How to use the key backup?

[MTRNord]

Hi I have seen you partially support the key backup. There are some questions I have on this especially coming from the-draupnir-project/Draupnir#608 which might be also an issue relevant to this sdk. (Also to clarify we are using this fork since mjolnir did):

• How is one meant to use signAndCreateKeyBackupVersion when there is no method to actually generate the required public key?
• Are there plans to add crosssigning? This will be required with invisible crypto and tulir suggested using the keybackup recovery key to do that
• Is there any way currently to read the key backup via the recovery key or is it only writing for now?
• How can I use secret storage for the backup key so I can make it compatible with other clients?