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better substate reverting

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This commit is contained in:
debris 2016-01-15 00:54:19 +01:00
parent a97a4a9bc4
commit 821b3b3b75
1 changed files with 16 additions and 19 deletions
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35
src/executive.rs
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@ -212,12 +212,15 @@ impl<'a> Executive<'a> {
} else if params.code.len() > 0 {
// if destination is a contract, do normal message call
// part of substate that may be reverted
let mut unconfirmed_substate = Substate::new();
let res = {
let mut ext = Externalities::from_executive(self, params, substate, OutputPolicy::Return(output));
let mut ext = Externalities::from_executive(self, params, &mut unconfirmed_substate, OutputPolicy::Return(output));
let evm = Factory::create();
evm.exec(&params, &mut ext)
};
self.revert_if_needed(&res, substate, backup);
self.revert_if_needed(&res, substate, unconfirmed_substate, backup);
res
} else {
// otherwise, nothing
@ -232,6 +235,9 @@ impl<'a> Executive<'a> {
// backup used in case of running out of gas
let backup = self.state.clone();
// part of substate that may be reverted
let mut unconfirmed_substate = Substate::new();
// at first create new contract
self.state.new_contract(&params.address);
@ -239,11 +245,11 @@ impl<'a> Executive<'a> {
self.state.transfer_balance(&params.sender, &params.address, &params.value);
let res = {
let mut ext = Externalities::from_executive(self, params, substate, OutputPolicy::InitContract);
let mut ext = Externalities::from_executive(self, params, &mut unconfirmed_substate, OutputPolicy::InitContract);
let evm = Factory::create();
evm.exec(&params, &mut ext)
};
self.revert_if_needed(&res, substate, backup);
self.revert_if_needed(&res, substate, unconfirmed_substate, backup);
res
}
@ -300,15 +306,14 @@ impl<'a> Executive<'a> {
}
}
fn revert_if_needed(&mut self, result: &evm::Result, substate: &mut Substate, backup: State) {
fn revert_if_needed(&mut self, result: &evm::Result, substate: &mut Substate, un_substate: Substate, backup: State) {
// TODO: handle other evm::Errors same as OutOfGas once they are implemented
match result {
&Err(evm::Error::OutOfGas) => {
substate.out_of_gas = true;
self.state.revert(backup);
},
&Err(evm::Error::Internal) => (),
&Ok(_) => ()
&Ok(_) | &Err(evm::Error::Internal) => substate.accrue(un_substate)
}
}
}
@ -417,12 +422,8 @@ impl<'a> Ext for Externalities<'a> {
let mut ex = Executive::from_parent(self.state, self.info, self.engine, self.depth);
ex.state.inc_nonce(&self.params.address);
let mut substate = Substate::new();
match ex.create(&params, &mut substate) {
Ok(gas_left) => {
self.substate.accrue(substate);
(gas_left, Some(address))
},
match ex.create(&params, self.substate) {
Ok(gas_left) => (gas_left, Some(address)),
_ => (U256::zero(), None)
}
}
@ -472,12 +473,8 @@ impl<'a> Ext for Externalities<'a> {
};
let mut ex = Executive::from_parent(self.state, self.info, self.engine, self.depth);
let mut substate = Substate::new();
match ex.call(&params, &mut substate, BytesRef::Fixed(output)) {
Ok(gas_left) => {
self.substate.accrue(substate);
Ok((gas + gas_left, true))
},
match ex.call(&params, self.substate, BytesRef::Fixed(output)) {
Ok(gas_left) => Ok((gas + gas_left, true)),
_ => Ok((gas, false))
}
}