That is great. My app is going to be open source and if you want I can test it in alpha mode. It will make a good example of accessing the memo private key.

Anyway I will start with a custom_json scope on SC and a dummy memo private key.

Do you know where to get the encryption function? I had a look at SteemJS and now looking at dSteem, which looks more suited for that but a bit stuck at the moment...