apollo_batcher: make versioned constants override optional

crates/apollo_batcher/src/block_builder.rs

@@ -712,9 +712,9 @@ impl BlockBuilderFactory {
         );
         let height = block_metadata.block_info.block_number;
         let block_builder_config = self.block_builder_config.clone();
-        let versioned_constants = VersionedConstants::get_versioned_constants(
+        let versioned_constants = VersionedConstants::get_versioned_constants(Some(
             block_builder_config.versioned_constants_overrides,
-        );
+        ));
         let block_context = BlockContext::new(
             block_metadata.block_info,
             block_builder_config.chain_info,

crates/apollo_gateway/src/stateful_transaction_validator.rs

@@ -87,9 +87,9 @@ impl StatefulTransactionValidatorFactoryTrait for StatefulTransactionValidatorFa
         };
 
         let state = CachedState::new(state_reader_and_contract_manager);
-        let mut versioned_constants = VersionedConstants::get_versioned_constants(
+        let mut versioned_constants = VersionedConstants::get_versioned_constants(Some(
             self.config.versioned_constants_overrides.clone(),
-        );
+        ));
         // The validation of a transaction is not affected by the casm hash migration.
         versioned_constants.enable_casm_hash_migration = false;
 

crates/blockifier/src/blockifier_versioned_constants.rs

@@ -437,23 +437,29 @@ impl VersionedConstants {
     // squashing the functions together.
     /// Returns the latest versioned constants, applying the given overrides.
     pub fn get_versioned_constants(
-        versioned_constants_overrides: VersionedConstantsOverrides,
+        versioned_constants_overrides: Option<VersionedConstantsOverrides>,
     ) -> Self {
-        let VersionedConstantsOverrides {
-            validate_max_n_steps,
-            max_recursion_depth,
-            invoke_tx_max_n_steps,
-            max_n_events,
-        } = versioned_constants_overrides;
         let latest_constants = Self::latest_constants().clone();
-        let tx_event_limits =
-            EventLimits { max_n_emitted_events: max_n_events, ..latest_constants.tx_event_limits };
-        Self {
-            validate_max_n_steps,
-            max_recursion_depth,
-            invoke_tx_max_n_steps,
-            tx_event_limits,
-            ..latest_constants
+        match versioned_constants_overrides {
+            None => latest_constants,
+            Some(VersionedConstantsOverrides {
+                validate_max_n_steps,
+                max_recursion_depth,
+                invoke_tx_max_n_steps,
+                max_n_events,
+            }) => {
+                let tx_event_limits = EventLimits {
+                    max_n_emitted_events: max_n_events,
+                    ..latest_constants.tx_event_limits
+                };
+                Self {
+                    validate_max_n_steps,
+                    max_recursion_depth,
+                    invoke_tx_max_n_steps,
+                    tx_event_limits,
+                    ..latest_constants
+                }
+            }
         }
     }
 

crates/blockifier/src/versioned_constants_test.rs

@@ -29,12 +29,12 @@ fn test_versioned_constants_overrides() {
     let updated_max_n_events = versioned_constants.tx_event_limits.max_n_emitted_events + 1;
 
     // Create a versioned constants copy with overriden values.
-    let result = VersionedConstants::get_versioned_constants(VersionedConstantsOverrides {
+    let result = VersionedConstants::get_versioned_constants(Some(VersionedConstantsOverrides {
         validate_max_n_steps: updated_validate_max_n_steps,
         max_recursion_depth: updated_max_recursion_depth,
         invoke_tx_max_n_steps: updated_invoke_tx_max_n_steps,
         max_n_events: updated_max_n_events,
-    });
+    }));
 
     // Assert the new values are used.
     assert_eq!(result.invoke_tx_max_n_steps, updated_invoke_tx_max_n_steps);

crates/native_blockifier/src/py_block_executor.rs

@@ -120,8 +120,9 @@ impl PyBlockExecutor {
         log::debug!("Initializing Block Executor...");
         let storage =
             PapyrusStorage::new(target_storage_config).expect("Failed to initialize storage.");
-        let versioned_constants =
-            VersionedConstants::get_versioned_constants(py_versioned_constants_overrides.into());
+        let versioned_constants = VersionedConstants::get_versioned_constants(Some(
+            py_versioned_constants_overrides.into(),
+        ));
         log::debug!("Initialized Block Executor.");
 
         Self {

crates/native_blockifier/src/py_validator.rs

@@ -43,8 +43,9 @@ impl PyValidator {
         let state = CachedState::new(state_reader);
 
         // Create the block context.
-        let mut versioned_constants =
-            VersionedConstants::get_versioned_constants(py_versioned_constants_overrides.into());
+        let mut versioned_constants = VersionedConstants::get_versioned_constants(Some(
+            py_versioned_constants_overrides.into(),
+        ));
         // The validation of a transaction is not affected by the casm hash migration.
         versioned_constants.enable_casm_hash_migration = false;
         let block_context = BlockContext::new(