136 lines
3.7 KiB
Rust
136 lines
3.7 KiB
Rust
// Copyright 2015-2017 Parity Technologies (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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//! VM runner.
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use std::time::{Instant, Duration};
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use bigint::prelude::U256;
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use bigint::hash::H256;
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use ethcore::{trace, spec, transaction, pod_state};
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use ethcore::client::{self, EvmTestClient, EvmTestError, TransactResult};
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use ethjson;
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/// VM execution informant
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pub trait Informant: trace::VMTracer {
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/// Display a single run init message
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fn before_test(&self, test: &str, action: &str);
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/// Set initial gas.
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fn set_gas(&mut self, _gas: U256) {}
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/// Display final result.
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fn finish(result: Result<Success, Failure>);
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}
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/// Execution finished correctly
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pub struct Success {
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/// Used gas
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pub gas_used: U256,
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/// Output as bytes
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pub output: Vec<u8>,
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/// Time Taken
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pub time: Duration,
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}
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/// Execution failed
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pub struct Failure {
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/// Used gas
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pub gas_used: U256,
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/// Internal error
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pub error: EvmTestError,
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/// Duration
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pub time: Duration,
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}
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/// Execute given Transaction and verify resulting state root.
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pub fn run_transaction<T: Informant>(
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name: &str,
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idx: usize,
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spec: ðjson::state::test::ForkSpec,
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pre_state: &pod_state::PodState,
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post_root: H256,
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env_info: &client::EnvInfo,
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transaction: transaction::SignedTransaction,
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mut informant: T,
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) {
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let spec_name = format!("{:?}", spec).to_lowercase();
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let spec = match EvmTestClient::spec_from_json(spec) {
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Some(spec) => {
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informant.before_test(&format!("{}:{}:{}", name, spec_name, idx), "starting");
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spec
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},
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None => {
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informant.before_test(&format!("{}:{}:{}", name, spec_name, idx), "skipping because of missing spec");
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return;
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},
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};
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informant.set_gas(env_info.gas_limit);
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let result = run(spec, env_info.gas_limit, pre_state, |mut client| {
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let result = client.transact(env_info, transaction, informant);
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match result {
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TransactResult::Ok { state_root, .. } if state_root != post_root => {
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Err(EvmTestError::PostCondition(format!(
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"State root mismatch (got: {}, expected: {})",
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state_root,
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post_root,
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)))
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},
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TransactResult::Ok { gas_left, output, .. } => {
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Ok((gas_left, output))
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},
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TransactResult::Err { error, .. } => {
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Err(EvmTestError::PostCondition(format!(
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"Unexpected execution error: {:?}", error
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)))
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},
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}
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});
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T::finish(result)
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}
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/// Execute VM with given `ActionParams`
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pub fn run<'a, F, T>(spec: &'a spec::Spec, initial_gas: U256, pre_state: T, run: F) -> Result<Success, Failure> where
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F: FnOnce(EvmTestClient) -> Result<(U256, Vec<u8>), EvmTestError>,
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T: Into<Option<&'a pod_state::PodState>>,
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{
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let test_client = match pre_state.into() {
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Some(pre_state) => EvmTestClient::from_pod_state(spec, pre_state.clone()),
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None => EvmTestClient::new(spec),
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}.map_err(|error| Failure {
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gas_used: 0.into(),
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error,
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time: Duration::from_secs(0)
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})?;
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let start = Instant::now();
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let result = run(test_client);
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let duration = start.elapsed();
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match result {
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Ok((gas_left, output)) => Ok(Success {
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gas_used: initial_gas - gas_left,
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output: output,
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time: duration,
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}),
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Err(e) => Err(Failure {
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gas_used: initial_gas,
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error: e,
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time: duration,
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}),
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}
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}
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