Update txs constructors and helpers

For each tx, move the logic of setting the Type and TxID to separate functions,
so that they can be called when necessary.

In synchronizer, set all the required fields using the `SetID` and `SetType`
for l2txs when needed.  This is necessary because the `ProcessTxs()` works with
`common.PoolL2Tx`, which misses some fields from `common.L2Tx`, and because
`ProcessTxs()` needs the Type to be set, but at the same time `ProcessTxs()`
sets the Nonce, which is required for the `TxID`.

common/l1tx.go

@@ -50,74 +50,88 @@ type L1Tx struct {
 
 // NewL1Tx returns the given L1Tx with the TxId & Type parameters calculated
 // from the L1Tx values
-func NewL1Tx(l1Tx *L1Tx) (*L1Tx, error) {
+func NewL1Tx(tx *L1Tx) (*L1Tx, error) {
-	// calculate TxType
+	txTypeOld := tx.Type
-	var txType TxType
+	if err := tx.SetType(); err != nil {
-	if l1Tx.FromIdx == 0 {
+		return nil, err
-		if l1Tx.ToIdx == Idx(0) {
-			txType = TxTypeCreateAccountDeposit
-		} else if l1Tx.ToIdx >= IdxUserThreshold {
-			txType = TxTypeCreateAccountDepositTransfer
-		} else {
-			return l1Tx, tracerr.Wrap(fmt.Errorf("Can not determine type of L1Tx, invalid ToIdx value: %d", l1Tx.ToIdx))
 	}
-	} else if l1Tx.FromIdx >= IdxUserThreshold {
+	// If original Type doesn't match the correct one, return error
-		if l1Tx.ToIdx == Idx(0) {
+	if txTypeOld != "" && txTypeOld != tx.Type {
-			txType = TxTypeDeposit
+		return nil, tracerr.Wrap(fmt.Errorf("L1Tx.Type: %s, should be: %s",
-		} else if l1Tx.ToIdx == Idx(1) {
+			tx.Type, txTypeOld))
-			txType = TxTypeForceExit
-		} else if l1Tx.ToIdx >= IdxUserThreshold {
-			if l1Tx.DepositAmount.Int64() == int64(0) {
-				txType = TxTypeForceTransfer
-			} else {
-				txType = TxTypeDepositTransfer
-			}
-		} else {
-			return l1Tx, tracerr.Wrap(fmt.Errorf("Can not determine type of L1Tx, invalid ToIdx value: %d", l1Tx.ToIdx))
-		}
-	} else {
-		return l1Tx, tracerr.Wrap(fmt.Errorf("Can not determine type of L1Tx, invalid FromIdx value: %d", l1Tx.FromIdx))
 	}
 
-	if l1Tx.Type != "" && l1Tx.Type != txType {
+	txIDOld := tx.TxID
-		return l1Tx, tracerr.Wrap(fmt.Errorf("L1Tx.Type: %s, should be: %s", l1Tx.Type, txType))
+	if err := tx.SetID(); err != nil {
+		return nil, err
 	}
-	l1Tx.Type = txType
+	// If original TxID doesn't match the correct one, return error
-
+	if txIDOld != (TxID{}) && txIDOld != tx.TxID {
-	txID, err := l1Tx.CalcTxID()
+		return tx, tracerr.Wrap(fmt.Errorf("L1Tx.TxID: %s, should be: %s",
-	if err != nil {
+			tx.TxID.String(), txIDOld.String()))
-		return nil, tracerr.Wrap(err)
 	}
-	l1Tx.TxID = *txID
 
-	return l1Tx, nil
+	return tx, nil
 }
 
-// CalcTxID calculates the TxId of the L1Tx
+// SetType sets the type of the transaction
-func (tx *L1Tx) CalcTxID() (*TxID, error) {
+func (tx *L1Tx) SetType() error {
-	var txID TxID
+	if tx.FromIdx == 0 {
+		if tx.ToIdx == Idx(0) {
+			tx.Type = TxTypeCreateAccountDeposit
+		} else if tx.ToIdx >= IdxUserThreshold {
+			tx.Type = TxTypeCreateAccountDepositTransfer
+		} else {
+			return tracerr.Wrap(fmt.Errorf(
+				"Can not determine type of L1Tx, invalid ToIdx value: %d", tx.ToIdx))
+		}
+	} else if tx.FromIdx >= IdxUserThreshold {
+		if tx.ToIdx == Idx(0) {
+			tx.Type = TxTypeDeposit
+		} else if tx.ToIdx == Idx(1) {
+			tx.Type = TxTypeForceExit
+		} else if tx.ToIdx >= IdxUserThreshold {
+			if tx.DepositAmount.Int64() == int64(0) {
+				tx.Type = TxTypeForceTransfer
+			} else {
+				tx.Type = TxTypeDepositTransfer
+			}
+		} else {
+			return tracerr.Wrap(fmt.Errorf(
+				"Can not determine type of L1Tx, invalid ToIdx value: %d", tx.ToIdx))
+		}
+	} else {
+		return tracerr.Wrap(fmt.Errorf(
+			"Can not determine type of L1Tx, invalid FromIdx value: %d", tx.FromIdx))
+	}
+	return nil
+}
+
+// SetID sets the ID of the transaction.  For L1UserTx uses (ToForgeL1TxsNum,
+// Position), for L1CoordinatorTx uses (BatchNum, Position).
+func (tx *L1Tx) SetID() error {
 	if tx.UserOrigin {
 		if tx.ToForgeL1TxsNum == nil {
-			return nil, tracerr.Wrap(fmt.Errorf("L1Tx.UserOrigin == true && L1Tx.ToForgeL1TxsNum == nil"))
+			return tracerr.Wrap(fmt.Errorf("L1Tx.UserOrigin == true && L1Tx.ToForgeL1TxsNum == nil"))
 		}
-		txID[0] = TxIDPrefixL1UserTx
+		tx.TxID[0] = TxIDPrefixL1UserTx
 		var toForgeL1TxsNumBytes [8]byte
 		binary.BigEndian.PutUint64(toForgeL1TxsNumBytes[:], uint64(*tx.ToForgeL1TxsNum))
-		copy(txID[1:9], toForgeL1TxsNumBytes[:])
+		copy(tx.TxID[1:9], toForgeL1TxsNumBytes[:])
 	} else {
 		if tx.BatchNum == nil {
-			return nil, tracerr.Wrap(fmt.Errorf("L1Tx.UserOrigin == false && L1Tx.BatchNum == nil"))
+			return tracerr.Wrap(fmt.Errorf("L1Tx.UserOrigin == false && L1Tx.BatchNum == nil"))
 		}
-		txID[0] = TxIDPrefixL1CoordTx
+		tx.TxID[0] = TxIDPrefixL1CoordTx
 		var batchNumBytes [8]byte
 		binary.BigEndian.PutUint64(batchNumBytes[:], uint64(*tx.BatchNum))
-		copy(txID[1:9], batchNumBytes[:])
+		copy(tx.TxID[1:9], batchNumBytes[:])
 	}
 	var positionBytes [2]byte
 	binary.BigEndian.PutUint16(positionBytes[:], uint16(tx.Position))
-	copy(txID[9:11], positionBytes[:])
+	copy(tx.TxID[9:11], positionBytes[:])
 
-	return &txID, nil
+	return nil
 }
 
 // Tx returns a *Tx from the L1Tx

common/l2tx.go

@@ -24,38 +24,57 @@ type L2Tx struct {
 
 // NewL2Tx returns the given L2Tx with the TxId & Type parameters calculated
 // from the L2Tx values
-func NewL2Tx(l2Tx *L2Tx) (*L2Tx, error) {
+func NewL2Tx(tx *L2Tx) (*L2Tx, error) {
-	// calculate TxType
+	txTypeOld := tx.Type
-	var txType TxType
+	if err := tx.SetType(); err != nil {
-	if l2Tx.ToIdx == Idx(1) {
+		return nil, err
-		txType = TxTypeExit
+	}
-	} else if l2Tx.ToIdx >= IdxUserThreshold {
+	// If original Type doesn't match the correct one, return error
-		txType = TxTypeTransfer
+	if txTypeOld != "" && txTypeOld != tx.Type {
+		return nil, tracerr.Wrap(fmt.Errorf("L2Tx.Type: %s, should be: %s",
+			tx.Type, txTypeOld))
+	}
+
+	txIDOld := tx.TxID
+	if err := tx.SetID(); err != nil {
+		return nil, err
+	}
+	// If original TxID doesn't match the correct one, return error
+	if txIDOld != (TxID{}) && txIDOld != tx.TxID {
+		return tx, tracerr.Wrap(fmt.Errorf("L2Tx.TxID: %s, should be: %s",
+			tx.TxID.String(), txIDOld.String()))
+	}
+
+	return tx, nil
+}
+
+// SetType sets the type of the transaction.  Uses (FromIdx, Nonce).
+func (tx *L2Tx) SetType() error {
+	if tx.ToIdx == Idx(1) {
+		tx.Type = TxTypeExit
+	} else if tx.ToIdx >= IdxUserThreshold {
+		tx.Type = TxTypeTransfer
 	} else {
-		return l2Tx, tracerr.Wrap(fmt.Errorf("Can not determine type of L2Tx, invalid ToIdx value: %d", l2Tx.ToIdx))
+		return tracerr.Wrap(fmt.Errorf(
+			"cannot determine type of L2Tx, invalid ToIdx value: %d", tx.ToIdx))
 	}
+	return nil
+}
 
-	// if TxType!=l2Tx.TxType return error
+// SetID sets the ID of the transaction
-	if l2Tx.Type != "" && l2Tx.Type != txType {
+func (tx *L2Tx) SetID() error {
-		return l2Tx, tracerr.Wrap(fmt.Errorf("L2Tx.Type: %s, should be: %s", l2Tx.Type, txType))
+	tx.TxID[0] = TxIDPrefixL2Tx
-	}
+	fromIdxBytes, err := tx.FromIdx.Bytes()
-	l2Tx.Type = txType
-
-	var txid [TxIDLen]byte
-	txid[0] = TxIDPrefixL2Tx
-	fromIdxBytes, err := l2Tx.FromIdx.Bytes()
 	if err != nil {
-		return l2Tx, tracerr.Wrap(err)
+		return tracerr.Wrap(err)
 	}
-	copy(txid[1:7], fromIdxBytes[:])
+	copy(tx.TxID[1:7], fromIdxBytes[:])
-	nonceBytes, err := l2Tx.Nonce.Bytes()
+	nonceBytes, err := tx.Nonce.Bytes()
 	if err != nil {
-		return l2Tx, tracerr.Wrap(err)
+		return tracerr.Wrap(err)
 	}
-	copy(txid[7:12], nonceBytes[:])
+	copy(tx.TxID[7:12], nonceBytes[:])
-	l2Tx.TxID = TxID(txid)
+	return nil
-
-	return l2Tx, nil
 }
 
 // Tx returns a *Tx from the L2Tx

common/pooll2tx.go

@@ -50,49 +50,62 @@ type PoolL2Tx struct {
 
 // NewPoolL2Tx returns the given L2Tx with the TxId & Type parameters calculated
 // from the L2Tx values
-func NewPoolL2Tx(poolL2Tx *PoolL2Tx) (*PoolL2Tx, error) {
+func NewPoolL2Tx(tx *PoolL2Tx) (*PoolL2Tx, error) {
-	// calculate TxType
+	txTypeOld := tx.Type
-	var txType TxType
+	if err := tx.SetType(); err != nil {
-	if poolL2Tx.ToIdx >= IdxUserThreshold {
+		return nil, err
-		txType = TxTypeTransfer
+	}
-	} else if poolL2Tx.ToIdx == 1 {
+	// If original Type doesn't match the correct one, return error
-		txType = TxTypeExit
+	if txTypeOld != "" && txTypeOld != tx.Type {
-	} else if poolL2Tx.ToIdx == 0 {
+		return nil, tracerr.Wrap(fmt.Errorf("L2Tx.Type: %s, should be: %s",
-		if poolL2Tx.ToBJJ != nil && poolL2Tx.ToEthAddr == FFAddr {
+			tx.Type, txTypeOld))
-			txType = TxTypeTransferToBJJ
+	}
-		} else if poolL2Tx.ToEthAddr != FFAddr && poolL2Tx.ToEthAddr != EmptyAddr {
+
-			txType = TxTypeTransferToEthAddr
+	txIDOld := tx.TxID
+	if err := tx.SetID(); err != nil {
+		return nil, err
+	}
+	// If original TxID doesn't match the correct one, return error
+	if txIDOld != (TxID{}) && txIDOld != tx.TxID {
+		return tx, tracerr.Wrap(fmt.Errorf("PoolL2Tx.TxID: %s, should be: %s",
+			tx.TxID.String(), txIDOld.String()))
+	}
+
+	return tx, nil
+}
+
+// SetType sets the type of the transaction
+func (tx *PoolL2Tx) SetType() error {
+	if tx.ToIdx >= IdxUserThreshold {
+		tx.Type = TxTypeTransfer
+	} else if tx.ToIdx == 1 {
+		tx.Type = TxTypeExit
+	} else if tx.ToIdx == 0 {
+		if tx.ToBJJ != nil && tx.ToEthAddr == FFAddr {
+			tx.Type = TxTypeTransferToBJJ
+		} else if tx.ToEthAddr != FFAddr && tx.ToEthAddr != EmptyAddr {
+			tx.Type = TxTypeTransferToEthAddr
 		}
 	} else {
-		return nil, tracerr.Wrap(errors.New("malformed transaction"))
+		return tracerr.Wrap(errors.New("malformed transaction"))
 	}
+	return nil
+}
 
-	// if TxType!=poolL2Tx.TxType return error
+// SetID sets the ID of the transaction.  Uses (FromIdx, Nonce).
-	if poolL2Tx.Type != "" && poolL2Tx.Type != txType {
+func (tx *PoolL2Tx) SetID() error {
-		return poolL2Tx, tracerr.Wrap(fmt.Errorf("type: %s, should be: %s", poolL2Tx.Type, txType))
+	tx.TxID[0] = TxIDPrefixL2Tx
-	}
+	fromIdxBytes, err := tx.FromIdx.Bytes()
-	poolL2Tx.Type = txType
-
-	var txid [TxIDLen]byte
-	txid[0] = TxIDPrefixL2Tx
-	fromIdxBytes, err := poolL2Tx.FromIdx.Bytes()
 	if err != nil {
-		return poolL2Tx, tracerr.Wrap(err)
+		return tracerr.Wrap(err)
 	}
-	copy(txid[1:7], fromIdxBytes[:])
+	copy(tx.TxID[1:7], fromIdxBytes[:])
-	nonceBytes, err := poolL2Tx.Nonce.Bytes()
+	nonceBytes, err := tx.Nonce.Bytes()
 	if err != nil {
-		return poolL2Tx, tracerr.Wrap(err)
+		return tracerr.Wrap(err)
 	}
-	copy(txid[7:12], nonceBytes[:])
+	copy(tx.TxID[7:12], nonceBytes[:])
-	txID := TxID(txid)
+	return nil
-
-	// if TxID!=poolL2Tx.TxID return error
-	if poolL2Tx.TxID != (TxID{}) && poolL2Tx.TxID != txID {
-		return poolL2Tx, tracerr.Wrap(fmt.Errorf("id: %s, should be: %s", poolL2Tx.TxID.String(), txID.String()))
-	}
-	poolL2Tx.TxID = txID
-	return poolL2Tx, nil
 }
 
 // TxCompressedData spec:
@@ -305,11 +318,11 @@ func (tx PoolL2Tx) Tx() Tx {
 
 // PoolL2TxsToL2Txs returns an array of []L2Tx from an array of []PoolL2Tx
 func PoolL2TxsToL2Txs(txs []PoolL2Tx) ([]L2Tx, error) {
-	var r []L2Tx
+	l2Txs := make([]L2Tx, len(txs))
-	for _, poolTx := range txs {
+	for i, poolTx := range txs {
-		r = append(r, poolTx.L2Tx())
+		l2Txs[i] = poolTx.L2Tx()
 	}
-	return r, nil
+	return l2Txs, nil
 }
 
 // PoolL2TxState is a struct that represents the status of a L2 transaction

db/historydb/historydb_test.go

@@ -144,9 +144,9 @@ func TestBatches(t *testing.T) {
 		CoordUser:     "A",
 	}
 	blocks, err := tc.GenerateBlocks(set)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = tc.FillBlocksExtra(blocks, &tilCfgExtra)
-	assert.Nil(t, err)
+	require.NoError(t, err)
 	// Insert to DB
 	batches := []common.Batch{}
 	tokensValue := make(map[common.TokenID]float64)
@@ -365,9 +365,9 @@ func TestTxs(t *testing.T) {
 		CoordUser:     "A",
 	}
 	blocks, err := tc.GenerateBlocks(set)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = tc.FillBlocksExtra(blocks, &tilCfgExtra)
-	assert.Nil(t, err)
+	require.NoError(t, err)
 
 	// Sanity check
 	require.Equal(t, 7, len(blocks))
@@ -617,7 +617,7 @@ func TestGetUnforgedL1UserTxs(t *testing.T) {
 	`
 	tc := til.NewContext(128)
 	blocks, err := tc.GenerateBlocks(set)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	// Sanity check
 	require.Equal(t, 1, len(blocks))
 	require.Equal(t, 5, len(blocks[0].Rollup.L1UserTxs))
@@ -626,17 +626,17 @@ func TestGetUnforgedL1UserTxs(t *testing.T) {
 
 	for i := range blocks {
 		err = historyDB.AddBlockSCData(&blocks[i])
-		require.Nil(t, err)
+		require.NoError(t, err)
 	}
 
 	l1UserTxs, err := historyDB.GetUnforgedL1UserTxs(toForgeL1TxsNum)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	assert.Equal(t, 5, len(l1UserTxs))
 	assert.Equal(t, blocks[0].Rollup.L1UserTxs, l1UserTxs)
 
 	// No l1UserTxs for this toForgeL1TxsNum
 	l1UserTxs, err = historyDB.GetUnforgedL1UserTxs(2)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	assert.Equal(t, 0, len(l1UserTxs))
 }
 
@@ -685,9 +685,9 @@ func TestSetInitialSCVars(t *testing.T) {
 	assert.Equal(t, sql.ErrNoRows, tracerr.Unwrap(err))
 	rollup, auction, wDelayer := exampleInitSCVars()
 	err = historyDB.SetInitialSCVars(rollup, auction, wDelayer)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	dbRollup, dbAuction, dbWDelayer, err := historyDB.GetSCVars()
-	assert.Nil(t, err)
+	require.NoError(t, err)
 	require.Equal(t, rollup, dbRollup)
 	require.Equal(t, auction, dbAuction)
 	require.Equal(t, wDelayer, dbWDelayer)
@@ -718,16 +718,16 @@ func TestSetL1UserTxEffectiveAmounts(t *testing.T) {
 		CoordUser:     "A",
 	}
 	blocks, err := tc.GenerateBlocks(set)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = tc.FillBlocksExtra(blocks, &tilCfgExtra)
-	assert.Nil(t, err)
+	require.NoError(t, err)
 	err = tc.FillBlocksForgedL1UserTxs(blocks)
-	require.Nil(t, err)
+	require.NoError(t, err)
 
 	// Add only first block so that the L1UserTxs are not marked as forged
 	for i := range blocks[:1] {
 		err = historyDB.AddBlockSCData(&blocks[i])
-		require.Nil(t, err)
+		require.NoError(t, err)
 	}
 	// Add second batch to trigger the update of the batch_num,
 	// while avoiding the implicit call of setL1UserTxEffectiveAmounts
@@ -735,7 +735,7 @@ func TestSetL1UserTxEffectiveAmounts(t *testing.T) {
 	assert.NoError(t, err)
 	err = historyDB.addBatch(historyDB.db, &blocks[1].Rollup.Batches[0].Batch)
 	assert.NoError(t, err)
-	require.Nil(t, err)
+	require.NoError(t, err)
 
 	// Set the Effective{Amount,DepositAmount} of the L1UserTxs that are forged in the second block
 	l1Txs := blocks[1].Rollup.Batches[0].L1UserTxs
@@ -805,14 +805,14 @@ func TestUpdateExitTree(t *testing.T) {
 		CoordUser:     "A",
 	}
 	blocks, err := tc.GenerateBlocks(set)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = tc.FillBlocksExtra(blocks, &tilCfgExtra)
-	assert.Nil(t, err)
+	require.NoError(t, err)
 
 	// Add all blocks except for the last two
 	for i := range blocks[:len(blocks)-2] {
 		err = historyDB.AddBlockSCData(&blocks[i])
-		require.Nil(t, err)
+		require.NoError(t, err)
 	}
 
 	// Add withdraws to the second-to-last block, and insert block into the DB
@@ -832,15 +832,15 @@ func TestUpdateExitTree(t *testing.T) {
 			Owner: tc.UsersByIdx[259].Addr, Token: tokenAddr},
 	)
 	err = historyDB.addBlock(historyDB.db, &block.Block)
-	require.Nil(t, err)
+	require.NoError(t, err)
 
 	err = historyDB.updateExitTree(historyDB.db, block.Block.Num,
 		block.Rollup.Withdrawals, block.WDelayer.Withdrawals)
-	require.Nil(t, err)
+	require.NoError(t, err)
 
 	// Check that exits in DB match with the expected values
 	dbExits, err := historyDB.GetAllExits()
-	require.Nil(t, err)
+	require.NoError(t, err)
 	assert.Equal(t, 4, len(dbExits))
 	dbExitsByIdx := make(map[common.Idx]common.ExitInfo)
 	for _, dbExit := range dbExits {
@@ -865,15 +865,15 @@ func TestUpdateExitTree(t *testing.T) {
 			Amount: big.NewInt(80),
 		})
 	err = historyDB.addBlock(historyDB.db, &block.Block)
-	require.Nil(t, err)
+	require.NoError(t, err)
 
 	err = historyDB.updateExitTree(historyDB.db, block.Block.Num,
 		block.Rollup.Withdrawals, block.WDelayer.Withdrawals)
-	require.Nil(t, err)
+	require.NoError(t, err)
 
 	// Check that delayed withdrawn has been set
 	dbExits, err = historyDB.GetAllExits()
-	require.Nil(t, err)
+	require.NoError(t, err)
 	for _, dbExit := range dbExits {
 		dbExitsByIdx[dbExit.AccountIdx] = dbExit
 	}
@@ -885,16 +885,16 @@ func TestGetBestBidCoordinator(t *testing.T) {
 
 	rollup, auction, wDelayer := exampleInitSCVars()
 	err := historyDB.SetInitialSCVars(rollup, auction, wDelayer)
-	require.Nil(t, err)
+	require.NoError(t, err)
 
 	tc := til.NewContext(common.RollupConstMaxL1UserTx)
 	blocks, err := tc.GenerateBlocks(`
 		Type: Blockchain
 		> block // blockNum=2
 	`)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = historyDB.AddBlockSCData(&blocks[0])
-	require.Nil(t, err)
+	require.NoError(t, err)
 
 	coords := []common.Coordinator{
 		{
@@ -911,7 +911,7 @@ func TestGetBestBidCoordinator(t *testing.T) {
 		},
 	}
 	err = historyDB.addCoordinators(historyDB.db, coords)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = historyDB.addBids(historyDB.db, []common.Bid{
 		{
 			SlotNum:     10,
@@ -926,10 +926,10 @@ func TestGetBestBidCoordinator(t *testing.T) {
 			Bidder:      coords[1].Bidder,
 		},
 	})
-	require.Nil(t, err)
+	require.NoError(t, err)
 
 	forger10, err := historyDB.GetBestBidCoordinator(10)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	require.Equal(t, coords[1].Forger, forger10.Forger)
 	require.Equal(t, coords[1].Bidder, forger10.Bidder)
 	require.Equal(t, coords[1].URL, forger10.URL)

synchronizer/synchronizer.go

@@ -753,13 +753,11 @@ func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, e
 		// L1CoordinatorTxs, PoolL2Txs) into stateDB so that they are
 		// processed.
 
-		// Add TxID, TxType, Position, BlockNum and BatchNum to L2 txs
+		// Set TxType to the forged L2Txs
 		for i := range forgeBatchArgs.L2TxsData {
-			nTx, err := common.NewL2Tx(&forgeBatchArgs.L2TxsData[i])
+			if err := forgeBatchArgs.L2TxsData[i].SetType(); err != nil {
-			if err != nil {
 				return nil, tracerr.Wrap(err)
 			}
-			forgeBatchArgs.L2TxsData[i] = *nTx
 		}
 
 		// Transform L2 txs to PoolL2Txs
@@ -780,19 +778,22 @@ func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, e
 		}
 
 		// Transform processed PoolL2 txs to L2 and store in BatchData
-		if poolL2Txs != nil {
 		l2Txs, err := common.PoolL2TxsToL2Txs(poolL2Txs) // NOTE: This is a big uggly, find a better way
 		if err != nil {
 			return nil, tracerr.Wrap(err)
 		}
+
+		// Set TxID, BlockNum, BatchNum and Position to the forged L2Txs
 		for i := range l2Txs {
-				l2Txs[i].Position = position
+			if err := l2Txs[i].SetID(); err != nil {
+				return nil, err
+			}
 			l2Txs[i].EthBlockNum = blockNum
 			l2Txs[i].BatchNum = batchNum
+			l2Txs[i].Position = position
 			position++
 		}
 		batchData.L2Txs = l2Txs
-		}
 
 		// Set the BatchNum in the forged L1UserTxs
 		for i := range l1UserTxs {

test/til/txs.go

@@ -882,6 +882,9 @@ func (tc *Context) FillBlocksExtra(blocks []common.BlockData, cfg *ConfigExtra)
 				position++
 				tc.extra.nonces[tx.FromIdx]++
 				tx.Nonce = tc.extra.nonces[tx.FromIdx]
+				if err := tx.SetID(); err != nil {
+					return err
+				}
 				nTx, err := common.NewL2Tx(tx)
 				if err != nil {
 					return tracerr.Wrap(err)