Kgothatso Ngako a6bb811b03
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fix(subgroups): land the coordinator in the transcript, not on a screen offering another ceremony
Pressing "Start the key ceremony" in the picker opened the ceremony and then
navigated to the shared-key screen -- whose whole job is to *offer* a ceremony to
a room that has none. So the coordinator arrived at a "Start key ceremony" button
seconds after starting one, and pressing it opened a second.

The second one is not a duplicate as far as the protocol is concerned, which is
why nothing refused it. `proposeRitual`'s guard is scoped by purpose, deliberately:
a room has to be able to hold the group's own ceremony and a subgroup's, since a
subgroup whose admins are the whole group runs in the room the group's own ceremony
ran in. A room holding a subgroup's ceremony will therefore take one for *no*
subgroup without complaint -- and then "the room's newest ceremony" is the new
empty one, and the subgroup's is buried under it. That is what happened to 2.0 and
2.1.

**The coordinator goes to the transcript.** The ceremony is already open and its
first line is already in that room; what they need is to watch it and answer the
requests as they arrive, through the same ritual notices every other member uses
-- which since `0b65d702` name their own ceremony and so open the right one. The
shared-key screen has nothing to offer a room that already has a ceremony, and
should not have been the destination.

**And the screen stops offering one.** `canStartRitual` asked only about the
ceremony being *shown*; it now also asks whether the room holds any that has not
failed, which is a different question and the one that matters here.
`DkgRitualUIState.roomHasCeremony` is observed separately for exactly that reason.

**The route's `parentChatRoomId` goes.** Nothing passed it any more, and it was the
shape of two of these bugs: only the member who opened a subgroup could ever fill
it in, so a route that claimed to know the purpose was right for one caller and
silently wrong for everybody else. The purpose is read off
`DkgSession.parentChatRoomId` and nowhere else now, which makes that rule
structural rather than conventional.

One test in `RobustRoomKeyCeremonyTest` pinning the thing that is *not* a bug: a
room holding a subgroup's ceremony still accepts one for another purpose, because
two purposes are two ceremonies -- so the refusal has to live in what the UI
offers, not in the guard.

397 common tests, 718 jvm tests, `m3Audit` meets every budget.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-09 02:03:53 +02:00
2026-07-05 23:21:02 +02:00
2026-07-28 09:10:20 +02:00
2026-03-24 04:47:19 +02:00
2026-03-23 01:41:39 +02:00
2026-03-23 01:41:39 +02:00
2026-03-23 01:41:39 +02:00

This is a Kotlin Multiplatform project targeting Android, iOS, Desktop (JVM).

  • /composeApp is for code that will be shared across your Compose Multiplatform applications. It contains several subfolders:

    • commonMain is for code thats common for all targets.
    • Other folders are for Kotlin code that will be compiled for only the platform indicated in the folder name. For example, if you want to use Apples CoreCrypto for the iOS part of your Kotlin app, the iosMain folder would be the right place for such calls. Similarly, if you want to edit the Desktop (JVM) specific part, the jvmMain folder is the appropriate location.
  • /iosApp contains iOS applications. Even if youre sharing your UI with Compose Multiplatform, you need this entry point for your iOS app. This is also where you should add SwiftUI code for your project.

Build and Run Android Application

To build and run the development version of the Android app, use the run configuration from the run widget in your IDEs toolbar or build it directly from the terminal:

  • on macOS/Linux
    ./gradlew :composeApp:assembleDebug
    
  • on Windows
    .\gradlew.bat :composeApp:assembleDebug
    

Build and Run Desktop (JVM) Application

To build and run the development version of the desktop app, use the run configuration from the run widget in your IDEs toolbar or run it directly from the terminal:

  • on macOS/Linux
    ./gradlew :composeApp:run
    
  • on Windows
    .\gradlew.bat :composeApp:run
    

Build and Run iOS Application

To build and run the development version of the iOS app, use the run configuration from the run widget in your IDEs toolbar or open the /iosApp directory in Xcode and run it from there.


Learn more about Kotlin Multiplatform

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Mantra as a kotlin multiplatform project
https://mantra.press
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