notices"`
+	IdentityChangeNotices bool `yaml:"identity_change_notices"`
 	ReactionNotices       bool `yaml:"reaction_notices"`
 
 	HistorySync struct {

config/upgrade.go

@@ -68,6 +68,7 @@ func (helper *UpgradeHelper) doUpgrade() {
 	helper.Copy(Bool, "bridge", "delivery_receipts")
 	helper.Copy(Int, "bridge", "portal_message_buffer")
 	helper.Copy(Bool, "bridge", "call_start_notices")
+	helper.Copy(Bool, "bridge", "identity_change_notices")
 	helper.Copy(Bool, "bridge", "reaction_notices")
 	helper.Copy(Bool, "bridge", "history_sync", "create_portals")
 	helper.Copy(Int, "bridge", "history_sync", "max_age")

example-config.yaml

@@ -92,6 +92,8 @@ bridge:
     delivery_receipts: false
     # Should incoming calls send a message to the Matrix room?
     call_start_notices: true
+    # Should another user's cryptographic identity changing send a message to Matrix?
+    identity_change_notices: false
     # Should a "reactions not yet supported" warning be sent to the Matrix room when a user reacts to a message?
     reaction_notices: true
 

user.go

@@ -439,7 +439,7 @@ func (user *User) HandleEvent(event interface{}) {
 	case *events.IdentityChange:
 		puppet := user.bridge.GetPuppetByJID(v.JID)
 		portal := user.GetPortalByJID(v.JID)
-		if len(portal.MXID) > 0 {
+		if len(portal.MXID) > 0 && user.bridge.Config.Bridge.IdentityChangeNotices {
 			portal.messages <- PortalMessage{
 				fake: &fakeMessage{
 					Sender:    v.JID,