Support all tracked sources for scanning utxo set and offer Get Addre…

[Kukks]

…sses API

[NicolasDorier]

The problem is that there should not be a method that just pull all the addresses. That will end up blowing up on big wallets.
It should be streamed via keyset pagination.

It should also be split in 2 PR, the first with only GetAddress. This is already a big thing by itself.

[NicolasDorier]

I think I already did the feedback on that, but writing it here, because I don't find it anymore:

If a group had a single derivation scheme, I would expect that scanning the group would be exactly the same thing as scanning the single derivation scheme.

However, this is not the case: The group will only scan the address that has been generated up to now, and will not attempt to scan beyond it.

Scanning a derivation scheme directly would try to find used addresses up to the max gap limit.