Commit Graph

3909 Commits

Author SHA1 Message Date
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
Jason Robinson
31c6b30dd4
Fix import of the default SAML mapping provider. (#10477)
Fix a circular import, which was causing exceptions on boot if SAML
was configured.
2021-07-27 11:34:15 -04:00
Andrew Morgan
74d09a43d9
Always communicate device OTK counts to clients (#10485)
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
2021-07-27 14:36:38 +01:00
Patrick Cloke
228decfce1
Update the MSC3083 support to verify if joins are from an authorized server. (#10254) 2021-07-26 12:17:00 -04:00
Brendan Abolivier
a743bf4694
Port the ThirdPartyEventRules module interface to the new generic interface (#10386)
Port the third-party event rules interface to the generic module interface introduced in v1.37.0
2021-07-20 12:39:46 +02:00
Erik Johnston
f3ac9c6750
Fix exception when failing to get remote room list (#10414) 2021-07-20 11:35:23 +01:00
Jonathan de Jong
95e47b2e78
[pyupgrade] synapse/ (#10348)
This PR is tantamount to running 
```
pyupgrade --py36-plus --keep-percent-format `find synapse/ -type f -name "*.py"`
```

Part of #9744
2021-07-19 15:28:05 +01:00
Jonathan de Jong
98aec1cc9d
Use inline type hints in handlers/ and rest/. (#10382) 2021-07-16 18:22:36 +01:00
Brendan Abolivier
36dc15412d
Add a module type for account validity (#9884)
This adds an API for third-party plugin modules to implement account validity, so they can provide this feature instead of Synapse. The module implementing the current behaviour for this feature can be found at https://github.com/matrix-org/synapse-email-account-validity.

To allow for a smooth transition between the current feature and the new module, hooks have been added to the existing account validity endpoints to allow their behaviours to be overridden by a module.
2021-07-16 18:11:53 +02:00
Erik Johnston
7695ca0618
Fix a number of logged errors caused by remote servers being down. (#10400) 2021-07-15 10:35:46 +01:00
Patrick Cloke
2d16e69b4b
Show all joinable rooms in the spaces summary. (#10298)
Previously only world-readable rooms were shown. This means that
rooms which are public, knockable, or invite-only with a pending invitation,
are included in a space summary. It also applies the same logic to
the experimental room version from MSC3083 -- if a user has access
to the proper allowed rooms then it is shown in the spaces summary.

This change is made per MSC3173 allowing stripped state of a room to
be shown to any potential room joiner.
2021-07-13 08:59:27 -04:00
Eric Eastwood
d26094e92c
Add base starting insertion event when no chunk ID is provided (MSC2716) (#10250)
* Add base starting insertion point when no chunk ID is provided

This is so we can have the marker event point to this initial
insertion event and be able to traverse the events in the first chunk.
2021-07-08 20:25:59 -05:00
Cristina
f6767abc05
Remove functionality associated with unused historical stats tables (#9721)
Fixes #9602
2021-07-08 16:57:13 +01:00
Brendan Abolivier
225be77787
Rebuild event auth when rebuilding an event after a call to a ThirdPartyEventRules module (#10316)
Because modules might send extra state events when processing an event (e.g. matrix-org/synapse-dinsic#100), and in some cases these extra events might get dropped if we don't recalculate the initial event's auth.
2021-07-08 13:00:05 +02:00
Dagfinn Ilmari Mannsåker
47e28b4031
Ignore EDUs for rooms we're not in (#10317) 2021-07-06 14:31:13 +01:00
Patrick Cloke
8d609435c0
Move methods involving event authentication to EventAuthHandler. (#10268)
Instead of mixing them with user authentication methods.
2021-07-01 14:25:37 -04:00
Dirk Klimpel
6c02cca95f
Add SSO external_ids to Query User Account admin API (#10261)
Related to #10251
2021-07-01 11:26:24 +02:00
Patrick Cloke
aaf7d1acb8
Correct type hints for synapse.event_auth. (#10253) 2021-06-30 07:08:42 -04:00
Patrick Cloke
f55836929d
Do not recurse into non-spaces in the spaces summary. (#10256)
Previously m.child.room events in non-space rooms would be
treated as part of the room graph, but this is no longer
supported.
2021-06-29 12:00:04 -04:00
Richard van der Hoff
8165ba48b1
Return errors from send_join etc if the event is rejected (#10243)
Rather than persisting rejected events via `send_join` and friends, raise a 403 if someone tries to pull a fast one.
2021-06-24 16:00:08 +01:00
Richard van der Hoff
6e8fb42be7
Improve validation for send_{join,leave,knock} (#10225)
The idea here is to stop people sending things that aren't joins/leaves/knocks through these endpoints: previously you could send anything you liked through them. I wasn't able to find any security holes from doing so, but it doesn't sound like a good thing.
2021-06-24 15:30:49 +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
Brendan Abolivier
e19e3d452d
Improve the reliability of auto-joining remote rooms (#10237)
If a room is remote and we don't have a user in it, always try to join it. It might fail if the room is invite-only, but we don't have a user to invite with, so at this point it's the best we can do.

Fixes #10233 (at least to some extent)
2021-06-23 16:14:52 +02:00
Richard van der Hoff
8beead66ae
Send out invite rejections and knocks over federation (#10223)
ensure that events sent via `send_leave` and `send_knock` are sent on to
the rest of the federation.
2021-06-23 12:54:50 +01:00
Eric Eastwood
96f6293de5
Add endpoints for backfilling history (MSC2716) (#9247)
Work on https://github.com/matrix-org/matrix-doc/pull/2716
2021-06-22 10:02:53 +01:00
jkanefendt
756fd513df
Implement config option sso.update_profile_information (#10108)
Implemented config option sso.update_profile_information to keep user's display name in sync with the SSO displayname.

Signed-off-by: Johannes Kanefendt <johannes.kanefendt@krzn.de>
2021-06-21 23:48:57 +01:00
Andrew Morgan
182147195b
Check third party rules before persisting knocks over federation (#10212)
An accidental mis-ordering of operations during #6739 technically allowed an incoming knock event over federation in before checking it against any configured Third Party Access Rules modules.

This PR corrects that by performing the TPAR check *before* persisting the event.
2021-06-21 11:57:09 +01:00
Patrick Cloke
0bd968921c
Fix a missing await when in the spaces summary. (#10208)
This could cause a minor data leak if someone defined a non-restricted join rule
with an allow key or used a restricted join rule in an older room version, but this is
unlikely.

Additionally this starts adding unit tests to the spaces summary handler.
2021-06-18 18:41:33 +01:00
Brendan Abolivier
1b3e398bea
Standardise the module interface (#10062)
This PR adds a common configuration section for all modules (see docs). These modules are then loaded at startup by the homeserver. Modules register their hooks and web resources using the new `register_[...]_callbacks` and `register_web_resource` methods of the module API.
2021-06-18 12:15:52 +01:00
Brendan Abolivier
08c8469322
Remove support for ACME v1 (#10194)
Fixes #9778

ACME v1 has been fully decommissioned for existing installs on June 1st 2021(see https://community.letsencrypt.org/t/end-of-life-plan-for-acmev1/88430/27), so we can now safely remove it from Synapse.
2021-06-17 18:56:48 +01:00
Patrick Cloke
8c97d5863f
Update MSC3083 support per changes in the MSC. (#10189)
Adds a "type" field and generalize "space" to "room_id".
2021-06-17 12:53:27 -04:00
Richard van der Hoff
fcf3c7032b
Ensure that we do not cache empty sync responses after a timeout (#10158)
Fixes #8518 by telling the ResponseCache not to cache the /sync response if the next_batch param is the same as the since token.
2021-06-17 16:23:11 +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
Eric Eastwood
a911dd768b
Add fields to better debug where events are being soft_failed (#10168)
Follow-up to https://github.com/matrix-org/synapse/pull/10156#discussion_r650292223
2021-06-17 14:59:45 +01:00
Patrick Cloke
76f9c701c3
Always require users to re-authenticate for dangerous operations. (#10184)
Dangerous actions means deactivating an account, modifying an account
password, or adding a 3PID.

Other actions (deleting devices, uploading keys) can re-use the same UI
auth session if ui_auth.session_timeout is configured.
2021-06-16 11:07:28 -04:00
Patrick Cloke
4911f7931d
Remove support for unstable MSC1772 prefixes. (#10161)
The stable prefixes have been supported since v1.34.0. The unstable
prefixes are not supported by any known clients.
2021-06-15 08:03:17 -04:00
Patrick Cloke
9e5ab6dd58
Remove the experimental flag for knocking and use stable prefixes / endpoints. (#10167)
* Room version 7 for knocking.
* Stable prefixes and endpoints (both client and federation) for knocking.
* Removes the experimental configuration flag.
2021-06-15 07:45:14 -04:00
Erik Johnston
968f8283b4
Only send a presence state to a destination once (#10165)
It turns out that we were sending the same presence state to a remote
potentially multiple times.
2021-06-11 15:19:42 +01:00
Erik Johnston
c8dd4db9eb
Fix sending presence over federation when using workers (#10163)
When using a federation sender we'd send out all local presence updates over
federation even when they shouldn't be.

Fixes #10153.
2021-06-11 13:08:30 +01:00
Eric Eastwood
b31daac01c
Add metrics to track how often events are soft_failed (#10156)
Spawned from missing messages we were seeing on `matrix.org` from a
federated Gtiter bridged room, https://gitlab.com/gitterHQ/webapp/-/issues/2770.
The underlying issue in Synapse is tracked by https://github.com/matrix-org/synapse/issues/10066
where the message and join event race and the message is `soft_failed` before the
`join` event reaches the remote federated server.

Less soft_failed events = better and usually this should only trigger for events
where people are doing bad things and trying to fuzz and fake everything.
2021-06-11 10:12:35 +01:00
Andrew Morgan
a7a37437bc
Integrate knock rooms with the public rooms directory (#9359)
This PR implements the ["Changes regarding the Public Rooms Directory"](https://github.com/Sorunome/matrix-doc/blob/soru/knock/proposals/2403-knock.md#changes-regarding-the-public-rooms-directory) section of knocking MSC2403.

Specifically, it:

* Allows rooms with `join_rule` "knock" to be returned by the query behind the public rooms directory
* Adds the field `join_rule` to each room entry returned by a public rooms directory query, so clients can know whether to attempt a join or knock on a room

Based on https://github.com/matrix-org/synapse/issues/6739. Complement tests for this change: https://github.com/matrix-org/complement/pull/72
2021-06-09 20:31:31 +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
Patrick Cloke
11846dff8c
Limit the number of in-flight /keys/query requests from a single device. (#10144) 2021-06-09 07:05:32 -04:00
Patrick Cloke
c7f3fb2745
Add type hints to the federation server transport. (#10080) 2021-06-08 11:19:25 -04:00
Erik Johnston
a0101fc021
Handle /backfill returning no events (#10133)
Fixes #10123
2021-06-08 10:37:01 +01:00
14mRh4X0r
8942e23a69
Always update AS last_pos, even on no events (#10107)
Fixes #1834.

`get_new_events_for_appservice` internally calls `get_events_as_list`, which will filter out any rejected events. If all returned events are filtered out, `_notify_interested_services` will return without updating the last handled stream position. If there are 100 consecutive such events, processing will halt altogether.

Breaking the loop is now done by checking whether we're up-to-date with `current_max` in the loop condition, instead of relying on an empty `events` list.


Signed-off-by: Willem Mulder <14mRh4X0r@gmail.com>
2021-06-07 15:42:05 +01:00
Richard van der Hoff
fa1db8f156
Delete completes to-device messages earlier in /sync (#10124)
I hope this will improve
https://github.com/matrix-org/synapse/issues/9564.
2021-06-07 09:19:06 +01:00
Erik Johnston
a0cd8ae8cb
Don't try and backfill the same room in parallel. (#10116)
If backfilling is slow then the client may time out and retry, causing
Synapse to start a new `/backfill` before the existing backfill has
finished, duplicating work.
2021-06-04 10:47:58 +01:00
Erik Johnston
c96ab31dff
Limit number of events in a replication request (#10118)
Fixes #9956.
2021-06-04 10:35:47 +01:00
Patrick Cloke
3cf6b34b4e
Do not show invite-only rooms in spaces summary (unless joined/invited). (#10109) 2021-06-02 11:31:41 -04:00
Erik Johnston
4deaebfe00
Make /sync do less state res (#10102) 2021-06-02 15:48:17 +01:00
Richard van der Hoff
b4b2fd2ece
add a cache to have_seen_event (#9953)
Empirically, this helped my server considerably when handling gaps in Matrix HQ. The problem was that we would repeatedly call have_seen_events for the same set of (50K or so) auth_events, each of which would take many minutes to complete, even though it's only an index scan.
2021-06-01 12:04:47 +01:00
Brendan Abolivier
f828a70be3
Limit the number of events sent over replication when persisting events. (#10082) 2021-05-27 17:10:58 +01:00
Patrick Cloke
c5413d0e9e
Remove unused properties from the SpaceSummaryHandler. (#10038) 2021-05-21 12:02:01 -04:00
Patrick Cloke
551d2c3f4b
Allow a user who could join a restricted room to see it in spaces summary. (#9922)
This finishes up the experimental implementation of MSC3083 by showing
the restricted rooms in the spaces summary (from MSC2946).
2021-05-20 11:10:36 -04:00
Patrick Cloke
ac6bfcd52f
Refactor checking restricted join rules (#10007)
To be more consistent with similar code. The check now automatically
raises an AuthError instead of passing back a boolean. It also absorbs
some shared logic between callers.
2021-05-18 12:17:04 -04:00
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
Patrick Cloke
206a7b5f12
Fix the allowed range of valid ordering characters for spaces. (#10002)
\x7F was meant to be \0x7E (~) this was originally incorrect
in MSC1772.
2021-05-17 09:59:17 -04:00
Patrick Cloke
9752849e2b
Clarify comments in the space summary handler. (#9974) 2021-05-17 09:01:19 -04:00
Brendan Abolivier
41ac128fd3
Split multiplart email sending into a dedicated handler (#9977)
Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
2021-05-17 12:33:38 +02:00
Brendan Abolivier
a683028d81
Correctly ratelimit invites when creating a room (#9968)
* Correctly ratelimit invites when creating a room

Also allow ratelimiting for more than one action at a time.
2021-05-12 16:05:28 +02:00
Richard van der Hoff
7562d887e1
Change the format of access tokens away from macaroons (#5588) 2021-05-12 15:04:51 +01:00
Erik Johnston
affaffb0ab
Run cache_joined_hosts_for_event in background (#9951) 2021-05-12 13:17:11 +01:00
Patrick Cloke
27c375f812
Sort child events according to MSC1772 for the spaces summary API. (#9954)
This should help ensure that equivalent results are achieved between
homeservers querying for the summary of a space.

This implements modified MSC1772 rules, according to MSC2946.
The different is that the origin_server_ts of the m.room.create event
is not used as a tie-breaker since this might not be known if the
homeserver is not part of the room.
2021-05-11 12:57:39 -04:00
Richard van der Hoff
7967b36efe
Fix m.room_key_request to-device messages (#9961)
fixes #9960
2021-05-11 11:02:56 +01:00
Erik Johnston
2b2985b5cf
Improve performance of backfilling in large rooms. (#9935)
We were pulling the full auth chain for the room out of the DB each time
we backfilled, which can be *huge* for large rooms and is totally
unnecessary.
2021-05-10 13:29:02 +01:00
Erik Johnston
6c84778549
Always cache 'event_to_prev_state_group' (#9950)
Fixes regression in send PDU times introduced in #9905.
2021-05-07 14:54:09 +01:00
Patrick Cloke
d783880083
Include the time of the create event in Spaces Summary. (#9928)
This is an update based on changes to MSC2946. The origin_server_ts
of the m.room.create event is copied into the creation_ts field for each
room returned from the spaces summary.
2021-05-05 13:33:05 -04:00
Erik Johnston
37623e3382
Increase perf of handling presence when joining large rooms. (#9916) 2021-05-05 17:27:05 +01:00
Patrick Cloke
e2a443550e
Support stable MSC1772 spaces identifiers. (#9915)
Support both the unstable and stable identifiers. A future release
will disable the unstable identifiers.
2021-05-05 11:56:51 -04:00
Erik Johnston
de8f0a03a3
Don't set the external cache if its been done recently (#9905) 2021-05-05 16:53:22 +01:00
Erik Johnston
d0aee697ac
Use get_current_users_in_room from store and not StateHandler (#9910) 2021-05-05 16:49:34 +01:00
Patrick Cloke
bb4b11846f
Add missing type hints to handlers and fix a Spam Checker type hint. (#9896)
The user_may_create_room_alias method on spam checkers
declared the room_alias parameter as a str when in reality it is
passed a RoomAlias object.
2021-04-29 07:17:28 -04:00
Erik Johnston
802560211a Merge remote-tracking branch 'origin/release-v1.33.0' into develop 2021-04-28 14:43:10 +01:00
Erik Johnston
e4ab8676b4
Fix tight loop handling presence replication. (#9900)
Only affects workers. Introduced in #9819.

Fixes #9899.
2021-04-28 14:42:50 +01:00
Erik Johnston
dd2d32dcdb
Add type hints to presence handler (#9885) 2021-04-28 11:07:47 +01:00
Erik Johnston
0ffa5fb935
Use current state table for presence.get_interested_remotes (#9887)
This should be a lot quicker than asking the state handler.
2021-04-27 10:09:41 +01:00
Andrew Morgan
695b73c861
Allow OIDC cookies to work on non-root public baseurls (#9726)
Applied a (slightly modified) patch from https://github.com/matrix-org/synapse/issues/9574.

As far as I understand this would allow the cookie set during the OIDC flow to work on deployments using public baseurls that do not sit at the URL path root.
2021-04-23 18:22:47 +01:00
Erik Johnston
a15c003e5b
Make DomainSpecificString an attrs class (#9875) 2021-04-23 15:46:29 +01:00
Erik Johnston
9d25a0ae65
Split presence out of master (#9820) 2021-04-23 12:21:55 +01:00
Patrick Cloke
d924827da1
Check for space membership during a remote join of a restricted room (#9814)
When receiving a /send_join request for a room with join rules set to 'restricted',
check if the user is a member of the spaces defined in the 'allow' key of the join rules.

This only applies to an experimental room version, as defined in MSC3083.
2021-04-23 07:05:51 -04:00
Richard van der Hoff
69018acbd2
Clear the resync bit after resyncing device lists (#9867)
Fixes #9866.
2021-04-22 16:53:24 +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
Patrick Cloke
683d6f75af
Rename handler and config modules which end in handler/config. (#9816) 2021-04-20 14:55:20 -04:00
Erik Johnston
de0d088adc
Add presence federation stream (#9819) 2021-04-20 14:11:24 +01:00
Erik Johnston
db70435de7
Fix bug where we sent remote presence states to remote servers (#9850) 2021-04-20 13:37:54 +01:00
Jonathan de Jong
495b214f4f
Fix (final) Bugbear violations (#9838) 2021-04-20 11:50:49 +01:00
Andrew Morgan
71f0623de9
Port "Allow users to click account renewal links multiple times without hitting an 'Invalid Token' page #74" from synapse-dinsic (#9832)
This attempts to be a direct port of https://github.com/matrix-org/synapse-dinsic/pull/74 to mainline. There was some fiddling required to deal with the changes that have been made to mainline since (mainly dealing with the split of `RegistrationWorkerStore` from `RegistrationStore`, and the changes made to `self.make_request` in test code).
2021-04-19 19:16:34 +01:00
Denis Kasak
e694a598f8
Sanity check identity server passed to bind/unbind. (#9802)
Signed-off-by: Denis Kasak <dkasak@termina.org.uk>
2021-04-19 17:21:46 +01:00
Erik Johnston
2b7dd21655
Don't send normal presence updates over federation replication stream (#9828) 2021-04-19 10:50:49 +01:00
Andrew Morgan
c571736c6c
User directory: use calculated room membership state instead (#9821)
Fixes: #9797.

Should help reduce CPU usage on the user directory, especially when memberships change in rooms with lots of state history.
2021-04-16 18:17:18 +01:00
Patrick Cloke
936e69825a
Separate creating an event context from persisting it in the federation handler (#9800)
This refactoring allows adding logic that uses the event context
before persisting it.
2021-04-14 12:35:28 -04:00
Patrick Cloke
e8816c6ace Revert "Check for space membership during a remote join of a restricted room. (#9763)"
This reverts commit cc51aaaa7a.

The PR was prematurely merged and not yet approved.
2021-04-14 12:33:37 -04:00
Patrick Cloke
cc51aaaa7a
Check for space membership during a remote join of a restricted room. (#9763)
When receiving a /send_join request for a room with join rules set to 'restricted',
check if the user is a member of the spaces defined in the 'allow' key of the join
rules.
    
This only applies to an experimental room version, as defined in MSC3083.
2021-04-14 12:32:20 -04:00
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
Dan Callahan
1d5f0e3529
Bump black configuration to target py36 (#9781)
Signed-off-by: Dan Callahan <danc@element.io>
2021-04-13 10:41:34 +01:00
Jonathan de Jong
2ca4e349e9
Bugbear: Add Mutable Parameter fixes (#9682)
Part of #9366

Adds in fixes for B006 and B008, both relating to mutable parameter lint errors.

Signed-off-by: Jonathan de Jong <jonathan@automatia.nl>
2021-04-08 22:38:54 +01:00
Patrick Cloke
452991527a
MSC3083: Check for space membership during a local join of restricted rooms. (#9735)
When joining a room with join rules set to 'restricted', check if the
user is a member of the spaces defined in the 'allow' key of the join rules.

This only applies to an experimental room version, as defined in MSC3083.
2021-04-08 08:28:32 -04:00
Andrew Morgan
04819239ba
Add a Synapse Module for configuring presence update routing (#9491)
At the moment, if you'd like to share presence between local or remote users, those users must be sharing a room together. This isn't always the most convenient or useful situation though.

This PR adds a module to Synapse that will allow deployments to set up extra logic on where presence updates should be routed. The module must implement two methods, `get_users_for_states` and `get_interested_users`. These methods are given presence updates or user IDs and must return information that Synapse will use to grant passing presence updates around.

A method is additionally added to `ModuleApi` which allows triggering a set of users to receive the current, online presence information for all users they are considered interested in. This is the equivalent of that user receiving presence information during an initial sync. 

The goal of this module is to be fairly generic and useful for a variety of applications, with hard requirements being:

* Sending state for a specific set or all known users to a defined set of local and remote users.
* The ability to trigger an initial sync for specific users, so they receive all current state.
2021-04-06 14:38:30 +01:00