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get rid of hidden mutability of Spec (#10904) 

* get rid of hidden mutabilityof Spec

* small cleanups

* fixed SpecHardcodedSync printing
This commit is contained in:
Marek Kotewicz 2019-07-30 12:48:54 +02:00 committed by GitHub
parent 12256a1e97
commit 6c7d0fef4e
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 183 additions and 177 deletions
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8
ethcore/pod/src/state.rs
View File

@ -31,7 +31,9 @@ pub struct PodState(BTreeMap<Address, PodAccount>);
impl PodState {
/// Get the underlying map.
pub fn get(&self) -> &BTreeMap<Address, PodAccount> { &self.0 }
pub fn get(&self) -> &BTreeMap<Address, PodAccount> {
&self.0
}
/// Get the root hash of the trie of the RLP of this.
pub fn root(&self) -> H256 {
@ -39,7 +41,9 @@ impl PodState {
}
/// Drain object to get the underlying map.
pub fn drain(self) -> BTreeMap<Address, PodAccount> { self.0 }
pub fn drain(self) -> BTreeMap<Address, PodAccount> {
self.0
}
}
impl From<ethjson::blockchain::State> for PodState {

1
ethcore/src/json_tests/chain.rs
View File

@ -77,7 +77,6 @@ pub fn json_chain_test<H: FnMut(&str, HookType)>(json_data: &[u8], start_stop_ho
let state = From::from(blockchain.pre_state.clone());
spec.set_genesis_state(state).expect("Failed to overwrite genesis state");
spec.overwrite_genesis_params(genesis);
assert!(spec.is_state_root_valid());
spec
};

329
ethcore/src/spec/spec.rs
View File

@ -16,18 +16,19 @@
//! Parameters for a block chain.
use std::collections::BTreeMap;
use std::io::Read;
use std::path::Path;
use std::sync::Arc;
use std::{
collections::BTreeMap,
fmt,
io::Read,
path::Path,
sync::Arc,
};
use bytes::Bytes;
use ethereum_types::{H256, Bloom, U256, Address};
use ethjson;
use hash::{KECCAK_NULL_RLP, keccak};
use parking_lot::RwLock;
use rlp::{Rlp, RlpStream};
use rustc_hex::{FromHex, ToHex};
use types::{
BlockNumber,
header::Header,
@ -96,6 +97,93 @@ impl<'a, T: AsRef<Path>> From<&'a T> for SpecParams<'a> {
}
}
/// given a pre-constructor state, run all the given constructors and produce a new state and
/// state root.
fn run_constructors<T: Backend>(
genesis_state: &PodState,
constructors: &[(Address, Bytes)],
engine: &Engine,
author: Address,
timestamp: u64,
difficulty: U256,
factories: &Factories,
mut db: T
) -> Result<(H256, T), Error> {
let mut root = KECCAK_NULL_RLP;
// basic accounts in spec.
{
let mut t = factories.trie.create(db.as_hash_db_mut(), &mut root);
for (address, account) in genesis_state.get().iter() {
t.insert(address.as_bytes(), &account.rlp())?;
}
}
for (address, account) in genesis_state.get().iter() {
db.note_non_null_account(address);
account.insert_additional(
&mut *factories.accountdb.create(
db.as_hash_db_mut(),
keccak(address),
),
&factories.trie,
);
}
let start_nonce = engine.account_start_nonce(0);
let mut state = State::from_existing(db, root, start_nonce, factories.clone())?;
// Execute contract constructors.
let env_info = EnvInfo {
number: 0,
author,
timestamp,
difficulty,
last_hashes: Default::default(),
gas_used: U256::zero(),
gas_limit: U256::max_value(),
};
let from = Address::zero();
for &(ref address, ref constructor) in constructors.iter() {
trace!(target: "spec", "run_constructors: Creating a contract at {}.", address);
trace!(target: "spec", " .. root before = {}", state.root());
let params = ActionParams {
code_address: address.clone(),
code_hash: Some(keccak(constructor)),
code_version: U256::zero(),
address: address.clone(),
sender: from.clone(),
origin: from.clone(),
gas: U256::max_value(),
gas_price: Default::default(),
value: ActionValue::Transfer(Default::default()),
code: Some(Arc::new(constructor.clone())),
data: None,
call_type: CallType::None,
params_type: ParamsType::Embedded,
};
let mut substate = Substate::new();
{
let machine = engine.machine();
let schedule = machine.schedule(env_info.number);
let mut exec = Executive::new(&mut state, &env_info, &machine, &schedule);
// failing create is not a bug
if let Err(e) = exec.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer) {
warn!(target: "spec", "Genesis constructor execution at {} failed: {}.", address, e);
}
}
let _ = state.commit()?;
}
Ok(state.drop())
}
/// Parameters for a block chain; includes both those intrinsic to the design of the
/// chain and those to be interpreted by the active chain engine.
pub struct Spec {
@ -137,7 +225,7 @@ pub struct Spec {
constructors: Vec<(Address, Bytes)>,
/// May be prepopulated if we know this in advance.
state_root_memo: RwLock<H256>,
state_root_memo: H256,
/// Genesis state as plain old data.
genesis_state: PodState,
@ -163,13 +251,14 @@ impl Clone for Spec {
seal_rlp: self.seal_rlp.clone(),
hardcoded_sync: self.hardcoded_sync.clone(),
constructors: self.constructors.clone(),
state_root_memo: RwLock::new(*self.state_root_memo.read()),
state_root_memo: self.state_root_memo,
genesis_state: self.genesis_state.clone(),
}
}
}
/// Part of `Spec`. Describes the hardcoded synchronization parameters.
#[derive(Debug, Clone)]
pub struct SpecHardcodedSync {
/// Header of the block to jump to for hardcoded sync, and total difficulty.
pub header: encoded::Header,
@ -180,34 +269,26 @@ pub struct SpecHardcodedSync {
pub chts: Vec<H256>,
}
impl SpecHardcodedSync {
/// Turns this specifications back into JSON. Useful for pretty printing.
pub fn to_json(self) -> ethjson::spec::HardcodedSync {
self.into()
}
}
#[cfg(test)]
impl Clone for SpecHardcodedSync {
fn clone(&self) -> SpecHardcodedSync {
impl From<ethjson::spec::HardcodedSync> for SpecHardcodedSync {
fn from(sync: ethjson::spec::HardcodedSync) -> Self {
SpecHardcodedSync {
header: self.header.clone(),
total_difficulty: self.total_difficulty.clone(),
chts: self.chts.clone(),
}
}
}
impl From<SpecHardcodedSync> for ethjson::spec::HardcodedSync {
fn from(sync: SpecHardcodedSync) -> ethjson::spec::HardcodedSync {
ethjson::spec::HardcodedSync {
header: sync.header.into_inner().to_hex(),
total_difficulty: ethjson::uint::Uint(sync.total_difficulty),
header: encoded::Header::new(sync.header.into()),
total_difficulty: sync.total_difficulty.into(),
chts: sync.chts.into_iter().map(Into::into).collect(),
}
}
}
impl fmt::Display for SpecHardcodedSync {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
writeln!(f, "{{")?;
writeln!(f, r#"header": "{:?},"#, self.header)?;
writeln!(f, r#"total_difficulty": "{:?},"#, self.total_difficulty)?;
writeln!(f, r#"chts": {:#?}"#, self.chts.iter().map(|x| format!(r#"{}"#, x)).collect::<Vec<_>>())?;
writeln!(f, "}}")
}
}
fn load_machine_from(s: ethjson::spec::Spec) -> Machine {
let builtins = s.accounts.builtins().into_iter().map(|p| (p.0.into(), From::from(p.1))).collect();
let params = CommonParams::from(s.params);
@ -226,59 +307,51 @@ fn load_from(spec_params: SpecParams, s: ethjson::spec::Spec) -> Result<Spec, Er
let GenericSeal(seal_rlp) = g.seal.into();
let params = CommonParams::from(s.params);
let hardcoded_sync = if let Some(ref hs) = s.hardcoded_sync {
if let Ok(header) = hs.header.from_hex() {
Some(SpecHardcodedSync {
header: encoded::Header::new(header),
total_difficulty: hs.total_difficulty.into(),
chts: s.hardcoded_sync
.as_ref()
.map(|s| s.chts.iter().map(|c| c.clone().into()).collect())
.unwrap_or_default()
})
} else {
None
}
} else {
None
};
let hardcoded_sync = s.hardcoded_sync.map(Into::into);
let mut s = Spec {
let engine = Spec::engine(spec_params, s.engine, params, builtins);
let author = g.author;
let timestamp = g.timestamp;
let difficulty = g.difficulty;
let constructors: Vec<_> = s.accounts
.constructors()
.into_iter()
.map(|(a, c)| (a.into(), c.into()))
.collect();
let genesis_state: PodState = s.accounts.into();
let (state_root_memo, _) = run_constructors(
&genesis_state,
&constructors,
&*engine,
author,
timestamp,
difficulty,
&Default::default(),
BasicBackend(journaldb::new_memory_db()),
)?;
let s = Spec {
engine,
name: s.name.clone().into(),
engine: Spec::engine(spec_params, s.engine, params, builtins),
data_dir: s.data_dir.unwrap_or(s.name).into(),
nodes: s.nodes.unwrap_or_else(Vec::new),
parent_hash: g.parent_hash,
transactions_root: g.transactions_root,
receipts_root: g.receipts_root,
author: g.author,
difficulty: g.difficulty,
author,
difficulty,
gas_limit: g.gas_limit,
gas_used: g.gas_used,
timestamp: g.timestamp,
timestamp,
extra_data: g.extra_data,
seal_rlp,
hardcoded_sync,
constructors: s.accounts
.constructors()
.into_iter()
.map(|(a, c)| (a.into(), c.into()))
.collect(),
state_root_memo: RwLock::new(Default::default()), // will be overwritten right after.
genesis_state: s.accounts.into(),
constructors,
genesis_state,
state_root_memo,
};
// use memoized state root if provided.
match g.state_root {
Some(root) => *s.state_root_memo.get_mut() = root,
None => {
let _ = s.run_constructors(
&Default::default(),
BasicBackend(journaldb::new_memory_db()),
)?;
}
}
Ok(s)
}
@ -337,95 +410,9 @@ impl Spec {
}
}
// given a pre-constructor state, run all the given constructors and produce a new state and
// state root.
fn run_constructors<T: Backend>(&self, factories: &Factories, mut db: T) -> Result<T, Error> {
let mut root = KECCAK_NULL_RLP;
// basic accounts in spec.
{
let mut t = factories.trie.create(db.as_hash_db_mut(), &mut root);
for (address, account) in self.genesis_state.get().iter() {
t.insert(address.as_bytes(), &account.rlp())?;
}
}
for (address, account) in self.genesis_state.get().iter() {
db.note_non_null_account(address);
account.insert_additional(
&mut *factories.accountdb.create(
db.as_hash_db_mut(),
keccak(address),
),
&factories.trie,
);
}
let start_nonce = self.engine.account_start_nonce(0);
let (root, db) = {
let mut state = State::from_existing(db, root, start_nonce, factories.clone())?;
// Execute contract constructors.
let env_info = EnvInfo {
number: 0,
author: self.author,
timestamp: self.timestamp,
difficulty: self.difficulty,
last_hashes: Default::default(),
gas_used: U256::zero(),
gas_limit: U256::max_value(),
};
let from = Address::zero();
for &(ref address, ref constructor) in self.constructors.iter() {
trace!(target: "spec", "run_constructors: Creating a contract at {}.", address);
trace!(target: "spec", " .. root before = {}", state.root());
let params = ActionParams {
code_address: address.clone(),
code_hash: Some(keccak(constructor)),
code_version: U256::zero(),
address: address.clone(),
sender: from.clone(),
origin: from.clone(),
gas: U256::max_value(),
gas_price: Default::default(),
value: ActionValue::Transfer(Default::default()),
code: Some(Arc::new(constructor.clone())),
data: None,
call_type: CallType::None,
params_type: ParamsType::Embedded,
};
let mut substate = Substate::new();
{
let machine = self.engine.machine();
let schedule = machine.schedule(env_info.number);
let mut exec = Executive::new(&mut state, &env_info, &machine, &schedule);
if let Err(e) = exec.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer) {
warn!(target: "spec", "Genesis constructor execution at {} failed: {}.", address, e);
}
}
if let Err(e) = state.commit() {
warn!(target: "spec", "Genesis constructor trie commit at {} failed: {}.", address, e);
}
trace!(target: "spec", " .. root after = {}", state.root());
}
state.drop()
};
*self.state_root_memo.write() = root;
Ok(db)
}
/// Return the state root for the genesis state, memoising accordingly.
pub fn state_root(&self) -> H256 {
self.state_root_memo.read().clone()
self.state_root_memo
}
/// Get common blockchain parameters.
@ -511,11 +498,18 @@ impl Spec {
/// Alter the value of the genesis state.
pub fn set_genesis_state(&mut self, s: PodState) -> Result<(), Error> {
self.genesis_state = s;
let _ = self.run_constructors(
let (root, _) = run_constructors(
&self.genesis_state,
&self.constructors,
&*self.engine,
self.author,
self.timestamp,
self.difficulty,
&Default::default(),
BasicBackend(journaldb::new_memory_db()),
)?;
self.state_root_memo = root;
Ok(())
}
@ -524,14 +518,6 @@ impl Spec {
&self.genesis_state
}
/// Returns `false` if the memoized state root is invalid. `true` otherwise.
pub fn is_state_root_valid(&self) -> bool {
// TODO: get rid of this function and ensure state root always is valid.
// we're mostly there, but `self.genesis_state.root()` doesn't encompass
// post-constructor state.
*self.state_root_memo.read() == self.genesis_state.root()
}
/// Ensure that the given state DB has the trie nodes in for the genesis state.
pub fn ensure_db_good<T: Backend>(&self, db: T, factories: &Factories) -> Result<T, Error> {
if db.as_hash_db().contains(&self.state_root(), hash_db::EMPTY_PREFIX) {
@ -540,7 +526,18 @@ impl Spec {
// TODO: could optimize so we don't re-run, but `ensure_db_good` is barely ever
// called anyway.
let db = self.run_constructors(factories, db)?;
let (root, db) = run_constructors(
&self.genesis_state,
&self.constructors,
&*self.engine,
self.author,
self.timestamp,
self.difficulty,
factories,
db
)?;
assert_eq!(root, self.state_root(), "Spec's state root has not been precomputed correctly.");
Ok(db)
}

12
json/src/bytes.rs
View File

@ -34,9 +34,15 @@ impl Bytes {
}
}
impl Into<Vec<u8>> for Bytes {
fn into(self) -> Vec<u8> {
self.0
impl From<Bytes> for Vec<u8> {
fn from(bytes: Bytes) -> Self {
bytes.0
}
}
impl From<Vec<u8>> for Bytes {
fn from(bytes: Vec<u8>) -> Self {
Bytes(bytes)
}
}

7
json/src/spec/hardcoded_sync.rs
View File

@ -18,14 +18,15 @@
use hash::H256;
use uint::Uint;
use bytes::Bytes;
/// Spec hardcoded sync.
#[derive(Debug, PartialEq, Serialize, Deserialize)]
#[derive(Debug, PartialEq, Deserialize)]
#[serde(deny_unknown_fields)]
#[serde(rename_all = "camelCase")]
pub struct HardcodedSync {
/// Hexadecimal of the RLP encoding of the header of the block to start synchronization from.
pub header: String,
pub header: Bytes,
/// Total difficulty including the block of `header`.
pub total_difficulty: Uint,
/// Ordered trie roots of blocks before and including `header`.
@ -54,7 +55,7 @@ mod tests {
}"#;
let deserialized: HardcodedSync = serde_json::from_str(s).unwrap();
assert_eq!(deserialized, HardcodedSync {
header: String::from("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"),
header: "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".parse().unwrap(),
total_difficulty: Uint(U256::from(0x400000000u64)),
chts: vec![
H256(Eth256::from_str("11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa").unwrap()),

2
parity/export_hardcoded_sync.rs
View File

@ -96,7 +96,7 @@ pub fn execute(cmd: ExportHsyncCmd) -> Result<String, String> {
let hs = service.client().read_hardcoded_sync()
.map_err(|e| format!("Error reading hardcoded sync: {}", e))?;
if let Some(hs) = hs {
Ok(::serde_json::to_string_pretty(&hs.to_json()).expect("generated JSON is always valid"))
Ok(format!("{}", hs))
} else {
Err("Error: cannot generate hardcoded sync because the database is empty.".into())
}

1
rpc/src/v1/tests/eth.rs
View File

@ -68,7 +68,6 @@ fn make_spec(chain: &BlockChain) -> Spec {
let state = chain.pre_state.clone().into();
spec.set_genesis_state(state).expect("unable to set genesis state");
spec.overwrite_genesis_params(genesis);
assert!(spec.is_state_root_valid());
spec
}