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Create trait for NPoS election algorithms (#9664)

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* build the template, hand it over to zeke now.

* Tests working

* save wip

* Some updates

* Some cleanup

* mo cleanin

* Link to issue

* Apply suggestions from code review

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Bound accuracy for prepare_election_result

* Use npos_election::Error for phragmms

* save

* Apply suggestions from code review

* Simplify test to use Balancing::set

* Cargo.lock after build

* Revert "Cargo.lock after build"

This reverts commit 7d726c8efa687c09e4f377196b106eb9e9760487.

* Try reduce cargo.lock diff

* Update bin/node/runtime/src/lib.rs

* Comment

* Apply suggestions from code review

* Set balancing directly

* Document som pub items

* Update frame/election-provider-multi-phase/src/unsigned.rs

* Apply suggestions from code review

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Improve some comments

* Revert accidental change to random file

* tiney

* revert

Co-authored-by: kianenigma <kian@parity.io>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
This commit is contained in:
Zeke Mostov
2021-09-09 12:46:24 -07:00
committed by GitHub
parent d1c281461d
commit 6bfcfeed4c
10 changed files with 203 additions and 105 deletions
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substrate/bin/node/runtime/src/lib.rs
+31 -2
View File
@@ -534,7 +534,6 @@ parameter_types! {
// miner configs
pub const MultiPhaseUnsignedPriority: TransactionPriority = StakingUnsignedPriority::get() - 1u64;
pub const MinerMaxIterations: u32 = 10;
pub MinerMaxWeight: Weight = RuntimeBlockWeights::get()
.get(DispatchClass::Normal)
.max_extrinsic.expect("Normal extrinsics have a weight limit configured; qed")
@@ -570,6 +569,32 @@ impl pallet_election_provider_multi_phase::BenchmarkingConfig for BenchmarkConfi
const MAXIMUM_TARGETS: u32 = 2000;
}
/// Maximum number of iterations for balancing that will be executed in the embedded OCW
/// miner of election provider multi phase.
pub const MINER_MAX_ITERATIONS: u32 = 10;
/// A source of random balance for NposSolver, which is meant to be run by the OCW election miner.
pub struct OffchainRandomBalancing;
impl frame_support::pallet_prelude::Get<Option<(usize, sp_npos_elections::ExtendedBalance)>>
for OffchainRandomBalancing
{
fn get() -> Option<(usize, sp_npos_elections::ExtendedBalance)> {
use sp_runtime::traits::TrailingZeroInput;
let iters = match MINER_MAX_ITERATIONS {
0 => 0,
max @ _ => {
let seed = sp_io::offchain::random_seed();
let random = <u32>::decode(&mut TrailingZeroInput::new(&seed))
.expect("input is padded with zeroes; qed") %
max.saturating_add(1);
random as usize
},
};
Some((iters, 0))
}
}
impl pallet_election_provider_multi_phase::Config for Runtime {
type Event = Event;
type Currency = Balances;
@@ -578,7 +603,6 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
type UnsignedPhase = UnsignedPhase;
type SolutionImprovementThreshold = SolutionImprovementThreshold;
type OffchainRepeat = OffchainRepeat;
type MinerMaxIterations = MinerMaxIterations;
type MinerMaxWeight = MinerMaxWeight;
type MinerMaxLength = MinerMaxLength;
type MinerTxPriority = MultiPhaseUnsignedPriority;
@@ -594,6 +618,11 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
type OnChainAccuracy = Perbill;
type Solution = NposSolution16;
type Fallback = Fallback;
type Solver = frame_election_provider_support::SequentialPhragmen<
AccountId,
pallet_election_provider_multi_phase::SolutionAccuracyOf<Runtime>,
OffchainRandomBalancing,
>;
type WeightInfo = pallet_election_provider_multi_phase::weights::SubstrateWeight<Runtime>;
type ForceOrigin = EnsureRootOrHalfCouncil;
type BenchmarkingConfig = BenchmarkConfig;