- Make it the same for Alice and Bob.
- Make it contain a wallet client instead of the `Monero` struct.
Also:
Remove `Container` from inside `Monero` struct. The caller of `new`
can simply ensure that `Container` is not dropped to keep the
container alive.
This makes the `Monero` struct easier to work with, as it just holds
the data necessary to create the different clients created during
`init`, and does not have any lifetime restrictions.
