openethereum/ethcore/src/engines/instant_seal.rs

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// 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/>.
use std::collections::BTreeMap;
use util::Address;
use builtin::Builtin;
use engines::Engine;
use env_info::EnvInfo;
use spec::CommonParams;
use evm::Schedule;
use block::ExecutedBlock;
use util::Bytes;
use account_provider::AccountProvider;
/// An engine which does not provide any consensus mechanism, just seals blocks internally.
pub struct InstantSeal {
params: CommonParams,
builtins: BTreeMap<Address, Builtin>,
}
impl InstantSeal {
/// Returns new instance of InstantSeal with default VM Factory
pub fn new(params: CommonParams, builtins: BTreeMap<Address, Builtin>) -> Self {
InstantSeal {
params: params,
builtins: builtins,
}
}
}
impl Engine for InstantSeal {
fn name(&self) -> &str {
"InstantSeal"
}
fn params(&self) -> &CommonParams {
&self.params
}
fn builtins(&self) -> &BTreeMap<Address, Builtin> {
&self.builtins
}
fn schedule(&self, _env_info: &EnvInfo) -> Schedule {
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Schedule::new_post_eip150(usize::max_value(), false, false, false)
}
fn is_sealer(&self, _author: &Address) -> Option<bool> { Some(true) }
fn generate_seal(&self, _block: &ExecutedBlock, _accounts: Option<&AccountProvider>) -> Option<Vec<Bytes>> {
Some(Vec::new())
}
}
#[cfg(test)]
mod tests {
use util::*;
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use util::trie::TrieSpec;
use tests::helpers::*;
use account_provider::AccountProvider;
use spec::Spec;
use header::Header;
use block::*;
#[test]
fn instant_can_seal() {
let tap = AccountProvider::transient_provider();
let addr = tap.insert_account("".sha3(), "").unwrap();
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let spec = Spec::new_instant();
let engine = &*spec.engine;
let genesis_header = spec.genesis_header();
let mut db_result = get_temp_state_db();
let mut db = db_result.take();
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spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
let last_hashes = Arc::new(vec![genesis_header.hash()]);
let b = OpenBlock::new(engine, Default::default(), false, db, &genesis_header, last_hashes, addr, (3141562.into(), 31415620.into()), vec![]).unwrap();
let b = b.close_and_lock();
// Seal with empty AccountProvider.
let seal = engine.generate_seal(b.block(), Some(&tap)).unwrap();
assert!(b.try_seal(engine, seal).is_ok());
}
#[test]
fn instant_cant_verify() {
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let engine = Spec::new_instant().engine;
let mut header: Header = Header::default();
assert!(engine.verify_block_basic(&header, None).is_ok());
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header.set_seal(vec![::rlp::encode(&H520::default()).to_vec()]);
assert!(engine.verify_block_unordered(&header, None).is_ok());
}
}