diff --git a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/README.md b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/README.md
index b089a8e850..af110d7dab 100644
--- a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/README.md
+++ b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/README.md
@@ -101,13 +101,14 @@ Future<void> main() async {
 }
 
 Transaction _buildUnsignedTx({
-  required List<TransactionUnspentOutput> utxos,
+  required Set<TransactionUnspentOutput> utxos,
   required ShelleyAddress changeAddress,
 }) {
   const txBuilderConfig = TransactionBuilderConfig(
-    feeAlgo: LinearFee(
-      constant: Coin(155381),
-      coefficient: Coin(44),
+    feeAlgo: TieredFee(
+      constant: 155381,
+      coefficient: 44,
+      refScriptByteCost: 15,
     ),
     maxTxSize: 16384,
     maxValueSize: 5000,
diff --git a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/main.dart b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/main.dart
index a3fd2f5c2c..0e99f9d7d3 100644
--- a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/main.dart
+++ b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/main.dart
@@ -238,7 +238,7 @@ class _WalletDetailsState extends State<_WalletDetails> {
   List<ShelleyAddress>? _rewardAddresses;
   List<ShelleyAddress>? _unusedAddresses;
   List<ShelleyAddress>? _usedAddresses;
-  List<TransactionUnspentOutput>? _utxos;
+  Set<TransactionUnspentOutput>? _utxos;
   PubDRepKey? _pubDRepKey;
   List<PubStakeKey>? _registeredPubStakeKeys;
   List<PubStakeKey>? _unregisteredPubStakeKeys;
@@ -450,7 +450,7 @@ String _formatBalance(Balance? balance) {
   return buffer.toString();
 }
 
-String _formatUtxos(List<TransactionUnspentOutput>? utxos) {
+String _formatUtxos(Set<TransactionUnspentOutput>? utxos) {
   if (utxos == null) {
     return '---';
   }
diff --git a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/sign_and_submit_rbac_tx.dart b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/sign_and_submit_rbac_tx.dart
index 5ad2c02bd6..ac34dc1ab6 100644
--- a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/sign_and_submit_rbac_tx.dart
+++ b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/sign_and_submit_rbac_tx.dart
@@ -75,7 +75,7 @@ Future<void> _signAndSubmitRbacTx({
 }
 
 Future<X509MetadataEnvelope<RegistrationData>> _buildMetadataEnvelope({
-  required List<TransactionUnspentOutput> utxos,
+  required Set<TransactionUnspentOutput> utxos,
   required ShelleyAddress rewardAddress,
 }) async {
   final seed = List.generate(
@@ -152,7 +152,7 @@ Future<X509MetadataEnvelope<RegistrationData>> _buildMetadataEnvelope({
 }
 
 Transaction _buildUnsignedRbacTx({
-  required List<TransactionUnspentOutput> inputs,
+  required Set<TransactionUnspentOutput> inputs,
   required ShelleyAddress changeAddress,
   required ShelleyAddress rewardAddress,
   required AuxiliaryData auxiliaryData,
diff --git a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/sign_and_submit_tx.dart b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/sign_and_submit_tx.dart
index 47a07f8fd2..a92f886e61 100644
--- a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/sign_and_submit_tx.dart
+++ b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano/example/lib/sign_and_submit_tx.dart
@@ -47,7 +47,7 @@ Future<void> _signAndSubmitTx({
 }
 
 Transaction _buildUnsignedTx({
-  required List<TransactionUnspentOutput> utxos,
+  required Set<TransactionUnspentOutput> utxos,
   required ShelleyAddress changeAddress,
 }) {
   /* cSpell:disable */
@@ -81,9 +81,10 @@ Transaction _buildUnsignedTx({
 
 TransactionBuilderConfig _buildTransactionBuilderConfig() {
   return const TransactionBuilderConfig(
-    feeAlgo: LinearFee(
-      constant: Coin(155381),
-      coefficient: Coin(44),
+    feeAlgo: TieredFee(
+      constant: 155381,
+      coefficient: 44,
+      refScriptByteCost: 15,
     ),
     maxTxSize: 16384,
     maxValueSize: 5000,
diff --git a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano_platform_interface/lib/src/cardano_wallet.dart b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano_platform_interface/lib/src/cardano_wallet.dart
index 46ad60abd7..5ae71169b5 100644
--- a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano_platform_interface/lib/src/cardano_wallet.dart
+++ b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano_platform_interface/lib/src/cardano_wallet.dart
@@ -116,7 +116,7 @@ abstract interface class CardanoWalletApi {
   /// specified in amount, and if this cannot be attained,
   /// null shall be returned. The results can be further paginated by
   /// [paginate] if it is not null.
-  Future<List<TransactionUnspentOutput>> getUtxos({
+  Future<Set<TransactionUnspentOutput>> getUtxos({
     Balance? amount,
     Paginate? paginate,
   });
diff --git a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano_web/lib/src/interop/catalyst_cardano_wallet_proxy.dart b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano_web/lib/src/interop/catalyst_cardano_wallet_proxy.dart
index 77f1ca0b18..025232180f 100644
--- a/catalyst_voices_packages/catalyst_cardano/catalyst_cardano_web/lib/src/interop/catalyst_cardano_wallet_proxy.dart
+++ b/catalyst_voices_packages/catalyst_cardano/catalyst_cardano_web/lib/src/interop/catalyst_cardano_wallet_proxy.dart
@@ -171,7 +171,7 @@ class JSCardanoWalletApiProxy implements CardanoWalletApi {
   }
 
   @override
-  Future<List<TransactionUnspentOutput>> getUtxos({
+  Future<Set<TransactionUnspentOutput>> getUtxos({
     Balance? amount,
     Paginate? paginate,
   }) async {
@@ -183,7 +183,7 @@ class JSCardanoWalletApiProxy implements CardanoWalletApi {
         paginate != null ? JSPaginate.fromDart(paginate) : makeUndefined(),
       );
 
-      if (utxos == null) return [];
+      if (utxos == null) return {};
 
       return await utxos.toDart.then(
         (array) => array.toDart
@@ -192,7 +192,7 @@ class JSCardanoWalletApiProxy implements CardanoWalletApi {
                 cbor.decode(hex.decode(item.toDart)),
               ),
             )
-            .toList(),
+            .toSet(),
       );
     } catch (ex) {
       throw _mapApiException(ex) ??
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/README.md b/catalyst_voices_packages/catalyst_cardano_serialization/README.md
index 4cb692b5d5..8188f53185 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/README.md
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/README.md
@@ -52,9 +52,10 @@ import 'package:convert/convert.dart';
 /* cSpell:disable */
 void main() {
   const txBuilderConfig = TransactionBuilderConfig(
-    feeAlgo: LinearFee(
-      constant: Coin(155381),
-      coefficient: Coin(44),
+    feeAlgo: TieredFee(
+      constant: 155381,
+      coefficient: 44,
+      refScriptByteCost: 0,
     ),
     maxTxSize: 16384,
     maxValueSize: 5000,
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/example/main.dart b/catalyst_voices_packages/catalyst_cardano_serialization/example/main.dart
index bb01322031..6183e5010f 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/example/main.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/example/main.dart
@@ -7,9 +7,10 @@ import 'package:convert/convert.dart';
 /* cSpell:disable */
 void main() {
   const txBuilderConfig = TransactionBuilderConfig(
-    feeAlgo: LinearFee(
-      constant: Coin(155381),
-      coefficient: Coin(44),
+    feeAlgo: TieredFee(
+      constant: 155381,
+      coefficient: 44,
+      refScriptByteCost: 15,
     ),
     maxTxSize: 16384,
     maxValueSize: 5000,
@@ -58,7 +59,7 @@ void main() {
 
   final txBuilder = TransactionBuilder(
     config: txBuilderConfig,
-    inputs: [utxo],
+    inputs: {utxo},
     // fee can be left empty so that it's auto calculated or can be hardcoded
     // fee: const Coin(1000000),
     ttl: const SlotBigNum(410021),
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/builders/transaction_builder.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/builders/transaction_builder.dart
index 96d071ace6..9d53004f9a 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/builders/transaction_builder.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/builders/transaction_builder.dart
@@ -19,7 +19,7 @@ final class TransactionBuilder extends Equatable {
   ///
   /// Enough [inputs] must be provided to be greater or equal
   /// the amount of [outputs] + [fee].
-  final List<TransactionUnspentOutput> inputs;
+  final Set<TransactionUnspentOutput> inputs;
 
   /// The list of transaction outputs which describes which address
   /// will receive what amount of [Coin].
@@ -64,7 +64,7 @@ final class TransactionBuilder extends Equatable {
   final Coin? totalCollateral;
 
   /// Reference inputs as nonempty set of transaction inputs.
-  final Set<TransactionInput>? referenceInputs;
+  final Set<TransactionUnspentOutput>? referenceInputs;
 
   /// The builder that builds the witness set of the transaction.
   ///
@@ -249,7 +249,7 @@ final class TransactionBuilder extends Equatable {
   Coin minFee() {
     final txBody = _copyWith(fee: const Coin(Numbers.intMaxValue)).buildBody();
     final fullTx = buildFakeTransaction(txBody);
-    return config.feeAlgo.minNoScriptFee(fullTx);
+    return config.feeAlgo.minFee(fullTx, {...inputs, ...?referenceInputs});
   }
 
   @override
@@ -521,7 +521,7 @@ final class TransactionBuilder extends Equatable {
       networkId: networkId,
       collateralReturn: collateralReturn,
       totalCollateral: totalCollateral,
-      referenceInputs: referenceInputs,
+      referenceInputs: referenceInputs?.map((utxo) => utxo.input).toSet(),
     );
   }
 
@@ -555,7 +555,7 @@ final class TransactionBuilder extends Equatable {
 /// protocol parameters and other constants.
 final class TransactionBuilderConfig extends Equatable {
   /// The protocol parameter which describes the transaction fee algorithm.
-  final LinearFee feeAlgo;
+  final TieredFee feeAlgo;
 
   /// The protocol parameter which limits the maximum transaction size in bytes.
   final int maxTxSize;
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/exceptions.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/exceptions.dart
index fb27c13362..f809d27d54 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/exceptions.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/exceptions.dart
@@ -190,3 +190,21 @@ final class InsufficientAdaForAssetsException extends Equatable
   @override
   List<Object?> get props => [];
 }
+
+/// Exception thrown when the total size of reference scripts exceeds the limit.
+final class ReferenceScriptSizeLimitExceededException extends Equatable
+    implements Exception {
+  /// The maximum size of reference scripts allowed per transaction.
+  final int maxRefScriptSize;
+
+  /// The default constructor for [ReferenceScriptSizeLimitExceededException].
+  const ReferenceScriptSizeLimitExceededException(this.maxRefScriptSize);
+
+  @override
+  String toString() =>
+      'Total size of reference scripts exceeds the limit of $maxRefScriptSize '
+      'bytes';
+
+  @override
+  List<Object?> get props => [maxRefScriptSize];
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/fees.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/fees.dart
index f0aaad83a1..954c1d6927 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/fees.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/fees.dart
@@ -1,35 +1,172 @@
+import 'package:catalyst_cardano_serialization/src/exceptions.dart';
 import 'package:catalyst_cardano_serialization/src/transaction.dart';
+import 'package:catalyst_cardano_serialization/src/transaction_output.dart';
 import 'package:catalyst_cardano_serialization/src/types.dart';
 import 'package:cbor/cbor.dart';
 import 'package:equatable/equatable.dart';
 
-/// Calculates fees for the transaction on Cardano blockchain.
+/// A final class that implements a flexible fee algorithm. It calculates
+/// fees for transactions using both linear and tiered logic based on the
+/// size of reference scripts.
 ///
-/// The fee is calculated using the following formula:
-/// - `fee = constant + tx.bytes.len * coefficient`
-final class LinearFee extends Equatable {
-  /// The constant amount of [Coin] that is charged per transaction.
-  final Coin constant;
+/// If the [refScriptByteCost] parameter is `0` or if there are no reference
+/// scripts in the `inputs`, then the [TieredFee] class behaves like the
+/// pre-Conway linear fee model.
+final class TieredFee extends Equatable {
+  /// The constant amount of lovelace charged per transaction.
+  ///
+  /// This value is derived from the protocol parameter `minFeeA`.
+  final int constant;
+
+  /// The amount charged per transaction byte.
+  ///
+  /// This value is derived from the protocol parameter `minFeeB`.
+  final int coefficient;
+
+  /// The multiplier for the tiered fee algorithm.
+  /// This factor increases the fee per byte at each size increment.
+  ///
+  /// For the Conway era, this value on mainnet is set to 1.2.
+  final double multiplier;
+
+  /// The size increment for the tiered fee algorithm.
+  /// The fee per byte increases after this size.
+  ///
+  /// For the Conway era, this value on mainnet is set to 25,600 bytes.
+  final int sizeIncrement;
 
-  /// The amount of [Coin] per transaction byte that is charged per transaction.
-  final Coin coefficient;
+  /// The cost per byte for reference scripts.
+  /// This value is derived from the protocol parameter
+  /// `minFeeRefScriptCostPerByte`.
+  final int refScriptByteCost;
 
-  /// The default constructor for [LinearFee].
+  /// The maximum size of reference scripts allowed per transaction.
   ///
-  /// The parameters are Cardano protocol parameters.
-  const LinearFee({
+  /// This value is currently hardcoded, but will be turned into an actual
+  /// protocol parameter in the next era after Conway.
+  ///
+  /// For the Conway era, this value on mainnet is set to 204,800 bytes
+  /// (200 KiB).
+  final int maxRefScriptSize;
+
+  /// The default constructor for [TieredFee], which applies both linear and
+  /// tiered pricing based on transaction size.
+  ///
+  /// The parameters represent Cardano protocol values.
+  /// > Note: The [multiplier], [sizeIncrement] and [maxRefScriptSize] are
+  ///   currently hardcoded for mainnet but may become protocol parameters in
+  ///   the future.
+  const TieredFee({
     required this.constant,
     required this.coefficient,
+    this.multiplier = 1.2,
+    this.sizeIncrement = 25600,
+    required this.refScriptByteCost,
+    this.maxRefScriptSize = 204800,
   });
 
-  /// Calculates the fee for the transaction denominated in lovelaces.
+  /// Calculates the minimum fee for the transaction, adding any reference
+  /// script-related costs if applicable.
+  Coin minFee(Transaction tx, Set<TransactionUnspentOutput> inputs) {
+    final refScriptsBytes = _calculateReferenceScriptSize(inputs);
+
+    if (refScriptsBytes > maxRefScriptSize) {
+      throw ReferenceScriptSizeLimitExceededException(maxRefScriptSize);
+    }
+
+    final minTxFee = tieredFee(
+      cbor.encode(tx.toCbor()).length,
+      refScriptsBytes,
+    );
+
+    return Coin(minTxFee);
+  }
+
+  /// Calculates the linear fee for a transaction based on its size in bytes.
+  ///
+  /// The linear fee formula is:
+  /// - `fee = constant + (tx.bytes.len * coefficient)`
+  ///
+  /// > This formula does not account for smart contract scripts.
+  int linearFee(int bytesCount) => bytesCount * coefficient + constant;
+
+  /// Calculates the fee for a transaction using the tiered pricing model.
+  /// This includes both the linear fee and, if applicable, a reference script
+  /// fee.
+  int tieredFee(int txBytes, int refScriptsBytes) {
+    final txFee = linearFee(txBytes);
+    final scriptFee = refScriptByteCost > 0 && refScriptsBytes > 0
+        ? refScriptFee(
+            multiplier,
+            sizeIncrement,
+            refScriptByteCost,
+            refScriptsBytes,
+          )
+        : 0;
+    return txFee + scriptFee;
+  }
+
+  /// Calculates the fee for the reference scripts.
   ///
-  /// The formula doesn't take into account smart contract scripts.
-  Coin minNoScriptFee(Transaction tx) {
-    final bytesCount = cbor.encode(tx.toCbor()).length;
-    return Coin(bytesCount) * coefficient + constant;
+  /// The reference script fee is based on a tiered pricing model:
+  /// - The fee increases for each additional `25KiB` chunk of reference
+  ///   script size.
+  /// - The first `25KiB` is charged at a base cost per byte, and subsequent
+  ///   chunks are charged at progressively higher rates, multiplied by `1.2`.
+  int refScriptFee(
+    double multiplier,
+    int sizeIncrement,
+    int refScriptCostPerByte,
+    int resScriptSize,
+  ) {
+    int calcRefScriptFee(double acc, double curTierPrice, int n) =>
+        n <= sizeIncrement
+            ? (acc + n * curTierPrice).floor()
+            : calcRefScriptFee(
+                acc + curTierPrice * sizeIncrement,
+                curTierPrice * multiplier,
+                n - sizeIncrement,
+              );
+    return calcRefScriptFee(
+      0,
+      refScriptCostPerByte.toDouble(),
+      resScriptSize,
+    );
+  }
+
+  /// Calculates the total size of reference scripts used in a transaction.
+  ///
+  /// This includes the sizes of reference scripts from both inputs and
+  /// reference inputs. Outputs without reference scripts do not contribute
+  /// to the total size.
+  ///
+  /// Duplicate reference scripts are counted each time they appear in the
+  /// transaction, i.e., when the same script is used on different inputs.
+  ///
+  /// However, any input that appears in both regular inputs and
+  /// reference inputs of a transaction is only used once in this computation.
+  int _calculateReferenceScriptSize(Set<TransactionUnspentOutput> inputs) {
+    final totalSize = inputs.fold<int>(
+      0,
+      (prevSize, input) =>
+          prevSize +
+          switch (input.output) {
+            final TransactionOutput output =>
+              output.scriptRef != null ? output.scriptRef!.length : 0,
+            _ => 0,
+          },
+    );
+
+    return totalSize;
   }
 
   @override
-  List<Object?> get props => [constant, coefficient];
+  List<Object?> get props => [
+        constant,
+        coefficient,
+        multiplier,
+        sizeIncrement,
+        refScriptByteCost,
+        maxRefScriptSize,
+      ];
 }
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/hashes.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/hashes.dart
index dd46935752..6fa16006d0 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/hashes.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/hashes.dart
@@ -94,7 +94,7 @@ final class TransactionInputsHash extends BaseHash {
 
   /// Constructs the [TransactionInputsHash] from a [TransactionBody].
   TransactionInputsHash.fromTransactionInputs(
-    List<TransactionUnspentOutput> utxos,
+    Set<TransactionUnspentOutput> utxos,
   ) : super.fromBytes(
           bytes: Hash.blake2b(
             Uint8List.fromList(
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/scripts.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/scripts.dart
index 1cda0ef908..6e5a6c71dc 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/scripts.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/scripts.dart
@@ -2,6 +2,7 @@ import 'dart:typed_data';
 import 'package:catalyst_cardano_serialization/src/hashes.dart';
 import 'package:catalyst_cardano_serialization/src/types.dart';
 import 'package:cbor/cbor.dart';
+import 'package:convert/convert.dart';
 import 'package:equatable/equatable.dart';
 import 'package:pinenacl/digests.dart';
 
@@ -89,24 +90,25 @@ sealed class Script extends Equatable implements CborEncodable {
   /// Blake2b hash of the resulting bytes.
   Uint8List get hash {
     final cborValue = toCbor();
-    final bytesToHash = cborValue is CborBytes
-        ? _handleDoubleEncodedCbor(cborValue.bytes)
-        : cborValue;
+    final cborBytes = cbor.encode(cborValue);
 
-    final cborBytes = cbor.encode(bytesToHash);
     final bytes = Uint8List.fromList([tag, ...cborBytes]);
     return Hash.blake2b(bytes, digestSize: scriptHashSize);
   }
 
-  CborValue _handleDoubleEncodedCbor(List<int> bytes) {
-    final decoded = cbor.decode(bytes);
-    if (decoded is CborBytes) {
+  static CborValue _handleDoubleEncodedCbor(CborValue cborValue) {
+    if (cborValue is CborBytes) {
       try {
-        return cbor.decode(decoded.bytes);
+        return cbor.decode(cborValue.bytes);
       } catch (_) {}
     }
-    return decoded;
+    return cborValue;
   }
+
+  /// The length of the script in bytes.
+  ///
+  /// This is an abstract getter that must be implemented by the child classes.
+  int get length;
 }
 
 /// Abstract base class for native scripts, extending [Script].
@@ -222,6 +224,10 @@ sealed class NativeScript extends Script {
       _invalidCborError(value);
     }
   }
+
+  /// Returns the length of the [NativeScript]'s in bytes.
+  @override
+  int get length => cbor.encode(toCbor()).length;
 }
 
 /// Class representing a public key based native script.
@@ -405,7 +411,7 @@ class InvalidAfter extends NativeScript {
 /// Abstract base class for Plutus scripts, extending [Script].
 sealed class PlutusScript extends Script {
   /// [PlutusScript] represented as encoded CBOR bytes.
-  final Uint8List bytes;
+  final List<int> bytes;
 
   // TODO(ilap): Check whether the Plutus script bytes are valid CBOR CborByte-s
   // and throw an error if does not.
@@ -418,50 +424,76 @@ sealed class PlutusScript extends Script {
   CborValue toCbor() => CborBytes(bytes);
 
   /// Validates if the CBOR value is a valid Plutus script.
-  static void _plutusScriptValidity(CborValue value) {
-    if (value is! CborBytes) {
-      throw ArgumentError.value(value, 'value', 'Invalid Plutus script cbor');
-    }
+  static CborValue _plutusScriptValidity(CborValue value) {
+    return value is CborBytes
+        ? Script._handleDoubleEncodedCbor(value)
+        : throw ArgumentError.value(
+            value,
+            'value',
+            'Invalid Plutus script cbor',
+          );
   }
 
   /// Equatable props for value comparison of all Plutus scripts.
   @override
   List<Object?> get props => [bytes];
+
+  /// Returns the length of the [PlutusScript]'s in bytes.
+  @override
+  int get length => cbor.encode(CborBytes(bytes)).length;
 }
 
 /// Class representing a Plutus V1 script.
 class PlutusV1Script extends PlutusScript {
   /// [PlutusV1Script] constructor.
-  const PlutusV1Script(super.bytes);
+  const PlutusV1Script._(super.bytes);
 
   /// Factory constructor to create an [PlutusV1Script] from a CBOR list.
   factory PlutusV1Script.fromCbor(CborValue value) {
-    PlutusScript._plutusScriptValidity(value);
-    return PlutusV1Script(Uint8List.fromList((value as CborBytes).bytes));
+    final validCbor = PlutusScript._plutusScriptValidity(value);
+    return PlutusV1Script._((validCbor as CborBytes).bytes);
+  }
+
+  /// Factory constructor to create an [PlutusV2Script] from a CBOR hex string.
+  factory PlutusV1Script.fromHex(String cborHex) {
+    final cborValue = cbor.decode(hex.decode(cborHex));
+    return PlutusV1Script.fromCbor(cborValue);
   }
 }
 
 /// Class representing a Plutus V2 script.
 class PlutusV2Script extends PlutusScript {
   /// [PlutusV2Script] constructor.
-  const PlutusV2Script(super.bytes);
+  const PlutusV2Script._(super.bytes);
 
   /// Factory constructor to create an [PlutusV2Script] from a CBOR list.
-  factory PlutusV2Script.fromCbor(CborValue value) {
-    PlutusScript._plutusScriptValidity(value);
-    return PlutusV2Script(Uint8List.fromList((value as CborBytes).bytes));
+  factory PlutusV2Script.fromCbor(CborValue cborValue) {
+    final validCbor = PlutusScript._plutusScriptValidity(cborValue);
+    return PlutusV2Script._((validCbor as CborBytes).bytes);
+  }
+
+  /// Factory constructor to create an [PlutusV2Script] from a CBOR hex string.
+  factory PlutusV2Script.fromHex(String cborHex) {
+    final cborValue = cbor.decode(hex.decode(cborHex));
+    return PlutusV2Script.fromCbor(cborValue);
   }
 }
 
 /// Class representing a Plutus V3 script.
 class PlutusV3Script extends PlutusScript {
   /// [PlutusV3Script] constructor.
-  const PlutusV3Script(super.bytes);
+  const PlutusV3Script._(super.bytes);
 
   /// Factory constructor to create an [PlutusV3Script] from a CBOR list.
-  factory PlutusV3Script.fromCbor(CborValue value) {
-    PlutusScript._plutusScriptValidity(value);
-    return PlutusV3Script(Uint8List.fromList((value as CborBytes).bytes));
+  factory PlutusV3Script.fromCbor(CborValue cborValue) {
+    final validCbor = PlutusScript._plutusScriptValidity(cborValue);
+    return PlutusV3Script._((validCbor as CborBytes).bytes);
+  }
+
+  /// Factory constructor to create an [PlutusV2Script] from a CBOR hex string.
+  factory PlutusV3Script.fromHex(String cborHex) {
+    final cborValue = cbor.decode(hex.decode(cborHex));
+    return PlutusV3Script.fromCbor(cborValue);
   }
 }
 
@@ -512,4 +544,8 @@ class ScriptRef extends Script {
   /// Equatable props for value comparison.
   @override
   List<Object?> get props => [script];
+
+  /// Returns the length of the [ScriptRef]'s script in bytes.
+  @override
+  int get length => script.length;
 }
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/fees_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/fees_test.dart
index 4ed5f2898a..09ca244ec3 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/test/fees_test.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/fees_test.dart
@@ -5,35 +5,227 @@ import 'package:test/test.dart';
 import 'test_utils/test_data.dart';
 
 void main() {
-  group(LinearFee, () {
-    test('minFeeNoScript with current protocol params', () {
-      const linearFee = LinearFee(
-        constant: Coin(155381),
-        coefficient: Coin(44),
+  final txInputs = {
+    testUtxo(index: 0, scriptRef: refInputScripts[0]),
+    testUtxo(index: 1, scriptRef: refInputScripts[1]),
+    testUtxo(index: 2, scriptRef: refInputScripts[2]),
+  };
+
+  final refInputs = {
+    testUtxo(index: 3, scriptRef: refInputScripts[0]),
+    testUtxo(index: 4, scriptRef: refInputScripts[1]),
+    testUtxo(index: 5, scriptRef: refInputScripts[2]),
+  };
+
+  group(TieredFee, () {
+    test('minFee with current protocol params', () {
+      const tieredFee = TieredFee(
+        constant: 155381,
+        coefficient: 44,
+        refScriptByteCost: 15,
       );
 
       final tx = fullSignedTestTransaction();
-      expect(linearFee.minNoScriptFee(tx), equals(177777));
+      expect(tieredFee.minFee(tx, {}), equals(const Coin(177777)));
     });
 
-    test('minFeeNoScript with constant fee only', () {
-      const linearFee = LinearFee(
-        constant: Coin(155381),
-        coefficient: Coin(0),
+    test('minFee with constant fee only', () {
+      const tieredFee = TieredFee(
+        constant: 155381,
+        coefficient: 0,
+        refScriptByteCost: 15,
       );
 
       final tx = fullSignedTestTransaction();
-      expect(linearFee.minNoScriptFee(tx), equals(linearFee.constant));
+      expect(tieredFee.minFee(tx, {}), equals(Coin(tieredFee.constant)));
     });
 
-    test('minFeeNoScript with coefficient fee only', () {
-      const linearFee = LinearFee(
-        constant: Coin(0),
-        coefficient: Coin(44),
+    test('minFee with coefficient fee only', () {
+      const tieredFee = TieredFee(
+        constant: 0,
+        coefficient: 44,
+        refScriptByteCost: 15,
       );
 
       final tx = fullSignedTestTransaction();
-      expect(linearFee.minNoScriptFee(tx), equals(22396));
+      expect(tieredFee.minFee(tx, {}), equals(const Coin(22396)));
+    });
+
+    test('refScriptFee is a linear function when multiplier is 1', () {
+      const scriptByteFee = 15;
+      const size = 500;
+
+      const tieredFee = TieredFee(
+        constant: 155381,
+        coefficient: 44,
+        multiplier: 1,
+        refScriptByteCost: 15,
+      );
+
+      const expectedFee = size * scriptByteFee;
+      final actualFee = tieredFee.refScriptFee(
+        1,
+        tieredFee.sizeIncrement,
+        scriptByteFee,
+        size,
+      );
+
+      expect(actualFee, equals(expectedFee));
+    });
+
+    test('tierRefScriptFee with tiered pricing', () {
+      const multiplier = 1.5;
+      const sizeIncrement = 25600;
+      const baseFee = 15;
+
+      const tieredFee = TieredFee(
+        constant: 0,
+        coefficient: 44,
+        refScriptByteCost: 15,
+      );
+
+      const sizes = [
+        0,
+        sizeIncrement,
+        2 * sizeIncrement,
+        3 * sizeIncrement,
+        4 * sizeIncrement,
+        5 * sizeIncrement,
+        6 * sizeIncrement,
+        7 * sizeIncrement,
+        8 * sizeIncrement,
+      ];
+
+      const expectedFees = [
+        0,
+        384000,
+        960000,
+        1824000,
+        3120000,
+        5064000,
+        7980000,
+        12354000,
+        18915000,
+      ];
+      final actualFees = sizes
+          .map(
+            (size) => tieredFee.refScriptFee(
+              multiplier,
+              sizeIncrement,
+              baseFee,
+              size,
+            ),
+          )
+          .toList();
+
+      expect(actualFees, equals(expectedFees));
+    });
+
+    test('refScriptFee for a large reference script size and multiplier', () {
+      const tieredFee = TieredFee(
+        constant: 155381,
+        coefficient: 44,
+        multiplier: 1.5,
+        refScriptByteCost: 15,
+      );
+
+      const size = 100000;
+      const expectedFee = 2998500;
+      final actualFee = tieredFee.refScriptFee(
+        tieredFee.multiplier,
+        tieredFee.sizeIncrement,
+        tieredFee.refScriptByteCost,
+        size,
+      );
+
+      expect(actualFee, equals(expectedFee));
+    });
+
+    test('tieredFee and refScriptFee calculations', () {
+      const byteCost = 15;
+      const tieredFee = TieredFee(
+        constant: 155381,
+        coefficient: 44,
+        refScriptByteCost: byteCost,
+      );
+
+      const txBytes = 10000;
+      const refScriptsBytes = 5000;
+
+      final linearFee = tieredFee.linearFee(txBytes);
+      final scriptFee =
+          tieredFee.refScriptFee(1.5, 25600, byteCost, refScriptsBytes);
+      final expectedFee = Coin(linearFee + scriptFee);
+      final actualFee = tieredFee.tieredFee(txBytes, refScriptsBytes);
+
+      expect(actualFee, equals(expectedFee));
     });
   });
+
+  test('minFee for a large transaction with multiple reference scripts', () {
+    const tieredFee = TieredFee(
+      constant: 155381,
+      coefficient: 44,
+      refScriptByteCost: 15,
+    );
+
+    final inputs = txInputs.map((utxo) => utxo.input).toSet();
+
+    final tx = fullSignedTestTransaction(inputs: inputs);
+    final sum =
+        refInputScriptsSizes.reduce((value, element) => value + element);
+
+    final refScriptsFee = tieredFee.refScriptFee(
+      tieredFee.multiplier,
+      tieredFee.sizeIncrement,
+      tieredFee.refScriptByteCost,
+      sum,
+    );
+
+    const expectedFee = 180945;
+
+    final minNoScriptFee = tieredFee.minFee(tx, {});
+
+    // With no reference scripts.
+    expect(minNoScriptFee, equals(const Coin(expectedFee)));
+
+    expect(
+      tieredFee.minFee(tx, refInputs),
+      equals(minNoScriptFee + Coin(refScriptsFee)),
+    );
+  });
+
+  test('minFee for a large transaction with duplicate reference scripts', () {
+    const tieredFee = TieredFee(
+      constant: 155381,
+      coefficient: 44,
+      refScriptByteCost: 15,
+    );
+
+    final inputs =
+        {...txInputs, ...refInputs}.map((utxo) => utxo.input).toSet();
+
+    final tx = fullSignedTestTransaction(inputs: inputs);
+    final sum =
+        refInputScriptsSizes.reduce((value, element) => value + element);
+
+    final refScriptsFee = tieredFee.refScriptFee(
+      tieredFee.multiplier,
+      tieredFee.sizeIncrement,
+      tieredFee.refScriptByteCost,
+      2 * sum,
+    );
+
+    const expectedFee = 185697;
+
+    final minNoScriptFee = tieredFee.minFee(tx, {});
+
+    // With no reference scripts.
+    expect(minNoScriptFee, equals(const Coin(expectedFee)));
+
+    expect(
+      tieredFee.minFee(tx, {...txInputs, ...refInputs}),
+      equals(minNoScriptFee + Coin(refScriptsFee)),
+    );
+  });
 }
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/hashes_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/hashes_test.dart
index 8136b31c12..537207d5a6 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/test/hashes_test.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/hashes_test.dart
@@ -66,7 +66,7 @@ void main() {
     });
 
     test('from transaction inputs', () {
-      final hash = TransactionInputsHash.fromTransactionInputs([testUtxo()]);
+      final hash = TransactionInputsHash.fromTransactionInputs({testUtxo()});
       expect(
         hash,
         equals(
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/scripts_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/scripts_test.dart
index ca5a4ccf53..c6abc2e59d 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/test/scripts_test.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/scripts_test.dart
@@ -1,5 +1,5 @@
-import 'dart:typed_data';
 import 'package:catalyst_cardano_serialization/catalyst_cardano_serialization.dart';
+import 'package:cbor/cbor.dart';
 import 'package:convert/convert.dart';
 import 'package:test/test.dart';
 
@@ -189,6 +189,17 @@ void main() {
         final json = script['json']! as Map<String, dynamic>;
         final simpleScript = NativeScript.fromJSON(json);
 
+        final cborValue = simpleScript.toCbor();
+        final cborLen = cbor.encode(cborValue).length;
+        final fromCbor = NativeScript.fromCbor(cborValue);
+
+        // Length check
+        expect(cborLen, equals(simpleScript.length));
+
+        // from/toCbor check
+        expect(simpleScript, equals(fromCbor));
+
+        // Golden hash test.
         expect(
           simpleScript.hash,
           equals(hex.decode(script['hash']! as String)),
@@ -200,10 +211,21 @@ void main() {
   group(PlutusScript, () {
     test('hashes (V2 only)', () {
       for (final script in plutusV2ScriptsJSON) {
-        final scriptCborBytes =
-            Uint8List.fromList(hex.decode(script['compiledCode']!));
-        final plutusScript = PlutusV2Script(scriptCborBytes);
+        final compiledCode = script['compiledCode']!;
+        final scriptLength = compiledCode.length ~/ 2;
+
+        final decodedCode = cbor.decode(hex.decode(compiledCode));
+
+        final plutusScript = PlutusV2Script.fromHex(compiledCode);
+        final cborValue = plutusScript.toCbor();
 
+        // Length check
+        expect(scriptLength, equals(plutusScript.length));
+
+        // from/toCbor check
+        expect(cborValue, equals(decodedCode));
+
+        // Golden hash test
         expect(plutusScript.hash, equals(hex.decode(script['hash']!)));
       }
     });
@@ -216,15 +238,21 @@ void main() {
         final hash = json['hash']! as String;
         final type = script['type'] as String;
         final cborHex = script['cborHex'] as String;
-        final cborBytes = Uint8List.fromList(hex.decode(cborHex));
+
+        // The cborHex has a `45` prefix.
+        final scriptLength = cborHex.length ~/ 2 - 1;
 
         final plutusScript = switch (type) {
-          'PlutusScriptV1' => PlutusV1Script(cborBytes),
-          'PlutusScriptV2' => PlutusV2Script(cborBytes),
-          'PlutusScriptV3' => PlutusV3Script(cborBytes),
+          'PlutusScriptV1' => PlutusV1Script.fromHex(cborHex),
+          'PlutusScriptV2' => PlutusV2Script.fromHex(cborHex),
+          'PlutusScriptV3' => PlutusV3Script.fromHex(cborHex),
           _ => throw Exception('Unknown script type: $type'),
         };
 
+        // Length check
+        expect(scriptLength, equals(plutusScript.length));
+
+        // Golden hash test
         expect(plutusScript.hash, equals(hex.decode(hash)));
       }
     });
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/test_utils/test_data.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/test_utils/test_data.dart
index 829f338872..45c7d330e7 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/test/test_utils/test_data.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/test_utils/test_data.dart
@@ -1,5 +1,6 @@
 import 'package:catalyst_cardano_serialization/src/address.dart';
 import 'package:catalyst_cardano_serialization/src/hashes.dart';
+import 'package:catalyst_cardano_serialization/src/scripts.dart';
 import 'package:catalyst_cardano_serialization/src/signature.dart';
 import 'package:catalyst_cardano_serialization/src/transaction.dart';
 import 'package:catalyst_cardano_serialization/src/transaction_output.dart';
@@ -31,26 +32,27 @@ final testTransactionHash = TransactionHash.fromHex(
   '4c1fbc5433ec764164945d736a09dc087d59ff30e64d26d462ff8570cd4be9a7',
 );
 
-TransactionUnspentOutput testUtxo() {
+TransactionUnspentOutput testUtxo({int? index, ScriptRef? scriptRef}) {
   return TransactionUnspentOutput(
     input: TransactionInput(
       transactionId: testTransactionHash,
-      index: 0,
+      index: index ?? 0,
     ),
-    output: PreBabbageTransactionOutput(
+    output: TransactionOutput(
       address: ShelleyAddress.fromBech32(
         'addr_test1qpu5vlrf4xkxv2qpwngf6cjhtw542ayty80v8dyr49rf5'
         'ewvxwdrt70qlcpeeagscasafhffqsxy36t90ldv06wqrk2qum8x5w',
       ),
       amount: const Balance(coin: Coin(100000000)),
+      scriptRef: scriptRef,
     ),
   );
 }
 
-Transaction minimalUnsignedTestTransaction() {
+Transaction minimalUnsignedTestTransaction({Set<TransactionInput>? inputs}) {
   return Transaction(
     body: TransactionBody(
-      inputs: {testUtxo().input},
+      inputs: inputs ?? {testUtxo().input},
       outputs: [
         PreBabbageTransactionOutput(
           address: testnetAddr,
@@ -69,10 +71,10 @@ Transaction minimalUnsignedTestTransaction() {
 }
 
 /// Returns a minimal transaction with optional fields skipped.
-Transaction minimalSignedTestTransaction() {
+Transaction minimalSignedTestTransaction({Set<TransactionInput>? inputs}) {
   return Transaction(
     body: TransactionBody(
-      inputs: {testUtxo().input},
+      inputs: inputs ?? {testUtxo().input},
       outputs: [
         PreBabbageTransactionOutput(
           address: testnetAddr,
@@ -108,12 +110,12 @@ Transaction minimalSignedTestTransaction() {
   );
 }
 
-Transaction fullUnsignedTestTransaction() {
+Transaction fullUnsignedTestTransaction({Set<TransactionInput>? inputs}) {
   final auxiliaryData = testAuxiliaryData();
 
   return Transaction(
     body: TransactionBody(
-      inputs: {testUtxo().input},
+      inputs: inputs ?? {testUtxo().input},
       outputs: [
         PreBabbageTransactionOutput(
           address: testnetAddr,
@@ -146,12 +148,12 @@ Transaction fullUnsignedTestTransaction() {
 }
 
 /// Returns a full transaction with all possible optional fields.
-Transaction fullSignedTestTransaction() {
+Transaction fullSignedTestTransaction({Set<TransactionInput>? inputs}) {
   final auxiliaryData = testAuxiliaryData();
 
   return Transaction(
     body: TransactionBody(
-      inputs: {testUtxo().input},
+      inputs: inputs ?? {testUtxo().input},
       outputs: [
         PreBabbageTransactionOutput(
           address: testnetAddr,
@@ -274,3 +276,346 @@ A2679B6E682D2A26945ED0B2
     .replaceAll('\n', '');
 
 /* cSpell:enable */
+
+/// Reference scripts that exist on the Preview network, with sizes verified.
+const refInputScriptsSizes = [2470, 6296, 1579];
+
+final refInputScripts = [
+  ScriptRef(
+    PlutusV2Script.fromHex(
+      '5909a30100003323232323232323232323232322322323232323222533300f32'
+      '323253330123008301437540022646464646464a666030601e60346ea80044c8'
+      'c8c94ccc07c00454cc07005c584c94ccc080c08c0084c8c94ccc078cdc3a4008'
+      '60406ea80044c8c8c8c8c8c94ccc090cccc004c8cc004004040894ccc0a80045'
+      '2f5bded8c0264646464a66605466e45221000021533302a3371e910100002100'
+      '3100513302f337606ea4008dd3000998030030019bab302c003375c605400460'
+      '5c00460580026eb8c008c09cdd50029bae30083027375400aa66604800629001'
+      '0a4002264a66604a666600400203e666e31200048008dd7180498141baa00648'
+      '00854cc8cc098cdc399918008009129998160008a40002600666004004605e00'
+      '2646600200200644a666058002297ae013302d302a302e00133002002302f001'
+      '480104c8c8c8c94ccc0a8cdc39bad3014302d3754016600a6eb4c050c0b4dd50'
+      '110a99981519b894800000454ccc0a8cdc380099b80002533302a00914800852'
+      '00113371e6eb8c020c0b4dd50111bae3008302d375401629405280a503002375'
+      'c600660586ea8028c004dd7180118159baa02023253330293370e66e38009200'
+      '04818054ccc0a4c07c004520001613232333001001480012000222533302d337'
+      '0e0020082004266600600664a66605ca66605c66e25206000113371200290390'
+      'a5013370066e0800d201433700002902f8a99817a4811f657870656374206279'
+      '7465203e3d2034382026262062797465203c3d20353700163371c00c00260100'
+      '026e34008dc6800918169817181718170009b804800854cc0992413565787065'
+      '6374206c6973742e6c656e6774682876616c75652e706f6c6963696573286f75'
+      '747075745f76616c75652929203d3d203200161533026491866578706563740a'
+      '2020202020206861735f6f6e6c795f746f6b656e280a20202020202020206f75'
+      '747075745f76616c75652c0a2020202020202020617574685f746f6b656e2c0a'
+      '20202020202020206279746561727261792e74616b65286e65775f7374617465'
+      '2e6164617461672c2031292c0a2020202020202020312c0a2020202020202900'
+      '1637566018604e6ea802454cc0952401a66578706563740a202020202020636f'
+      '72726563745f6e66745f616d6f756e74280a20202020202020206d696e74696e'
+      '673a206d696e74696e672c0a20202020202020206d696e743a206d696e742c0a'
+      '202020202020202073796d626f6c3a206e65775f73746174652e6d696e74696e'
+      '675f706f6c6963792c0a2020202020202020746f6b656e5f6e616d653a206e65'
+      '775f73746174652e6164617461672c0a202020202020290016222232533302c0'
+      '01153302902716132533302d3030002132533302a3371e6eb8c0b00080144cdc'
+      '38008020a50375a60580022a660540502c605c00264a666050603c60546ea800'
+      '452f5bded8c026eacc0b8c0acdd500099198008008029129998168008a6103d8'
+      '7a8000132323232533302d337220120042a66605a66e3c0240084cdd2a400066'
+      '0646e980052f5c02980103d87a80001330060060033756605e0066eb8c0b4008'
+      'c0c4008c0bc0048c0a4c0a8c0a8c0a8c0a8c0a8004cdd7980498121baa0024c1'
+      '03d87980003301500101d53333330270011001153302001c16153302001c1615'
+      '3302001c16153302001c163024302137540022a6603e92013065787065637420'
+      '496e6c696e65446174756d286e65775f737461746529203d206f776e5f6f7574'
+      '7075742e646174756d001630013020375400446046604860480022a6603a0302'
+      'c6042002646600200200e44a666040002297ae013232533301e3375e60106042'
+      '6ea80080144cc08c008cc0100100044cc010010004c090008c088004c07cc070'
+      'dd51800980e1baa301f301c37540044603e60400022a66032921346578706563'
+      '7420536f6d65286f776e5f696e70757429203d2066696e645f696e7075742869'
+      '6e707574732c206f776e5f7265662900163322323300100100322533301f0011'
+      '4c0103d87a800013232533301d3375e600e60406ea80080144cdd2a400066044'
+      '00497ae0133004004001302300230210013758603a00a603a60346ea80188c07'
+      '4004dd5980d980e180e0011bac301a001301a301a001301537540042a6602692'
+      '011f657870656374205370656e64286f776e5f72656629203d20707572706f73'
+      '650016301730180023016001301237540022930a998082491856616c69646174'
+      '6f722072657475726e65642066616c736500136563300100400a22533300d300'
+      '4300f3754004264a6660240022a6601e0042c26464a6660280022a660220082c'
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+      '74707574732c20706f6c6963795f6964290049013e6578706563742074696d65'
+      '6465706f7369745f646174756d3a2054696d654465706f736974446174756d20'
+      '3d2074696d656465706f7369745f646174756d005734ae7155ceaab9e5573eae'
+      '815d0aba257489818dd8799f581cbd61dd11567ca6bb8e341e2cd5957cc50724'
+      '12525e43f145b6cd15b8581ca03469e9ffb55592d9badbd35de9cb6525517044'
+      '055cd7001818f640581cc4c5846d83cc27ad145ca5c7eba39734e8e7ae80c509'
+      '9d35f928669c1b00000192510f28031906d61a05265c00581cf0ff48bbb7bbe9'
+      'd59a40f1ce90e9e9d0ff5002ec48f232b49ca0fb9aff0001',
+    ),
+  ),
+  ScriptRef(
+    PlutusV2Script.fromHex(
+      '5906280100003323232323232323232323232222323232322533300c32323253'
+      '3300f300730113754010266666002944028dd7180118091baa00b375a6006602'
+      '46ea802c0104c94ccc040c020c048dd5000899299980a8008a998090070b0991'
+      '9299980b8008a9980a0080b099299980c180d80109999980325000f003001009'
+      '15330150111632533333301c0011533015011161533015011161533015011161'
+      '375a0022a6602a0222c6032002603200464a6666660340022a6602601e2c2a66'
+      '02601e2c2a6602601e2c2a6602601e2c26eb8004c05c004c04cdd50008a99808'
+      '8068b299999980b80508050a998080060b0a998080060b0a998080060b0a9980'
+      '80060b1111119299980a299980a299980a19baf4c103d8798000005153330140'
+      '0614a22a6602a9210f69735f636f6c6c203f2046616c73650014a0264a66602a'
+      '6464a66602e601c60326ea80044c8c94ccc064c8c94ccc06cc04c0045288a999'
+      '80d9809000899299980e19299981098100008a99980e980a180f8008a5115333'
+      '01d3015301f00114a02c2c6ea8c040c07cdd51807980f9baa00713371200200a'
+      '266e20004014dd69810980f1baa00214a060386ea8004c030c070dd51806180e'
+      '1baa004100114a06464a6660346024002294054ccc068c0440044c94ccc06cc9'
+      '4ccc080c07c00454ccc070c04cc0780045288a99980e180a180f0008a5016163'
+      '754601e603c6ea8c03cc078dd5003099b890040011337100080026eb4c080c07'
+      '4dd50010a51301b3754002601660366ea8c030c06cdd50019bad301d301a3754'
+      '0022a660309201396578706563742046696e697465286c6f7765725f626f756e'
+      '6429203d2072616e67652e6c6f7765725f626f756e642e626f756e645f747970'
+      '650016300930193754601260326ea8c070c074c074c074c074c074c074c074c0'
+      '64dd51804980c9baa0043374a90001980d19ba548000cc068cdd2a4004660346'
+      'ea00112f5c06603466602a94530103d87a80004c0103d87980004bd701980d26'
+      '010ad8799fd87b80d87a80ff004bd700a51153301649013e74696d655f656c61'
+      '7073656428636f6e746578742e7472616e73616374696f6e2e76616c69646974'
+      '795f72616e67652c2074696d6529203f2046616c73650014a064a66602a601a6'
+      '02e6ea80044c94ccc06800454cc05c054584c8c94ccc07000454cc06405c584c'
+      '94ccc074c080008526153301a01816325333333021001153301a01816153301a'
+      '01816153301a018161375a0022a660340302c603c002603c00464a66666603e0'
+      '022a6603002c2c2a6603002c2c2a6603002c2c2a6603002c2c26eb8004c07000'
+      '4c060dd50008a9980b00a0b299999980e00288028a9980a8098b0a9980a8098b'
+      '0a9980a8098b0a9980a8098b0a5115330154910d76616c6964203f2046616c73'
+      '650014a02a666028002294454cc0552401117369676e65645f6279203f204661'
+      '6c73650014a029414ccc04cc8cc004004dd6180d180d980d980d980d980d980d'
+      '980d980d980b9baa30073017375400444a66603200229404c94ccc058cdc79ba'
+      'e301c00200614a22660060060026038002294454cc0512413d6c6973742e6861'
+      '7328636f6e746578742e7472616e73616374696f6e2e65787472615f7369676e'
+      '61746f726965732c206372656429203f2046616c73650014a046028002460266'
+      '0280022930a99806a4811856616c696461746f722072657475726e6564206661'
+      '6c7365001365632533300b30030011533300f300e37540082930a998060048b0'
+      'a99980598010008a99980798071baa004149854cc0300245854cc03002458c03'
+      '0dd50019b8748008dc3a4000a66666601e00220022a6601000a2c2a6601000a2'
+      'c2a6601000a2c2a6601000a2c921556578706563742054696d654465706f7369'
+      '74446174756d207b2062656e65666963696172792c20646561646c696e65207d'
+      '3a2054696d654465706f736974446174756d203d0a2020202020202020202064'
+      '6174756d0049011972646d723a2054696d654465706f73697452656465656d65'
+      '7200490123657870656374205f643a2054696d654465706f736974446174756d'
+      '203d20646174756d005734ae7155ceaab9e5573eae815d0aba257489812bd879'
+      '9f581cd5c9e4617211e2ff7c7fd01d0de9ac82e5bb81dc5a5e16b59911866a1b'
+      '00000192eb8df003ff0001',
+    ),
+  ),
+];
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/transaction_output_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/transaction_output_test.dart
index a55aa5f6d1..1bb4512983 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/test/transaction_output_test.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/transaction_output_test.dart
@@ -15,7 +15,7 @@ void main() {
   final datumData = Data(CborBytes(Uint8List.fromList([1, 2, 3, 4, 5, 6])));
   final datumOptionHash = DatumOption(datumHash);
   final datumOptionData = DatumOption(datumData);
-  final script = PlutusV2Script(Uint8List.fromList([0x43, 0x01, 0x02, 0x03]));
+  final script = PlutusV2Script.fromHex('43010203');
   final scriptRef = ScriptRef(script);
 
   group('TransactionOutput encoding/decoding Tests', () {