Merge branch 'master' of github.com:ethcore/parity into simplified_block_opening

Cargo.lock

@@ -289,11 +289,11 @@ dependencies = [
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime_guess 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-dapps 0.3.0 (git+https://github.com/ethcore/parity-dapps-rs.git)",
- "parity-dapps-builtins 0.5.0 (git+https://github.com/ethcore/parity-dapps-builtins-rs.git)",
+ "parity-dapps-builtins 0.5.1 (git+https://github.com/ethcore/parity-dapps-builtins-rs.git)",
- "parity-dapps-dao 0.3.0 (git+https://github.com/ethcore/parity-dapps-dao-rs.git)",
+ "parity-dapps-dao 0.4.0 (git+https://github.com/ethcore/parity-dapps-dao-rs.git)",
- "parity-dapps-makerotc 0.2.0 (git+https://github.com/ethcore/parity-dapps-makerotc-rs.git)",
+ "parity-dapps-makerotc 0.3.0 (git+https://github.com/ethcore/parity-dapps-makerotc-rs.git)",
  "parity-dapps-status 0.5.0 (git+https://github.com/ethcore/parity-dapps-status-rs.git)",
- "parity-dapps-wallet 0.5.0 (git+https://github.com/ethcore/parity-dapps-wallet-rs.git)",
+ "parity-dapps-wallet 0.6.0 (git+https://github.com/ethcore/parity-dapps-wallet-rs.git)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.7.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_codegen 0.7.7 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -374,6 +374,7 @@ dependencies = [
  "jsonrpc-core 2.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-minimal-sysui 0.1.0 (git+https://github.com/ethcore/parity-dapps-minimal-sysui-rs.git)",
+ "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "ws 0.4.6 (git+https://github.com/ethcore/ws-rs.git)",
 ]
@@ -899,24 +900,24 @@ dependencies = [
 
 [[package]]
 name = "parity-dapps-builtins"
-version = "0.5.0"
+version = "0.5.1"
-source = "git+https://github.com/ethcore/parity-dapps-builtins-rs.git#8bbf0421e376f9496d70adc62c1c6d7f492df817"
+source = "git+https://github.com/ethcore/parity-dapps-builtins-rs.git#d3c95d62ffaa57016b162a9a9f0e6dd629dab423"
 dependencies = [
  "parity-dapps 0.3.0 (git+https://github.com/ethcore/parity-dapps-rs.git)",
 ]
 
 [[package]]
 name = "parity-dapps-dao"
-version = "0.3.0"
+version = "0.4.0"
-source = "git+https://github.com/ethcore/parity-dapps-dao-rs.git#5723ccc5b93010caa8f4aee248d89ae13401389b"
+source = "git+https://github.com/ethcore/parity-dapps-dao-rs.git#18f4b839b20fbdf8e0d163e14d25aafee603ac4b"
 dependencies = [
  "parity-dapps 0.3.0 (git+https://github.com/ethcore/parity-dapps-rs.git)",
 ]
 
 [[package]]
 name = "parity-dapps-makerotc"
-version = "0.2.0"
+version = "0.3.0"
-source = "git+https://github.com/ethcore/parity-dapps-makerotc-rs.git#39e654469ab659dc5570ba1ec94ca0f943aaff16"
+source = "git+https://github.com/ethcore/parity-dapps-makerotc-rs.git#7b771f217a3eefeb9a976c7ed470ca49fd9a9daa"
 dependencies = [
  "parity-dapps 0.3.0 (git+https://github.com/ethcore/parity-dapps-rs.git)",
 ]
@@ -924,15 +925,15 @@ dependencies = [
 [[package]]
 name = "parity-dapps-status"
 version = "0.5.0"
-source = "git+https://github.com/ethcore/parity-dapps-status-rs.git#e1caeeacf4b29da586572798881974521e6e8caf"
+source = "git+https://github.com/ethcore/parity-dapps-status-rs.git#53e159f52013be5d2e8ba7eca35f605ad6e3bfa9"
 dependencies = [
  "parity-dapps 0.3.0 (git+https://github.com/ethcore/parity-dapps-rs.git)",
 ]
 
 [[package]]
 name = "parity-dapps-wallet"
-version = "0.5.0"
+version = "0.6.0"
-source = "git+https://github.com/ethcore/parity-dapps-wallet-rs.git#25402ce0a02ae49eb66c9e3852b392267a027ea3"
+source = "git+https://github.com/ethcore/parity-dapps-wallet-rs.git#ad23b093d47527333a262c95e6fb20a97d15d6e6"
 dependencies = [
  "parity-dapps 0.3.0 (git+https://github.com/ethcore/parity-dapps-rs.git)",
 ]
@@ -940,7 +941,7 @@ dependencies = [
 [[package]]
 name = "parity-minimal-sysui"
 version = "0.1.0"
-source = "git+https://github.com/ethcore/parity-dapps-minimal-sysui-rs.git#bc5d76f9666ce19993e6f7b636a3a7af329ea19e"
+source = "git+https://github.com/ethcore/parity-dapps-minimal-sysui-rs.git#cb27ae09ee18773ccca6ba2ac74fa3128047a652"
 
 [[package]]
 name = "phf"
@@ -1453,7 +1454,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "ws"
 version = "0.4.6"
-source = "git+https://github.com/ethcore/ws-rs.git#c0c2a3fc30dc77c4e6d4d90756f8bc3b5cfbc311"
+source = "git+https://github.com/ethcore/ws-rs.git#5b28de58421b017b01f4565b2c35a46679707789"
 dependencies = [
  "httparse 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",

dapps/Cargo.toml

@@ -24,9 +24,9 @@ parity-dapps = { git = "https://github.com/ethcore/parity-dapps-rs.git", version
 # List of apps
 parity-dapps-status = { git = "https://github.com/ethcore/parity-dapps-status-rs.git", version = "0.5.0" }
 parity-dapps-builtins = { git = "https://github.com/ethcore/parity-dapps-builtins-rs.git", version = "0.5.0" }
-parity-dapps-wallet = { git = "https://github.com/ethcore/parity-dapps-wallet-rs.git", version = "0.5.0", optional = true }
+parity-dapps-wallet = { git = "https://github.com/ethcore/parity-dapps-wallet-rs.git", version = "0.6.0", optional = true }
-parity-dapps-dao = { git = "https://github.com/ethcore/parity-dapps-dao-rs.git", version = "0.3.0", optional = true }
+parity-dapps-dao = { git = "https://github.com/ethcore/parity-dapps-dao-rs.git", version = "0.4.0", optional = true }
-parity-dapps-makerotc = { git = "https://github.com/ethcore/parity-dapps-makerotc-rs.git", version = "0.2.0", optional = true }
+parity-dapps-makerotc = { git = "https://github.com/ethcore/parity-dapps-makerotc-rs.git", version = "0.3.0", optional = true }
 mime_guess = { version = "1.6.1" }
 clippy = { version = "0.0.71", optional = true}
 

dapps/src/apps/mod.rs

@@ -47,8 +47,8 @@ pub fn all_endpoints(dapps_path: String) -> Endpoints {
 		PageEndpoint::new_safe_to_embed(parity_dapps_builtins::App::default())
 	));
 	pages.insert("proxy".into(), ProxyPac::boxed());
-	insert::<parity_dapps_status::App>(&mut pages, "status");
 	insert::<parity_dapps_status::App>(&mut pages, "parity");
+	insert::<parity_dapps_status::App>(&mut pages, "status");
 
 	// Optional dapps
 	wallet_page(&mut pages);

ethcore/src/account.rs

@@ -116,7 +116,12 @@ impl Account {
 	/// Get (and cache) the contents of the trie's storage at `key`.
 	pub fn storage_at(&self, db: &AccountDB, key: &H256) -> H256 {
 		self.storage_overlay.borrow_mut().entry(key.clone()).or_insert_with(||{
-			(Filth::Clean, H256::from(SecTrieDB::new(db, &self.storage_root).get(key.bytes()).map_or(U256::zero(), |v| -> U256 {decode(v)})))
+			let db = SecTrieDB::new(db, &self.storage_root)
+				.expect("Account storage_root initially set to zero (valid) and only altered by SecTrieDBMut. \
+				SecTrieDBMut would not set it to an invalid state root. Therefore the root is valid and DB creation \
+				using it will not fail.");
+
+			(Filth::Clean, H256::from(db.get(key.bytes()).map_or(U256::zero(), |v| -> U256 {decode(v)})))
 		}).1.clone()
 	}
 
@@ -204,7 +209,10 @@ impl Account {
 
 	/// Commit the `storage_overlay` to the backing DB and update `storage_root`.
 	pub fn commit_storage(&mut self, db: &mut AccountDBMut) {
-		let mut t = SecTrieDBMut::from_existing(db, &mut self.storage_root);
+		let mut t = SecTrieDBMut::from_existing(db, &mut self.storage_root)
+			.expect("Account storage_root initially set to zero (valid) and only altered by SecTrieDBMut. \
+				SecTrieDBMut would not set it to an invalid state root. Therefore the root is valid and DB creation \
+				using it will not fail.");
 		for (k, &mut (ref mut f, ref mut v)) in self.storage_overlay.borrow_mut().iter_mut() {
 			if f == &Filth::Dirty {
 				// cast key and value to trait type,

ethcore/src/basic_authority.rs

@@ -278,7 +278,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, addr.clone(), 3141562.into(), vec![]);
+		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, addr.clone(), 3141562.into(), vec![]).unwrap();
 		let b = b.close_and_lock();
 		let seal = engine.generate_seal(b.block(), Some(&tap)).unwrap();
 

ethcore/src/block.rs

@@ -38,23 +38,7 @@ pub struct Block {
 
 impl Block {
 	/// Returns true if the given bytes form a valid encoding of a block in RLP.
-	// TODO: implement Decoder for this and have this use that.
 	pub fn is_good(b: &[u8]) -> bool {
-		/*
-		let urlp = UntrustedRlp::new(&b);
-		if !urlp.is_list() || urlp.item_count() != 3 || urlp.size() != b.len() { return false; }
-		if urlp.val_at::<Header>(0).is_err() { return false; }
-
-		if !urlp.at(1).unwrap().is_list() { return false; }
-		if urlp.at(1).unwrap().iter().find(|i| i.as_val::<Transaction>().is_err()).is_some() {
-			return false;
-		}
-
-		if !urlp.at(2).unwrap().is_list() { return false; }
-		if urlp.at(2).unwrap().iter().find(|i| i.as_val::<Header>().is_err()).is_some() {
-			return false;
-		}
-		true*/
 		UntrustedRlp::new(b).as_val::<Block>().is_ok()
 	}
 }
@@ -228,9 +212,20 @@ pub struct SealedBlock {
 impl<'x> OpenBlock<'x> {
 	#[cfg_attr(feature="dev", allow(too_many_arguments))]
 	/// Create a new `OpenBlock` ready for transaction pushing.
-	pub fn new(engine: &'x Engine, vm_factory: &'x EvmFactory, tracing: bool, db: Box<JournalDB>, parent: &Header, last_hashes: LastHashes, author: Address, gas_floor_target: U256, extra_data: Bytes) -> Self {
+	pub fn new(
+		engine: &'x Engine,
+		vm_factory: &'x EvmFactory,
+		tracing: bool,
+		db: Box<JournalDB>,
+		parent: &Header,
+		last_hashes: LastHashes,
+		author: Address,
+		gas_floor_target: U256,
+		extra_data: Bytes
+	) -> Result<Self, Error> {
+		let state = try!(State::from_existing(db, parent.state_root().clone(), engine.account_start_nonce()));
 		let mut r = OpenBlock {
-			block: ExecutedBlock::new(State::from_existing(db, parent.state_root().clone(), engine.account_start_nonce()), tracing),
+			block: ExecutedBlock::new(state, tracing),
 			engine: engine,
 			vm_factory: vm_factory,
 			last_hashes: last_hashes,
@@ -245,7 +240,7 @@ impl<'x> OpenBlock<'x> {
 
 		engine.populate_from_parent(&mut r.block.base.header, parent, gas_floor_target);
 		engine.on_new_block(&mut r.block);
-		r
+		Ok(r)
 	}
 
 	/// Alter the author for the block.
@@ -464,12 +459,12 @@ impl IsBlock for SealedBlock {
 pub fn enact(header: &Header, transactions: &[SignedTransaction], uncles: &[Header], engine: &Engine, tracing: bool, db: Box<JournalDB>, parent: &Header, last_hashes: LastHashes, vm_factory: &EvmFactory) -> Result<LockedBlock, Error> {
 	{
 		if ::log::max_log_level() >= ::log::LogLevel::Trace {
-			let s = State::from_existing(db.boxed_clone(), parent.state_root().clone(), engine.account_start_nonce());
+			let s = try!(State::from_existing(db.boxed_clone(), parent.state_root().clone(), engine.account_start_nonce()));
 			trace!("enact(): root={}, author={}, author_balance={}\n", s.root(), header.author(), s.balance(&header.author()));
 		}
 	}
 
-	let mut b = OpenBlock::new(engine, vm_factory, tracing, db, parent, last_hashes, header.author().clone(), 3141562.into(), header.extra_data().clone());
+	let mut b = try!(OpenBlock::new(engine, vm_factory, tracing, db, parent, last_hashes, header.author().clone(), 3141562.into(), header.extra_data().clone()));
 	b.set_difficulty(*header.difficulty());
 	b.set_gas_limit(*header.gas_limit());
 	b.set_timestamp(header.timestamp());
@@ -514,7 +509,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, Address::zero(), 3141562.into(), vec![]);
+		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, Address::zero(), 3141562.into(), vec![]).unwrap();
 		let b = b.close_and_lock();
 		let _ = b.seal(engine.deref(), vec![]);
 	}
@@ -530,7 +525,8 @@ mod tests {
 		let mut db = db_result.take();
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, vec![genesis_header.hash()], Address::zero(), 3141562.into(), vec![]).close_and_lock().seal(engine.deref(), vec![]).unwrap();
+		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, vec![genesis_header.hash()], Address::zero(), 3141562.into(), vec![]).unwrap()
+			.close_and_lock().seal(engine.deref(), vec![]).unwrap();
 		let orig_bytes = b.rlp_bytes();
 		let orig_db = b.drain();
 
@@ -557,7 +553,7 @@ mod tests {
 		let mut db = db_result.take();
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let vm_factory = Default::default();
-		let mut open_block = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, vec![genesis_header.hash()], Address::zero(), 3141562.into(), vec![]);
+		let mut open_block = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, vec![genesis_header.hash()], Address::zero(), 3141562.into(), vec![]).unwrap();
 		let mut uncle1_header = Header::new();
 		uncle1_header.extra_data = b"uncle1".to_vec();
 		let mut uncle2_header = Header::new();

ethcore/src/client/client.rs

@@ -386,18 +386,14 @@ impl<V> Client<V> where V: Verifier {
 
 			let root = HeaderView::new(&header).state_root();
 
-			// TODO [rob]: refactor State::from_existing so we avoid doing redundant lookups.
+			State::from_existing(db, root, self.engine.account_start_nonce()).ok()
-			if !db.contains(&root) {
-				return None;
-			}
-
-			Some(State::from_existing(db, root, self.engine.account_start_nonce()))
 		})
 	}
 
 	/// Get a copy of the best block's state.
 	pub fn state(&self) -> State {
 		State::from_existing(self.state_db.lock().unwrap().boxed_clone(), HeaderView::new(&self.best_block_header()).state_root(), self.engine.account_start_nonce())
+			.expect("State root of best block header always valid.")
 	}
 
 	/// Get info on the cache.
@@ -479,7 +475,7 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 			// give the sender a sufficient balance
 			state.add_balance(&sender, &(needed_balance - balance));
 		}
-		let options = TransactOptions { tracing: false, vm_tracing: analytics.vm_tracing, check_nonce: false };
+		let options = TransactOptions { tracing: analytics.transaction_tracing, vm_tracing: analytics.vm_tracing, check_nonce: false };
 		let mut ret = Executive::new(&mut state, &env_info, self.engine.deref().deref(), &self.vm_factory).transact(t, options);
 
 		// TODO gav move this into Executive.
@@ -774,7 +770,8 @@ impl<V> MiningBlockChainClient for Client<V> where V: Verifier {
 			author,
 			gas_floor_target,
 			extra_data,
-		);
+		).expect("OpenBlock::new only fails if parent state root invalid. State root of best block's header is never invalid. \
+		         Therefore creating an OpenBlock with the best block's header will not fail.");
 
 		// Add uncles
 		self.chain

ethcore/src/client/mod.rs

@@ -51,6 +51,8 @@ use error::Error as EthError;
 /// Options concerning what analytics we run on the call.
 #[derive(Eq, PartialEq, Default, Clone, Copy, Debug)]
 pub struct CallAnalytics {
+	/// Make a transaction trace.
+	pub transaction_tracing: bool,
 	/// Make a VM trace.
 	pub vm_tracing: bool,
 	/// Make a diff.

ethcore/src/error.rs

@@ -224,6 +224,8 @@ pub enum Error {
 	PowHashInvalid,
 	/// The value of the nonce or mishash is invalid.
 	PowInvalid,
+	/// Error concerning TrieDBs
+	TrieError(TrieError),
 }
 
 impl fmt::Display for Error {
@@ -239,6 +241,7 @@ impl fmt::Display for Error {
 				f.write_fmt(format_args!("Unknown engine name ({})", name)),
 			Error::PowHashInvalid => f.write_str("Invalid or out of date PoW hash."),
 			Error::PowInvalid => f.write_str("Invalid nonce or mishash"),
+			Error::TrieError(ref err) => f.write_fmt(format_args!("{}", err)),
 		}
 	}
 }
@@ -300,6 +303,12 @@ impl From<IoError> for Error {
 	}
 }
 
+impl From<TrieError> for Error {
+	fn from(err: TrieError) -> Error {
+		Error::TrieError(err)
+	}
+}
+
 // TODO: uncomment below once https://github.com/rust-lang/rust/issues/27336 sorted.
 /*#![feature(concat_idents)]
 macro_rules! assimilate {

ethcore/src/ethereum/ethash.rs

@@ -308,7 +308,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, Address::zero(), 3141562.into(), vec![]);
+		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, Address::zero(), 3141562.into(), vec![]).unwrap();
 		let b = b.close();
 		assert_eq!(b.state().balance(&Address::zero()), U256::from_str("4563918244f40000").unwrap());
 	}
@@ -323,7 +323,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let mut b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, Address::zero(), 3141562.into(), vec![]);
+		let mut b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, Address::zero(), 3141562.into(), vec![]).unwrap();
 		let mut uncle = Header::new();
 		let uncle_author = address_from_hex("ef2d6d194084c2de36e0dabfce45d046b37d1106");
 		uncle.author = uncle_author.clone();

ethcore/src/ethereum/mod.rs

@@ -62,7 +62,7 @@ mod tests {
 		let mut db_result = get_temp_journal_db();
 		let mut db = db_result.take();
 		spec.ensure_db_good(db.as_hashdb_mut());
-		let s = State::from_existing(db, genesis_header.state_root.clone(), engine.account_start_nonce());
+		let s = State::from_existing(db, genesis_header.state_root.clone(), engine.account_start_nonce()).unwrap();
 		assert_eq!(s.balance(&address_from_hex("0000000000000000000000000000000000000001")), U256::from(1u64));
 		assert_eq!(s.balance(&address_from_hex("0000000000000000000000000000000000000002")), U256::from(1u64));
 		assert_eq!(s.balance(&address_from_hex("0000000000000000000000000000000000000003")), U256::from(1u64));

ethcore/src/miner/miner.rs

@@ -20,7 +20,7 @@ use std::sync::atomic::AtomicBool;
 use util::*;
 use util::keys::store::{AccountProvider};
 use views::{BlockView, HeaderView};
-use client::{MiningBlockChainClient, Executive, Executed, EnvInfo, TransactOptions, BlockChainClient, BlockID, CallAnalytics};
+use client::{MiningBlockChainClient, Executive, Executed, EnvInfo, TransactOptions, BlockID, CallAnalytics};
 use block::{ClosedBlock, IsBlock};
 use error::*;
 use transaction::SignedTransaction;
@@ -279,7 +279,7 @@ impl MinerService for Miner {
 					// give the sender a sufficient balance
 					state.add_balance(&sender, &(needed_balance - balance));
 				}
-				let options = TransactOptions { tracing: false, vm_tracing: analytics.vm_tracing, check_nonce: false };
+				let options = TransactOptions { tracing: analytics.transaction_tracing, vm_tracing: analytics.vm_tracing, check_nonce: false };
 				let mut ret = Executive::new(&mut state, &env_info, self.engine(), chain.vm_factory()).transact(t, options);
 
 				// TODO gav move this into Executive.

ethcore/src/state.rs

@@ -44,6 +44,9 @@ pub struct State {
 	account_start_nonce: U256,
 }
 
+const SEC_TRIE_DB_UNWRAP_STR: &'static str = "A state can only be created with valid root. Creating a SecTrieDB with a valid root will not fail. \
+			 Therefore creating a SecTrieDB with this state's root will not fail.";
+
 impl State {
 	/// Creates new state with empty state root
 	#[cfg(test)]
@@ -64,18 +67,17 @@ impl State {
 	}
 
 	/// Creates new state with existing state root
-	pub fn from_existing(db: Box<JournalDB>, root: H256, account_start_nonce: U256) -> State {
+	pub fn from_existing(db: Box<JournalDB>, root: H256, account_start_nonce: U256) -> Result<State, TrieError> {
-		{
+		if !db.as_hashdb().contains(&root) {
-			// trie should panic! if root does not exist
+			Err(TrieError::InvalidStateRoot)
-			let _ = SecTrieDB::new(db.as_hashdb(), &root);
+		} else {
-		}
+			Ok(State {
-
-		State {
 				db: db,
 				root: root,
 				cache: RefCell::new(HashMap::new()),
 				snapshots: RefCell::new(Vec::new()),
 				account_start_nonce: account_start_nonce,
+			})
 		}
 	}
 
@@ -154,7 +156,8 @@ impl State {
 
 	/// Determine whether an account exists.
 	pub fn exists(&self, a: &Address) -> bool {
-		self.cache.borrow().get(&a).unwrap_or(&None).is_some() || SecTrieDB::new(self.db.as_hashdb(), &self.root).contains(&a)
+		let db = SecTrieDB::new(self.db.as_hashdb(), &self.root).expect(SEC_TRIE_DB_UNWRAP_STR);
+		self.cache.borrow().get(&a).unwrap_or(&None).is_some() || db.contains(&a)
 	}
 
 	/// Get the balance of account `a`.
@@ -245,7 +248,7 @@ impl State {
 		}
 
 		{
-			let mut trie = SecTrieDBMut::from_existing(db, root);
+			let mut trie = SecTrieDBMut::from_existing(db, root).unwrap();
 			for (address, ref a) in accounts.iter() {
 				match **a {
 					Some(ref account) => trie.insert(address, &account.rlp()),
@@ -287,7 +290,7 @@ impl State {
 	fn query_pod(&mut self, query: &PodState) {
 		for (ref address, ref pod_account) in query.get() {
 			if self.get(address, true).is_some() {
-				for (ref key, _) in &pod_account.storage {
+				for key in pod_account.storage.keys() {
 					self.storage_at(address, key);
 				}
 			}
@@ -308,7 +311,8 @@ impl State {
 	fn get<'a>(&'a self, a: &Address, require_code: bool) -> &'a Option<Account> {
 		let have_key = self.cache.borrow().contains_key(a);
 		if !have_key {
-			self.insert_cache(a, SecTrieDB::new(self.db.as_hashdb(), &self.root).get(&a).map(Account::from_rlp))
+			let db = SecTrieDB::new(self.db.as_hashdb(), &self.root).expect(SEC_TRIE_DB_UNWRAP_STR);
+			self.insert_cache(a, db.get(&a).map(Account::from_rlp))
 		}
 		if require_code {
 			if let Some(ref mut account) = self.cache.borrow_mut().get_mut(a).unwrap().as_mut() {
@@ -328,7 +332,8 @@ impl State {
 	fn require_or_from<'a, F: FnOnce() -> Account, G: FnOnce(&mut Account)>(&self, a: &Address, require_code: bool, default: F, not_default: G) -> &'a mut Account {
 		let have_key = self.cache.borrow().contains_key(a);
 		if !have_key {
-			self.insert_cache(a, SecTrieDB::new(self.db.as_hashdb(), &self.root).get(&a).map(Account::from_rlp))
+			let db = SecTrieDB::new(self.db.as_hashdb(), &self.root).expect(SEC_TRIE_DB_UNWRAP_STR);
+			self.insert_cache(a, db.get(&a).map(Account::from_rlp))
 		} else {
 			self.note_cache(a);
 		}
@@ -1145,7 +1150,7 @@ fn code_from_database() {
 		state.drop()
 	};
 
-	let state = State::from_existing(db, root, U256::from(0u8));
+	let state = State::from_existing(db, root, U256::from(0u8)).unwrap();
 	assert_eq!(state.code(&a), Some([1u8, 2, 3].to_vec()));
 }
 
@@ -1160,7 +1165,7 @@ fn storage_at_from_database() {
 		state.drop()
 	};
 
-	let s = State::from_existing(db, root, U256::from(0u8));
+	let s = State::from_existing(db, root, U256::from(0u8)).unwrap();
 	assert_eq!(s.storage_at(&a, &H256::from(&U256::from(01u64))), H256::from(&U256::from(69u64)));
 }
 
@@ -1177,7 +1182,7 @@ fn get_from_database() {
 		state.drop()
 	};
 
-	let state = State::from_existing(db, root, U256::from(0u8));
+	let state = State::from_existing(db, root, U256::from(0u8)).unwrap();
 	assert_eq!(state.balance(&a), U256::from(69u64));
 	assert_eq!(state.nonce(&a), U256::from(1u64));
 }
@@ -1210,7 +1215,7 @@ fn remove_from_database() {
 	};
 
 	let (root, db) = {
-		let mut state = State::from_existing(db, root, U256::from(0u8));
+		let mut state = State::from_existing(db, root, U256::from(0u8)).unwrap();
 		assert_eq!(state.exists(&a), true);
 		assert_eq!(state.nonce(&a), U256::from(1u64));
 		state.kill_account(&a);
@@ -1220,7 +1225,7 @@ fn remove_from_database() {
 		state.drop()
 	};
 
-	let state = State::from_existing(db, root, U256::from(0u8));
+	let state = State::from_existing(db, root, U256::from(0u8)).unwrap();
 	assert_eq!(state.exists(&a), false);
 	assert_eq!(state.nonce(&a), U256::from(0u64));
 }

parity/cli.rs

@@ -23,9 +23,11 @@ Parity. Ethereum Client.
 
 Usage:
   parity daemon <pid-file> [options]
-  parity account (new | list) [options]
+  parity account (new | list ) [options]
+  parity account import <path>... [options]
   parity import [ <file> ] [options]
   parity export [ <file> ] [options]
+  parity signer new-token [options]
   parity [options]
 
 Protocol Options:
@@ -75,14 +77,14 @@ API and Console Options:
   --jsonrpc-apis APIS      Specify the APIs available through the JSONRPC
                            interface. APIS is a comma-delimited list of API
                            name. Possible name are web3, eth, net, personal,
-                           ethcore, traces.
+                           ethcore, ethcore_set, traces.
-                           [default: web3,eth,net,personal,traces].
+                           [default: web3,eth,net,ethcore,personal,traces].
 
   --ipc-off                Disable JSON-RPC over IPC service.
   --ipc-path PATH          Specify custom path for JSON-RPC over IPC service
                            [default: $HOME/.parity/jsonrpc.ipc].
   --ipc-apis APIS          Specify custom API set available via JSON-RPC over
-                           IPC [default: web3,eth,net,personal,traces].
+                           IPC [default: web3,eth,net,ethcore,personal,traces].
 
   --dapps-off              Disable the Dapps server (e.g. status page).
   --dapps-port PORT        Specify the port portion of the Dapps server
@@ -100,9 +102,11 @@ API and Console Options:
                            [default: $HOME/.parity/dapps]
 
   --signer                 Enable Trusted Signer WebSocket endpoint used by
-                           System UIs.
+                           Signer UIs.
   --signer-port PORT       Specify the port of Trusted Signer server
                            [default: 8180].
+  --signer-path PATH       Specify directory where Signer UIs tokens should
+                           be stored. [default: $HOME/.parity/signer]
 
 Sealing/Mining Options:
   --force-sealing          Force the node to author new blocks as if it were
@@ -205,8 +209,11 @@ pub struct Args {
 	pub cmd_list: bool,
 	pub cmd_export: bool,
 	pub cmd_import: bool,
+	pub cmd_signer: bool,
+	pub cmd_new_token: bool,
 	pub arg_pid_file: String,
 	pub arg_file: Option<String>,
+	pub arg_path: Vec<String>,
 	pub flag_chain: String,
 	pub flag_db_path: String,
 	pub flag_identity: String,
@@ -244,6 +251,7 @@ pub struct Args {
 	pub flag_dapps_path: String,
 	pub flag_signer: bool,
 	pub flag_signer_port: u16,
+	pub flag_signer_path: String,
 	pub flag_force_sealing: bool,
 	pub flag_author: String,
 	pub flag_usd_per_tx: String,

parity/configuration.rs

@@ -41,6 +41,7 @@ pub struct Directories {
 	pub keys: String,
 	pub db: String,
 	pub dapps: String,
+	pub signer: String,
 }
 
 impl Configuration {
@@ -285,8 +286,10 @@ impl Configuration {
 		cors.map_or_else(Vec::new, |c| c.split(',').map(|s| s.to_owned()).collect())
 	}
 
-	fn geth_ipc_path() -> String {
+	fn geth_ipc_path(&self) -> String {
-		path::ethereum::with_default("geth.ipc").to_str().unwrap().to_owned()
+		if self.args.flag_testnet { path::ethereum::with_testnet("geth.ipc") }
+		else { path::ethereum::with_default("geth.ipc") }
+			.to_str().unwrap().to_owned()
 	}
 
 	pub fn keys_iterations(&self) -> u32 {
@@ -329,11 +332,15 @@ impl Configuration {
 		::std::fs::create_dir_all(&keys_path).unwrap_or_else(|e| die_with_io_error("main", e));
 		let dapps_path = Configuration::replace_home(&self.args.flag_dapps_path);
 		::std::fs::create_dir_all(&dapps_path).unwrap_or_else(|e| die_with_io_error("main", e));
+		let signer_path = Configuration::replace_home(&self.args.flag_signer_path);
+		::std::fs::create_dir_all(&signer_path).unwrap_or_else(|e| die_with_io_error("main", e));
+
 
 		Directories {
 			keys: keys_path,
 			db: db_path,
 			dapps: dapps_path,
+			signer: signer_path,
 		}
 	}
 
@@ -350,7 +357,7 @@ impl Configuration {
 	}
 
 	fn ipc_path(&self) -> String {
-		if self.args.flag_geth { Self::geth_ipc_path() }
+		if self.args.flag_geth { self.geth_ipc_path() }
 		else { Configuration::replace_home(&self.args.flag_ipcpath.clone().unwrap_or(self.args.flag_ipc_path.clone())) }
 	}
 }

parity/main.rs

@@ -93,7 +93,7 @@ use informant::Informant;
 use die::*;
 use cli::print_version;
 use rpc::RpcServer;
-use signer::SignerServer;
+use signer::{SignerServer, new_token};
 use dapps::WebappServer;
 use io_handler::ClientIoHandler;
 use configuration::Configuration;
@@ -137,6 +137,11 @@ fn execute(conf: Configuration) {
 		return;
 	}
 
+	if conf.args.cmd_signer {
+		execute_signer(conf);
+		return;
+	}
+
 	execute_client(conf, spec, client_config);
 }
 
@@ -241,6 +246,7 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 	let signer_server = signer::start(signer::Configuration {
 		enabled: deps_for_rpc_apis.signer_enabled,
 		port: conf.args.flag_signer_port,
+		signer_path: conf.directories().signer,
 	}, signer::Dependencies {
 		panic_handler: panic_handler.clone(),
 		apis: deps_for_rpc_apis.clone(),
@@ -439,6 +445,17 @@ fn execute_import(conf: Configuration) {
 	client.flush_queue();
 }
 
+fn execute_signer(conf: Configuration) {
+	if !conf.args.cmd_new_token {
+		die!("Unknown command.");
+	}
+
+	let path = conf.directories().signer;
+	new_token(path).unwrap_or_else(|e| {
+		die!("Error generating token: {:?}", e)
+	});
+}
+
 fn execute_account_cli(conf: Configuration) {
 	use util::keys::store::SecretStore;
 	use rpassword::read_password;
@@ -465,6 +482,11 @@ fn execute_account_cli(conf: Configuration) {
 		for &(addr, _) in &secret_store.accounts().unwrap() {
 			println!("{:?}", addr);
 		}
+		return;
+	}
+	if conf.args.cmd_import {
+		let imported = util::keys::import_keys_paths(&mut secret_store, &conf.args.arg_path).unwrap();
+		println!("Imported {} keys", imported);
 	}
 }
 

parity/rpc_apis.rs

@@ -40,7 +40,9 @@ pub enum Api {
 	Net,
 	Eth,
 	Personal,
+	Signer,
 	Ethcore,
+	EthcoreSet,
 	Traces,
 	Rpc,
 }
@@ -66,7 +68,9 @@ impl FromStr for Api {
 			"net" => Ok(Net),
 			"eth" => Ok(Eth),
 			"personal" => Ok(Personal),
+			"signer" => Ok(Signer),
 			"ethcore" => Ok(Ethcore),
+			"ethcore_set" => Ok(EthcoreSet),
 			"traces" => Ok(Traces),
 			"rpc" => Ok(Rpc),
 			e => Err(ApiError::UnknownApi(e.into())),
@@ -94,7 +98,9 @@ fn to_modules(apis: &[Api]) -> BTreeMap<String, String> {
 			Api::Net => ("net", "1.0"),
 			Api::Eth => ("eth", "1.0"),
 			Api::Personal => ("personal", "1.0"),
+			Api::Signer => ("signer", "1.0"),
 			Api::Ethcore => ("ethcore", "1.0"),
+			Api::EthcoreSet => ("ethcore_set", "1.0"),
 			Api::Traces => ("traces", "1.0"),
 			Api::Rpc => ("rpc", "1.0"),
 		};
@@ -112,22 +118,22 @@ pub fn from_str(apis: Vec<&str>) -> Vec<Api> {
 		})
 }
 
-fn list_apis(apis: ApiSet, signer_enabled: bool) -> Vec<Api> {
+fn list_apis(apis: ApiSet) -> Vec<Api> {
 	match apis {
 		ApiSet::List(apis) => apis,
-		ApiSet::UnsafeContext if signer_enabled => {
+		ApiSet::UnsafeContext => {
-			vec![Api::Web3, Api::Net, Api::Eth, Api::Ethcore, Api::Traces, Api::Rpc]
+			vec![Api::Web3, Api::Net, Api::Eth, Api::Personal, Api::Ethcore, Api::EthcoreSet, Api::Traces, Api::Rpc]
-		}
+		},
 		_ => {
-			vec![Api::Web3, Api::Net, Api::Eth, Api::Personal, Api::Ethcore, Api::Traces, Api::Rpc]
+			vec![Api::Web3, Api::Net, Api::Eth, Api::Personal, Api::Signer, Api::Ethcore, Api::EthcoreSet, Api::Traces, Api::Rpc]
-		}
+		},
 	}
 }
 
 pub fn setup_rpc<T: Extendable>(server: T, deps: Arc<Dependencies>, apis: ApiSet) -> T {
 	use ethcore_rpc::v1::*;
 
-	let apis = list_apis(apis, deps.signer_enabled);
+	let apis = list_apis(apis);
 	for api in &apis {
 		match *api {
 			Api::Web3 => {
@@ -147,14 +153,17 @@ pub fn setup_rpc<T: Extendable>(server: T, deps: Arc<Dependencies>, apis: ApiSet
 				}
 			},
 			Api::Personal => {
-				server.add_delegate(PersonalClient::new(&deps.secret_store, &deps.client, &deps.miner).to_delegate());
+				server.add_delegate(PersonalClient::new(&deps.secret_store, &deps.client, &deps.miner, deps.signer_enabled).to_delegate());
-				if deps.signer_enabled {
+			},
+			Api::Signer => {
 				server.add_delegate(SignerClient::new(&deps.secret_store, &deps.client, &deps.miner, &deps.signer_queue).to_delegate());
-				}
 			},
 			Api::Ethcore => {
 				server.add_delegate(EthcoreClient::new(&deps.miner, deps.logger.clone(), deps.settings.clone()).to_delegate())
 			},
+			Api::EthcoreSet => {
+				server.add_delegate(EthcoreSetClient::new(&deps.miner).to_delegate())
+			},
 			Api::Traces => {
 				server.add_delegate(TracesClient::new(&deps.client, &deps.miner).to_delegate())
 			},

parity/signer.rs

@@ -14,21 +14,28 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+use std::io;
+use std::path::PathBuf;
 use std::sync::Arc;
 use util::panics::{PanicHandler, ForwardPanic};
+use util::keys::directory::restrict_permissions_owner;
 use die::*;
 use rpc_apis;
 
+const CODES_FILENAME: &'static str = "authcodes";
+
 #[cfg(feature = "ethcore-signer")]
 use ethcore_signer as signer;
 #[cfg(feature = "ethcore-signer")]
 pub use ethcore_signer::Server as SignerServer;
+
 #[cfg(not(feature = "ethcore-signer"))]
 pub struct SignerServer;
 
 pub struct Configuration {
 	pub enabled: bool,
 	pub port: u16,
+	pub signer_path: String,
 }
 
 pub struct Dependencies {
@@ -44,6 +51,25 @@ pub fn start(conf: Configuration, deps: Dependencies) -> Option<SignerServer> {
 	}
 }
 
+fn codes_path(path: String) -> PathBuf {
+	let mut p = PathBuf::from(path);
+	p.push(CODES_FILENAME);
+	let _ = restrict_permissions_owner(&p);
+	p
+}
+
+
+#[cfg(feature = "ethcore-signer")]
+pub fn new_token(path: String) -> io::Result<()> {
+	let path = codes_path(path);
+	let mut codes = try!(signer::AuthCodes::from_file(&path));
+	let code = try!(codes.generate_new());
+	try!(codes.to_file(&path));
+	println!("New token has been generated. Copy the code below to your Signer UI:");
+	println!("{}", code);
+	Ok(())
+}
+
 #[cfg(feature = "ethcore-signer")]
 fn do_start(conf: Configuration, deps: Dependencies) -> SignerServer {
 	let addr = format!("127.0.0.1:{}", conf.port).parse().unwrap_or_else(|_| {
@@ -51,7 +77,10 @@ fn do_start(conf: Configuration, deps: Dependencies) -> SignerServer {
 	});
 
 	let start_result = {
-		let server = signer::ServerBuilder::new(deps.apis.signer_queue.clone());
+		let server = signer::ServerBuilder::new(
+			deps.apis.signer_queue.clone(),
+			codes_path(conf.signer_path),
+		);
 		let server = rpc_apis::setup_rpc(server, deps.apis, rpc_apis::ApiSet::SafeContext);
 		server.start(addr)
 	};
@@ -67,8 +96,12 @@ fn do_start(conf: Configuration, deps: Dependencies) -> SignerServer {
 }
 
 #[cfg(not(feature = "ethcore-signer"))]
-fn do_start(conf: Configuration) -> ! {
+fn do_start(_conf: Configuration) -> ! {
 	die!("Your Parity version has been compiled without Trusted Signer support.")
 }
 
+#[cfg(not(feature = "ethcore-signer"))]
+pub fn new_token(_path: String) -> ! {
+	die!("Your Parity version has been compiled without Trusted Signer support.")
+}
 

rpc/src/v1/impls/ethcore.rs

@@ -15,7 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 //! Ethcore-specific rpc implementation.
-use util::{U256, Address, RotatingLogger, FixedHash};
+use util::RotatingLogger;
 use util::network_settings::NetworkSettings;
 use util::misc::version_data;
 use std::sync::{Arc, Weak};
@@ -23,7 +23,6 @@ use std::ops::Deref;
 use std::collections::BTreeMap;
 use jsonrpc_core::*;
 use ethcore::miner::MinerService;
-use ethcore::client::{BlockChainClient};
 use v1::traits::Ethcore;
 use v1::types::{Bytes};
 
@@ -49,41 +48,6 @@ impl<M> EthcoreClient<M> where M: MinerService {
 
 impl<M> Ethcore for EthcoreClient<M> where M: MinerService + 'static {
 
-	fn set_min_gas_price(&self, params: Params) -> Result<Value, Error> {
-		from_params::<(U256,)>(params).and_then(|(gas_price,)| {
-			take_weak!(self.miner).set_minimal_gas_price(gas_price);
-			to_value(&true)
-		})
-	}
-
-	fn set_gas_floor_target(&self, params: Params) -> Result<Value, Error> {
-		from_params::<(U256,)>(params).and_then(|(gas_floor_target,)| {
-			take_weak!(self.miner).set_gas_floor_target(gas_floor_target);
-			to_value(&true)
-		})
-	}
-
-	fn set_extra_data(&self, params: Params) -> Result<Value, Error> {
-		from_params::<(Bytes,)>(params).and_then(|(extra_data,)| {
-			take_weak!(self.miner).set_extra_data(extra_data.to_vec());
-			to_value(&true)
-		})
-	}
-
-	fn set_author(&self, params: Params) -> Result<Value, Error> {
-		from_params::<(Address,)>(params).and_then(|(author,)| {
-			take_weak!(self.miner).set_author(author);
-			to_value(&true)
-		})
-	}
-
-	fn set_transactions_limit(&self, params: Params) -> Result<Value, Error> {
-		from_params::<(usize,)>(params).and_then(|(limit,)| {
-			take_weak!(self.miner).set_transactions_limit(limit);
-			to_value(&true)
-		})
-	}
-
 	fn transactions_limit(&self, _: Params) -> Result<Value, Error> {
 		to_value(&take_weak!(self.miner).transactions_limit())
 	}

rpc/src/v1/impls/ethcore_set.rs

@@ -0,0 +1,78 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+/// Ethcore-specific rpc interface for operations altering the settings.
+use util::{U256, Address};
+use std::sync::{Arc, Weak};
+use jsonrpc_core::*;
+use ethcore::miner::MinerService;
+use v1::traits::EthcoreSet;
+use v1::types::{Bytes};
+
+/// Ethcore-specific rpc interface for operations altering the settings.
+pub struct EthcoreSetClient<M> where
+	M: MinerService {
+
+	miner: Weak<M>,
+}
+
+impl<M> EthcoreSetClient<M> where M: MinerService {
+	/// Creates new `EthcoreSetClient`.
+	pub fn new(miner: &Arc<M>) -> Self {
+		EthcoreSetClient {
+			miner: Arc::downgrade(miner),
+		}
+	}
+}
+
+impl<M> EthcoreSet for EthcoreSetClient<M> where M: MinerService + 'static {
+
+	fn set_min_gas_price(&self, params: Params) -> Result<Value, Error> {
+		from_params::<(U256,)>(params).and_then(|(gas_price,)| {
+			take_weak!(self.miner).set_minimal_gas_price(gas_price);
+			to_value(&true)
+		})
+	}
+
+	fn set_gas_floor_target(&self, params: Params) -> Result<Value, Error> {
+		from_params::<(U256,)>(params).and_then(|(gas_floor_target,)| {
+			take_weak!(self.miner).set_gas_floor_target(gas_floor_target);
+			to_value(&true)
+		})
+	}
+
+	fn set_extra_data(&self, params: Params) -> Result<Value, Error> {
+		from_params::<(Bytes,)>(params).and_then(|(extra_data,)| {
+			take_weak!(self.miner).set_extra_data(extra_data.to_vec());
+			to_value(&true)
+		})
+	}
+
+	fn set_author(&self, params: Params) -> Result<Value, Error> {
+		from_params::<(Address,)>(params).and_then(|(author,)| {
+			take_weak!(self.miner).set_author(author);
+			to_value(&true)
+		})
+	}
+
+	fn set_transactions_limit(&self, params: Params) -> Result<Value, Error> {
+		from_params::<(usize,)>(params).and_then(|(limit,)| {
+			take_weak!(self.miner).set_transactions_limit(limit);
+			to_value(&true)
+		})
+	}
+
+}

rpc/src/v1/impls/mod.rs

@@ -37,6 +37,7 @@ mod net;
 mod personal;
 mod personal_signer;
 mod ethcore;
+mod ethcore_set;
 mod traces;
 mod rpc;
 
@@ -48,6 +49,7 @@ pub use self::net::NetClient;
 pub use self::personal::PersonalClient;
 pub use self::personal_signer::SignerClient;
 pub use self::ethcore::EthcoreClient;
+pub use self::ethcore_set::EthcoreSetClient;
 pub use self::traces::TracesClient;
 pub use self::rpc::RpcClient;
 

rpc/src/v1/impls/personal.rs

@@ -31,22 +31,29 @@ pub struct PersonalClient<A, C, M>
 	accounts: Weak<A>,
 	client: Weak<C>,
 	miner: Weak<M>,
+	signer_enabled: bool,
 }
 
 impl<A, C, M> PersonalClient<A, C, M>
 	where A: AccountProvider, C: MiningBlockChainClient, M: MinerService {
 	/// Creates new PersonalClient
-	pub fn new(store: &Arc<A>, client: &Arc<C>, miner: &Arc<M>) -> Self {
+	pub fn new(store: &Arc<A>, client: &Arc<C>, miner: &Arc<M>, signer_enabled: bool) -> Self {
 		PersonalClient {
 			accounts: Arc::downgrade(store),
 			client: Arc::downgrade(client),
 			miner: Arc::downgrade(miner),
+			signer_enabled: signer_enabled,
 		}
 	}
 }
 
 impl<A: 'static, C: 'static, M: 'static> Personal for PersonalClient<A, C, M>
 	where A: AccountProvider, C: MiningBlockChainClient, M: MinerService {
+
+	fn signer_enabled(&self, _: Params) -> Result<Value, Error> {
+		to_value(&self.signer_enabled)
+	}
+
 	fn accounts(&self, _: Params) -> Result<Value, Error> {
 		let store = take_weak!(self.accounts);
 		match store.accounts() {

rpc/src/v1/impls/personal_signer.rs

@@ -81,8 +81,7 @@ impl<A: 'static, C: 'static, M: 'static> PersonalSigner for SignerClient<A, C, M
 						}
 					})
 					.unwrap_or_else(|| {
-						queue.request_rejected(id);
+						to_value(&false)
-						to_value(&H256::zero())
 					})
 			}
 		)

rpc/src/v1/impls/traces.rs

@@ -19,16 +19,12 @@
 use std::sync::{Weak, Arc};
 use jsonrpc_core::*;
 use std::collections::BTreeMap;
-use util::{H256, U256, FixedHash, Uint};
+use util::H256;
-use serde;
 use ethcore::client::{BlockChainClient, CallAnalytics, TransactionID, TraceId};
-use ethcore::trace::VMTrace;
 use ethcore::miner::MinerService;
-use ethcore::state_diff::StateDiff;
-use ethcore::account_diff::{Diff, Existance};
 use ethcore::transaction::{Transaction as EthTransaction, SignedTransaction, Action};
 use v1::traits::Traces;
-use v1::types::{TraceFilter, Trace, BlockNumber, Index, CallRequest};
+use v1::types::{TraceFilter, LocalizedTrace, Trace, BlockNumber, Index, CallRequest, Bytes, StateDiff, VMTrace};
 
 /// Traces api implementation.
 pub struct TracesClient<C, M> where C: BlockChainClient, M: MinerService {
@@ -61,102 +57,13 @@ impl<C, M> TracesClient<C, M> where C: BlockChainClient, M: MinerService {
 	}
 }
 
-fn vm_trace_to_object(t: &VMTrace) -> Value {
-	let mut ret = BTreeMap::new();
-	ret.insert("code".to_owned(), to_value(&t.code).unwrap());
-
-	let mut subs = t.subs.iter();
-	let mut next_sub = subs.next();
-
-	let ops = t.operations
-		.iter()
-		.enumerate()
-		.map(|(i, op)| {
-			let mut m = map![
-				"pc".to_owned() => to_value(&op.pc).unwrap(),
-				"cost".to_owned() => match op.gas_cost <= U256::from(!0u64) {
-					true => to_value(&op.gas_cost.low_u64()),
-					false => to_value(&op.gas_cost),
-				}.unwrap()
-			];
-			if let Some(ref ex) = op.executed {
-				let mut em = map![
-					"used".to_owned() => to_value(&ex.gas_used.low_u64()).unwrap(),
-					"push".to_owned() => to_value(&ex.stack_push).unwrap()
-				];
-				if let Some(ref md) = ex.mem_diff {
-					em.insert("mem".to_owned(), Value::Object(map![
-						"off".to_owned() => to_value(&md.offset).unwrap(),
-						"data".to_owned() => to_value(&md.data).unwrap()
-					]));
-				}
-				if let Some(ref sd) = ex.store_diff {
-					em.insert("store".to_owned(), Value::Object(map![
-						"key".to_owned() => to_value(&sd.location).unwrap(),
-						"val".to_owned() => to_value(&sd.value).unwrap()
-					]));
-				}
-				m.insert("ex".to_owned(), Value::Object(em));
-			}
-			if next_sub.is_some() && next_sub.unwrap().parent_step == i {
-				m.insert("sub".to_owned(), vm_trace_to_object(next_sub.unwrap()));
-				next_sub = subs.next();
-			}
-			Value::Object(m)
-		})
-		.collect::<Vec<_>>();
-	ret.insert("ops".to_owned(), Value::Array(ops));
-	Value::Object(ret)
-}
-
-fn diff_to_object<T>(d: &Diff<T>) -> Value where T: serde::Serialize + Eq {
-	let mut ret = BTreeMap::new();
-	match *d {
-		Diff::Same => {
-			ret.insert("diff".to_owned(), Value::String("=".to_owned()));
-		}
-		Diff::Born(ref x) => {
-			ret.insert("diff".to_owned(), Value::String("+".to_owned()));
-			ret.insert("+".to_owned(), to_value(x).unwrap());
-		}
-		Diff::Died(ref x) => {
-			ret.insert("diff".to_owned(), Value::String("-".to_owned()));
-			ret.insert("-".to_owned(), to_value(x).unwrap());
-		}
-		Diff::Changed(ref from, ref to) => {
-			ret.insert("diff".to_owned(), Value::String("*".to_owned()));
-			ret.insert("-".to_owned(), to_value(from).unwrap());
-			ret.insert("+".to_owned(), to_value(to).unwrap());
-		}
-	};
-	Value::Object(ret)
-}
-
-fn state_diff_to_object(t: &StateDiff) -> Value {
-	Value::Object(t.iter().map(|(address, account)| {
-		(address.hex(), Value::Object(map![
-			"existance".to_owned() => Value::String(match account.existance() {
-				Existance::Born => "+",
-				Existance::Alive => ".",
-				Existance::Died => "-",
-			}.to_owned()),
-			"balance".to_owned() => diff_to_object(&account.balance),
-			"nonce".to_owned() => diff_to_object(&account.nonce),
-			"code".to_owned() => diff_to_object(&account.code),
-			"storage".to_owned() => Value::Object(account.storage.iter().map(|(key, val)| {
-				(key.hex(), diff_to_object(&val))
-			}).collect::<BTreeMap<_, _>>())
-		]))
-	}).collect::<BTreeMap<_, _>>())
-}
-
 impl<C, M> Traces for TracesClient<C, M> where C: BlockChainClient + 'static, M: MinerService + 'static {
 	fn filter(&self, params: Params) -> Result<Value, Error> {
 		from_params::<(TraceFilter,)>(params)
 			.and_then(|(filter, )| {
 				let client = take_weak!(self.client);
 				let traces = client.filter_traces(filter.into());
-				let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(Trace::from).collect());
+				let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(LocalizedTrace::from).collect());
 				to_value(&traces)
 			})
 	}
@@ -166,7 +73,7 @@ impl<C, M> Traces for TracesClient<C, M> where C: BlockChainClient + 'static, M:
 			.and_then(|(block_number,)| {
 				let client = take_weak!(self.client);
 				let traces = client.block_traces(block_number.into());
-				let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(Trace::from).collect());
+				let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(LocalizedTrace::from).collect());
 				to_value(&traces)
 			})
 	}
@@ -176,7 +83,7 @@ impl<C, M> Traces for TracesClient<C, M> where C: BlockChainClient + 'static, M:
 			.and_then(|(transaction_hash,)| {
 				let client = take_weak!(self.client);
 				let traces = client.transaction_traces(TransactionID::Hash(transaction_hash));
-				let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(Trace::from).collect());
+				let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(LocalizedTrace::from).collect());
 				to_value(&traces)
 			})
 	}
@@ -190,36 +97,36 @@ impl<C, M> Traces for TracesClient<C, M> where C: BlockChainClient + 'static, M:
 					address: address.into_iter().map(|i| i.value()).collect()
 				};
 				let trace = client.trace(id);
-				let trace = trace.map(Trace::from);
+				let trace = trace.map(LocalizedTrace::from);
 				to_value(&trace)
 			})
 	}
 
-	fn vm_trace_call(&self, params: Params) -> Result<Value, Error> {
+	fn call(&self, params: Params) -> Result<Value, Error> {
-		trace!(target: "jsonrpc", "vm_trace_call: {:?}", params);
+		trace!(target: "jsonrpc", "call: {:?}", params);
 		from_params(params)
-			.and_then(|(request,)| {
+			.and_then(|(request, flags)| {
+				let flags: Vec<String> = flags;
+				let analytics = CallAnalytics {
+					transaction_tracing: flags.contains(&("trace".to_owned())),
+					vm_tracing: flags.contains(&("vmTrace".to_owned())),
+					state_diffing: flags.contains(&("stateDiff".to_owned())),
+				};
 				let signed = try!(self.sign_call(request));
-				let r = take_weak!(self.client).call(&signed, CallAnalytics{ vm_tracing: true, state_diffing: false });
+				let r = take_weak!(self.client).call(&signed, analytics);
 				if let Ok(executed) = r {
+					// TODO maybe add other stuff to this?
+					let mut ret = map!["output".to_owned() => to_value(&Bytes(executed.output)).unwrap()];
+					if let Some(trace) = executed.trace {
+						ret.insert("trace".to_owned(), to_value(&Trace::from(trace)).unwrap());
+					}
 					if let Some(vm_trace) = executed.vm_trace {
-						return Ok(vm_trace_to_object(&vm_trace));
+						ret.insert("vmTrace".to_owned(), to_value(&VMTrace::from(vm_trace)).unwrap());
 					}
-				}
-				Ok(Value::Null)
-			})
-	}
-
-	fn state_diff_call(&self, params: Params) -> Result<Value, Error> {
-		trace!(target: "jsonrpc", "state_diff_call: {:?}", params);
-		from_params(params)
-			.and_then(|(request,)| {
-				let signed = try!(self.sign_call(request));
-				let r = take_weak!(self.client).call(&signed, CallAnalytics{ vm_tracing: false, state_diffing: true });
-				if let Ok(executed) = r {
 					if let Some(state_diff) = executed.state_diff {
-						return Ok(state_diff_to_object(&state_diff));
+						ret.insert("stateDiff".to_owned(), to_value(&StateDiff::from(state_diff)).unwrap());
 					}
+					return Ok(Value::Object(ret))
 				}
 				Ok(Value::Null)
 			})

rpc/src/v1/mod.rs

@@ -25,6 +25,6 @@ pub mod traits;
 pub mod tests;
 pub mod types;
 
-pub use self::traits::{Web3, Eth, EthFilter, EthSigning, Personal, PersonalSigner, Net, Ethcore, Traces, Rpc};
+pub use self::traits::{Web3, Eth, EthFilter, EthSigning, Personal, PersonalSigner, Net, Ethcore, EthcoreSet, Traces, Rpc};
 pub use self::impls::*;
 pub use self::helpers::{SigningQueue, ConfirmationsQueue};

rpc/src/v1/tests/mocked/ethcore.rs

@@ -17,7 +17,7 @@
 use std::sync::Arc;
 use std::str::FromStr;
 use jsonrpc_core::IoHandler;
-use v1::{Ethcore, EthcoreClient};
+use v1::{Ethcore, EthcoreClient, EthcoreSet, EthcoreSetClient};
 use ethcore::miner::MinerService;
 use v1::tests::helpers::TestMinerService;
 use util::numbers::*;
@@ -49,12 +49,16 @@ fn ethcore_client(miner: &Arc<TestMinerService>) -> EthcoreClient<TestMinerServi
 	EthcoreClient::new(&miner, logger(), settings())
 }
 
+fn ethcore_set_client(miner: &Arc<TestMinerService>) -> EthcoreSetClient<TestMinerService> {
+	EthcoreSetClient::new(&miner)
+}
+
 #[test]
 fn rpc_ethcore_extra_data() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_extraData", "params": [], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"0x01020304","id":1}"#;
@@ -68,9 +72,9 @@ fn rpc_ethcore_default_extra_data() {
 	use util::ToPretty;
 
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_defaultExtraData", "params": [], "id": 1}"#;
 	let response = format!(r#"{{"jsonrpc":"2.0","result":"0x{}","id":1}}"#, misc::version_data().to_hex());
@@ -81,9 +85,9 @@ fn rpc_ethcore_default_extra_data() {
 #[test]
 fn rpc_ethcore_gas_floor_target() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_gasFloorTarget", "params": [], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"0x3039","id":1}"#;
@@ -94,9 +98,9 @@ fn rpc_ethcore_gas_floor_target() {
 #[test]
 fn rpc_ethcore_min_gas_price() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_minGasPrice", "params": [], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"0x01312d00","id":1}"#;
@@ -107,9 +111,9 @@ fn rpc_ethcore_min_gas_price() {
 #[test]
 fn rpc_ethcore_set_min_gas_price() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setMinGasPrice", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
@@ -121,9 +125,9 @@ fn rpc_ethcore_set_min_gas_price() {
 #[test]
 fn rpc_ethcore_set_gas_floor_target() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setGasFloorTarget", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
@@ -135,9 +139,9 @@ fn rpc_ethcore_set_gas_floor_target() {
 #[test]
 fn rpc_ethcore_set_extra_data() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setExtraData", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
@@ -149,9 +153,9 @@ fn rpc_ethcore_set_extra_data() {
 #[test]
 fn rpc_ethcore_set_author() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setAuthor", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
@@ -169,6 +173,7 @@ fn rpc_ethcore_dev_logs() {
 	let ethcore = EthcoreClient::new(&miner, logger.clone(), settings()).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_devLogs", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":["b","a"],"id":1}"#;
@@ -179,9 +184,9 @@ fn rpc_ethcore_dev_logs() {
 #[test]
 fn rpc_ethcore_dev_logs_levels() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_devLogsLevels", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"rpc=trace","id":1}"#;
@@ -191,9 +196,9 @@ fn rpc_ethcore_dev_logs_levels() {
 #[test]
 fn rpc_ethcore_set_transactions_limit() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setTransactionsLimit", "params":[10240240], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
@@ -205,9 +210,9 @@ fn rpc_ethcore_set_transactions_limit() {
 #[test]
 fn rpc_ethcore_transactions_limit() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_transactionsLimit", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":1024,"id":1}"#;
@@ -218,9 +223,9 @@ fn rpc_ethcore_transactions_limit() {
 #[test]
 fn rpc_ethcore_net_chain() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_netChain", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"testchain","id":1}"#;
@@ -231,9 +236,9 @@ fn rpc_ethcore_net_chain() {
 #[test]
 fn rpc_ethcore_net_max_peers() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_netMaxPeers", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":25,"id":1}"#;
@@ -244,9 +249,9 @@ fn rpc_ethcore_net_max_peers() {
 #[test]
 fn rpc_ethcore_net_port() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_netPort", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":30303,"id":1}"#;
@@ -257,9 +262,9 @@ fn rpc_ethcore_net_port() {
 #[test]
 fn rpc_ethcore_rpc_settings() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_rpcSettings", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":{"enabled":true,"interface":"all","port":8545},"id":1}"#;
@@ -270,9 +275,9 @@ fn rpc_ethcore_rpc_settings() {
 #[test]
 fn rpc_ethcore_node_name() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
 	let io = IoHandler::new();
-	io.add_delegate(ethcore);
+	io.add_delegate(ethcore_client(&miner).to_delegate());
+	io.add_delegate(ethcore_set_client(&miner).to_delegate());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_nodeName", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"mynode","id":1}"#;

rpc/src/v1/tests/mocked/personal.rs

@@ -53,7 +53,7 @@ fn setup() -> PersonalTester {
 	let accounts = accounts_provider();
 	let client = blockchain_client();
 	let miner = miner_service();
-	let personal = PersonalClient::new(&accounts, &client, &miner);
+	let personal = PersonalClient::new(&accounts, &client, &miner, false);
 
 	let io = IoHandler::new();
 	io.add_delegate(personal.to_delegate());
@@ -68,6 +68,20 @@ fn setup() -> PersonalTester {
 	tester
 }
 
+#[test]
+fn should_return_false_if_signer_is_disabled() {
+	// given
+	let tester = setup();
+
+	// when
+	let request = r#"{"jsonrpc": "2.0", "method": "personal_signerEnabled", "params": [], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":false,"id":1}"#;
+
+
+	// then
+	assert_eq!(tester.io.handle_request(request), Some(response.to_owned()));
+}
+
 #[test]
 fn accounts() {
 	let tester = setup();

rpc/src/v1/tests/mocked/personal_signer.rs

@@ -120,6 +120,30 @@ fn should_reject_transaction_from_queue_without_dispatching() {
 	assert_eq!(tester.miner.imported_transactions.lock().unwrap().len(), 0);
 }
 
+#[test]
+fn should_not_remove_transaction_if_password_is_invalid() {
+	// given
+	let tester = signer_tester();
+	tester.queue.add_request(TransactionRequest {
+		from: Address::from(1),
+		to: Some(Address::from_str("d46e8dd67c5d32be8058bb8eb970870f07244567").unwrap()),
+		gas_price: Some(U256::from(10_000)),
+		gas: Some(U256::from(10_000_000)),
+		value: Some(U256::from(1)),
+		data: None,
+		nonce: None,
+	});
+	assert_eq!(tester.queue.requests().len(), 1);
+
+	// when
+	let request = r#"{"jsonrpc":"2.0","method":"personal_confirmTransaction","params":["0x01",{},"xxx"],"id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":false,"id":1}"#;
+
+	// then
+	assert_eq!(tester.io.handle_request(&request), Some(response.to_owned()));
+	assert_eq!(tester.queue.requests().len(), 1);
+}
+
 #[test]
 fn should_confirm_transaction_and_dispatch() {
 	// given

rpc/src/v1/traits/ethcore.rs

@@ -21,21 +21,6 @@ use jsonrpc_core::*;
 /// Ethcore-specific rpc interface.
 pub trait Ethcore: Sized + Send + Sync + 'static {
 
-	/// Sets new minimal gas price for mined blocks.
-	fn set_min_gas_price(&self, _: Params) -> Result<Value, Error>;
-
-	/// Sets new gas floor target for mined blocks.
-	fn set_gas_floor_target(&self, _: Params) -> Result<Value, Error>;
-
-	/// Sets new extra data for mined blocks.
-	fn set_extra_data(&self, _: Params) -> Result<Value, Error>;
-
-	/// Sets new author for mined block.
-	fn set_author(&self, _: Params) -> Result<Value, Error>;
-
-	/// Sets the limits for transaction queue.
-	fn set_transactions_limit(&self, _: Params) -> Result<Value, Error>;
-
 	/// Returns current transactions limit.
 	fn transactions_limit(&self, _: Params) -> Result<Value, Error>;
 
@@ -75,11 +60,6 @@ pub trait Ethcore: Sized + Send + Sync + 'static {
 	/// Should be used to convert object to io delegate.
 	fn to_delegate(self) -> IoDelegate<Self> {
 		let mut delegate = IoDelegate::new(Arc::new(self));
-		delegate.add_method("ethcore_setMinGasPrice", Ethcore::set_min_gas_price);
-		delegate.add_method("ethcore_setGasFloorTarget", Ethcore::set_gas_floor_target);
-		delegate.add_method("ethcore_setExtraData", Ethcore::set_extra_data);
-		delegate.add_method("ethcore_setAuthor", Ethcore::set_author);
-		delegate.add_method("ethcore_setTransactionsLimit", Ethcore::set_transactions_limit);
 
 		delegate.add_method("ethcore_extraData", Ethcore::extra_data);
 		delegate.add_method("ethcore_gasFloorTarget", Ethcore::gas_floor_target);

rpc/src/v1/traits/ethcore_set.rs

@@ -0,0 +1,51 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Ethcore-specific rpc interface for operations altering the settings.
+
+use std::sync::Arc;
+use jsonrpc_core::*;
+
+/// Ethcore-specific rpc interface for operations altering the settings.
+pub trait EthcoreSet: Sized + Send + Sync + 'static {
+
+	/// Sets new minimal gas price for mined blocks.
+	fn set_min_gas_price(&self, _: Params) -> Result<Value, Error>;
+
+	/// Sets new gas floor target for mined blocks.
+	fn set_gas_floor_target(&self, _: Params) -> Result<Value, Error>;
+
+	/// Sets new extra data for mined blocks.
+	fn set_extra_data(&self, _: Params) -> Result<Value, Error>;
+
+	/// Sets new author for mined block.
+	fn set_author(&self, _: Params) -> Result<Value, Error>;
+
+	/// Sets the limits for transaction queue.
+	fn set_transactions_limit(&self, _: Params) -> Result<Value, Error>;
+
+	/// Should be used to convert object to io delegate.
+	fn to_delegate(self) -> IoDelegate<Self> {
+		let mut delegate = IoDelegate::new(Arc::new(self));
+		delegate.add_method("ethcore_setMinGasPrice", EthcoreSet::set_min_gas_price);
+		delegate.add_method("ethcore_setGasFloorTarget", EthcoreSet::set_gas_floor_target);
+		delegate.add_method("ethcore_setExtraData", EthcoreSet::set_extra_data);
+		delegate.add_method("ethcore_setAuthor", EthcoreSet::set_author);
+		delegate.add_method("ethcore_setTransactionsLimit", EthcoreSet::set_transactions_limit);
+
+		delegate
+	}
+}

rpc/src/v1/traits/mod.rs

@@ -21,6 +21,7 @@ pub mod eth;
 pub mod net;
 pub mod personal;
 pub mod ethcore;
+pub mod ethcore_set;
 pub mod traces;
 pub mod rpc;
 
@@ -29,6 +30,7 @@ pub use self::eth::{Eth, EthFilter, EthSigning};
 pub use self::net::Net;
 pub use self::personal::{Personal, PersonalSigner};
 pub use self::ethcore::Ethcore;
+pub use self::ethcore_set::EthcoreSet;
 pub use self::traces::Traces;
 pub use self::rpc::Rpc;
 

rpc/src/v1/traits/personal.rs

@@ -33,9 +33,13 @@ pub trait Personal: Sized + Send + Sync + 'static {
 	/// Sends transaction and signs it in single call. The account is not unlocked in such case.
 	fn sign_and_send_transaction(&self, _: Params) -> Result<Value, Error>;
 
+	/// Returns `true` if Trusted Signer is enabled, `false` otherwise.
+	fn signer_enabled(&self, _: Params) -> Result<Value, Error>;
+
 	/// Should be used to convert object to io delegate.
 	fn to_delegate(self) -> IoDelegate<Self> {
 		let mut delegate = IoDelegate::new(Arc::new(self));
+		delegate.add_method("personal_signerEnabled", Personal::signer_enabled);
 		delegate.add_method("personal_listAccounts", Personal::accounts);
 		delegate.add_method("personal_newAccount", Personal::new_account);
 		delegate.add_method("personal_unlockAccount", Personal::unlock_account);

rpc/src/v1/traits/traces.rs

@@ -32,11 +32,8 @@ pub trait Traces: Sized + Send + Sync + 'static {
 	/// Returns all traces produced at given block.
 	fn block_traces(&self, _: Params) -> Result<Value, Error>;
 
-	/// Executes the given call and returns the VM trace for it.
+	/// Executes the given call and returns a number of possible traces for it.
-	fn vm_trace_call(&self, _: Params) -> Result<Value, Error>;
+	fn call(&self, _: Params) -> Result<Value, Error>;
-
-	/// Executes the given call and returns the diff for it.
-	fn state_diff_call(&self, params: Params) -> Result<Value, Error>;
 
 	/// Should be used to convert object to io delegate.
 	fn to_delegate(self) -> IoDelegate<Self> {
@@ -45,9 +42,7 @@ pub trait Traces: Sized + Send + Sync + 'static {
 		delegate.add_method("trace_get", Traces::trace);
 		delegate.add_method("trace_transaction", Traces::transaction_traces);
 		delegate.add_method("trace_block", Traces::block_traces);
-
+		delegate.add_method("trace_call", Traces::call);
-		delegate.add_method("trace_vmTraceCall", Traces::vm_trace_call);
-		delegate.add_method("trace_stateDiffCall", Traces::state_diff_call);
 
 		delegate
 	}

rpc/src/v1/types/bytes.rs

@@ -36,6 +36,12 @@ impl Bytes {
 	}
 }
 
+impl From<Vec<u8>> for Bytes {
+	fn from(bytes: Vec<u8>) -> Bytes {
+		Bytes(bytes)
+	}
+}
+
 impl Serialize for Bytes {
 	fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
 	where S: Serializer {

rpc/src/v1/types/mod.rs.in

@@ -41,5 +41,5 @@ pub use self::transaction::Transaction;
 pub use self::transaction_request::{TransactionRequest, TransactionConfirmation, TransactionModification};
 pub use self::call_request::CallRequest;
 pub use self::receipt::Receipt;
-pub use self::trace::Trace;
+pub use self::trace::{Trace, LocalizedTrace, StateDiff, VMTrace};
 pub use self::trace_filter::TraceFilter;

rpc/src/v1/types/trace.rs

@@ -14,11 +14,201 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-use util::{Address, U256, H256};
+use std::collections::BTreeMap;
+use util::{Address, U256, H256, Uint};
+use serde::{Serialize, Serializer};
 use ethcore::trace::trace;
-use ethcore::trace::LocalizedTrace;
+use ethcore::trace::{Trace as EthTrace, LocalizedTrace as EthLocalizedTrace};
+use ethcore::trace as et;
+use ethcore::state_diff;
+use ethcore::account_diff;
 use v1::types::Bytes;
 
+#[derive(Debug, Serialize)]
+/// A diff of some chunk of memory.
+pub struct MemoryDiff {
+	/// Offset into memory the change begins.
+	pub off: usize,
+	/// The changed data.
+	pub data: Vec<u8>,
+}
+
+impl From<et::MemoryDiff> for MemoryDiff {
+	fn from(c: et::MemoryDiff) -> Self {
+		MemoryDiff {
+			off: c.offset,
+			data: c.data,
+		}
+	}
+}
+
+#[derive(Debug, Serialize)]
+/// A diff of some storage value.
+pub struct StorageDiff {
+	/// Which key in storage is changed.
+	pub key: U256,
+	/// What the value has been changed to.
+	pub val: U256,
+}
+
+impl From<et::StorageDiff> for StorageDiff {
+	fn from(c: et::StorageDiff) -> Self {
+		StorageDiff {
+			key: c.location,
+			val: c.value,
+		}
+	}
+}
+
+#[derive(Debug, Serialize)]
+/// A record of an executed VM operation.
+pub struct VMExecutedOperation {
+	/// The total gas used.
+	#[serde(rename="used")]
+	pub used: u64,
+	/// The stack item placed, if any.
+	pub push: Vec<U256>,
+	/// If altered, the memory delta.
+	#[serde(rename="mem")]
+	pub mem: Option<MemoryDiff>,
+	/// The altered storage value, if any.
+	#[serde(rename="store")]
+	pub store: Option<StorageDiff>,
+}
+
+impl From<et::VMExecutedOperation> for VMExecutedOperation {
+	fn from(c: et::VMExecutedOperation) -> Self {
+		VMExecutedOperation {
+			used: c.gas_used.low_u64(),
+			push: c.stack_push,
+			mem: c.mem_diff.map(From::from),
+			store: c.store_diff.map(From::from),
+		}
+	}
+}
+
+#[derive(Debug, Serialize)]
+/// A record of the execution of a single VM operation.
+pub struct VMOperation {
+	/// The program counter.
+	pub pc: usize,
+	/// The gas cost for this instruction.
+	pub cost: u64,
+	/// Information concerning the execution of the operation.
+	pub ex: Option<VMExecutedOperation>,
+	/// Subordinate trace of the CALL/CREATE if applicable.
+	pub sub: Option<VMTrace>,
+}
+
+impl From<(et::VMOperation, Option<et::VMTrace>)> for VMOperation {
+	fn from(c: (et::VMOperation, Option<et::VMTrace>)) -> Self {
+		VMOperation {
+			pc: c.0.pc,
+			cost: c.0.gas_cost.low_u64(),
+			ex: c.0.executed.map(From::from),
+			sub: c.1.map(From::from),
+		}
+	}
+}
+
+#[derive(Debug, Serialize)]
+/// A record of a full VM trace for a CALL/CREATE.
+pub struct VMTrace {
+	/// The code to be executed.
+	pub code: Vec<u8>,
+	/// The operations executed.
+	pub ops: Vec<VMOperation>,
+}
+
+impl From<et::VMTrace> for VMTrace {
+	fn from(c: et::VMTrace) -> Self {
+		let mut subs = c.subs.into_iter();
+		let mut next_sub = subs.next();
+		VMTrace {
+			code: c.code,
+			ops: c.operations
+				.into_iter()
+				.enumerate()
+				.map(|(i, op)| (op, {
+					let have_sub = next_sub.is_some() && next_sub.as_ref().unwrap().parent_step == i;
+					if have_sub {
+						let r = next_sub.clone();
+						next_sub = subs.next();
+						r
+					} else { None }
+				}).into())
+				.collect(),
+		}
+	}
+}
+
+#[derive(Debug, Serialize)]
+/// Aux type for Diff::Changed.
+pub struct ChangedType<T> where T: Serialize {
+	from: T,
+	to: T,
+}
+
+#[derive(Debug, Serialize)]
+/// Serde-friendly `Diff` shadow.
+pub enum Diff<T> where T: Serialize {
+	#[serde(rename="=")]
+	Same,
+	#[serde(rename="+")]
+	Born(T),
+	#[serde(rename="-")]
+	Died(T),
+	#[serde(rename="*")]
+	Changed(ChangedType<T>),
+}
+
+impl<T, U> From<account_diff::Diff<T>> for Diff<U> where T: Eq, U: Serialize + From<T> {
+	fn from(c: account_diff::Diff<T>) -> Self {
+		match c {
+			account_diff::Diff::Same => Diff::Same,
+			account_diff::Diff::Born(t) => Diff::Born(t.into()),
+			account_diff::Diff::Died(t) => Diff::Died(t.into()),
+			account_diff::Diff::Changed(t, u) => Diff::Changed(ChangedType{from: t.into(), to: u.into()}),
+		}
+	}
+}
+
+#[derive(Debug, Serialize)]
+/// Serde-friendly `AccountDiff` shadow.
+pub struct AccountDiff {
+	pub balance: Diff<U256>,
+	pub nonce: Diff<U256>,
+	pub code: Diff<Bytes>,
+	pub storage: BTreeMap<H256, Diff<H256>>,
+}
+
+impl From<account_diff::AccountDiff> for AccountDiff {
+	fn from(c: account_diff::AccountDiff) -> Self {
+		AccountDiff {
+			balance: c.balance.into(),
+			nonce: c.nonce.into(),
+			code: c.code.into(),
+			storage: c.storage.into_iter().map(|(k, v)| (k, v.into())).collect(),
+		}
+	}
+}
+
+/// Serde-friendly `StateDiff` shadow.
+pub struct StateDiff(BTreeMap<Address, AccountDiff>);
+
+impl Serialize for StateDiff {
+	fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+	where S: Serializer {
+		Serialize::serialize(&self.0, serializer)
+	}
+}
+
+impl From<state_diff::StateDiff> for StateDiff {
+	fn from(c: state_diff::StateDiff) -> Self {
+		StateDiff(c.0.into_iter().map(|(k, v)| (k, v.into())).collect())
+	}
+}
+
 /// Create response
 #[derive(Debug, Serialize)]
 pub struct Create {
@@ -161,7 +351,7 @@ impl From<trace::Res> for Res {
 
 /// Trace
 #[derive(Debug, Serialize)]
-pub struct Trace {
+pub struct LocalizedTrace {
 	/// Action
 	action: Action,
 	/// Result
@@ -185,9 +375,9 @@ pub struct Trace {
 	block_hash: H256,
 }
 
-impl From<LocalizedTrace> for Trace {
+impl From<EthLocalizedTrace> for LocalizedTrace {
-	fn from(t: LocalizedTrace) -> Self {
+	fn from(t: EthLocalizedTrace) -> Self {
-		Trace {
+		LocalizedTrace {
 			action: From::from(t.action),
 			result: From::from(t.result),
 			trace_address: t.trace_address.into_iter().map(From::from).collect(),
@@ -200,16 +390,41 @@ impl From<LocalizedTrace> for Trace {
 	}
 }
 
+/// Trace
+#[derive(Debug, Serialize)]
+pub struct Trace {
+	/// Depth within the call trace tree.
+	depth: usize,
+	/// Action
+	action: Action,
+	/// Result
+	result: Res,
+	/// Subtraces
+	subtraces: Vec<Trace>,
+}
+
+impl From<EthTrace> for Trace {
+	fn from(t: EthTrace) -> Self {
+		Trace {
+			depth: t.depth.into(),
+			action: t.action.into(),
+			result: t.result.into(),
+			subtraces: t.subs.into_iter().map(From::from).collect(),
+		}
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use serde_json;
+	use std::collections::BTreeMap;
 	use util::{U256, H256, Address};
 	use v1::types::Bytes;
 	use super::*;
 
 	#[test]
 	fn test_trace_serialize() {
-		let t = Trace {
+		let t = LocalizedTrace {
 			action: Action::Call(Call {
 				from: Address::from(4),
 				to: Address::from(5),
@@ -232,6 +447,71 @@ mod tests {
 		assert_eq!(serialized, r#"{"action":{"call":{"from":"0x0000000000000000000000000000000000000004","to":"0x0000000000000000000000000000000000000005","value":"0x06","gas":"0x07","input":"0x1234"}},"result":{"call":{"gasUsed":"0x08","output":"0x5678"}},"traceAddress":["0x0a"],"subtraces":"0x01","transactionPosition":"0x0b","transactionHash":"0x000000000000000000000000000000000000000000000000000000000000000c","blockNumber":"0x0d","blockHash":"0x000000000000000000000000000000000000000000000000000000000000000e"}"#);
 	}
 
+	#[test]
+	fn test_vmtrace_serialize() {
+		let t = VMTrace {
+			code: vec![0, 1, 2, 3],
+			ops: vec![
+				VMOperation {
+					pc: 0,
+					cost: 10,
+					ex: None,
+					sub: None,
+				},
+				VMOperation {
+					pc: 1,
+					cost: 11,
+					ex: Some(VMExecutedOperation {
+						used: 10,
+						push: vec![69.into()],
+						mem: None,
+						store: None,
+					}),
+					sub: Some(VMTrace {
+						code: vec![0],
+						ops: vec![
+							VMOperation {
+								pc: 0,
+								cost: 0,
+								ex: Some(VMExecutedOperation {
+									used: 10,
+									push: vec![42.into()],
+									mem: Some(MemoryDiff {off: 42, data: vec![1, 2, 3]}),
+									store: Some(StorageDiff {key: 69.into(), val: 42.into()}),
+								}),
+								sub: None,
+							}
+						]
+					}),
+				}
+			]
+		};
+		let serialized = serde_json::to_string(&t).unwrap();
+		assert_eq!(serialized, r#"{"code":[0,1,2,3],"ops":[{"pc":0,"cost":10,"ex":null,"sub":null},{"pc":1,"cost":11,"ex":{"used":10,"push":["0x45"],"mem":null,"store":null},"sub":{"code":[0],"ops":[{"pc":0,"cost":0,"ex":{"used":10,"push":["0x2a"],"mem":{"off":42,"data":[1,2,3]},"store":{"key":"0x45","val":"0x2a"}},"sub":null}]}}]}"#);
+	}
+
+	#[test]
+	fn test_statediff_serialize() {
+		let t = StateDiff(map![
+			42.into() => AccountDiff {
+				balance: Diff::Same,
+				nonce: Diff::Born(1.into()),
+				code: Diff::Same,
+				storage: map![
+					42.into() => Diff::Same
+				]
+			},
+			69.into() => AccountDiff {
+				balance: Diff::Same,
+				nonce: Diff::Changed(ChangedType { from: 1.into(), to: 0.into() }),
+				code: Diff::Died(vec![96].into()),
+				storage: map![],
+			}
+		]);
+		let serialized = serde_json::to_string(&t).unwrap();
+		assert_eq!(serialized, r#"{"0x000000000000000000000000000000000000002a":{"balance":{"=":[]},"nonce":{"+":"0x01"},"code":{"=":[]},"storage":{"0x000000000000000000000000000000000000000000000000000000000000002a":{"=":[]}}},"0x0000000000000000000000000000000000000045":{"balance":{"=":[]},"nonce":{"*":{"from":"0x01","to":"0x00"}},"code":{"-":"0x60"},"storage":{}}}"#);
+	}
+
 	#[test]
 	fn test_action_serialize() {
 		let actions = vec![Action::Call(Call {

rpc/src/v1/types/transaction_request.rs

@@ -49,7 +49,7 @@ pub struct TransactionConfirmation {
 	pub transaction: TransactionRequest,
 }
 
-/// Possible modifications to the confirmed transaction sent by SystemUI
+/// Possible modifications to the confirmed transaction sent by `SignerUI`
 #[derive(Debug, PartialEq, Deserialize)]
 pub struct TransactionModification {
 	/// Modified gas price

signer/Cargo.toml

@@ -11,6 +11,7 @@ build = "build.rs"
 rustc_version = "0.1"
 
 [dependencies]
+rand = "0.3.14"
 jsonrpc-core = "2.0"
 log = "0.3"
 env_logger = "0.3"

signer/src/authcode_store.rs

@@ -0,0 +1,187 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use rand::Rng;
+use rand::os::OsRng;
+use std::io;
+use std::io::{Read, Write};
+use std::fs;
+use std::path::Path;
+use std::time;
+use util::{H256, Hashable};
+
+/// Providing current time in seconds
+pub trait TimeProvider {
+	/// Returns timestamp (in seconds since epoch)
+	fn now(&self) -> u64;
+}
+
+impl<F : Fn() -> u64> TimeProvider for F {
+	fn now(&self) -> u64 {
+		self()
+	}
+}
+
+/// Default implementation of `TimeProvider` using system time.
+#[derive(Default)]
+pub struct DefaultTimeProvider;
+
+impl TimeProvider for DefaultTimeProvider {
+	fn now(&self) -> u64 {
+		time::UNIX_EPOCH.elapsed().expect("Valid time has to be set in your system.").as_secs()
+	}
+}
+
+/// No of seconds the hash is valid
+const TIME_THRESHOLD: u64 = 2;
+const TOKEN_LENGTH: usize = 16;
+
+/// Manages authorization codes for `SignerUIs`
+pub struct AuthCodes<T: TimeProvider = DefaultTimeProvider> {
+	codes: Vec<String>,
+	now: T,
+}
+
+impl AuthCodes<DefaultTimeProvider> {
+
+	/// Reads `AuthCodes` from file and creates new instance using `DefaultTimeProvider`.
+	pub fn from_file(file: &Path) -> io::Result<AuthCodes> {
+		let content = {
+			if let Ok(mut file) = fs::File::open(file) {
+				let mut s = String::new();
+				let _ = try!(file.read_to_string(&mut s));
+				s
+			} else {
+				"".into()
+			}
+		};
+		let codes = content.lines()
+			.filter(|f| f.len() >= TOKEN_LENGTH)
+			.map(String::from)
+			.collect();
+		Ok(AuthCodes {
+			codes: codes,
+			now: DefaultTimeProvider::default(),
+		})
+	}
+
+}
+
+impl<T: TimeProvider> AuthCodes<T> {
+
+	/// Writes all `AuthCodes` to a disk.
+	pub fn to_file(&self, file: &Path) -> io::Result<()> {
+		let mut file = try!(fs::File::create(file));
+		let content = self.codes.join("\n");
+		file.write_all(content.as_bytes())
+	}
+
+	/// Creates a new `AuthCodes` store with given `TimeProvider`.
+	pub fn new(codes: Vec<String>, now: T) -> Self {
+		AuthCodes {
+			codes: codes,
+			now: now,
+		}
+	}
+
+	/// Checks if given hash is correct identifier of `SignerUI`
+	pub fn is_valid(&self, hash: &H256, time: u64) -> bool {
+		let now = self.now.now();
+		// check time
+		if time >= now + TIME_THRESHOLD || time <= now - TIME_THRESHOLD {
+			warn!(target: "signer", "Received old authentication request.");
+			return false;
+		}
+
+		// look for code
+		self.codes.iter()
+			.any(|code| &format!("{}:{}", code, time).sha3() == hash)
+	}
+
+	/// Generates and returns a new code that can be used by `SignerUIs`
+	pub fn generate_new(&mut self) -> io::Result<String> {
+		let mut rng = try!(OsRng::new());
+		let code = rng.gen_ascii_chars().take(TOKEN_LENGTH).collect::<String>();
+		let readable_code = code.as_bytes()
+			.chunks(4)
+			.filter_map(|f| String::from_utf8(f.to_vec()).ok())
+			.collect::<Vec<String>>()
+			.join("-");
+		info!(target: "signer", "New authentication token generated.");
+		self.codes.push(code);
+		Ok(readable_code)
+	}
+}
+
+
+#[cfg(test)]
+mod tests {
+
+	use util::{H256, Hashable};
+	use super::*;
+
+	fn generate_hash(val: &str, time: u64) -> H256 {
+		format!("{}:{}", val, time).sha3()
+	}
+
+	#[test]
+	fn should_return_true_if_hash_is_valid() {
+		// given
+		let code = "23521352asdfasdfadf";
+		let time = 99;
+		let codes = AuthCodes::new(vec![code.into()], || 100);
+
+		// when
+		let res = codes.is_valid(&generate_hash(code, time), time);
+
+		// then
+		assert_eq!(res, true);
+	}
+
+	#[test]
+	fn should_return_false_if_code_is_unknown() {
+		// given
+		let code = "23521352asdfasdfadf";
+		let time = 99;
+		let codes = AuthCodes::new(vec!["1".into()], || 100);
+
+		// when
+		let res = codes.is_valid(&generate_hash(code, time), time);
+
+		// then
+		assert_eq!(res, false);
+	}
+
+	#[test]
+	fn should_return_false_if_hash_is_valid_but_time_is_invalid() {
+		// given
+		let code = "23521352asdfasdfadf";
+		let time = 105;
+		let time2 = 95;
+		let codes = AuthCodes::new(vec![code.into()], || 100);
+
+		// when
+		let res1 = codes.is_valid(&generate_hash(code, time), time);
+		let res2 = codes.is_valid(&generate_hash(code, time2), time2);
+
+		// then
+		assert_eq!(res1, false);
+		assert_eq!(res2, false);
+	}
+
+}
+
+

signer/src/lib.rs

@@ -23,8 +23,8 @@
 //! This module manages your private keys and accounts/identities
 //! that can be used within Dapps.
 //!
-//! It exposes API (over `WebSockets`) accessed by System UIs.
+//! It exposes API (over `WebSockets`) accessed by Signer UIs.
-//! Each transaction sent by Dapp is broadcasted to System UIs
+//! Each transaction sent by Dapp is broadcasted to Signer UIs
 //! and their responsibility is to confirm (or confirm and sign)
 //! the transaction for you.
 //!
@@ -38,13 +38,14 @@
 //!
 //!	fn main() {
 //!	 let queue = Arc::new(ConfirmationsQueue::default());
-//!	 let _server = ServerBuilder::new(queue).start("127.0.0.1:8084".parse().unwrap());
+//!	 let _server = ServerBuilder::new(queue, "/tmp/authcodes".into()).start("127.0.0.1:8084".parse().unwrap());
 //!	}
 //! ```
 
 #[macro_use]
 extern crate log;
 extern crate env_logger;
+extern crate rand;
 
 extern crate ethcore_util as util;
 extern crate ethcore_rpc as rpc;
@@ -52,7 +53,10 @@ extern crate jsonrpc_core;
 extern crate ws;
 extern crate parity_minimal_sysui as sysui;
 
+mod authcode_store;
 mod ws_server;
+
+pub use authcode_store::*;
 pub use ws_server::*;
 
 #[cfg(test)]

signer/src/ws_server/mod.rs

@@ -19,6 +19,7 @@
 use ws;
 use std;
 use std::thread;
+use std::path::PathBuf;
 use std::default::Default;
 use std::ops::Drop;
 use std::sync::Arc;
@@ -51,6 +52,7 @@ impl From<ws::Error> for ServerError {
 pub struct ServerBuilder {
 	queue: Arc<ConfirmationsQueue>,
 	handler: Arc<IoHandler>,
+	authcodes_path: PathBuf,
 }
 
 impl Extendable for ServerBuilder {
@@ -61,17 +63,18 @@ impl Extendable for ServerBuilder {
 
 impl ServerBuilder {
 	/// Creates new `ServerBuilder`
-	pub fn new(queue: Arc<ConfirmationsQueue>) -> Self {
+	pub fn new(queue: Arc<ConfirmationsQueue>, authcodes_path: PathBuf) -> Self {
 		ServerBuilder {
 			queue: queue,
 			handler: Arc::new(IoHandler::new()),
+			authcodes_path: authcodes_path,
 		}
 	}
 
 	/// Starts a new `WebSocket` server in separate thread.
 	/// Returns a `Server` handle which closes the server when droped.
 	pub fn start(self, addr: SocketAddr) -> Result<Server, ServerError> {
-		Server::start(addr, self.handler, self.queue)
+		Server::start(addr, self.handler, self.queue, self.authcodes_path)
 	}
 }
 
@@ -86,7 +89,7 @@ pub struct Server {
 impl Server {
 	/// Starts a new `WebSocket` server in separate thread.
 	/// Returns a `Server` handle which closes the server when droped.
-	fn start(addr: SocketAddr, handler: Arc<IoHandler>, queue: Arc<ConfirmationsQueue>) -> Result<Server, ServerError> {
+	fn start(addr: SocketAddr, handler: Arc<IoHandler>, queue: Arc<ConfirmationsQueue>, authcodes_path: PathBuf) -> Result<Server, ServerError> {
 		let config = {
 			let mut config = ws::Settings::default();
 			config.max_connections = 10;
@@ -95,7 +98,8 @@ impl Server {
 		};
 
 		// Create WebSocket
-		let ws = try!(ws::Builder::new().with_settings(config).build(session::Factory::new(handler)));
+		let origin = format!("{}", addr);
+		let ws = try!(ws::Builder::new().with_settings(config).build(session::Factory::new(handler, origin, authcodes_path)));
 
 		let panic_handler = PanicHandler::new_in_arc();
 		let ph = panic_handler.clone();

signer/src/ws_server/session.rs

@@ -18,33 +18,97 @@
 
 use ws;
 use sysui;
+use authcode_store::AuthCodes;
+use std::path::{PathBuf, Path};
 use std::sync::Arc;
+use std::str::FromStr;
 use jsonrpc_core::IoHandler;
+use util::H256;
+
+fn origin_is_allowed(self_origin: &str, header: Option<&Vec<u8>>) -> bool {
+	match header {
+		None => false,
+		Some(h) => {
+			let v = String::from_utf8(h.clone()).ok();
+			match v {
+				Some(ref origin) if origin.starts_with("chrome-extension://") => true,
+				Some(ref origin) if origin.starts_with(self_origin) => true,
+				Some(ref origin) if origin.starts_with(&format!("http://{}", self_origin)) => true,
+				_ => false
+			}
+		}
+	}
+}
+
+fn auth_is_valid(codes: &Path, protocols: ws::Result<Vec<&str>>) -> bool {
+	match protocols {
+		Ok(ref protocols) if protocols.len() == 1 => {
+			protocols.iter().any(|protocol| {
+				let mut split = protocol.split('_');
+				let auth = split.next().and_then(|v| H256::from_str(v).ok());
+				let time = split.next().and_then(|v| u64::from_str_radix(v, 10).ok());
+
+				if let (Some(auth), Some(time)) = (auth, time) {
+					// Check if the code is valid
+					AuthCodes::from_file(codes)
+						.map(|codes| codes.is_valid(&auth, time))
+						.unwrap_or(false)
+				} else {
+					false
+				}
+			})
+		},
+		_ => false
+	}
+}
 
 pub struct Session {
 	out: ws::Sender,
+	self_origin: String,
+	authcodes_path: PathBuf,
 	handler: Arc<IoHandler>,
 }
 
 impl ws::Handler for Session {
 	fn on_request(&mut self, req: &ws::Request) -> ws::Result<(ws::Response)> {
+		let origin = req.header("origin").or_else(|| req.header("Origin"));
+		let host = req.header("host").or_else(|| req.header("Host"));
+
+		// Check request origin and host header.
+		if !origin_is_allowed(&self.self_origin, origin) && !origin_is_allowed(&self.self_origin, host) {
+			warn!(target: "signer", "Blocked connection to Signer API from untrusted origin.");
+			return Ok(ws::Response::forbidden(format!("You are not allowed to access system ui. Use: http://{}", self.self_origin)));
+		}
+
 		// Detect if it's a websocket request.
 		if req.header("sec-websocket-key").is_some() {
-			return ws::Response::from_request(req);
+			// Check authorization
+			if !auth_is_valid(&self.authcodes_path, req.protocols()) {
+				info!(target: "signer", "Unauthorized connection to Signer API blocked.");
+				return Ok(ws::Response::forbidden("You are not authorized.".into()));
+			}
+
+			let protocols = req.protocols().expect("Existence checked by authorization.");
+			let protocol = protocols.get(0).expect("Proved by authorization.");
+			return ws::Response::from_request(req).map(|mut res| {
+				// To make WebSockets connection successful we need to send back the protocol header.
+				res.set_protocol(protocol);
+				res
+			});
 		}
 
 		// Otherwise try to serve a page.
 		sysui::handle(req.resource())
 			.map_or_else(
 				// return error
-				|| ws::Response::from_request(req),
+				|| Ok(ws::Response::not_found("Page not found".into())),
 				// or serve the file
 				|f| {
 					let content_len = format!("{}", f.content.as_bytes().len());
 					let mut res = ws::Response::ok(f.content.into());
 					{
 						let mut headers = res.headers_mut();
-						headers.push(("Server".into(), b"Parity/SystemUI".to_vec()));
+						headers.push(("Server".into(), b"Parity/SignerUI".to_vec()));
 						headers.push(("Connection".into(), b"Closed".to_vec()));
 						headers.push(("Content-Length".into(), content_len.as_bytes().to_vec()));
 						headers.push(("Content-Type".into(), f.mime.as_bytes().to_vec()));
@@ -67,12 +131,16 @@ impl ws::Handler for Session {
 
 pub struct Factory {
 	handler: Arc<IoHandler>,
+	self_origin: String,
+	authcodes_path: PathBuf,
 }
 
 impl Factory {
-	pub fn new(handler: Arc<IoHandler>) -> Self {
+	pub fn new(handler: Arc<IoHandler>, self_origin: String, authcodes_path: PathBuf) -> Self {
 		Factory {
 			handler: handler,
+			self_origin: self_origin,
+			authcodes_path: authcodes_path,
 		}
 	}
 }
@@ -84,6 +152,8 @@ impl ws::Factory for Factory {
 		Session {
 			out: sender,
 			handler: self.handler.clone(),
+			self_origin: self.self_origin.clone(),
+			authcodes_path: self.authcodes_path.clone(),
 		}
 	}
 }

util/res/pat/p1.json

@@ -0,0 +1,21 @@
+{
+	"address": "3f49624084b67849c7b4e805c5988c21a430f9d9",
+	"Crypto": {
+		"cipher": "aes-128-ctr",
+		"ciphertext": "9f27e3dd4fc73e7103ed61e5493662189a3eb52223ae49e3d1deacc04c889eae",
+		"cipherparams": {
+			"iv": "457494bf05f2618c397dc74dbb5181c0"
+		},
+		"kdf": "scrypt",
+		"kdfparams": {
+			"dklen": 32,
+			"n": 262144,
+			"p": 1,
+			"r": 8,
+			"salt": "db14edb18c41ee7f5ec4397df89c3a2ae4d0af60884c52bb54ce490574f8df33"
+		},
+		"mac": "572d24532438d31fdf513c744a3ff26c933ffda5744ee42bc71661cbe3f2112e"
+	},
+	"id": "62a0ad73-556d-496a-8e1c-0783d30d3ace",
+	"version": 3
+}

util/res/pat/p2.json

@@ -0,0 +1,21 @@
+{
+	"address": "5ba4dcf897e97c2bdf8315b9ef26c13c085988cf",
+	"Crypto": {
+		"cipher": "aes-128-ctr",
+		"ciphertext": "d4a08ec930163778273920f6ad1d49b71836337be6fd9863993ac700a612fddd",
+		"cipherparams": {
+			"iv": "89ce5ec129fc27cd5bcbeb8c92bdad50"
+		},
+		"kdf": "scrypt",
+		"kdfparams": {
+			"dklen": 32,
+			"n": 262144,
+			"p": 1,
+			"r": 8,
+			"salt": "612ab108dc37e69ee8af37a7b24bf7f2234086d7bbf945bacdeccce331f7f84a"
+		},
+		"mac": "4152caa7444e06784223d735cea80cd2690b4c587ad8db3d5529442227b25695"
+	},
+	"id": "35086353-fb12-4029-b56b-033cd61ce35b",
+	"version": 3
+}

util/src/keys/directory.rs

@@ -465,7 +465,8 @@ pub struct KeyDirectory {
 	cache_usage: RwLock<VecDeque<Uuid>>,
 }
 
-fn restrict_permissions_owner(file_path: &Path) -> Result<(), i32>  {
+/// Restricts the permissions of given path only to the owner.
+pub fn restrict_permissions_owner(file_path: &Path) -> Result<(), i32>  {
 	let cstr = ::std::ffi::CString::new(file_path.to_str().unwrap()).unwrap();
 	match unsafe { ::libc::chmod(cstr.as_ptr(), ::libc::S_IWUSR | ::libc::S_IRUSR) } {
 		0 => Ok(()),

util/src/keys/geth_import.rs

@@ -80,9 +80,10 @@ pub fn import_geth_key(secret_store: &mut SecretStore, geth_keyfile_path: &Path)
 }
 
 /// Imports all geth keys in the directory
-pub fn import_geth_keys(secret_store: &mut SecretStore, geth_keyfiles_directory: &Path) -> Result<(), ImportError> {
+pub fn import_geth_keys(secret_store: &mut SecretStore, geth_keyfiles_directory: &Path) -> Result<usize, ImportError> {
 	use std::path::PathBuf;
 	let geth_files = try!(enumerate_geth_keys(geth_keyfiles_directory));
+	let mut total = 0;
 	for &(ref address, ref file_path) in &geth_files {
 		let mut path = PathBuf::new();
 		path.push(geth_keyfiles_directory);
@@ -90,18 +91,45 @@ pub fn import_geth_keys(secret_store: &mut SecretStore, geth_keyfiles_directory:
 		if let Err(e) = import_geth_key(secret_store, Path::new(&path)) {
 			warn!("Skipped geth address {}, error importing: {:?}", address, e)
 		}
+		else { total = total + 1}
 	}
-	Ok(())
+	Ok(total)
 }
 
 
 /// Gets the default geth keystore directory.
-///
-/// Based on https://github.com/ethereum/go-ethereum/blob/e553215/common/path.go#L75
 pub fn keystore_dir(is_testnet: bool) -> PathBuf {
 	path::ethereum::with_default(if is_testnet {"testnet/keystore"} else {"keystore"})
 }
 
+/// Imports key(s) from provided file/directory
+pub fn import_keys_path(secret_store: &mut SecretStore, path: &str) -> Result<usize, ImportError> {
+	// check if it is just one file or directory
+	if let Ok(meta) = fs::metadata(path) {
+		if meta.is_file() {
+			try!(import_geth_key(secret_store, Path::new(path)));
+			return Ok(1);
+		}
+		else if meta.is_dir() {
+			return Ok(try!(fs::read_dir(path)).fold(
+				0,
+				|total, p|
+					total +
+						match p {
+							Ok(dir_entry) => import_keys_path(secret_store, dir_entry.path().to_str().unwrap()).unwrap_or_else(|_| 0),
+							Err(e) => { warn!("Error importing dir entry: {:?}", e); 0 },
+						}
+			))
+		}
+	}
+	Ok(0)
+}
+
+/// Imports all keys from list of provided files/directories
+pub fn import_keys_paths(secret_store: &mut SecretStore, path: &[String]) -> Result<usize, ImportError> {
+	Ok(path.iter().fold(0, |total, ref p| total + import_keys_path(secret_store, &p).unwrap_or_else(|_| 0)))
+}
+
 #[cfg(test)]
 mod tests {
 	use super::*;
@@ -115,10 +143,21 @@ mod tests {
 		}
 	}
 
+	fn pat_path() -> &'static str {
+		match ::std::fs::metadata("res") {
+			Ok(_) => "res/pat",
+			Err(_) => "util/res/pat"
+		}
+	}
+
 	fn test_path_param(param_val: &'static str) -> String {
 		test_path().to_owned() + param_val
 	}
 
+	fn pat_path_param(param_val: &'static str) -> String {
+		pat_path().to_owned() + param_val
+	}
+
 	#[test]
 	fn can_enumerate() {
 		let keys = enumerate_geth_keys(Path::new(test_path())).unwrap();
@@ -191,4 +230,32 @@ mod tests {
 		assert!(val.is_ok());
 		assert_eq!(32, val.unwrap().len());
 	}
+
+	#[test]
+	fn can_import_by_filename() {
+		let temp = ::devtools::RandomTempPath::create_dir();
+		let mut secret_store = SecretStore::new_in(temp.as_path());
+
+		let amount = import_keys_path(&mut secret_store, &pat_path_param("/p1.json")).unwrap();
+		assert_eq!(1, amount);
+	}
+
+	#[test]
+	fn can_import_by_dir() {
+		let temp = ::devtools::RandomTempPath::create_dir();
+		let mut secret_store = SecretStore::new_in(temp.as_path());
+
+		let amount = import_keys_path(&mut secret_store, pat_path()).unwrap();
+		assert_eq!(2, amount);
+	}
+
+	#[test]
+	fn can_import_mulitple() {
+		let temp = ::devtools::RandomTempPath::create_dir();
+		let mut secret_store = SecretStore::new_in(temp.as_path());
+
+		let amount = import_keys_paths(&mut secret_store, &[pat_path_param("/p1.json"), pat_path_param("/p2.json")]).unwrap();
+		assert_eq!(2, amount);
+	}
+
 }

util/src/keys/mod.rs

@@ -23,3 +23,4 @@ mod test_account_provider;
 
 pub use self::store::AccountProvider;
 pub use self::test_account_provider::{TestAccount, TestAccountProvider};
+pub use self::geth_import::import_keys_paths;

util/src/path.rs

@@ -53,4 +53,12 @@ pub mod ethereum {
 		pth.push(s);
 		pth
 	}
+
+	/// Get the specific folder inside default ethereum installation configured for testnet
+	pub fn with_testnet(s: &str) -> PathBuf {
+		let mut pth = default();
+		pth.push("testnet");
+		pth.push(s);
+		pth
+	}
 }

util/src/trie/mod.rs

@@ -16,6 +16,8 @@
 
 //! Trie interface and implementation.
 
+use std::fmt;
+
 /// Export the trietraits module.
 pub mod trietraits;
 /// Export the standardmap module.
@@ -33,9 +35,22 @@ pub mod sectriedb;
 /// Export the sectriedbmut module.
 pub mod sectriedbmut;
 
-pub use self::trietraits::*;
+pub use self::trietraits::{Trie, TrieMut};
-pub use self::standardmap::*;
+pub use self::standardmap::{Alphabet, StandardMap, ValueMode};
-pub use self::triedbmut::*;
+pub use self::triedbmut::TrieDBMut;
-pub use self::triedb::*;
+pub use self::triedb::TrieDB;
-pub use self::sectriedbmut::*;
+pub use self::sectriedbmut::SecTrieDBMut;
-pub use self::sectriedb::*;
+pub use self::sectriedb::SecTrieDB;
+
+/// Trie Errors
+#[derive(Debug)]
+pub enum TrieError {
+	/// Attempted to create a trie with a state root not in the DB.
+	InvalidStateRoot,
+}
+
+impl fmt::Display for TrieError {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		write!(f, "Trie Error: Invalid state root.")
+	}
+}

util/src/trie/sectriedb.rs

@@ -16,9 +16,10 @@
 
 use hash::*;
 use sha3::*;
-use hashdb::*;
+use hashdb::HashDB;
-use super::triedb::*;
+use super::triedb::TrieDB;
-use super::trietraits::*;
+use super::trietraits::Trie;
+use super::TrieError;
 
 /// A `Trie` implementation which hashes keys and uses a generic `HashDB` backing database.
 ///
@@ -29,10 +30,12 @@ pub struct SecTrieDB<'db> {
 
 impl<'db> SecTrieDB<'db> {
 	/// Create a new trie with the backing database `db` and empty `root`
+	///
 	/// Initialise to the state entailed by the genesis block.
 	/// This guarantees the trie is built correctly.
-	pub fn new(db: &'db HashDB, root: &'db H256) -> Self {
+	/// Returns an error if root does not exist.
-		SecTrieDB { raw: TrieDB::new(db, root) }
+	pub fn new(db: &'db HashDB, root: &'db H256) -> Result<Self, TrieError> {
+		Ok(SecTrieDB { raw: try!(TrieDB::new(db, root)) })
 	}
 
 	/// Get a reference to the underlying raw `TrieDB` struct.
@@ -60,8 +63,9 @@ impl<'db> Trie for SecTrieDB<'db> {
 
 #[test]
 fn trie_to_sectrie() {
-	use memorydb::*;
+	use memorydb::MemoryDB;
-	use super::triedbmut::*;
+	use super::triedbmut::TrieDBMut;
+	use super::trietraits::TrieMut;
 
 	let mut memdb = MemoryDB::new();
 	let mut root = H256::new();
@@ -69,6 +73,6 @@ fn trie_to_sectrie() {
 		let mut t = TrieDBMut::new(&mut memdb, &mut root);
 		t.insert(&(&[0x01u8, 0x23]).sha3(), &[0x01u8, 0x23]);
 	}
-	let t = SecTrieDB::new(&memdb, &root);
+	let t = SecTrieDB::new(&memdb, &root).unwrap();
 	assert_eq!(t.get(&[0x01u8, 0x23]).unwrap(), &[0x01u8, 0x23]);
 }

util/src/trie/sectriedbmut.rs

@@ -16,9 +16,10 @@
 
 use hash::*;
 use sha3::*;
-use hashdb::*;
+use hashdb::HashDB;
-use super::triedbmut::*;
+use super::triedbmut::TrieDBMut;
-use super::trietraits::*;
+use super::trietraits::{Trie, TrieMut};
+use super::TrieError;
 
 /// A mutable `Trie` implementation which hashes keys and uses a generic `HashDB` backing database.
 ///
@@ -35,10 +36,11 @@ impl<'db> SecTrieDBMut<'db> {
 		SecTrieDBMut { raw: TrieDBMut::new(db, root) }
 	}
 
-	/// Create a new trie with the backing database `db` and `root`
+	/// Create a new trie with the backing database `db` and `root`.
-	/// Panics, if `root` does not exist
+	///
-	pub fn from_existing(db: &'db mut HashDB, root: &'db mut H256) -> Self {
+	/// Returns an error if root does not exist.
-		SecTrieDBMut { raw: TrieDBMut::from_existing(db, root) }
+	pub fn from_existing(db: &'db mut HashDB, root: &'db mut H256) -> Result<Self, TrieError> {
+		Ok(SecTrieDBMut { raw: try!(TrieDBMut::from_existing(db, root)) })
 	}
 
 	/// Get the backing database.
@@ -81,6 +83,6 @@ fn sectrie_to_trie() {
 		let mut t = SecTrieDBMut::new(&mut memdb, &mut root);
 		t.insert(&[0x01u8, 0x23], &[0x01u8, 0x23]);
 	}
-	let t = TrieDB::new(&memdb, &root);
+	let t = TrieDB::new(&memdb, &root).unwrap();
 	assert_eq!(t.get(&(&[0x01u8, 0x23]).sha3()).unwrap(), &[0x01u8, 0x23]);
 }

util/src/trie/triedb.rs

@@ -18,8 +18,9 @@ use common::*;
 use hashdb::*;
 use nibbleslice::*;
 use rlp::*;
-use super::trietraits::*;
+use super::trietraits::Trie;
-use super::node::*;
+use super::node::Node;
+use super::TrieError;
 
 /// A `Trie` implementation using a generic `HashDB` backing database.
 ///
@@ -41,7 +42,7 @@ use super::node::*;
 ///   let mut memdb = MemoryDB::new();
 ///   let mut root = H256::new();
 ///   TrieDBMut::new(&mut memdb, &mut root).insert(b"foo", b"bar");
-///   let t = TrieDB::new(&memdb, &root);
+///   let t = TrieDB::new(&memdb, &root).unwrap();
 ///   assert!(t.contains(b"foo"));
 ///   assert_eq!(t.get(b"foo").unwrap(), b"bar");
 ///   assert!(t.db_items_remaining().is_empty());
@@ -57,16 +58,16 @@ pub struct TrieDB<'db> {
 #[cfg_attr(feature="dev", allow(wrong_self_convention))]
 impl<'db> TrieDB<'db> {
 	/// Create a new trie with the backing database `db` and `root`
-	/// Panics, if `root` does not exist
+	/// Returns an error if `root` does not exist
-	pub fn new(db: &'db HashDB, root: &'db H256) -> Self {
+	pub fn new(db: &'db HashDB, root: &'db H256) -> Result<Self, TrieError> {
 		if !db.contains(root) {
-			flushln!("TrieDB::new({}): Trie root not found!", root);
+			Err(TrieError::InvalidStateRoot)
-			panic!("Trie root not found!");
+		} else {
-		}
+			Ok(TrieDB {
-		TrieDB {
 				db: db,
 				root: root,
 				hash_count: 0
+			})
 		}
 	}
 
@@ -356,6 +357,7 @@ impl<'db> fmt::Debug for TrieDB<'db> {
 
 #[test]
 fn iterator() {
+	use super::trietraits::TrieMut;
 	use memorydb::*;
 	use super::triedbmut::*;
 
@@ -369,6 +371,6 @@ fn iterator() {
 			t.insert(&x, &x);
 		}
 	}
-	assert_eq!(d.iter().map(|i|i.to_vec()).collect::<Vec<_>>(), TrieDB::new(&memdb, &root).iter().map(|x|x.0).collect::<Vec<_>>());
+	assert_eq!(d.iter().map(|i|i.to_vec()).collect::<Vec<_>>(), TrieDB::new(&memdb, &root).unwrap().iter().map(|x|x.0).collect::<Vec<_>>());
-	assert_eq!(d, TrieDB::new(&memdb, &root).iter().map(|x|x.1).collect::<Vec<_>>());
+	assert_eq!(d, TrieDB::new(&memdb, &root).unwrap().iter().map(|x|x.1).collect::<Vec<_>>());
 }

util/src/trie/triedbmut.rs

@@ -18,9 +18,10 @@ use common::*;
 use hashdb::*;
 use nibbleslice::*;
 use rlp::*;
-use super::node::*;
+use super::node::Node;
-use super::journal::*;
+use super::journal::Journal;
-use super::trietraits::*;
+use super::trietraits::{Trie, TrieMut};
+use super::TrieError;
 
 /// A `Trie` implementation using a generic `HashDB` backing database.
 ///
@@ -84,17 +85,16 @@ impl<'db> TrieDBMut<'db> {
 	}
 
 	/// Create a new trie with the backing database `db` and `root`.
-	/// Panics, if `root` does not exist.
+	/// Returns an error if `root` does not exist.
-	// TODO: return Result<Self, TrieError>
+	pub fn from_existing(db: &'db mut HashDB, root: &'db mut H256) -> Result<Self, TrieError> {
-	pub fn from_existing(db: &'db mut HashDB, root: &'db mut H256) -> Self {
 		if !db.exists(root) {
-			flushln!("Trie root not found {}", root);
+			Err(TrieError::InvalidStateRoot)
-			panic!("Trie root not found!");
+		} else {
-		}
+			Ok(TrieDBMut {
-		TrieDBMut {
 				db: db,
 				root: root,
 				hash_count: 0
+			})
 		}
 	}