3 type balance = {id :int, name : string, amount : real}
5 val addBalance : string -> int
6 val lookupBalance : int -> balance
7 val modBalance : balance -> unit
8 val deleteBalance : int -> unit
9 val listBalances : unit -> balance list
10 val listOwnedBalances : unit -> balance list
11 val listBalanceUsers : int -> Init.user list
13 val validBalanceName : string -> bool
14 val balanceNameToId : string -> int option