Staking Miner (#3141)

Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>
Co-authored-by: Peter Goodspeed-Niklaus <peter.r.goodspeedniklaus@gmail.com>

polkadot/runtime/common/src/elections.rs

@@ -18,10 +18,14 @@
 
 use frame_support::{
 	parameter_types,
-	traits::Get,
-	weights::{DispatchClass, Weight, WeightToFeePolynomial},
+	weights::{DispatchClass, Weight},
 };
-use sp_runtime::Perbill;
+use sp_runtime::{
+	traits::{Zero, Dispatchable},
+	FixedU128, FixedPointNumber, Perbill,
+};
+use pallet_transaction_payment::OnChargeTransaction;
+use frame_support::weights::{DispatchInfo, Pays};
 use super::{BlockExecutionWeight, BlockLength, BlockWeights};
 
 parameter_types! {
@@ -44,18 +48,21 @@ parameter_types! {
 		.get(DispatchClass::Normal);
 }
 
-/// Compute the expected fee for submitting an election solution.
-///
-/// This is `multiplier` multiplied by the fee for the expected submission weight according to the
-/// weight info.
-///
-/// Assumes that the signed submission queue is full.
-pub fn fee_for_submit_call<T, WeightToFee, WeightInfo>(multiplier: Perbill) -> WeightToFee::Balance
+pub fn fee_for_submit_call<T>(
+	multiplier: FixedU128,
+	weight: Weight,
+	length: u32,
+) -> primitives::v1::Balance
 where
-	T: pallet_election_provider_multi_phase::Config,
-	WeightToFee: WeightToFeePolynomial,
-	WeightInfo: pallet_election_provider_multi_phase::WeightInfo,
+	T: pallet_transaction_payment::Config,
+	<T as pallet_transaction_payment::Config>::OnChargeTransaction:
+		OnChargeTransaction<T, Balance = primitives::v1::Balance>,
+	<T as frame_system::Config>::Call: Dispatchable<Info = DispatchInfo>,
 {
-	let expected_weight = WeightInfo::submit(T::SignedMaxSubmissions::get());
-	multiplier * WeightToFee::calc(&expected_weight)
+	let info = DispatchInfo { weight, class: DispatchClass::Normal, pays_fee: Pays::Yes };
+	multiplier.saturating_mul_int(pallet_transaction_payment::Pallet::<T>::compute_fee(
+		length,
+		&info,
+		Zero::zero(),
+	))
 }

polkadot/runtime/kusama/src/lib.rs

@@ -65,8 +65,8 @@ use xcm_builder::{
 use xcm_executor::XcmExecutor;
 use sp_arithmetic::Perquintill;
 use sp_runtime::{
-	create_runtime_str, generic, impl_opaque_keys,
-	ApplyExtrinsicResult, KeyTypeId, Percent, Permill, Perbill,
+	create_runtime_str, generic, impl_opaque_keys, ApplyExtrinsicResult, KeyTypeId, Percent,
+	Permill, Perbill, FixedPointNumber,
 	transaction_validity::{TransactionValidity, TransactionSource, TransactionPriority},
 	traits::{
 		BlakeTwo256, Block as BlockT, OpaqueKeys, ConvertInto, AccountIdLookup,
@@ -101,6 +101,7 @@ pub use pallet_staking::StakerStatus;
 pub use sp_runtime::BuildStorage;
 pub use pallet_timestamp::Call as TimestampCall;
 pub use pallet_balances::Call as BalancesCall;
+pub use pallet_election_provider_multi_phase::Call as EPMCall;
 
 /// Constant values used within the runtime.
 pub mod constants;
@@ -348,6 +349,7 @@ impl pallet_session::historical::Config for Runtime {
 	type FullIdentificationOf = pallet_staking::ExposureOf<Runtime>;
 }
 
+use pallet_election_provider_multi_phase::WeightInfo;
 parameter_types! {
 	// phase durations. 1/4 of the last session for each.
 	pub const SignedPhase: u32 = EPOCH_DURATION_IN_SLOTS / 4;
@@ -360,11 +362,14 @@ parameter_types! {
 	// 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));
+	pub SignedRewardBase: Balance = fee_for_submit_call::<Runtime>(
+		// give 20% threshold.
+		sp_runtime::FixedU128::saturating_from_rational(12, 10),
+		// maximum weight possible.
+		weights::pallet_election_provider_multi_phase::WeightInfo::<Runtime>::submit(SignedMaxSubmissions::get()),
+		// assume a solution of 100kb length.
+		100 * 1024
+	);
 
 	// fallback: emergency phase.
 	pub const Fallback: pallet_election_provider_multi_phase::FallbackStrategy =

polkadot/runtime/polkadot/src/lib.rs

@@ -41,7 +41,7 @@ use primitives::v1::{
 	ValidatorIndex, InboundDownwardMessage, InboundHrmpMessage, SessionInfo,
 };
 use sp_runtime::{
-	create_runtime_str, generic, impl_opaque_keys, ApplyExtrinsicResult,
+	create_runtime_str, generic, impl_opaque_keys, ApplyExtrinsicResult, FixedPointNumber,
 	KeyTypeId, Percent, Permill, Perbill, curve::PiecewiseLinear,
 	transaction_validity::{TransactionValidity, TransactionSource, TransactionPriority},
 	traits::{
@@ -77,6 +77,7 @@ pub use pallet_staking::StakerStatus;
 pub use sp_runtime::BuildStorage;
 pub use pallet_timestamp::Call as TimestampCall;
 pub use pallet_balances::Call as BalancesCall;
+pub use pallet_election_provider_multi_phase::Call as EPMCall;
 
 /// Constant values used within the runtime.
 pub mod constants;
@@ -328,6 +329,7 @@ impl pallet_session::historical::Config for Runtime {
 	type FullIdentificationOf = pallet_staking::ExposureOf<Runtime>;
 }
 
+use pallet_election_provider_multi_phase::WeightInfo;
 parameter_types! {
 	// phase durations. 1/4 of the last session for each.
 	pub const SignedPhase: u32 = EPOCH_DURATION_IN_SLOTS / 4;
@@ -340,11 +342,14 @@ parameter_types! {
 	// 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));
+	pub SignedRewardBase: Balance = fee_for_submit_call::<Runtime>(
+		// give 20% threshold.
+		sp_runtime::FixedU128::saturating_from_rational(12, 10),
+		// maximum weight possible.
+		weights::pallet_election_provider_multi_phase::WeightInfo::<Runtime>::submit(SignedMaxSubmissions::get()),
+		// assume a solution of 200kb length.
+		200 * 1024
+	);
 
 	// fallback: emergency phase.
 	pub const Fallback: pallet_election_provider_multi_phase::FallbackStrategy =

polkadot/runtime/westend/src/lib.rs

@@ -65,7 +65,7 @@ use xcm_builder::{
 };
 
 use sp_runtime::{
-	create_runtime_str, generic, impl_opaque_keys,
+	create_runtime_str, generic, impl_opaque_keys, FixedPointNumber,
 	ApplyExtrinsicResult, KeyTypeId, Perbill, curve::PiecewiseLinear,
 	transaction_validity::{TransactionValidity, TransactionSource, TransactionPriority},
 	traits::{
@@ -100,6 +100,7 @@ pub use pallet_staking::StakerStatus;
 pub use sp_runtime::BuildStorage;
 pub use pallet_timestamp::Call as TimestampCall;
 pub use pallet_balances::Call as BalancesCall;
+pub use pallet_election_provider_multi_phase::Call as EPMCall;
 
 /// Constant values used within the runtime.
 pub mod constants;
@@ -333,6 +334,7 @@ impl pallet_session::historical::Config for Runtime {
 	type FullIdentificationOf = pallet_staking::ExposureOf<Runtime>;
 }
 
+use pallet_election_provider_multi_phase::WeightInfo;
 parameter_types! {
 	// phase durations. 1/4 of the last session for each.
 	pub const SignedPhase: u32 = EPOCH_DURATION_IN_SLOTS / 4;
@@ -345,11 +347,14 @@ parameter_types! {
 	// 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));
+	pub SignedRewardBase: Balance = fee_for_submit_call::<Runtime>(
+		// give 20% threshold.
+		sp_runtime::FixedU128::saturating_from_rational(12, 10),
+		// maximum weight possible.
+		weights::pallet_election_provider_multi_phase::WeightInfo::<Runtime>::submit(SignedMaxSubmissions::get()),
+		// assume a solution of 100kb length.
+		100 * 1024
+	);
 
 	// fallback: emergency phase.
 	pub const Fallback: pallet_election_provider_multi_phase::FallbackStrategy =