When someone give us their lightning address, I realized it is likely we will send sats to that same person again. Let's store the lightning addresses that we have sent money to by default in a contact list. With option to remove them in case we need to. But it would be nice to have a recurrent sender's contact list. This adds another social layer to the app. Having our friends on the list makes us feel more at home when we see them as contacts of our wallet.