582a4ea339
* First draft: pass the parent block header to on_close_block * typos and cleanup * whitespace * Store parent in ClosedBlock as well so it can be reopen()'d * Don't pass parent when reopening a block * Remove the unused ancestry param
109 lines
3.1 KiB
Rust
109 lines
3.1 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
|
|
// This file is part of Parity Ethereum.
|
|
|
|
// Parity Ethereum 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 Ethereum 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 Ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
use engines::Engine;
|
|
use engines::block_reward::{self, RewardKind};
|
|
use ethereum_types::U256;
|
|
use machine::Machine;
|
|
use types::BlockNumber;
|
|
use types::header::{Header, ExtendedHeader};
|
|
use block::ExecutedBlock;
|
|
use error::Error;
|
|
|
|
/// Params for a null engine.
|
|
#[derive(Clone, Default)]
|
|
pub struct NullEngineParams {
|
|
/// base reward for a block.
|
|
pub block_reward: U256,
|
|
}
|
|
|
|
impl From<::ethjson::spec::NullEngineParams> for NullEngineParams {
|
|
fn from(p: ::ethjson::spec::NullEngineParams) -> Self {
|
|
NullEngineParams {
|
|
block_reward: p.block_reward.map_or_else(Default::default, Into::into),
|
|
}
|
|
}
|
|
}
|
|
|
|
/// An engine which does not provide any consensus mechanism and does not seal blocks.
|
|
pub struct NullEngine {
|
|
params: NullEngineParams,
|
|
machine: Machine,
|
|
}
|
|
|
|
impl NullEngine {
|
|
/// Returns new instance of NullEngine with default VM Factory
|
|
pub fn new(params: NullEngineParams, machine: Machine) -> Self {
|
|
NullEngine {
|
|
params,
|
|
machine,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Engine for NullEngine {
|
|
fn name(&self) -> &str {
|
|
"NullEngine"
|
|
}
|
|
|
|
fn machine(&self) -> &Machine { &self.machine }
|
|
|
|
fn on_close_block(
|
|
&self,
|
|
block: &mut ExecutedBlock,
|
|
_parent_header: &Header
|
|
) -> Result<(), Error> {
|
|
use std::ops::Shr;
|
|
|
|
let author = *block.header.author();
|
|
let number = block.header.number();
|
|
|
|
let reward = self.params.block_reward;
|
|
if reward == U256::zero() { return Ok(()) }
|
|
|
|
let n_uncles = block.uncles.len();
|
|
|
|
let mut rewards = Vec::new();
|
|
|
|
// Bestow block reward
|
|
let result_block_reward = reward + reward.shr(5) * U256::from(n_uncles);
|
|
rewards.push((author, RewardKind::Author, result_block_reward));
|
|
|
|
// bestow uncle rewards.
|
|
for u in &block.uncles {
|
|
let uncle_author = u.author();
|
|
let result_uncle_reward = (reward * U256::from(8 + u.number() - number)).shr(3);
|
|
rewards.push((*uncle_author, RewardKind::uncle(number, u.number()), result_uncle_reward));
|
|
}
|
|
|
|
block_reward::apply_block_rewards(&rewards, block, &self.machine)
|
|
}
|
|
|
|
fn maximum_uncle_count(&self, _block: BlockNumber) -> usize { 2 }
|
|
|
|
fn verify_local_seal(&self, _header: &Header) -> Result<(), Error> {
|
|
Ok(())
|
|
}
|
|
|
|
fn snapshot_components(&self) -> Option<Box<dyn (::snapshot::SnapshotComponents)>> {
|
|
Some(Box::new(::snapshot::PowSnapshot::new(10000, 10000)))
|
|
}
|
|
|
|
fn fork_choice(&self, new: &ExtendedHeader, current: &ExtendedHeader) -> super::ForkChoice {
|
|
super::total_difficulty_fork_choice(new, current)
|
|
}
|
|
}
|