Don't clone txData slice

op-batcher/batcher/driver.go

@@ -360,12 +360,11 @@ func (l *BatchSubmitter) drainState(receiptsCh chan txmgr.TxReceipt[txData], que
 
 func (l *BatchSubmitter) handleReceipt(r txmgr.TxReceipt[txData]) {
 	// Record TX Status
-	data := r.ID.Bytes()
 	if r.Err != nil {
-		l.log.Warn("unable to publish tx", "err", r.Err, "data_size", len(data))
+		l.log.Warn("unable to publish tx", "err", r.Err, "data_size", r.ID.Len())
 		l.recordFailedTx(r.ID.ID(), r.Err)
 	} else {
-		l.log.Info("tx successfully published", "tx_hash", r.Receipt.TxHash, "data_size", len(data))
+		l.log.Info("tx successfully published", "tx_hash", r.Receipt.TxHash, "data_size", r.ID.Len())
 		l.recordConfirmedTx(r.ID.ID(), r.Receipt)
 	}
 }

op-batcher/batcher/tx_data.go

@@ -26,6 +26,10 @@ func (td *txData) Bytes() []byte {
 	return append([]byte{derive.DerivationVersion0}, td.frame.data...)
 }
 
+func (td *txData) Len() int {
+	return 1 + len(td.frame.data)
+}
+
 // Frame returns the single frame of this tx data.
 //
 // Note: when the batcher is changed to possibly send multiple frames per tx,