Refactoring Signer to auto_args + eth_signTransaction (#3261)

* Sign transaction initial

* Refactoring signer to auto_args

rpc/src/v1/helpers/dispatch.rs

@@ -14,84 +14,153 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+use rlp;
 use util::{Address, H256, U256, Uint, Bytes};
 use util::bytes::ToPretty;
+
 use ethkey::Signature;
 use ethcore::miner::MinerService;
 use ethcore::client::MiningBlockChainClient;
 use ethcore::transaction::{Action, SignedTransaction, Transaction};
 use ethcore::account_provider::AccountProvider;
-use jsonrpc_core::{Error, Value, to_value};
-use v1::helpers::TransactionRequest;
-use v1::types::{H256 as RpcH256, H520 as RpcH520, Bytes as RpcBytes};
-use v1::helpers::errors;
+
+use jsonrpc_core::Error;
+use v1::helpers::{errors, TransactionRequest, FilledTransactionRequest, ConfirmationPayload};
+use v1::types::{
+	H256 as RpcH256, H520 as RpcH520, Bytes as RpcBytes,
+	ConfirmationPayload as RpcConfirmationPayload,
+	ConfirmationResponse,
+	SignRequest as RpcSignRequest,
+	DecryptRequest as RpcDecryptRequest,
+};
 
 pub const DEFAULT_MAC: [u8; 2] = [0, 0];
 
-pub fn dispatch_transaction<C, M>(client: &C, miner: &M, signed_transaction: SignedTransaction) -> Result<RpcH256, Error>
-	where C: MiningBlockChainClient, M: MinerService {
-	let hash = RpcH256::from(signed_transaction.hash());
-
-	miner.import_own_transaction(client, signed_transaction)
-		.map_err(errors::from_transaction_error)
-		.map(|_| hash)
+pub fn execute<C, M>(client: &C, miner: &M, accounts: &AccountProvider, payload: ConfirmationPayload, pass: Option<String>) -> Result<ConfirmationResponse, Error>
+	where C: MiningBlockChainClient, M: MinerService
+{
+	match payload {
+		ConfirmationPayload::SendTransaction(request) => {
+			sign_and_dispatch(client, miner, accounts, request, pass)
+				.map(RpcH256::from)
+				.map(ConfirmationResponse::SendTransaction)
+		},
+		ConfirmationPayload::SignTransaction(request) => {
+			sign_no_dispatch(client, miner, accounts, request, pass)
+				.map(|tx| rlp::encode(&tx).to_vec())
+				.map(RpcBytes)
+				.map(ConfirmationResponse::SignTransaction)
+		},
+		ConfirmationPayload::Signature(address, hash) => {
+			signature(accounts, address, hash, pass)
+				.map(RpcH520::from)
+				.map(ConfirmationResponse::Signature)
+		},
+		ConfirmationPayload::Decrypt(address, data) => {
+			decrypt(accounts, address, data, pass)
+				.map(RpcBytes)
+				.map(ConfirmationResponse::Decrypt)
+		},
+	}
 }
 
-fn signature(accounts: &AccountProvider, address: Address, password: Option<String>, hash: H256) -> Result<Signature, Error> {
+fn signature(accounts: &AccountProvider, address: Address, hash: H256, password: Option<String>) -> Result<Signature, Error> {
 	accounts.sign(address, password.clone(), hash).map_err(|e| match password {
 		Some(_) => errors::from_password_error(e),
 		None => errors::from_signing_error(e),
 	})
 }
 
-pub fn sign(accounts: &AccountProvider, address: Address, password: Option<String>, hash: H256) -> Result<Value, Error> {
-	signature(accounts, address, password, hash)
-		.map(RpcH520::from)
-		.map(to_value)
-}
-
-pub fn decrypt(accounts: &AccountProvider, address: Address, password: Option<String>, msg: Bytes) -> Result<Value, Error> {
+fn decrypt(accounts: &AccountProvider, address: Address, msg: Bytes, password: Option<String>) -> Result<Bytes, Error> {
 	accounts.decrypt(address, password.clone(), &DEFAULT_MAC, &msg)
 		.map_err(|e| match password {
 			Some(_) => errors::from_password_error(e),
 			None => errors::from_signing_error(e),
 		})
-		.map(RpcBytes::from)
-		.map(to_value)
 }
 
-pub fn sign_and_dispatch<C, M>(client: &C, miner: &M, accounts: &AccountProvider, request: TransactionRequest, password: Option<String>) -> Result<RpcH256, Error>
+pub fn dispatch_transaction<C, M>(client: &C, miner: &M, signed_transaction: SignedTransaction) -> Result<H256, Error>
+	where C: MiningBlockChainClient, M: MinerService {
+	let hash = signed_transaction.hash();
+
+	miner.import_own_transaction(client, signed_transaction)
+		.map_err(errors::from_transaction_error)
+		.map(|_| hash)
+}
+
+pub fn sign_no_dispatch<C, M>(client: &C, miner: &M, accounts: &AccountProvider, filled: FilledTransactionRequest, password: Option<String>) -> Result<SignedTransaction, Error>
 	where C: MiningBlockChainClient, M: MinerService {
 
 	let network_id = client.signing_network_id();
-	let address = request.from;
+	let address = filled.from;
 	let signed_transaction = {
-		let t = prepare_transaction(client, miner, request);
+		let t = Transaction {
+			nonce: filled.nonce
+				.or_else(|| miner
+					.last_nonce(&filled.from)
+					.map(|nonce| nonce + U256::one()))
+				.unwrap_or_else(|| client.latest_nonce(&filled.from)),
+
+			action: filled.to.map_or(Action::Create, Action::Call),
+			gas: filled.gas,
+			gas_price: filled.gas_price,
+			value: filled.value,
+			data: filled.data,
+		};
+
 		let hash = t.hash(network_id);
-		let signature = try!(signature(accounts, address, password, hash));
+		let signature = try!(signature(accounts, address, hash, password));
 		t.with_signature(signature, network_id)
 	};
+	Ok(signed_transaction)
+}
 
-	trace!(target: "miner", "send_transaction: dispatching tx: {} for network ID {:?}", ::rlp::encode(&signed_transaction).to_vec().pretty(), network_id);
+pub fn sign_and_dispatch<C, M>(client: &C, miner: &M, accounts: &AccountProvider, filled: FilledTransactionRequest, password: Option<String>) -> Result<H256, Error>
+	where C: MiningBlockChainClient, M: MinerService
+{
+
+	let network_id = client.signing_network_id();
+	let signed_transaction = try!(sign_no_dispatch(client, miner, accounts, filled, password));
+
+	trace!(target: "miner", "send_transaction: dispatching tx: {} for network ID {:?}", rlp::encode(&signed_transaction).to_vec().pretty(), network_id);
 	dispatch_transaction(&*client, &*miner, signed_transaction)
 }
 
-fn prepare_transaction<C, M>(client: &C, miner: &M, request: TransactionRequest) -> Transaction where C: MiningBlockChainClient, M: MinerService {
-	Transaction {
-		nonce: request.nonce
-			.or_else(|| miner
-				.last_nonce(&request.from)
-				.map(|nonce| nonce + U256::one()))
-			.unwrap_or_else(|| client.latest_nonce(&request.from)),
-
-		action: request.to.map_or(Action::Create, Action::Call),
-		gas: request.gas.unwrap_or_else(|| miner.sensible_gas_limit()),
+pub fn fill_optional_fields<C, M>(request: TransactionRequest, client: &C, miner: &M) -> FilledTransactionRequest
+	where C: MiningBlockChainClient, M: MinerService
+{
+	FilledTransactionRequest {
+		from: request.from,
+		to: request.to,
+		nonce: request.nonce,
 		gas_price: request.gas_price.unwrap_or_else(|| default_gas_price(client, miner)),
-		value: request.value.unwrap_or_else(U256::zero),
-		data: request.data.map_or_else(Vec::new, |b| b.to_vec()),
+		gas: request.gas.unwrap_or_else(|| miner.sensible_gas_limit()),
+		value: request.value.unwrap_or_else(|| 0.into()),
+		data: request.data.unwrap_or_else(Vec::new),
 	}
 }
 
-pub fn default_gas_price<C, M>(client: &C, miner: &M) -> U256 where C: MiningBlockChainClient, M: MinerService {
+pub fn default_gas_price<C, M>(client: &C, miner: &M) -> U256
+	where C: MiningBlockChainClient, M: MinerService
+{
 	client.gas_price_median(100).unwrap_or_else(|| miner.sensible_gas_price())
 }
+
+pub fn from_rpc<C, M>(payload: RpcConfirmationPayload, client: &C, miner: &M) -> ConfirmationPayload
+	where C: MiningBlockChainClient, M: MinerService {
+
+	match payload {
+		RpcConfirmationPayload::SendTransaction(request) => {
+			ConfirmationPayload::SendTransaction(fill_optional_fields(request.into(), client, miner))
+		},
+		RpcConfirmationPayload::SignTransaction(request) => {
+			ConfirmationPayload::SignTransaction(fill_optional_fields(request.into(), client, miner))
+		},
+		RpcConfirmationPayload::Decrypt(RpcDecryptRequest { address, msg }) => {
+			ConfirmationPayload::Decrypt(address.into(), msg.into())
+		},
+		RpcConfirmationPayload::Signature(RpcSignRequest { address, hash }) => {
+			ConfirmationPayload::Signature(address.into(), hash.into())
+		},
+	}
+}

rpc/src/v1/helpers/requests.rs

@@ -100,9 +100,22 @@ pub struct ConfirmationRequest {
 #[derive(Debug, Clone, Eq, PartialEq, Hash)]
 pub enum ConfirmationPayload {
 	/// Transaction
-	Transaction(FilledTransactionRequest),
+	SendTransaction(FilledTransactionRequest),
+	/// Sign Transaction
+	SignTransaction(FilledTransactionRequest),
 	/// Sign request
-	Sign(Address, H256),
+	Signature(Address, H256),
 	/// Decrypt request
 	Decrypt(Address, Bytes),
 }
+
+impl ConfirmationPayload {
+	pub fn sender(&self) -> Address {
+		match *self {
+			ConfirmationPayload::SendTransaction(ref request) => request.from,
+			ConfirmationPayload::SignTransaction(ref request) => request.from,
+			ConfirmationPayload::Signature(ref address, _) => *address,
+			ConfirmationPayload::Decrypt(ref address, _) => *address,
+		}
+	}
+}

rpc/src/v1/helpers/signing_queue.rs

@@ -21,9 +21,10 @@ use std::collections::BTreeMap;
 use jsonrpc_core;
 use util::{Mutex, RwLock, U256};
 use v1::helpers::{ConfirmationRequest, ConfirmationPayload};
+use v1::types::ConfirmationResponse;
 
 /// Result that can be returned from JSON RPC.
-pub type RpcResult = Result<jsonrpc_core::Value, jsonrpc_core::Error>;
+pub type RpcResult = Result<ConfirmationResponse, jsonrpc_core::Error>;
 
 /// Possible events happening in the queue that can be listened to.
 #[derive(Debug, PartialEq)]
@@ -314,13 +315,12 @@ mod test {
 	use std::time::Duration;
 	use std::thread;
 	use std::sync::{mpsc, Arc};
-	use util::{Address, U256, H256, Mutex};
+	use util::{Address, U256, Mutex};
 	use v1::helpers::{SigningQueue, ConfirmationsQueue, QueueEvent, FilledTransactionRequest, ConfirmationPayload};
-	use v1::types::H256 as NH256;
-	use jsonrpc_core::to_value;
+	use v1::types::ConfirmationResponse;
 
 	fn request() -> ConfirmationPayload {
-		ConfirmationPayload::Transaction(FilledTransactionRequest {
+		ConfirmationPayload::SendTransaction(FilledTransactionRequest {
 			from: Address::from(1),
 			to: Some(Address::from(2)),
 			gas_price: 0.into(),
@@ -353,10 +353,10 @@ mod test {
 			// Just wait for the other thread to start
 			thread::sleep(Duration::from_millis(100));
 		}
-		queue.request_confirmed(id, Ok(to_value(&NH256::from(H256::from(1)))));
+		queue.request_confirmed(id, Ok(ConfirmationResponse::SendTransaction(1.into())));
 
 		// then
-		assert_eq!(handle.join().expect("Thread should finish nicely"), Ok(to_value(&NH256::from(H256::from(1)))));
+		assert_eq!(handle.join().expect("Thread should finish nicely"), Ok(ConfirmationResponse::SendTransaction(1.into())));
 	}
 
 	#[test]

rpc/src/v1/impls/eth.rs

@@ -49,7 +49,7 @@ use v1::types::{
 	H64 as RpcH64, H256 as RpcH256, H160 as RpcH160, U256 as RpcU256,
 };
 use v1::helpers::{CallRequest as CRequest, errors, limit_logs};
-use v1::helpers::dispatch::{default_gas_price, dispatch_transaction};
+use v1::helpers::dispatch::{dispatch_transaction, default_gas_price};
 use v1::helpers::block_import::is_major_importing;
 use v1::helpers::auto_args::Trailing;
 
@@ -610,7 +610,7 @@ impl<C, SN: ?Sized, S: ?Sized, M, EM> Eth for EthClient<C, SN, S, M, EM> where
 
 		let raw_transaction = raw.to_vec();
 		match UntrustedRlp::new(&raw_transaction).as_val() {
-			Ok(signed_transaction) => dispatch_transaction(&*take_weak!(self.client), &*take_weak!(self.miner), signed_transaction),
+			Ok(signed_transaction) => dispatch_transaction(&*take_weak!(self.client), &*take_weak!(self.miner), signed_transaction).map(Into::into),
 			Err(e) => Err(errors::from_rlp_error(e)),
 		}
 	}

rpc/src/v1/impls/personal.rs

@@ -26,7 +26,7 @@ use jsonrpc_core::Error;
 use v1::traits::Personal;
 use v1::types::{H160 as RpcH160, H256 as RpcH256, TransactionRequest};
 use v1::helpers::errors;
-use v1::helpers::dispatch::sign_and_dispatch;
+use v1::helpers::dispatch::{self, sign_and_dispatch};
 
 /// Account management (personal) rpc implementation.
 pub struct PersonalClient<C, M> where C: MiningBlockChainClient, M: MinerService {
@@ -92,13 +92,17 @@ impl<C: 'static, M: 'static> Personal for PersonalClient<C, M> where C: MiningBl
 
 	fn sign_and_send_transaction(&self, request: TransactionRequest, password: String) -> Result<RpcH256, Error> {
 		try!(self.active());
+		let client = take_weak!(self.client);
+		let miner = take_weak!(self.miner);
+		let accounts = take_weak!(self.accounts);
 
+		let request = dispatch::fill_optional_fields(request.into(), &*client, &*miner);
 		sign_and_dispatch(
-			&*take_weak!(self.client),
-			&*take_weak!(self.miner),
-			&*take_weak!(self.accounts),
-			request.into(),
+			&*client,
+			&*miner,
+			&*accounts,
+			request,
 			Some(password)
-		)
+		).map(Into::into)
 	}
 }

rpc/src/v1/impls/signer.rs

@@ -17,14 +17,15 @@
 //! Transactions Confirmations rpc implementation
 
 use std::sync::{Arc, Weak};
+
 use jsonrpc_core::*;
 use ethcore::account_provider::AccountProvider;
 use ethcore::client::MiningBlockChainClient;
 use ethcore::miner::MinerService;
 use v1::traits::Signer;
-use v1::types::{TransactionModification, ConfirmationRequest, U256};
+use v1::types::{TransactionModification, ConfirmationRequest, ConfirmationResponse, U256};
 use v1::helpers::{errors, SignerService, SigningQueue, ConfirmationPayload};
-use v1::helpers::dispatch::{sign_and_dispatch, sign, decrypt};
+use v1::helpers::dispatch;
 
 /// Transactions confirmation (personal) rpc implementation.
 pub struct SignerClient<C, M> where C: MiningBlockChainClient, M: MinerService {
@@ -73,7 +74,7 @@ impl<C: 'static, M: 'static> Signer for SignerClient<C, M> where C: MiningBlockC
 
 	// TODO [ToDr] TransactionModification is redundant for some calls
 	// might be better to replace it in future
-	fn confirm_request(&self, id: U256, modification: TransactionModification, pass: String) -> Result<Value, Error> {
+	fn confirm_request(&self, id: U256, modification: TransactionModification, pass: String) -> Result<ConfirmationResponse, Error> {
 		try!(self.active());
 
 		let id = id.into();
@@ -83,21 +84,16 @@ impl<C: 'static, M: 'static> Signer for SignerClient<C, M> where C: MiningBlockC
 		let miner = take_weak!(self.miner);
 
 		signer.peek(&id).map(|confirmation| {
-			let result = match confirmation.payload {
-				ConfirmationPayload::Transaction(mut request) => {
-					// apply modification
-					if let Some(gas_price) = modification.gas_price {
-						request.gas_price = gas_price.into();
-					}
-					sign_and_dispatch(&*client, &*miner, &*accounts, request.into(), Some(pass)).map(to_value)
+			let mut payload = confirmation.payload.clone();
+			// Modify payload
+			match (&mut payload, modification.gas_price) {
+				(&mut ConfirmationPayload::SendTransaction(ref mut request), Some(gas_price)) => {
+					request.gas_price = gas_price.into();
 				},
-				ConfirmationPayload::Sign(address, hash) => {
-					sign(&*accounts, address, Some(pass), hash)
-				},
-				ConfirmationPayload::Decrypt(address, msg) => {
-					decrypt(&*accounts, address, Some(pass), msg)
-				},
-			};
+				_ => {},
+			}
+			// Execute
+			let result = dispatch::execute(&*client, &*miner, &*accounts, payload, Some(pass));
 			if let Ok(ref response) = result {
 				signer.request_confirmed(id, Ok(response.clone()));
 			}

rpc/src/v1/impls/signing.rs

@@ -17,24 +17,33 @@
 //! Signing RPC implementation.
 
 use std::sync::{Arc, Weak};
+use transient_hashmap::TransientHashMap;
+use util::{U256, Mutex};
 
 use ethcore::account_provider::AccountProvider;
 use ethcore::miner::MinerService;
 use ethcore::client::MiningBlockChainClient;
-use transient_hashmap::TransientHashMap;
-use util::{U256, Address, H256, Mutex};
 
-use jsonrpc_core::*;
-use v1::helpers::{errors, SigningQueue, ConfirmationPromise, ConfirmationResult, ConfirmationPayload, TransactionRequest as TRequest, FilledTransactionRequest as FilledRequest, SignerService};
-use v1::helpers::dispatch::{default_gas_price, sign_and_dispatch, sign, decrypt};
+use jsonrpc_core::Error;
+use v1::helpers::auto_args::Ready;
+use v1::helpers::{
+	errors, dispatch,
+	SigningQueue, ConfirmationPromise, ConfirmationResult, ConfirmationPayload, SignerService
+};
 use v1::traits::{EthSigning, ParitySigning};
-use v1::types::{TransactionRequest, H160 as RpcH160, H256 as RpcH256, U256 as RpcU256, Bytes as RpcBytes};
+use v1::types::{
+	H160 as RpcH160, H256 as RpcH256, U256 as RpcU256, Bytes as RpcBytes, H520 as RpcH520,
+	Either as RpcEither,
+	TransactionRequest as RpcTransactionRequest,
+	ConfirmationPayload as RpcConfirmationPayload,
+	ConfirmationResponse as RpcConfirmationResponse
+};
 
 const MAX_PENDING_DURATION: u64 = 60 * 60;
 
 pub enum DispatchResult {
 	Promise(ConfirmationPromise),
-	Value(Value),
+	Value(RpcConfirmationResponse),
 }
 
 /// Implementation of functions that require signing when no trusted signer is used.
@@ -68,59 +77,41 @@ impl<C, M> SigningQueueClient<C, M> where
 		Ok(())
 	}
 
-	fn add_to_queue<WhenUnlocked, Payload>(&self, sender: Address, when_unlocked: WhenUnlocked, payload: Payload)
-		-> Result<DispatchResult, Error> where
-			WhenUnlocked: Fn(&AccountProvider) -> Result<Value, Error>,
-			Payload: Fn() -> ConfirmationPayload, {
+	fn handle_dispatch<OnResponse>(&self, res: Result<DispatchResult, Error>, on_response: OnResponse)
+		where OnResponse: FnOnce(Result<RpcConfirmationResponse, Error>) + Send + 'static
+	{
+		match res {
+			Ok(DispatchResult::Value(result)) => on_response(Ok(result)),
+			Ok(DispatchResult::Promise(promise)) => {
+				promise.wait_for_result(move |result| {
+					on_response(result.unwrap_or_else(|| Err(errors::request_rejected())))
+				})
+			},
+			Err(e) => on_response(Err(e)),
+		}
+	}
 
+	fn add_to_queue(&self, payload: ConfirmationPayload) -> Result<DispatchResult, Error> {
+		let client = take_weak!(self.client);
+		let miner = take_weak!(self.miner);
 		let accounts = take_weak!(self.accounts);
+
+		let sender = payload.sender();
 		if accounts.is_unlocked(sender) {
-			return when_unlocked(&accounts).map(DispatchResult::Value);
+			return dispatch::execute(&*client, &*miner, &*accounts, payload, None).map(DispatchResult::Value);
 		}
 
-		take_weak!(self.signer).add_request(payload())
+		take_weak!(self.signer).add_request(payload)
 			.map(DispatchResult::Promise)
 			.map_err(|_| errors::request_rejected_limit())
 	}
 
-	fn handle_dispatch(&self, res: Result<DispatchResult, Error>, ready: Ready) {
-		match res {
-			Ok(DispatchResult::Value(v)) => ready.ready(Ok(v)),
-			Ok(DispatchResult::Promise(promise)) => {
-				promise.wait_for_result(move |result| {
-					ready.ready(result.unwrap_or_else(|| Err(errors::request_rejected())))
-				})
-			},
-			Err(e) => ready.ready(Err(e)),
-		}
-	}
+	fn dispatch(&self, payload: RpcConfirmationPayload) -> Result<DispatchResult, Error> {
+		let client = take_weak!(self.client);
+		let miner = take_weak!(self.miner);
 
-	fn dispatch_sign(&self, params: Params) -> Result<DispatchResult, Error> {
-		from_params::<(RpcH160, RpcH256)>(params).and_then(|(address, msg)| {
-			let address: Address = address.into();
-			let msg: H256 = msg.into();
-
-			self.add_to_queue(
-				address,
-				|accounts| sign(accounts, address, None, msg.clone()),
-				|| ConfirmationPayload::Sign(address, msg.clone()),
-			)
-		})
-	}
-
-	fn dispatch_transaction(&self, params: Params) -> Result<DispatchResult, Error> {
-		from_params::<(TransactionRequest, )>(params).and_then(|(request, )| {
-			let request: TRequest = request.into();
-			let (client, miner) = (take_weak!(self.client), take_weak!(self.miner));
-			self.add_to_queue(
-				request.from,
-				|accounts| sign_and_dispatch(&*client, &*miner, accounts, request.clone(), None).map(to_value),
-				|| {
-					let request = fill_optional_fields(request.clone(), &*client, &*miner);
-					ConfirmationPayload::Transaction(request)
-				}
-			)
-		})
+		let payload = dispatch::from_rpc(payload, &*client, &*miner);
+		self.add_to_queue(payload)
 	}
 }
 
@@ -128,62 +119,59 @@ impl<C: 'static, M: 'static> ParitySigning for SigningQueueClient<C, M> where
 	C: MiningBlockChainClient,
 	M: MinerService,
 {
-	fn post_sign(&self, params: Params) -> Result<Value, Error> {
+	fn post_sign(&self, address: RpcH160, hash: RpcH256) -> Result<RpcEither<RpcU256, RpcConfirmationResponse>, Error> {
 		try!(self.active());
-		self.dispatch_sign(params).map(|result| match result {
-			DispatchResult::Value(v) => v,
-			DispatchResult::Promise(promise) => {
-				let id = promise.id();
-				self.pending.lock().insert(id, promise);
-				to_value(&RpcU256::from(id))
-			},
-		})
+		self.dispatch(RpcConfirmationPayload::Signature((address, hash).into()))
+			.map(|result| match result {
+				DispatchResult::Value(v) => RpcEither::Or(v),
+				DispatchResult::Promise(promise) => {
+					let id = promise.id();
+					self.pending.lock().insert(id, promise);
+					RpcEither::Either(id.into())
+				},
+			})
 	}
 
-	fn post_transaction(&self, params: Params) -> Result<Value, Error> {
+	fn post_transaction(&self, request: RpcTransactionRequest) -> Result<RpcEither<RpcU256, RpcConfirmationResponse>, Error> {
 		try!(self.active());
-		self.dispatch_transaction(params).map(|result| match result {
-			DispatchResult::Value(v) => v,
-			DispatchResult::Promise(promise) => {
-				let id = promise.id();
-				self.pending.lock().insert(id, promise);
-				to_value(&RpcU256::from(id))
-			},
-		})
+		self.dispatch(RpcConfirmationPayload::SendTransaction(request))
+			.map(|result| match result {
+				DispatchResult::Value(v) => RpcEither::Or(v),
+				DispatchResult::Promise(promise) => {
+					let id = promise.id();
+					self.pending.lock().insert(id, promise);
+					RpcEither::Either(id.into())
+				},
+			})
 	}
 
-	fn check_request(&self, params: Params) -> Result<Value, Error> {
+	fn check_request(&self, id: RpcU256) -> Result<Option<RpcConfirmationResponse>, Error> {
 		try!(self.active());
 		let mut pending = self.pending.lock();
-		from_params::<(RpcU256, )>(params).and_then(|(id, )| {
-			let id: U256 = id.into();
-			let res = match pending.get(&id) {
-				Some(ref promise) => match promise.result() {
-					ConfirmationResult::Waiting => { return Ok(Value::Null); }
-					ConfirmationResult::Rejected => Err(errors::request_rejected()),
-					ConfirmationResult::Confirmed(rpc_response) => rpc_response,
-				},
-				_ => { return Err(errors::request_not_found()); }
-			};
-			pending.remove(&id);
-			res
-		})
+		let id: U256 = id.into();
+		let res = match pending.get(&id) {
+			Some(ref promise) => match promise.result() {
+				ConfirmationResult::Waiting => { return Ok(None); }
+				ConfirmationResult::Rejected => Err(errors::request_rejected()),
+				ConfirmationResult::Confirmed(rpc_response) => rpc_response.map(Some),
+			},
+			_ => { return Err(errors::request_not_found()); }
+		};
+		pending.remove(&id);
+		res
 	}
 
-	fn decrypt_message(&self, params: Params, ready: Ready) {
+	fn decrypt_message(&self, ready: Ready<RpcBytes>, address: RpcH160, data: RpcBytes) {
 		let res = self.active()
-			.and_then(|_| from_params::<(RpcH160, RpcBytes)>(params))
-			.and_then(|(address, msg)| {
-				let address: Address = address.into();
-
-				self.add_to_queue(
-					address,
-					|accounts| decrypt(accounts, address, None, msg.clone().into()),
-					|| ConfirmationPayload::Decrypt(address, msg.clone().into())
-				)
-			});
-
-		self.handle_dispatch(res, ready);
+			.and_then(|_| self.dispatch(RpcConfirmationPayload::Decrypt((address, data).into())));
+		// TODO [todr] typed handle_dispatch
+		self.handle_dispatch(res, |response| {
+			match response {
+				Ok(RpcConfirmationResponse::Decrypt(data)) => ready.ready(Ok(data)),
+				Err(e) => ready.ready(Err(e)),
+				e => ready.ready(Err(errors::internal("Unexpected result.", e))),
+			}
+		});
 	}
 }
 
@@ -191,26 +179,36 @@ impl<C: 'static, M: 'static> EthSigning for SigningQueueClient<C, M> where
 	C: MiningBlockChainClient,
 	M: MinerService,
 {
-	fn sign(&self, params: Params, ready: Ready) {
-		let res = self.active().and_then(|_| self.dispatch_sign(params));
-		self.handle_dispatch(res, ready);
+	fn sign(&self, ready: Ready<RpcH520>, address: RpcH160, hash: RpcH256) {
+		let res = self.active().and_then(|_| self.dispatch(RpcConfirmationPayload::Signature((address, hash).into())));
+		self.handle_dispatch(res, |response| {
+			match response {
+				Ok(RpcConfirmationResponse::Signature(signature)) => ready.ready(Ok(signature)),
+				Err(e) => ready.ready(Err(e)),
+				e => ready.ready(Err(errors::internal("Unexpected result.", e))),
+			}
+		});
 	}
 
-	fn send_transaction(&self, params: Params, ready: Ready) {
-		let res = self.active().and_then(|_| self.dispatch_transaction(params));
-		self.handle_dispatch(res, ready);
+	fn send_transaction(&self, ready: Ready<RpcH256>, request: RpcTransactionRequest) {
+		let res = self.active().and_then(|_| self.dispatch(RpcConfirmationPayload::SendTransaction(request)));
+		self.handle_dispatch(res, |response| {
+			match response {
+				Ok(RpcConfirmationResponse::SendTransaction(hash)) => ready.ready(Ok(hash)),
+				Err(e) => ready.ready(Err(e)),
+				e => ready.ready(Err(errors::internal("Unexpected result.", e))),
+			}
+		});
 	}
-}
 
-fn fill_optional_fields<C, M>(request: TRequest, client: &C, miner: &M) -> FilledRequest
-	where C: MiningBlockChainClient, M: MinerService {
-	FilledRequest {
-		from: request.from,
-		to: request.to,
-		nonce: request.nonce,
-		gas_price: request.gas_price.unwrap_or_else(|| default_gas_price(client, miner)),
-		gas: request.gas.unwrap_or_else(|| miner.sensible_gas_limit()),
-		value: request.value.unwrap_or_else(|| 0.into()),
-		data: request.data.unwrap_or_else(Vec::new),
+	fn sign_transaction(&self, ready: Ready<RpcBytes>, request: RpcTransactionRequest) {
+		let res = self.active().and_then(|_| self.dispatch(RpcConfirmationPayload::SignTransaction(request)));
+		self.handle_dispatch(res, |response| {
+			match response {
+				Ok(RpcConfirmationResponse::SignTransaction(rlp)) => ready.ready(Ok(rlp)),
+				Err(e) => ready.ready(Err(e)),
+				e => ready.ready(Err(errors::internal("Unexpected result.", e))),
+			}
+		});
 	}
 }

rpc/src/v1/impls/signing_unsafe.rs

@@ -22,11 +22,19 @@ use ethcore::account_provider::AccountProvider;
 use ethcore::miner::MinerService;
 use ethcore::client::MiningBlockChainClient;
 
-use jsonrpc_core::*;
+use jsonrpc_core::Error;
+use v1::helpers::auto_args::Ready;
 use v1::helpers::errors;
-use v1::helpers::dispatch::{sign_and_dispatch, sign, decrypt};
+use v1::helpers::dispatch;
 use v1::traits::{EthSigning, ParitySigning};
-use v1::types::{TransactionRequest, H160 as RpcH160, H256 as RpcH256, Bytes as RpcBytes};
+use v1::types::{
+	U256 as RpcU256,
+	H160 as RpcH160, H256 as RpcH256, H520 as RpcH520, Bytes as RpcBytes,
+	Either as RpcEither,
+	TransactionRequest as RpcTransactionRequest,
+	ConfirmationPayload as RpcConfirmationPayload,
+	ConfirmationResponse as RpcConfirmationResponse,
+};
 
 /// Implementation of functions that require signing when no trusted signer is used.
 pub struct SigningUnsafeClient<C, M> where
@@ -58,26 +66,47 @@ impl<C, M> SigningUnsafeClient<C, M> where
 		take_weak!(self.client).keep_alive();
 		Ok(())
 	}
+
+	fn handle(&self, payload: RpcConfirmationPayload) -> Result<RpcConfirmationResponse, Error> {
+		try!(self.active());
+		let client = take_weak!(self.client);
+		let miner = take_weak!(self.miner);
+		let accounts = take_weak!(self.accounts);
+
+		let payload = dispatch::from_rpc(payload, &*client, &*miner);
+		dispatch::execute(&*client, &*miner, &*accounts, payload, None)
+	}
 }
 
 impl<C: 'static, M: 'static> EthSigning for SigningUnsafeClient<C, M> where
 	C: MiningBlockChainClient,
 	M: MinerService,
 {
-	fn sign(&self, params: Params, ready: Ready) {
-		ready.ready(self.active()
-			.and_then(|_| from_params::<(RpcH160, RpcH256)>(params))
-			.and_then(|(address, msg)| {
-				sign(&*take_weak!(self.accounts), address.into(), None, msg.into())
-			}))
+	fn sign(&self, ready: Ready<RpcH520>, address: RpcH160, hash: RpcH256) {
+		let result = match self.handle(RpcConfirmationPayload::Signature((address, hash).into())) {
+			Ok(RpcConfirmationResponse::Signature(signature)) => Ok(signature),
+			Err(e) => Err(e),
+			e => Err(errors::internal("Unexpected result", e)),
+		};
+		ready.ready(result);
 	}
 
-	fn send_transaction(&self, params: Params, ready: Ready) {
-		ready.ready(self.active()
-			.and_then(|_| from_params::<(TransactionRequest, )>(params))
-			.and_then(|(request, )| {
-				sign_and_dispatch(&*take_weak!(self.client), &*take_weak!(self.miner), &*take_weak!(self.accounts), request.into(), None).map(to_value)
-			}))
+	fn send_transaction(&self, ready: Ready<RpcH256>, request: RpcTransactionRequest) {
+		let result = match self.handle(RpcConfirmationPayload::SendTransaction(request)) {
+			Ok(RpcConfirmationResponse::SendTransaction(hash)) => Ok(hash),
+			Err(e) => Err(e),
+			e => Err(errors::internal("Unexpected result", e)),
+		};
+		ready.ready(result);
+	}
+
+	fn sign_transaction(&self, ready: Ready<RpcBytes>, request: RpcTransactionRequest) {
+		let result = match self.handle(RpcConfirmationPayload::SignTransaction(request)) {
+			Ok(RpcConfirmationResponse::SignTransaction(rlp)) => Ok(rlp),
+			Err(e) => Err(e),
+			e => Err(errors::internal("Unexpected result", e)),
+		};
+		ready.ready(result);
 	}
 }
 
@@ -85,25 +114,26 @@ impl<C: 'static, M: 'static> ParitySigning for SigningUnsafeClient<C, M> where
 	C: MiningBlockChainClient,
 	M: MinerService,
 {
-	fn decrypt_message(&self, params: Params, ready: Ready) {
-		ready.ready(self.active()
-			.and_then(|_| from_params::<(RpcH160, RpcBytes)>(params))
-			.and_then(|(address, ciphertext)| {
-				decrypt(&*take_weak!(self.accounts), address.into(), None, ciphertext.0)
-			}))
+	fn decrypt_message(&self, ready: Ready<RpcBytes>, address: RpcH160, data: RpcBytes) {
+		let result = match self.handle(RpcConfirmationPayload::Decrypt((address, data).into())) {
+			Ok(RpcConfirmationResponse::Decrypt(data)) => Ok(data),
+			Err(e) => Err(e),
+			e => Err(errors::internal("Unexpected result", e)),
+		};
+		ready.ready(result);
 	}
 
-	fn post_sign(&self, _: Params) -> Result<Value, Error> {
+	fn post_sign(&self, _: RpcH160, _: RpcH256) -> Result<RpcEither<RpcU256, RpcConfirmationResponse>, Error> {
 		// We don't support this in non-signer mode.
 		Err(errors::signer_disabled())
 	}
 
-	fn post_transaction(&self, _: Params) -> Result<Value, Error> {
+	fn post_transaction(&self, _: RpcTransactionRequest) -> Result<RpcEither<RpcU256, RpcConfirmationResponse>, Error> {
 		// We don't support this in non-signer mode.
 		Err(errors::signer_disabled())
 	}
 
-	fn check_request(&self, _: Params) -> Result<Value, Error> {
+	fn check_request(&self, _: RpcU256) -> Result<Option<RpcConfirmationResponse>, Error> {
 		// We don't support this in non-signer mode.
 		Err(errors::signer_disabled())
 	}

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

@@ -18,6 +18,7 @@ use std::str::FromStr;
 use std::collections::HashMap;
 use std::sync::Arc;
 use std::time::{Instant, Duration};
+use rlp;
 use jsonrpc_core::IoHandler;
 use util::{Uint, U256, Address, H256, FixedHash, Mutex};
 use ethcore::account_provider::AccountProvider;
@@ -761,6 +762,44 @@ fn rpc_eth_send_transaction() {
 
 	assert_eq!(tester.io.handle_request_sync(&request), Some(response));
 }
+
+#[test]
+fn rpc_eth_sign_transaction() {
+	let tester = EthTester::default();
+	let address = tester.accounts_provider.new_account("").unwrap();
+	tester.accounts_provider.unlock_account_permanently(address, "".into()).unwrap();
+	let request = r#"{
+		"jsonrpc": "2.0",
+		"method": "eth_signTransaction",
+		"params": [{
+			"from": ""#.to_owned() + format!("0x{:?}", address).as_ref() + r#"",
+			"to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
+			"gas": "0x76c0",
+			"gasPrice": "0x9184e72a000",
+			"value": "0x9184e72a"
+		}],
+		"id": 1
+	}"#;
+
+	let t = Transaction {
+		nonce: U256::one(),
+		gas_price: U256::from(0x9184e72a000u64),
+		gas: U256::from(0x76c0),
+		action: Action::Call(Address::from_str("d46e8dd67c5d32be8058bb8eb970870f07244567").unwrap()),
+		value: U256::from(0x9184e72au64),
+		data: vec![]
+	};
+	let signature = tester.accounts_provider.sign(address, None, t.hash(None)).unwrap();
+	let t = t.with_signature(signature, None);
+	let rlp = rlp::encode(&t);
+
+	let response = r#"{"jsonrpc":"2.0","result":"0x"#.to_owned() + &rlp.to_hex() + r#"","id":1}"#;
+
+	tester.miner.last_nonces.write().insert(address.clone(), U256::zero());
+
+	assert_eq!(tester.io.handle_request_sync(&request), Some(response));
+}
+
 #[test]
 fn rpc_eth_send_transaction_with_bad_to() {
 	let tester = EthTester::default();
@@ -839,7 +878,7 @@ fn rpc_eth_send_raw_transaction() {
 	let signature = tester.accounts_provider.sign(address, None, t.hash(None)).unwrap();
 	let t = t.with_signature(signature, None);
 
-	let rlp = ::rlp::encode(&t).to_vec().to_hex();
+	let rlp = rlp::encode(&t).to_vec().to_hex();
 
 	let req = r#"{
 		"jsonrpc": "2.0",

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

@@ -71,7 +71,7 @@ fn signer_tester() -> SignerTester {
 fn should_return_list_of_items_to_confirm() {
 	// given
 	let tester = signer_tester();
-	tester.signer.add_request(ConfirmationPayload::Transaction(FilledTransactionRequest {
+	tester.signer.add_request(ConfirmationPayload::SendTransaction(FilledTransactionRequest {
 		from: Address::from(1),
 		to: Some(Address::from_str("d46e8dd67c5d32be8058bb8eb970870f07244567").unwrap()),
 		gas_price: U256::from(10_000),
@@ -80,7 +80,7 @@ fn should_return_list_of_items_to_confirm() {
 		data: vec![],
 		nonce: None,
 	})).unwrap();
-	tester.signer.add_request(ConfirmationPayload::Sign(1.into(), 5.into())).unwrap();
+	tester.signer.add_request(ConfirmationPayload::Signature(1.into(), 5.into())).unwrap();
 
 	// when
 	let request = r#"{"jsonrpc":"2.0","method":"signer_requestsToConfirm","params":[],"id":1}"#;
@@ -100,7 +100,7 @@ fn should_return_list_of_items_to_confirm() {
 fn should_reject_transaction_from_queue_without_dispatching() {
 	// given
 	let tester = signer_tester();
-	tester.signer.add_request(ConfirmationPayload::Transaction(FilledTransactionRequest {
+	tester.signer.add_request(ConfirmationPayload::SendTransaction(FilledTransactionRequest {
 		from: Address::from(1),
 		to: Some(Address::from_str("d46e8dd67c5d32be8058bb8eb970870f07244567").unwrap()),
 		gas_price: U256::from(10_000),
@@ -125,7 +125,7 @@ fn should_reject_transaction_from_queue_without_dispatching() {
 fn should_not_remove_transaction_if_password_is_invalid() {
 	// given
 	let tester = signer_tester();
-	tester.signer.add_request(ConfirmationPayload::Transaction(FilledTransactionRequest {
+	tester.signer.add_request(ConfirmationPayload::SendTransaction(FilledTransactionRequest {
 		from: Address::from(1),
 		to: Some(Address::from_str("d46e8dd67c5d32be8058bb8eb970870f07244567").unwrap()),
 		gas_price: U256::from(10_000),
@@ -149,7 +149,7 @@ fn should_not_remove_transaction_if_password_is_invalid() {
 fn should_not_remove_sign_if_password_is_invalid() {
 	// given
 	let tester = signer_tester();
-	tester.signer.add_request(ConfirmationPayload::Sign(0.into(), 5.into())).unwrap();
+	tester.signer.add_request(ConfirmationPayload::Signature(0.into(), 5.into())).unwrap();
 	assert_eq!(tester.signer.requests().len(), 1);
 
 	// when
@@ -167,7 +167,7 @@ fn should_confirm_transaction_and_dispatch() {
 	let tester = signer_tester();
 	let address = tester.accounts.new_account("test").unwrap();
 	let recipient = Address::from_str("d46e8dd67c5d32be8058bb8eb970870f07244567").unwrap();
-	tester.signer.add_request(ConfirmationPayload::Transaction(FilledTransactionRequest {
+	tester.signer.add_request(ConfirmationPayload::SendTransaction(FilledTransactionRequest {
 		from: address,
 		to: Some(recipient),
 		gas_price: U256::from(10_000),

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

@@ -16,15 +16,17 @@
 
 use std::str::FromStr;
 use std::sync::Arc;
-use jsonrpc_core::{IoHandler, to_value, Success};
+use rlp;
+
+use jsonrpc_core::{IoHandler, Success};
 use v1::impls::SigningQueueClient;
 use v1::traits::{EthSigning, ParitySigning, Parity};
 use v1::helpers::{SignerService, SigningQueue};
-use v1::types::{H256 as RpcH256, H520 as RpcH520, Bytes};
+use v1::types::ConfirmationResponse;
 use v1::tests::helpers::TestMinerService;
 use v1::tests::mocked::parity;
 
-use util::{Address, FixedHash, Uint, U256, H256, H520};
+use util::{Address, FixedHash, Uint, U256, H256, ToPretty};
 use ethcore::account_provider::AccountProvider;
 use ethcore::client::TestBlockChainClient;
 use ethcore::transaction::{Transaction, Action};
@@ -88,7 +90,7 @@ fn should_add_sign_to_queue() {
 	let async_result = tester.io.handle_request(&request).unwrap();
 	assert_eq!(tester.signer.requests().len(), 1);
 	// respond
-	tester.signer.request_confirmed(U256::from(1), Ok(to_value(&RpcH520::from(H520::default()))));
+	tester.signer.request_confirmed(1.into(), Ok(ConfirmationResponse::Signature(0.into())));
 	assert!(async_result.on_result(move |res| {
 		assert_eq!(res, response.to_owned());
 	}));
@@ -162,7 +164,7 @@ fn should_check_status_of_request_when_its_resolved() {
 		"id": 1
 	}"#;
 	tester.io.handle_request_sync(&request).expect("Sent");
-	tester.signer.request_confirmed(U256::from(1), Ok(to_value(&"Hello World!")));
+	tester.signer.request_confirmed(1.into(), Ok(ConfirmationResponse::Signature(1.into())));
 
 	// when
 	let request = r#"{
@@ -171,7 +173,7 @@ fn should_check_status_of_request_when_its_resolved() {
 		"params": ["0x1"],
 		"id": 1
 	}"#;
-	let response = r#"{"jsonrpc":"2.0","result":"Hello World!","id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001","id":1}"#;
 
 	// then
 	assert_eq!(tester.io.handle_request_sync(&request), Some(response.to_owned()));
@@ -228,7 +230,54 @@ fn should_add_transaction_to_queue() {
 	let async_result = tester.io.handle_request(&request).unwrap();
 	assert_eq!(tester.signer.requests().len(), 1);
 	// respond
-	tester.signer.request_confirmed(U256::from(1), Ok(to_value(&RpcH256::from(H256::default()))));
+	tester.signer.request_confirmed(1.into(), Ok(ConfirmationResponse::SendTransaction(0.into())));
+	assert!(async_result.on_result(move |res| {
+		assert_eq!(res, response.to_owned());
+	}));
+}
+
+#[test]
+fn should_add_sign_transaction_to_the_queue() {
+	// given
+	let tester = eth_signing();
+	let address = tester.accounts.new_account("test").unwrap();
+
+	assert_eq!(tester.signer.requests().len(), 0);
+
+	// when
+	let request = r#"{
+		"jsonrpc": "2.0",
+		"method": "eth_signTransaction",
+		"params": [{
+			"from": ""#.to_owned() + format!("0x{:?}", address).as_ref() + r#"",
+			"to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
+			"gas": "0x76c0",
+			"gasPrice": "0x9184e72a000",
+			"value": "0x9184e72a"
+		}],
+		"id": 1
+	}"#;
+
+	let t = Transaction {
+		nonce: U256::one(),
+		gas_price: U256::from(0x9184e72a000u64),
+		gas: U256::from(0x76c0),
+		action: Action::Call(Address::from_str("d46e8dd67c5d32be8058bb8eb970870f07244567").unwrap()),
+		value: U256::from(0x9184e72au64),
+		data: vec![]
+	};
+	let signature = tester.accounts.sign(address, Some("test".into()), t.hash(None)).unwrap();
+	let t = t.with_signature(signature, None);
+	let rlp = rlp::encode(&t);
+
+	let response = r#"{"jsonrpc":"2.0","result":"0x"#.to_owned() + &rlp.to_hex() + r#"","id":1}"#;
+
+	// then
+	tester.miner.last_nonces.write().insert(address.clone(), U256::zero());
+	let async_result = tester.io.handle_request(&request).unwrap();
+	assert_eq!(tester.signer.requests().len(), 1);
+	// respond
+	tester.signer.request_confirmed(1.into(), Ok(ConfirmationResponse::SignTransaction(rlp.to_vec().into())));
 	assert!(async_result.on_result(move |res| {
 		assert_eq!(res, response.to_owned());
 	}));
@@ -325,7 +374,7 @@ fn should_add_decryption_to_the_queue() {
 	let async_result = tester.io.handle_request(&request).unwrap();
 	assert_eq!(tester.signer.requests().len(), 1);
 	// respond
-	tester.signer.request_confirmed(U256::from(1), Ok(to_value(Bytes(vec![0x1, 0x2]))));
+	tester.signer.request_confirmed(1.into(), Ok(ConfirmationResponse::Decrypt(vec![0x1, 0x2].into())));
 	assert!(async_result.on_result(move |res| {
 		assert_eq!(res, response.to_owned());
 	}));

rpc/src/v1/traits/eth.rs

@@ -15,7 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 //! Eth rpc interface.
-use jsonrpc_core::*;
+use jsonrpc_core::Error;
 
 use v1::types::{RichBlock, BlockNumber, Bytes, CallRequest, Filter, FilterChanges, Index};
 use v1::types::{Log, Receipt, SyncStatus, Transaction, Work};

rpc/src/v1/traits/eth_signing.rs

@@ -15,26 +15,27 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 //! Eth rpc interface.
-use std::sync::Arc;
-use jsonrpc_core::*;
 
-/// Signing methods implementation relying on unlocked accounts.
-pub trait EthSigning: Sized + Send + Sync + 'static {
-	/// Signs the data with given address signature.
-	fn sign(&self, _: Params, _: Ready);
+use v1::helpers::auto_args::{WrapAsync, Ready};
+use v1::types::{H160, H256, H520, TransactionRequest, Bytes};
 
-	/// Sends transaction; will block for 20s to try to return the
-	/// transaction hash.
-	/// If it cannot yet be signed, it will return a transaction ID for
-	/// later use with check_transaction.
-	fn send_transaction(&self, _: Params, _: Ready);
+build_rpc_trait! {
+	/// Signing methods implementation relying on unlocked accounts.
+	pub trait EthSigning {
+		/// Signs the data with given address signature.
+		#[rpc(async, name = "eth_sign")]
+		fn sign(&self, Ready<H520>, H160, H256);
 
-	/// 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_async_method("eth_sign", EthSigning::sign);
-		delegate.add_async_method("eth_sendTransaction", EthSigning::send_transaction);
+		/// Sends transaction; will block waiting for signer to return the
+		/// transaction hash.
+		/// If Signer is disable it will require the account to be unlocked.
+		#[rpc(async, name = "eth_sendTransaction")]
+		fn send_transaction(&self, Ready<H256>, TransactionRequest);
 
-		delegate
+		/// Signs transactions without dispatching it to the network.
+		/// Returns signed transaction RLP representation.
+		/// It can be later submitted using `eth_sendRawTransaction`.
+		#[rpc(async, name = "eth_signTransaction")]
+		fn sign_transaction(&self, Ready<Bytes>, TransactionRequest);
 	}
 }

rpc/src/v1/traits/parity_signing.rs

@@ -15,38 +15,32 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 //! ParitySigning rpc interface.
-use std::sync::Arc;
-use jsonrpc_core::*;
+use jsonrpc_core::Error;
 
-/// Signing methods implementation relying on unlocked accounts.
-pub trait ParitySigning: Sized + Send + Sync + 'static {
-	/// Posts sign request asynchronously.
-	/// Will return a confirmation ID for later use with check_transaction.
-	fn post_sign(&self, _: Params) -> Result<Value, Error>;
+use v1::helpers::auto_args::{Wrap, WrapAsync, Ready};
+use v1::types::{U256, H160, H256, Bytes, ConfirmationResponse, TransactionRequest, Either};
 
-	/// Posts transaction asynchronously.
-	/// Will return a transaction ID for later use with check_transaction.
-	fn post_transaction(&self, _: Params) -> Result<Value, Error>;
+build_rpc_trait! {
+	/// Signing methods implementation.
+	pub trait ParitySigning {
+		/// Posts sign request asynchronously.
+		/// Will return a confirmation ID for later use with check_transaction.
+		#[rpc(name = "parity_postSign")]
+		fn post_sign(&self, H160, H256) -> Result<Either<U256, ConfirmationResponse>, Error>;
 
-	/// Checks the progress of a previously posted request (transaction/sign).
-	/// Should be given a valid send_transaction ID.
-	/// Returns the transaction hash, the zero hash (not yet available),
-	/// or the signature,
-	/// or an error.
-	fn check_request(&self, _: Params) -> Result<Value, Error>;
+		/// Posts transaction asynchronously.
+		/// Will return a transaction ID for later use with check_transaction.
+		#[rpc(name = "parity_postTransaction")]
+		fn post_transaction(&self, TransactionRequest) -> Result<Either<U256, ConfirmationResponse>, Error>;
 
-	/// Decrypt some ECIES-encrypted message.
-	/// First parameter is the address with which it is encrypted, second is the ciphertext.
-	fn decrypt_message(&self, _: Params, _: Ready);
+		/// Checks the progress of a previously posted request (transaction/sign).
+		/// Should be given a valid send_transaction ID.
+		#[rpc(name = "parity_checkRequest")]
+		fn check_request(&self, U256) -> Result<Option<ConfirmationResponse>, 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("parity_postSign", ParitySigning::post_sign);
-		delegate.add_method("parity_postTransaction", ParitySigning::post_transaction);
-		delegate.add_method("parity_checkRequest", ParitySigning::check_request);
-		delegate.add_async_method("parity_decryptMessage", ParitySigning::decrypt_message);
-
-		delegate
+		/// Decrypt some ECIES-encrypted message.
+		/// First parameter is the address with which it is encrypted, second is the ciphertext.
+		#[rpc(async, name = "parity_decryptMessage")]
+		fn decrypt_message(&self, Ready<Bytes>, H160, Bytes);
 	}
 }

rpc/src/v1/traits/signer.rs

@@ -15,10 +15,10 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 //! Parity Signer-related rpc interface.
-use jsonrpc_core::{Value, Error};
+use jsonrpc_core::Error;
 
 use v1::helpers::auto_args::Wrap;
-use v1::types::{U256, TransactionModification, ConfirmationRequest};
+use v1::types::{U256, TransactionModification, ConfirmationRequest, ConfirmationResponse};
 
 
 build_rpc_trait! {
@@ -31,7 +31,7 @@ build_rpc_trait! {
 
 		/// Confirm specific request.
 		#[rpc(name = "signer_confirmRequest")]
-		fn confirm_request(&self, U256, TransactionModification, String) -> Result<Value, Error>;
+		fn confirm_request(&self, U256, TransactionModification, String) -> Result<ConfirmationResponse, Error>;
 
 		/// Reject the confirmation request.
 		#[rpc(name = "signer_rejectRequest")]

rpc/src/v1/types/confirmations.rs

@@ -16,10 +16,11 @@
 
 //! Types used in Confirmations queue (Trusted Signer)
 
-use v1::types::{U256, TransactionRequest, H160, H256, Bytes};
+use std::fmt;
+use serde::{Serialize, Serializer};
+use v1::types::{U256, TransactionRequest, H160, H256, H520, Bytes};
 use v1::helpers;
 
-
 /// Confirmation waiting in a queue
 #[derive(Debug, Clone, Eq, PartialEq, Hash, Serialize)]
 pub struct ConfirmationRequest {
@@ -47,6 +48,15 @@ pub struct SignRequest {
 	pub hash: H256,
 }
 
+impl From<(H160, H256)> for SignRequest {
+	fn from(tuple: (H160, H256)) -> Self {
+		SignRequest {
+			address: tuple.0,
+			hash: tuple.1,
+		}
+	}
+}
+
 /// Decrypt request
 #[derive(Debug, Clone, Eq, PartialEq, Hash, Serialize)]
 pub struct DecryptRequest {
@@ -56,15 +66,53 @@ pub struct DecryptRequest {
 	pub msg: Bytes,
 }
 
+impl From<(H160, Bytes)> for DecryptRequest {
+	fn from(tuple: (H160, Bytes)) -> Self {
+		DecryptRequest {
+			address: tuple.0,
+			msg: tuple.1,
+		}
+	}
+}
+
+/// Confirmation response for particular payload
+#[derive(Debug, Clone, Eq, PartialEq, Hash)]
+pub enum ConfirmationResponse {
+	/// Transaction Hash
+	SendTransaction(H256),
+	/// Transaction RLP
+	SignTransaction(Bytes),
+	/// Signature
+	Signature(H520),
+	/// Decrypted data
+	Decrypt(Bytes),
+}
+
+impl Serialize for ConfirmationResponse {
+	fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+		where S: Serializer
+	{
+		match *self {
+			ConfirmationResponse::SendTransaction(ref hash) => hash.serialize(serializer),
+			ConfirmationResponse::SignTransaction(ref rlp) => rlp.serialize(serializer),
+			ConfirmationResponse::Signature(ref signature) => signature.serialize(serializer),
+			ConfirmationResponse::Decrypt(ref data) => data.serialize(serializer),
+		}
+	}
+}
+
 /// Confirmation payload, i.e. the thing to be confirmed
 #[derive(Debug, Clone, Eq, PartialEq, Hash, Serialize)]
 pub enum ConfirmationPayload {
-	/// Transaction
+	/// Send Transaction
 	#[serde(rename="transaction")]
-	Transaction(TransactionRequest),
+	SendTransaction(TransactionRequest),
+	/// Sign Transaction
+	#[serde(rename="transaction")]
+	SignTransaction(TransactionRequest),
 	/// Signature
 	#[serde(rename="sign")]
-	Sign(SignRequest),
+	Signature(SignRequest),
 	/// Decryption
 	#[serde(rename="decrypt")]
 	Decrypt(DecryptRequest),
@@ -73,8 +121,9 @@ pub enum ConfirmationPayload {
 impl From<helpers::ConfirmationPayload> for ConfirmationPayload {
 	fn from(c: helpers::ConfirmationPayload) -> Self {
 		match c {
-			helpers::ConfirmationPayload::Transaction(t) => ConfirmationPayload::Transaction(t.into()),
-			helpers::ConfirmationPayload::Sign(address, hash) => ConfirmationPayload::Sign(SignRequest {
+			helpers::ConfirmationPayload::SendTransaction(t) => ConfirmationPayload::SendTransaction(t.into()),
+			helpers::ConfirmationPayload::SignTransaction(t) => ConfirmationPayload::SignTransaction(t.into()),
+			helpers::ConfirmationPayload::Signature(address, hash) => ConfirmationPayload::Signature(SignRequest {
 				address: address.into(),
 				hash: hash.into(),
 			}),
@@ -94,6 +143,41 @@ pub struct TransactionModification {
 	pub gas_price: Option<U256>,
 }
 
+/// Represents two possible return values.
+#[derive(Debug, Clone)]
+pub enum Either<A, B> where
+	A: fmt::Debug + Clone,
+	B: fmt::Debug + Clone,
+{
+	/// Primary value
+	Either(A),
+	/// Secondary value
+	Or(B),
+}
+
+impl<A, B> From<A> for Either<A, B> where
+	A: fmt::Debug + Clone,
+	B: fmt::Debug + Clone,
+{
+	fn from(a: A) -> Self {
+		Either::Either(a)
+	}
+}
+
+impl<A, B> Serialize for Either<A, B>  where
+	A: Serialize + fmt::Debug + Clone,
+	B: Serialize + fmt::Debug + Clone,
+{
+	fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+		where S: Serializer
+	{
+		match *self {
+			Either::Either(ref a) => a.serialize(serializer),
+			Either::Or(ref b) => b.serialize(serializer),
+		}
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use std::str::FromStr;
@@ -107,7 +191,7 @@ mod tests {
 		// given
 		let request = helpers::ConfirmationRequest {
 			id: 15.into(),
-			payload: helpers::ConfirmationPayload::Sign(1.into(), 5.into()),
+			payload: helpers::ConfirmationPayload::Signature(1.into(), 5.into()),
 		};
 
 		// when
@@ -123,7 +207,7 @@ mod tests {
 		// given
 		let request = helpers::ConfirmationRequest {
 			id: 15.into(),
-			payload: helpers::ConfirmationPayload::Transaction(helpers::FilledTransactionRequest {
+			payload: helpers::ConfirmationPayload::SendTransaction(helpers::FilledTransactionRequest {
 				from: 0.into(),
 				to: None,
 				gas: 15_000.into(),

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

@@ -38,7 +38,7 @@ pub use self::bytes::Bytes;
 pub use self::block::{RichBlock, Block, BlockTransactions};
 pub use self::block_number::BlockNumber;
 pub use self::call_request::CallRequest;
-pub use self::confirmations::{ConfirmationPayload, ConfirmationRequest, TransactionModification};
+pub use self::confirmations::{ConfirmationPayload, ConfirmationRequest, ConfirmationResponse, TransactionModification, SignRequest, DecryptRequest, Either};
 pub use self::filter::{Filter, FilterChanges};
 pub use self::hash::{H64, H160, H256, H512, H520, H2048};
 pub use self::index::Index;