diff --git a/core/bin/external_node/src/config/mod.rs b/core/bin/external_node/src/config/mod.rs
index e37a71d79c6..88c48e39394 100644
--- a/core/bin/external_node/src/config/mod.rs
+++ b/core/bin/external_node/src/config/mod.rs
@@ -4,7 +4,7 @@ use anyhow::Context;
 use serde::Deserialize;
 use url::Url;
 use zksync_basic_types::{Address, L1ChainId, L2ChainId};
-use zksync_config::ObjectStoreConfig;
+use zksync_config::{configs::chain::L1BatchCommitDataGeneratorMode, ObjectStoreConfig};
 use zksync_consensus_roles::node;
 use zksync_core::{
     api_server::{
@@ -200,6 +200,9 @@ pub struct OptionalENConfig {
     /// 0 means that sealing is synchronous; this is mostly useful for performance comparison, testing etc.
     #[serde(default = "OptionalENConfig::default_miniblock_seal_queue_capacity")]
     pub miniblock_seal_queue_capacity: usize,
+
+    #[serde(default = "OptionalENConfig::default_l1_batch_commit_data_generator_mode")]
+    pub l1_batch_commit_data_generator_mode: L1BatchCommitDataGeneratorMode,
 }
 
 impl OptionalENConfig {
@@ -306,6 +309,10 @@ impl OptionalENConfig {
         10
     }
 
+    const fn default_l1_batch_commit_data_generator_mode() -> L1BatchCommitDataGeneratorMode {
+        L1BatchCommitDataGeneratorMode::Rollup
+    }
+
     pub fn polling_interval(&self) -> Duration {
         Duration::from_millis(self.polling_interval)
     }
diff --git a/core/bin/external_node/src/config/tests.rs b/core/bin/external_node/src/config/tests.rs
index 243be39a113..8eb9792b8ee 100644
--- a/core/bin/external_node/src/config/tests.rs
+++ b/core/bin/external_node/src/config/tests.rs
@@ -25,6 +25,10 @@ fn parsing_optional_config_from_empty_env() {
         128 * BYTES_IN_MEGABYTE
     );
     assert_eq!(config.max_response_body_size(), 10 * BYTES_IN_MEGABYTE);
+    assert_eq!(
+        config.l1_batch_commit_data_generator_mode,
+        L1BatchCommitDataGeneratorMode::Rollup
+    );
 }
 
 #[test]
@@ -44,6 +48,7 @@ fn parsing_optional_config_from_env() {
         ("EN_MERKLE_TREE_MULTI_GET_CHUNK_SIZE", "1000"),
         ("EN_MERKLE_TREE_BLOCK_CACHE_SIZE_MB", "32"),
         ("EN_MAX_RESPONSE_BODY_SIZE_MB", "1"),
+        ("EN_L1_BATCH_COMMIT_DATA_GENERATOR_MODE", "Validium"),
     ];
     let env_vars = env_vars
         .into_iter()
@@ -70,4 +75,8 @@ fn parsing_optional_config_from_env() {
         32 * BYTES_IN_MEGABYTE
     );
     assert_eq!(config.max_response_body_size(), BYTES_IN_MEGABYTE);
+    assert_eq!(
+        config.l1_batch_commit_data_generator_mode,
+        L1BatchCommitDataGeneratorMode::Validium
+    );
 }
diff --git a/core/bin/external_node/src/main.rs b/core/bin/external_node/src/main.rs
index a5b5a2473e2..85fa1c9a0ea 100644
--- a/core/bin/external_node/src/main.rs
+++ b/core/bin/external_node/src/main.rs
@@ -8,7 +8,7 @@ use prometheus_exporter::PrometheusExporterConfig;
 use tokio::{sync::watch, task, time::sleep};
 use zksync_basic_types::{Address, L2ChainId};
 use zksync_concurrency::{ctx, scope};
-use zksync_config::configs::database::MerkleTreeMode;
+use zksync_config::configs::{chain::L1BatchCommitDataGeneratorMode, database::MerkleTreeMode};
 use zksync_core::{
     api_server::{
         execution_sandbox::VmConcurrencyLimiter,
@@ -37,7 +37,10 @@ use zksync_dal::{healthcheck::ConnectionPoolHealthCheck, ConnectionPool};
 use zksync_health_check::{CheckHealth, HealthStatus, ReactiveHealthCheck};
 use zksync_state::PostgresStorageCaches;
 use zksync_storage::RocksDB;
-use zksync_types::l1_batch_commit_data_generator::RollupModeL1BatchCommitDataGenerator;
+use zksync_types::l1_batch_commit_data_generator::{
+    L1BatchCommitDataGenerator, RollupModeL1BatchCommitDataGenerator,
+    ValidiumModeL1BatchCommitDataGenerator,
+};
 use zksync_utils::wait_for_tasks::wait_for_tasks;
 
 use crate::{
@@ -240,8 +243,15 @@ async fn init_tasks(
         .context("failed initializing metadata calculator")?;
     healthchecks.push(Box::new(metadata_calculator.tree_health_check()));
 
-    let l1_batch_commit_data_generator = Arc::new(RollupModeL1BatchCommitDataGenerator {});
-
+    let l1_batch_commit_data_generator: Arc<dyn L1BatchCommitDataGenerator> = match config
+        .optional
+        .l1_batch_commit_data_generator_mode
+    {
+        L1BatchCommitDataGeneratorMode::Rollup => Arc::new(RollupModeL1BatchCommitDataGenerator {}),
+        L1BatchCommitDataGeneratorMode::Validium => {
+            Arc::new(ValidiumModeL1BatchCommitDataGenerator {})
+        }
+    };
     let consistency_checker = ConsistencyChecker::new(
         &config
             .required