feat: add override for additional_validation_tasks (paradigmxyz#11655)

Author: mattsse

crates/node/builder/src/components/pool.rs

@@ -52,6 +52,8 @@ pub struct PoolBuilderConfigOverrides {
     pub minimal_protocol_basefee: Option<u64>,
     /// Addresses that will be considered as local. Above exemptions apply.
     pub local_addresses: HashSet<Address>,
+    /// Additional tasks to validate new transactions.
+    pub additional_validation_tasks: Option<usize>,
 }
 
 impl PoolBuilderConfigOverrides {
@@ -65,6 +67,7 @@ impl PoolBuilderConfigOverrides {
             max_account_slots,
             minimal_protocol_basefee,
             local_addresses,
+            additional_validation_tasks: _,
         } = self;
 
         if let Some(pending_limit) = pending_limit {

crates/optimism/node/src/node.rs

@@ -189,7 +189,11 @@ where
         ))
         .with_head_timestamp(ctx.head().timestamp)
         .kzg_settings(ctx.kzg_settings()?)
-        .with_additional_tasks(ctx.config().txpool.additional_validation_tasks)
+        .with_additional_tasks(
+            pool_config_overrides
+                .additional_validation_tasks
+                .unwrap_or_else(|| ctx.config().txpool.additional_validation_tasks),
+        )
         .build_with_tasks(ctx.provider().clone(), ctx.task_executor().clone(), blob_store.clone())
         .map(|validator| {
             OpTransactionValidator::new(validator)