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move genesis_epoch_data function to spec

This commit is contained in:
Robert Habermeier 2017-09-04 12:46:32 +02:00
parent e69e8254db
commit ffde22e711
2 changed files with 58 additions and 58 deletions
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59
ethcore/light/src/client/header_chain.rs
View File

@ -179,63 +179,6 @@ pub struct PendingChanges {
best_block: Option<BlockDescriptor>, // new best block.
}
// initialize genesis epoch data, using in-memory database for
// constructor.
// TODO: move to `Spec`?
fn genesis_epoch_data(spec: &Spec, genesis: &Header) -> Result<Vec<u8>, String> {
use ethcore::state::backend::Basic as BasicBackend;
use ethcore::transaction::{Action, Transaction};
use util::{journaldb, kvdb, Address};
let factories = Default::default();
let mut db = journaldb::new(
Arc::new(kvdb::in_memory(0)),
journaldb::Algorithm::Archive,
None,
);
spec.ensure_db_good(BasicBackend(db.as_hashdb_mut()), &factories)
.map_err(|e| format!("Unable to initialize genesis state: {}", e))?;
let call = |a, d| {
let mut db = db.boxed_clone();
let env_info = ::evm::EnvInfo {
number: 0,
author: *genesis.author(),
timestamp: genesis.timestamp(),
difficulty: *genesis.difficulty(),
gas_limit: *genesis.gas_limit(),
last_hashes: Arc::new(Vec::new()),
gas_used: 0.into()
};
let from = Address::default();
let tx = Transaction {
nonce: spec.engine.account_start_nonce(0),
action: Action::Call(a),
gas: U256::from(50_000_000), // TODO: share with client.
gas_price: U256::default(),
value: U256::default(),
data: d,
}.fake_sign(from);
let res = ::ethcore::state::prove_transaction(
db.as_hashdb_mut(),
*genesis.state_root(),
&tx,
&*spec.engine,
&env_info,
factories.clone(),
true,
);
res.map(|(out, proof)| (out, proof.into_iter().map(|x| x.into_vec()).collect()))
.ok_or_else(|| "Failed to prove call: insufficient state".into())
};
spec.engine.genesis_epoch_data(&genesis, &call)
}
/// Header chain. See module docs for more details.
pub struct HeaderChain {
genesis_header: encoded::Header, // special-case the genesis.
@ -334,7 +277,7 @@ impl HeaderChain {
// instantiate genesis epoch data if it doesn't exist.
if let None = chain.db.get(col, LAST_CANONICAL_TRANSITION)? {
let genesis_data = genesis_epoch_data(spec, &decoded_header)?;
let genesis_data = spec.genesis_epoch_data()?;
{
let mut batch = chain.db.transaction();

57
ethcore/src/spec/spec.rs
View File

@ -481,6 +481,63 @@ impl Spec {
.and_then(|x| load_from(cache_dir, x).map_err(fmt))
}
/// initialize genesis epoch data, using in-memory database for
/// constructor.
pub fn genesis_epoch_data(&self) -> Result<Vec<u8>, String> {
use transaction::{Action, Transaction};
use util::{journaldb, kvdb};
let genesis = self.genesis_header();
let factories = Default::default();
let mut db = journaldb::new(
Arc::new(kvdb::in_memory(0)),
journaldb::Algorithm::Archive,
None,
);
self.ensure_db_good(BasicBackend(db.as_hashdb_mut()), &factories)
.map_err(|e| format!("Unable to initialize genesis state: {}", e))?;
let call = |a, d| {
let mut db = db.boxed_clone();
let env_info = ::evm::EnvInfo {
number: 0,
author: *genesis.author(),
timestamp: genesis.timestamp(),
difficulty: *genesis.difficulty(),
gas_limit: *genesis.gas_limit(),
last_hashes: Arc::new(Vec::new()),
gas_used: 0.into()
};
let from = Address::default();
let tx = Transaction {
nonce: self.engine.account_start_nonce(0),
action: Action::Call(a),
gas: U256::from(50_000_000), // TODO: share with client.
gas_price: U256::default(),
value: U256::default(),
data: d,
}.fake_sign(from);
let res = ::state::prove_transaction(
db.as_hashdb_mut(),
*genesis.state_root(),
&tx,
&*self.engine,
&env_info,
factories.clone(),
true,
);
res.map(|(out, proof)| (out, proof.into_iter().map(|x| x.into_vec()).collect()))
.ok_or_else(|| "Failed to prove call: insufficient state".into())
};
self.engine.genesis_epoch_data(&genesis, &call)
}
/// Create a new Spec which conforms to the Frontier-era Morden chain except that it's a NullEngine consensus.
pub fn new_test() -> Spec { load_bundled!("null_morden") }