Remove Clone

src/lib.rs

@@ -28,7 +28,7 @@ pub use crate::single_random_draw::select_coins_srd;
 
 /// Trait that a UTXO struct must implement to be used as part of the coin selection
 /// algorithm.
-pub trait Utxo: Clone {
+pub trait Utxo {
     /// Return the value of the UTXO.
     fn get_value(&self) -> u64;
 
@@ -48,7 +48,7 @@ pub fn select_coins<T: Utxo>(
     cost_of_change: u64,
 	fee_rate: u64,
     utxo_pool: &mut [T],
-) -> Option<Vec<T>> {
+) -> Option<Vec<&T>> {
 	let spend = Spend::new(fee_rate);
 
     match select_coins_bnb(target, cost_of_change, utxo_pool) {

src/single_random_draw.rs

@@ -16,7 +16,7 @@ use rand::{seq::SliceRandom, thread_rng};
 /// Requires compilation with the "rand" feature.
 #[cfg(any(test, feature = "rand"))]
 #[cfg_attr(docsrs, doc(cfg(feature = "rand")))]
-pub fn select_coins_srd<T: Utxo>(target: u64, utxo_pool: &mut [T], spend: Spend) -> Option<Vec<T>> {
+pub fn select_coins_srd<T: Utxo>(target: u64, utxo_pool: &mut [T], spend: Spend) -> Option<Vec<&T>> {
     utxo_pool.shuffle(&mut thread_rng());
 
     let mut sum = 0;
@@ -30,8 +30,7 @@ pub fn select_coins_srd<T: Utxo>(target: u64, utxo_pool: &mut [T], spend: Spend)
             sum += spend.get_effective_value(*x);
             true
         })
-        .cloned()
-        .collect::<Vec<T>>();
+        .collect::<Vec<&T>>();
 
     if sum >= target {
         return Some(res);