Skip to content

feat: support for room v11 #858

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
MadLittleMods merged 4 commits into from
May 7, 2026
Merged

feat: support for room v11 #858

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
1feb361
feat: support for room v11
FrenchGithubUser Apr 1, 2026
177f831
apply more suggestions
FrenchGithubUser Apr 20, 2026
4699ff5
chore: pull latest changes from gomatrixserverlib
FrenchGithubUser May 6, 2026
a567eb1
Update tests/federation_room_get_missing_events_test.go
FrenchGithubUser May 7, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
23 changes: 14 additions & 9 deletions federation/server_room.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -333,15 +333,20 @@ func InitialRoomEvents(roomVer gomatrixserverlib.RoomVersion, creator string) []
Type: "m.room.create",
StateKey: b.Ptr(""),
Sender: creator,
Content: map[string]interface{}{
"creator": creator,
"room_version": roomVer,
// We have to add randomness to the create event, else if you create 2x v12+ rooms in the same millisecond
// they will get the same room ID, clobbering internal data structures and causing extremely confusing
// behaviour. By adding this entropy, we ensure that even if rooms are created in the same millisecond, their
// hashes will not be the same.
"complement_entropy": util.RandomString(18),
},
Content: func() map[string]interface{} {
content := map[string]interface{}{
"room_version": roomVer,
// We have to add randomness to the create event, else if you create 2x v12+ rooms in the same millisecond
// they will get the same room ID, clobbering internal data structures and causing extremely confusing
// behaviour. By adding this entropy, we ensure that even if rooms are created in the same millisecond, their
// hashes will not be the same.
"complement_entropy": util.RandomString(18),
}
if gomatrixserverlib.MustGetRoomVersion(gomatrixserverlib.RoomVersion(roomVer)).CreatorInCreateEvent() {
Comment thread
MadLittleMods marked this conversation as resolved.
content["creator"] = creator
}
return content
}(),
},
{
Type: "m.room.member",
Expand Down
2 changes: 1 addition & 1 deletion go.mod
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ require (
github.com/docker/go-connections v0.4.0
github.com/gorilla/mux v1.8.0
github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530
github.com/matrix-org/gomatrixserverlib v0.0.0-20250813150445-9f5070a65744
github.com/matrix-org/gomatrixserverlib v0.0.0-20260506075950-c9c468727353
github.com/matrix-org/util v0.0.0-20221111132719-399730281e66
github.com/sirupsen/logrus v1.9.3
github.com/tidwall/gjson v1.18.0
Expand Down
2 changes: 2 additions & 0 deletions go.sum
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -75,6 +75,8 @@ github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530 h1:kHKxCOLcHH8
github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530/go.mod h1:/gBX06Kw0exX1HrwmoBibFA98yBk/jxKpGVeyQbff+s=
github.com/matrix-org/gomatrixserverlib v0.0.0-20250813150445-9f5070a65744 h1:5GvC2FD9O/PhuyY95iJQdNYHbDioEhMWdeMP9maDUL8=
github.com/matrix-org/gomatrixserverlib v0.0.0-20250813150445-9f5070a65744/go.mod h1:b6KVfDjXjA5Q7vhpOaMqIhFYvu5BuFVZixlNeTV/CLc=
github.com/matrix-org/gomatrixserverlib v0.0.0-20260506075950-c9c468727353 h1:BdGU/8sF4ZaqGhfYN+eFEzc/whU4LpKvEDdM6i0Oqqs=
github.com/matrix-org/gomatrixserverlib v0.0.0-20260506075950-c9c468727353/go.mod h1:b6KVfDjXjA5Q7vhpOaMqIhFYvu5BuFVZixlNeTV/CLc=
github.com/matrix-org/util v0.0.0-20221111132719-399730281e66 h1:6z4KxomXSIGWqhHcfzExgkH3Z3UkIXry4ibJS4Aqz2Y=
github.com/matrix-org/util v0.0.0-20221111132719-399730281e66/go.mod h1:iBI1foelCqA09JJgPV0FYz4qA5dUXYOxMi57FxKBdd4=
github.com/miekg/dns v1.1.66 h1:FeZXOS3VCVsKnEAd+wBkjMC3D2K+ww66Cq3VnCINuJE=
Expand Down
7 changes: 6 additions & 1 deletion tests/csapi/rooms_state_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ import (
"github.com/matrix-org/complement/helpers"
"github.com/matrix-org/complement/match"
"github.com/matrix-org/complement/must"
"github.com/matrix-org/gomatrixserverlib"
)

func TestRoomCreationReportsEventsToMyself(t *testing.T) {
Expand All @@ -26,6 +27,7 @@ func TestRoomCreationReportsEventsToMyself(t *testing.T) {
LocalpartSuffix: "bob",
Password: "bobpassword",
})
defaultVer := alice.GetDefaultRoomVersion(t)
roomID := alice.MustCreateRoom(t, map[string]interface{}{})

t.Run("parallel", func(t *testing.T) {
Expand All @@ -38,7 +40,10 @@ func TestRoomCreationReportsEventsToMyself(t *testing.T) {
return false
}
must.Equal(t, ev.Get("sender").Str, alice.UserID, "wrong sender")
must.Equal(t, ev.Get("content").Get("creator").Str, alice.UserID, "wrong content.creator")
// The creator field was removed in room version 11 (MSC4239).
if gomatrixserverlib.MustGetRoomVersion(defaultVer).CreatorInCreateEvent() {
must.Equal(t, ev.Get("content").Get("creator").Str, alice.UserID, "wrong content.creator")
}
Comment thread
MadLittleMods marked this conversation as resolved.
return true
}))
})
Expand Down
10 changes: 10 additions & 0 deletions tests/federation_room_get_missing_events_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -497,6 +497,16 @@ func TestOutboundFederationEventSizeGetMissingEvents(t *testing.T) {
}).Methods("POST")

ver := alice.GetDefaultRoomVersion(t)
// This test crafts a "bad" event which state_key is 280 bytes but only 70
// codepoints.
//
// Room version 11 in Synapse switched from using codepoints to using
// bytes. Which means the 280-byte state_key would be rejected immediately.
// Use room version 10 in that case so the codepoint-based limit is in effect.
//
if gomatrixserverlib.MustGetRoomVersion(ver).StrictEventByteLimits() {
ver = gomatrixserverlib.RoomVersion("10")
}
Comment thread
MadLittleMods marked this conversation as resolved.
Comment on lines 499 to +509
Copy link
Copy Markdown
Collaborator

@MadLittleMods MadLittleMods Apr 17, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Seems like this test would be better if we just always used room version 10 🤔 . The current setup is only better if we're trying to support homeservers that don't support room version 10 yet (do we care about that?)

Suggested change
ver := alice.GetDefaultRoomVersion(t)
// This test crafts a "bad" event which state_key is 280 bytes but only 70
// codepoints.
//
// Room version 11 in Synapse switched from using codepoints to using
// bytes. Which means the 280-byte state_key would be rejected immediately.
// Use room version 10 in that case so the codepoint-based limit is in effect.
//
// Since upgrading a room (for example from v10 to v11) won't carry the event
// (a new room is created), we don't have to worry about v10 room events in a v11
// room.
//
// So this test is essentially skipped for any default room v11 or higher.
verNum, _ := strconv.Atoi(string(ver))
if verNum >= 11 {
ver = gomatrixserverlib.RoomVersion("10")
}
// This test crafts a "bad" event which state_key is 280 bytes but only 70
// codepoints.
//
// Room version 11 in Synapse switched from using codepoints to using
// bytes. Which means the 280-byte state_key would be rejected immediately.
// Use room version 10 in that case so the codepoint-based limit is in effect.
//
// Since upgrading a room (for example from v10 to v11) won't carry the event
// (a new room is created), we don't have to worry about v10 room events in a v11
// room.
//
// So this test is essentially skipped for any default room v11 or higher.
ver = gomatrixserverlib.RoomVersion("10")

Copy link
Copy Markdown
Contributor Author

@FrenchGithubUser FrenchGithubUser Apr 20, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

yea I thought it's better to be flexible (since it's not a big change in the test code), but I can apply your suggestion if you think it's better

Copy link
Copy Markdown
Collaborator

@MadLittleMods MadLittleMods Apr 20, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Probably simplest to converge on room version 10.

If there is a use case for the alternative, we can go that route but the comment should better explain the intention.

charlie := srv.UserID("charlie")
room := srv.MustMakeRoom(t, ver, federation.InitialRoomEvents(ver, charlie))
roomAlias := srv.MakeAliasMapping("flibble", room.RoomID)
Expand Down
Loading