fix parentHash when storing a new L2 block (#3171) (#3174)

0xPolygonHermez · Jan 31, 2024 · 188969b · 188969b
1 parent 3f537af
commit 188969b
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Showing 4 changed files with 89 additions and 2 deletions.
diff --git a/state/interfaces.go b/state/interfaces.go
@@ -60,6 +60,7 @@ type storage interface {
 	GetBatchNumberOfL2Block(ctx context.Context, blockNumber uint64, dbTx pgx.Tx) (uint64, error)
 	BatchNumberByL2BlockNumber(ctx context.Context, blockNumber uint64, dbTx pgx.Tx) (uint64, error)
 	GetL2BlockByNumber(ctx context.Context, blockNumber uint64, dbTx pgx.Tx) (*L2Block, error)
+	GetL2BlockHashByNumber(ctx context.Context, blockNumber uint64, dbTx pgx.Tx) (common.Hash, error)
 	GetL2BlocksByBatchNumber(ctx context.Context, batchNumber uint64, dbTx pgx.Tx) ([]L2Block, error)
 	GetLastL2BlockCreatedAt(ctx context.Context, dbTx pgx.Tx) (*time.Time, error)
 	GetTransactionByHash(ctx context.Context, transactionHash common.Hash, dbTx pgx.Tx) (*types.Transaction, error)

diff --git a/state/mocks/mock_storage.go b/state/mocks/mock_storage.go
diff --git a/state/pgstatestorage/l2block.go b/state/pgstatestorage/l2block.go
@@ -424,6 +424,27 @@ func (p *PostgresStorage) GetL2BlockHeaderByNumber(ctx context.Context, blockNum
 	return header, nil
 }
 
+// GetL2BlockHashByNumber gets the block hash by block number
+func (p *PostgresStorage) GetL2BlockHashByNumber(ctx context.Context, blockNumber uint64, dbTx pgx.Tx) (common.Hash, error) {
+	const getL2BlockHeaderByNumberSQL = "SELECT block_hash FROM state.l2block b WHERE b.block_num = $1"
+
+	blockHash := state.ZeroHash
+
+	var blockHashStr string
+	q := p.getExecQuerier(dbTx)
+	err := q.QueryRow(ctx, getL2BlockHeaderByNumberSQL, blockNumber).Scan(&blockHashStr)
+
+	if errors.Is(err, pgx.ErrNoRows) {
+		return blockHash, state.ErrNotFound
+	} else if err != nil {
+		return blockHash, err
+	}
+
+	blockHash = common.HexToHash(blockHashStr)
+
+	return blockHash, nil
+}
+
 // GetL2BlockHashesSince gets the block hashes added since the provided date
 func (p *PostgresStorage) GetL2BlockHashesSince(ctx context.Context, since time.Time, dbTx pgx.Tx) ([]common.Hash, error) {
 	const getL2BlockHashesSinceSQL = "SELECT block_hash FROM state.l2block WHERE created_at >= $1"

diff --git a/state/transaction.go b/state/transaction.go
@@ -203,11 +203,16 @@ func (s *State) StoreL2Block(ctx context.Context, batchNumber uint64, l2Block *P
 	log.Debugf("storing l2 block %d, txs %d, hash %s", l2Block.BlockNumber, len(l2Block.TransactionResponses), l2Block.BlockHash.String())
 	start := time.Now()
 
+	prevL2BlockHash, err := s.GetL2BlockHashByNumber(ctx, l2Block.BlockNumber-1, dbTx)
+	if err != nil {
+		return err
+	}
+
 	header := &types.Header{
 		Number:     new(big.Int).SetUint64(l2Block.BlockNumber),
-		ParentHash: l2Block.ParentHash,
+		ParentHash: prevL2BlockHash,
 		Coinbase:   l2Block.Coinbase,
-		Root:       l2Block.BlockHash, //BlockHash is the StateRoot in Etrog
+		Root:       l2Block.BlockHash, //BlockHash returned by the executor is the StateRoot in Etrog
 		GasUsed:    l2Block.GasUsed,
 		GasLimit:   s.cfg.MaxCumulativeGasUsed,
 		Time:       l2Block.Timestamp,