Function grin_wallet::libwallet::internal::selection::select_coins

pub fn select_coins<T: ?Sized, C, K>(
    wallet: &mut T, 
    amount: u64, 
    current_height: u64, 
    minimum_confirmations: u64, 
    max_outputs: usize, 
    select_all: bool, 
    parent_key_id: &Identifier
) -> (usize, Vec<OutputData>) where
    T: WalletBackend<C, K>,
    C: NodeClient,
    K: Keychain, 

Select spendable coins from a wallet. Default strategy is to spend the maximum number of outputs (up to max_outputs). Alternative strategy is to spend smallest outputs first but only as many as necessary. When we introduce additional strategies we should pass something other than a bool in. TODO: Possibly move this into another trait to be owned by a wallet?