diff --git a/internal/sender/common.go b/internal/sender/common.go
index 29cb1af4b..272aa4213 100644
--- a/internal/sender/common.go
+++ b/internal/sender/common.go
@@ -44,7 +44,7 @@ func (s *Sender) adjustGas(txData types.TxData) {
 		blobFeeCap = utils.Min(blobFeeCap, s.MaxBlobFee)
 		baseTx.BlobFeeCap = uint256.NewInt(blobFeeCap)
 	default:
-		log.Warn("Unsupported transaction type when adjust gas fee", "from", s.Opts.From)
+		log.Warn("Unsupported transaction type when adjust gas fee", "from", s.opts.From)
 	}
 }
 
@@ -52,9 +52,9 @@ func (s *Sender) adjustGas(txData types.TxData) {
 func (s *Sender) SetNonce(txData types.TxData, adjust bool) (err error) {
 	var nonce uint64
 	if adjust {
-		s.nonce, err = s.client.NonceAt(s.ctx, s.Opts.From, nil)
+		s.nonce, err = s.client.NonceAt(s.ctx, s.opts.From, nil)
 		if err != nil {
-			log.Warn("Failed to get the nonce", "from", s.Opts.From, "err", err)
+			log.Warn("Failed to get the nonce", "from", s.opts.From, "err", err)
 			return err
 		}
 	}
@@ -97,8 +97,8 @@ func (s *Sender) updateGasTipGasFee(head *types.Header) error {
 		gasTipCap = new(big.Int).Set(maxGasFee)
 	}
 
-	s.Opts.GasTipCap = gasTipCap
-	s.Opts.GasFeeCap = gasFeeCap
+	s.opts.GasTipCap = gasTipCap
+	s.opts.GasFeeCap = gasFeeCap
 
 	return nil
 }
@@ -111,8 +111,8 @@ func (s *Sender) buildTxData(tx *types.Transaction) (types.TxData, error) {
 			ChainID:    s.client.ChainID,
 			To:         tx.To(),
 			Nonce:      tx.Nonce(),
-			GasFeeCap:  s.Opts.GasFeeCap,
-			GasTipCap:  s.Opts.GasTipCap,
+			GasFeeCap:  s.opts.GasFeeCap,
+			GasTipCap:  s.opts.GasTipCap,
 			Gas:        tx.Gas(),
 			Value:      tx.Value(),
 			Data:       tx.Data(),
@@ -127,8 +127,8 @@ func (s *Sender) buildTxData(tx *types.Transaction) (types.TxData, error) {
 			ChainID:    uint256.MustFromBig(s.client.ChainID),
 			To:         to,
 			Nonce:      tx.Nonce(),
-			GasFeeCap:  uint256.MustFromBig(s.Opts.GasFeeCap),
-			GasTipCap:  uint256.MustFromBig(s.Opts.GasTipCap),
+			GasFeeCap:  uint256.MustFromBig(s.opts.GasFeeCap),
+			GasTipCap:  uint256.MustFromBig(s.opts.GasTipCap),
 			Gas:        tx.Gas(),
 			Value:      uint256.MustFromBig(tx.Value()),
 			Data:       tx.Data(),
diff --git a/internal/sender/sender.go b/internal/sender/sender.go
index dd46d7793..b90b88639 100644
--- a/internal/sender/sender.go
+++ b/internal/sender/sender.go
@@ -79,7 +79,7 @@ type Sender struct {
 	client *rpc.EthClient
 
 	nonce uint64
-	Opts  *bind.TransactOpts
+	opts  *bind.TransactOpts
 
 	unconfirmedTxs cmap.ConcurrentMap[string, *TxToConfirm]
 	txToConfirmCh  cmap.ConcurrentMap[string, chan *TxToConfirm]
@@ -129,7 +129,7 @@ func NewSender(ctx context.Context, cfg *Config, client *rpc.EthClient, priv *ec
 		head:           head,
 		client:         client,
 		nonce:          nonce,
-		Opts:           opts,
+		opts:           opts,
 		unconfirmedTxs: cmap.New[*TxToConfirm](),
 		txToConfirmCh:  cmap.New[chan *TxToConfirm](),
 		stopCh:         make(chan struct{}),
@@ -154,6 +154,22 @@ func (s *Sender) Close() {
 	s.wg.Wait()
 }
 
+// GetOpts returns the transaction options of the sender.
+func (s *Sender) GetOpts() *bind.TransactOpts {
+	return &bind.TransactOpts{
+		From:      s.opts.From,
+		Nonce:     s.opts.Nonce,
+		Signer:    s.opts.Signer,
+		Value:     s.opts.Value,
+		GasPrice:  s.opts.GasPrice,
+		GasFeeCap: s.opts.GasFeeCap,
+		GasTipCap: s.opts.GasTipCap,
+		GasLimit:  s.opts.GasLimit,
+		Context:   s.opts.Context,
+		NoSend:    s.opts.NoSend,
+	}
+}
+
 // TxToConfirmChannel returns a channel to wait the given transaction's confirmation.
 func (s *Sender) TxToConfirmChannel(txID string) <-chan *TxToConfirm {
 	ch, ok := s.txToConfirmCh.Get(txID)
@@ -191,12 +207,12 @@ func (s *Sender) SendRawTransaction(nonce uint64, target *common.Address, value
 	if gasLimit == 0 {
 		var err error
 		gasLimit, err = s.client.EstimateGas(s.ctx, ethereum.CallMsg{
-			From:      s.Opts.From,
+			From:      s.opts.From,
 			To:        target,
 			Value:     value,
 			Data:      data,
-			GasTipCap: s.Opts.GasTipCap,
-			GasFeeCap: s.Opts.GasFeeCap,
+			GasTipCap: s.opts.GasTipCap,
+			GasFeeCap: s.opts.GasFeeCap,
 		})
 		if err != nil {
 			return "", err
@@ -210,8 +226,8 @@ func (s *Sender) SendRawTransaction(nonce uint64, target *common.Address, value
 			ChainID:   s.client.ChainID,
 			To:        target,
 			Nonce:     nonce,
-			GasFeeCap: s.Opts.GasFeeCap,
-			GasTipCap: s.Opts.GasTipCap,
+			GasFeeCap: s.opts.GasFeeCap,
+			GasTipCap: s.opts.GasTipCap,
 			Gas:       gasLimit,
 			Value:     value,
 			Data:      data,
@@ -285,7 +301,7 @@ func (s *Sender) send(tx *TxToConfirm, resetNonce bool) error {
 
 	for i := 0; i < nonceIncorrectRetrys; i++ {
 		// Retry when nonce is incorrect
-		rawTx, err := s.Opts.Signer(s.Opts.From, types.NewTx(originalTx))
+		rawTx, err := s.opts.Signer(s.opts.From, types.NewTx(originalTx))
 		if err != nil {
 			return err
 		}
diff --git a/internal/sender/sender_test.go b/internal/sender/sender_test.go
index 325ae43d7..0cf15879b 100644
--- a/internal/sender/sender_test.go
+++ b/internal/sender/sender_test.go
@@ -25,7 +25,7 @@ type SenderTestSuite struct {
 
 func (s *SenderTestSuite) TestSendTransaction() {
 	var (
-		opts   = s.sender.Opts
+		opts   = s.sender.GetOpts()
 		client = s.RPCClient.L1
 		eg     errgroup.Group
 	)
@@ -57,7 +57,7 @@ func (s *SenderTestSuite) TestSendTransaction() {
 }
 
 func (s *SenderTestSuite) TestSendRawTransaction() {
-	nonce, err := s.RPCClient.L1.NonceAt(context.Background(), s.sender.Opts.From, nil)
+	nonce, err := s.RPCClient.L1.NonceAt(context.Background(), s.sender.GetOpts().From, nil)
 	s.Nil(err)
 
 	var eg errgroup.Group
@@ -82,14 +82,15 @@ func (s *SenderTestSuite) TestSendRawTransaction() {
 func (s *SenderTestSuite) TestReplacement() {
 	send := s.sender
 	client := s.RPCClient.L1
+	opts := send.GetOpts()
 
 	// Let max gas price be 2 times of the gas fee cap.
-	send.MaxGasFee = send.Opts.GasFeeCap.Uint64() * 2
+	send.MaxGasFee = opts.GasFeeCap.Uint64() * 2
 
-	nonce, err := client.NonceAt(context.Background(), send.Opts.From, nil)
+	nonce, err := client.NonceAt(context.Background(), opts.From, nil)
 	s.Nil(err)
 
-	pendingNonce, err := client.PendingNonceAt(context.Background(), send.Opts.From)
+	pendingNonce, err := client.PendingNonceAt(context.Background(), opts.From)
 	s.Nil(err)
 	// Run test only if mempool has no pending transactions.
 	if pendingNonce > nonce {
@@ -107,7 +108,7 @@ func (s *SenderTestSuite) TestReplacement() {
 		Value:     big.NewInt(1),
 		Data:      nil,
 	}
-	rawTx, err := send.Opts.Signer(send.Opts.From, types.NewTx(baseTx))
+	rawTx, err := send.GetOpts().Signer(send.GetOpts().From, types.NewTx(baseTx))
 	s.Nil(err)
 	err = client.SendTransaction(context.Background(), rawTx)
 	s.Nil(err)
@@ -138,10 +139,11 @@ func (s *SenderTestSuite) TestReplacement() {
 func (s *SenderTestSuite) TestNonceTooLow() {
 	client := s.RPCClient.L1
 	send := s.sender
+	opts := s.sender.GetOpts()
 
-	nonce, err := client.NonceAt(context.Background(), send.Opts.From, nil)
+	nonce, err := client.NonceAt(context.Background(), opts.From, nil)
 	s.Nil(err)
-	pendingNonce, err := client.PendingNonceAt(context.Background(), send.Opts.From)
+	pendingNonce, err := client.PendingNonceAt(context.Background(), opts.From)
 	s.Nil(err)
 	// Run test only if mempool has no pending transactions.
 	if pendingNonce > nonce {
diff --git a/proposer/proposer.go b/proposer/proposer.go
index 16b2e6bf0..d3902d05e 100644
--- a/proposer/proposer.go
+++ b/proposer/proposer.go
@@ -339,7 +339,7 @@ func (p *Proposer) makeBlobProposeBlockTx(
 		return nil, err
 	}
 
-	opts := p.sender.Opts
+	opts := p.sender.GetOpts()
 	opts.Value = maxFee
 	rawTx, err := p.rpc.TaikoL1.ProposeBlock(
 		opts,
@@ -375,7 +375,7 @@ func (p *Proposer) makeCalldataProposeBlockTx(
 		return nil, err
 	}
 
-	opts := p.sender.Opts
+	opts := p.sender.GetOpts()
 	opts.Value = maxFee
 
 	var parentMetaHash = [32]byte{}
diff --git a/proposer/proposer_test.go b/proposer/proposer_test.go
index fe5a691d9..96c74ee56 100644
--- a/proposer/proposer_test.go
+++ b/proposer/proposer_test.go
@@ -159,7 +159,7 @@ func (s *ProposerTestSuite) TestSendProposeBlockTx() {
 	s.Nil(sender.SetNonce(nil, true))
 
 	fee := big.NewInt(10000)
-	opts := sender.Opts
+	opts := sender.GetOpts()
 	opts.Value = fee
 	s.Greater(opts.GasTipCap.Uint64(), uint64(0))