diff --git a/src/types/Transaction.test.ts b/src/types/Transaction.test.ts
index d5978e4b..f8e5e2e6 100644
--- a/src/types/Transaction.test.ts
+++ b/src/types/Transaction.test.ts
@@ -19,12 +19,11 @@ import {
   CLValueUInt64
 } from './clvalue';
 import { PublicKey } from './keypair';
-import { PayloadFields, TransactionV1Payload } from './TransactionPayload';
+import { TransactionV1Payload } from './TransactionPayload';
 
 describe('Test Transaction', () => {
   it('should create a Transaction from TransactionV1', async () => {
     const keys = await PrivateKey.generate(KeyAlgorithm.ED25519);
-    const timestamp = new Timestamp(new Date());
     const paymentAmount = 20000000000000;
 
     const pricingMode = new PricingMode();
@@ -43,36 +42,26 @@ describe('Test Transaction', () => {
       id: CLValueOption.newCLOption(CLValueUInt64.newCLUint64(3))
     });
 
-    const transactionTarget = new TransactionTarget(new SessionTarget());
-    const entryPoint = new TransactionEntryPoint(undefined, {});
-    const scheduling = new TransactionScheduling({});
-
-    const payloadFields = new PayloadFields();
-    payloadFields.addField(0, args.toBytes());
-    payloadFields.addField(1, transactionTarget.toBytes());
-    payloadFields.addField(2, entryPoint.bytes());
-    payloadFields.addField(3, scheduling.bytes());
-
-    const transactionPayload = new TransactionV1Payload();
-    transactionPayload.initiatorAddr = new InitiatorAddr(keys.publicKey);
-    transactionPayload.ttl = new Duration(1800000);
-    transactionPayload.args = args;
-    transactionPayload.entryPoint = entryPoint;
-    transactionPayload.pricingMode = pricingMode;
-    transactionPayload.timestamp = timestamp;
-    transactionPayload.category = 2;
-    transactionPayload.target = transactionTarget;
-    transactionPayload.scheduling = scheduling;
-    transactionPayload.chainName = 'casper-net-1';
-    transactionPayload.fields = payloadFields;
+    const transactionPayload = TransactionV1Payload.build({
+      initiatorAddr: new InitiatorAddr(keys.publicKey),
+      ttl: new Duration(1800000),
+      args,
+      timestamp: new Timestamp(new Date()),
+      category: 2,
+      entryPoint: new TransactionEntryPoint(undefined, {}),
+      scheduling: new TransactionScheduling({}),
+      transactionTarget: new TransactionTarget(new SessionTarget()),
+      chainName: 'casper-net-1',
+      pricingMode
+    });
 
     const transaction = TransactionV1.makeTransactionV1(transactionPayload);
     await transaction.sign(keys);
 
-    // const toJson = TransactionV1.toJson(transaction);
-    // const parsed = TransactionV1.fromJSON(toJson);
+    const toJson = TransactionV1.toJson(transaction);
+    console.log(toJson);
 
-    // console.log(Args.fromBytes(transaction.payload.fields.fields.get(0)!));
+    // const parsed = TransactionV1.fromJSON(toJson);
 
     // const transactionPaymentAmount = parsed.body.args.args
     //   .get('amount')!
diff --git a/src/types/Transaction.ts b/src/types/Transaction.ts
index bed56ddb..506e7eee 100644
--- a/src/types/Transaction.ts
+++ b/src/types/Transaction.ts
@@ -148,7 +148,6 @@ export class TransactionV1 {
    * @throws {TransactionError} Throws errors if validation fails.
    */
   public validate(): boolean {
-    console.log(this.payload);
     const payloadBytes = this.payload!.toBytes();
     const calculatedHash = new Hash(byteHash(payloadBytes));
 
@@ -401,7 +400,7 @@ export class TransactionBody {
    * The category of the transaction, indicating its type (e.g., minting, auction).
    */
   @jsonMember({ name: 'transaction_category', constructor: Number })
-  public category: number;
+  public category?: number;
 
   /**
    * Constructs a `TransactionBody` with the given arguments, target, entry point, scheduling, and category.
@@ -416,7 +415,7 @@ export class TransactionBody {
     target: TransactionTarget,
     entryPoint: TransactionEntryPoint,
     scheduling: TransactionScheduling,
-    category: number
+    category?: number
   ) {
     this.args = args;
     this.target = target;
diff --git a/src/types/TransactionPayload.ts b/src/types/TransactionPayload.ts
index e1450d2d..41c05a13 100644
--- a/src/types/TransactionPayload.ts
+++ b/src/types/TransactionPayload.ts
@@ -19,6 +19,19 @@ import {
   byteArrayJsonSerializer
 } from './SerializationUtils';
 
+interface ITransactionPayloadBuildParams {
+  initiatorAddr: InitiatorAddr;
+  args: Args;
+  ttl: Duration;
+  entryPoint: TransactionEntryPoint;
+  pricingMode: PricingMode;
+  timestamp: Timestamp;
+  category?: number;
+  transactionTarget: TransactionTarget;
+  scheduling: TransactionScheduling;
+  chainName: string;
+}
+
 export class PayloadFields {
   public fields: Map<number, Uint8Array> = new Map();
 
@@ -125,7 +138,7 @@ export class TransactionV1Payload {
   public target: TransactionTarget;
   public entryPoint: TransactionEntryPoint;
   public scheduling: TransactionScheduling;
-  public category: number;
+  public category?: number;
 
   public toBytes(): Uint8Array {
     const calltableSerialization = new CalltableSerialization();
@@ -147,4 +160,38 @@ export class TransactionV1Payload {
 
     return calltableSerialization.toBytes();
   }
+
+  public static build({
+    initiatorAddr,
+    args,
+    ttl,
+    entryPoint,
+    pricingMode,
+    timestamp,
+    category,
+    transactionTarget,
+    scheduling,
+    chainName
+  }: ITransactionPayloadBuildParams): TransactionV1Payload {
+    const payloadFields = new PayloadFields();
+    payloadFields.addField(0, args.toBytes());
+    payloadFields.addField(1, transactionTarget.toBytes());
+    payloadFields.addField(2, entryPoint.bytes());
+    payloadFields.addField(3, scheduling.bytes());
+
+    const transactionPayload = new TransactionV1Payload();
+    transactionPayload.initiatorAddr = initiatorAddr;
+    transactionPayload.ttl = ttl;
+    transactionPayload.args = args;
+    transactionPayload.entryPoint = entryPoint;
+    transactionPayload.pricingMode = pricingMode;
+    transactionPayload.timestamp = timestamp;
+    transactionPayload.category = category;
+    transactionPayload.target = transactionTarget;
+    transactionPayload.scheduling = scheduling;
+    transactionPayload.chainName = chainName;
+    transactionPayload.fields = payloadFields;
+
+    return transactionPayload;
+  }
 }