Make transaction manager param configurable from cli (#6594)

Co-authored-by: Emilia Hane <elsaemiliaevahane@gmail.com>
Co-authored-by: Bjerg <onbjerg@users.noreply.github.com>
Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de>

Cargo.lock

@@ -6434,6 +6434,7 @@ dependencies = [
  "reth-db",
  "reth-discv4",
  "reth-downloaders",
+ "reth-eth-wire",
  "reth-interfaces",
  "reth-metrics",
  "reth-net-nat",

book/cli/reth/node.md

@@ -129,6 +129,18 @@ Networking:
       --max-inbound-peers <MAX_INBOUND_PEERS>
           Maximum number of inbound requests. default: 30
 
+      --pooled-tx-response-soft-limit <BYTES>
+          Soft limit for the byte size of a [`PooledTransactions`](reth_eth_wire::PooledTransactions) response on assembling a [`GetPooledTransactions`](reth_eth_wire::GetPooledTransactions) request. Spec'd at 2 MiB.
+
+          <https://github.com/ethereum/devp2p/blob/master/caps/eth.md#protocol-messages>.
+
+          [default: 2097152]
+
+      --pooled-tx-pack-soft-limit <BYTES>
+          Default soft limit for the byte size of a [`PooledTransactions`](reth_eth_wire::PooledTransactions) response on assembling a [`GetPooledTransactions`](reth_eth_wire::PooledTransactions) request. This defaults to less than the [`SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE`], at 2 MiB, used when assembling a [`PooledTransactions`](reth_eth_wire::PooledTransactions) response. Default is 128 KiB
+
+          [default: 131072]
+
 RPC:
       --http
           Enable the HTTP-RPC server
@@ -331,6 +343,11 @@ TxPool:
           
           [default: 100]
 
+      --txpool.max_tx_input_bytes <MAX_TX_INPUT_BYTES>
+        Maximum size a single transaction can have
+
+          [default: 131072]
+
       --txpool.nolocals
           Flag to disable local transaction exemptions
 

crates/net/network/src/builder.rs

@@ -1,8 +1,9 @@
 //! Builder support for configuring the entire setup.
 
 use crate::{
-    eth_requests::EthRequestHandler, transactions::TransactionsManager, NetworkHandle,
-    NetworkManager,
+    eth_requests::EthRequestHandler,
+    transactions::{TransactionsManager, TransactionsManagerConfig},
+    NetworkHandle, NetworkManager,
 };
 use reth_transaction_pool::TransactionPool;
 use tokio::sync::mpsc;
@@ -54,12 +55,13 @@ impl<C, Tx, Eth> NetworkBuilder<C, Tx, Eth> {
     pub fn transactions<Pool: TransactionPool>(
         self,
         pool: Pool,
+        transactions_manager_config: TransactionsManagerConfig,
     ) -> NetworkBuilder<C, TransactionsManager<Pool>, Eth> {
         let NetworkBuilder { mut network, request_handler, .. } = self;
         let (tx, rx) = mpsc::unbounded_channel();
         network.set_transactions(tx);
         let handle = network.handle().clone();
-        let transactions = TransactionsManager::new(handle, pool, rx);
+        let transactions = TransactionsManager::new(handle, pool, rx, transactions_manager_config);
         NetworkBuilder { network, request_handler, transactions }
     }
 

crates/net/network/src/config.rs

@@ -5,6 +5,7 @@ use crate::{
     import::{BlockImport, ProofOfStakeBlockImport},
     peers::PeersConfig,
     session::SessionsConfig,
+    transactions::TransactionsManagerConfig,
     NetworkHandle, NetworkManager,
 };
 use reth_discv4::{Discv4Config, Discv4ConfigBuilder, DEFAULT_DISCOVERY_ADDRESS};
@@ -74,6 +75,8 @@ pub struct NetworkConfig<C> {
     pub extra_protocols: RlpxSubProtocols,
     /// Whether to disable transaction gossip
     pub tx_gossip_disabled: bool,
+    /// How to instantiate transactions manager.
+    pub transactions_manager_config: TransactionsManagerConfig,
     /// Optimism Network Config
     #[cfg(feature = "optimism")]
     pub optimism_network_config: OptimismNetworkConfig,
@@ -171,6 +174,8 @@ pub struct NetworkConfigBuilder {
     /// The block importer type
     #[serde(skip)]
     block_import: Option<Box<dyn BlockImport>>,
+    /// How to instantiate transactions manager.
+    transactions_manager_config: TransactionsManagerConfig,
     /// Optimism Network Config Builder
     #[cfg(feature = "optimism")]
     optimism_network_config: OptimismNetworkConfigBuilder,
@@ -209,6 +214,7 @@ impl NetworkConfigBuilder {
             block_import: None,
             #[cfg(feature = "optimism")]
             optimism_network_config: OptimismNetworkConfigBuilder::default(),
+            transactions_manager_config: Default::default(),
         }
     }
 
@@ -274,6 +280,11 @@ impl NetworkConfigBuilder {
         self
     }
 
+    pub fn transactions_manager_config(mut self, config: TransactionsManagerConfig) -> Self {
+        self.transactions_manager_config = config;
+        self
+    }
+
     /// Sets the discovery and listener address
     ///
     /// This is a convenience function for both [NetworkConfigBuilder::listener_addr] and
@@ -447,6 +458,7 @@ impl NetworkConfigBuilder {
             block_import,
             #[cfg(feature = "optimism")]
                 optimism_network_config: OptimismNetworkConfigBuilder { sequencer_endpoint },
+            transactions_manager_config,
         } = self;
 
         let listener_addr = listener_addr.unwrap_or(DEFAULT_DISCOVERY_ADDRESS);
@@ -501,6 +513,7 @@ impl NetworkConfigBuilder {
             tx_gossip_disabled,
             #[cfg(feature = "optimism")]
             optimism_network_config: OptimismNetworkConfig { sequencer_endpoint },
+            transactions_manager_config,
         }
     }
 }

crates/net/network/src/lib.rs

@@ -84,12 +84,13 @@
 //!
 //!     let config =
 //!         NetworkConfig::builder(local_key).boot_nodes(mainnet_nodes()).build(client.clone());
+//!     let transactions_manager_config = config.transactions_manager_config.clone();
 //!
 //!     // create the network instance
 //!     let (handle, network, transactions, request_handler) = NetworkManager::builder(config)
 //!         .await
 //!         .unwrap()
-//!         .transactions(pool)
+//!         .transactions(pool, transactions_manager_config)
 //!         .request_handler(client)
 //!         .split_with_handle();
 //! }

crates/net/network/src/manager.rs

@@ -179,6 +179,7 @@ where
             tx_gossip_disabled,
             #[cfg(feature = "optimism")]
                 optimism_network_config: crate::config::OptimismNetworkConfig { sequencer_endpoint },
+            ..
         } = config;
 
         let peers_manager = PeersManager::new(peers_config);
@@ -274,12 +275,13 @@ where
     ///
     ///     let config =
     ///         NetworkConfig::builder(local_key).boot_nodes(mainnet_nodes()).build(client.clone());
+    ///     let transactions_manager_config = config.transactions_manager_config.clone();
     ///
     ///     // create the network instance
     ///     let (handle, network, transactions, request_handler) = NetworkManager::builder(config)
     ///         .await
     ///         .unwrap()
-    ///         .transactions(pool)
+    ///         .transactions(pool, transactions_manager_config)
     ///         .request_handler(client)
     ///         .split_with_handle();
     /// }

crates/net/network/src/test_utils/testnet.rs

@@ -6,7 +6,7 @@ use crate::{
     eth_requests::EthRequestHandler,
     peers::PeersHandle,
     protocol::IntoRlpxSubProtocol,
-    transactions::{TransactionsHandle, TransactionsManager},
+    transactions::{TransactionsHandle, TransactionsManager, TransactionsManagerConfig},
     NetworkConfig, NetworkConfigBuilder, NetworkEvent, NetworkEvents, NetworkHandle,
     NetworkManager,
 };
@@ -394,7 +394,12 @@ where
     pub fn install_transactions_manager(&mut self, pool: Pool) {
         let (tx, rx) = unbounded_channel();
         self.network.set_transactions(tx);
-        let transactions_manager = TransactionsManager::new(self.handle(), pool.clone(), rx);
+        let transactions_manager = TransactionsManager::new(
+            self.handle(),
+            pool.clone(),
+            rx,
+            TransactionsManagerConfig::default(),
+        );
         self.transactions_manager = Some(transactions_manager);
         self.pool = Some(pool);
     }
@@ -407,8 +412,12 @@ where
         let Self { mut network, request_handler, client, secret_key, .. } = self;
         let (tx, rx) = unbounded_channel();
         network.set_transactions(tx);
-        let transactions_manager =
-            TransactionsManager::new(network.handle().clone(), pool.clone(), rx);
+        let transactions_manager = TransactionsManager::new(
+            network.handle().clone(),
+            pool.clone(),
+            rx,
+            TransactionsManagerConfig::default(),
+        );
         Peer {
             network,
             request_handler,

crates/net/network/src/transactions/config.rs

@@ -0,0 +1,35 @@
+use super::{
+    DEFAULT_SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE_ON_PACK_GET_POOLED_TRANSACTIONS_REQUEST,
+    SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE,
+};
+use derive_more::Constructor;
+
+/// Configuration for managing transactions within the network.
+#[derive(Debug, Default, Clone)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+pub struct TransactionsManagerConfig {
+    /// Configuration for fetching transactions.
+    pub transaction_fetcher_config: TransactionFetcherConfig,
+}
+
+/// Configuration for fetching transactions.
+#[derive(Debug, Constructor, Clone)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+pub struct TransactionFetcherConfig {
+    /// Soft limit for the byte size of a
+    /// [`PooledTransactions`](reth_eth_wire::PooledTransactions) response on assembling a
+    /// [`GetPooledTransactions`](reth_eth_wire::GetPooledTransactions) request. Spec'd at 2
+    /// MiB.
+    pub soft_limit_byte_size_pooled_transactions_response: usize,
+    /// Soft limit for the byte size of the expected
+    /// [`PooledTransactions`](reth_eth_wire::PooledTransactions) response on packing a
+    /// [`GetPooledTransactions`](reth_eth_wire::GetPooledTransactions) request with hashes.
+    pub soft_limit_byte_size_pooled_transactions_response_on_pack_request: usize,
+}
+
+impl Default for TransactionFetcherConfig {
+    fn default() -> Self {
+        Self { soft_limit_byte_size_pooled_transactions_response: SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE, soft_limit_byte_size_pooled_transactions_response_on_pack_request: DEFAULT_SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE_ON_PACK_GET_POOLED_TRANSACTIONS_REQUEST
+        }
+    }
+}

crates/net/network/src/transactions/fetcher.rs

@@ -21,8 +21,10 @@ use tokio::sync::{mpsc::error::TrySendError, oneshot, oneshot::error::RecvError}
 use tracing::{debug, trace};
 
 use super::{
+    config::TransactionFetcherConfig,
     constants::{tx_fetcher::*, SOFT_LIMIT_COUNT_HASHES_IN_GET_POOLED_TRANSACTIONS_REQUEST},
     AnnouncementFilter, Peer, PooledTransactions,
+    SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE,
 };
 
 /// The type responsible for fetching missing transactions from peers.
@@ -57,6 +59,15 @@ pub(crate) struct TransactionFetcher {
 // === impl TransactionFetcher ===
 
 impl TransactionFetcher {
+    /// Sets up transaction fetcher with config
+    pub fn with_transaction_fetcher_config(mut self, config: &TransactionFetcherConfig) -> Self {
+        self.info.soft_limit_byte_size_pooled_transactions_response =
+            config.soft_limit_byte_size_pooled_transactions_response;
+        self.info.soft_limit_byte_size_pooled_transactions_response_on_pack_request =
+            config.soft_limit_byte_size_pooled_transactions_response_on_pack_request;
+        self
+    }
+
     /// Removes the specified hashes from inflight tracking.
     #[inline]
     pub fn remove_hashes_from_transaction_fetcher<I>(&mut self, hashes: I)
@@ -191,8 +202,8 @@ impl TransactionFetcher {
             hashes_to_request.push(hash);
 
             // tx is really big, pack request with single tx
-            if size >= DEFAULT_SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE_ON_PACK_GET_POOLED_TRANSACTIONS_REQUEST {
-                return hashes_from_announcement_iter.collect::<RequestTxHashes>()
+            if size >= self.info.soft_limit_byte_size_pooled_transactions_response_on_pack_request {
+                return hashes_from_announcement_iter.collect::<RequestTxHashes>();
             } else {
                 acc_size_response = size;
             }
@@ -211,7 +222,9 @@ impl TransactionFetcher {
 
             let next_acc_size = acc_size_response + size;
 
-            if next_acc_size <= DEFAULT_SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE_ON_PACK_GET_POOLED_TRANSACTIONS_REQUEST {
+            if next_acc_size <=
+                self.info.soft_limit_byte_size_pooled_transactions_response_on_pack_request
+            {
                 // only update accumulated size of tx response if tx will fit in without exceeding
                 // soft limit
                 acc_size_response = next_acc_size;
@@ -221,7 +234,8 @@ impl TransactionFetcher {
             }
 
             let free_space =
-                DEFAULT_SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE_ON_PACK_GET_POOLED_TRANSACTIONS_REQUEST - acc_size_response;
+                self.info.soft_limit_byte_size_pooled_transactions_response_on_pack_request -
+                    acc_size_response;
 
             if free_space < MEDIAN_BYTE_SIZE_SMALL_LEGACY_TX_ENCODED {
                 break
@@ -966,17 +980,37 @@ impl Future for GetPooledTxRequestFut {
 pub struct TransactionFetcherInfo {
     /// Currently active outgoing [`GetPooledTransactions`] requests.
     pub(super) max_inflight_requests: usize,
+    /// Soft limit for the byte size of the expected
+    /// [`PooledTransactions`] response on packing a
+    /// [`GetPooledTransactions`] request with hashes.
+    soft_limit_byte_size_pooled_transactions_response_on_pack_request: usize,
+    /// Soft limit for the byte size of a [`PooledTransactions`]
+    /// response on assembling a [`GetPooledTransactions`]
+    /// request. Spec'd at 2 MiB.
+    pub(super) soft_limit_byte_size_pooled_transactions_response: usize,
 }
 
 impl TransactionFetcherInfo {
-    pub fn new(max_inflight_transaction_requests: usize) -> Self {
-        Self { max_inflight_requests: max_inflight_transaction_requests }
+    pub fn new(
+        max_inflight_transaction_requests: usize,
+        soft_limit_byte_size_pooled_transactions_response_on_pack_request: usize,
+        soft_limit_byte_size_pooled_transactions_response: usize,
+    ) -> Self {
+        Self {
+            max_inflight_requests: max_inflight_transaction_requests,
+            soft_limit_byte_size_pooled_transactions_response_on_pack_request,
+            soft_limit_byte_size_pooled_transactions_response,
+        }
     }
 }
 
 impl Default for TransactionFetcherInfo {
     fn default() -> Self {
-        Self::new(DEFAULT_MAX_COUNT_INFLIGHT_REQUESTS_ON_FETCH_PENDING_HASHES)
+        Self::new(
+            DEFAULT_MAX_COUNT_INFLIGHT_REQUESTS_ON_FETCH_PENDING_HASHES,
+            DEFAULT_SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE_ON_PACK_GET_POOLED_TRANSACTIONS_REQUEST,
+            SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE
+        )
     }
 }
 

crates/net/network/src/transactions/mod.rs

@@ -69,18 +69,21 @@ use tokio::sync::{mpsc, oneshot, oneshot::error::RecvError};
 use tokio_stream::wrappers::{ReceiverStream, UnboundedReceiverStream};
 use tracing::{debug, trace};
 
+mod config;
 mod constants;
 mod fetcher;
 mod validation;
+pub use config::{TransactionFetcherConfig, TransactionsManagerConfig};
 
 use constants::SOFT_LIMIT_COUNT_HASHES_IN_NEW_POOLED_TRANSACTIONS_BROADCAST_MESSAGE;
 pub(crate) use fetcher::{FetchEvent, TransactionFetcher};
 pub use validation::*;
 
-use self::constants::{
-    tx_manager::*, DEFAULT_SOFT_LIMIT_BYTE_SIZE_TRANSACTIONS_BROADCAST_MESSAGE,
+pub use self::constants::{
+    tx_fetcher::DEFAULT_SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE_ON_PACK_GET_POOLED_TRANSACTIONS_REQUEST,
     SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE,
 };
+use self::constants::{tx_manager::*, DEFAULT_SOFT_LIMIT_BYTE_SIZE_TRANSACTIONS_BROADCAST_MESSAGE};
 
 /// The future for inserting a function into the pool
 pub type PoolImportFuture = Pin<Box<dyn Future<Output = Vec<PoolResult<TxHash>>> + Send + 'static>>;
@@ -237,11 +240,14 @@ impl<Pool: TransactionPool> TransactionsManager<Pool> {
         network: NetworkHandle,
         pool: Pool,
         from_network: mpsc::UnboundedReceiver<NetworkTransactionEvent>,
+        transactions_manager_config: TransactionsManagerConfig,
     ) -> Self {
         let network_events = network.event_listener();
         let (command_tx, command_rx) = mpsc::unbounded_channel();
 
-        let transaction_fetcher = TransactionFetcher::default();
+        let transaction_fetcher = TransactionFetcher::default().with_transaction_fetcher_config(
+            &transactions_manager_config.transaction_fetcher_config,
+        );
 
         // install a listener for new pending transactions that are allowed to be propagated over
         // the network
@@ -326,7 +332,7 @@ where
             let transactions = self.pool.get_pooled_transaction_elements(
                 request.0,
                 GetPooledTransactionLimit::ResponseSizeSoftLimit(
-                    SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE,
+                    self.transaction_fetcher.info.soft_limit_byte_size_pooled_transactions_response,
                 ),
             );
 
@@ -1503,11 +1509,12 @@ mod tests {
 
         let pool = testing_pool();
 
+        let transactions_manager_config = config.transactions_manager_config.clone();
         let (_network_handle, _network, transactions, _) = NetworkManager::new(config)
             .await
             .unwrap()
             .into_builder()
-            .transactions(pool.clone())
+            .transactions(pool.clone(), transactions_manager_config)
             .split_with_handle();
 
         transactions
@@ -1553,11 +1560,12 @@ mod tests {
             .disable_discovery()
             .listener_port(0)
             .build(client);
+        let transactions_manager_config = config.transactions_manager_config.clone();
         let (network_handle, network, mut transactions, _) = NetworkManager::new(config)
             .await
             .unwrap()
             .into_builder()
-            .transactions(pool.clone())
+            .transactions(pool.clone(), transactions_manager_config)
             .split_with_handle();
 
         tokio::task::spawn(network);
@@ -1635,11 +1643,12 @@ mod tests {
             .disable_discovery()
             .listener_port(0)
             .build(client);
+        let transactions_manager_config = config.transactions_manager_config.clone();
         let (network_handle, network, mut transactions, _) = NetworkManager::new(config)
             .await
             .unwrap()
             .into_builder()
-            .transactions(pool.clone())
+            .transactions(pool.clone(), transactions_manager_config)
             .split_with_handle();
 
         tokio::task::spawn(network);
@@ -1723,11 +1732,12 @@ mod tests {
             .disable_discovery()
             .listener_port(0)
             .build(client);
+        let transactions_manager_config = config.transactions_manager_config.clone();
         let (network_handle, network, mut transactions, _) = NetworkManager::new(config)
             .await
             .unwrap()
             .into_builder()
-            .transactions(pool.clone())
+            .transactions(pool.clone(), transactions_manager_config)
             .split_with_handle();
         tokio::task::spawn(network);
 
@@ -1812,11 +1822,12 @@ mod tests {
             .disable_discovery()
             .listener_port(0)
             .build(client);
+        let transactions_manager_config = config.transactions_manager_config.clone();
         let (network_handle, network, mut transactions, _) = NetworkManager::new(config)
             .await
             .unwrap()
             .into_builder()
-            .transactions(pool.clone())
+            .transactions(pool.clone(), transactions_manager_config)
             .split_with_handle();
         tokio::task::spawn(network);
 

crates/net/network/tests/it/connect.rs

@@ -260,12 +260,13 @@ async fn test_connect_to_trusted_peer() {
 
     let client = NoopProvider::default();
     let config = NetworkConfigBuilder::new(secret_key).discovery(discv4).build(client);
+    let transactions_manager_config = config.transactions_manager_config.clone();
     let (handle, network, transactions, requests) = NetworkManager::new(config)
         .await
         .unwrap()
         .into_builder()
         .request_handler(client)
-        .transactions(testing_pool())
+        .transactions(testing_pool(), transactions_manager_config)
         .split_with_handle();
 
     let mut events = handle.event_listener();

crates/node-builder/src/builder.rs

@@ -23,7 +23,10 @@ use reth_db::{
     database_metrics::{DatabaseMetadata, DatabaseMetrics},
 };
 use reth_interfaces::p2p::either::EitherDownloader;
-use reth_network::{NetworkBuilder, NetworkEvents, NetworkHandle};
+use reth_network::{
+    transactions::{TransactionFetcherConfig, TransactionsManagerConfig},
+    NetworkBuilder, NetworkEvents, NetworkHandle,
+};
 use reth_node_core::{
     cli::config::{PayloadBuilderConfig, RethRpcConfig, RethTransactionPoolConfig},
     dirs::{ChainPath, DataDirPath},
@@ -731,8 +734,20 @@ impl<Node: FullNodeTypes> BuilderContext<Node> {
     where
         Pool: TransactionPool + Unpin + 'static,
     {
-        let (handle, network, txpool, eth) =
-            builder.transactions(pool).request_handler(self.provider().clone()).split_with_handle();
+        let (handle, network, txpool, eth) = builder
+            .transactions(
+                pool,
+                TransactionsManagerConfig {
+                    transaction_fetcher_config: TransactionFetcherConfig::new(
+                        self.config.network.soft_limit_byte_size_pooled_transactions_response,
+                        self.config
+                            .network
+                            .soft_limit_byte_size_pooled_transactions_response_on_pack_request,
+                    ),
+                },
+            )
+            .request_handler(self.provider().clone())
+            .split_with_handle();
 
         self.executor.spawn_critical("p2p txpool", txpool);
         self.executor.spawn_critical("p2p eth request handler", eth);

crates/node-core/Cargo.toml

@@ -46,6 +46,7 @@ reth-blockchain-tree.workspace = true
 revm-inspectors.workspace = true
 reth-snapshot.workspace = true
 reth-optimism-payload-builder = { workspace = true, optional = true }
+reth-eth-wire.workspace = true
 
 # async
 tokio.workspace = true

crates/node-core/src/args/network_args.rs

@@ -5,7 +5,14 @@ use clap::Args;
 use reth_config::Config;
 use reth_discv4::{DEFAULT_DISCOVERY_ADDR, DEFAULT_DISCOVERY_PORT};
 use reth_net_nat::NatResolver;
-use reth_network::{HelloMessageWithProtocols, NetworkConfigBuilder};
+use reth_network::{
+    transactions::{
+        TransactionFetcherConfig, TransactionsManagerConfig,
+        DEFAULT_SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE_ON_PACK_GET_POOLED_TRANSACTIONS_REQUEST,
+        SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE,
+    },
+    HelloMessageWithProtocols, NetworkConfigBuilder,
+};
 use reth_primitives::{mainnet_nodes, ChainSpec, NodeRecord};
 use secp256k1::SecretKey;
 use std::{net::Ipv4Addr, path::PathBuf, sync::Arc};
@@ -73,6 +80,23 @@ pub struct NetworkArgs {
     /// Maximum number of inbound requests. default: 30
     #[arg(long)]
     pub max_inbound_peers: Option<usize>,
+
+    /// Soft limit for the byte size of a [`PooledTransactions`](reth_eth_wire::PooledTransactions)
+    /// response on assembling a [`GetPooledTransactions`](reth_eth_wire::GetPooledTransactions)
+    /// request. Spec'd at 2 MiB.
+    ///
+    /// <https://github.com/ethereum/devp2p/blob/master/caps/eth.md#protocol-messages>.
+    #[arg(long = "pooled-tx-response-soft-limit", value_name = "BYTES", default_value_t = SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE, help = "Sets the soft limit for the byte size of pooled transactions response. Specified at 2 MiB by default. This is a spec'd value that should only be set for experimental purposes on a testnet.")]
+    pub soft_limit_byte_size_pooled_transactions_response: usize,
+
+    /// Default soft limit for the byte size of a
+    /// [`PooledTransactions`](reth_eth_wire::PooledTransactions) response on assembling a
+    /// [`GetPooledTransactions`](reth_eth_wire::PooledTransactions) request. This defaults to less
+    /// than the [`SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE`], at 2 MiB, used when
+    /// assembling a [`PooledTransactions`](reth_eth_wire::PooledTransactions) response. Default
+    /// is 128 KiB.
+    #[arg(long = "pooled-tx-pack-soft-limit", value_name = "BYTES", default_value_t = DEFAULT_SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE_ON_PACK_GET_POOLED_TRANSACTIONS_REQUEST)]
+    pub soft_limit_byte_size_pooled_transactions_response_on_pack_request: usize,
 }
 
 impl NetworkArgs {
@@ -98,12 +122,21 @@ impl NetworkArgs {
             .with_max_inbound_opt(self.max_inbound_peers)
             .with_max_outbound_opt(self.max_outbound_peers);
 
+        // Configure transactions manager
+        let transactions_manager_config = TransactionsManagerConfig {
+            transaction_fetcher_config: TransactionFetcherConfig::new(
+                self.soft_limit_byte_size_pooled_transactions_response,
+                self.soft_limit_byte_size_pooled_transactions_response_on_pack_request,
+            ),
+        };
+
         // Configure basic network stack
         let mut network_config_builder = config
             .network_config(self.nat, self.persistent_peers_file(peers_file), secret_key)
             .peer_config(peer_config)
             .boot_nodes(self.bootnodes.clone().unwrap_or(chain_bootnodes))
-            .chain_spec(chain_spec);
+            .chain_spec(chain_spec)
+            .transactions_manager_config(transactions_manager_config);
 
         // Configure node identity
         let peer_id = network_config_builder.get_peer_id();
@@ -155,6 +188,9 @@ impl Default for NetworkArgs {
             port: DEFAULT_DISCOVERY_PORT,
             max_outbound_peers: None,
             max_inbound_peers: None,
+            soft_limit_byte_size_pooled_transactions_response:
+                SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE,
+            soft_limit_byte_size_pooled_transactions_response_on_pack_request: DEFAULT_SOFT_LIMIT_BYTE_SIZE_POOLED_TRANSACTIONS_RESPONSE_ON_PACK_GET_POOLED_TRANSACTIONS_REQUEST,
         }
     }
 }

crates/node-core/src/args/txpool_args.rs

@@ -4,8 +4,8 @@ use crate::cli::config::RethTransactionPoolConfig;
 use clap::Args;
 use reth_primitives::Address;
 use reth_transaction_pool::{
-    LocalTransactionConfig, PoolConfig, PriceBumpConfig, SubPoolLimit, DEFAULT_PRICE_BUMP,
-    REPLACE_BLOB_PRICE_BUMP, TXPOOL_MAX_ACCOUNT_SLOTS_PER_SENDER,
+    validate::DEFAULT_MAX_TX_INPUT_BYTES, LocalTransactionConfig, PoolConfig, PriceBumpConfig,
+    SubPoolLimit, DEFAULT_PRICE_BUMP, REPLACE_BLOB_PRICE_BUMP, TXPOOL_MAX_ACCOUNT_SLOTS_PER_SENDER,
     TXPOOL_SUBPOOL_MAX_SIZE_MB_DEFAULT, TXPOOL_SUBPOOL_MAX_TXS_DEFAULT,
 };
 /// Parameters for debugging purposes
@@ -44,6 +44,11 @@ pub struct TxPoolArgs {
     /// Price bump percentage to replace an already existing blob transaction
     #[arg(long = "blobpool.pricebump", default_value_t = REPLACE_BLOB_PRICE_BUMP)]
     pub blob_transaction_price_bump: u128,
+
+    /// Max size in bytes of a single transaction allowed to enter the pool
+    #[arg(long = "txpool.max_tx_input_bytes", default_value_t = DEFAULT_MAX_TX_INPUT_BYTES)]
+    pub max_tx_input_bytes: usize,
+
     /// Flag to disable local transaction exemptions.
     #[arg(long = "txpool.nolocals")]
     pub no_locals: bool,
@@ -67,6 +72,7 @@ impl Default for TxPoolArgs {
             max_account_slots: TXPOOL_MAX_ACCOUNT_SLOTS_PER_SENDER,
             price_bump: DEFAULT_PRICE_BUMP,
             blob_transaction_price_bump: REPLACE_BLOB_PRICE_BUMP,
+            max_tx_input_bytes: DEFAULT_MAX_TX_INPUT_BYTES,
             no_locals: false,
             locals: Default::default(),
             no_local_transactions_propagation: false,

crates/node-core/src/node_config.rs

@@ -35,7 +35,10 @@ use reth_interfaces::{
     },
     RethResult,
 };
-use reth_network::{NetworkBuilder, NetworkConfig, NetworkHandle, NetworkManager};
+use reth_network::{
+    transactions::{TransactionFetcherConfig, TransactionsManagerConfig},
+    NetworkBuilder, NetworkConfig, NetworkHandle, NetworkManager,
+};
 use reth_node_api::ConfigureEvmEnv;
 use reth_primitives::{
     constants::eip4844::{LoadKzgSettingsError, MAINNET_KZG_TRUSTED_SETUP},
@@ -470,6 +473,8 @@ impl NodeConfig {
             .kzg_settings(self.kzg_settings()?)
             // use an additional validation task so we can validate transactions in parallel
             .with_additional_tasks(1)
+            // set the max tx size in bytes allowed to enter the pool
+            .with_max_tx_input_bytes(self.txpool.max_tx_input_bytes)
             .build_with_tasks(blockchain_db.clone(), executor.clone(), blob_store.clone());
 
         let transaction_pool =
@@ -625,8 +630,19 @@ impl NodeConfig {
         C: BlockReader + HeaderProvider + Clone + Unpin + 'static,
         Pool: TransactionPool + Unpin + 'static,
     {
-        let (handle, network, txpool, eth) =
-            builder.transactions(pool).request_handler(client).split_with_handle();
+        let (handle, network, txpool, eth) = builder
+            .transactions(
+                pool, // Configure transactions manager
+                TransactionsManagerConfig {
+                    transaction_fetcher_config: TransactionFetcherConfig::new(
+                        self.network.soft_limit_byte_size_pooled_transactions_response,
+                        self.network
+                            .soft_limit_byte_size_pooled_transactions_response_on_pack_request,
+                    ),
+                },
+            )
+            .request_handler(client)
+            .split_with_handle();
 
         task_executor.spawn_critical("p2p txpool", txpool);
         task_executor.spawn_critical("p2p eth request handler", eth);

crates/transaction-pool/src/validate/constants.rs

@@ -4,11 +4,12 @@
 /// O(maxslots), where max slots are 4 currently).
 pub const TX_SLOT_BYTE_SIZE: usize = 32 * 1024;
 
-/// [`MAX_TX_INPUT_BYTES`] is the maximum size a single transaction can have. This field has
-/// non-trivial consequences: larger transactions are significantly harder and
+/// [`DEFAULT_MAX_TX_INPUT_BYTES`] is the default maximum size a single transaction can have. This
+/// field has non-trivial consequences: larger transactions are significantly harder and
 /// more expensive to propagate; larger transactions also take more resources
-/// to validate whether they fit into the pool or not.
-pub const MAX_TX_INPUT_BYTES: usize = 4 * TX_SLOT_BYTE_SIZE; // 128KB
+/// to validate whether they fit into the pool or not. Default is 4 times [`TX_SLOT_BYTE_SIZE`],
+/// which defaults to 32 KiB, so 128 KiB.
+pub const DEFAULT_MAX_TX_INPUT_BYTES: usize = 4 * TX_SLOT_BYTE_SIZE; // 128KB
 
 /// Maximum bytecode to permit for a contract.
 pub const MAX_CODE_BYTE_SIZE: usize = 24576;

crates/transaction-pool/src/validate/eth.rs

@@ -4,7 +4,7 @@ use crate::{
     blobstore::BlobStore,
     error::{Eip4844PoolTransactionError, InvalidPoolTransactionError},
     traits::TransactionOrigin,
-    validate::{ValidTransaction, ValidationTask, MAX_INIT_CODE_BYTE_SIZE, MAX_TX_INPUT_BYTES},
+    validate::{ValidTransaction, ValidationTask, MAX_INIT_CODE_BYTE_SIZE},
     EthBlobTransactionSidecar, EthPoolTransaction, LocalTransactionConfig, PoolTransaction,
     TransactionValidationOutcome, TransactionValidationTaskExecutor, TransactionValidator,
 };
@@ -29,6 +29,8 @@ use tokio::sync::Mutex;
 #[cfg(feature = "optimism")]
 use reth_revm::optimism::RethL1BlockInfo;
 
+use super::constants::DEFAULT_MAX_TX_INPUT_BYTES;
+
 /// Validator for Ethereum transactions.
 #[derive(Debug, Clone)]
 pub struct EthTransactionValidator<Client, T> {
@@ -118,6 +120,8 @@ pub(crate) struct EthTransactionValidatorInner<Client, T> {
     kzg_settings: Arc<KzgSettings>,
     /// How to handle [TransactionOrigin::Local](TransactionOrigin) transactions.
     local_transactions_config: LocalTransactionConfig,
+    /// Maximum size in bytes a single transaction can have in order to be accepted into the pool.
+    max_tx_input_bytes: usize,
     /// Marker for the transaction type
     _marker: PhantomData<T>,
 }
@@ -192,11 +196,11 @@ where
         };
 
         // Reject transactions over defined size to prevent DOS attacks
-        if transaction.size() > MAX_TX_INPUT_BYTES {
+        if transaction.size() > self.max_tx_input_bytes {
             let size = transaction.size();
             return TransactionValidationOutcome::Invalid(
                 transaction,
-                InvalidPoolTransactionError::OversizedData(size, MAX_TX_INPUT_BYTES),
+                InvalidPoolTransactionError::OversizedData(size, self.max_tx_input_bytes),
             )
         }
 
@@ -480,6 +484,8 @@ pub struct EthTransactionValidatorBuilder {
     kzg_settings: Arc<KzgSettings>,
     /// How to handle [TransactionOrigin::Local](TransactionOrigin) transactions.
     local_transactions_config: LocalTransactionConfig,
+    /// Max size in bytes of a single transaction allowed
+    max_tx_input_bytes: usize,
 }
 
 impl EthTransactionValidatorBuilder {
@@ -495,6 +501,7 @@ impl EthTransactionValidatorBuilder {
             additional_tasks: 1,
             kzg_settings: Arc::clone(&MAINNET_KZG_TRUSTED_SETUP),
             local_transactions_config: Default::default(),
+            max_tx_input_bytes: DEFAULT_MAX_TX_INPUT_BYTES,
 
             // by default all transaction types are allowed
             eip2718: true,
@@ -589,6 +596,12 @@ impl EthTransactionValidatorBuilder {
         self
     }
 
+    /// Sets a max size in bytes of a single transaction allowed into the pool
+    pub const fn with_max_tx_input_bytes(mut self, max_tx_input_bytes: usize) -> Self {
+        self.max_tx_input_bytes = max_tx_input_bytes;
+        self
+    }
+
     /// Builds a the [EthTransactionValidator] without spawning validator tasks.
     pub fn build<Client, Tx, S>(
         self,
@@ -609,6 +622,7 @@ impl EthTransactionValidatorBuilder {
             minimum_priority_fee,
             kzg_settings,
             local_transactions_config,
+            max_tx_input_bytes,
             ..
         } = self;
 
@@ -627,6 +641,7 @@ impl EthTransactionValidatorBuilder {
             blob_store: Box::new(blob_store),
             kzg_settings,
             local_transactions_config,
+            max_tx_input_bytes,
             _marker: Default::default(),
         };
 

crates/transaction-pool/src/validate/mod.rs

@@ -23,7 +23,7 @@ pub use task::{TransactionValidationTaskExecutor, ValidationTask};
 
 /// Validation constants.
 pub use constants::{
-    MAX_CODE_BYTE_SIZE, MAX_INIT_CODE_BYTE_SIZE, MAX_TX_INPUT_BYTES, TX_SLOT_BYTE_SIZE,
+    DEFAULT_MAX_TX_INPUT_BYTES, MAX_CODE_BYTE_SIZE, MAX_INIT_CODE_BYTE_SIZE, TX_SLOT_BYTE_SIZE,
 };
 
 /// A Result type returned after checking a transaction's validity.

examples/network-txpool.rs

@@ -35,10 +35,12 @@ async fn main() -> eyre::Result<()> {
 
     // Configure the network
     let config = NetworkConfig::builder(local_key).mainnet_boot_nodes().build(client);
-
+    let transactions_manager_config = config.transactions_manager_config.clone();
     // create the network instance
-    let (_handle, network, txpool, _) =
-        NetworkManager::builder(config).await?.transactions(pool.clone()).split_with_handle();
+    let (_handle, network, txpool, _) = NetworkManager::builder(config)
+        .await?
+        .transactions(pool.clone(), transactions_manager_config)
+        .split_with_handle();
 
     // spawn the network task
     tokio::task::spawn(network);