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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| #![allow(unused, dead_code)] | ||
|
|
||
| use super::Context; | ||
| use alloy_type_conversions::*; | ||
| use cfx_statedb::Result as DbResult; | ||
| use cfx_types::AddressSpaceUtil; | ||
| use cfx_vm_types::Context as ContextTrait; | ||
| use revm_interpreter::primitives::{Address, Bytes, Env, Log, B256, U256}; | ||
|
|
||
| pub(crate) struct EvmHost<'a> { | ||
| context: Context<'a>, | ||
| error: DbResult<()>, | ||
| } | ||
|
|
||
| impl<'a> EvmHost<'a> { | ||
| pub fn new(context: Context<'a>) -> Self { | ||
| Self { | ||
| context, | ||
| error: Ok(()), | ||
| } | ||
| } | ||
|
|
||
| pub fn take_db_error(&mut self) -> DbResult<()> { | ||
| std::mem::replace(&mut self.error, Ok(())) | ||
| } | ||
| } | ||
|
|
||
| fn unwrap_db_error(e: cfx_vm_types::Error) -> cfx_statedb::Error { | ||
| match e { | ||
| cfx_vm_types::Error::StateDbError(e) => e.0, | ||
| _ => unreachable!(), | ||
| } | ||
| } | ||
|
|
||
| const COLD: bool = true; | ||
|
|
||
| impl<'a> revm_interpreter::Host for EvmHost<'a> { | ||
| fn env(&self) -> &Env { todo!() } | ||
|
|
||
| fn env_mut(&mut self) -> &mut Env { todo!() } | ||
|
|
||
| fn load_account( | ||
| &mut self, address: Address, | ||
| ) -> Option<revm_interpreter::LoadAccountResult> { | ||
| match self | ||
| .context | ||
| .exists_and_not_null(&from_alloy_address(address)) | ||
| { | ||
| Ok(exists) => Some(revm_interpreter::LoadAccountResult { | ||
| is_cold: COLD, | ||
| is_empty: !exists, | ||
| }), | ||
| Err(e) => { | ||
| self.error = Err(unwrap_db_error(e)); | ||
| None | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn block_hash(&mut self, number: U256) -> Option<B256> { | ||
| match self.context.blockhash(&from_alloy_u256(number)) { | ||
| Ok(hash) => Some(to_alloy_h256(hash)), | ||
| Err(e) => { | ||
| self.error = Err(unwrap_db_error(e)); | ||
| None | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn balance(&mut self, address: Address) -> Option<(U256, bool)> { | ||
| match self.context.balance(&from_alloy_address(address)) { | ||
| Ok(balance) => Some((to_alloy_u256(balance), COLD)), | ||
| Err(e) => { | ||
| self.error = Err(unwrap_db_error(e)); | ||
| None | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn code(&mut self, address: Address) -> Option<(Bytes, bool)> { | ||
| match self.context.extcode(&from_alloy_address(address)) { | ||
| Ok(None) => Some((Bytes::new(), COLD)), | ||
| Ok(Some(code)) => Some((Bytes::copy_from_slice(&**code), COLD)), | ||
| Err(e) => { | ||
| self.error = Err(unwrap_db_error(e)); | ||
| None | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn code_hash(&mut self, address: Address) -> Option<(B256, bool)> { | ||
| match self.context.extcodehash(&from_alloy_address(address)) { | ||
| Ok(hash) => Some((to_alloy_h256(hash), COLD)), | ||
| Err(e) => { | ||
| self.error = Err(unwrap_db_error(e)); | ||
| None | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn sload(&mut self, address: Address, index: U256) -> Option<(U256, bool)> { | ||
| let receiver = | ||
| from_alloy_address(address).with_space(self.context.space); | ||
| let key = index.to_be_bytes::<32>(); | ||
| match self.context.state.storage_at(&receiver, &key) { | ||
| Ok(value) => Some((to_alloy_u256(value), COLD)), | ||
| Err(e) => { | ||
| self.error = Err(e); | ||
| None | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn sstore( | ||
| &mut self, address: Address, index: U256, value: U256, | ||
| ) -> Option<revm_interpreter::SStoreResult> { | ||
| // TODO: who checks static flag in revm? | ||
| todo!() | ||
| } | ||
|
|
||
| fn tload(&mut self, address: Address, index: U256) -> U256 { todo!() } | ||
|
|
||
| fn tstore(&mut self, address: Address, index: U256, value: U256) { todo!() } | ||
|
|
||
| fn log(&mut self, log: Log) { todo!() } | ||
|
|
||
| fn selfdestruct( | ||
| &mut self, address: Address, target: Address, | ||
| ) -> Option<revm_interpreter::SelfDestructResult> { | ||
| todo!() | ||
| } | ||
| } |
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