This changes the JSON-RPC APIs to get a QR code from the backup
provider to block. It means once you have a (blocking) call to
provide_backup() you can call get_backup_qr() or get_backup_qr_svg()
and they will block until the QR code is available.
Calling get_backup_qr() or get_backup_qr_svg() when there is no backup
provider will immediately error.
Desktop does use this as it allows reading QR codes as text from the
clipboard as well as copying the QR text to the clipboard instead of
showing the QR code.
This also removes BackupProvider::join in favour of implementing
Future directly. I wondered about implementing a FusedFutre to make
this a little safer but it would introduce a dependency on the futures
crate in deltachat-ffi which did not exist yet, so I didn't do that.
the axum update broke the websocket server, because yerpc still uses a the old 5.9 version.
So I needed to downgrade the dependency until https://github.com/deltachat/yerpc/pull/35 is merged.
I want to retry the kaiOS client experiment, for this I need a working websocket server binary.
* jsonrpc: `get_messages` now returns a map with `MessageLoadResult`
instead of failing completely if one of the requested messages could not be loaded.
* add pr number to changelog
* format errors with causes instead of debug output
also for chatlistitemfetchresult
get_chat_msgs() function is split into new get_chat_msgs() without flags
and get_chat_msgs_ex() which accepts booleans instead of bitflags.
FFI call dc_get_chat_msgs() is still using bitflags for compatibility.
JSON-RPC calls get_message_ids() and get_message_list_items()
accept booleans instead of bitflags now.
This adds functionality to send and receive a backup over the network
using a QR code.
The sender or provider prepares the backup, sets up a server that
waits for clients. It provides a ticket in the form of a QR code
which contains connection and authentication information.
The receiver uses the QR code to connect to the provider and fetches
backup, restoring it locally.
