feat: support to disable txindexer;

eth/backend.go

@@ -344,7 +344,12 @@ func New(stack *node.Node, config *ethconfig.Config) (*Ethereum, error) {
 	shouldPreserve := func(header *types.Header) bool {
 		return false
 	}
-	eth.blockchain, err = core.NewBlockChain(chainDb, cacheConfig, config.Genesis, &overrides, eth.engine, vmConfig, shouldPreserve, &config.TransactionHistory, bcOps...)
+	txLookupLimit := &config.TransactionHistory
+	if config.DisableTxIndexer {
+		log.Warn("The TxIndexer is disabled. Please note that the next time you re-enable it, it may affect the node performance because of rebuilding the tx index.")
+		txLookupLimit = nil
+	}
+	eth.blockchain, err = core.NewBlockChain(chainDb, cacheConfig, config.Genesis, &overrides, eth.engine, vmConfig, shouldPreserve, txLookupLimit, bcOps...)
 	if err != nil {
 		return nil, err
 	}

eth/ethconfig/config.go

@@ -124,6 +124,8 @@ type Config struct {
 	PathSyncFlush      bool   `toml:",omitempty"` // State scheme used to store ethereum state and merkle trie nodes on top
 	JournalFileEnabled bool   // Whether the TrieJournal is stored using journal file
 
+	DisableTxIndexer bool `toml:",omitempty"` // Whether to enable the transaction indexer
+
 	// RequiredBlocks is a set of block number -> hash mappings which must be in the
 	// canonical chain of all remote peers. Setting the option makes geth verify the
 	// presence of these blocks for every new peer connection.