Changing delegatecall logic

Cargo.toml

@@ -21,7 +21,7 @@ evmjit = { path = "rust-evmjit", optional = true }
 ethash = { path = "ethash" }
 num_cpus = "0.2"
 ctrlc = "1.0"
-clippy = "*" # Always newest, since we use nightly
+clippy = "0.0.37" # Always newest, since we use nightly
 
 [features]
 jit = ["evmjit"]

src/evm/ext.rs

@@ -55,19 +55,9 @@ pub trait Ext {
 	/// and true if subcall was successfull.
 	fn call(&mut self, 
 			gas: &U256, 
-			address: &Address, 
-			value: &U256, 
-			data: &[u8], 
-			code_address: &Address, 
-			output: &mut [u8]) -> MessageCallResult;
-
-	/// Delegate Message call.
-	/// 
-	/// Returns Err, if we run out of gas.
-	/// Otherwise returns call_result which contains gas left 
-	/// and true if subcall was successfull.
-	fn delegatecall(&mut self, 
-			gas: &U256, 
+			sender_address: &Address, 
+			receive_address: &Address, 
+			value: Option<&U256>,
 			data: &[u8], 
 			code_address: &Address, 
 			output: &mut [u8]) -> MessageCallResult;

src/evm/interpreter.rs

@@ -587,7 +587,7 @@ impl Interpreter {
 					// and we don't want to copy
 					let input = unsafe { ::std::mem::transmute(mem.read_slice(in_off, in_size)) };
 					let output = mem.writeable_slice(out_off, out_size);
-					ext.delegatecall(&call_gas, input, &code_address, output)
+					ext.call(&call_gas, &params.sender, &params.address, None, input, &code_address, output)
 				};
 
 				return match call_result {
@@ -609,11 +609,6 @@ impl Interpreter {
 
 				let value = stack.pop_back();
 
-				let address = match instruction == instructions::CALL {
-					true => &code_address,
-					false => &params.address
-				};
-
 				let in_off = stack.pop_back();
 				let in_size = stack.pop_back();
 				let out_off = stack.pop_back();
@@ -624,6 +619,11 @@ impl Interpreter {
 					false => U256::zero()
 				};
 
+				let (sender_address, receive_address) = match instruction == instructions::CALL {
+					true => (&params.address, &code_address),
+					false => (&params.address, &params.address)
+				};
+
 				let can_call = ext.balance(&params.address) >= value && ext.depth() < ext.schedule().max_depth;
 
 				if !can_call {
@@ -636,7 +636,7 @@ impl Interpreter {
 					// and we don't want to copy
 					let input = unsafe { ::std::mem::transmute(mem.read_slice(in_off, in_size)) };
 					let output = mem.writeable_slice(out_off, out_size);
-					ext.call(&call_gas, address, &value, input, &code_address, output)
+					ext.call(&call_gas, sender_address, receive_address, Some(&value), input, &code_address, output)
 				};
 
 				return match call_result {

src/evm/tests.rs

@@ -61,22 +61,15 @@ impl Ext for FakeExt {
 
 	fn call(&mut self, 
 			_gas: &U256, 
-			_address: &Address, 
-			_value: &U256, 
+			_sender_address: &Address, 
+			_receive_address: &Address, 
+			_value: Option<&U256>,
 			_data: &[u8], 
 			_code_address: &Address, 
 			_output: &mut [u8]) -> MessageCallResult {
 		unimplemented!();
 	}
 
-	fn delegatecall(&mut self, 
-			_gas: &U256, 
-			_data: &[u8], 
-			_address: &Address, 
-			_output: &mut [u8]) -> MessageCallResult {
-		unimplemented!();
-	}
-
 	fn extcode(&self, address: &Address) -> Bytes {
 		self.codes.get(address).unwrap_or(&Bytes::new()).clone()
 	}

src/externalities.rs

@@ -17,18 +17,16 @@ pub enum OutputPolicy<'a> {
 
 /// Transaction properties that externalities need to know about.
 pub struct OriginInfo {
-	sender: Address,
-	value: U256,
 	address: Address,
 	origin: Address,
-	gas_price: U256
+	gas_price: U256,
+	value: U256
 }
 
 impl OriginInfo {
 	/// Populates origin info from action params.
 	pub fn from(params: &ActionParams) -> Self {
 		OriginInfo {
-			sender: params.sender.clone(),
 			address: params.address.clone(),
 			origin: params.origin.clone(),
 			gas_price: params.gas_price.clone(),
@@ -136,52 +134,31 @@ impl<'a> Ext for Externalities<'a> {
 		}
 	}
 
-	fn delegatecall(&mut self, 
-			gas: &U256, 
-			data: &[u8], 
-			code_address: &Address, 
-			output: &mut [u8]) -> MessageCallResult {
-
-		let params = ActionParams {
-			code_address: code_address.clone(),
-			address: self.origin_info.address.clone(), 
-			sender: self.origin_info.sender.clone(),
-			origin: self.origin_info.origin.clone(),
-			gas: *gas,
-			gas_price: self.origin_info.gas_price.clone(),
-			value: ActionValue::Apparent(self.origin_info.value.clone()),
-			code: self.state.code(code_address),
-			data: Some(data.to_vec()),
-		};
-
-		let mut ex = Executive::from_parent(self.state, self.env_info, self.engine, self.depth);
-    
-		match ex.call(params, self.substate, BytesRef::Fixed(output)) {
-			Ok(gas_left) => MessageCallResult::Success(gas_left),
-			_ => MessageCallResult::Failed
-		}
-  }
-
 	fn call(&mut self, 
 			gas: &U256, 
-			address: &Address, 
-			value: &U256, 
+			sender_address: &Address, 
+			receive_address: &Address, 
+			value: Option<&U256>,
 			data: &[u8], 
 			code_address: &Address, 
 			output: &mut [u8]) -> MessageCallResult {
 
-		let params = ActionParams {
+		let mut params = ActionParams {
+			sender: sender_address.clone(),
+			address: receive_address.clone(), 
+			value: ActionValue::Apparent(self.origin_info.value.clone()),
 			code_address: code_address.clone(),
-			address: address.clone(), 
-			sender: self.origin_info.address.clone(),
 			origin: self.origin_info.origin.clone(),
 			gas: *gas,
 			gas_price: self.origin_info.gas_price.clone(),
-			value: ActionValue::Transfer(value.clone()),
 			code: self.state.code(code_address),
 			data: Some(data.to_vec()),
 		};
 
+		if let Some(value) = value {
+			params.value = ActionValue::Transfer(value.clone());
+		}
+
 		let mut ex = Executive::from_parent(self.state, self.env_info, self.engine, self.depth);
 
 		match ex.call(params, self.substate, BytesRef::Fixed(output)) {

src/tests/executive.rs

@@ -101,8 +101,9 @@ impl<'a> Ext for TestExt<'a> {
 
 	fn call(&mut self, 
 			gas: &U256, 
+			_sender_address: &Address, 
 			receive_address: &Address, 
-			value: &U256, 
+			value: Option<&U256>,
 			data: &[u8], 
 			_code_address: &Address, 
 			_output: &mut [u8]) -> MessageCallResult {
@@ -110,22 +111,7 @@ impl<'a> Ext for TestExt<'a> {
 			data: data.to_vec(),
 			destination: Some(receive_address.clone()),
 			gas_limit: *gas,
-			value: *value
-		});
-		MessageCallResult::Success(*gas)
-	}
-
-	fn delegatecall(&mut self, 
-			gas: &U256, 
-			data: &[u8], 
-			_code_address: &Address, 
-			_output: &mut [u8]) -> MessageCallResult {
-
-		self.callcreates.push(CallCreate {
-			data: data.to_vec(),
-			destination: None,
-			gas_limit: *gas,
-			value: U256::zero()
+			value: *value.unwrap()
 		});
 		MessageCallResult::Success(*gas)
 	}