feat(op, txpool): add additional update routine for conditionals (#14497)

Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de>

crates/optimism/node/src/node.rs

@@ -107,7 +107,10 @@ impl OpNode {
             self.args;
         ComponentsBuilder::default()
             .node_types::<Node>()
-            .pool(OpPoolBuilder::default())
+            .pool(
+                OpPoolBuilder::default()
+                    .with_enable_tx_conditional(self.args.enable_tx_conditional),
+            )
             .payload(
                 OpPayloadBuilder::new(compute_pending_block).with_da_config(self.da_config.clone()),
             )
@@ -433,20 +436,33 @@ where
 pub struct OpPoolBuilder<T = crate::txpool::OpPooledTransaction> {
     /// Enforced overrides that are applied to the pool config.
     pub pool_config_overrides: PoolBuilderConfigOverrides,
+    /// Enable transaction conditionals.
+    pub enable_tx_conditional: bool,
     /// Marker for the pooled transaction type.
     _pd: core::marker::PhantomData<T>,
 }
 
 impl<T> Default for OpPoolBuilder<T> {
     fn default() -> Self {
-        Self { pool_config_overrides: Default::default(), _pd: Default::default() }
+        Self {
+            pool_config_overrides: Default::default(),
+            enable_tx_conditional: false,
+            _pd: Default::default(),
+        }
+    }
+}
+
+impl<T> OpPoolBuilder<T> {
+    fn with_enable_tx_conditional(mut self, enable_tx_conditional: bool) -> Self {
+        self.enable_tx_conditional = enable_tx_conditional;
+        self
     }
 }
 
 impl<Node, T> PoolBuilder<Node> for OpPoolBuilder<T>
 where
     Node: FullNodeTypes<Types: NodeTypes<ChainSpec: OpHardforks>>,
-    T: EthPoolTransaction<Consensus = TxTy<Node::Types>>,
+    T: EthPoolTransaction<Consensus = TxTy<Node::Types>> + MaybeConditionalTransaction,
 {
     type Pool = OpTransactionPool<Node::Provider, DiskFileBlobStore, T>;
 
@@ -481,7 +497,7 @@ where
         info!(target: "reth::cli", "Transaction pool initialized");
         let transactions_path = data_dir.txpool_transactions();
 
-        // spawn txpool maintenance task
+        // spawn txpool maintenance tasks
         {
             let pool = transaction_pool.clone();
             let chain_events = ctx.provider().canonical_state_stream();
@@ -500,18 +516,31 @@ where
                 },
             );
 
-            // spawn the maintenance task
+            // spawn the main maintenance task
             ctx.task_executor().spawn_critical(
                 "txpool maintenance task",
                 reth_transaction_pool::maintain::maintain_transaction_pool_future(
                     client,
-                    pool,
+                    pool.clone(),
                     chain_events,
                     ctx.task_executor().clone(),
                     Default::default(),
                 ),
             );
             debug!(target: "reth::cli", "Spawned txpool maintenance task");
+
+            if self.enable_tx_conditional {
+                // spawn the Op txpool maintenance task
+                let chain_events = ctx.provider().canonical_state_stream();
+                ctx.task_executor().spawn_critical(
+                    "Op txpool maintenance task",
+                    reth_optimism_txpool::maintain::maintain_transaction_pool_future(
+                        pool,
+                        chain_events,
+                    ),
+                );
+                debug!(target: "reth::cli", "Spawned Op txpool maintenance task");
+            }
         }
 
         Ok(transaction_pool)

crates/optimism/txpool/Cargo.toml

@@ -21,6 +21,7 @@ alloy-rpc-types-eth.workspace = true
 # reth
 reth-chainspec.workspace = true
 reth-primitives-traits.workspace = true
+reth-chain-state.workspace = true
 reth-storage-api.workspace = true
 reth-transaction-pool.workspace = true
 
@@ -37,6 +38,7 @@ reth-optimism-primitives = { workspace = true, features = ["reth-codec"] }
 # misc
 c-kzg.workspace = true
 derive_more.workspace = true
+futures-util.workspace = true
 parking_lot.workspace = true
 
 [dev-dependencies]

crates/optimism/txpool/src/conditional.rs

@@ -7,6 +7,9 @@ pub trait MaybeConditionalTransaction {
     /// Attach a [`TransactionConditional`].
     fn set_conditional(&mut self, conditional: TransactionConditional);
 
+    /// Get attached [`TransactionConditional`] if any.
+    fn conditional(&self) -> Option<&TransactionConditional>;
+
     /// Helper that sets the conditional and returns the instance again
     fn with_conditional(mut self, conditional: TransactionConditional) -> Self
     where

crates/optimism/txpool/src/lib.rs

@@ -16,6 +16,7 @@ pub use validator::{OpL1BlockInfo, OpTransactionValidator};
 pub mod conditional;
 mod transaction;
 pub use transaction::OpPooledTransaction;
+pub mod maintain;
 
 use reth_transaction_pool::{CoinbaseTipOrdering, Pool, TransactionValidationTaskExecutor};
 

crates/optimism/txpool/src/maintain.rs

@@ -0,0 +1,59 @@
+//! Support for maintaining the state of the transaction pool
+
+use alloy_consensus::{conditional::BlockConditionalAttributes, BlockHeader};
+use futures_util::{future::BoxFuture, FutureExt, Stream, StreamExt};
+use reth_chain_state::CanonStateNotification;
+use reth_primitives_traits::NodePrimitives;
+use reth_transaction_pool::TransactionPool;
+
+use crate::conditional::MaybeConditionalTransaction;
+
+/// Returns a spawnable future for maintaining the state of the transaction pool.
+pub fn maintain_transaction_pool_future<N, Pool, St>(
+    pool: Pool,
+    events: St,
+) -> BoxFuture<'static, ()>
+where
+    N: NodePrimitives,
+    Pool: TransactionPool + 'static,
+    Pool::Transaction: MaybeConditionalTransaction,
+    St: Stream<Item = CanonStateNotification<N>> + Send + Unpin + 'static,
+{
+    async move {
+        maintain_transaction_pool(pool, events).await;
+    }
+    .boxed()
+}
+
+/// Maintains the state of the transaction pool by handling new blocks and reorgs.
+///
+/// This listens for any new blocks and reorgs and updates the transaction pool's state accordingly
+pub async fn maintain_transaction_pool<N, Pool, St>(pool: Pool, mut events: St)
+where
+    N: NodePrimitives,
+    Pool: TransactionPool,
+    Pool::Transaction: MaybeConditionalTransaction,
+    St: Stream<Item = CanonStateNotification<N>> + Send + Unpin + 'static,
+{
+    loop {
+        let Some(event) = events.next().await else { break };
+        if let CanonStateNotification::Commit { new } = event {
+            if new.is_empty() {
+                continue;
+            }
+            let block_attr = BlockConditionalAttributes {
+                number: new.tip().number(),
+                timestamp: new.tip().timestamp(),
+            };
+            let mut to_remove = Vec::new();
+            for tx in &pool.pooled_transactions() {
+                if let Some(conditional) = tx.transaction.conditional() {
+                    if conditional.has_exceeded_block_attributes(&block_attr) {
+                        to_remove.push(*tx.hash());
+                    }
+                }
+            }
+            let _ = pool.remove_transactions(to_remove);
+        }
+    }
+}

crates/optimism/txpool/src/transaction.rs

@@ -60,17 +60,16 @@ impl<Cons: SignedTransaction, Pooled> OpPooledTransaction<Cons, Pooled> {
         self.conditional = Some(Box::new(conditional));
         self
     }
-
-    /// Conditional getter.
-    pub fn conditional(&self) -> Option<&TransactionConditional> {
-        self.conditional.as_deref()
-    }
 }
 
 impl<Cons, Pooled> MaybeConditionalTransaction for OpPooledTransaction<Cons, Pooled> {
     fn set_conditional(&mut self, conditional: TransactionConditional) {
         self.conditional = Some(Box::new(conditional))
     }
+
+    fn conditional(&self) -> Option<&TransactionConditional> {
+        self.conditional.as_deref()
+    }
 }
 
 impl<Cons, Pooled> PoolTransaction for OpPooledTransaction<Cons, Pooled>