* feat: proposal for collecting community metrics
https://github.com/status-im/status-desktop/issues/11152
* feat: collecting community message metrics with test
* feat: implement both strategies for fetching community metrics
* fix: review fixes
* fix: calc counts for timestamps
**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.
* 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
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>
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`.
Change smart contract with new API.
Update gas amount for deployment.
Add Burn() and EstimateBurn() functions.
Add RemainingSupply() functions.
Issue #10816
fix flaky test: TestRetrieveBlockedContact
resolve conflict when rebase origin/develop
Feat/sync activity center notification (#3581)
* feat: sync activity center notification
* add test
* fix lint issue
* fix failed test
* addressed feedback from sale
* fix failed test
* addressed feedback from ilmotta
go generate ./protocol/migrations/sqlite/...
feat: add updated_at for syncing activity center notification
* 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
This is the initial implementation for the new URL unfurling requirements. The
most important one is that only the message sender will pay the privacy cost for
unfurling and extracting metadata from websites. Once the message is sent, the
unfurled data will be stored at the protocol level and receivers will just
profit and happily decode the metadata to render it.
Further development of this URL unfurling capability will be mostly guided by
issues created on clients. For the moment in status-mobile:
https://github.com/status-im/status-mobile/labels/url-preview
- https://github.com/status-im/status-mobile/issues/15918
- https://github.com/status-im/status-mobile/issues/15917
- https://github.com/status-im/status-mobile/issues/15910
- https://github.com/status-im/status-mobile/issues/15909
- https://github.com/status-im/status-mobile/issues/15908
- https://github.com/status-im/status-mobile/issues/15906
- https://github.com/status-im/status-mobile/issues/15905
### Terminology
In the code, I've tried to stick to the word "unfurl URL" to really mean the
process of extracting metadata from a website, sort of lower level. I use "link
preview" to mean a higher level structure which is enriched by unfurled data.
"link preview" is also how designers refer to it.
### User flows
1. Carol needs to see link previews while typing in the chat input field. Notice
from the diagram nothing is persisted and that status-go endpoints are
essentially stateless.
```
#+begin_src plantuml :results verbatim
Client->>Server: Call wakuext_getTextURLs
Server-->>Client: Normalized URLs
Client->>Client: Render cached unfurled URLs
Client->>Server: Unfurl non-cached URLs.\nCall wakuext_unfurlURLs
Server->>Website: Fetch metadata
Website-->>Server: Metadata (thumbnail URL, title, etc)
Server->>Website: Fetch thumbnail
Server->>Website: Fetch favicon
Website-->>Server: Favicon bytes
Website-->>Server: Thumbnail bytes
Server->>Server: Decode & process images
Server-->>Client: Unfurled data (thumbnail data URI, etc)
#+end_src
```
```
,------. ,------. ,-------.
|Client| |Server| |Website|
`--+---' `--+---' `---+---'
| Call wakuext_getTextURLs | |
| ---------------------------------------> |
| | |
| Normalized URLs | |
| <- - - - - - - - - - - - - - - - - - - - |
| | |
|----. | |
| | Render cached unfurled URLs | |
|<---' | |
| | |
| Unfurl non-cached URLs. | |
| Call wakuext_unfurlURLs | |
| ---------------------------------------> |
| | |
| | Fetch metadata |
| | ------------------------------------>
| | |
| | Metadata (thumbnail URL, title, etc)|
| | <- - - - - - - - - - - - - - - - - -
| | |
| | Fetch thumbnail |
| | ------------------------------------>
| | |
| | Fetch favicon |
| | ------------------------------------>
| | |
| | Favicon bytes |
| | <- - - - - - - - - - - - - - - - - -
| | |
| | Thumbnail bytes |
| | <- - - - - - - - - - - - - - - - - -
| | |
| |----. |
| | | Decode & process images |
| |<---' |
| | |
| Unfurled data (thumbnail data URI, etc)| |
| <- - - - - - - - - - - - - - - - - - - - |
,--+---. ,--+---. ,---+---.
|Client| |Server| |Website|
`------' `------' `-------'
```
2. Carol sends the text message with link previews in the RPC request
wakuext_sendChatMessages. status-go assumes the link previews are good
because it can't and shouldn't attempt to re-unfurl them.
```
#+begin_src plantuml :results verbatim
Client->>Server: Call wakuext_sendChatMessages
Server->>Server: Transform link previews to\nbe proto-marshalled
Server->DB: Write link previews serialized as JSON
Server-->>Client: Updated message response
#+end_src
```
```
,------. ,------. ,--.
|Client| |Server| |DB|
`--+---' `--+---' `+-'
| Call wakuext_sendChatMessages| |
| -----------------------------> |
| | |
| |----. |
| | | Transform link previews to |
| |<---' be proto-marshalled |
| | |
| | |
| | Write link previews serialized as JSON|
| | -------------------------------------->
| | |
| Updated message response | |
| <- - - - - - - - - - - - - - - |
,--+---. ,--+---. ,+-.
|Client| |Server| |DB|
`------' `------' `--'
```
3. The message was sent over waku and persisted locally in Carol's device. She
should now see the link previews in the chat history. There can be many link
previews shared by other chat members, therefore it is important to serve the
assets via the media server to avoid overloading the ReactNative bridge with
lots of big JSON payloads containing base64 encoded data URIs (maybe this
concern is meaningless for desktop). When a client is rendering messages with
link previews, they will have the field linkPreviews, and the thumbnail URL
will point to the local media server.
```
#+begin_src plantuml :results verbatim
Client->>Server: GET /link-preview/thumbnail (media server)
Server->>DB: Read from user_messages.unfurled_links
Server->Server: Unmarshal JSON
Server-->>Client: HTTP Content-Type: image/jpeg/etc
#+end_src
```
```
,------. ,------. ,--.
|Client| |Server| |DB|
`--+---' `--+---' `+-'
| GET /link-preview/thumbnail (media server)| |
| ------------------------------------------> |
| | |
| | Read from user_messages.unfurled_links|
| | -------------------------------------->
| | |
| |----. |
| | | Unmarshal JSON |
| |<---' |
| | |
| HTTP Content-Type: image/jpeg/etc | |
| <- - - - - - - - - - - - - - - - - - - - - |
,--+---. ,--+---. ,+-.
|Client| |Server| |DB|
`------' `------' `--'
```
### Some limitations of the current implementation
The following points will become separate issues in status-go that I'll work on
over the next couple weeks. In no order of importance:
- Improve how multiple links are fetched; retries on failure and testing how
unfurling behaves around the timeout limits (deterministically, not by making
real HTTP calls as I did). https://github.com/status-im/status-go/issues/3498
- Unfurl favicons and store them in the protobuf too.
- For this PR, I added unfurling support only for websites with OpenGraph
https://ogp.me/ meta tags. Other unfurlers will be implemented on demand. The
next one will probably be for oEmbed https://oembed.com/, the protocol
supported by YouTube, for example.
- Resize and/or compress thumbnails (and favicons). Often times, thumbnails are
huge for the purposes of link previews. There is already support for
compressing JPEGs in status-go, but I prefer to work with compression in a
separate PR because I'd like to also solve the problem for PNGs (probably
convert them to JPEGs, plus compress them). This would be a safe choice for
thumbnails, favicons not so much because transparency is desirable.
- Editing messages is not yet supported.
- I haven't coded any artificial limit on the number of previews or on the size
of the thumbnail payload. This will be done in a separate issue. I have heard
the ideal solution may be to split messages into smaller chunks of ~125 KiB
because of libp2p, but that might be too complicated at this stage of the
product (?).
- Link preview deletion.
- For the moment, OpenGraph metadata is extracted by requesting data for the
English language (and fallback to whatever is available). In the future, we'll
want to unfurl by respecting the user's local device language. Some websites,
like GoDaddy, are already localized based on the device's IP, but many aren't.
- The website's description text should be limited by a certain number of
characters, especially because it's outside our control. Exactly how much has
not been decided yet, so it'll be done separately.
- URL normalization can be tricky, so I implemented only the basics to help with
caching. For example, the url https://status.im and HTTPS://status.im are
considered identical. Also, a URL is considered valid for unfurling if its TLD
exists according to publicsuffix.EffectiveTLDPlusOne. This was essential,
otherwise the default Go url.Parse approach would consider many invalid URLs
valid, and thus the server would waste resources trying to unfurl the
unfurleable.
### Other requirements
- If the message is edited, the link previews should reflect the edited text,
not the original one. This has been aligned with the design team as well.
- If the website's thumbnail or the favicon can't be fetched, just ignore them.
The only mandatory piece of metadata is the website's title and URL.
- Link previews in clients should be generated in near real-time, that is, as
the user types, previews are updated. In mobile this performs very well, and
it's what other clients like WhatsApp, Telegram, and Facebook do.
### Decisions
- While the user typing in the input field, the client is constantly (debounced)
asking status-go to parse the text and extract normalized URLs and then the
client checks if they're already in its in-memory cache. If they are, no RPC
call is made. I chose this approach to achieve the best possible performance
in mobile and avoid the whole RPC overhead, since the chat experience is
already not smooth enough. The mobile client uses URLs as cache keys in a
hashmap, i.e. if the key is present, it means the preview is readily available
(naive, but good enough for now). This decision also gave me more flexibility
to find the best UX at this stage of the feature.
- Due to the requirement that users should be able to see independent loading
indicators for each link preview, when status-go can't unfurl a URL, it
doesn't return it in the response.
- As an initial implementation, I added the BLOB column unfurled_links to the
user_messages table. The preview data is then serialized as JSON before being
stored in this column. I felt that creating a separate table and the related
code for this initial PR would be inconvenient. Is that reasonable to you?
Once things stabilize I can create a proper table if we want to avoid this
kind of solution with serialized columns.
* fix mobile mention issue #15616
* add state != nil
* clear previous text when clear mentions
* fix: after selected mention user, and type @ not working
* bump version
* 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
- Display name is now backed up only as a part of `protobuf.BackedUpProfile` message,
it is not backed up via `protobuf.SyncSetting` any more (this refers only to backing up to
and fetching data from waku, regular syncing (among devices) remains unchanged)
- When saving the display name fetched from waku, before a clock was set to the current
time when that operation is made, which was incorrect, now we're using the clock from
backed up message (`SaveSyncDisplayName` function)
prefixes. Changed primary keys and API methods.
Fixed tests and added new ones.
Fixed saved addresses and transaction tests to use ':memory:' sqlite
DB instead of a tmp file to speed up testing by hundred of times.
Fixes#8599
* feat: refactor activity center endpoints
* fix: restore activity center tests using new endpoints
* feat: Remove from activity center endpoints accepted flag
* feat: Activity Center review fixes
Adds a new column named `deleted` to the table `activity_center_notifications`.
Related PR in Mobile https://github.com/status-im/status-mobile/pull/15106 for a lot more details of the feature.
Why? Relying on the `dismissed` column for soft deletion is no longer viable because the mobile & desktop clients should display dismissed notifications (sometimes), hence the need for a new column to truly represent soft deletion.
* feat: add fetching notifications by activity center group
* feat: add api for counting notifications by activity center group
* chore: activity center query code refactor
* feat: add endpoint returning ActivityCenterType(s) by ActivityCenterGroup
* chore: Remove activityGroup from status-go level
* feat: add endpoint for counting notifications with different conditions
* chore: upgrade go-waku to v0.5
* chore: add println and logs to check what's being stored in the enr, and preemptively delete the multiaddr field (#3219)
* feat: add wakuv2 test (#3218)
* Outgoing contact requests
* Test fix
* Test fix
* Fixes
* Bugfixes
* Bugfixes
* Almost there
* Removed the activity center notification
* Test update
* Almost ready
* Fixes
* Fixes
* feat: Add seen/unseen activity center state
* feat: ActivityCenterState for grouping ActivityCenter unread messages cnt and seen state
* feat: always use messenger's addActivityCenterNotification & add state to the response
* Remove unused activity center endpoints form api and fix test
Summary
=======
- [x] Changes endpoint ActivityCenterNotificationsBy to support fetching
multiple types of notification in a single query.
- [x] Adds endpoint UnreadAndAcceptedActivityCenterNotificationsCount to
allow the mobile client to fetch the count of unread & accepted
notifications.
- [x] Add `golangci-lint` to Nix shell. This was possible since PR
https://github.com/status-im/status-go/pull/3087 was merged.
Notes
=====
- If you'd like to understand why these changes are needed, please see
the mobile PR https://github.com/status-im/status-mobile/pull/14785,
or issue https://github.com/status-im/status-mobile/issues/14712
- All changes should be completely backwards compatible, and there
should be no impact for the desktop app.
- The mobile client has been already tested using this branch.
Changes applied here introduce backing up profile data (display name and identity
images) to waku and fetch them from waku. Information about those data is sent
as a separate signal to a client via `sync.from.waku.profile` signal.
New signal `sync.from.waku.progress` is introduced which will be used to notify a client
about the progress of fetching data from waku.
* 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
Main changes:
- Extend saved addresses DB with sync info: sync timestamp, update timestamp
and soft removed flag
- Create custom protobuf message payload to sync saved addresses
- Cleanup saved addresses on each start of messenger, by deleting
soft removed older entries
- Sync all saved addresses on Messenger.SyncDevices calls
- Sync particular changes to saved addresses
- Add SavedAddressManager instance to messenger
- Note, can't find a clean way to pass the SavedAddressManager to the
messenger, so we create another one
- Add tests for sync and new DB API
Closes: #7229
- 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
As part of the new Discord <-> Status Community Import functionality,
we're adding an API that extracts all discord categories and channels
from a previously exported discord export file.
These APIs can be used in clients to show the user what categories and
channels will be imported later on.
There are two APIs:
1. `Messenger.ExtractDiscordCategoriesAndChannels(filesToimport
[]string) (*MessengerResponse, map[string]*discord.ImportError)`
This takes a list of exported discord export (JSON) files (typically one per
channel), reads them, and extracts the categories and channels into
dedicated data structures (`[]DiscordChannel` and `[]DiscordCategory`)
It also returns the oldest message timestamp found in all extracted
channels.
The API is synchronous and returns the extracted data as
a `*MessengerResponse`. This allows to make the API available
status-go's RPC interface.
The error case is a `map[string]*discord.ImportError` where each key
is a file path of a JSON file that we tried to extract data from, and
the value a `discord.ImportError` which holds an error message and an
error code, allowing for distinguishing between "critical" errors and
"non-critical" errors.
2. `Messenger.RequestExtractDiscordCategoriesAndChannels(filesToImport
[]string)`
This is the asynchronous counterpart to
`ExtractDiscordCategoriesAndChannels`. The reason this API has been
added is because discord servers can have a lot of message and
channel data, which causes `ExtractDiscordCategoriesAndChannels` to
block the thread for too long, making apps potentially feel like they
are stuck.
This API runs inside a go routine, eventually calls
`ExtractDiscordCategoriesAndChannels`, and then emits a newly
introduced `DiscordCategoriesAndChannelsExtractedSignal` that clients
can react to.
Failure of extraction has to be determined by the
`discord.ImportErrors` emitted by the signal.
**A note about exported discord history files**
We expect users to export their discord histories via the
[DiscordChatExporter](https://github.com/Tyrrrz/DiscordChatExporter/wiki/GUI%2C-CLI-and-Formats-explained#exportguild)
tool. The tool allows to export the data in different formats, such as
JSON, HTML and CSV.
We expect users to have their data exported as JSON.
Closes: https://github.com/status-im/status-desktop/issues/6690
This introduces a flag to configure whether `Messenger.CreateCommunity`
should create a default channel.
As discussed in https://github.com/status-im/status-go/issues/2758, this
is needed for the upcoming functionality to import discord communities.
Closes#2758
fix: add verification request to response
fix: code review
add missing functions and simplify timestamp usage
fix: sync verification requests
feat: add endpoint to fetch all received verification requests
feat: add signal when trusting verification request
Co-authored-by: Jonathan Rainville <rainville.jonathan@gmail.com>
These APIs are being introduced to address #2706 and #2704, provided
that clients will move to using these APIs instead of the currently
provided equivalent APIs in the browser service.
The `bookmarks` table is being extended with a `deleted_at` field which
can later be used for garbage collection, as "removing" a bookmark is
merely soft deletion and doesn't actually remove the data from the
database.
In addition to those APIs adding and soft deleting bookmark entries,
they also automatically perform a sync operation to ensure that
bookmarks are synced in real-time (#2704).
Closes#2706, #2704
This introduces logic needed to:
- Create WakuMessageArchives and and indices from store waku messages
- History archive torrent data to disk and create .torrent file from
that
- Seed and unseed history archive torrents as necessary
- Starting/stopping the torrent client
- Enabling/disabling community history support for individual components
and starting/stopping the routine intervals accordingly
This does not yet handle magnet links (#2568)
Closes#2567
* Sync Settings
* Added valueHandlers and Database singleton
Some issues remain, need a way to comparing incoming sql.DB to check if the connection is to a different file or not. Maybe make singleton instance per filename
* Added functionality to check the sqlite filename
* Refactor of Database.SaveSyncSettings to be used as a handler
* Implemented inteface for setting sync protobuf factories
* Refactored and completed adhoc send setting sync
* Tidying up
* Immutability refactor
* Refactor settings into dedicated package
* Breakout structs
* Tidy up
* Refactor of bulk settings sync
* Bug fixes
* Addressing feedback
* Fix code dropped during rebase
* Fix for db closed
* Fix for node config related crashes
* Provisional fix for type assertion - issue 2
* Adding robust type assertion checks
* Partial fix for null literal db storage and json encoding
* Fix for passively handling nil sql.DB, and checking if elem has len and if len is 0
* Added test for preferred name behaviour
* Adding saved sync settings to MessengerResponse
* Completed granular initial sync and clock from network on save
* add Settings to isEmpty
* Refactor of protobufs, partially done
* Added syncSetting receiver handling, some bug fixes
* Fix for sticker packs
* Implement inactive flag on sync protobuf factory
* Refactor of types and structs
* Added SettingField.CanSync functionality
* Addressing rebase artifact
* Refactor of Setting SELECT queries
* Refactor of string return queries
* VERSION bump and migration index bump
* Deactiveate Sync Settings
* Deactiveated preferred_name and send_status_updates
Co-authored-by: Andrea Maria Piana <andrea.maria.piana@gmail.com>
These are used to store settings for individual communities a
user is part of, either as member or as owner.
This included whether or not the community history archive protocol
is enabled.
This adds a new `CommunitySettings` type and adds
a migration script that introduces a new `communities_settings`
table.
It also extends the `MessengerResponse` type to include
`CommunitySettings` which are honored when communities are being
added, edited, joined or left.
Lastly, this adds a new RPC API to retreive the settings.
Closes#2564
This commit enables mailserver cycle logic by default and make a few
changes:
1) Nodes are graylisted instead of being blacklisted for a set amount of
time. The reason is that if we blacklist, any cut in connectivity
might result in long delays before reconnecting, especially on spotty
connections.
2) Fixes an issue on the devp2p server, whereby the node would not
connect to one of the static nodes since all the connection slots
where filled. The fix is a bit inelegant, it always connects to
static nodes, ignoring maxpeers, but it's tricky to get it to work
since the code is clearly not written to select a specific node.
3) Adds support to pinned mailservers
4) Add retries to mailservers requests. It uses a closure for now, I
think we should eventually have a channel etc, but I'd leave that for
later.