Ethstore optimizations (#6827)

ethcore/src/account_provider/mod.rs

@@ -269,7 +269,7 @@ impl AccountProvider {
 
 	/// Checks whether an account with a given address is present.
 	pub fn has_account(&self, address: Address) -> Result<bool, Error> {
-		Ok(self.accounts()?.iter().any(|&a| a == address))
+		Ok(self.sstore.account_ref(&address).is_ok() && !self.blacklisted_accounts.contains(&address))
 	}
 
 	/// Returns addresses of all accounts.

ethcore/src/miner/miner.rs

@@ -647,10 +647,6 @@ impl Miner {
 		condition: Option<TransactionCondition>,
 		transaction_queue: &mut BanningTransactionQueue,
 	) -> Vec<Result<TransactionImportResult, Error>> {
-		let accounts = self.accounts.as_ref()
-			.and_then(|provider| provider.accounts().ok())
-			.map(|accounts| accounts.into_iter().collect::<HashSet<_>>());
-
 		let best_block_header = client.best_block_header().decode();
 		let insertion_time = client.chain_info().best_block_number;
 
@@ -669,8 +665,8 @@ impl Miner {
 						Err(e)
 					},
 					Ok(transaction) => {
-						let origin = accounts.as_ref().and_then(|accounts| {
-							match accounts.contains(&transaction.sender()) {
+						let origin = self.accounts.as_ref().and_then(|accounts| {
+							match accounts.has_account(transaction.sender()).unwrap_or(false) {
 								true => Some(TransactionOrigin::Local),
 								false => None,
 							}

ethstore/src/dir/disk.rs

@@ -122,6 +122,13 @@ impl<T> DiskDirectory<T> where T: KeyFileManager {
 		Ok(hasher.finish())
 	}
 
+	fn last_modification_date(&self) -> Result<u64, Error> {
+		use std::time::{Duration, UNIX_EPOCH};
+		let duration = fs::metadata(&self.path)?.modified()?.duration_since(UNIX_EPOCH).unwrap_or(Duration::default());
+		let timestamp = duration.as_secs() ^ (duration.subsec_nanos() as u64);
+		Ok(timestamp)
+	}
+
 	/// all accounts found in keys directory
 	fn files_content(&self) -> Result<HashMap<PathBuf, SafeAccount>, Error> {
 		// it's not done using one iterator cause
@@ -226,7 +233,7 @@ impl<T> KeyDirectory for DiskDirectory<T> where T: KeyFileManager {
 	}
 
 	fn unique_repr(&self) -> Result<u64, Error> {
-		self.files_hash()
+		self.last_modification_date()
 	}
 }
 

ethstore/src/ethstore.rs

@@ -18,6 +18,7 @@ use std::collections::{BTreeMap, HashMap};
 use std::mem;
 use std::path::PathBuf;
 use parking_lot::{Mutex, RwLock};
+use std::time::{Instant, Duration};
 
 use crypto::KEY_ITERATIONS;
 use random::Random;
@@ -28,6 +29,8 @@ use presale::PresaleWallet;
 use json::{self, Uuid, OpaqueKeyFile};
 use {import, Error, SimpleSecretStore, SecretStore, SecretVaultRef, StoreAccountRef, Derivation, OpaqueSecret};
 
+const REFRESH_TIME_SEC: u64 = 5;
+
 /// Accounts store.
 pub struct EthStore {
 	store: EthMultiStore,
@@ -245,7 +248,12 @@ pub struct EthMultiStore {
 	// order lock: cache, then vaults
 	cache: RwLock<BTreeMap<StoreAccountRef, Vec<SafeAccount>>>,
 	vaults: Mutex<HashMap<String, Box<VaultKeyDirectory>>>,
-	dir_hash: Mutex<Option<u64>>,
+	timestamp: Mutex<Timestamp>,
+}
+
+struct Timestamp {
+	dir_hash: Option<u64>,
+	last_checked: Instant,
 }
 
 impl EthMultiStore {
@@ -261,20 +269,27 @@ impl EthMultiStore {
 			vaults: Mutex::new(HashMap::new()),
 			iterations: iterations,
 			cache: Default::default(),
-			dir_hash: Default::default(),
+			timestamp: Mutex::new(Timestamp {
+				dir_hash: None,
+				last_checked: Instant::now(),
+			}),
 		};
 		store.reload_accounts()?;
 		Ok(store)
 	}
 
 	fn reload_if_changed(&self) -> Result<(), Error> {
-		let mut last_dir_hash = self.dir_hash.lock();
-		let dir_hash = Some(self.dir.unique_repr()?);
-		if *last_dir_hash == dir_hash {
-			return Ok(())
+		let mut last_timestamp = self.timestamp.lock();
+		let now = Instant::now();
+		if (now - last_timestamp.last_checked) > Duration::from_secs(REFRESH_TIME_SEC) {
+			let dir_hash = Some(self.dir.unique_repr()?);
+			last_timestamp.last_checked = now;
+			if last_timestamp.dir_hash == dir_hash {
+				return Ok(())
+			}
+			self.reload_accounts()?;
+			last_timestamp.dir_hash = dir_hash;
 		}
-		self.reload_accounts()?;
-		*last_dir_hash = dir_hash;
 		Ok(())
 	}
 
@@ -455,11 +470,11 @@ impl SimpleSecretStore for EthMultiStore {
 	}
 
 	fn account_ref(&self, address: &Address) -> Result<StoreAccountRef, Error> {
+		use std::collections::Bound;
 		self.reload_if_changed()?;
-		self.cache.read().keys()
-			.find(|r| &r.address == address)
-			.cloned()
-			.ok_or(Error::InvalidAccount)
+		let cache = self.cache.read();
+		let mut r = cache.range((Bound::Included(*address), Bound::Included(*address)));
+		r.next().ok_or(Error::InvalidAccount).map(|(k, _)| k.clone())
 	}
 
 	fn accounts(&self) -> Result<Vec<StoreAccountRef>, Error> {

ethstore/src/secret_store.rs

@@ -16,6 +16,7 @@
 
 use std::hash::{Hash, Hasher};
 use std::path::PathBuf;
+use std::cmp::Ordering;
 use ethkey::{Address, Message, Signature, Secret, Public};
 use Error;
 use json::{Uuid, OpaqueKeyFile};
@@ -32,12 +33,24 @@ pub enum SecretVaultRef {
 }
 
 /// Stored account reference
-#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, Clone, PartialEq, Eq, Ord)]
 pub struct StoreAccountRef {
-	/// Vault reference
-	pub vault: SecretVaultRef,
 	/// Account address
 	pub address: Address,
+	/// Vault reference
+	pub vault: SecretVaultRef,
+}
+
+impl PartialOrd for StoreAccountRef {
+	fn partial_cmp(&self, other: &StoreAccountRef) -> Option<Ordering> {
+		Some(self.address.cmp(&other.address).then_with(|| self.vault.cmp(&other.vault)))
+	}
+}
+
+impl ::std::borrow::Borrow<Address> for StoreAccountRef {
+	fn borrow(&self) -> &Address {
+		&self.address
+	}
 }
 
 /// Simple Secret Store API