I'd hope we can reuse the encrypted "vault" that we use for syncing send wallet creds, but there's a lot more state in these protocols and having one key to retrieve it all may defeat their purpose.
It's perhaps naive but I was thinking we would hold the messaging keys in this vault as a backup of whatever we store on the device. Then there's at least some redundancy if the vault needs to be reset or the device gets wiped.
I'd hope we can reuse the encrypted "vault" that we use for syncing send wallet creds, but there's a lot more state in these protocols and having one key to retrieve it all may defeat their purpose.