Commit Graph

633 Commits

Author SHA1 Message Date
Patrick Cloke
d0e78af35e
Add missing type hints to synapse.replication. (#11938) 2022-02-08 11:03:08 -05:00
Patrick Cloke
6c0984e3f0
Remove unnecessary ignores due to Twisted upgrade. (#11939)
Twisted 22.1.0 fixed some internal type hints, allowing Synapse
to remove ignore calls for parameters to connectTCP.
2022-02-08 09:15:59 -05:00
Patrick Cloke
63d90f10ec
Add missing type hints to synapse.replication.http. (#11856) 2022-02-08 07:44:39 -05:00
Richard van der Hoff
2277275485
Stop reading from event_reference_hashes (#11794)
Preparation for dropping this table altogether. Part of #6574.
2022-01-21 09:18:10 +00:00
Patrick Cloke
10a88ba91c
Use auto_attribs/native type hints for attrs classes. (#11692) 2022-01-13 13:49:28 +00:00
Richard van der Hoff
2359ee3864
Remove redundant get_current_events_token (#11643)
* Push `get_room_{min,max_stream_ordering}` into StreamStore

Both implementations of this are identical, so we may as well push it down and
get rid of the abstract base class nonsense.

* Remove redundant `StreamStore` class

This is empty now

* Remove redundant `get_current_events_token`

This was an exact duplicate of `get_room_max_stream_ordering`, so let's get rid
of it.

* newsfile
2022-01-04 16:10:27 +00:00
Patrick Cloke
cbd82d0b2d
Convert all namedtuples to attrs. (#11665)
To improve type hints throughout the code.
2021-12-30 18:47:12 +00:00
Sean Quah
5305a5e881
Type hint the constructors of the data store classes (#11555) 2021-12-13 17:05:00 +00:00
Quentin Gliech
a15a893df8
Save the OIDC session ID (sid) with the device on login (#11482)
As a step towards allowing back-channel logout for OIDC.
2021-12-06 12:43:06 -05:00
Sean Quah
ffd858aa68
Add type hints to synapse/storage/databases/main/events_worker.py (#11411)
Also refactor the stream ID trackers/generators a bit and try to
document them better.
2021-11-26 18:41:31 +00:00
Patrick Cloke
5cace20bf1
Add missing type hints to synapse.app. (#11287) 2021-11-10 15:06:54 -05:00
Nick Barrett
af54167516
Enable passing typing stream writers as a list. (#11237)
This makes the typing stream writer config match the other stream writers
that only currently support a single worker.
2021-11-03 14:25:47 +00:00
Brendan Abolivier
c7a5e49664
Implement an on_new_event callback (#11126)
Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
2021-10-26 15:17:36 +02:00
Sean Quah
2b82ec425f
Add type hints for most HomeServer parameters (#11095) 2021-10-22 18:15:41 +01:00
Sean Quah
6a67f3786a
Fix logging context warnings when losing replication connection (#10984)
Instead of triggering `__exit__` manually on the replication handler's
logging context, use it as a context manager so that there is an
`__enter__` call to balance the `__exit__`.
2021-10-15 13:10:58 +01:00
Sean Quah
6b18eb4430
Fix opentracing and Prometheus metrics for replication requests (#10996)
This commit fixes two bugs to do with decorators not instrumenting
`ReplicationEndpoint`'s `send_request` correctly. There are two
decorators on `send_request`: Prometheus' `Gauge.track_inprogress()`
and Synapse's `opentracing.trace`.

`Gauge.track_inprogress()` does not have any support for async
functions when used as a decorator. Since async functions behave like
regular functions that return coroutines, only the creation of the
coroutine was covered by the metric and none of the actual body of
`send_request`.

`Gauge.track_inprogress()` returns a regular, non-async function
wrapping `send_request`, which is the source of the next bug.
The `opentracing.trace` decorator would normally handle async functions
correctly, but since the wrapped `send_request` is a non-async function,
the decorator ends up suffering from the same issue as
`Gauge.track_inprogress()`: the opentracing span only measures the
creation of the coroutine and none of the actual function body.

Using `Gauge.track_inprogress()` as a context manager instead of a
decorator resolves both bugs.
2021-10-12 11:23:46 +01:00
David Robertson
51a5da74cc
Annotate synapse.storage.util (#10892)
Also mark `synapse.streams` as having has no untyped defs

Co-authored-by: Sean Quah <8349537+squahtx@users.noreply.github.com>
2021-10-08 14:25:16 +00:00
Patrick Cloke
f4b1a9a527
Require direct references to configuration variables. (#10985)
This removes the magic allowing accessing configurable
variables directly from the config object. It is now required
that a specific configuration class is used (e.g. `config.foo`
must be replaced with `config.server.foo`).
2021-10-06 10:47:41 -04:00
David Robertson
29364145b2
Pass str to twisted's IReactorTCP (#10895)
This follows a correction made in twisted/twisted#1664 and should fix our Twisted Trial CI job.

Until that change is in a twisted release, we'll have to ignore the type
of the `host` argument. I've raised #10899 to remind us to review the
issue in a few months' time.
2021-09-30 12:51:47 +01:00
Patrick Cloke
94b620a5ed
Use direct references for configuration variables (part 6). (#10916) 2021-09-29 06:44:15 -04:00
Patrick Cloke
bb7fdd821b
Use direct references for configuration variables (part 5). (#10897) 2021-09-24 07:25:21 -04:00
Patrick Cloke
01c88a09cd
Use direct references for some configuration variables (#10798)
Instead of proxying through the magic getter of the RootConfig
object. This should be more performant (and is more explicit).
2021-09-13 13:07:12 -04:00
Richard van der Hoff
1800aabfc2
Split FederationHandler in half (#10692)
The idea here is to take anything to do with incoming events and move it out to a separate handler, as a way of making FederationHandler smaller.
2021-08-26 21:41:44 +01:00
Andrew Morgan
84469bdac7
Remove the unused public_room_list_stream (#10565)
Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
2021-08-17 14:02:50 +01:00
Richard van der Hoff
d9cb658c78
Fix up type hints for Twisted 21.7 (#10490)
Mostly this involves decorating a few Deferred declarations with extra type hints. We wrap the types in quotes to avoid runtime errors when running against older versions of Twisted that don't have generics on Deferred.
2021-07-28 12:04:11 +00:00
Šimon Brandner
c3b037795a
Support for MSC2285 (hidden read receipts) (#10413)
Implementation of matrix-org/matrix-doc#2285
2021-07-28 10:05:11 +02:00
Jonathan de Jong
bf72d10dbf
Use inline type hints in various other places (in synapse/) (#10380) 2021-07-15 11:02:43 +01:00
Quentin Gliech
bd4919fb72
MSC2918 Refresh tokens implementation (#9450)
This implements refresh tokens, as defined by MSC2918

This MSC has been implemented client side in Hydrogen Web: vector-im/hydrogen-web#235

The basics of the MSC works: requesting refresh tokens on login, having the access tokens expire, and using the refresh token to get a new one.

Signed-off-by: Quentin Gliech <quentingliech@gmail.com>
2021-06-24 14:33:20 +01:00
Marcus
8070b893db
update black to 21.6b0 (#10197)
Reformat all files with the new version.

Signed-off-by: Marcus Hoffmann <bubu@bubu1.eu>
2021-06-17 15:20:06 +01:00
Richard van der Hoff
d7808a2dde
Extend ResponseCache to pass a context object into the callback (#10157)
This is the first of two PRs which seek to address #8518. This first PR lays the groundwork by extending ResponseCache; a second PR (#10158) will update the SyncHandler to actually use it, and fix the bug.

The idea here is that we allow the callback given to ResponseCache.wrap to decide whether its result should be cached or not. We do that by (optionally) passing a ResponseCacheContext into it, which it can modify.
2021-06-14 10:26:09 +01:00
Sorunome
d936371b69
Implement knock feature (#6739)
This PR aims to implement the knock feature as proposed in https://github.com/matrix-org/matrix-doc/pull/2403

Signed-off-by: Sorunome mail@sorunome.de
Signed-off-by: Andrew Morgan andrewm@element.io
2021-06-09 19:39:51 +01:00
Richard van der Hoff
1bf83a191b
Clean up the interface for injecting opentracing over HTTP (#10143)
* Remove unused helper functions

* Clean up the interface for injecting opentracing over HTTP

* changelog
2021-06-09 11:33:00 +01:00
Richard van der Hoff
224f2f949b
Combine LruCache.invalidate and invalidate_many (#9973)
* Make `invalidate` and `invalidate_many` do the same thing

... so that we can do either over the invalidation replication stream, and also
because they always confused me a bit.

* Kill off `invalidate_many`

* changelog
2021-05-27 10:33:56 +01:00
Richard van der Hoff
c0df6bae06
Remove keylen from LruCache. (#9993)
`keylen` seems to be a thing that is frequently incorrectly set, and we don't really need it.

The only time it was used was to figure out if we had removed a subtree in `del_multi`, which we can do better by changing `TreeCache.pop` to return a different type (`TreeCacheNode`).

Commits should be independently reviewable.
2021-05-24 14:02:01 +01:00
Erik Johnston
3e831f24ff
Don't hammer the database for destination retry timings every ~5mins (#10036) 2021-05-21 17:57:08 +01:00
Andrew Morgan
4d6e5a5e99
Use a database table to hold the users that should have full presence sent to them, instead of something in-memory (#9823) 2021-05-18 14:13:45 +01:00
Richard van der Hoff
b378d98c8f
Add debug logging for issue #9533 (#9959)
Hopefully this will help us track down where to-device messages are getting
lost/delayed.
2021-05-11 11:04:03 +01:00
Erik Johnston
e3bc4617fc
Time external cache response time (#9904) 2021-05-04 15:14:22 +01:00
Erik Johnston
9d25a0ae65
Split presence out of master (#9820) 2021-04-23 12:21:55 +01:00
Richard van der Hoff
294c675033
Remove synapse.types.Collection (#9856)
This is no longer required, since we have dropped support for Python 3.5.
2021-04-22 16:43:50 +01:00
Andrew Morgan
4b2217ace2 Merge branch 'master' into develop 2021-04-21 14:55:06 +01:00
Richard van der Hoff
5d281c10dd
Stop BackgroundProcessLoggingContext making new prometheus timeseries (#9854)
This undoes part of b076bc276e.
2021-04-21 10:03:31 +01:00
Andrew Morgan
6982db9651 Merge branch 'master' into develop 2021-04-20 14:55:16 +01:00
Patrick Cloke
b076bc276e
Always use the name as the log ID. (#9829)
As far as I can tell our logging contexts are meant to log the request ID, or sometimes the request ID followed by a suffix (this is generally stored in the name field of LoggingContext). There's also code to log the name@memory location, but I'm not sure this is ever used.

This simplifies the code paths to require every logging context to have a name and use that in logging. For sub-contexts (created via nested_logging_contexts, defer_to_threadpool, Measure) we use the current context's str (which becomes their name or the string "sentinel") and then potentially modify that (e.g. add a suffix).
2021-04-20 14:19:00 +01:00
Erik Johnston
de0d088adc
Add presence federation stream (#9819) 2021-04-20 14:11:24 +01:00
Erik Johnston
00a6db9676
Move some replication processing out of generic_worker (#9796)
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
2021-04-14 17:06:06 +01:00
Jonathan de Jong
4b965c862d
Remove redundant "coding: utf-8" lines (#9786)
Part of #9744

Removes all redundant `# -*- coding: utf-8 -*-` lines from files, as python 3 automatically reads source code as utf-8 now.

`Signed-off-by: Jonathan de Jong <jonathan@automatia.nl>`
2021-04-14 15:34:27 +01:00
Patrick Cloke
48d44ab142
Record more information into structured logs. (#9654)
Records additional request information into the structured logs,
e.g. the requester, IP address, etc.
2021-04-08 08:01:14 -04:00
Jonathan de Jong
e2b8a90897
Update mypy configuration: no_implicit_optional = True (#9742) 2021-04-05 09:10:18 -04:00
Erik Johnston
963f4309fe
Make RateLimiter class check for ratelimit overrides (#9711)
This should fix a class of bug where we forget to check if e.g. the appservice shouldn't be ratelimited.

We also check the `ratelimit_override` table to check if the user has ratelimiting disabled. That table is really only meant to override the event sender ratelimiting, so we don't use any values from it (as they might not make sense for different rate limits), but we do infer that if ratelimiting is disabled for the user we should disabled all ratelimits.

Fixes #9663
2021-03-30 12:06:09 +01:00
Patrick Cloke
da75d2ea1f
Add type hints for the federation sender. (#9681)
Includes an abstract base class which both the FederationSender
and the FederationRemoteSendQueue must implement.
2021-03-29 11:43:20 -04:00
Erik Johnston
b5efcb577e
Make it possible to use dmypy (#9692)
Running `dmypy run` will do a `mypy` check while spinning up a daemon
that makes rerunning `dmypy run` a lot faster.

`dmypy` doesn't support `follow_imports = silent` and has
`local_partial_types` enabled, so this PR enables those options and
fixes the issues that were newly raised. Note that `local_partial_types`
will be enabled by default in upcoming mypy releases.
2021-03-26 16:49:46 +00:00
Patrick Cloke
b7748d3c00
Import HomeServer from the proper module. (#9665) 2021-03-23 07:12:48 -04:00
Patrick Cloke
cc324d53fe
Fix up types for the typing handler. (#9638)
By splitting this to two separate methods the callers know
what methods they can expect on the handler.
2021-03-17 11:30:21 -04:00
Richard van der Hoff
567f88f835
Prep work for removing outlier from internal_metadata (#9411)
* Populate `internal_metadata.outlier` based on `events` table

Rather than relying on `outlier` being in the `internal_metadata` column,
populate it based on the `events.outlier` column.

* Move `outlier` out of InternalMetadata._dict

Ultimately, this will allow us to stop writing it to the database. For now, we
have to grandfather it back in so as to maintain compatibility with older
versions of Synapse.
2021-03-17 12:33:18 +00:00
Patrick Cloke
d29b71aa50
Fix remaining mypy issues due to Twisted upgrade. (#9608) 2021-03-15 11:14:39 -04:00
Patrick Cloke
55da8df078
Fix additional type hints from Twisted 21.2.0. (#9591) 2021-03-12 11:37:57 -05:00
Richard van der Hoff
464e5da7b2
Add logging for redis connection setup (#9590) 2021-03-11 18:35:09 +00:00
Richard van der Hoff
1107214a1d
Fix the auth provider on the logins metric (#9573)
We either need to pass the auth provider over the replication api, or make sure
we report the auth provider on the worker that received the request. I've gone
with the latter.
2021-03-10 18:15:03 +00:00
Jonathan de Jong
d6196efafc
Add ResponseCache tests. (#9458) 2021-03-08 14:00:07 -05:00
Patrick Cloke
58114f8a17
Create a SynapseReactor type which incorporates the necessary reactor interfaces. (#9528)
This helps fix some type hints when running with Twisted 21.2.0.
2021-03-08 08:25:43 -05:00
Patrick Cloke
33a02f0f52
Fix additional type hints from Twisted upgrade. (#9518) 2021-03-03 15:47:38 -05:00
Patrick Cloke
0c330423bc
Bump the mypy and mypy-zope versions. (#9529) 2021-03-03 07:19:19 -05:00
Patrick Cloke
a0bc9d387e
Use the proper Request in type hints. (#9515)
This also pins the Twisted version in the mypy job for CI until
proper type hints are fixed throughout Synapse.
2021-03-01 12:23:46 -05:00
Erik Johnston
66f4949e7f
Fix deleting pushers when using sharded pushers. (#9465) 2021-02-22 21:14:42 +00:00
AndrewFerr
9bc74743d5
Add configs to make profile data more private (#9203)
Add off-by-default configuration settings to:
- disable putting an invitee's profile info in invite events
- disable profile lookup via federation

Signed-off-by: Andrew Ferrazzutti <fair@miscworks.net>
2021-02-19 09:50:41 +00:00
Eric Eastwood
0a00b7ff14
Update black, and run auto formatting over the codebase (#9381)
- Update black version to the latest
 - Run black auto formatting over the codebase
    - Run autoformatting according to [`docs/code_style.md
`](80d6dc9783/docs/code_style.md)
 - Update `code_style.md` docs around installing black to use the correct version
2021-02-16 22:32:34 +00:00
Erik Johnston
6aa87f8ce3
Ensure that we never stop reconnecting to redis (#9391) 2021-02-11 16:06:29 +00:00
Erik Johnston
dd8da8c5f6
Precompute joined hosts and store in Redis (#9198) 2021-01-26 13:57:31 +00:00
Erik Johnston
a1ff1e967f
Periodically send pings to detect dead Redis connections (#9218)
This is done by creating a custom `RedisFactory` subclass that
periodically pings all connections in its pool.

We also ensure that the `replyTimeout` param is non-null, so that we
timeout waiting for the reply to those pings (and thus triggering a
reconnect).
2021-01-26 10:54:54 +00:00
Erik Johnston
6633a4015a
Allow moving account data and receipts streams off master (#9104) 2021-01-18 15:47:59 +00:00
Erik Johnston
f08ef64926
Enforce all replication HTTP clients calls use kwargs (#9144) 2021-01-18 15:24:04 +00:00
Erik Johnston
b530eaa262
Allow running sendToDevice on workers (#9044) 2021-01-07 20:19:26 +00:00
Erik Johnston
63593134a1
Some cleanups to device inbox store. (#9041) 2021-01-07 17:20:44 +00:00
Erik Johnston
a7a913918c Merge remote-tracking branch 'origin/erikj/as_mau_block' into develop 2020-12-18 09:51:56 +00:00
Erik Johnston
4c33796b20 Correctly handle AS registerations and add test 2020-12-17 12:55:21 +00:00
Patrick Cloke
bd30cfe86a
Convert internal pusher dicts to attrs classes. (#8940)
This improves type hinting and should use less memory.
2020-12-16 11:25:30 -05:00
Patrick Cloke
1619802228
Various clean-ups to the logging context code (#8935) 2020-12-14 14:19:47 -05:00
Patrick Cloke
96358cb424
Add authentication to replication endpoints. (#8853)
Authentication is done by checking a shared secret provided
in the Synapse configuration file.
2020-12-04 10:56:28 -05:00
Andrew Morgan
5cbe8d93fe
Add typing to membership Replication class methods (#8809)
This PR grew out of #6739, and adds typing to some method arguments

You'll notice that there are a lot of `# type: ignores` in here. This is due to the base methods not matching the overloads here. This is necessary to stop mypy complaining, but a better solution is #8828.
2020-11-27 10:49:38 +00:00
Andrew Morgan
e8d0853739
Generalise _maybe_store_room_on_invite (#8754)
There's a handy function called maybe_store_room_on_invite which allows us to create an entry in the rooms table for a room and its version for which we aren't joined to yet, but we can reference when ingesting events about.

This is currently used for invites where we receive some stripped state about the room and pass it down via /sync to the client, without us being in the room yet.

There is a similar requirement for knocking, where we will eventually do the same thing, and need an entry in the rooms table as well. Thus, reusing this function works, however its name needs to be generalised a bit.

Separated out from #6739.
2020-11-13 16:24:04 +00:00
Erik Johnston
f21e24ffc2
Add ability for access tokens to belong to one user but grant access to another user. (#8616)
We do it this way round so that only the "owner" can delete the access token (i.e. `/logout/all` by the "owner" also deletes that token, but `/logout/all` by the "target user" doesn't).

A future PR will add an API for creating such a token.

When the target user and authenticated entity are different the `Processed request` log line will be logged with a: `{@admin:server as @bob:server} ...`. I'm not convinced by that format (especially since it adds spaces in there, making it harder to use `cut -d ' '` to chop off the start of log lines). Suggestions welcome.
2020-10-29 15:58:44 +00:00
Erik Johnston
a6ea1a957e
Don't pull event from DB when handling replication traffic. (#8669)
I was trying to make it so that we didn't have to start a background task when handling RDATA, but that is a bigger job (due to all the code in `generic_worker`). However I still think not pulling the event from the DB may help reduce some DB usage due to replication, even if most workers will simply go and pull that event from the DB later anyway.

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
2020-10-28 12:11:45 +00:00
Erik Johnston
4215a3acd4
Don't unnecessarily start bg process in replication sending loop. (#8670) 2020-10-27 17:37:08 +00:00
Erik Johnston
2b7c180879
Start fewer opentracing spans (#8640)
#8567 started a span for every background process. This is good as it means all Synapse code that gets run should be in a span (unless in the sentinel logging context), but it means we generate about 15x the number of spans as we did previously.

This PR attempts to reduce that number by a) not starting one for send commands to Redis, and b) deferring starting background processes until after we're sure they're necessary.

I don't really know how much this will help.
2020-10-26 09:30:19 +00:00
Richard van der Hoff
97647b33c2
Replace DeferredCache with LruCache where possible (#8563)
Most of these uses don't need a full-blown DeferredCache; LruCache is lighter and more appropriate.
2020-10-19 12:20:29 +01:00
Richard van der Hoff
4182bb812f move DeferredCache into its own module 2020-10-14 23:38:14 +01:00
Richard van der Hoff
9f87da0a84 Rename Cache->DeferredCache 2020-10-14 23:38:14 +01:00
Richard van der Hoff
7eff59ec91 Add some more type annotations to Cache 2020-10-14 23:38:14 +01:00
Erik Johnston
b2486f6656
Fix message duplication if something goes wrong after persisting the event (#8476)
Should fix #3365.
2020-10-13 12:07:56 +01:00
Erik Johnston
8de3703d21
Make event persisters periodically announce position over replication. (#8499)
Currently background proccesses stream the events stream use the "minimum persisted position" (i.e. `get_current_token()`) rather than the vector clock style tokens. This is broadly fine as it doesn't matter if the background processes lag a small amount. However, in extreme cases (i.e. SyTests) where we only write to one event persister the background processes will never make progress.

This PR changes it so that the `MultiWriterIDGenerator` keeps the current position of a given instance as up to date as possible (i.e using the latest token it sees if its not in the process of persisting anything), and then periodically announces that over replication. This then allows the "minimum persisted position" to advance, albeit with a small lag.
2020-10-12 15:51:41 +01:00
Patrick Cloke
1781bbe319
Add type hints to response cache. (#8507) 2020-10-09 11:35:11 -04:00
Erik Johnston
5009ffcaa4
Only send RDATA for instance local events. (#8496)
When pulling events out of the DB to send over replication we were not
filtering by instance name, and so we were sending events for other
instances.
2020-10-09 13:10:33 +01:00
Patrick Cloke
c9c0ad5e20
Remove the deprecated Handlers object (#8494)
All handlers now available via get_*_handler() methods on the HomeServer.
2020-10-09 07:24:34 -04:00
Erik Johnston
6c5d5e507e
Add unit test for event persister sharding (#8433) 2020-10-02 09:57:12 +01:00
Patrick Cloke
4ff0201e62
Enable mypy checking for unreachable code and fix instances. (#8432) 2020-10-01 08:09:18 -04:00
Erik Johnston
ea70f1c362
Various clean ups to room stream tokens. (#8423) 2020-09-29 21:48:33 +01:00
Richard van der Hoff
866c84da8d
Add metrics to track success/otherwise of replication requests (#8406)
One hope is that this might provide some insights into #3365.
2020-09-29 11:06:11 +01:00
Erik Johnston
f112cfe5bb
Fix MultiWriteIdGenerator's handling of restarts. (#8374)
On startup `MultiWriteIdGenerator` fetches the maximum stream ID for
each instance from the table and uses that as its initial "current
position" for each writer. This is problematic as a) it involves either
a scan of events table or an index (neither of which is ideal), and b)
if rows are being persisted out of order elsewhere while the process
restarts then using the maximum stream ID is not correct. This could
theoretically lead to race conditions where e.g. events that are
persisted out of order are not sent down sync streams.

We fix this by creating a new table that tracks the current positions of
each writer to the stream, and update it each time we finish persisting
a new entry. This is a relatively small overhead when persisting events.
However for the cache invalidation stream this is a much bigger relative
overhead, so instead we note that for invalidation we don't actually
care about reliability over restarts (as there's no caches to
invalidate) and simply don't bother reading and writing to the new table
in that particular case.
2020-09-24 16:53:51 +01:00
Erik Johnston
ac11fcbbb8
Add EventStreamPosition type (#8388)
The idea is to remove some of the places we pass around `int`, where it can represent one of two things:

1. the position of an event in the stream; or
2. a token that partitions the stream, used as part of the stream tokens.

The valid operations are then:

1. did a position happen before or after a token;
2. get all events that happened before or after a token; and
3. get all events between two tokens.

(Note that we don't want to allow other operations as we want to change the tokens to be vector clocks rather than simple ints)
2020-09-24 13:24:17 +01:00