Fix up the pending set stuff.

ethcore/src/client/client.rs

@@ -792,8 +792,8 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		}
 	}
 
-	fn all_transactions(&self) -> Vec<SignedTransaction> {
-		self.miner.all_transactions()
+	fn pending_transactions(&self) -> Vec<SignedTransaction> {
+		self.miner.pending_transactions()
 	}
 }
 

ethcore/src/client/mod.rs

@@ -197,7 +197,7 @@ pub trait BlockChainClient : Sync + Send {
 	fn queue_transactions(&self, transactions: Vec<Bytes>);
 
 	/// list all transactions
-	fn all_transactions(&self) -> Vec<SignedTransaction>;
+	fn pending_transactions(&self) -> Vec<SignedTransaction>;
 
 	/// Get the gas price distribution.
 	fn gas_price_statistics(&self, sample_size: usize, distribution_size: usize) -> Result<Vec<U256>, ()> {

ethcore/src/client/test_client.rs

@@ -500,7 +500,7 @@ impl BlockChainClient for TestBlockChainClient {
 		self.import_transactions(tx);
 	}
 
-	fn all_transactions(&self) -> Vec<SignedTransaction> {
-		self.miner.all_transactions()
+	fn pending_transactions(&self) -> Vec<SignedTransaction> {
+		self.miner.pending_transactions()
 	}
 }

ethcore/src/miner/miner.rs

@@ -29,6 +29,18 @@ use spec::Spec;
 use engine::Engine;
 use miner::{MinerService, MinerStatus, TransactionQueue, AccountDetails, TransactionImportResult, TransactionOrigin};
 
+/// Different possible definitions for pending transaction set.
+#[derive(Debug)]
+pub enum PendingSet {
+	/// Always just the transactions in the queue. These have had only cheap checks.
+	AlwaysQueue,
+	/// Always just the transactions in the sealing block. These have had full checks but
+	/// may be empty if the node is not actively mining or has force_sealing enabled.
+	AlwaysSealing,
+	/// Try the sealing block, but if it is not currently sealing, fallback to the queue.
+	SealingOrElseQueue,
+}
+
 /// Configures the behaviour of the miner.
 #[derive(Debug)]
 pub struct MinerOptions {
@@ -42,7 +54,7 @@ pub struct MinerOptions {
 	/// If `None`, then no limit.
 	pub max_tx_gas: Option<U256>,
 	/// Whether we should fallback to providing all the queue's transactions or just pending.
-	pub strict_valid_pending: bool,
+	pub pending_set: PendingSet,
 }
 
 impl Default for MinerOptions {
@@ -52,7 +64,7 @@ impl Default for MinerOptions {
 			reseal_on_external_tx: true,
 			reseal_on_own_tx: true,
 			max_tx_gas: None,
-			strict_valid_pending: false,
+			pending_set: PendingSet::AlwaysQueue,
 		}
 	}
 }
@@ -462,24 +474,6 @@ impl MinerService for Miner {
 		imported
 	}
 
-	fn pending_transactions_hashes(&self) -> Vec<H256> {
-		let queue = self.transaction_queue.lock().unwrap();
-		match (self.sealing_enabled.load(atomic::Ordering::Relaxed), self.sealing_work.lock().unwrap().peek_last_ref()) {
-			(true, Some(pending)) => pending.transactions().iter().map(|t| t.hash()).collect(),
-			_ if self.options.strict_valid_pending => Vec::new(),
-			_ => queue.pending_hashes(),
-		}
-	}
-
-	fn transaction(&self, hash: &H256) -> Option<SignedTransaction> {
-		let queue = self.transaction_queue.lock().unwrap();
-		match (self.sealing_enabled.load(atomic::Ordering::Relaxed), self.sealing_work.lock().unwrap().peek_last_ref()) {
-			(true, Some(pending)) => pending.transactions().iter().find(|t| &t.hash() == hash).cloned(),
-			_ if self.options.strict_valid_pending => None,
-			_ => queue.find(hash),
-		}
-	}
-
 	fn all_transactions(&self) -> Vec<SignedTransaction> {
 		let queue = self.transaction_queue.lock().unwrap();
 		queue.top_transactions()
@@ -487,11 +481,41 @@ impl MinerService for Miner {
 
 	fn pending_transactions(&self) -> Vec<SignedTransaction> {
 		let queue = self.transaction_queue.lock().unwrap();
+		let sw = self.sealing_work.lock().unwrap();
 		// TODO: should only use the sealing_work when it's current (it could be an old block)
-		match (self.sealing_enabled.load(atomic::Ordering::Relaxed), self.sealing_work.lock().unwrap().peek_last_ref()) {
-			(true, Some(pending)) => pending.transactions().clone(),
-			_ if self.options.strict_valid_pending => Vec::new(),
-			_ => queue.top_transactions(),
+		let sealing_set = match self.sealing_enabled.load(atomic::Ordering::Relaxed) {
+			true => sw.peek_last_ref(),
+			false => None,
+		};
+		match (&self.options.pending_set, sealing_set) {
+			(&PendingSet::AlwaysQueue, _) | (&PendingSet::SealingOrElseQueue, None) => queue.top_transactions(),
+			(_, sealing) => sealing.map(|s| s.transactions().clone()).unwrap_or(Vec::new()),
+		}
+	}
+
+	fn pending_transactions_hashes(&self) -> Vec<H256> {
+		let queue = self.transaction_queue.lock().unwrap();
+		let sw = self.sealing_work.lock().unwrap();
+		let sealing_set = match self.sealing_enabled.load(atomic::Ordering::Relaxed) {
+			true => sw.peek_last_ref(),
+			false => None,
+		};
+		match (&self.options.pending_set, sealing_set) {
+			(&PendingSet::AlwaysQueue, _) | (&PendingSet::SealingOrElseQueue, None) => queue.pending_hashes(),
+			(_, sealing) => sealing.map(|s| s.transactions().iter().map(|t| t.hash()).collect()).unwrap_or(Vec::new()),
+		}
+	}
+
+	fn transaction(&self, hash: &H256) -> Option<SignedTransaction> {
+		let queue = self.transaction_queue.lock().unwrap();
+		let sw = self.sealing_work.lock().unwrap();
+		let sealing_set = match self.sealing_enabled.load(atomic::Ordering::Relaxed) {
+			true => sw.peek_last_ref(),
+			false => None,
+		};
+		match (&self.options.pending_set, sealing_set) {
+			(&PendingSet::AlwaysQueue, _) | (&PendingSet::SealingOrElseQueue, None) => queue.find(hash),
+			(_, sealing) => sealing.and_then(|s| s.transactions().iter().find(|t| &t.hash() == hash).cloned()),
 		}
 	}
 

ethcore/src/miner/mod.rs

@@ -47,7 +47,7 @@ mod external;
 mod transaction_queue;
 
 pub use self::transaction_queue::{TransactionQueue, AccountDetails, TransactionImportResult, TransactionOrigin};
-pub use self::miner::{Miner, MinerOptions};
+pub use self::miner::{Miner, MinerOptions, PendingSet};
 pub use self::external::{ExternalMiner, ExternalMinerService};
 
 use std::collections::BTreeMap;

parity/cli.rs

@@ -141,9 +141,14 @@ Sealing/Mining Options:
                            all - reseal on all new transactions [default: all].
   --max-tx-gas GAS         Apply a limit of GAS as the maximum amount of gas
                            a single transaction may have for it to be mined.
-  --relay-validity REQ     Requirements for relaying. REQ may be:
-                           cheap - Relay only after cheap checks;
-                           strict - Relay only once executed [default: cheap].
+  --relay-set SET          Set of transactions to relay. SET may be:
+                           cheap - Relay any transaction in the queue (this
+                           may include invalid transactions);
+                           strict - Relay only executed transactions (this
+                           guarantees we don't relay invalid transactions, but
+                           means we relay nothing if not mining);
+                           lenient - Same as struct when mining, and cheap
+                           when not [default: cheap].
   --usd-per-tx USD         Amount of USD to be paid for a basic transaction
                            [default: 0.005]. The minimum gas price is set
                            accordingly.
@@ -296,7 +301,7 @@ pub struct Args {
 	pub flag_force_sealing: bool,
 	pub flag_reseal_on_txs: String,
 	pub flag_max_tx_gas: Option<String>,
-	pub flag_relay_validity: String,
+	pub flag_relay_set: String,
 	pub flag_author: Option<String>,
 	pub flag_usd_per_tx: String,
 	pub flag_usd_per_eth: String,

parity/configuration.rs

@@ -27,7 +27,7 @@ use util::*;
 use ethcore::account_provider::AccountProvider;
 use util::network_settings::NetworkSettings;
 use ethcore::client::{append_path, get_db_path, ClientConfig, Switch, VMType};
-use ethcore::miner::MinerOptions;
+use ethcore::miner::{MinerOptions, PendingSet};
 use ethcore::ethereum;
 use ethcore::spec::Spec;
 use ethsync::SyncConfig;
@@ -89,10 +89,11 @@ impl Configuration {
 			reseal_on_external_tx: ext,
 			reseal_on_own_tx: own,
 			max_tx_gas: self.args.flag_max_tx_gas.as_ref().map(|d| Self::decode_u256(d, "--max-tx-gas")),
-			strict_valid_pending: match self.args.flag_relay_validity.as_str() {
-				"cheap" => false,
-				"strict" => true,
-				x => die!("{}: Invalid value for --relay-validity option. Use --help for more information.", x)
+			pending_set: match self.args.flag_relay_set.as_str() {
+				"cheap" => PendingSet::AlwaysQueue,
+				"strict" => PendingSet::AlwaysSealing,
+				"lenient" => PendingSet::SealingOrElseQueue,
+				x => die!("{}: Invalid value for --relay-set option. Use --help for more information.", x)
 			},
 		}
 	}

sync/src/chain.rs

@@ -1314,7 +1314,7 @@ impl ChainSync {
 			return 0;
 		}
 
-		let mut transactions = io.chain().all_transactions();
+		let mut transactions = io.chain().pending_transactions();
 		if transactions.is_empty() {
 			return 0;
 		}