implemented eth_storageAt rpc method, added more tests for rpc

ethcore/src/client/client.rs

@@ -453,6 +453,10 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		self.state().balance(address)
 	}
 
+	fn storage_at(&self, address: &Address, position: &H256) -> H256 {
+		self.state().storage_at(address, position)
+	}
+
 	fn transaction(&self, id: TransactionId) -> Option<LocalizedTransaction> {
 		match id {
 			TransactionId::Hash(ref hash) => self.chain.transaction_address(hash),

ethcore/src/client/mod.rs

@@ -69,6 +69,9 @@ pub trait BlockChainClient : Sync + Send {
 	/// Get address balance.
 	fn balance(&self, address: &Address) -> U256;
 
+	/// Get value of the storage at given position.
+	fn storage_at(&self, address: &Address, position: &H256) -> H256;
+
 	/// Get transaction with given hash.
 	fn transaction(&self, id: TransactionId) -> Option<LocalizedTransaction>;
 

ethcore/src/client/test_client.rs

@@ -42,6 +42,8 @@ pub struct TestBlockChainClient {
 	pub difficulty: RwLock<U256>,
 	/// Balances.
 	pub balances: RwLock<HashMap<Address, U256>>,
+	/// Storage.
+	pub storage: RwLock<HashMap<(Address, H256), H256>>,
 }
 
 #[derive(Clone)]
@@ -74,6 +76,7 @@ impl TestBlockChainClient {
 			last_hash: RwLock::new(H256::new()),
 			difficulty: RwLock::new(From::from(0)),
 			balances: RwLock::new(HashMap::new()),
+			storage: RwLock::new(HashMap::new()),
 		};
 		client.add_blocks(1, EachBlockWith::Nothing); // add genesis block
 		client.genesis_hash = client.last_hash.read().unwrap().clone();
@@ -84,6 +87,10 @@ impl TestBlockChainClient {
 		self.balances.write().unwrap().insert(address, balance);
 	}
 
+	pub fn set_storage(&mut self, address: Address, position: H256, value: H256) {
+		self.storage.write().unwrap().insert((address, position), value);
+	}
+
 	/// Add blocks to test client.
 	pub fn add_blocks(&mut self, count: usize, with: EachBlockWith) {
 		let len = self.numbers.read().unwrap().len();
@@ -182,6 +189,10 @@ impl BlockChainClient for TestBlockChainClient {
 		self.balances.read().unwrap().get(address).cloned().unwrap_or_else(U256::zero)
 	}
 
+	fn storage_at(&self, address: &Address, position: &H256) -> H256 {
+		self.storage.read().unwrap().get(&(address.clone(), position.clone())).cloned().unwrap_or_else(H256::new)
+	}
+
 	fn transaction(&self, _id: TransactionId) -> Option<LocalizedTransaction> {
 		unimplemented!();
 	}

rpc/src/v1/impls/eth.rs

@@ -101,7 +101,7 @@ impl<C, S, A> EthClient<C, S, A> where C: BlockChainClient, S: SyncProvider, A:
 impl<C, S, A> Eth for EthClient<C, S, A> where C: BlockChainClient + 'static, S: SyncProvider + 'static, A: AccountProvider + 'static {
 	fn protocol_version(&self, params: Params) -> Result<Value, Error> {
 		match params {
-			Params::None => to_value(&U256::from(take_weak!(self.sync).status().protocol_version)),
+			Params::None => Ok(Value::String(format!("{}", take_weak!(self.sync).status().protocol_version).to_owned())),
 			_ => Err(Error::invalid_params())
 		}
 	}
@@ -175,6 +175,12 @@ impl<C, S, A> Eth for EthClient<C, S, A> where C: BlockChainClient + 'static, S:
 			.and_then(|(address, _block_number)| to_value(&take_weak!(self.client).balance(&address)))
 	}
 
+	fn storage_at(&self, params: Params) -> Result<Value, Error> {
+		from_params::<(Address, U256, BlockNumber)>(params)
+			.and_then(|(address, position, _block_number)|
+				to_value(&U256::from(take_weak!(self.client).storage_at(&address, &H256::from(position)))))
+	}
+
 	fn block_transaction_count_by_hash(&self, params: Params) -> Result<Value, Error> {
 		from_params::<(H256,)>(params)
 			.and_then(|(hash,)| match take_weak!(self.client).block(BlockId::Hash(hash)) {

rpc/src/v1/tests/eth.rs

@@ -17,7 +17,7 @@
 use std::collections::HashMap;
 use std::sync::Arc;
 use jsonrpc_core::IoHandler;
-use util::hash::Address;
+use util::hash::{Address, H256};
 use util::numbers::U256;
 use ethcore::client::{TestBlockChainClient, EachBlockWith};
 use v1::{Eth, EthClient};
@@ -27,6 +27,7 @@ fn blockchain_client() -> Arc<TestBlockChainClient> {
 	let mut client = TestBlockChainClient::new();
 	client.add_blocks(10, EachBlockWith::Nothing);
 	client.set_balance(Address::from(1), U256::from(5));
+	client.set_storage(Address::from(1), H256::from(4), H256::from(7));
 	Arc::new(client)
 }
 
@@ -45,9 +46,9 @@ fn sync_provider() -> Arc<TestSyncProvider> {
 }
 
 struct EthTester {
-	client: Arc<TestBlockChainClient>,
-	sync: Arc<TestSyncProvider>,
-	accounts_provider: Arc<TestAccountProvider>,
+	_client: Arc<TestBlockChainClient>,
+	_sync: Arc<TestSyncProvider>,
+	_accounts_provider: Arc<TestAccountProvider>,
 	pub io: IoHandler,
 }
 
@@ -60,14 +61,54 @@ impl Default for EthTester {
 		let io = IoHandler::new();
 		io.add_delegate(eth);
 		EthTester {
-			client: client,
-			sync: sync,
-			accounts_provider: ap,
+			_client: client,
+			_sync: sync,
+			_accounts_provider: ap,
 			io: io
 		}
 	}
 }
 
+#[test]
+fn rpc_eth_protocol_version() {
+	let request = r#"{"jsonrpc": "2.0", "method": "eth_protocolVersion", "params": [], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"65","id":1}"#;
+
+	assert_eq!(EthTester::default().io.handle_request(request), Some(response.to_owned()));
+}
+
+#[test]
+#[ignore]
+fn rpc_eth_syncing() {
+	unimplemented!()
+}
+
+#[test]
+#[ignore]
+fn rpc_eth_hashrate() {
+	unimplemented!()
+}
+
+#[test]
+#[ignore]
+fn rpc_eth_author() {
+	unimplemented!()
+}
+
+#[test]
+#[ignore]
+fn rpc_eth_mining() {
+	unimplemented!()
+}
+
+#[test]
+fn rpc_eth_gas_price() {
+	let request = r#"{"jsonrpc": "2.0", "method": "eth_gasPrice", "params": [], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"0x0ba43b7400","id":1}"#;
+
+	assert_eq!(EthTester::default().io.handle_request(request), Some(response.to_owned()));
+}
+
 #[test]
 fn rpc_eth_accounts() {
 	let request = r#"{"jsonrpc": "2.0", "method": "eth_accounts", "params": [], "id": 1}"#;
@@ -76,6 +117,14 @@ fn rpc_eth_accounts() {
 	assert_eq!(EthTester::default().io.handle_request(request), Some(response.to_owned()));
 }
 
+#[test]
+fn rpc_eth_block_number() {
+	let request = r#"{"jsonrpc": "2.0", "method": "eth_blockNumber", "params": [], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"0x0a","id":1}"#;
+
+	assert_eq!(EthTester::default().io.handle_request(request), Some(response.to_owned()));
+}
+
 #[test]
 fn rpc_eth_balance() {
 	let request = r#"{
@@ -88,3 +137,16 @@ fn rpc_eth_balance() {
 
 	assert_eq!(EthTester::default().io.handle_request(request), Some(response.to_owned()));
 }
+
+#[test]
+fn rpc_eth_storage_at() {
+	let request = r#"{
+		"jsonrpc": "2.0",
+		"method": "eth_getStorageAt",
+		"params": ["0x0000000000000000000000000000000000000001", "0x4", "latest"],
+		"id": 1
+	}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"0x07","id":1}"#;
+
+	assert_eq!(EthTester::default().io.handle_request(request), Some(response.to_owned()));
+}