Add custom tx pool

This should be used as a workaround for: paritytech/polkadot-sdk#1202

node/service/src/custom_tx_pool.rs

@@ -0,0 +1,101 @@
+use futures::Future;
+use sc_transaction_pool_api::{
+	ImportNotificationStream, PoolFuture, PoolStatus, ReadyTransactions, TransactionFor,
+	TransactionPool, TransactionSource, TransactionStatusStreamFor, TxHash,
+};
+use sp_runtime::traits::{Block as BlockT, NumberFor};
+use std::{collections::HashMap, pin::Pin, sync::Arc};
+
+pub struct CustomPool<I> {
+	inner_pool: Arc<I>,
+}
+
+impl<I> CustomPool<I> {
+	pub fn new(inner_pool: Arc<I>) -> Self {
+		Self { inner_pool }
+	}
+}
+
+impl<I> TransactionPool for CustomPool<I>
+where
+	I: TransactionPool,
+{
+	type Block = I::Block;
+	type Hash = I::Hash;
+	type InPoolTransaction = I::InPoolTransaction;
+	type Error = I::Error;
+
+	fn submit_at(
+		&self,
+		at: <Self::Block as BlockT>::Hash,
+		source: TransactionSource,
+		xts: Vec<TransactionFor<Self>>,
+	) -> PoolFuture<Vec<Result<TxHash<Self>, Self::Error>>, Self::Error> {
+		self.inner_pool.submit_at(at, source, xts)
+	}
+
+	fn submit_one(
+		&self,
+		at: <Self::Block as BlockT>::Hash,
+		source: TransactionSource,
+		xt: TransactionFor<Self>,
+	) -> PoolFuture<TxHash<Self>, Self::Error> {
+		self.inner_pool.submit_one(at, source, xt)
+	}
+
+	fn submit_and_watch(
+		&self,
+		at: <Self::Block as BlockT>::Hash,
+		source: TransactionSource,
+		xt: TransactionFor<Self>,
+	) -> PoolFuture<Pin<Box<TransactionStatusStreamFor<Self>>>, Self::Error> {
+		self.inner_pool.submit_and_watch(at, source, xt)
+	}
+
+	fn remove_invalid(&self, _: &[TxHash<Self>]) -> Vec<Arc<Self::InPoolTransaction>> {
+		// Don't do anything on purpose.
+		Vec::new()
+	}
+
+	fn status(&self) -> PoolStatus {
+		self.inner_pool.status()
+	}
+
+	fn import_notification_stream(&self) -> ImportNotificationStream<TxHash<Self>> {
+		self.inner_pool.import_notification_stream()
+	}
+
+	fn hash_of(&self, xt: &TransactionFor<Self>) -> TxHash<Self> {
+		self.inner_pool.hash_of(xt)
+	}
+
+	fn on_broadcasted(&self, propagations: HashMap<TxHash<Self>, Vec<String>>) {
+		self.inner_pool.on_broadcasted(propagations)
+	}
+
+	fn ready_transaction(&self, hash: &TxHash<Self>) -> Option<Arc<Self::InPoolTransaction>> {
+		self.inner_pool.ready_transaction(hash)
+	}
+
+	fn ready_at(
+		&self,
+		at: NumberFor<Self::Block>,
+	) -> Pin<
+		Box<
+			dyn Future<
+					Output = Box<dyn ReadyTransactions<Item = Arc<Self::InPoolTransaction>> + Send>,
+				> + Send,
+		>,
+	> {
+		self.inner_pool.ready_at(at)
+	}
+
+	fn ready(&self) -> Box<dyn ReadyTransactions<Item = Arc<Self::InPoolTransaction>> + Send> {
+		self.inner_pool.ready()
+	}
+
+	fn futures(&self) -> Vec<Self::InPoolTransaction> {
+		self.inner_pool.futures()
+	}
+}
+

node/service/src/lib.rs

@@ -8,5 +8,6 @@
 pub mod block_sealing;
 pub mod chain_spec;
 pub mod common;
+mod custom_tx_pool;
 pub mod rpc;
 pub mod service;

node/service/src/service.rs

@@ -437,7 +437,7 @@ fn start_consensus(
 	let proposer_factory = sc_basic_authorship::ProposerFactory::with_proof_recording(
 		task_manager.spawn_handle(),
 		client.clone(),
-		transaction_pool,
+		std::sync::Arc::new(crate::custom_tx_pool::CustomPool::new(transaction_pool)),
 		prometheus_registry,
 		telemetry.clone(),
 	);