mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-05-30 07:01:03 +00:00
Keith Yeung
137 lines
4.1 KiB
Rust
137 lines
4.1 KiB
Rust
// Copyright 2020 Parity Technologies (UK) Ltd.
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// This file is part of Polkadot.
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// Polkadot 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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// Polkadot 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 Polkadot. If not, see <http://www.gnu.org/licenses/>.
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//! An implementation of the `RewardValidators` trait used by `inclusion` that employs
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//! `pallet-staking` to compute the rewards.
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//!
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//! Based on https://research.web3.foundation/en/latest/polkadot/overview/2-token-economics.html
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//! which doesn't currently mention availability bitfields. As such, we don't reward them
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//! for the time being, although we will build schemes to do so in the future.
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use crate::shared;
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use pallet_staking::SessionInterface;
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use primitives::v1::ValidatorIndex;
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/// The amount of era points given by backing a candidate that is included.
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pub const BACKING_POINTS: u32 = 20;
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/// Rewards validators for participating in parachains with era points in pallet-staking.
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pub struct RewardValidatorsWithEraPoints<C>(sp_std::marker::PhantomData<C>);
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fn validators_to_reward<C, T, I>(
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validators: &'_ [T],
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indirect_indices: I,
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) -> impl IntoIterator<Item = &'_ T>
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where
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C: shared::Config,
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I: IntoIterator<Item = ValidatorIndex>,
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{
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let validator_indirection = <shared::Pallet<C>>::active_validator_indices();
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indirect_indices
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.into_iter()
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.filter_map(move |i| validator_indirection.get(i.0 as usize).map(|v| v.clone()))
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.filter_map(move |i| validators.get(i.0 as usize))
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}
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impl<C> crate::inclusion::RewardValidators for RewardValidatorsWithEraPoints<C>
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where
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C: pallet_staking::Config + shared::Config,
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{
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fn reward_backing(indirect_indices: impl IntoIterator<Item = ValidatorIndex>) {
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// Fetch the validators from the _session_ because sessions are offset from eras
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// and we are rewarding for behavior in current session.
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let validators = C::SessionInterface::validators();
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let rewards = validators_to_reward::<C, _, _>(&validators, indirect_indices)
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.into_iter()
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.map(|v| (v.clone(), BACKING_POINTS));
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<pallet_staking::Pallet<C>>::reward_by_ids(rewards);
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}
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fn reward_bitfields(_validators: impl IntoIterator<Item = ValidatorIndex>) {}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::{
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configuration::HostConfiguration,
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mock::{new_test_ext, MockGenesisConfig, ParasShared, Test},
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};
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use keyring::Sr25519Keyring;
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use primitives::v1::ValidatorId;
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#[test]
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fn rewards_based_on_indirection() {
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let validators = vec![
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Sr25519Keyring::Alice,
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Sr25519Keyring::Bob,
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Sr25519Keyring::Charlie,
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Sr25519Keyring::Dave,
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Sr25519Keyring::Ferdie,
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];
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fn validator_pubkeys(val_ids: &[Sr25519Keyring]) -> Vec<ValidatorId> {
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val_ids.iter().map(|v| v.public().into()).collect()
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}
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new_test_ext(MockGenesisConfig::default()).execute_with(|| {
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let mut config = HostConfiguration::default();
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config.max_validators = None;
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let pubkeys = validator_pubkeys(&validators);
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let shuffled_pubkeys =
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ParasShared::initializer_on_new_session(1, [1; 32], &config, pubkeys);
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assert_eq!(
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shuffled_pubkeys,
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validator_pubkeys(&[
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Sr25519Keyring::Ferdie,
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Sr25519Keyring::Bob,
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Sr25519Keyring::Charlie,
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Sr25519Keyring::Dave,
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Sr25519Keyring::Alice,
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])
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);
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assert_eq!(
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ParasShared::active_validator_indices(),
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vec![
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ValidatorIndex(4),
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ValidatorIndex(1),
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ValidatorIndex(2),
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ValidatorIndex(3),
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ValidatorIndex(0),
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]
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);
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assert_eq!(
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validators_to_reward::<Test, _, _>(
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&validators,
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vec![ValidatorIndex(0), ValidatorIndex(1), ValidatorIndex(2)],
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)
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.into_iter()
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.copied()
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.collect::<Vec<_>>(),
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vec![Sr25519Keyring::Ferdie, Sr25519Keyring::Bob, Sr25519Keyring::Charlie],
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);
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})
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}
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}
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