131 lines
3.9 KiB
Rust
131 lines
3.9 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Execution environment substate.
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use common::*;
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/// State changes which should be applied in finalize,
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/// after transaction is fully executed.
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#[derive(Debug)]
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pub struct Substate {
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/// Any accounts that have suicided.
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pub suicides: HashSet<Address>,
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/// Any logs.
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pub logs: Vec<LogEntry>,
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/// Refund counter of SSTORE nonzero -> zero.
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pub sstore_clears_count: U256,
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/// Created contracts.
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pub contracts_created: Vec<Address>,
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/// The trace during this execution or `None` if we're not tracing.
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pub subtraces: Option<Vec<Trace>>,
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}
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impl Substate {
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/// Creates new substate.
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pub fn new(tracing: bool) -> Self {
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Substate {
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suicides: Default::default(),
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logs: Default::default(),
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sstore_clears_count: Default::default(),
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contracts_created: Default::default(),
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subtraces: if tracing {Some(vec![])} else {None},
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}
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}
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/// Merge secondary substate `s` into self, accruing each element correspondingly.
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pub fn accrue(&mut self, s: Substate, maybe_info: Option<(TraceAction, usize)>) {
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self.suicides.extend(s.suicides.into_iter());
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self.logs.extend(s.logs.into_iter());
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self.sstore_clears_count = self.sstore_clears_count + s.sstore_clears_count;
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self.contracts_created.extend(s.contracts_created.into_iter());
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if let Some(info) = maybe_info {
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self.subtraces.as_mut().expect("maybe_action is Some: so we must be tracing: qed").push(Trace {
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action: info.0,
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depth: info.1,
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subs: s.subtraces.expect("maybe_action is Some: so we must be tracing: qed"),
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});
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}
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}
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}
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impl TraceAction {
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/// Compose a `TraceAction` from an `ActionParams`, knowing that the action is a call.
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pub fn from_call(p: &ActionParams) -> TraceAction {
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TraceAction::Call(TraceCall {
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from: p.sender.clone(),
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to: p.address.clone(),
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value: match p.value { ActionValue::Transfer(ref x) | ActionValue::Apparent(ref x) => x.clone() },
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gas: p.gas.clone(),
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input: p.data.clone().unwrap_or(vec![]),
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result: None,
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})
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}
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/// Compose a `TraceAction` from an `ActionParams`, knowing that the action is a create.
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pub fn from_create(p: &ActionParams) -> TraceAction {
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TraceAction::Create(TraceCreate {
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from: p.sender.clone(),
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value: match p.value { ActionValue::Transfer(ref x) | ActionValue::Apparent(ref x) => x.clone() },
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gas: p.gas.clone(),
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init: p.code.clone().unwrap_or(vec![]),
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result: None,
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})
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use common::*;
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#[test]
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fn created() {
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let sub_state = Substate::new(false);
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assert_eq!(sub_state.suicides.len(), 0);
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}
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#[test]
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fn accrue() {
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let mut sub_state = Substate::new(false);
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sub_state.contracts_created.push(address_from_u64(1u64));
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sub_state.logs.push(LogEntry {
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address: address_from_u64(1u64),
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topics: vec![],
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data: vec![]
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});
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sub_state.sstore_clears_count = x!(5);
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sub_state.suicides.insert(address_from_u64(10u64));
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let mut sub_state_2 = Substate::new(false);
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sub_state_2.contracts_created.push(address_from_u64(2u64));
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sub_state_2.logs.push(LogEntry {
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address: address_from_u64(1u64),
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topics: vec![],
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data: vec![]
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});
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sub_state_2.sstore_clears_count = x!(7);
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sub_state.accrue(sub_state_2, None);
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assert_eq!(sub_state.contracts_created.len(), 2);
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assert_eq!(sub_state.sstore_clears_count, x!(12));
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assert_eq!(sub_state.suicides.len(), 1);
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}
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}
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