grassrootseconomics/openethereum
5
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

delete old test

Browse Source
This commit is contained in:
keorn 2016-08-23 15:44:01 +02:00
parent 3aa862c9c2
commit 535c502771
2 changed files with 0 additions and 355 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

296
ethcore/src/engines/bft.rs
View File

@ -1,296 +0,0 @@
// 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/>.
//! A blockchain engine that supports a basic, non-BFT proof-of-authority.
use common::*;
use account_provider::AccountProvider;
use block::*;
use spec::CommonParams;
use engines::Engine;
use evm::Schedule;
use ethjson;
/// `BFT` params.
#[derive(Debug)]
pub struct BFTParams {
/// Gas limit divisor.
pub gas_limit_bound_divisor: U256,
/// Block duration.
pub duration_limit: u64,
/// Validators.
pub validators: Vec<Address>,
/// Number of validators.
pub validator_n: usize,
/// Precommit step votes.
precommits: RwLock<HashMap<H256, HashSet<Signature>>>
}
impl From<ethjson::spec::BFTParams> for BFTParams {
fn from(p: ethjson::spec::BFTParams) -> Self {
let val = p.validators.into_iter().map(Into::into).collect::<Vec<_>>();
BFTParams {
gas_limit_bound_divisor: p.gas_limit_bound_divisor.into(),
duration_limit: p.duration_limit.into(),
validator_n: val.len(),
validators: val,
precommits: RwLock::new(HashMap::new())
}
}
}
/// Engine using `BFT` consensus algorithm, suitable for EVM chain.
pub struct BFT {
params: CommonParams,
our_params: BFTParams,
builtins: BTreeMap<Address, Builtin>,
}
impl BFT {
/// Create a new instance of BFT engine
pub fn new(params: CommonParams, our_params: BFTParams, builtins: BTreeMap<Address, Builtin>) -> Self {
BFT {
params: params,
our_params: our_params,
builtins: builtins,
}
}
fn add_precommit(&self, bare_hash: &H256, signature: &Signature) {
if let Some(mut precommits) = self.our_params.precommits.write().get_mut(bare_hash) {
precommits.insert(signature.clone());
} else {
let mut new = HashSet::new();
new.insert(signature.clone());
assert!(self.our_params.precommits.write().insert(bare_hash.clone(), new).is_none());
}
}
fn check_precommit(&self, bare_hash: &H256, signature: &Signature) -> result::Result<(), Error> {
let signer = Address::from(try!(ec::recover(&signature, bare_hash)).sha3());
match self.our_params.validators.contains(&signer) {
false => try!(Err(BlockError::InvalidSeal)),
true => Ok(()),
}
}
fn supermajority(&self) -> usize { 2*self.our_params.validator_n/3 }
fn signatures_seal(&self, signatures: &HashSet<Signature>) -> Vec<Bytes> {
signatures.iter().map(|sig| encode(&(&*sig as &[u8])).to_vec()).collect()
}
}
impl Engine for BFT {
fn name(&self) -> &str { "BFT" }
fn version(&self) -> SemanticVersion { SemanticVersion::new(1, 0, 0) }
/// Possibly signatures of all validators.
fn seal_fields(&self) -> usize { self.our_params.validator_n }
fn params(&self) -> &CommonParams { &self.params }
fn builtins(&self) -> &BTreeMap<Address, Builtin> { &self.builtins }
/// Additional engine-specific information for the user/developer concerning `header`.
fn extra_info(&self, _header: &Header) -> HashMap<String, String> { hash_map!["signature".to_owned() => "TODO".to_owned()] }
fn schedule(&self, _env_info: &EnvInfo) -> Schedule {
Schedule::new_homestead()
}
fn populate_from_parent(&self, header: &mut Header, parent: &Header, gas_floor_target: U256, _gas_ceil_target: U256) {
header.difficulty = parent.difficulty;
header.gas_limit = {
let gas_limit = parent.gas_limit;
let bound_divisor = self.our_params.gas_limit_bound_divisor;
if gas_limit < gas_floor_target {
min(gas_floor_target, gas_limit + gas_limit / bound_divisor - 1.into())
} else {
max(gas_floor_target, gas_limit - gas_limit / bound_divisor + 1.into())
}
};
header.note_dirty();
}
/// Apply the block reward on finalisation of the block.
/// This assumes that all uncles are valid uncles (i.e. of at least one generation before the current).
fn on_close_block(&self, _block: &mut ExecutedBlock) {}
/// Attempt to seal the block internally using all available signatures.
///
/// None is returned if not enough signatures can be collected.
fn generate_seal(&self, block: &ExecutedBlock, accounts: Option<&AccountProvider>) -> Option<Vec<Bytes>> {
let hash = block.header().bare_hash();
let guard = self.our_params.precommits.read();
let signatures = guard.get(&hash).unwrap_or(return None);
let threshold = self.supermajority();
match (signatures.len(), accounts) {
(v, Some(ap)) if v == threshold-1 => {
// account should be pernamently unlocked, otherwise signing will fail
if let Ok(signature) = ap.sign(*block.header().author(), hash) {
self.add_precommit(&hash, &signature.into());
Some(self.signatures_seal(signatures))
} else {
trace!(target: "bft", "generate_seal: FAIL: secret key unavailable");
None
}
},
(v, _) if v < threshold => None,
_ => Some(block.header().seal.clone()),
}
}
fn verify_block_basic(&self, header: &Header, _block: Option<&[u8]>) -> result::Result<(), Error> {
// check the seal fields.
// TODO: pull this out into common code.
if header.seal.len() != self.seal_fields() {
return Err(From::from(BlockError::InvalidSealArity(
Mismatch { expected: self.seal_fields(), found: header.seal.len() }
)));
}
Ok(())
}
fn verify_block_unordered(&self, header: &Header, _block: Option<&[u8]>) -> result::Result<(), Error> {
let hash = header.bare_hash();
let threshold = self.supermajority();
let guard = self.our_params.precommits.read();
let mut signatures = guard.get(&hash).unwrap_or(try!(Err(BlockError::InvalidSeal)));
if signatures.len() > threshold { return Ok(()) }
// Count all valid precommits.
for seal_field in header.seal() {
let sig = try!(UntrustedRlp::new(&seal_field).as_val::<Signature>());
if !signatures.contains(&sig) || self.check_precommit(&hash, &sig).is_ok() {
trace!(target: "bft", "verify_block_unordered: new validator vote found");
self.add_precommit(&hash, &sig);
if signatures.len() > threshold { return Ok(()) }
}
}
try!(Err(BlockError::InvalidSeal))
}
fn verify_block_family(&self, header: &Header, parent: &Header, _block: Option<&[u8]>) -> result::Result<(), Error> {
// we should not calculate difficulty for genesis blocks
if header.number() == 0 {
return Err(From::from(BlockError::RidiculousNumber(OutOfBounds { min: Some(1), max: None, found: header.number() })));
}
// Check difficulty is correct given the two timestamps.
if header.difficulty() != parent.difficulty() {
return Err(From::from(BlockError::InvalidDifficulty(Mismatch { expected: *parent.difficulty(), found: *header.difficulty() })))
}
let gas_limit_divisor = self.our_params.gas_limit_bound_divisor;
let min_gas = parent.gas_limit - parent.gas_limit / gas_limit_divisor;
let max_gas = parent.gas_limit + parent.gas_limit / gas_limit_divisor;
if header.gas_limit <= min_gas || header.gas_limit >= max_gas {
return Err(From::from(BlockError::InvalidGasLimit(OutOfBounds { min: Some(min_gas), max: Some(max_gas), found: header.gas_limit })));
}
Ok(())
}
fn verify_transaction_basic(&self, t: &SignedTransaction, _header: &Header) -> result::Result<(), Error> {
try!(t.check_low_s());
Ok(())
}
fn verify_transaction(&self, t: &SignedTransaction, _header: &Header) -> Result<(), Error> {
t.sender().map(|_|()) // Perform EC recovery and cache sender
}
}
#[cfg(test)]
mod tests {
use common::*;
use block::*;
use tests::helpers::*;
use account_provider::AccountProvider;
use spec::Spec;
/// Create a new test chain spec with `BFT` consensus engine.
fn new_test_authority() -> Spec { Spec::load(include_bytes!("../../res/test_authority.json")) }
#[test]
fn has_valid_metadata() {
let engine = new_test_authority().engine;
assert!(!engine.name().is_empty());
assert!(engine.version().major >= 1);
}
#[test]
fn can_return_schedule() {
let engine = new_test_authority().engine;
let schedule = engine.schedule(&EnvInfo {
number: 10000000,
author: 0.into(),
timestamp: 0,
difficulty: 0.into(),
last_hashes: Arc::new(vec![]),
gas_used: 0.into(),
gas_limit: 0.into(),
});
assert!(schedule.stack_limit > 0);
}
#[test]
fn can_do_seal_verification_fail() {
let engine = new_test_authority().engine;
let header: Header = Header::default();
let verify_result = engine.verify_block_basic(&header, None);
match verify_result {
Err(Error::Block(BlockError::InvalidSealArity(_))) => {},
Err(_) => { panic!("should be block seal-arity mismatch error (got {:?})", verify_result); },
_ => { panic!("Should be error, got Ok"); },
}
}
#[test]
fn can_do_signature_verification_fail() {
let engine = new_test_authority().engine;
let mut header: Header = Header::default();
header.set_seal(vec![rlp::encode(&Signature::zero()).to_vec()]);
let verify_result = engine.verify_block_unordered(&header, None);
match verify_result {
Err(Error::Util(UtilError::Crypto(CryptoError::InvalidSignature))) => {},
Err(_) => { panic!("should be block difficulty error (got {:?})", verify_result); },
_ => { panic!("Should be error, got Ok"); },
}
}
#[test]
fn can_generate_seal() {
let tap = AccountProvider::transient_provider();
let addr = tap.insert_account("".sha3(), "").unwrap();
tap.unlock_account_permanently(addr, "".into()).unwrap();
let spec = new_test_authority();
let engine = &*spec.engine;
let genesis_header = spec.genesis_header();
let mut db_result = get_temp_journal_db();
let mut db = db_result.take();
spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
let last_hashes = Arc::new(vec![genesis_header.hash()]);
let vm_factory = Default::default();
let b = OpenBlock::new(engine, &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, addr, (3141562.into(), 31415620.into()), vec![]).unwrap();
let b = b.close_and_lock();
let seal = engine.generate_seal(b.block(), Some(&tap)).unwrap();
assert!(b.try_seal(engine, seal).is_ok());
}
}

59
json/src/spec/bft.rs
View File

@ -1,59 +0,0 @@
// 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/>.
//! Authority params deserialization.
use uint::Uint;
use hash::Address;
/// Authority params deserialization.
#[derive(Debug, PartialEq, Deserialize)]
pub struct BFTParams {
/// Gas limit divisor.
#[serde(rename="gasLimitBoundDivisor")]
pub gas_limit_bound_divisor: Uint,
/// Block duration.
#[serde(rename="durationLimit")]
pub duration_limit: Uint,
/// Valid authorities
pub validators: Vec<Address>,
}
/// Authority engine deserialization.
#[derive(Debug, PartialEq, Deserialize)]
pub struct BFT {
/// Ethash params.
pub params: BFTParams,
}
#[cfg(test)]
mod tests {
use serde_json;
use spec::bft::BFT;
#[test]
fn basic_authority_deserialization() {
let s = r#"{
"params": {
"gasLimitBoundDivisor": "0x0400",
"durationLimit": "0x0d",
"validators" : ["0xc6d9d2cd449a754c494264e1809c50e34d64562b"]
}
}"#;
let _deserialized: BFT = serde_json::from_str(s).unwrap();
}
}