Add custom account numbers

[Koenig-Johannes]

Would be grate to add custom account numbers

m/44'/1237'/1'/0
m/44'/1237'/2'/0
....

So there is only one backup needed for multiple keys.

[jaonoctus]

@Koenig-Johannes Perfect. When I wrote this, the spec was m/44'/1237'/0'/0/0

Now it is m/44'/1237'/<account>'/0/0.

I can add a number input to the app to change the account. WDYT?

[Koenig-Johannes]

I actually did a little bit of research, and I'm not sure if it's still necessary. I thought it would be ideal to have one seed and use it for multiple keys so that we only need one backup. I believe this will be relevant in the future, as we may need to switch keys for different purposes, or keys may become compromised.

As far as I understand, it's not possible to verify different accounts with one keyphrase in case one is lost. Therefore, I think it's better to use Bip-85 Child seeds for this purpose. With this setup, we can use hardware wallets like Seedsigner or Coldcard to create the key, save it on paper, and only dispose of child seeds to this tool using Tails on an air-gapped PC, for example.