mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-14 23:45:44 +00:00
Shawn Tabrizi
130 lines
4.1 KiB
Rust
130 lines
4.1 KiB
Rust
// Copyright 2020 Parity Technologies (UK) Ltd.
|
|
// This file is part of Polkadot.
|
|
|
|
// Polkadot 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.
|
|
|
|
// Polkadot 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 Polkadot. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
//! An implementation of the `RewardValidators` trait used by `inclusion` that employs
|
|
//! `pallet-staking` to compute the rewards.
|
|
//!
|
|
//! Based on https://w3f-research.readthedocs.io/en/latest/polkadot/Token%20Economics.html
|
|
//! which doesn't currently mention availability bitfields. As such, we don't reward them
|
|
//! for the time being, although we will build schemes to do so in the future.
|
|
|
|
use primitives::v1::ValidatorIndex;
|
|
use pallet_staking::SessionInterface;
|
|
use crate::shared;
|
|
|
|
/// The amount of era points given by backing a candidate that is included.
|
|
pub const BACKING_POINTS: u32 = 20;
|
|
|
|
/// Rewards validators for participating in parachains with era points in pallet-staking.
|
|
pub struct RewardValidatorsWithEraPoints<C>(sp_std::marker::PhantomData<C>);
|
|
|
|
fn validators_to_reward<C, T, I>(validators: &'_ [T], indirect_indices: I) -> impl IntoIterator<Item=&'_ T> where
|
|
C: shared::Config,
|
|
I: IntoIterator<Item = ValidatorIndex>
|
|
{
|
|
let validator_indirection = <shared::Module<C>>::active_validator_indices();
|
|
|
|
indirect_indices.into_iter()
|
|
.filter_map(move |i| validator_indirection.get(i.0 as usize).map(|v| v.clone()))
|
|
.filter_map(move |i| validators.get(i.0 as usize))
|
|
}
|
|
|
|
impl<C> crate::inclusion::RewardValidators for RewardValidatorsWithEraPoints<C>
|
|
where C: pallet_staking::Config + shared::Config,
|
|
{
|
|
fn reward_backing(indirect_indices: impl IntoIterator<Item=ValidatorIndex>) {
|
|
// Fetch the validators from the _session_ because sessions are offset from eras
|
|
// and we are rewarding for behavior in current session.
|
|
let validators = C::SessionInterface::validators();
|
|
|
|
let rewards = validators_to_reward::<C, _, _>(&validators, indirect_indices)
|
|
.into_iter()
|
|
.map(|v| (v.clone(), BACKING_POINTS));
|
|
|
|
<pallet_staking::Pallet<C>>::reward_by_ids(rewards);
|
|
}
|
|
|
|
fn reward_bitfields(_validators: impl IntoIterator<Item=ValidatorIndex>) { }
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use primitives::v1::ValidatorId;
|
|
use crate::configuration::HostConfiguration;
|
|
use crate::mock::{new_test_ext, MockGenesisConfig, Shared, Test};
|
|
use keyring::Sr25519Keyring;
|
|
|
|
#[test]
|
|
fn rewards_based_on_indirection() {
|
|
let validators = vec![
|
|
Sr25519Keyring::Alice,
|
|
Sr25519Keyring::Bob,
|
|
Sr25519Keyring::Charlie,
|
|
Sr25519Keyring::Dave,
|
|
Sr25519Keyring::Ferdie,
|
|
];
|
|
|
|
fn validator_pubkeys(val_ids: &[Sr25519Keyring]) -> Vec<ValidatorId> {
|
|
val_ids.iter().map(|v| v.public().into()).collect()
|
|
}
|
|
|
|
new_test_ext(MockGenesisConfig::default()).execute_with(|| {
|
|
let mut config = HostConfiguration::default();
|
|
config.max_validators = None;
|
|
|
|
let pubkeys = validator_pubkeys(&validators);
|
|
|
|
let shuffled_pubkeys = Shared::initializer_on_new_session(
|
|
1,
|
|
[1; 32],
|
|
&config,
|
|
pubkeys,
|
|
);
|
|
|
|
assert_eq!(
|
|
shuffled_pubkeys,
|
|
validator_pubkeys(&[
|
|
Sr25519Keyring::Ferdie,
|
|
Sr25519Keyring::Bob,
|
|
Sr25519Keyring::Charlie,
|
|
Sr25519Keyring::Dave,
|
|
Sr25519Keyring::Alice,
|
|
])
|
|
);
|
|
|
|
assert_eq!(
|
|
Shared::active_validator_indices(),
|
|
vec![
|
|
ValidatorIndex(4),
|
|
ValidatorIndex(1),
|
|
ValidatorIndex(2),
|
|
ValidatorIndex(3),
|
|
ValidatorIndex(0),
|
|
]
|
|
);
|
|
|
|
assert_eq!(
|
|
validators_to_reward::<Test, _, _>(
|
|
&validators,
|
|
vec![ValidatorIndex(0), ValidatorIndex(1), ValidatorIndex(2)],
|
|
).into_iter().copied().collect::<Vec<_>>(),
|
|
vec![Sr25519Keyring::Ferdie, Sr25519Keyring::Bob, Sr25519Keyring::Charlie],
|
|
);
|
|
})
|
|
}
|
|
}
|