eip214, #4833

ethcore/res/ethereum/frontier_like_test.json

@@ -12,7 +12,7 @@
 				"homesteadTransition": "0x118c30",
 				"daoHardforkTransition": "0x1d4c00",
 				"daoHardforkBeneficiary": "0xbf4ed7b27f1d666546e30d74d50d173d20bca754",
-				"daoHardforkAccounts": [  
+				"daoHardforkAccounts": [
 					"0xd4fe7bc31cedb7bfb8a345f31e668033056b2728",
 					"0xb3fb0e5aba0e20e5c49d252dfd30e102b171a425",
 					"0x2c19c7f9ae8b751e37aeb2d93a699722395ae18f",

ethcore/res/ethereum/transition_test.json

@@ -12,7 +12,7 @@
 				"homesteadTransition": "0x5",
 				"daoHardforkTransition": "0x8",
 				"daoHardforkBeneficiary": "0xbf4ed7b27f1d666546e30d74d50d173d20bca754",
-				"daoHardforkAccounts": [  
+				"daoHardforkAccounts": [
 					"0xd4fe7bc31cedb7bfb8a345f31e668033056b2728",
 					"0xb3fb0e5aba0e20e5c49d252dfd30e102b171a425",
 					"0x2c19c7f9ae8b751e37aeb2d93a699722395ae18f",

ethcore/src/client/test_client.rs

@@ -55,7 +55,7 @@ pub struct TestBlockChainClient {
 	/// Blocks.
 	pub blocks: RwLock<HashMap<H256, Bytes>>,
 	/// Mapping of numbers to hashes.
- 	pub numbers: RwLock<HashMap<usize, H256>>,
+	pub numbers: RwLock<HashMap<usize, H256>>,
 	/// Genesis block hash.
 	pub genesis_hash: H256,
 	/// Last block hash.
@@ -353,7 +353,7 @@ pub fn get_temp_state_db() -> GuardedTempResult<StateDB> {
 
 impl MiningBlockChainClient for TestBlockChainClient {
 	fn latest_schedule(&self) -> Schedule {
-		Schedule::new_post_eip150(24576, true, true, true, true)
+		Schedule::new_post_eip150(24576, true, true, true)
 	}
 
 	fn prepare_open_block(&self, author: Address, gas_range_target: (U256, U256), extra_data: Bytes) -> OpenBlock {

ethcore/src/engines/authority_round.rs

@@ -26,9 +26,8 @@ use account_provider::AccountProvider;
 use block::*;
 use spec::CommonParams;
 use engines::{Call, Engine, Seal, EngineError};
-use header::{Header, BlockNumber};
+use header::Header;
 use error::{Error, TransactionError, BlockError};
-use evm::Schedule;
 use ethjson;
 use io::{IoContext, IoHandler, TimerToken, IoService};
 use builtin::Builtin;
@@ -293,11 +292,6 @@ impl Engine for AuthorityRound {
 		]
 	}
 
-	fn schedule(&self, block_number: BlockNumber) -> Schedule {
-		let eip86 = block_number >= self.params.eip86_transition;
-		Schedule::new_post_eip150(usize::max_value(), true, true, true, eip86)
-	}
-
 	fn populate_from_parent(&self, header: &mut Header, parent: &Header, gas_floor_target: U256, _gas_ceil_target: U256) {
 		// Chain scoring: total weight is sqrt(U256::max_value())*height - step
 		let new_difficulty = U256::from(U128::max_value()) + header_step(parent).expect("Header has been verified; qed").into() - self.step.load().into();

ethcore/src/engines/instant_seal.rs

@@ -19,9 +19,7 @@ use util::{Address, HashMap};
 use builtin::Builtin;
 use engines::{Engine, Seal};
 use spec::CommonParams;
-use evm::Schedule;
 use block::ExecutedBlock;
-use header::BlockNumber;
 
 /// An engine which does not provide any consensus mechanism, just seals blocks internally.
 pub struct InstantSeal {
@@ -58,11 +56,6 @@ impl Engine for InstantSeal {
 		&self.builtins
 	}
 
-	fn schedule(&self, block_number: BlockNumber) -> Schedule {
-		let eip86 = block_number >= self.params.eip86_transition;
-		Schedule::new_post_eip150(usize::max_value(), true, true, true, eip86)
-	}
-
 	fn seals_internally(&self) -> Option<bool> { Some(true) }
 
 	fn generate_seal(&self, _block: &ExecutedBlock) -> Seal {

ethcore/src/engines/mod.rs

@@ -147,7 +147,9 @@ pub trait Engine : Sync + Send {
 	fn params(&self) -> &CommonParams;
 
 	/// Get the EVM schedule for the given `block_number`.
-	fn schedule(&self, block_number: BlockNumber) -> Schedule;
+	fn schedule(&self, block_number: BlockNumber) -> Schedule {
+		Schedule::from_params(block_number, self.params())
+	}
 
 	/// Builtin-contracts we would like to see in the chain.
 	/// (In principle these are just hints for the engine since that has the last word on them.)

ethcore/src/engines/tendermint/mod.rs

@@ -38,7 +38,6 @@ use account_provider::AccountProvider;
 use block::*;
 use spec::CommonParams;
 use engines::{Engine, Seal, EngineError};
-use evm::Schedule;
 use state::CleanupMode;
 use io::IoService;
 use super::signer::EngineSigner;
@@ -404,11 +403,6 @@ impl Engine for Tendermint {
 		]
 	}
 
-	fn schedule(&self, block_number: BlockNumber) -> Schedule {
-		let eip86 = block_number >= self.params.eip86_transition;
-		Schedule::new_post_eip150(usize::max_value(), true, true, true, eip86)
-	}
-
 	fn populate_from_parent(&self, header: &mut Header, parent: &Header, gas_floor_target: U256, _gas_ceil_target: U256) {
 		// Chain scoring: total weight is sqrt(U256::max_value())*height - view
 		let new_difficulty = U256::from(U128::max_value()) + consensus_view(parent).expect("Header has been verified; qed").into() - self.view.load(AtomicOrdering::SeqCst).into();

ethcore/src/ethereum/ethash.rs

@@ -196,13 +196,13 @@ impl Engine for Arc<Ethash> {
 		} else if block_number < self.ethash_params.eip150_transition {
 			Schedule::new_homestead()
 		} else {
-			Schedule::new_post_eip150(
+			let mut schedule = Schedule::new_post_eip150(
 				self.ethash_params.max_code_size as usize,
 				block_number >= self.ethash_params.eip160_transition,
 				block_number >= self.ethash_params.eip161abc_transition,
-				block_number >= self.ethash_params.eip161d_transition,
-				block_number >= self.params.eip86_transition
-			)
+				block_number >= self.ethash_params.eip161d_transition);
+			schedule.apply_params(block_number, self.params());
+			schedule
 		}
 	}
 

ethcore/src/evm/evm.rs

@@ -62,7 +62,8 @@ pub enum Error {
 	},
 	/// Built-in contract failed on given input
 	BuiltIn(&'static str),
-	/// Returned on evm internal error. Should never be ignored during development.
+	/// When execution tries to modify the state in static context
+	MutableCallInStaticContext,
 	/// Likely to cause consensus issues.
 	Internal(String),
 }
@@ -90,6 +91,7 @@ impl fmt::Display for Error {
 			OutOfStack { instruction, wanted, limit } => write!(f, "Out of stack {} {}/{}", instruction, wanted, limit),
 			BuiltIn(name) => write!(f, "Built-in failed: {}", name),
 			Internal(ref msg) => write!(f, "Internal error: {}", msg),
+			MutableCallInStaticContext => write!(f, "Mutable call in static context"),
 		}
 	}
 }

ethcore/src/evm/ext.rs

@@ -53,25 +53,24 @@ pub enum CreateContractAddress {
 }
 
 /// Externalities interface for EVMs
-// TODO: [rob] associated error type instead of `trie::Result`. Not all EVMs are trie powered.
 pub trait Ext {
 	/// Returns a value for given key.
-	fn storage_at(&self, key: &H256) -> trie::Result<H256>;
+	fn storage_at(&self, key: &H256) -> evm::Result<H256>;
 
 	/// Stores a value for given key.
-	fn set_storage(&mut self, key: H256, value: H256) -> trie::Result<()>;
+	fn set_storage(&mut self, key: H256, value: H256) -> evm::Result<()>;
 
 	/// Determine whether an account exists.
-	fn exists(&self, address: &Address) -> trie::Result<bool>;
+	fn exists(&self, address: &Address) -> evm::Result<bool>;
 
 	/// Determine whether an account exists and is not null (zero balance/nonce, no code).
-	fn exists_and_not_null(&self, address: &Address) -> trie::Result<bool>;
+	fn exists_and_not_null(&self, address: &Address) -> evm::Result<bool>;
 
 	/// Balance of the origin account.
-	fn origin_balance(&self) -> trie::Result<U256>;
+	fn origin_balance(&self) -> evm::Result<U256>;
 
 	/// Returns address balance.
-	fn balance(&self, address: &Address) -> trie::Result<U256>;
+	fn balance(&self, address: &Address) -> evm::Result<U256>;
 
 	/// Returns the hash of one of the 256 most recent complete blocks.
 	fn blockhash(&mut self, number: &U256) -> H256;
@@ -99,21 +98,21 @@ pub trait Ext {
 	) -> MessageCallResult;
 
 	/// Returns code at given address
-	fn extcode(&self, address: &Address) -> trie::Result<Arc<Bytes>>;
+	fn extcode(&self, address: &Address) -> evm::Result<Arc<Bytes>>;
 
 	/// Returns code size at given address
-	fn extcodesize(&self, address: &Address) -> trie::Result<usize>;
+	fn extcodesize(&self, address: &Address) -> evm::Result<usize>;
 
 	/// Creates log entry with given topics and data
-	fn log(&mut self, topics: Vec<H256>, data: &[u8]);
+	fn log(&mut self, topics: Vec<H256>, data: &[u8]) -> evm::Result<()>;
 
 	/// Should be called when transaction calls `RETURN` opcode.
 	/// Returns gas_left if cost of returning the data is not too high.
 	fn ret(self, gas: &U256, data: &ReturnData) -> evm::Result<U256>;
 
 	/// Should be called when contract commits suicide.
 	/// Address to which funds should be refunded.
-	fn suicide(&mut self, refund_address: &Address) -> trie::Result<()> ;
+	fn suicide(&mut self, refund_address: &Address) -> evm::Result<()> ;
 
 	/// Returns schedule.
 	fn schedule(&self) -> &Schedule;

ethcore/src/evm/instructions.rs

@@ -279,6 +279,7 @@ lazy_static! {
 		arr[CALLCODE as usize] =		InstructionInfo::new("CALLCODE",		0, 7, 1, true, GasPriceTier::Special);
 		arr[RETURN as usize] =			InstructionInfo::new("RETURN",			0, 2, 0, true, GasPriceTier::Zero);
 		arr[DELEGATECALL as usize] =	InstructionInfo::new("DELEGATECALL",	0, 6, 1, true, GasPriceTier::Special);
+		arr[STATICCALL as usize] =		InstructionInfo::new("STATICCALL",		0, 6, 1, true, GasPriceTier::Special);
 		arr[SUICIDE as usize] = 		InstructionInfo::new("SUICIDE",			0, 1, 0, true, GasPriceTier::Special);
 		arr[CREATE2 as usize] = 		InstructionInfo::new("CREATE2",			0, 3, 1, true, GasPriceTier::Special);
 		arr[REVERT as usize] =			InstructionInfo::new("REVERT",			0, 2, 0, true, GasPriceTier::Zero);
@@ -565,6 +566,8 @@ pub const DELEGATECALL: Instruction = 0xf4;
 pub const CREATE2: Instruction = 0xfb;
 /// stop execution and revert state changes. Return output data.
 pub const REVERT: Instruction = 0xfd;
+/// like CALL but it does not take value, nor modify the state
+pub const STATICCALL: Instruction = 0xfa;
 /// halt execution and register account for later deletion
 pub const SUICIDE: Instruction = 0xff;
 

ethcore/src/evm/interpreter/gasometer.rs

@@ -213,7 +213,7 @@ impl<Gas: CostType> Gasometer<Gas> {
 
 				Request::GasMemProvide(gas, mem, Some(requested))
 			},
-			instructions::DELEGATECALL => {
+			instructions::DELEGATECALL | instructions::STATICCALL => {
 				let gas = Gas::from(schedule.call_gas);
 				let mem = cmp::max(
 					mem_needed(stack.peek(4), stack.peek(5))?,

ethcore/src/evm/interpreter/mod.rs

@@ -199,6 +199,7 @@ impl<Cost: CostType> Interpreter<Cost> {
 
 		if (instruction == instructions::DELEGATECALL && !schedule.have_delegate_call) ||
 			(instruction == instructions::CREATE2 && !schedule.have_create2) ||
+			(instruction == instructions::STATICCALL && !schedule.have_static_call) ||
 			(instruction == instructions::REVERT && !schedule.have_revert) {
 
 			return Err(evm::Error::BadInstruction {
@@ -312,14 +313,15 @@ impl<Cost: CostType> Interpreter<Cost> {
 					}
 				};
 			},
-			instructions::CALL | instructions::CALLCODE | instructions::DELEGATECALL => {
+			instructions::CALL | instructions::CALLCODE | instructions::DELEGATECALL | instructions::STATICCALL => {
 				assert!(ext.schedule().call_value_transfer_gas > ext.schedule().call_stipend, "overflow possible");
+
 				stack.pop_back();
 				let call_gas = provided.expect("`provided` comes through Self::exec from `Gasometer::get_gas_cost_mem`; `gas_gas_mem_cost` guarantees `Some` when instruction is `CALL`/`CALLCODE`/`DELEGATECALL`/`CREATE`; this is one of `CALL`/`CALLCODE`/`DELEGATECALL`; qed");
 				let code_address = stack.pop_back();
 				let code_address = u256_to_address(&code_address);
 
-				let value = if instruction == instructions::DELEGATECALL {
+				let value = if instruction == instructions::DELEGATECALL || instruction ==  instructions::STATICCALL {
 					None
 				} else {
 					Some(stack.pop_back())
@@ -347,6 +349,7 @@ impl<Cost: CostType> Interpreter<Cost> {
 						(&params.address, &params.address, has_balance, CallType::CallCode)
 					},
 					instructions::DELEGATECALL => (&params.sender, &params.address, true, CallType::DelegateCall),
+					instructions::STATICCALL => (&params.sender, &params.address, true, CallType::StaticCall),
 					_ => panic!(format!("Unexpected instruction {} in CALL branch.", instruction))
 				};
 
@@ -405,7 +408,7 @@ impl<Cost: CostType> Interpreter<Cost> {
 					.iter()
 					.map(H256::from)
 					.collect();
-				ext.log(topics, self.mem.read_slice(offset, size));
+				ext.log(topics, self.mem.read_slice(offset, size))?;
 			},
 			instructions::PUSH1...instructions::PUSH32 => {
 				let bytes = instructions::get_push_bytes(instruction);

ethcore/src/evm/schedule.rs

@@ -15,6 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 //! Cost schedule and other parameterisations for the EVM.
+use spec::CommonParams;
 
 /// Definition of the cost schedule and other parameterisations for the EVM.
 pub struct Schedule {
@@ -105,6 +106,8 @@ pub struct Schedule {
 	pub kill_empty: bool,
 	/// Blockhash instruction gas cost.
 	pub blockhash_gas: usize,
+	/// Static Call opcode enabled.
+	pub have_static_call: bool,
 }
 
 impl Schedule {
@@ -119,12 +122,12 @@ impl Schedule {
 	}
 
 	/// Schedule for the post-EIP-150-era of the Ethereum main net.
-	pub fn new_post_eip150(max_code_size: usize, fix_exp: bool, no_empty: bool, kill_empty: bool, have_metropolis_instructions: bool) -> Schedule {
+	pub fn new_post_eip150(max_code_size: usize, fix_exp: bool, no_empty: bool, kill_empty: bool) -> Schedule {
 		Schedule {
 			exceptional_failed_code_deposit: true,
 			have_delegate_call: true,
-			have_create2: have_metropolis_instructions,
-			have_revert: have_metropolis_instructions,
+			have_create2: false,
+			have_revert: false,
 			stack_limit: 1024,
 			max_depth: 1024,
 			tier_step_gas: [0, 2, 3, 5, 8, 10, 20, 0],
@@ -163,13 +166,36 @@ impl Schedule {
 			sub_gas_cap_divisor: Some(64),
 			no_empty: no_empty,
 			kill_empty: kill_empty,
-			blockhash_gas: if have_metropolis_instructions { 350 } else { 20 },
+			blockhash_gas: 20,
+			have_static_call: false,
+		}
+	}
+
+	/// Schedule for the Metropolis era from common spec params.
+	pub fn from_params(block_number: u64, params: &CommonParams) -> Schedule {
+		let mut schedule = Schedule::new_post_eip150(usize::max_value(), true, true, true);
+		schedule.apply_params(block_number, params);
+		schedule
+ 	}
+
+	/// Apply common spec config parameters to the schedule.
+ 	pub fn apply_params(&mut self, block_number: u64, params: &CommonParams) {
+		self.have_create2 = block_number >= params.eip86_transition;
+		self.have_revert = block_number >= params.eip140_transition;
+		self.have_static_call = block_number >= params.eip214_transition;
+		if block_number >= params.eip210_transition {
+			self.blockhash_gas = 350;
 		}
 	}
 
 	/// Schedule for the Metropolis of the Ethereum main net.
 	pub fn new_metropolis() -> Schedule {
-		Self::new_post_eip150(24576, true, true, true, true)
+		let mut schedule = Self::new_post_eip150(24576, true, true, true);
+		schedule.have_create2 = true;
+		schedule.have_revert = true;
+		schedule.have_static_call = true;
+		schedule.blockhash_gas = 350;
+		schedule
 	}
 
 	fn new(efcd: bool, hdc: bool, tcg: usize) -> Schedule {
@@ -217,6 +243,7 @@ impl Schedule {
 			no_empty: false,
 			kill_empty: false,
 			blockhash_gas: 20,
+			have_static_call: false,
 		}
 	}
 }