diff --git a/packages/module/src/common/helpers/index.ts b/packages/module/src/common/helpers/index.ts
index c71746fe1..574918c2f 100644
--- a/packages/module/src/common/helpers/index.ts
+++ b/packages/module/src/common/helpers/index.ts
@@ -1,4 +1,2 @@
 export * from './generateNonce';
-export * from './mergeSignatures';
 export * from './readPlutusData';
-export * from './readTransaction';
diff --git a/packages/module/src/common/helpers/readTransaction.ts b/packages/module/src/common/helpers/readTransaction.ts
deleted file mode 100644
index 71a1e00fb..000000000
--- a/packages/module/src/common/helpers/readTransaction.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-import { csl } from '@mesh/core';
-import { deserializeTx } from '@mesh/common/utils';
-
-export const readTransaction = (tx: string): csl.TransactionJSON => {
-  return deserializeTx(tx).to_js_value();
-};
diff --git a/packages/module/src/core/CPS-009.ts b/packages/module/src/core/CPS0009.ts
similarity index 96%
rename from packages/module/src/core/CPS-009.ts
rename to packages/module/src/core/CPS0009.ts
index 2cd0d9c22..cc03c8f06 100644
--- a/packages/module/src/core/CPS-009.ts
+++ b/packages/module/src/core/CPS0009.ts
@@ -1,130 +1,130 @@
-import type { Quantity, UTxO, Unit } from '@mesh/common/types';
-
-export const selectUtxos = (
-  inputs: UTxO[],
-  requiredAssets: Map<Unit, Quantity>,
-  threshold: Quantity
-): UTxO[] => {
-  const totalRequiredAssets = new Map<Unit, Quantity>(requiredAssets);
-  totalRequiredAssets.set(
-    'lovelace',
-    String(Number(totalRequiredAssets.get('lovelace')) + Number(threshold))
-  );
-  const utxoMap = new Map<number, UTxO>();
-  for (let i = 0; i < inputs.length; i++) {
-    utxoMap.set(i, inputs[i]);
-  }
-  const selectedInputs = new Set<number>();
-  const onlyLovelace = new Set<number>();
-  const singletons = new Set<number>();
-  const pairs = new Set<number>();
-  const rest = new Set<number>();
-  for (let i = 0; i < inputs.length; i++) {
-    switch (inputs[i].output.amount.length) {
-      case 1: {
-        onlyLovelace.add(i);
-        break;
-      }
-      case 2: {
-        singletons.add(i);
-        break;
-      }
-      case 3: {
-        pairs.add(i);
-        break;
-      }
-      default: {
-        rest.add(i);
-        break;
-      }
-    }
-  }
-
-  const addUtxoWithAssetAmount = (
-    inputIndex: number,
-    assetUnit: string,
-    set: Set<number>
-  ) => {
-    const utxo = utxoMap.get(inputIndex);
-    if (!utxo) return;
-
-    const amount = getAssetAmount(utxo, assetUnit);
-    if (Number(amount) > 0) {
-      selectedInputs.add(inputIndex);
-      set.delete(inputIndex);
-      for (const asset of utxo.output.amount) {
-        totalRequiredAssets.set(
-          asset.unit,
-          String(
-            Number(totalRequiredAssets.get(asset.unit)) - Number(asset.quantity)
-          )
-        );
-      }
-    }
-  };
-
-  for (const assetUnit of totalRequiredAssets.keys()) {
-    if (assetUnit == 'lovelace') continue;
-    for (const inputIndex of singletons) {
-      const assetRequired = totalRequiredAssets.get(assetUnit);
-      if (!assetRequired || Number(assetRequired) <= 0) break;
-      addUtxoWithAssetAmount(inputIndex, assetUnit, singletons);
-    }
-
-    for (const inputIndex of pairs) {
-      const assetRequired = totalRequiredAssets.get(assetUnit);
-      if (!assetRequired || Number(assetRequired) <= 0) break;
-      addUtxoWithAssetAmount(inputIndex, assetUnit, pairs);
-    }
-
-    for (const inputIndex of rest) {
-      const assetRequired = totalRequiredAssets.get(assetUnit);
-      if (!assetRequired || Number(assetRequired) <= 0) break;
-      addUtxoWithAssetAmount(inputIndex, assetUnit, rest);
-    }
-  }
-
-  for (const inputIndex of onlyLovelace) {
-    const assetRequired = totalRequiredAssets.get('lovelace');
-    if (!assetRequired || Number(assetRequired) <= 0) break;
-    addUtxoWithAssetAmount(inputIndex, 'lovelace', onlyLovelace);
-  }
-
-  for (const inputIndex of singletons) {
-    const assetRequired = totalRequiredAssets.get('lovelace');
-    if (!assetRequired || Number(assetRequired) <= 0) break;
-    addUtxoWithAssetAmount(inputIndex, 'lovelace', singletons);
-  }
-
-  for (const inputIndex of pairs) {
-    const assetRequired = totalRequiredAssets.get('lovelace');
-    if (!assetRequired || Number(assetRequired) <= 0) break;
-    addUtxoWithAssetAmount(inputIndex, 'lovelace', pairs);
-  }
-
-  for (const inputIndex of rest) {
-    const assetRequired = totalRequiredAssets.get('lovelace');
-    if (!assetRequired || Number(assetRequired) <= 0) break;
-    addUtxoWithAssetAmount(inputIndex, 'lovelace', rest);
-  }
-
-  for (const assetUnit of totalRequiredAssets.keys()) {
-    if (Number(totalRequiredAssets.get(assetUnit)) > 0) return [];
-  }
-
-  const selectedUtxos: UTxO[] = [];
-  for (const inputIndex of selectedInputs) {
-    const utxo = utxoMap.get(inputIndex);
-    if (utxo) {
-      selectedUtxos.push(utxo);
-    }
-  }
-  return selectedUtxos;
-};
-
-const getAssetAmount = (utxo: UTxO, assetUnit: string): string => {
-  for (const utxoAsset of utxo.output.amount) {
-    if (utxoAsset.unit == assetUnit) return utxoAsset.quantity;
-  }
-  return '0';
-};
+import type { Quantity, UTxO, Unit } from '@mesh/common/types';
+
+export const selectUtxos = (
+  inputs: UTxO[],
+  requiredAssets: Map<Unit, Quantity>,
+  threshold: Quantity
+): UTxO[] => {
+  const totalRequiredAssets = new Map<Unit, Quantity>(requiredAssets);
+  totalRequiredAssets.set(
+    'lovelace',
+    String(Number(totalRequiredAssets.get('lovelace')) + Number(threshold))
+  );
+  const utxoMap = new Map<number, UTxO>();
+  for (let i = 0; i < inputs.length; i++) {
+    utxoMap.set(i, inputs[i]);
+  }
+  const selectedInputs = new Set<number>();
+  const onlyLovelace = new Set<number>();
+  const singletons = new Set<number>();
+  const pairs = new Set<number>();
+  const rest = new Set<number>();
+  for (let i = 0; i < inputs.length; i++) {
+    switch (inputs[i].output.amount.length) {
+      case 1: {
+        onlyLovelace.add(i);
+        break;
+      }
+      case 2: {
+        singletons.add(i);
+        break;
+      }
+      case 3: {
+        pairs.add(i);
+        break;
+      }
+      default: {
+        rest.add(i);
+        break;
+      }
+    }
+  }
+
+  const addUtxoWithAssetAmount = (
+    inputIndex: number,
+    assetUnit: string,
+    set: Set<number>
+  ) => {
+    const utxo = utxoMap.get(inputIndex);
+    if (!utxo) return;
+
+    const amount = getAssetAmount(utxo, assetUnit);
+    if (Number(amount) > 0) {
+      selectedInputs.add(inputIndex);
+      set.delete(inputIndex);
+      for (const asset of utxo.output.amount) {
+        totalRequiredAssets.set(
+          asset.unit,
+          String(
+            Number(totalRequiredAssets.get(asset.unit)) - Number(asset.quantity)
+          )
+        );
+      }
+    }
+  };
+
+  for (const assetUnit of totalRequiredAssets.keys()) {
+    if (assetUnit == 'lovelace') continue;
+    for (const inputIndex of singletons) {
+      const assetRequired = totalRequiredAssets.get(assetUnit);
+      if (!assetRequired || Number(assetRequired) <= 0) break;
+      addUtxoWithAssetAmount(inputIndex, assetUnit, singletons);
+    }
+
+    for (const inputIndex of pairs) {
+      const assetRequired = totalRequiredAssets.get(assetUnit);
+      if (!assetRequired || Number(assetRequired) <= 0) break;
+      addUtxoWithAssetAmount(inputIndex, assetUnit, pairs);
+    }
+
+    for (const inputIndex of rest) {
+      const assetRequired = totalRequiredAssets.get(assetUnit);
+      if (!assetRequired || Number(assetRequired) <= 0) break;
+      addUtxoWithAssetAmount(inputIndex, assetUnit, rest);
+    }
+  }
+
+  for (const inputIndex of onlyLovelace) {
+    const assetRequired = totalRequiredAssets.get('lovelace');
+    if (!assetRequired || Number(assetRequired) <= 0) break;
+    addUtxoWithAssetAmount(inputIndex, 'lovelace', onlyLovelace);
+  }
+
+  for (const inputIndex of singletons) {
+    const assetRequired = totalRequiredAssets.get('lovelace');
+    if (!assetRequired || Number(assetRequired) <= 0) break;
+    addUtxoWithAssetAmount(inputIndex, 'lovelace', singletons);
+  }
+
+  for (const inputIndex of pairs) {
+    const assetRequired = totalRequiredAssets.get('lovelace');
+    if (!assetRequired || Number(assetRequired) <= 0) break;
+    addUtxoWithAssetAmount(inputIndex, 'lovelace', pairs);
+  }
+
+  for (const inputIndex of rest) {
+    const assetRequired = totalRequiredAssets.get('lovelace');
+    if (!assetRequired || Number(assetRequired) <= 0) break;
+    addUtxoWithAssetAmount(inputIndex, 'lovelace', rest);
+  }
+
+  for (const assetUnit of totalRequiredAssets.keys()) {
+    if (Number(totalRequiredAssets.get(assetUnit)) > 0) return [];
+  }
+
+  const selectedUtxos: UTxO[] = [];
+  for (const inputIndex of selectedInputs) {
+    const utxo = utxoMap.get(inputIndex);
+    if (utxo) {
+      selectedUtxos.push(utxo);
+    }
+  }
+  return selectedUtxos;
+};
+
+const getAssetAmount = (utxo: UTxO, assetUnit: string): string => {
+  for (const utxoAsset of utxo.output.amount) {
+    if (utxoAsset.unit == assetUnit) return utxoAsset.quantity;
+  }
+  return '0';
+};
diff --git a/packages/module/src/core/index.ts b/packages/module/src/core/index.ts
index 3b78e74df..0f4a13eab 100644
--- a/packages/module/src/core/index.ts
+++ b/packages/module/src/core/index.ts
@@ -6,4 +6,5 @@ export * from './CIP27';
 export * from './CIP1852';
 export * from './CIP1853';
 export * from './CIP1855';
+export * from './CPS0009';
 export * from './CSL';
diff --git a/packages/module/src/index.ts b/packages/module/src/index.ts
index 3a857be49..450c2d8ac 100644
--- a/packages/module/src/index.ts
+++ b/packages/module/src/index.ts
@@ -1,10 +1,6 @@
 export * from './common/contracts';
 export * from './common/types';
-export {
-  generateNonce,
-  readPlutusData,
-  readTransaction,
-} from './common/helpers';
+export { generateNonce, readPlutusData } from './common/helpers';
 export * from './common/utils/resolver';
 export * from './common/utils/parser';
 export * from './core/CIP2';
diff --git a/packages/module/src/serializer/index.ts b/packages/module/src/serializer/index.ts
new file mode 100644
index 000000000..7f69aae9d
--- /dev/null
+++ b/packages/module/src/serializer/index.ts
@@ -0,0 +1 @@
+export * from './signatures';
diff --git a/packages/module/src/common/helpers/mergeSignatures.ts b/packages/module/src/serializer/signatures.ts
similarity index 82%
rename from packages/module/src/common/helpers/mergeSignatures.ts
rename to packages/module/src/serializer/signatures.ts
index 696b81d96..25e43aa34 100644
--- a/packages/module/src/common/helpers/mergeSignatures.ts
+++ b/packages/module/src/serializer/signatures.ts
@@ -1,10 +1,9 @@
 import { csl } from '@mesh/core';
-import type {
-  TransactionWitnessSet, Vkeywitnesses,
-} from '@mesh/core';
+import type { TransactionWitnessSet, Vkeywitnesses } from '@mesh/core';
 
 export const mergeSignatures = (
-  txWitnessSet: TransactionWitnessSet, newSignatures: Vkeywitnesses,
+  txWitnessSet: TransactionWitnessSet,
+  newSignatures: Vkeywitnesses
 ) => {
   const txSignatures = txWitnessSet.vkeys();
 
diff --git a/packages/module/src/transaction/meshTxBuilder/meshTxBuilderCore.ts b/packages/module/src/transaction/meshTxBuilder/meshTxBuilderCore.ts
index fa6b6f58f..f48132dce 100644
--- a/packages/module/src/transaction/meshTxBuilder/meshTxBuilderCore.ts
+++ b/packages/module/src/transaction/meshTxBuilder/meshTxBuilderCore.ts
@@ -39,7 +39,7 @@ import {
   Certificate,
   TxInParameter,
 } from './type';
-import { selectUtxos } from '@mesh/core/CPS-009';
+import { selectUtxos } from '@mesh/core';
 import JSONbig from 'json-bigint';
 
 export class MeshTxBuilderCore {
diff --git a/packages/module/src/wallet/app.service.ts b/packages/module/src/wallet/app.service.ts
index 7015d04ee..c0cdcdb3b 100644
--- a/packages/module/src/wallet/app.service.ts
+++ b/packages/module/src/wallet/app.service.ts
@@ -6,7 +6,7 @@ import {
   ISigner,
   ISubmitter,
 } from '@mesh/common/contracts';
-import { mergeSignatures } from '@mesh/common/helpers';
+import { mergeSignatures } from '@mesh/serializer';
 import {
   deserializeTx,
   toAddress,
diff --git a/packages/module/src/wallet/browser.service.ts b/packages/module/src/wallet/browser.service.ts
index c9dcb85d1..1b24aab9b 100644
--- a/packages/module/src/wallet/browser.service.ts
+++ b/packages/module/src/wallet/browser.service.ts
@@ -5,7 +5,7 @@ import {
   SUPPORTED_WALLETS,
 } from '@mesh/common/constants';
 import { IInitiator, ISigner, ISubmitter } from '@mesh/common/contracts';
-import { mergeSignatures } from '@mesh/common/helpers';
+import { mergeSignatures } from '@mesh/serializer';
 import {
   deserializeAddress,
   deserializeTx,