Restore txpool after reboot

[jsvisa]

Describe the feature

Reth will not dump the txpool's content into disk and restore them after reboot, this will cause the local txs to be missing if they were not announced before reboot.

Additional context

No response

[mattsse]

right, we definitely want this

I guess we can get away with only dumping local txs?
or at least start with that

[jsvisa]

I guess we can get away with only dumping local txs?
or at least start with that

I totally agree with the only dump/restore the local txs

[mattsse]

Adding a bit more context

we can now perform cleanup tasks like:

reth/bin/reth/src/node/mod.rs

Lines 1036 to 1042 in 12d9559

	async fn run_network_until_shutdown<C>(
	shutdown: reth_tasks::shutdown::GracefulShutdown,
	network: NetworkManager<C>,
	persistent_peers_file: Option<PathBuf>,
	) where
	C: BlockReader + HeaderProvider + Clone + Unpin + 'static,
	{

so what we want here is

a new task that awaits the shutdown, fetches all local transactions and writes them to a file
and before it awaits the shutdown it reads local transactions and simply inserts all of them.

this function should go here:

reth/crates/transaction-pool/src/maintain.rs

Line 49 in 12d9559

we want a specific location for the file, should be a constant like:

reth/bin/reth/src/dirs.rs

Lines 288 to 294 in 12d9559

	/// Returns the path to the blobstore directory for this chain where blobs of unfinalized
	/// transactions are stored.
	///
	/// `<DIR>/<CHAIN_ID>/blobstore`
	pub fn blobstore_path(&self) -> PathBuf {
	self.0.join("blobstore").into()
	}

[allnil]

Take it