fix nil error in bor devnet (#8578)

eth/backend.go

@@ -286,22 +286,6 @@ func New(ctx context.Context, stack *node.Node, config *ethconfig.Config, logger
 		logger: logger,
 	}
 
-	// Check if we have an already initialized chain and fall back to
-	// that if so. Otherwise we need to generate a new genesis spec.
-	blockReader, blockWriter, allSnapshots, agg, err := setUpBlockReader(ctx, chainKv, config.Dirs, config.Snapshot, config.HistoryV3, config.Genesis.Config.Bor != nil, logger)
-	if err != nil {
-		return nil, err
-	}
-	backend.agg, backend.blockSnapshots, backend.blockReader, backend.blockWriter = agg, allSnapshots, blockReader, blockWriter
-
-	if config.HistoryV3 {
-		backend.chainDB, err = temporal.New(backend.chainDB, agg, systemcontracts.SystemContractCodeLookup[config.Genesis.Config.ChainName])
-		if err != nil {
-			return nil, err
-		}
-		chainKv = backend.chainDB //nolint
-	}
-
 	var chainConfig *chain.Config
 	var genesis *types.Block
 	if err := backend.chainDB.Update(context.Background(), func(tx kv.RwTx) error {
@@ -329,6 +313,22 @@ func New(ctx context.Context, stack *node.Node, config *ethconfig.Config, logger
 
 	logger.Info("Initialised chain configuration", "config", chainConfig, "genesis", genesis.Hash())
 
+	// Check if we have an already initialized chain and fall back to
+	// that if so. Otherwise we need to generate a new genesis spec.
+	blockReader, blockWriter, allSnapshots, agg, err := setUpBlockReader(ctx, chainKv, config.Dirs, config.Snapshot, config.HistoryV3, chainConfig.Bor != nil, logger)
+	if err != nil {
+		return nil, err
+	}
+	backend.agg, backend.blockSnapshots, backend.blockReader, backend.blockWriter = agg, allSnapshots, blockReader, blockWriter
+
+	if config.HistoryV3 {
+		backend.chainDB, err = temporal.New(backend.chainDB, agg, systemcontracts.SystemContractCodeLookup[config.Genesis.Config.ChainName])
+		if err != nil {
+			return nil, err
+		}
+		chainKv = backend.chainDB //nolint
+	}
+
 	if err := backend.setUpSnapDownloader(ctx, config.Downloader); err != nil {
 		return nil, err
 	}