diff --git a/src/lib.rs b/src/lib.rs
index 2996e2d4..3b72845c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -62,7 +62,7 @@ pub fn select_coins<T: Utxo>(
     fee_rate: FeeRate,
     weighted_utxos: &mut [WeightedUtxo],
 ) -> Option<Vec<WeightedUtxo>> {
-    match select_coins_bnb(target, cost_of_change, weighted_utxos.to_vec()) {
+    match select_coins_bnb(target, cost_of_change, fee_rate, weighted_utxos.to_vec()) {
         Some(_res) => Some(Vec::new()),
         None => select_coins_srd(target, fee_rate, weighted_utxos, &mut thread_rng()),
     }
@@ -150,6 +150,7 @@ pub fn select_coins<T: Utxo>(
 pub fn select_coins_bnb(
     target: Amount,
     cost_of_change: Amount,
+    _fee_rate: FeeRate,
     mut weighted_utxos: Vec<WeightedUtxo>,
 ) -> Option<Vec<usize>> {
     // Total_Tries in Core:
@@ -320,11 +321,9 @@ mod tests {
     use bitcoin::Weight;
     use core::str::FromStr;
 
-    const SATISFACTION_SIZE: Weight = Weight::from_wu(204);
-
     fn create_weighted_utxos() -> Vec<WeightedUtxo> {
         let utxo_one = WeightedUtxo {
-            satisfaction_weight: SATISFACTION_SIZE,
+            satisfaction_weight: Weight::ZERO,
             utxo: TxOut {
                 value: Amount::from_str("1 cBTC").unwrap(),
                 script_pubkey: ScriptBuf::new(),
@@ -332,7 +331,7 @@ mod tests {
         };
 
         let utxo_two = WeightedUtxo {
-            satisfaction_weight: SATISFACTION_SIZE,
+            satisfaction_weight: Weight::ZERO,
             utxo: TxOut {
                 value: Amount::from_str("2 cBTC").unwrap(),
                 script_pubkey: ScriptBuf::new(),
@@ -340,7 +339,7 @@ mod tests {
         };
 
         let utxo_three = WeightedUtxo {
-            satisfaction_weight: SATISFACTION_SIZE,
+            satisfaction_weight: Weight::ZERO,
             utxo: TxOut {
                 value: Amount::from_str("3 cBTC").unwrap(),
                 script_pubkey: ScriptBuf::new(),
@@ -348,7 +347,7 @@ mod tests {
         };
 
         let utxo_four = WeightedUtxo {
-            satisfaction_weight: SATISFACTION_SIZE,
+            satisfaction_weight: Weight::ZERO,
             utxo: TxOut {
                 value: Amount::from_str("4 cBTC").unwrap(),
                 script_pubkey: ScriptBuf::new(),
@@ -363,14 +362,15 @@ mod tests {
         let target = Amount::from_str("1 cBTC").unwrap();
 
         let weighted_utxos = vec![WeightedUtxo {
-            satisfaction_weight: SATISFACTION_SIZE,
+            satisfaction_weight: Weight::ZERO,
             utxo: TxOut {
                 value: Amount::from_str("1 cBTC").unwrap(),
                 script_pubkey: ScriptBuf::new(),
             },
         }];
 
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![0];
         assert_eq!(index_list, expected_index_list);
     }
@@ -381,14 +381,14 @@ mod tests {
 
         let weighted_utxos = vec![
             WeightedUtxo {
-                satisfaction_weight: SATISFACTION_SIZE,
+                satisfaction_weight: Weight::ZERO,
                 utxo: TxOut {
                     value: Amount::from_str("4 cBTC").unwrap(),
                     script_pubkey: ScriptBuf::new(),
                 },
             },
             WeightedUtxo {
-                satisfaction_weight: SATISFACTION_SIZE,
+                satisfaction_weight: Weight::ZERO,
                 utxo: TxOut {
                     value: Amount::from_str("3 cBTC").unwrap(),
                     script_pubkey: ScriptBuf::new(),
@@ -396,7 +396,8 @@ mod tests {
             },
         ];
 
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![0];
         assert_eq!(index_list, expected_index_list);
     }
@@ -407,14 +408,14 @@ mod tests {
 
         let weighted_utxos = vec![
             WeightedUtxo {
-                satisfaction_weight: SATISFACTION_SIZE,
+                satisfaction_weight: Weight::ZERO,
                 utxo: TxOut {
                     value: Amount::from_str("4 cBTC").unwrap(),
                     script_pubkey: ScriptBuf::new(),
                 },
             },
             WeightedUtxo {
-                satisfaction_weight: SATISFACTION_SIZE,
+                satisfaction_weight: Weight::ZERO,
                 utxo: TxOut {
                     value: Amount::from_str("3 cBTC").unwrap(),
                     script_pubkey: ScriptBuf::new(),
@@ -422,7 +423,8 @@ mod tests {
             },
         ];
 
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![0, 1];
         assert_eq!(index_list, expected_index_list);
     }
@@ -431,7 +433,8 @@ mod tests {
     fn one() {
         let target = Amount::from_str("1 cBTC").unwrap();
         let weighted_utxos = create_weighted_utxos();
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![3];
         assert_eq!(index_list, expected_index_list);
     }
@@ -440,7 +443,8 @@ mod tests {
     fn two() {
         let target = Amount::from_str("2 cBTC").unwrap();
         let weighted_utxos = create_weighted_utxos();
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![2];
         assert_eq!(index_list, expected_index_list);
     }
@@ -449,7 +453,8 @@ mod tests {
     fn three() {
         let target = Amount::from_str("3 cBTC").unwrap();
         let weighted_utxos = create_weighted_utxos();
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![2, 3];
         assert_eq!(index_list, expected_index_list);
     }
@@ -458,7 +463,8 @@ mod tests {
     fn four() {
         let target = Amount::from_str("4 cBTC").unwrap();
         let weighted_utxos = create_weighted_utxos();
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![1, 3];
         assert_eq!(index_list, expected_index_list);
     }
@@ -467,7 +473,8 @@ mod tests {
     fn five() {
         let target = Amount::from_str("5 cBTC").unwrap();
         let weighted_utxos = create_weighted_utxos();
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![1, 2];
         assert_eq!(index_list, expected_index_list);
     }
@@ -476,7 +483,8 @@ mod tests {
     fn six() {
         let target = Amount::from_str("6 cBTC").unwrap();
         let weighted_utxos = create_weighted_utxos();
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![1, 2, 3];
         assert_eq!(index_list, expected_index_list);
     }
@@ -485,7 +493,8 @@ mod tests {
     fn seven() {
         let target = Amount::from_str("7 cBTC").unwrap();
         let weighted_utxos = create_weighted_utxos();
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![0, 2, 3];
         assert_eq!(index_list, expected_index_list);
     }
@@ -494,7 +503,8 @@ mod tests {
     fn eight() {
         let target = Amount::from_str("8 cBTC").unwrap();
         let weighted_utxos = create_weighted_utxos();
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![0, 1, 3];
         assert_eq!(index_list, expected_index_list);
     }
@@ -503,7 +513,8 @@ mod tests {
     fn nine() {
         let target = Amount::from_str("9 cBTC").unwrap();
         let weighted_utxos = create_weighted_utxos();
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![0, 1, 2];
         assert_eq!(index_list, expected_index_list);
     }
@@ -512,7 +523,8 @@ mod tests {
     fn ten() {
         let target = Amount::from_str("10 cBTC").unwrap();
         let weighted_utxos = create_weighted_utxos();
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         let expected_index_list = vec![0, 1, 2, 3];
         assert_eq!(index_list, expected_index_list);
     }
@@ -526,18 +538,21 @@ mod tests {
         let cost_of_change = target;
 
         let weighted_utxos = vec![WeightedUtxo {
-            satisfaction_weight: SATISFACTION_SIZE,
+            satisfaction_weight: Weight::ZERO,
             utxo: TxOut {
                 value: Amount::from_str("1.5 cBTC").unwrap(),
                 script_pubkey: ScriptBuf::new(),
             },
         }];
 
-        let index_list = select_coins_bnb(target, cost_of_change, weighted_utxos.clone()).unwrap();
+        let index_list =
+            select_coins_bnb(target, cost_of_change, FeeRate::ZERO, weighted_utxos.clone())
+                .unwrap();
         let expected_index_list = vec![0];
         assert_eq!(index_list, expected_index_list);
 
-        let index_list = select_coins_bnb(target, Amount::ZERO, weighted_utxos).unwrap();
+        let index_list =
+            select_coins_bnb(target, Amount::ZERO, FeeRate::ZERO, weighted_utxos).unwrap();
         assert_eq!(index_list, vec![]);
     }
 }