Hello,
The plugin is backend-agnostic, meaning it works the same with all adapters, whether full node or not.
The admin can require that all transactions must be confirmed by the admin. You can turn this on or off separately for internal transfers and/or withdrawals.
The admin can also cancel/reverse internal transfers. Obviously this will not work correctly if the coins have already been withdrawn and will result in problems.
It is not possible for users to see other user balances.
Trading between users is facilitated via the exchange extension, that’s what markets are for. If a user places a limit order, that means that they have the balance to do so. This is different from internal transfers ([wallets_move]), which is simply a user sending funds to another user without any expectation of getting something back.
with regards
P.S. If you have any more questions about the plugin, please open a new thread per question. (See how to ask for support). Thank you.