Fixes https://github.com/status-im/status-desktop/issues/12558
When getting kicked out of a community, before we used to leave the community completely, but just keep the filters on.
That created a problem when reopening the app, because the community disappeared and could even create a problem in desktop where it tried to open the last opened community but it's no longer there.
The fix now is that when getting kicked out, we instead just remove ourselves from the community and set Joined to false, but we keep the community spectated.
Which specifies that if a user is not a community member & a
chat member, he can't post, react or pin messages in that chat.
Notes:
- also fix&cleanup associated failing tests.
- refactor Community.CanPost() to reflect the new requirement.
- grant code is not fully implemented and is to be removed later.
Fixes https://github.com/status-im/status-desktop/issues/11915
This commit changes the format of the encryption id to be based off 3
things:
1) The group id
2) The timestamp
3) The actual key
Previously this was solely based on the timestamp and the group id, but
this might lead to conflicts. Moreover the format of the key was an
uint32 and so it would wrap periodically.
The migration is a bit tricky, so first we cleared the cache of keys,
that's easier than migrating, and second we set the new field hash_id to
the concatenation of group_id / key_id.
This might lead on some duplication in case keys are re-received, but it
should not have an impact on the correctness of the code.
I have added 2 tests covering compatibility between old/new clients, as
this should not be a breaking change.
It also adds a new message to rekey in a single go, instead of having to
send multiple messages
With the recent introduction of pending states, the community requests
logic became more complex. This commit simplifies the flow and
appropriately delegates logic to its corresponding abstraction levels:
messenger, manager and community. Additionally, it eliminates
redundancies in notifications and request-saving mechanism.
- use protected topics for communities
- associate chats to pubsub topics and populate these depending if the chat belongs to a community or not
- mailserver functions should be aware of pubsub topics
- generate private key for pubsub topic protection when creating a community
- add shard cluster and index to communities
- setup shards for existing communities
- distribute pubsubtopic password
- use protected topics for communities
- associate chats to pubsub topics and populate these depending if the chat belongs to a community or not
- mailserver functions should be aware of pubsub topics
- generate private key for pubsub topic protection when creating a community
- add shard cluster and index to communities
- setup shards for existing communities
- distribute pubsubtopic password
- fix: do not send the requests to join and cancel in the protected topic
- fix: undefined shard values for backward compatibility
- refactor: use shard message in protobuffers
* feat: introduce KickedPending state for community members
* feat: tests for ban/unban pending states
* fix: remove pending And banned members from public serialization
* feat: add check for banning and kicking privileged users
* fix: process only first event when obtaining PendingAndBannedMembers
* fix: review fixes
* fix: proper conditions for kicking and banning checks
* Fix: fix tests after rebase
New contracts and contract go functions.
Adjust owner&master tokens deployment flow.
Create deployment signature.
CommunityTokens API for handling signer pubkey.
Issue #11954
- share requests to join with new privileged roles during reevaluating member role
- share requests to join with new members, joined the community as TOKEN_MASTER, ADMIN
- share requests to join revealed addresses to ADMINS and TOKEN_MASTERS
- refactor common test functionality to make them more predictable
- removed unused CommunityToken protobuf
refactor: associate chats to pubsub topics and populate these depending if the chat belongs to a community or not
refactor: add pubsub topic to mailserver batches
chore: ensure default relay messages continue working as they should
refactor: mailserver functions should be aware of pubsub topics
fix: use []byte for communityIDs
interface for initializing db, which is implemented for appdatabase and
walletdatabase. TBD for multiaccounts DB.
Unified DB initializion for all tests using helpers and new interface.
Reduced sqlcipher kdf iterations for all tests to 1.
Adding new smart contracts and generated go files.
Deploy token owner function and master token address getter.
Adding deployer and privilegesLevel columns to community_tokens table.
Passing addressFrom to API calls.
Issue #11250
Fixes an issue where if a community had an admin permission, it would be impossible to join as a normal member because the admin permission wasn't satisfied.
Prior to this commit a control node would add the revealed addresses to
the member struct on the community description, which exposes all those
addresses to the public.
We don't want that. Revealed addresses are exclusively shared with
control nodes and should stay there (although, they might be privately
shared among token masters, see
https://github.com/status-im/status-desktop/issues/11610).
In this commit, we no longer add the revealed addresses to the community
description. The addresses are already stored in the requestToJoin
database table so we can take them from there if we need them.
Closes: https://github.com/status-im/status-desktop/issues/11573
This is a bigger change in how community membership requests are handled
among admins, token masters, owners, and control nodes.
Prior to this commit, all privileged users, also known as
`EventSenders`, were able to accept and reject community membership
requests and those changes would be applied by all users.
This commit changes this behaviour such that:
1. EventSenders can make a decision (accept, reject), but merely forward
their decision to the control node, which ultimately has to confirm
it
2. EventSenders are no longer removing or adding members to and from
communities
3. When an eventsender signaled a decision, the membership request will
enter a pending state (acceptedPending or rejectedPending)
4. Once a decision was made by one eventsender, no other eventsender can
override that decision
This implementation is covered with a bunch of tests:
- Ensure that decision made by event sender is shared with other event
senders
- `testAcceptMemberRequestToJoinResponseSharedWithOtherEventSenders()`
- `testRejectMemberRequestToJoinResponseSharedWithOtherEventSenders()`
- Ensure memebrship request stays pending, until control node has
confirmed decision by event senders
- `testAcceptMemberRequestToJoinNotConfirmedByControlNode()`
- `testRejectMemberRequestToJoinNotConfirmedByControlNode()`
- Ensure that decision made by event sender cannot be overriden by other
event senders
- `testEventSenderCannotOverrideRequestToJoinState()`
These test cases live in three test suites for different event sender
types respectively
- `OwnerWithoutCommunityKeyCommunityEventsSuite`
- `TokenMasterCommunityEventsSuite`
- `AdminCommunityEventsSuite`
In addition to the changes mentioned above, there's also a smaller
changes that ensures membership requests to *not* attached revealed wallet
addresses when the requests are sent to event senders (in addition to
control nodes).
Requests send to a control node will still include revealed addresses as
the control node needs them to verify token permissions.
This commit does not yet handle the case of event senders attempting to
kick and ban members.
Similar to accepting and rejecting membership requests, kicking and
banning need a new pending state. However, we don't track such state in
local databases yet so those two cases will be handled in future commit
to not have this commit grow larger.
- distribute ratchet keys at both community and channel levels
- use explicit `HashRatchetGroupID` in ecryption layer, instead of
inheriting `groupID` from `CommunityID`
- populate `HashRatchetGroupID` with `CommunityID+ChannelID` for
channels, and `CommunityID` for whole community
- hydrate channels with members; channel members are now subset of
community members
- include channel permissions in periodic permissions check
closes: status-im/status-desktop#10998
This component decouples key distribution from the Messenger, enhancing
code maintainability, extensibility and testability.
It also alleviates the need to impact all methods potentially affecting
encryption keys.
Moreover, it allows key distribution inspection for integration tests.
part of: status-im/status-desktop#10998
**This is a breaking change!**
Prior to this commit we had `AddCommunityToken(token *communities,
croppedImage CroppedImage)` that we used to
1. add a `CommunityToken` to the user's database and
2. to create a `CommunityTokenMetadata` from it which is then added to
the community's `CommunityDescription` and published to its members
However, I've then discovered that we need to separate these two things,
such that we can deploy a community token, then add it to the database
only for tracking purposes, **then** add it to the community description
(and propagate to members) once we know that the deploy tx indeed went
through.
To implement this, this commit introduces a new API
`SaveCommunityToken(token *communities.CommunityToken, croppedImage
CroppedImage)` which adds the token to the database only and doesn't
touch the community description.
The `AddCommunityToken` API is then changed that it's exclusively used
for adding an already saved `CommunityToken` to the community
description so it can be published to members. Hence, the signature is
now `AddCommunityToken(communityID string, chainID int, address
string)`, which makes this a breaking change.
Clients that used `AddCommunityToken()` before now need to ensure that
they first call `SaveCommunityToken()` as `AddCommunityToken()` will
fail otherwise.
* chore: make the owner without the community private key behave like an admin
* Add test for the owner without community key
* chore: refactor Community fn names related to the roles
- Fixed redundant permissions check. If community is set to auto-accept,
then permissions would be checked twice, in
`HandleCommunityRequestToJoin` and `AcceptRequestToJoinCommunity`.
Mitigated it by returning from `HandleCommunityRequestToJoin` immediately
in case of auto-accept.
- Extracted `accountsSatisfyPermissionsToJoin` to remove code
duplication and simplify the logic.
* feat: add api to remove private key and separete owner from private key ownership
For https://github.com/status-im/status-desktop/issues/11475
* feat: introduce IsControlNode for Community
* feat: remove community private key from syncing
* feat: add IsControlNode flag to Community json serialisation
* Update protocol/protobuf/pairing.proto
Co-authored-by: Jonathan Rainville <rainville.jonathan@gmail.com>
---------
Co-authored-by: Jonathan Rainville <rainville.jonathan@gmail.com>
* mute and unmute all community chats when community mute status changes
* unmute community when atleast one channel is unmuted
* fix: save community, extend the function to save muted state and mute duration
chore:
- add CommunityEventsMessage
- refactor community_admin_event to accept a list of events and patch a CommunityDescription
- save/read community events into/from database
- publish and handle community events message
- fixed admin category tests
- rename AdminEvent to Events or CommunityEvents
Adds airdropAddress to the request to join params and a is_airdrop_address flag in the communities_requests_to_join_revealed_addresses table.
This airdropAddress is used by the owner to know which address to use when airdropping
I have encountered a crash in the app after syncing, looks like a
community has been created without a Config.
This crashes the app after the user logs in.
This commit prevents the app from crashing, but does not fix the
underlaying issue (that's something I will have to investigate).
Added tests to validate the behavior.
Check community exists
Modify API to handle also ERC20 tokens.
Modify community_tokens table - keep supply as string since string is easly convertible to bigint.BigInt.
Use bigint.BigInt for supply functions and fields.
Issue #11129
This commit extends the `AddCommunityToken` API to also expect an
optional `CroppedImage`, which will be used instead of the `ImageBase64`
path provided by `CommunityToken`, to calculate the actual base64
encoded image.
* feat(share-links): Add protobuf and encode/decode url data methods
* feat(new-links-format): Adds generators for new links format
* feat: add parsing for new links format
* feat: add messenger-level pubkey serialization and tests
* feat: fix and test CreateCommunityURLWithChatKey
* feat: impl and test parseCommunityURLWithChatKey
* feat: fix and test CreateCommunityURLWithData
* feat: impl and test parseCommunityURLWithData (not working)
* feat: UrlDataResponse as response share urls api
* feat: impl& tested ShareCommunityChannelURLWithChatKey
* feat: impl & tested ParseCommunityChannelURLWithChatKey
* fix: bring urls to new format
* feat: add regexp for community channel urls
* feat: impl & test contact urls with chatKey, Ens and data
* fix: encodeDataURL/encodeDataURL patch from Samyoul
* fix: fix unmarshalling protobufs
* fix: fix minor issues, temporary comment TestParseUserURLWithENS
* fix: allow url to contain extra `#` in the signature
* fix: check signatures with SigToPub
* chore: lint fixes
* fix: encode the signature
* feat: Check provided channelID is Uuid
* fix(share-community-url): Remove if community encrypted scope
* fix: review fixes
* fix: use proto.Unmarshal instead of json.Marshal
* feat(share-urls): Adds TagsIndices to community data
* feat: support tag indices to community url data
---------
Co-authored-by: Boris Melnik <borismelnik@status.im>
- Add ERC20 contract
- Add decimals field to community_tokens db table
- Adjusting API to handle assets deployment
- Add decimals field to CommunityTokenMetadata
Issue #10987
There's only one scenario in which a `RevealedAccount` will have an
empty `ChainIDs` list attached to it:
When the community in question requires users to satisfy certain
criteria to join, and the user's wallet does not own the necessary funds
on any of the supported chains.
If there are **no** permissions to join on the community, then we want
to reveal all (selected) accounts with all supported chainIDs.
This is necessary so that, once the community *does* become
permissioned, it'll have address + chain information from all joined
members.
Closes: https://github.com/status-im/status-desktop/issues/11255
This commit adds new tables to the database and APIs in `Messenger` and
communities `Manager` to store `CheckChannelPermissionsResponse`s.
The responses are stored whenever channel permissions have been checked.
The reason we're doing this is so that clients can retrieve the last
known channel permission state before waiting for onchain checks to
finish.
This API is used to get a permission status of all channels of a given
community.
Clients can use this API to get the provided information for all
community channels with a single RPC call instead of doing one call
for each channel separately.
Similar to `CheckPermissionToJoin()` we now get
a `CheckChannelPermissions()` API.
It will rely on the same `PermissionResponse` types, but gives
information about both `ViewOnlyPermissions` and
`ViewAndPostPermissions`.
This seems to be a bug that was introduced when two features, admin
permissions and "always reveal wallet accounts" where merged.
We need to make sure we **first** check the revealed accounts and only
**then** do we perform permission checks on them. Otherwise we can run
into scenarios where fake addresses are used and users will be accepted
to the community.
found
Turns out that, when we return with an error, instead of
a non-statisfied check permissions response, we can run into cases where
members that should be kicked are not kicked.
Change smart contract with new API.
Update gas amount for deployment.
Add Burn() and EstimateBurn() functions.
Add RemainingSupply() functions.
Issue #10816
This commit does a few things:
- Adds a migration that adds chainids to communities_request_to_join_revealed_addresses
- Removes RevealedAddress in favor of RevealedAccount which is now a struct that contains the revealed address, as well as the signature and a list of chain IDs on which to check for user funds
- Changes the logic of sending requests to join a community, such that after creating address signatures, the user node will also check which of the addresses has funds on which networks for the community's token permissions, and add the chainds to the RevealedAccount
- Updates checkPermissionToJoin() such that only relevant chainids are used when checking user's funds. Chain IDs are retrieved from RevealedAccounts and matched against token permission criteria chain IDs
* chore(upgradeSQLCipher): Upgrading SQLCipher to version 5.4.5
Changes:
### github.com/mutecomm/go-sqlcipher
1. The improved crypto argorighms from go-sqlcipher v3 are merged in v4
Tags:
v4.4.2-status.1 - merge `burn_stack` improvement
v4.4.2-status.2 - merge `SHA1` improvement
v4.4.2-status.4- merge 'AES' improvement
2. Fixed `go-sqlcipher` to support v3 database in compatibility mode (`sqlcipher` already supports this) (Tag: v4.4.2-status.3)
3. Upgrade `sqlcipher` to v5.4.5 (Tag: v4.5.4-status.1)
### github.com/status-im/migrate/v4
1. Upgrade `go-sqlcipher` version in `github.com/status-im/migrate/v4`
### status-go
1. Upgrade `go-sqlcipher` and `migrate` modules in status-go
2. Configure the DB connections to open the DB in v3 compatibility mode
* chore(upgradeSQLCipher): Use sqlcipher v3 configuration to encrypt a plain text database
* chore(upgradeSQLCipher): Scanning NULL BLOB value should return nil
Fixing failing tests: TestSyncDeviceSuite/TestPairingSyncDeviceClientAsReceiver; TestSyncDeviceSuite/TestPairingSyncDeviceClientAsSender
Considering the following configuration:
1. Table with BLOB column has 1 NULL value
2. Query the value
3. Rows.Scan(&dest sql.NullString)
Expected: dest.Valid == false; dest.String == nil
Actual: dest.Valid == true; dest.String == ""
* chore: Bump go-sqlcipher version to include NULL BLOB fix
* fix(community): stop re-joining comm when receiving a sync community msg
Fixes an issue with chats being reset. Since joining a community resaves the chats with the synced default value, it resets the sate of the chats, losing the unread messages, the muted state and more.
The solution is to block the re-joining of the community. In the case of the sync, we catch that error and just continue on.
* fix(import): fix HandleImport not saving the chat
Doesn't change much, but it could have caused issues in the future, so since we might have modified the chat, we make sure to save them
Also adds a test
* fix tests
This commit does a few things:
1) Extend create/import account endpoint to get wallet config, some of
which has been moved to the backend
2) Set up a loop for retrieving balances every 10 minutes, caching the
balances
3) Return information about which checks are not passing when trying to
join a token gated community
4) Add tests to the token gated communities
5) Fixes an issue with addresses not matching when checking for
permissions
The move to the wallet as a background task is not yet complete, I need
to publish a signal, and most likely I will disable it before merging
for now, as it's currently not used by desktop/mobile, but the PR was
getting to big
* Community request to join changes
* Fix read state for request to join notification
* Bring back deleted notification when updated with response
* Update Request timeout to 7 days
* Update VERSION
This adds an additional check for collectibles when community
permissions are validated.
Specifically this uses opensea to request all NFTs given an
owner wallet and a list of contract addresses (collectibles).
When community owners accept pending requests manually, they would be
declined in that process if the request doesn't fullfill the required
token permission criteria.
We don't want this to automatically reject those requests anymore,
instead, owners have to manually reject the requests.
When a community permission is edited, we need to revalidate
the token criteria with the existing member list, as members might
no longer fulfill the requirements.
This commit runs the checks in a go routine after the permission has
been updated.
This adds checks to `HandleCommunityRequestToJoin` and
`AcceptRequestToJoinCommunity` that ensure a given user's revealed
wallet addresses own the token funds required by a community.
When community has token permissions of type `BECOME_MEMBER`, the
following happens when the owner receives a request:
1. Upon verifying provided wallet addresses by the requester, the owner
node accumulates all token funds related to the given wallets that
match the token criteria in the configured permissions
2. If the requester does not meet the necessary requirements, the
request to join will be declined. If the requester does have the
funds, he'll either be automatically accepted to the community, or
enters the next stage where an owner needs to manually accept the
request.
3. The the community does not automatically accept users, then the funds
check will happen again, when the owner tries to manually accept the
request. If the necessary funds do not exist at this stage, the
request will be declined
4. Upon accepting, whether automatically or manually, the owner adds the
requester's wallet addresses to the `CommunityDescription`, such that
they can be retrieved later when doing periodic checks or when
permissions have changed.
This commit extends the `CommunityRequestToJoin` with `RevealedAddresses` which represent wallet addresses and signatures provided by the sender, to proof a community owner ownership of those wallet addresses.
**Note: This only works with keystore files maanged by status-go**
At high level, the follwing happens:
1. User instructs Status to send a request to join to a community. By adding a password hash to the instruction, Status will try to unlock the users keystore and verify each wallet account.
2. For every verified wallet account, a signature is created for the following payload, using each wallet's private key
``` keccak256(chatkey + communityID + requestToJoinID) ``` A map of walletAddress->signature is then attached to the community request to join, which will be sent to the community owner
3. The owner node receives the request, and if the community requires users to hold tokens to become a member, it will check and verify whether the given wallet addresses are indeed owned by the sender. If any signature provided by the request cannot be recovered, the request is immediately declined by the owner.
4. The verified addresses are then added to the owner node's database such that, once the request should be accepted, the addresses can be used to check on chain whether they own the necessary funds to fulfill the community's permissions
The checking of required funds is **not** part of this commit. It will be added in a follow-up commit.
The `Edit()` method on `Community` merely updates "primitive" values
that live inside a community description. For any data that is more complex,
we typically have dedicated methods.
Because `Edit()` was expecting `CommunityTokensMetadata`, it would
override it with empty data every time we would edit a community.
This is because we typically don't update that kind of data as part
of `Edit()`.
In addition, `CommunityTokensMetadata` is append-only anyways,
so there wouldn't be any other way to update that field, other than
adding new items to it, which is done in a dedicated method.
Community tokens has some metadata (image, description) which must be kept in waku(CommunityDescription).
Add CommunityTokenMetadata message to communities.proto.
Add []CommunityTokenMetadata to CommunityDescription.
Issue #9545
In general, any time a piece of state is updated in the backend, that
should be propagated to the client through signals.
In this case, when a request was accepted, the client wasn't notified,
requiring them to re-fetch the accepted requests and causing
inconsistent state between status-go and client.
This commit refactors the discord import tool such that,
instead of loading all data to be imported into memory at
once, it will now perform the import on a per file basis.
This improves the memory pressure for the node performing
the import and seems to increase its performance as well.
There were cases where this caused a crash, as handling magnetlinks would try to close
an already closed tasked channel
See https://github.com/status-im/status-desktop/issues/8996 for more information.
This commit extends the task struct such that it can be marked as cancelled and safely
read and written by multiple go routines.
This introduces an addition constraint to archive generation, in which the payload + signature size of all partitioned message that go into an archive should not exceed a certain
threshold.
This is to ensure that archives won't get too big when they are later read into memory.
Instead of loading the entire torrent file into memory when trying
to extrract active messages, we now only read the chunks that are
necessary to decode any individual archive and then process
extracted messages in chunks.
This doesn't introduce a max cap of allowed memory yet, since the
chunk size depends entirely on the size of the archive, but this
will be done soon.
This commit makes a few changes to the community history archive
download routine to make it more robust:
1. Prior to this commit, even when there were no archives to be
downloaded, we were still trying to extract messages from archive
data.
2. Logs have been improved as they were sometimes showing confusing
information
3. We now handle interruption of ongoing download + data import much
better in case of multiple magnetlinks being processed in roughly the
same time.
4. We now keep track of which archive has been successfully imported
into the database. Without this, Status would consider any downloaded
archives as "done" even though they haven't actually been imported
into the database yet. This way Status should be able to pick up its
work were it left of the last time, in case a user closes the app, or
another magnetlink interrupts the ongoing process.
In order to give clients more insights about archive messages being
processed, we're adding this additional signal that informs clients when
the import of downloaded history archive messages has started.
* feat(ActivityCenter): Add community request AC notification
* feat(ActivityCenter): Add CommunityID to AC notification
* feat(ActivityCenter): Add membership status for community membership AC notifications
* feat(ActivityCenter): Add tests for community notifications and fix naming
* Add notification for kicked from community action
* feat(ActivityCenter): Fix for missing notification objects for tests
Prior to this commit we had a `CreateHistoryArchiveTorrent()` API which
takes a `startDate`, an `endDate` and a `partition` to create a bunch of
message archives, given a certain time range.
The function expects the messages to live in the database, which means,
all messages that need to be archived have to be saved there at some
point.
This turns out to be an issue when importing communities from third
party services, where, sometimes, there are several thousands of messages
including attachment payloads, that have to be save to the database
first.
There are only two options to get the messages into the database:
1. Make one write operation with all messages - this slow, takes a long
time and blocks the database until done
2. Create message chunks and perform multiple write operations - this is
also slow, takes long but makes the database a bit more responsive as
it's many smaller operations instead of one big one
Option 2) turned out to not be super feasible either as sometimes,
inserting even a single such message can take up to 10 seconds
(depending on payload)
Which brings me to the third option.
**A third option** is to not store those imported messages as waku
message into the database, just to later query them again to create the
archives, but instead create the archives right away from all the
messages that have been loaded into memory.
This is significantly faster and doesn't block the database.
To make this possible, this commit introduces
a `CreateHistoryArchiveTorrentFromMessages()` API, and
a `CreateHistoryArchiveTorrentFromDB()` API which can be used for
different use cases.
settings
Turns out `UpdateCommunitySettings()` has never worked. Two parameters
where in the wrong order, cause the SQL statement to never find the row
it has to update.
When fetching torrent info after receiving a magnet link,
it can happen that the request times out.
We want to retry downloading the data again at least once more
before giving up
The default logger writes to `geth.log`, which makes debugging
the archive protocol pretty hard.
This adds an additional logger that logs to stdout, while keeping
the default logger intact for production.
- added `SpectateCommunity` endpoint, it is supposed to be used in
scenarios where we want to "Go to public Community" and see its
content without joining
- added `spectated` field to `Community`, it means we are observing the
community and its chats but we are not members
Use case:
https://github.com/status-im/status-desktop/issues/7072#issuecomment-1246560885
Usually, message IDs are generated by their payload and signature and
in receiving nodes calculated in based on the same data as well.
There's no ID attached to messages in-flight.
This turns out to be a bit of a problem for messages that are being
imported from third party systems like discord, as the conversion
and saving of such messages and handling of their possible assets and
attachments are done in separate steps, which changes the message
payloads after their IDs have been generated.
Hence, we're introducing a `ThirdPartyID` property to `common.Message`
and `protobuf.WakuMessage` so receiving nodes of such messages (via the
archive protocol primarily) can easily detect third party/imported
messages and give them special treatment.
This might look like a weird requirement at a fist glance.
The reason this is needed, is because some message signals require
admin rights to take effect (e.g. PinMessage).
When messages are imported from third-party services,
translated to status messages, signed by the community, and eventually distributed
via the archive protocol, we need to ensure that messages signed
by the community itself are considered as admin privileges as well,
so they can be correctly replayed into the database.
This adds a new `DownloadingHistoryArchivesFinished` signal to the
family of community archive signals. It's emitted when all to be
downloaded archives have been downloaded and handled.