diff --git a/sequencing.go b/sequencing.go
index 44c0567..6f2e69a 100644
--- a/sequencing.go
+++ b/sequencing.go
@@ -40,24 +40,15 @@ type BatchVerifier interface {
 	VerifyBatch(ctx context.Context, req VerifyBatchRequest) (*VerifyBatchResponse, error)
 }
 
-// RollupId is a unique identifier for a rollup chain
-type RollupId = []byte
-
-// Tx is a rollup transaction
-type Tx = []byte
-
-// Hash is a cryptographic hash of the Batch
-type Hash = []byte
-
 // Batch is a collection of transactions
 type Batch struct {
-	Transactions []Tx
+	Transactions [][]byte
 }
 
 // SubmitRollupTransactionRequest is a request to submit a transaction from rollup to sequencer
 type SubmitRollupTransactionRequest struct {
-	RollupId RollupId
-	Tx       Tx
+	RollupId []byte
+	Tx       []byte
 }
 
 // SubmitRollupTransactionResponse is a response to submitting a transaction from rollup to sequencer
@@ -66,8 +57,8 @@ type SubmitRollupTransactionResponse struct {
 
 // GetNextBatchRequest is a request to get the next batch of transactions from sequencer to rollup
 type GetNextBatchRequest struct {
-	RollupId      RollupId
-	LastBatchHash Hash
+	RollupId      []byte
+	LastBatchHash []byte
 	MaxBytes      uint64
 }
 
@@ -79,8 +70,8 @@ type GetNextBatchResponse struct {
 
 // VerifyBatchRequest is a request to verify a batch of transactions received from the sequencer
 type VerifyBatchRequest struct {
-	RollupId  RollupId
-	BatchHash Hash
+	RollupId  []byte
+	BatchHash []byte
 }
 
 // VerifyBatchResponse is a response to verifying a batch of transactions received from the sequencer
diff --git a/serialization.go b/serialization.go
index 936bf65..063b257 100644
--- a/serialization.go
+++ b/serialization.go
@@ -8,30 +8,12 @@ import (
 
 // ToProto serializes a batch to a protobuf message.
 func (batch *Batch) ToProto() *pbseq.Batch {
-	return &pbseq.Batch{Transactions: txsToByteSlices(batch.Transactions)}
+	return &pbseq.Batch{Transactions: batch.Transactions}
 }
 
 // FromProto deserializes a batch from a protobuf message.
 func (batch *Batch) FromProto(pb *pbseq.Batch) {
-	batch.Transactions = byteSlicesToTxs(pb.Transactions)
-}
-
-func txsToByteSlices(txs []Tx) [][]byte {
-	if txs == nil {
-		return nil
-	}
-	bytes := make([][]byte, len(txs))
-	copy(bytes, txs)
-	return bytes
-}
-
-func byteSlicesToTxs(bytes [][]byte) []Tx {
-	if len(bytes) == 0 {
-		return nil
-	}
-	txs := make([]Tx, len(bytes))
-	copy(txs, bytes)
-	return txs
+	batch.Transactions = pb.Transactions
 }
 
 // Marshal serializes a batch to a byte slice.
diff --git a/test/dummy.go b/test/dummy.go
index f064cb2..3632350 100644
--- a/test/dummy.go
+++ b/test/dummy.go
@@ -19,19 +19,19 @@ var ErrInvalidRollupId = errors.New("invalid rollup id")
 
 // TransactionQueue is a queue of transactions
 type TransactionQueue struct {
-	queue []sequencing.Tx
+	queue [][]byte
 	mu    sync.Mutex
 }
 
 // NewTransactionQueue creates a new TransactionQueue
 func NewTransactionQueue() *TransactionQueue {
 	return &TransactionQueue{
-		queue: make([]sequencing.Tx, 0),
+		queue: make([][]byte, 0),
 	}
 }
 
 // AddTransaction adds a new transaction to the queue
-func (tq *TransactionQueue) AddTransaction(tx sequencing.Tx) {
+func (tq *TransactionQueue) AddTransaction(tx []byte) {
 	tq.mu.Lock()
 	defer tq.mu.Unlock()
 	tq.queue = append(tq.queue, tx)