fix reference_inputs (#34)

rust/src/tx_builder.rs

@@ -431,7 +431,7 @@ pub struct TransactionBuilder {
     required_signers: Ed25519KeyHashes,
     collateral_return: Option<TransactionOutput>,
     total_collateral: Option<Coin>,
-    reference_inputs: HashSet<TransactionInput>,
+    reference_inputs: TransactionInputs,
     minswap_mode: bool,
     plutus_scripts: Option<PlutusScripts>,
     plutus_data: Option<PlutusList>,
@@ -849,7 +849,7 @@ impl TransactionBuilder {
     }
 
     pub fn add_reference_input(&mut self, reference_input: &TransactionInput) {
-        self.reference_inputs.insert(reference_input.clone());
+        self.reference_inputs.add(reference_input);
     }
 
     /// We have to know what kind of inputs these are to know what kind of mock witnesses to create since
@@ -1332,7 +1332,7 @@ impl TransactionBuilder {
             required_signers: Ed25519KeyHashes::new(),
             collateral_return: None,
             total_collateral: None,
-            reference_inputs: HashSet::new(),
+            reference_inputs: TransactionInputs::new(),
             minswap_mode: cfg.minswap_mode,
             plutus_scripts: None,
             plutus_data: None,
@@ -1341,13 +1341,7 @@ impl TransactionBuilder {
     }
 
     pub fn get_reference_inputs(&self) -> TransactionInputs {
-        let mut inputs = self.reference_inputs.clone();
-        for input in self.inputs.get_ref_inputs().0 {
-            inputs.insert(input);
-        }
-
-        let vec_inputs = inputs.into_iter().collect();
-        TransactionInputs(vec_inputs)
+        self.reference_inputs.clone()
     }
 
     /// does not include refunds or withdrawals