openethereum/ethcore/src/substate.rs
2016-02-03 13:20:32 +01:00

62 lines
1.7 KiB
Rust

//! 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 accrue() {
let mut sub_state = Substate::new();
sub_state.contracts_created.push(address_from_u64(1u64));
sub_state.logs.push(LogEntry::new(address_from_u64(1u64), vec![], 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::new(address_from_u64(1u64), vec![], 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);
}
}