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Validator/authority contract (#3937)

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* dir

* simple validator list

* stub validator contract

* make the engine hold Weak<Client> instead of IoChannel

* validator set factory

* register weak client with ValidatorContract

* check chain security

* add address array to generator

* register provider contract

* update validator set on notify

* add validator contract spec

* simple list test

* split update and contract test

* contract change

* use client in tendermint

* fix deadlock

* step duration in params

* adapt tendermint tests

* add storage fields to test spec

* constructor spec

* execute under wrong address

* create under correct address

* revert

* validator contract constructor

* move genesis block lookup

* add removal ability to contract

* validator contract adding validators

* fix basic authority

* validator changing test

* more docs

* update sync tests

* remove env_logger

* another env_logger

* cameltoe

* hold EngineClient instead of Client

* add a comment about lock scope
This commit is contained in:
keorn
2017-01-10 12:23:59 +01:00
committed by Arkadiy Paronyan
parent 5c5244911e
commit be30c44179
29 changed files with 749 additions and 314 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
ethcore/src/engines/basic_authority.rs
View File

@@ -16,6 +16,8 @@
//! A blockchain engine that supports a basic, non-BFT proof-of-authority.
use std::sync::Weak;
use util::*;
use ethkey::{recover, public_to_address};
use account_provider::AccountProvider;
use block::*;
@@ -28,26 +30,23 @@ use evm::Schedule;
use ethjson;
use header::Header;
use transaction::SignedTransaction;
use util::*;
use client::Client;
use super::validator_set::{ValidatorSet, new_validator_set};
/// `BasicAuthority` params.
#[derive(Debug, PartialEq)]
pub struct BasicAuthorityParams {
/// Gas limit divisor.
pub gas_limit_bound_divisor: U256,
/// Block duration.
pub duration_limit: u64,
/// Valid signatories.
pub authorities: HashSet<Address>,
pub validators: ethjson::spec::ValidatorSet,
}
impl From<ethjson::spec::BasicAuthorityParams> for BasicAuthorityParams {
fn from(p: ethjson::spec::BasicAuthorityParams) -> Self {
BasicAuthorityParams {
gas_limit_bound_divisor: p.gas_limit_bound_divisor.into(),
duration_limit: p.duration_limit.into(),
authorities: p.authorities.into_iter().map(Into::into).collect::<HashSet<_>>(),
validators: p.validators,
}
}
}
@@ -56,10 +55,11 @@ impl From<ethjson::spec::BasicAuthorityParams> for BasicAuthorityParams {
/// mainnet chains in the Olympic, Frontier and Homestead eras.
pub struct BasicAuthority {
params: CommonParams,
our_params: BasicAuthorityParams,
gas_limit_bound_divisor: U256,
builtins: BTreeMap<Address, Builtin>,
account_provider: Mutex<Option<Arc<AccountProvider>>>,
password: RwLock<Option<String>>,
validators: Box<ValidatorSet + Send + Sync>,
}
impl BasicAuthority {
@@ -67,8 +67,9 @@ impl BasicAuthority {
pub fn new(params: CommonParams, our_params: BasicAuthorityParams, builtins: BTreeMap<Address, Builtin>) -> Self {
BasicAuthority {
params: params,
our_params: our_params,
gas_limit_bound_divisor: our_params.gas_limit_bound_divisor,
builtins: builtins,
validators: new_validator_set(our_params.validators),
account_provider: Mutex::new(None),
password: RwLock::new(None),
}
@@ -95,7 +96,7 @@ impl Engine for BasicAuthority {
header.set_difficulty(parent.difficulty().clone());
header.set_gas_limit({
let gas_limit = parent.gas_limit().clone();
let bound_divisor = self.our_params.gas_limit_bound_divisor;
let bound_divisor = self.gas_limit_bound_divisor;
if gas_limit < gas_floor_target {
min(gas_floor_target, gas_limit + gas_limit / bound_divisor - 1.into())
} else {
@@ -105,22 +106,22 @@ impl Engine for BasicAuthority {
}
fn is_sealer(&self, author: &Address) -> Option<bool> {
Some(self.our_params.authorities.contains(author))
Some(self.validators.contains(author))
}
/// Attempt to seal the block internally.
///
/// This operation is synchronous and may (quite reasonably) not be available, in which `false` will
/// be returned.
fn generate_seal(&self, block: &ExecutedBlock) -> Seal {
if let Some(ref ap) = *self.account_provider.lock() {
let header = block.header();
let message = header.bare_hash();
// account should be pernamently unlocked, otherwise sealing will fail
if let Ok(signature) = ap.sign(*block.header().author(), self.password.read().clone(), message) {
return Seal::Regular(vec![::rlp::encode(&(&*signature as &[u8])).to_vec()]);
} else {
trace!(target: "basicauthority", "generate_seal: FAIL: accounts secret key unavailable");
let author = header.author();
if self.validators.contains(author) {
let message = header.bare_hash();
// account should be pernamently unlocked, otherwise sealing will fail
if let Ok(signature) = ap.sign(*author, self.password.read().clone(), message) {
return Seal::Regular(vec![::rlp::encode(&(&*signature as &[u8])).to_vec()]);
} else {
trace!(target: "basicauthority", "generate_seal: FAIL: accounts secret key unavailable");
}
}
} else {
trace!(target: "basicauthority", "generate_seal: FAIL: accounts not provided");
@@ -145,7 +146,7 @@ impl Engine for BasicAuthority {
// check the signature is legit.
let sig = UntrustedRlp::new(&header.seal()[0]).as_val::<H520>()?;
let signer = public_to_address(&recover(&sig.into(), &header.bare_hash())?);
if !self.our_params.authorities.contains(&signer) {
if !self.validators.contains(&signer) {
return Err(BlockError::InvalidSeal)?;
}
Ok(())
@@ -161,7 +162,7 @@ impl Engine for BasicAuthority {
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 gas_limit_divisor = self.gas_limit_bound_divisor;
let min_gas = parent.gas_limit().clone() - parent.gas_limit().clone() / gas_limit_divisor;
let max_gas = parent.gas_limit().clone() + parent.gas_limit().clone() / gas_limit_divisor;
if header.gas_limit() <= &min_gas || header.gas_limit() >= &max_gas {
@@ -179,6 +180,10 @@ impl Engine for BasicAuthority {
t.sender().map(|_|()) // Perform EC recovery and cache sender
}
fn register_client(&self, client: Weak<Client>) {
self.validators.register_call_contract(client);
}
fn set_signer(&self, _address: Address, password: String) {
*self.password.write() = Some(password);
}