openethereum/ethcore/src/tests/helpers.rs

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// 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/>.
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use client::{BlockChainClient, Client, ClientConfig};
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use common::*;
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use spec::*;
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use blockchain::{BlockChain, BlockChainConfig};
use state::*;
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use evm::{Schedule, Factory};
use engine::*;
use ethereum;
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use devtools::*;
#[cfg(feature = "json-tests")]
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pub enum ChainEra {
Frontier,
Homestead,
}
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#[cfg(test)]
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pub struct GuardedTempResult<T> {
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result: Option<T>,
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_temp: RandomTempPath
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}
impl<T> GuardedTempResult<T> {
pub fn reference(&self) -> &T {
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self.result.as_ref().unwrap()
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}
pub fn reference_mut(&mut self) -> &mut T {
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self.result.as_mut().unwrap()
}
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pub fn take(&mut self) -> T {
self.result.take().unwrap()
}
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}
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pub struct TestEngine {
factory: Factory,
spec: Spec,
max_depth: usize
}
impl TestEngine {
pub fn new(max_depth: usize, factory: Factory) -> TestEngine {
TestEngine {
factory: factory,
spec: ethereum::new_frontier_test(),
max_depth: max_depth
}
}
}
impl Engine for TestEngine {
fn name(&self) -> &str { "TestEngine" }
fn spec(&self) -> &Spec { &self.spec }
fn vm_factory(&self) -> &Factory {
&self.factory
}
fn schedule(&self, _env_info: &EnvInfo) -> Schedule {
let mut schedule = Schedule::new_frontier();
schedule.max_depth = self.max_depth;
schedule
}
}
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pub fn get_test_spec() -> Spec {
Spec::new_test()
}
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pub fn create_test_block(header: &Header) -> Bytes {
let mut rlp = RlpStream::new_list(3);
rlp.append(header);
rlp.append_raw(&rlp::EMPTY_LIST_RLP, 1);
rlp.append_raw(&rlp::EMPTY_LIST_RLP, 1);
rlp.out()
}
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fn create_unverifiable_block_header(order: u32, parent_hash: H256) -> Header {
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let mut header = Header::new();
header.gas_limit = x!(0);
header.difficulty = x!(order * 100);
header.timestamp = (order * 10) as u64;
header.number = order as u64;
header.parent_hash = parent_hash;
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header.state_root = H256::zero();
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header
}
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fn create_unverifiable_block_with_extra(order: u32, parent_hash: H256, extra: Option<Bytes>) -> Bytes {
let mut header = create_unverifiable_block_header(order, parent_hash);
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header.extra_data = match extra {
Some(extra_data) => extra_data,
None => {
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let base = (order & 0x000000ff) as u8;
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let generated: Vec<u8> = vec![base + 1, base + 2, base + 3];
generated
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}
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};
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create_test_block(&header)
}
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fn create_unverifiable_block(order: u32, parent_hash: H256) -> Bytes {
create_test_block(&create_unverifiable_block_header(order, parent_hash))
}
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pub fn create_test_block_with_data(header: &Header, transactions: &[&SignedTransaction], uncles: &[Header]) -> Bytes {
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let mut rlp = RlpStream::new_list(3);
rlp.append(header);
rlp.begin_list(transactions.len());
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for t in transactions {
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rlp.append_raw(&encode::<SignedTransaction>(t).to_vec(), 1);
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}
rlp.append(&uncles);
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rlp.out()
}
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pub fn generate_dummy_client(block_number: u32) -> GuardedTempResult<Arc<Client>> {
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let dir = RandomTempPath::new();
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let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), IoChannel::disconnected()).unwrap();
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let test_spec = get_test_spec();
let test_engine = test_spec.to_engine().unwrap();
let state_root = test_engine.spec().genesis_header().state_root;
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let mut rolling_hash = test_engine.spec().genesis_header().hash();
let mut rolling_block_number = 1;
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let mut rolling_timestamp = 40;
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for _ in 0..block_number {
let mut header = Header::new();
header.gas_limit = decode(test_engine.spec().engine_params.get("minGasLimit").unwrap());
header.difficulty = decode(test_engine.spec().engine_params.get("minimumDifficulty").unwrap());
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header.timestamp = rolling_timestamp;
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header.number = rolling_block_number;
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header.parent_hash = rolling_hash;
header.state_root = state_root.clone();
rolling_hash = header.hash();
rolling_block_number = rolling_block_number + 1;
rolling_timestamp = rolling_timestamp + 10;
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if let Err(e) = client.import_block(create_test_block(&header)) {
panic!("error importing block which is valid by definition: {:?}", e);
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}
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}
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client.flush_queue();
client.import_verified_blocks(&IoChannel::disconnected());
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GuardedTempResult::<Arc<Client>> {
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_temp: dir,
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result: Some(client)
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}
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}
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pub fn push_blocks_to_client(client: &Arc<Client>, timestamp_salt: u64, starting_number: usize, block_number: usize) {
let test_spec = get_test_spec();
let test_engine = test_spec.to_engine().unwrap();
let state_root = test_engine.spec().genesis_header().state_root;
let mut rolling_hash = client.chain_info().best_block_hash;
let mut rolling_block_number = starting_number as u64;
let mut rolling_timestamp = timestamp_salt + starting_number as u64 * 10;
for _ in 0..block_number {
let mut header = Header::new();
header.gas_limit = decode(test_engine.spec().engine_params.get("minGasLimit").unwrap());
header.difficulty = decode(test_engine.spec().engine_params.get("minimumDifficulty").unwrap());
header.timestamp = rolling_timestamp;
header.number = rolling_block_number;
header.parent_hash = rolling_hash;
header.state_root = state_root.clone();
rolling_hash = header.hash();
rolling_block_number = rolling_block_number + 1;
rolling_timestamp = rolling_timestamp + 10;
if let Err(e) = client.import_block(create_test_block(&header)) {
panic!("error importing block which is valid by definition: {:?}", e);
}
}
}
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pub fn get_test_client_with_blocks(blocks: Vec<Bytes>) -> GuardedTempResult<Arc<Client>> {
let dir = RandomTempPath::new();
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let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), IoChannel::disconnected()).unwrap();
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for block in &blocks {
if let Err(_) = client.import_block(block.clone()) {
panic!("panic importing block which is well-formed");
}
}
client.flush_queue();
client.import_verified_blocks(&IoChannel::disconnected());
GuardedTempResult::<Arc<Client>> {
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_temp: dir,
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result: Some(client)
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}
}
pub fn generate_dummy_blockchain(block_number: u32) -> GuardedTempResult<BlockChain> {
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let temp = RandomTempPath::new();
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let bc = BlockChain::new(BlockChainConfig::default(), &create_unverifiable_block(0, H256::zero()), temp.as_path());
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for block_order in 1..block_number {
bc.insert_block(&create_unverifiable_block(block_order, bc.best_block_hash()), vec![]);
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}
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GuardedTempResult::<BlockChain> {
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_temp: temp,
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result: Some(bc)
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}
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}
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pub fn generate_dummy_blockchain_with_extra(block_number: u32) -> GuardedTempResult<BlockChain> {
let temp = RandomTempPath::new();
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let bc = BlockChain::new(BlockChainConfig::default(), &create_unverifiable_block(0, H256::zero()), temp.as_path());
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for block_order in 1..block_number {
bc.insert_block(&create_unverifiable_block_with_extra(block_order, bc.best_block_hash(), None), vec![]);
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}
GuardedTempResult::<BlockChain> {
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_temp: temp,
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result: Some(bc)
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}
}
pub fn generate_dummy_empty_blockchain() -> GuardedTempResult<BlockChain> {
let temp = RandomTempPath::new();
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let bc = BlockChain::new(BlockChainConfig::default(), &create_unverifiable_block(0, H256::zero()), temp.as_path());
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GuardedTempResult::<BlockChain> {
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_temp: temp,
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result: Some(bc)
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}
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}
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pub fn get_temp_journal_db() -> GuardedTempResult<Box<JournalDB>> {
let temp = RandomTempPath::new();
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let journal_db = journaldb::new(temp.as_str(), journaldb::Algorithm::EarlyMerge);
GuardedTempResult {
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_temp: temp,
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result: Some(journal_db)
}
}
pub fn get_temp_state() -> GuardedTempResult<State> {
let temp = RandomTempPath::new();
let journal_db = get_temp_journal_db_in(temp.as_path());
GuardedTempResult {
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_temp: temp,
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result: Some(State::new(journal_db, U256::from(0u8)))
}
}
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pub fn get_temp_journal_db_in(path: &Path) -> Box<JournalDB> {
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journaldb::new(path.to_str().unwrap(), journaldb::Algorithm::EarlyMerge)
}
pub fn get_temp_state_in(path: &Path) -> State {
let journal_db = get_temp_journal_db_in(path);
State::new(journal_db, U256::from(0u8))
}
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pub fn get_good_dummy_block_seq(count: usize) -> Vec<Bytes> {
let test_spec = get_test_spec();
let test_engine = test_spec.to_engine().unwrap();
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get_good_dummy_block_fork_seq(1, count, &test_engine.spec().genesis_header().hash())
}
pub fn get_good_dummy_block_fork_seq(start_number: usize, count: usize, parent_hash: &H256) -> Vec<Bytes> {
let test_spec = get_test_spec();
let test_engine = test_spec.to_engine().unwrap();
let mut rolling_timestamp = start_number as u64 * 10;
let mut parent = *parent_hash;
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let mut r = Vec::new();
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for i in start_number .. start_number + count + 1 {
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let mut block_header = Header::new();
block_header.gas_limit = decode(test_engine.spec().engine_params.get("minGasLimit").unwrap());
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block_header.difficulty = U256::from(i).mul(U256([0, 1, 0, 0]));
block_header.timestamp = rolling_timestamp;
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block_header.number = i as u64;
block_header.parent_hash = parent;
block_header.state_root = test_engine.spec().genesis_header().state_root;
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parent = block_header.hash();
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rolling_timestamp = rolling_timestamp + 10;
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r.push(create_test_block(&block_header));
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}
r
}
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pub fn get_good_dummy_block() -> Bytes {
let mut block_header = Header::new();
let test_spec = get_test_spec();
let test_engine = test_spec.to_engine().unwrap();
block_header.gas_limit = decode(test_engine.spec().engine_params.get("minGasLimit").unwrap());
block_header.difficulty = decode(test_engine.spec().engine_params.get("minimumDifficulty").unwrap());
block_header.timestamp = 40;
block_header.number = 1;
block_header.parent_hash = test_engine.spec().genesis_header().hash();
block_header.state_root = test_engine.spec().genesis_header().state_root;
create_test_block(&block_header)
}
pub fn get_bad_state_dummy_block() -> Bytes {
let mut block_header = Header::new();
let test_spec = get_test_spec();
let test_engine = test_spec.to_engine().unwrap();
block_header.gas_limit = decode(test_engine.spec().engine_params.get("minGasLimit").unwrap());
block_header.difficulty = decode(test_engine.spec().engine_params.get("minimumDifficulty").unwrap());
block_header.timestamp = 40;
block_header.number = 1;
block_header.parent_hash = test_engine.spec().genesis_header().hash();
block_header.state_root = x!(0xbad);
create_test_block(&block_header)
}