A few years ago, I created an electrum wallet on a desktop machine with version 1.8.1.
For reasons I won't go into here, I am now limited to the android client for the foreseeable future (and beyond).
I need to sign a message (not a transaction) with the private key associated with a specific bitcoin address in that wallet.
Two questions:
1. Is there any way of doing that?
2. If not, how do I export the private key into another wallet client, so I can sign a message with it?
I can miss the obvious sometimes, but I didn't see any way of doing either of these things.
Electrum client for Android doesn't have the feature to signed a message with your address, you can do it only on Desktop version of electrum, but if you are an android user I will suggest that use Mycelium mobile wallet, it does have the feature to signed message on any wallet address there, the one you created which is HD wallet and even the imported one but not the watched address.