I am trying to run an app that summarize my holding across multiple blockchains... therefore, instead of remembering many addresses for electrum (receiving and change addresses) I was wondering if I could somehow only have one for wallet...
I agree with you that the GUI does that for me, but I need to have a dashboard with BTC holding, ETH holding etc... I need to be able to get all the info from somewhere...
if you already have the wallets installed and they are synced then you can easily read the wallet file itself. it is a simple JSON file for Electrum and it contains your addresses, private keys, public keys, seed, transaction history and lots more. you can create a test wallet (on testnet) and receive/send 1 tx and then open the wallet file in a text editor to see its content. then simply write your app to read that data.