only use engineclient trait for engines, separated from client trait

ethcore/src/client/client.rs

@@ -37,7 +37,7 @@ use client::ancient_import::AncientVerifier;
 use client::Error as ClientError;
 use client::{
 	BlockId, TransactionId, UncleId, TraceId, ClientConfig, BlockChainClient,
-	MiningBlockChainClient, EngineClient, TraceFilter, CallAnalytics, BlockImportError, Mode,
+	MiningBlockChainClient, TraceFilter, CallAnalytics, BlockImportError, Mode,
 	ChainNotify, PruningInfo, ProvingBlockChainClient,
 };
 use encoded;
@@ -1852,7 +1852,7 @@ impl MiningBlockChainClient for Client {
 	}
 }
 
-impl EngineClient for Client {
+impl super::traits::EngineClient for Client {
 	fn update_sealing(&self) {
 		self.miner.update_sealing(self)
 	}
@@ -1870,6 +1870,22 @@ impl EngineClient for Client {
 	fn epoch_transition_for(&self, parent_hash: H256) -> Option<::engines::EpochTransition> {
 		self.chain.read().epoch_transition_for(parent_hash)
 	}
+
+	fn chain_info(&self) -> BlockChainInfo {
+		BlockChainClient::chain_info(self)
+	}
+
+	fn call_contract(&self, id: BlockId, address: Address, data: Bytes) -> Result<Bytes, String> {
+		BlockChainClient::call_contract(self, id, address, data)
+	}
+
+	fn transact_contract(&self, address: Address, data: Bytes) -> Result<TransactionImportResult, EthcoreError> {
+		BlockChainClient::transact_contract(self, address, data)
+	}
+
+	fn block_number(&self, id: BlockId) -> Option<BlockNumber> {
+		BlockChainClient::block_number(self, id)
+	}
 }
 
 impl ProvingBlockChainClient for Client {

ethcore/src/client/test_client.rs

@@ -25,7 +25,7 @@ use devtools::*;
 use transaction::{Transaction, LocalizedTransaction, PendingTransaction, SignedTransaction, Action};
 use blockchain::TreeRoute;
 use client::{
-	BlockChainClient, MiningBlockChainClient, EngineClient, BlockChainInfo, BlockStatus, BlockId,
+	BlockChainClient, MiningBlockChainClient, BlockChainInfo, BlockStatus, BlockId,
 	TransactionId, UncleId, TraceId, TraceFilter, LastHashes, CallAnalytics, BlockImportError,
 	ProvingBlockChainClient,
 };
@@ -780,7 +780,7 @@ impl ProvingBlockChainClient for TestBlockChainClient {
 	}
 }
 
-impl EngineClient for TestBlockChainClient {
+impl super::traits::EngineClient for TestBlockChainClient {
 	fn update_sealing(&self) {
 		self.miner.update_sealing(self)
 	}
@@ -796,4 +796,20 @@ impl EngineClient for TestBlockChainClient {
 	fn epoch_transition_for(&self, _block_hash: H256) -> Option<::engines::EpochTransition> {
 		None
 	}
+
+	fn chain_info(&self) -> BlockChainInfo {
+		BlockChainClient::chain_info(self)
+	}
+
+	fn call_contract(&self, id: BlockId, address: Address, data: Bytes) -> Result<Bytes, String> {
+		BlockChainClient::call_contract(self, id, address, data)
+	}
+
+	fn transact_contract(&self, address: Address, data: Bytes) -> Result<TransactionImportResult, EthcoreError> {
+		BlockChainClient::transact_contract(self, address, data)
+	}
+
+	fn block_number(&self, id: BlockId) -> Option<BlockNumber> {
+		BlockChainClient::block_number(self, id)
+	}
 }

ethcore/src/client/traits.rs

@@ -307,7 +307,7 @@ pub trait MiningBlockChainClient: BlockChainClient {
 }
 
 /// Client facilities used by internally sealing Engines.
-pub trait EngineClient: MiningBlockChainClient {
+pub trait EngineClient: Sync + Send {
 	/// Make a new block and seal it.
 	fn update_sealing(&self);
 
@@ -323,6 +323,17 @@ pub trait EngineClient: MiningBlockChainClient {
 	///
 	/// The block corresponding the the parent hash must be stored already.
 	fn epoch_transition_for(&self, parent_hash: H256) -> Option<::engines::EpochTransition>;
+
+	/// Get block chain info.
+	fn chain_info(&self) -> BlockChainInfo;
+
+	/// Like `call`, but with various defaults. Designed to be used for calling contracts.
+	fn call_contract(&self, id: BlockId, address: Address, data: Bytes) -> Result<Bytes, String>;
+
+	/// Import a transaction: used for misbehaviour reporting.
+	fn transact_contract(&self, address: Address, data: Bytes) -> Result<TransactionImportResult, EthcoreError>;
+
+	fn block_number(&self, id: BlockId) -> Option<BlockNumber>;
 }
 
 /// Extended client interface for providing proofs of the state.

ethcore/src/engines/authority_round/mod.rs

@@ -23,7 +23,7 @@ use std::time::{UNIX_EPOCH, Duration};
 use account_provider::AccountProvider;
 use block::*;
 use builtin::Builtin;
-use client::{Client, EngineClient};
+use client::EngineClient;
 use engines::{Call, Engine, Seal, EngineError, ConstructedVerifier};
 use error::{Error, TransactionError, BlockError};
 use ethjson;
@@ -829,9 +829,9 @@ impl Engine for AuthorityRound {
 		Ok(())
 	}
 
-	fn register_client(&self, client: Weak<Client>) {
+	fn register_client(&self, client: Weak<EngineClient>) {
 		*self.client.write() = Some(client.clone());
-		self.validators.register_contract(client);
+		self.validators.register_client(client);
 	}
 
 	fn set_signer(&self, ap: Arc<AccountProvider>, address: Address, password: String) {

ethcore/src/engines/basic_authority.rs

@@ -28,7 +28,7 @@ use error::{BlockError, Error};
 use evm::Schedule;
 use ethjson;
 use header::{Header, BlockNumber};
-use client::Client;
+use client::EngineClient;
 use super::signer::EngineSigner;
 use super::validator_set::{ValidatorSet, SimpleList, new_validator_set};
 
@@ -235,8 +235,8 @@ impl Engine for BasicAuthority {
 		}
 	}
 
-	fn register_client(&self, client: Weak<Client>) {
-		self.validators.register_contract(client);
+	fn register_client(&self, client: Weak<EngineClient>) {
+		self.validators.register_client(client);
 	}
 
 	fn set_signer(&self, ap: Arc<AccountProvider>, address: Address, password: String) {

ethcore/src/engines/mod.rs

@@ -42,7 +42,7 @@ use self::epoch::PendingTransition;
 use account_provider::AccountProvider;
 use block::ExecutedBlock;
 use builtin::Builtin;
-use client::Client;
+use client::EngineClient;
 use evm::env_info::{EnvInfo, LastHashes};
 use error::Error;
 use evm::Schedule;
@@ -367,7 +367,7 @@ pub trait Engine : Sync + Send {
 	fn sign(&self, _hash: H256) -> Result<Signature, Error> { unimplemented!() }
 
 	/// Add Client which can be used for sealing, querying the state and sending messages.
-	fn register_client(&self, _client: Weak<Client>) {}
+	fn register_client(&self, _client: Weak<EngineClient>) {}
 
 	/// Trigger next step of the consensus engine.
 	fn step(&self) {}

ethcore/src/engines/tendermint/mod.rs

@@ -28,7 +28,7 @@ mod params;
 use std::sync::Weak;
 use std::sync::atomic::{AtomicUsize, Ordering as AtomicOrdering};
 use util::*;
-use client::{Client, EngineClient};
+use client::EngineClient;
 use error::{Error, BlockError};
 use header::{Header, BlockNumber};
 use builtin::Builtin;
@@ -766,13 +766,12 @@ impl Engine for Tendermint {
 		self.to_step(next_step);
 	}
 
-	fn register_client(&self, client: Weak<Client>) {
-		use client::BlockChainClient;
+	fn register_client(&self, client: Weak<EngineClient>) {
 		if let Some(c) = client.upgrade() {
 			self.height.store(c.chain_info().best_block_number as usize + 1, AtomicOrdering::SeqCst);
 		}
 		*self.client.write() = Some(client.clone());
-		self.validators.register_contract(client);
+		self.validators.register_client(client);
 	}
 }
 
@@ -1012,7 +1011,7 @@ mod tests {
 		let client = generate_dummy_client(0);
 		let notify = Arc::new(TestNotify::default());
 		client.add_notify(notify.clone());
-		engine.register_client(Arc::downgrade(&client));
+		engine.register_client(Arc::downgrade(&client) as _);
 
 		let prevote_current = vote(engine.as_ref(), |mh| tap.sign(v0, None, mh).map(H520::from), h, r, Step::Prevote, proposal);
 
@@ -1030,7 +1029,6 @@ mod tests {
 	fn seal_submission() {
 		use ethkey::{Generator, Random};
 		use transaction::{Transaction, Action};
-		use client::BlockChainClient;
 
 		let tap = Arc::new(AccountProvider::transient_provider());
 		// Accounts for signing votes.
@@ -1043,7 +1041,7 @@ mod tests {
 
 		let notify = Arc::new(TestNotify::default());
 		client.add_notify(notify.clone());
-		engine.register_client(Arc::downgrade(&client));
+		engine.register_client(Arc::downgrade(&client) as _);
 
 		let keypair = Random.generate().unwrap();
 		let transaction = Transaction {

ethcore/src/engines/validator_set/contract.rs

@@ -23,7 +23,7 @@ use util::*;
 use futures::Future;
 use native_contracts::ValidatorReport as Provider;
 
-use client::{Client, BlockChainClient};
+use client::EngineClient;
 use engines::{Call, Engine};
 use header::{Header, BlockNumber};
 
@@ -34,7 +34,7 @@ use super::safe_contract::ValidatorSafeContract;
 pub struct ValidatorContract {
 	validators: ValidatorSafeContract,
 	provider: Provider,
-	client: RwLock<Option<Weak<Client>>>, // TODO [keorn]: remove
+	client: RwLock<Option<Weak<EngineClient>>>, // TODO [keorn]: remove
 }
 
 impl ValidatorContract {
@@ -118,8 +118,8 @@ impl ValidatorSet for ValidatorContract {
 		}
 	}
 
-	fn register_contract(&self, client: Weak<Client>) {
-		self.validators.register_contract(client.clone());
+	fn register_client(&self, client: Weak<EngineClient>) {
+		self.validators.register_client(client.clone());
 		*self.client.write() = Some(client);
 	}
 }
@@ -143,7 +143,7 @@ mod tests {
 	fn fetches_validators() {
 		let client = generate_dummy_client_with_spec_and_accounts(Spec::new_validator_contract, None);
 		let vc = Arc::new(ValidatorContract::new(Address::from_str("0000000000000000000000000000000000000005").unwrap()));
-		vc.register_contract(Arc::downgrade(&client));
+		vc.register_client(Arc::downgrade(&client) as _);
 		let last_hash = client.best_block_header().hash();
 		assert!(vc.contains(&last_hash, &Address::from_str("7d577a597b2742b498cb5cf0c26cdcd726d39e6e").unwrap()));
 		assert!(vc.contains(&last_hash, &Address::from_str("82a978b3f5962a5b0957d9ee9eef472ee55b42f1").unwrap()));
@@ -154,7 +154,7 @@ mod tests {
 		let tap = Arc::new(AccountProvider::transient_provider());
 		let v1 = tap.insert_account("1".sha3().into(), "").unwrap();
 		let client = generate_dummy_client_with_spec_and_accounts(Spec::new_validator_contract, Some(tap.clone()));
-		client.engine().register_client(Arc::downgrade(&client));
+		client.engine().register_client(Arc::downgrade(&client) as _);
 		let validator_contract = Address::from_str("0000000000000000000000000000000000000005").unwrap();
 
 		// Make sure reporting can be done.

ethcore/src/engines/validator_set/mod.rs

@@ -27,7 +27,7 @@ use std::sync::Weak;
 use ids::BlockId;
 use util::{Bytes, Address, H256};
 use ethjson::spec::ValidatorSet as ValidatorSpec;
-use client::Client;
+use client::EngineClient;
 use header::{Header, BlockNumber};
 
 #[cfg(test)]
@@ -141,5 +141,5 @@ pub trait ValidatorSet: Send + Sync {
 	/// Notifies about benign misbehaviour.
 	fn report_benign(&self, _validator: &Address, _set_block: BlockNumber, _block: BlockNumber) {}
 	/// Allows blockchain state access.
-	fn register_contract(&self, _client: Weak<Client>) {}
+	fn register_client(&self, _client: Weak<EngineClient>) {}
 }

ethcore/src/engines/validator_set/multi.rs

@@ -22,7 +22,7 @@ use engines::{Call, Engine};
 use util::{Bytes, H256, Address, RwLock};
 use ids::BlockId;
 use header::{BlockNumber, Header};
-use client::{Client, BlockChainClient};
+use client::EngineClient;
 use super::{SystemCall, ValidatorSet};
 
 type BlockNumberLookup = Box<Fn(BlockId) -> Result<BlockNumber, String> + Send + Sync + 'static>;
@@ -129,9 +129,9 @@ impl ValidatorSet for Multi {
 		self.correct_set_by_number(set_block).1.report_benign(validator, set_block, block);
 	}
 
-	fn register_contract(&self, client: Weak<Client>) {
+	fn register_client(&self, client: Weak<EngineClient>) {
 		for set in self.sets.values() {
-			set.register_contract(client.clone());
+			set.register_client(client.clone());
 		}
 		*self.block_number.write() = Box::new(move |id| client
 			.upgrade()
@@ -143,7 +143,7 @@ impl ValidatorSet for Multi {
 #[cfg(test)]
 mod tests {
 	use account_provider::AccountProvider;
-	use client::{BlockChainClient, EngineClient};
+	use client::BlockChainClient;
 	use engines::EpochChange;
 	use engines::validator_set::ValidatorSet;
 	use ethkey::Secret;
@@ -165,7 +165,7 @@ mod tests {
 		let v0 = tap.insert_account(s0.clone(), "").unwrap();
 		let v1 = tap.insert_account("1".sha3().into(), "").unwrap();
 		let client = generate_dummy_client_with_spec_and_accounts(Spec::new_validator_multi, Some(tap));
-		client.engine().register_client(Arc::downgrade(&client));
+		client.engine().register_client(Arc::downgrade(&client) as _);
 
 		// Make sure txs go through.
 		client.miner().set_gas_floor_target(1_000_000.into());
@@ -173,27 +173,27 @@ mod tests {
 		// Wrong signer for the first block.
 		client.miner().set_engine_signer(v1, "".into()).unwrap();
 		client.transact_contract(Default::default(), Default::default()).unwrap();
-		client.update_sealing();
+		::client::EngineClient::update_sealing(&*client);
 		assert_eq!(client.chain_info().best_block_number, 0);
 		// Right signer for the first block.
 		client.miner().set_engine_signer(v0, "".into()).unwrap();
-		client.update_sealing();
+		::client::EngineClient::update_sealing(&*client);
 		assert_eq!(client.chain_info().best_block_number, 1);
 		// This time v0 is wrong.
 		client.transact_contract(Default::default(), Default::default()).unwrap();
-		client.update_sealing();
+		::client::EngineClient::update_sealing(&*client);
 		assert_eq!(client.chain_info().best_block_number, 1);
 		client.miner().set_engine_signer(v1, "".into()).unwrap();
-		client.update_sealing();
+		::client::EngineClient::update_sealing(&*client);
 		assert_eq!(client.chain_info().best_block_number, 2);
 		// v1 is still good.
 		client.transact_contract(Default::default(), Default::default()).unwrap();
-		client.update_sealing();
+		::client::EngineClient::update_sealing(&*client);
 		assert_eq!(client.chain_info().best_block_number, 3);
 
 		// Check syncing.
 		let sync_client = generate_dummy_client_with_spec_and_data(Spec::new_validator_multi, 0, 0, &[]);
-		sync_client.engine().register_client(Arc::downgrade(&sync_client));
+		sync_client.engine().register_client(Arc::downgrade(&sync_client) as _);
 		for i in 1..4 {
 			sync_client.import_block(client.block(BlockId::Number(i)).unwrap().into_inner()).unwrap();
 		}

ethcore/src/engines/validator_set/safe_contract.rs

@@ -25,7 +25,7 @@ use util::cache::MemoryLruCache;
 use rlp::{UntrustedRlp, RlpStream};
 
 use basic_types::LogBloom;
-use client::{Client, BlockChainClient};
+use client::EngineClient;
 use engines::{Call, Engine};
 use header::Header;
 use ids::BlockId;
@@ -72,7 +72,7 @@ pub struct ValidatorSafeContract {
 	pub address: Address,
 	validators: RwLock<MemoryLruCache<H256, SimpleList>>,
 	provider: Provider,
-	client: RwLock<Option<Weak<Client>>>, // TODO [keorn]: remove
+	client: RwLock<Option<Weak<EngineClient>>>, // TODO [keorn]: remove
 }
 
 // first proof is just a state proof call of `getValidators` at header's state.
@@ -446,7 +446,7 @@ impl ValidatorSet for ValidatorSafeContract {
 				 }))
 	}
 
-	fn register_contract(&self, client: Weak<Client>) {
+	fn register_client(&self, client: Weak<EngineClient>) {
 		trace!(target: "engine", "Setting up contract caller.");
 		*self.client.write() = Some(client);
 	}
@@ -460,7 +460,7 @@ mod tests {
 	use spec::Spec;
 	use account_provider::AccountProvider;
 	use transaction::{Transaction, Action};
-	use client::{BlockChainClient, EngineClient};
+	use client::BlockChainClient;
 	use ethkey::Secret;
 	use miner::MinerService;
 	use tests::helpers::{generate_dummy_client_with_spec_and_accounts, generate_dummy_client_with_spec_and_data};
@@ -471,7 +471,7 @@ mod tests {
 	fn fetches_validators() {
 		let client = generate_dummy_client_with_spec_and_accounts(Spec::new_validator_safe_contract, None);
 		let vc = Arc::new(ValidatorSafeContract::new(Address::from_str("0000000000000000000000000000000000000005").unwrap()));
-		vc.register_contract(Arc::downgrade(&client));
+		vc.register_client(Arc::downgrade(&client) as _);
 		let last_hash = client.best_block_header().hash();
 		assert!(vc.contains(&last_hash, &Address::from_str("7d577a597b2742b498cb5cf0c26cdcd726d39e6e").unwrap()));
 		assert!(vc.contains(&last_hash, &Address::from_str("82a978b3f5962a5b0957d9ee9eef472ee55b42f1").unwrap()));
@@ -485,7 +485,7 @@ mod tests {
 		let v1 = tap.insert_account("0".sha3().into(), "").unwrap();
 		let network_id = Spec::new_validator_safe_contract().network_id();
 		let client = generate_dummy_client_with_spec_and_accounts(Spec::new_validator_safe_contract, Some(tap));
-		client.engine().register_client(Arc::downgrade(&client));
+		client.engine().register_client(Arc::downgrade(&client) as _);
 		let validator_contract = Address::from_str("0000000000000000000000000000000000000005").unwrap();
 
 		client.miner().set_engine_signer(v1, "".into()).unwrap();
@@ -499,7 +499,7 @@ mod tests {
 			data: "bfc708a000000000000000000000000082a978b3f5962a5b0957d9ee9eef472ee55b42f1".from_hex().unwrap(),
 		}.sign(&s0, Some(network_id));
 		client.miner().import_own_transaction(client.as_ref(), tx.into()).unwrap();
-		client.update_sealing();
+		::client::EngineClient::update_sealing(&*client);
 		assert_eq!(client.chain_info().best_block_number, 1);
 		// Add "1" validator back in.
 		let tx = Transaction {
@@ -511,13 +511,13 @@ mod tests {
 			data: "4d238c8e00000000000000000000000082a978b3f5962a5b0957d9ee9eef472ee55b42f1".from_hex().unwrap(),
 		}.sign(&s0, Some(network_id));
 		client.miner().import_own_transaction(client.as_ref(), tx.into()).unwrap();
-		client.update_sealing();
+		::client::EngineClient::update_sealing(&*client);
 		// The transaction is not yet included so still unable to seal.
 		assert_eq!(client.chain_info().best_block_number, 1);
 
 		// Switch to the validator that is still there.
 		client.miner().set_engine_signer(v0, "".into()).unwrap();
-		client.update_sealing();
+		::client::EngineClient::update_sealing(&*client);
 		assert_eq!(client.chain_info().best_block_number, 2);
 		// Switch back to the added validator, since the state is updated.
 		client.miner().set_engine_signer(v1, "".into()).unwrap();
@@ -530,13 +530,13 @@ mod tests {
 			data: Vec::new(),
 		}.sign(&s0, Some(network_id));
 		client.miner().import_own_transaction(client.as_ref(), tx.into()).unwrap();
-		client.update_sealing();
+		::client::EngineClient::update_sealing(&*client);
 		// Able to seal again.
 		assert_eq!(client.chain_info().best_block_number, 3);
 
 		// Check syncing.
 		let sync_client = generate_dummy_client_with_spec_and_data(Spec::new_validator_safe_contract, 0, 0, &[]);
-		sync_client.engine().register_client(Arc::downgrade(&sync_client));
+		sync_client.engine().register_client(Arc::downgrade(&sync_client) as _);
 		for i in 1..4 {
 			sync_client.import_block(client.block(BlockId::Number(i)).unwrap().into_inner()).unwrap();
 		}

ethcore/src/service.rs

@@ -112,7 +112,7 @@ impl ClientService {
 		});
 		io_service.register_handler(client_io)?;
 
-		spec.engine.register_client(Arc::downgrade(&client));
+		spec.engine.register_client(Arc::downgrade(&client) as _);
 
 		let stop_guard = ::devtools::StopGuard::new();
 		run_ipc(ipc_path, client.clone(), snapshot.clone(), stop_guard.share());

ethcore/src/snapshot/tests/proof_of_authority.rs

@@ -93,7 +93,7 @@ fn make_chain(accounts: Arc<AccountProvider>, blocks_beyond: usize, transitions:
 	let mut cur_signers = vec![*RICH_ADDR];
 	{
 		let engine = client.engine();
-		engine.register_client(Arc::downgrade(&client));
+		engine.register_client(Arc::downgrade(&client) as _);
 	}
 
 	{