Extend ChatSDK with GroupChat

Estimated date of completion: 2025/11/18

Resources Required for 2025H2:

Risks

(Schedule)(Medium) - Task Dependency: This task is dependent on ChatSDK - Developer Preview. Delays there will translate into delays in this project.
(Technical)(Medium) - Lack of Libraries: There currently does not exist the required libraries in Nim to build groupchat. This will involve evaluating the potential of calling an existing library via FFI or implementing it from scratch. This can be mitigated by vetting existing library potential should occur early or finding security reviewers for nim implemented cryptography.
(Technical)(Low) - Group chat is prone to bugs, even when using existing encryption protocols. Extra time has been alocated to testing and debugging in an effort to mitigate this, however it still remains a risk.

This milestone is complete when apps like Status can build a chat experience which includes support for multiple device, and multiple participants.

This is not intended to mark the end of ChatSDK development, but a usable sdk for intial builders.

FURPS: Group Chat

GitHub Milestone and deliverables:

Group Chat

Owner: Chat Research

Feature: Group Chat

FURPS:

F1. Accounts can receive a message in multiple locations (e.g. devices) by registering new installations.
F2. Accounts can view and remove installations as needed.
F3. Accounts can create GroupChats between multiple accounts.
F4. Participants can set a group name and description for all participants in the group.
F5. Account can view all provisioned installations.
F6. Account can revoke other installations in case of a lost device.
R1. Group Participants in a conversation can tell if a message is missing, and who sent it.
P1. The number of network messages for a single outbound group message does not scale with the number of group members.
+PRIV1. Non-participants cannot correlate a group conversation to any of its participants.
+PRIV2. No identifying information is visible when registering an installation.

Checklist:

Owner: Chat Eng

Feature: Bindings

Dependencies: [ChatSDK - GroupChat ]

FURPS:

Checklist: