102 lines
3.0 KiB
Rust
102 lines
3.0 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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/// Preconfigured validator list.
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use util::{H256, Address, HeapSizeOf};
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use engines::Call;
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use header::Header;
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use super::ValidatorSet;
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/// Validator set containing a known set of addresses.
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#[derive(Clone, Debug, PartialEq, Eq, Default)]
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pub struct SimpleList {
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validators: Vec<Address>,
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}
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impl SimpleList {
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/// Create a new `SimpleList`.
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pub fn new(validators: Vec<Address>) -> Self {
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SimpleList {
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validators: validators,
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}
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}
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/// Convert into inner representation.
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pub fn into_inner(self) -> Vec<Address> {
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self.validators
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}
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}
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impl HeapSizeOf for SimpleList {
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fn heap_size_of_children(&self) -> usize {
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self.validators.heap_size_of_children()
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}
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}
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impl ValidatorSet for SimpleList {
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fn default_caller(&self, _block_id: ::ids::BlockId) -> Box<Call> {
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Box::new(|_, _| Err("Simple list doesn't require calls.".into()))
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}
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fn is_epoch_end(&self, _header: &Header, _block: Option<&[u8]>, _receipts: Option<&[::receipt::Receipt]>)
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-> ::engines::EpochChange
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{
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::engines::EpochChange::No
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}
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fn epoch_proof(&self, _header: &Header, _caller: &Call) -> Result<Vec<u8>, String> {
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Ok(Vec::new())
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}
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fn epoch_set(&self, _header: &Header, _: &[u8]) -> Result<(u64, SimpleList), ::error::Error> {
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Ok((0, self.clone()))
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}
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fn contains_with_caller(&self, _bh: &H256, address: &Address, _: &Call) -> bool {
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self.validators.contains(address)
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}
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fn get_with_caller(&self, _bh: &H256, nonce: usize, _: &Call) -> Address {
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let validator_n = self.validators.len();
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self.validators.get(nonce % validator_n).expect("There are validator_n authorities; taking number modulo validator_n gives number in validator_n range; qed").clone()
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}
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fn count_with_caller(&self, _bh: &H256, _: &Call) -> usize {
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self.validators.len()
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}
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}
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#[cfg(test)]
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mod tests {
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use std::str::FromStr;
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use util::Address;
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use super::super::ValidatorSet;
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use super::SimpleList;
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#[test]
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fn simple_list() {
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let a1 = Address::from_str("cd1722f3947def4cf144679da39c4c32bdc35681").unwrap();
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let a2 = Address::from_str("0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6").unwrap();
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let list = SimpleList::new(vec![a1.clone(), a2.clone()]);
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assert!(list.contains(&Default::default(), &a1));
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assert_eq!(list.get(&Default::default(), 0), a1);
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assert_eq!(list.get(&Default::default(), 1), a2);
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assert_eq!(list.get(&Default::default(), 2), a1);
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}
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}
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