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@Gnuxie Gnuxie released this 16 Apr 13:37
· 131 commits to main since this release
v2.0.0-beta.0
20b5405

Process

We've now merged our changes to depend on the MPS (matrix-protection-suite). We're in the process of beta
testing v2.0.0 and this is the first of those pre-releases.

This release notes page is likely incomplete and will be updated
as more changes are uncovered or summarised.

What's Changed

  • Draupnir now uses MPS (matrix-protection-suite) to provide its core functionality.
  • Draupnir no longer requests components of room state when applying various actions, which should lead to a huge noticeable difference to Draupnir's responsiveness.
  • An optional RoomStateBackingStore has been added to improve startup time for instances that run against slow servers
    (e.g. matrix.org). Checkout the config description for it here.
  • New protections MemberBanSynchronisationProtection, ServerBanSynchronisationProtection, RedactionSynchronisationProtection, and PolicyChangeNotification.
    • These replace the core functionality for applying policies related to users, servers and redactions.
    • They will be enabled by default when you upgrade.
  • config.disableServerACL will disable the ServerBanSynchronisationProtection.
  • The joins, since, default, sync, protections status commands have all been removed for now.
  • The DetectFederationLag protection has been removed.
  • We have new contributing documentation.

Upgrade steps

There are no manual upgrade steps, the new protections are automatically enabled.
The only thing you should note is that if you notice that Draupnir is slow to startup, then you should enable the room state backing store

⚠️ Some configuration options may no longer be functioning (alternatives are pending)

  • config.noop will do nothing.
  • config.protectedRooms will also do nothing, and protected rooms need to be configured using !draupnir rooms add/remove.

Development Changes Summary

  • MPS now parses events sourced from /sync, appservice push, and
    other APIs for us, so no more any or unknown.
  • MPS provides us with string types for StringRoomID, StringEventID,
    and StringUserID. So no more mixing those up.
  • MPS provides us with an interface to immutable room state snapshots
    with the RoomStateRevisionIssuer and RoomStateRevision.
  • MPS provides PolicyRoomRevisionIssuer, PolicyRoomRevision,
    RoomMembershipRevisionIssuer, and RoomMembershipRevision to
    provide a convenient interface for listening to changes to
    room membership and policy rules.
  • MPS provides protections with new hooks:
    • handleTimelineEvent
    • handlePolicyChange
    • handleMembershipChange
    • handleStateChange
    • handleEventReport
    • handleProtectionDisable
  • Capability providers are introduced:
    • Each capability has an interface.
    • A CapabilityProvider constructs an instance, a Capability,
      that matches the matching capability interface.
  • Protections now carry out their effects through instances of
    Capability:
    • Each ProtectionDescription describes a capability set with
      their interfaces.
    • Each ProtectionDescription describes a default capability
      provider to use to fulfill the prior interface.
    • When a Protection is instantiated, capability providers can be
      swapped and replaced provided they match the same interface.
    • This means that you can extend or change the functionality
      of protections without changing the code of the protections.

Internal Changes

  • moved MatrixEmitter to matrix-protection-suite-for-matrix-bot-sdk and replaced with the SafeMatrixEmitter
  • moved ProtectedRoomsConfig to matrix-protection-suite and has been interfaced away from Mjolnir's account data.
  • moved ProtectedRoomsSet has been moved to matrix-protection-suite and now provides the fundamental event source for protections.
  • deleted RoomMembers and has not been completely replaced. In matrix-protection-suite there exists an alternative of SetMembership and RoomMembershipRevisions.
    • RoomMembers would only load members that had joined since Mjolnir had started, membership revisions have all members.
    • There is no API for finding when a member first joined the room, since this is a lot more complicated to do and I don't know yet if that
      is the right metric protections should use for finding if a user is new or not or participating.
  • moved AccessControlUnit to matrix-protection-suite, it no longer acts as a cache for rules though, PolicyRoomRevisions handle that instead.
  • moved ListRule to matrix-protections-suite as PolicyRule.
  • deleted PolicyList. Has been replaced by distinct components
    • PolicyRoomRevision: An immutable snapshot of policies in a room.
    • PolicyRoomRevisionIssuer: Creates PolicyRoomRevisions as room state changes and emits events to notify listeners.
    • PolicyRoomEditor: Edits policies in a policy room.
    • PolicyRoomManager: Provides and builds the issuers and editors.
  • deleted PolicyListManager. Has been replaced with PolicyListConfig in the matrix-protection-suite.
  • moved ServerACL to matrix-protection-suite, now called the ServerACLBuilder.
  • renamed Mjolnir to Draupnir.
    • Draupnir has far fewer responsibilities than Mjolnir, we have and are continuing to move as much functionality as possible to protections.
  • deleted RuleServer this was never used in production and we do not have access to the Synapse module it was written for, so it is impossible to maintain.
  • moved RoomUpdateError to the matrix-protection-suite.
  • moved several interface manager components to MPS:
    • CommandError and CommandException are now ActionError and ActionException.
    • MatrixRoomReference types are now sourced from the matrix-protection-suite.
    • There are new string types for StringUserID, StringRoomID and StringEventID.
  • deleted room directory commands
    • 76a58b6
    • It didn't seem like these ever worked with a Synapse admin API?
  • deleted joins and since commands:
    • joins depended on the API RoomMembers provided and we do not have a replacement for finding the join time.
    • They did not work as intended because they could only provide information for joins that happened while Draupnir
      was running.
    • If necessary, we could bring back an equivalent API that shows anyone with a top level membership of join
      as a recent joiner.
  • deleted default banlist command, as there is no place where we have a default list.
    • The implementation from Mjolnir stored this list as a "default shortcode" to find a list with, which is not great either.
  • deleted sync command
    • As all functionality that the sync command effected has now been moved to protections,
      the concept doesn't move across very well. There might be a replacement in future if it makes sense.
  • deleted DetectFederationLag this is a pretty huge protection 4b41541
    • It can be brought back in the future, there is not time to make it work and it never did work as intended.
    • It is a shame because it was a bold piece of work.
  • deleted protections status <protection> command.
    • There needs to be some thought about how to give protections their own commands.
    • fc163ed
    • 4110b62
  • ? verify permissions command may or may not be working?
  • moved all remaining commands to use the interface manager introduced in v1.80.0.
  • deleted Mjolnir's ProtectionManager as it has been made redundant in MPS.
  • replaced consequences. The same functionality is now provided by CapabilityProviders.
  • deleted AppServiceBotEmitter. No code uses emitters anymore.
  • added DraupnirFactory:
    • This uses matrix-protetion-suite's ClientsInRoomsMap and RoomStateManagerFactory to create Draupnir.
  • delted MjolnirManager:
    • Now depends on a DraupnirManager and AppserviceDraupnirManager which have smaller and cleaner implementations.
  • added <span> to DeadDocument
  • enabled Member/ServerBanSynchronisation protections by default
  • added RoomStateBackingStore.
  • pass config.disableServerACL to ServerBanSynchronisationProtection
  • added PolicyChangeNotificationProtection

Full Changelog: v1.87.0...v2.0.0-beta.0

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