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use util::*;
use builtin::Builtin;
use engines::{Engine, NullEngine, InstantSeal, BasicAuthority, AuthorityRound, Tendermint};
use factory::Factories;
use executive::Executive;
use trace::{NoopTracer, NoopVMTracer};
use action_params::{ActionValue, ActionParams};
use types::executed::CallType;
use state::{State, Substate};
use env_info::EnvInfo;
use pod_state::*;
use account_db::*;
use header::{BlockNumber, Header};
use state_db::StateDB;
use super::genesis::Genesis;
use super::seal::Generic as GenericSeal;
use ethereum;
use ethjson;
use rlp::{Rlp, RlpStream, View, Stream};
#[derive(Debug, PartialEq, Clone, Default)]
pub struct CommonParams {
pub account_start_nonce: U256,
pub maximum_extra_data_size: usize,
pub network_id: u64,
pub chain_id: u64,
pub subprotocol_name: String,
pub min_gas_limit: U256,
pub fork_block: Option<(BlockNumber, H256)>,
pub eip98_transition: BlockNumber,
}
impl From<ethjson::spec::Params> for CommonParams {
fn from(p: ethjson::spec::Params) -> Self {
CommonParams {
account_start_nonce: p.account_start_nonce.map_or_else(U256::zero, Into::into),
maximum_extra_data_size: p.maximum_extra_data_size.into(),
network_id: p.network_id.into(),
chain_id: if let Some(n) = p.chain_id { n.into() } else { p.network_id.into() },
subprotocol_name: p.subprotocol_name.unwrap_or_else(|| "eth".to_owned()),
min_gas_limit: p.min_gas_limit.into(),
fork_block: if let (Some(n), Some(h)) = (p.fork_block, p.fork_hash) { Some((n.into(), h.into())) } else { None },
eip98_transition: p.eip98_transition.map_or(0, Into::into),
}
}
}
pub struct Spec {
pub name: String,
pub engine: Arc<Engine>,
pub data_dir: String,
pub nodes: Vec<String>,
pub params: CommonParams,
pub parent_hash: H256,
pub author: Address,
pub difficulty: U256,
pub gas_limit: U256,
pub gas_used: U256,
pub timestamp: u64,
pub transactions_root: H256,
pub receipts_root: H256,
pub extra_data: Bytes,
pub seal_rlp: Bytes,
constructors: Vec<(Address, Bytes)>,
state_root_memo: RwLock<Option<H256>>,
genesis_state: PodState,
}
impl From<ethjson::spec::Spec> for Spec {
fn from(s: ethjson::spec::Spec) -> Self {
let builtins = s.accounts.builtins().into_iter().map(|p| (p.0.into(), From::from(p.1))).collect();
let g = Genesis::from(s.genesis);
let GenericSeal(seal_rlp) = g.seal.into();
let params = CommonParams::from(s.params);
Spec {
name: s.name.clone().into(),
params: params.clone(),
engine: Spec::engine(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,
gas_limit: g.gas_limit,
gas_used: g.gas_used,
timestamp: g.timestamp,
extra_data: g.extra_data,
seal_rlp: seal_rlp,
constructors: s.accounts.constructors().into_iter().map(|(a, c)| (a.into(), c.into())).collect(),
state_root_memo: RwLock::new(g.state_root),
genesis_state: From::from(s.accounts),
}
}
}
macro_rules! load_bundled {
($e:expr) => {
Spec::load(include_bytes!(concat!("../../res/", $e, ".json")) as &[u8]).expect(concat!("Chain spec ", $e, " is invalid."))
};
}
impl Spec {
fn engine(engine_spec: ethjson::spec::Engine, params: CommonParams, builtins: BTreeMap<Address, Builtin>) -> Arc<Engine> {
match engine_spec {
ethjson::spec::Engine::Null => Arc::new(NullEngine::new(params, builtins)),
ethjson::spec::Engine::InstantSeal => Arc::new(InstantSeal::new(params, builtins)),
ethjson::spec::Engine::Ethash(ethash) => Arc::new(ethereum::Ethash::new(params, From::from(ethash.params), builtins)),
ethjson::spec::Engine::BasicAuthority(basic_authority) => Arc::new(BasicAuthority::new(params, From::from(basic_authority.params), builtins)),
ethjson::spec::Engine::AuthorityRound(authority_round) => AuthorityRound::new(params, From::from(authority_round.params), builtins).expect("Failed to start AuthorityRound consensus engine."),
ethjson::spec::Engine::Tendermint(tendermint) => Tendermint::new(params, From::from(tendermint.params), builtins).expect("Failed to start the Tendermint consensus engine."),
}
}
pub fn state_root(&self) -> H256 {
if self.state_root_memo.read().is_none() {
*self.state_root_memo.write() = Some(self.genesis_state.root());
}
self.state_root_memo.read().as_ref().cloned()
.expect("state root memo ensured to be set at this point; qed")
}
pub fn nodes(&self) -> &[String] { &self.nodes }
pub fn network_id(&self) -> u64 { self.params.network_id }
pub fn subprotocol_name(&self) -> String { self.params.subprotocol_name.clone() }
pub fn fork_block(&self) -> Option<(BlockNumber, H256)> { self.params.fork_block }
pub fn genesis_header(&self) -> Header {
let mut header: Header = Default::default();
header.set_parent_hash(self.parent_hash.clone());
header.set_timestamp(self.timestamp);
header.set_number(0);
header.set_author(self.author.clone());
header.set_transactions_root(self.transactions_root.clone());
header.set_uncles_hash(RlpStream::new_list(0).out().sha3());
header.set_extra_data(self.extra_data.clone());
header.set_state_root(self.state_root());
header.set_receipts_root(self.receipts_root.clone());
header.set_log_bloom(H2048::new().clone());
header.set_gas_used(self.gas_used.clone());
header.set_gas_limit(self.gas_limit.clone());
header.set_difficulty(self.difficulty.clone());
header.set_seal({
let r = Rlp::new(&self.seal_rlp);
r.iter().map(|f| f.as_raw().to_vec()).collect()
});
trace!(target: "spec", "Header hash is {}", header.hash());
header
}
pub fn genesis_block(&self) -> Bytes {
let empty_list = RlpStream::new_list(0).out();
let header = self.genesis_header();
let mut ret = RlpStream::new_list(3);
ret.append(&header);
ret.append_raw(&empty_list, 1);
ret.append_raw(&empty_list, 1);
ret.out()
}
pub fn overwrite_genesis_params(&mut self, g: Genesis) {
let GenericSeal(seal_rlp) = g.seal.into();
self.parent_hash = g.parent_hash;
self.transactions_root = g.transactions_root;
self.receipts_root = g.receipts_root;
self.author = g.author;
self.difficulty = g.difficulty;
self.gas_limit = g.gas_limit;
self.gas_used = g.gas_used;
self.timestamp = g.timestamp;
self.extra_data = g.extra_data;
self.seal_rlp = seal_rlp;
self.state_root_memo = RwLock::new(g.state_root);
}
pub fn set_genesis_state(&mut self, s: PodState) {
self.genesis_state = s;
*self.state_root_memo.write() = None;
}
pub fn is_state_root_valid(&self) -> bool {
self.state_root_memo.read().clone().map_or(true, |sr| sr == self.genesis_state.root())
}
pub fn ensure_db_good(&self, mut db: StateDB, factories: &Factories) -> Result<StateDB, Box<TrieError>> {
if db.as_hashdb().contains(&self.state_root()) {
return Ok(db)
}
trace!(target: "spec", "ensure_db_good: Fresh database? Cannot find state root {}", self.state_root());
let mut root = H256::new();
{
let mut t = factories.trie.create(db.as_hashdb_mut(), &mut root);
for (address, account) in self.genesis_state.get().iter() {
t.insert(&**address, &account.rlp())?;
}
}
trace!(target: "spec", "ensure_db_good: Populated sec trie; root is {}", root);
for (address, account) in self.genesis_state.get().iter() {
db.note_non_null_account(address);
account.insert_additional(&mut AccountDBMut::new(db.as_hashdb_mut(), address), &factories.trie);
}
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::default();
let start_nonce = self.engine.account_start_nonce();
let mut state = State::from_existing(db, root, start_nonce, factories.clone())?;
for &(ref address, ref constructor) in self.constructors.iter() {
trace!(target: "spec", "ensure_db_good: Creating a contract at {}.", address);
let params = ActionParams {
code_address: address.clone(),
code_hash: constructor.sha3(),
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,
};
let mut substate = Substate::new();
{
let mut exec = Executive::new(&mut state, &env_info, self.engine.as_ref(), &factories.vm);
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);
}
}
let (root, db) = state.drop();
*self.state_root_memo.write() = Some(root);
Ok(db)
}
pub fn load<R>(reader: R) -> Result<Self, String> where R: Read {
match ethjson::spec::Spec::load(reader) {
Ok(spec) => Ok(spec.into()),
_ => Err("Spec json is invalid".into()),
}
}
pub fn new_test() -> Spec { load_bundled!("null_morden") }
pub fn new_null() -> Spec { load_bundled!("null") }
pub fn new_test_constructor() -> Spec { load_bundled!("constructor") }
pub fn new_instant() -> Spec { load_bundled!("instant_seal") }
pub fn new_test_round() -> Self { load_bundled!("authority_round") }
pub fn new_test_tendermint() -> Self { load_bundled!("tendermint") }
pub fn new_validator_safe_contract() -> Self { load_bundled!("validator_safe_contract") }
pub fn new_validator_contract() -> Self { load_bundled!("validator_contract") }
}
#[cfg(test)]
mod tests {
use util::*;
use views::*;
use tests::helpers::get_temp_state_db;
use state::State;
use super::*;
#[test]
fn test_load_empty() {
assert!(Spec::load(&[] as &[u8]).is_err());
}
#[test]
fn test_chain() {
let test_spec = Spec::new_test();
assert_eq!(test_spec.state_root(), H256::from_str("f3f4696bbf3b3b07775128eb7a3763279a394e382130f27c21e70233e04946a9").unwrap());
let genesis = test_spec.genesis_block();
assert_eq!(BlockView::new(&genesis).header_view().sha3(), H256::from_str("0cd786a2425d16f152c658316c423e6ce1181e15c3295826d7c9904cba9ce303").unwrap());
}
#[test]
fn genesis_constructor() {
let spec = Spec::new_test_constructor();
let mut db_result = get_temp_state_db();
let db = spec.ensure_db_good(db_result.take(), &Default::default()).unwrap();
let state = State::from_existing(db.boxed_clone(), spec.state_root(), spec.engine.account_start_nonce(), Default::default()).unwrap();
let expected = H256::from_str("0000000000000000000000000000000000000000000000000000000000000001").unwrap();
assert_eq!(state.storage_at(&Address::from_str("0000000000000000000000000000000000000005").unwrap(), &H256::zero()), expected);
}
}