Integrate benchmarks and differential tests against an EVM interpreter (#7)

crates/differential/src/lib.rs

@@ -0,0 +1,154 @@
+use evm_interpreter::{
+    interpreter::{EtableInterpreter, RunInterpreter},
+    trap::CallCreateTrap,
+    Context, Etable, ExitError, Log, Machine, RuntimeBackend, RuntimeBaseBackend,
+    RuntimeEnvironment, RuntimeState, TransactionContext, Valids,
+};
+use primitive_types::{H160, H256, U256};
+
+static RUNTIME_ETABLE: Etable<RuntimeState, UnimplementedHandler, CallCreateTrap> =
+    Etable::runtime();
+
+pub struct UnimplementedHandler;
+
+impl RuntimeEnvironment for UnimplementedHandler {
+    fn block_hash(&self, _number: U256) -> H256 {
+        unimplemented!()
+    }
+    fn block_number(&self) -> U256 {
+        unimplemented!()
+    }
+    fn block_coinbase(&self) -> H160 {
+        unimplemented!()
+    }
+    fn block_timestamp(&self) -> U256 {
+        unimplemented!()
+    }
+    fn block_difficulty(&self) -> U256 {
+        unimplemented!()
+    }
+    fn block_randomness(&self) -> Option<H256> {
+        unimplemented!()
+    }
+    fn block_gas_limit(&self) -> U256 {
+        unimplemented!()
+    }
+    fn block_base_fee_per_gas(&self) -> U256 {
+        unimplemented!()
+    }
+    fn chain_id(&self) -> U256 {
+        unimplemented!()
+    }
+}
+
+impl RuntimeBaseBackend for UnimplementedHandler {
+    fn balance(&self, _address: H160) -> U256 {
+        unimplemented!()
+    }
+    fn code_size(&self, _address: H160) -> U256 {
+        unimplemented!()
+    }
+    fn code_hash(&self, _address: H160) -> H256 {
+        unimplemented!()
+    }
+    fn code(&self, _address: H160) -> Vec<u8> {
+        unimplemented!()
+    }
+    fn storage(&self, _address: H160, _index: H256) -> H256 {
+        unimplemented!()
+    }
+
+    fn exists(&self, _address: H160) -> bool {
+        unimplemented!()
+    }
+
+    fn nonce(&self, _address: H160) -> U256 {
+        unimplemented!()
+    }
+}
+
+impl RuntimeBackend for UnimplementedHandler {
+    fn original_storage(&self, _address: H160, _index: H256) -> H256 {
+        unimplemented!()
+    }
+
+    fn deleted(&self, _address: H160) -> bool {
+        unimplemented!()
+    }
+    fn is_cold(&self, _address: H160, _index: Option<H256>) -> bool {
+        unimplemented!()
+    }
+
+    fn mark_hot(&mut self, _address: H160, _index: Option<H256>) {
+        unimplemented!()
+    }
+
+    fn set_storage(&mut self, _address: H160, _index: H256, _value: H256) -> Result<(), ExitError> {
+        unimplemented!()
+    }
+    fn log(&mut self, _log: Log) -> Result<(), ExitError> {
+        unimplemented!()
+    }
+    fn mark_delete(&mut self, _address: H160) {
+        unimplemented!()
+    }
+
+    fn reset_storage(&mut self, _address: H160) {
+        unimplemented!()
+    }
+
+    fn set_code(&mut self, _address: H160, _code: Vec<u8>) -> Result<(), ExitError> {
+        unimplemented!()
+    }
+    fn reset_balance(&mut self, _address: H160) {
+        unimplemented!()
+    }
+
+    fn deposit(&mut self, _address: H160, _value: U256) {
+        unimplemented!()
+    }
+    fn withdrawal(&mut self, _address: H160, _value: U256) -> Result<(), ExitError> {
+        unimplemented!()
+    }
+
+    fn inc_nonce(&mut self, _address: H160) -> Result<(), ExitError> {
+        unimplemented!()
+    }
+}
+
+#[derive(Clone)]
+pub struct PreparedEvm {
+    pub valids: Valids,
+    pub vm: Machine<RuntimeState>,
+}
+
+pub fn prepare(code: Vec<u8>, data: Vec<u8>) -> PreparedEvm {
+    let state = RuntimeState {
+        context: Context {
+            address: H160::default(),
+            caller: H160::default(),
+            apparent_value: U256::default(),
+        },
+        transaction_context: TransactionContext {
+            gas_price: U256::default(),
+            origin: H160::default(),
+        }
+        .into(),
+        retbuf: Vec::new(),
+    };
+
+    PreparedEvm {
+        valids: Valids::new(&code[..]),
+        vm: evm_interpreter::Machine::new(code.into(), data.to_vec().into(), 1024, 0xFFFF, state),
+    }
+}
+
+pub fn execute(pre: PreparedEvm) -> Vec<u8> {
+    let mut vm = EtableInterpreter::new_valid(pre.vm, &RUNTIME_ETABLE, pre.valids);
+    vm.run(&mut UnimplementedHandler {})
+        .exit()
+        .unwrap()
+        .unwrap();
+
+    vm.retval.clone()
+}