openethereum/ethcore/src/substate.rs

92 lines
2.6 KiB
Rust

// Copyright 2015, 2016 Ethcore (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Execution environment substate.
use common::*;
/// State changes which should be applied in finalize,
/// after transaction is fully executed.
#[derive(Debug)]
pub struct Substate {
/// Any accounts that have suicided.
pub suicides: HashSet<Address>,
/// Any logs.
pub logs: Vec<LogEntry>,
/// Refund counter of SSTORE nonzero -> zero.
pub sstore_clears_count: U256,
/// Created contracts.
pub contracts_created: Vec<Address>
}
impl Substate {
/// Creates new substate.
pub fn new() -> Self {
Substate {
suicides: HashSet::new(),
logs: vec![],
sstore_clears_count: U256::zero(),
contracts_created: vec![]
}
}
/// Merge secondary substate `s` into self, accruing each element correspondingly.
pub fn accrue(&mut self, s: Substate) {
self.suicides.extend(s.suicides.into_iter());
self.logs.extend(s.logs.into_iter());
self.sstore_clears_count = self.sstore_clears_count + s.sstore_clears_count;
self.contracts_created.extend(s.contracts_created.into_iter());
}
}
#[cfg(test)]
mod tests {
use super::*;
use common::*;
#[test]
fn created() {
let sub_state = Substate::new();
assert_eq!(sub_state.suicides.len(), 0);
}
#[test]
fn accrue() {
let mut sub_state = Substate::new();
sub_state.contracts_created.push(address_from_u64(1u64));
sub_state.logs.push(LogEntry {
address: address_from_u64(1u64),
topics: vec![],
data: vec![]
});
sub_state.sstore_clears_count = x!(5);
sub_state.suicides.insert(address_from_u64(10u64));
let mut sub_state_2 = Substate::new();
sub_state_2.contracts_created.push(address_from_u64(2u64));
sub_state_2.logs.push(LogEntry {
address: address_from_u64(1u64),
topics: vec![],
data: vec![]
});
sub_state_2.sstore_clears_count = x!(7);
sub_state.accrue(sub_state_2);
assert_eq!(sub_state.contracts_created.len(), 2);
assert_eq!(sub_state.sstore_clears_count, x!(12));
assert_eq!(sub_state.suicides.len(), 1);
}
}