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Companion for Decouple Staking and Election - Part 3: Signed Phase (#2793)

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* Companion for Decouple Staking and Election - Part 3: Signed Phase

https://github.com/paritytech/substrate/pull/7910

* remove some config types

* allow up to 5 signed submissions on polkadot and kusama

* signed phase is equal induration to unsigned phase

* use chain defaults for base and per-byte deposits; >= 16 SignedMaxSubmissions

* use a small but non-trivial solution reward

* reduce signed deposit per byte fee

* reduce signed reward, adjust polkadot expected soln size

* copy submit benchmark from substrate

* demo calculating an appropriate fee for the signed reward

Unfortunately, this doesn't work: it needs to be a constant function,
and AFAIK there's no way to make a trait method constant.

* SignedRewardBase is 1.5x the fee to submit a signed solution

* all chains use deposit byte of base per 50k

* update Substrate

* cargo update -p pallet-election-provider-multi-phase

Co-authored-by: parity-processbot <>
This commit is contained in:
Peter Goodspeed-Niklaus
2021-06-28 14:36:20 +02:00
committed by GitHub
parent e8d7e9f0dc
commit 95736d1bf1
10 changed files with 349 additions and 187 deletions
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polkadot/runtime/westend/src/lib.rs
+25 -3
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@@ -36,6 +36,7 @@ use runtime_common::{
impls::ToAuthor,
BlockHashCount, BlockWeights, BlockLength, RocksDbWeight,
OffchainSolutionWeightLimit, OffchainSolutionLengthLimit,
elections::fee_for_submit_call,
};
use runtime_parachains::origin as parachains_origin;
@@ -333,11 +334,24 @@ impl pallet_session::historical::Config for Runtime {
}
parameter_types! {
// no signed phase for now, just unsigned.
pub const SignedPhase: u32 = 0;
// phase durations. 1/4 of the last session for each.
pub const SignedPhase: u32 = EPOCH_DURATION_IN_SLOTS / 4;
pub const UnsignedPhase: u32 = EPOCH_DURATION_IN_SLOTS / 4;
// fallback: run election on-chain.
// signed config
pub const SignedMaxSubmissions: u32 = 128;
pub const SignedDepositBase: Balance = deposit(1, 0);
// A typical solution occupies within an order of magnitude of 50kb.
// This formula is currently adjusted such that a typical solution will spend an amount equal
// to the base deposit for every 50 kb.
pub const SignedDepositByte: Balance = deposit(1, 0) / (50 * 1024);
pub SignedRewardBase: Balance = fee_for_submit_call::<
Runtime,
crate::constants::fee::WeightToFee,
crate::weights::pallet_election_provider_multi_phase::WeightInfo<Runtime>,
>(Perbill::from_perthousand(1500));
// fallback: emergency phase.
pub const Fallback: pallet_election_provider_multi_phase::FallbackStrategy =
pallet_election_provider_multi_phase::FallbackStrategy::Nothing;
@@ -362,6 +376,14 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
type Currency = Balances;
type SignedPhase = SignedPhase;
type UnsignedPhase = UnsignedPhase;
type SignedMaxSubmissions = SignedMaxSubmissions;
type SignedRewardBase = SignedRewardBase;
type SignedDepositBase = SignedDepositBase;
type SignedDepositByte = SignedDepositByte;
type SignedDepositWeight = ();
type SignedMaxWeight = Self::MinerMaxWeight;
type SlashHandler = (); // burn slashes
type RewardHandler = (); // nothing to do upon rewards
type SolutionImprovementThreshold = SolutionImprovementThreshold;
type MinerMaxIterations = MinerMaxIterations;
type MinerMaxWeight = OffchainSolutionWeightLimit; // For now use the one from staking.