fix(sdk-coin-apt): use NoAccountAuthenticator for transaction simulation

TICKET: COIN-3065

Author: bhavidhingra

modules/sdk-coin-apt/src/lib/transaction/transaction.ts

@@ -10,7 +10,9 @@ import {
 import { BaseCoin as CoinConfig } from '@bitgo/statics';
 import {
   AccountAddress,
+  AccountAuthenticator,
   AccountAuthenticatorEd25519,
+  AccountAuthenticatorNoAccountAuthenticator,
   DEFAULT_MAX_GAS_AMOUNT,
   Ed25519PublicKey,
   Ed25519Signature,
@@ -44,6 +46,7 @@ export abstract class Transaction extends BaseTransaction {
   protected _expirationTime: number;
   protected _feePayerAddress: string;
   protected _assetId: string;
+  protected _isSimulateTxn: boolean;
 
   static EMPTY_PUBLIC_KEY = Buffer.alloc(32);
   static EMPTY_SIGNATURE = Buffer.alloc(64);
@@ -57,6 +60,7 @@ export abstract class Transaction extends BaseTransaction {
     this._sequenceNumber = 0;
     this._sender = AccountAddress.ZERO.toString();
     this._assetId = AccountAddress.ZERO.toString();
+    this._isSimulateTxn = false;
     this._senderSignature = {
       publicKey: {
         pub: Hex.fromHexInput(Transaction.EMPTY_PUBLIC_KEY).toString(),
@@ -150,6 +154,14 @@ export abstract class Transaction extends BaseTransaction {
     this._assetId = value;
   }
 
+  get isSimulateTxn(): boolean {
+    return this._isSimulateTxn;
+  }
+
+  set isSimulateTxn(value: boolean) {
+    this._isSimulateTxn = value;
+  }
+
   protected abstract buildRawTransaction(): void;
 
   protected abstract parseTransactionPayload(payload: TransactionPayload): void;
@@ -196,17 +208,22 @@ export abstract class Transaction extends BaseTransaction {
   }
 
   serialize(): string {
-    const senderPublicKeyBuffer = utils.getBufferFromHexString(this._senderSignature.publicKey.pub);
-    const senderPublicKey = new Ed25519PublicKey(senderPublicKeyBuffer);
-
-    const senderSignature = new Ed25519Signature(this._senderSignature.signature);
-    const senderAuthenticator = new AccountAuthenticatorEd25519(senderPublicKey, senderSignature);
-
-    const feePayerPublicKeyBuffer = utils.getBufferFromHexString(this._feePayerSignature.publicKey.pub);
-    const feePayerPublicKey = new Ed25519PublicKey(feePayerPublicKeyBuffer);
-
-    const feePayerSignature = new Ed25519Signature(this._feePayerSignature.signature);
-    const feePayerAuthenticator = new AccountAuthenticatorEd25519(feePayerPublicKey, feePayerSignature);
+    let senderAuthenticator: AccountAuthenticator;
+    let feePayerAuthenticator: AccountAuthenticator;
+    if (this.isSimulateTxn) {
+      senderAuthenticator = new AccountAuthenticatorNoAccountAuthenticator();
+      feePayerAuthenticator = new AccountAuthenticatorNoAccountAuthenticator();
+    } else {
+      const senderPublicKeyBuffer = utils.getBufferFromHexString(this._senderSignature.publicKey.pub);
+      const senderPublicKey = new Ed25519PublicKey(senderPublicKeyBuffer);
+      const senderSignature = new Ed25519Signature(this._senderSignature.signature);
+      senderAuthenticator = new AccountAuthenticatorEd25519(senderPublicKey, senderSignature);
+
+      const feePayerPublicKeyBuffer = utils.getBufferFromHexString(this._feePayerSignature.publicKey.pub);
+      const feePayerPublicKey = new Ed25519PublicKey(feePayerPublicKeyBuffer);
+      const feePayerSignature = new Ed25519Signature(this._feePayerSignature.signature);
+      feePayerAuthenticator = new AccountAuthenticatorEd25519(feePayerPublicKey, feePayerSignature);
+    }
 
     const txnAuthenticator = new TransactionAuthenticatorFeePayer(senderAuthenticator, [], [], {
       address: AccountAddress.fromString(this._feePayerAddress),

modules/sdk-coin-apt/src/lib/transactionBuilder/transactionBuilder.ts

@@ -100,6 +100,10 @@ export abstract class TransactionBuilder extends BaseTransactionBuilder {
     this.transaction.addFeePayerSignature(publicKey, signature);
   }
 
+  setIsSimulateTxn(value: boolean): void {
+    this.transaction.isSimulateTxn = value;
+  }
+
   /** @inheritdoc */
   protected fromImplementation(rawTransaction: string): Transaction {
     this.transaction.fromRawTransaction(rawTransaction);

modules/sdk-coin-apt/test/unit/transactionBuilder/transferBuilder.ts

@@ -21,6 +21,7 @@ describe('Apt Transfer Transaction', () => {
         txBuilder.sequenceNumber(14);
         txBuilder.expirationTime(1736246155);
         txBuilder.addFeePayerAddress(testData.feePayer.address);
+        txBuilder.setIsSimulateTxn(true);
         const tx = (await txBuilder.build()) as TransferTransaction;
         should.equal(tx.sender, testData.sender2.address);
         should.equal(tx.recipient.address, testData.recipients[0].address);
@@ -45,7 +46,7 @@ describe('Apt Transfer Transaction', () => {
         const rawTx = tx.toBroadcastFormat();
         should.equal(txBuilder.isValidRawTransaction(rawTx), true);
         rawTx.should.equal(
-          '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'
+          '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'
         );
       });
 
@@ -178,6 +179,7 @@ describe('Apt Transfer Transaction', () => {
       txBuilder.expirationTime(1736246155);
       txBuilder.assetId(testData.LEGACY_COIN);
       txBuilder.addFeePayerAddress(testData.feePayer.address);
+      txBuilder.setIsSimulateTxn(true);
       const tx = (await txBuilder.build()) as TransferTransaction;
       should.equal(tx.sender, testData.sender2.address);
       should.equal(tx.recipient.address, testData.recipients[0].address);
@@ -202,7 +204,7 @@ describe('Apt Transfer Transaction', () => {
       const rawTx = tx.toBroadcastFormat();
       should.equal(txBuilder.isValidRawTransaction(rawTx), true);
       rawTx.should.equal(
-        '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'
+        '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'
       );
     });