Allow staking miner to use different election algorithms (#3752)

* WIP

* Dry run cmd working

* Monitor cmd works

* Configure balance with parameter type

* Comments

* cleannnn

* Add balancing to PhragMMS

* Move OffchainRanomBalancing to common

* DRY mine_unchecked over config.solver

* FMT

* Apply suggestions from code review

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

* Improve docs for any_runtime_unit!

* Some cleanup

* fmt

* Correct capitilaztion

* Improve version mismatch log

* Revert "Improve version mismatch log"

This reverts commit 57570403f654f1efa4307956cda2de6f0c64f70a.

* Apply suggestions from code review

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

* Remove Balancing struct and use Balancing Parameter type instead

* update Substrate

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

polkadot/runtime/common/Cargo.toml

@@ -22,6 +22,7 @@ sp-runtime = { git = "https://github.com/paritytech/substrate", branch = "master
 sp-session = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-staking = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-core = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
+sp-npos-elections = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 
 pallet-authorship = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-balances = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
@@ -90,6 +91,7 @@ std = [
 	"libsecp256k1/std",
 	"runtime-parachains/std",
 	"xcm/std",
+	"sp-npos-elections/std",
 ]
 runtime-benchmarks = [
 	"libsecp256k1/hmac",

polkadot/runtime/common/src/elections.rs

@@ -55,3 +55,30 @@ impl pallet_election_provider_multi_phase::BenchmarkingConfig for BenchmarkConfi
 	const MINER_MAXIMUM_VOTERS: u32 = 15_000;
 	const MAXIMUM_TARGETS: u32 = 2000;
 }
+
+/// Maximum number of iterations for balancing that will be executed in the embedded miner of
+/// pallet-election-provider-multi-phase.
+pub const MINER_MAX_ITERATIONS: u32 = 10;
+
+/// A source of random balance for the NPoS Solver, 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::{codec::Decode, 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))
+	}
+}

polkadot/runtime/kusama/src/lib.rs

@@ -356,7 +356,6 @@ parameter_types! {
 	pub SolutionImprovementThreshold: Perbill = Perbill::from_rational(5u32, 10_000);
 
 	// miner configs
-	pub const MinerMaxIterations: u32 = 10;
 	pub OffchainRepeat: BlockNumber = 5;
 }
 
@@ -384,7 +383,6 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
 	type RewardHandler = (); // nothing to do upon rewards
 	type SignedPhase = SignedPhase;
 	type SolutionImprovementThreshold = SolutionImprovementThreshold;
-	type MinerMaxIterations = MinerMaxIterations;
 	type MinerMaxWeight = OffchainSolutionWeightLimit; // For now use the one from staking.
 	type MinerMaxLength = OffchainSolutionLengthLimit;
 	type OffchainRepeat = OffchainRepeat;
@@ -393,6 +391,11 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
 	type Solution = NposCompactSolution24;
 	type OnChainAccuracy = Perbill;
 	type Fallback = Fallback;
+	type Solver = frame_election_provider_support::SequentialPhragmen<
+		AccountId,
+		pallet_election_provider_multi_phase::SolutionAccuracyOf<Runtime>,
+		runtime_common::elections::OffchainRandomBalancing,
+	>;
 	type BenchmarkingConfig = runtime_common::elections::BenchmarkConfig;
 	type ForceOrigin = EnsureOneOf<
 		AccountId,

polkadot/runtime/polkadot/src/lib.rs

@@ -362,7 +362,6 @@ parameter_types! {
 	pub SolutionImprovementThreshold: Perbill = Perbill::from_rational(5u32, 10_000);
 
 	// miner configs
-	pub const MinerMaxIterations: u32 = 10;
 	pub OffchainRepeat: BlockNumber = 5;
 }
 
@@ -390,7 +389,6 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
 	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.
 	type MinerMaxLength = OffchainSolutionLengthLimit;
 	type OffchainRepeat = OffchainRepeat;
@@ -399,6 +397,11 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
 	type OnChainAccuracy = Perbill;
 	type Solution = NposCompactSolution16;
 	type Fallback = Fallback;
+	type Solver = frame_election_provider_support::SequentialPhragmen<
+		AccountId,
+		pallet_election_provider_multi_phase::SolutionAccuracyOf<Runtime>,
+		runtime_common::elections::OffchainRandomBalancing,
+	>;
 	type BenchmarkingConfig = runtime_common::elections::BenchmarkConfig;
 	type ForceOrigin = EnsureOneOf<
 		AccountId,

polkadot/runtime/westend/src/lib.rs

@@ -342,7 +342,6 @@ parameter_types! {
 	pub SolutionImprovementThreshold: Perbill = Perbill::from_rational(5u32, 10_000);
 
 	// miner configs
-	pub const MinerMaxIterations: u32 = 10;
 	pub OffchainRepeat: BlockNumber = 5;
 }
 
@@ -370,7 +369,6 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
 	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.
 	type MinerMaxLength = OffchainSolutionLengthLimit;
 	type OffchainRepeat = OffchainRepeat;
@@ -379,6 +377,11 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
 	type OnChainAccuracy = Perbill;
 	type Solution = NposCompactSolution16;
 	type Fallback = Fallback;
+	type Solver = frame_election_provider_support::SequentialPhragmen<
+		AccountId,
+		pallet_election_provider_multi_phase::SolutionAccuracyOf<Runtime>,
+		runtime_common::elections::OffchainRandomBalancing,
+	>;
 	type BenchmarkingConfig = runtime_common::elections::BenchmarkConfig;
 	type ForceOrigin = EnsureRoot<AccountId>;
 	type WeightInfo = weights::pallet_election_provider_multi_phase::WeightInfo<Runtime>;

polkadot/utils/staking-miner/Cargo.toml

@@ -22,11 +22,13 @@ sp-core = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sp-version = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sp-io = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sp-runtime = { git = "https://github.com/paritytech/substrate", branch = "master" }
+sp-npos-elections = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sc-transaction-pool-api = { git = "https://github.com/paritytech/substrate", branch = "master" }
 
 
 frame-system = { git = "https://github.com/paritytech/substrate", branch = "master" }
 frame-support = { git = "https://github.com/paritytech/substrate", branch = "master" }
+frame-election-provider-support = { git = "https://github.com/paritytech/substrate", branch = "master" }
 pallet-election-provider-multi-phase = { git = "https://github.com/paritytech/substrate", branch = "master" }
 pallet-staking = { git = "https://github.com/paritytech/substrate", branch = "master" }
 pallet-balances = { git = "https://github.com/paritytech/substrate", branch = "master" }

polkadot/utils/staking-miner/src/dry_run.rs

@@ -23,7 +23,7 @@ use codec::Encode;
 use frame_support::traits::Currency;
 
 /// Forcefully create the snapshot. This can be used to compute the election at anytime.
-fn force_create_snapshot<T: EPM::Config>(ext: &mut Ext) -> Result<(), Error> {
+fn force_create_snapshot<T: EPM::Config>(ext: &mut Ext) -> Result<(), Error<T>> {
 	ext.execute_with(|| {
 		if <EPM::Snapshot<T>>::exists() {
 			log::info!(target: LOG_TARGET, "snapshot already exists.");
@@ -112,7 +112,7 @@ macro_rules! dry_run_cmd_for { ($runtime:ident) => { paste::paste! {
 		shared: SharedConfig,
 		config: DryRunConfig,
 		signer: Signer,
-	) -> Result<(), Error> {
+	) -> Result<(), Error<$crate::[<$runtime _runtime_exports>]::Runtime>> {
 		use $crate::[<$runtime _runtime_exports>]::*;
 		let mut ext = crate::create_election_ext::<Runtime, Block>(
 			shared.uri.clone(),
@@ -121,7 +121,8 @@ macro_rules! dry_run_cmd_for { ($runtime:ident) => { paste::paste! {
 		).await?;
 		force_create_snapshot::<Runtime>(&mut ext)?;
 
-		let (raw_solution, witness) = crate::mine_unchecked::<Runtime>(&mut ext, config.iterations, false)?;
+		let (raw_solution, witness) = crate::mine_with::<Runtime>(&config.solver, &mut ext)?;
+
 		let nonce = crate::get_account_info::<Runtime>(client, &signer.account, config.at)
 			.await?
 			.map(|i| i.nonce)
@@ -148,7 +149,9 @@ macro_rules! dry_run_cmd_for { ($runtime:ident) => { paste::paste! {
 		});
 		log::info!(target: LOG_TARGET, "dispatch result is {:?}", dispatch_result);
 
-		let outcome = rpc_decode::<sp_runtime::ApplyExtrinsicResult>(client, "system_dryRun", params!{ bytes }).await?;
+		let outcome = rpc_decode::<sp_runtime::ApplyExtrinsicResult>(client, "system_dryRun", params!{ bytes })
+			.await
+			.map_err::<Error<Runtime>, _>(Into::into)?;
 		log::info!(target: LOG_TARGET, "dry-run outcome is {:?}", outcome);
 		Ok(())
 	}

polkadot/utils/staking-miner/src/emergency_solution.rs

@@ -18,20 +18,22 @@
 
 use crate::{prelude::*, Error, SharedConfig};
 use codec::Encode;
+use frame_election_provider_support::SequentialPhragmen;
 use std::io::Write;
 
 macro_rules! emergency_solution_cmd_for { ($runtime:ident) => { paste::paste! {
 	/// Execute the emergency-solution command.
 	pub(crate) async fn [<emergency_solution_cmd_ $runtime>](
 		shared: SharedConfig,
-	) -> Result<(), Error> {
+	) -> Result<(), Error<$crate::[<$runtime _runtime_exports>]::Runtime>> {
 		use $crate::[<$runtime _runtime_exports>]::*;
 		let mut ext = crate::create_election_ext::<Runtime, Block>(shared.uri.clone(), None, vec![]).await?;
 		ext.execute_with(|| {
 			assert!(EPM::Pallet::<Runtime>::current_phase().is_emergency());
 			// NOTE: this internally calls feasibility_check, but we just re-do it here as an easy way
 			// to get a `ReadySolution`.
-			let (raw_solution, _) = <EPM::Pallet<Runtime>>::mine_solution(50)?;
+			let (raw_solution, _) =
+				<EPM::Pallet<Runtime>>::mine_solution::<SequentialPhragmen<AccountId, sp_runtime::Perbill>>()?;
 			log::info!(target: LOG_TARGET, "mined solution with {:?}", &raw_solution.score);
 			let ready_solution = EPM::Pallet::<Runtime>::feasibility_check(raw_solution, EPM::ElectionCompute::Signed)?;
 			let encoded_ready = ready_solution.encode();

polkadot/utils/staking-miner/src/main.rs

@@ -38,9 +38,11 @@ mod signer;
 pub(crate) use prelude::*;
 pub(crate) use signer::get_account_info;
 
+use frame_election_provider_support::NposSolver;
 use frame_support::traits::Get;
 use jsonrpsee_ws_client::{WsClient, WsClientBuilder};
 use remote_externalities::{Builder, Mode, OnlineConfig};
+use sp_npos_elections::ExtendedBalance;
 use sp_runtime::traits::Block as BlockT;
 use structopt::StructOpt;
 
@@ -193,15 +195,43 @@ macro_rules! any_runtime {
 	}
 }
 
-#[derive(Debug, thiserror::Error)]
+/// Same as [`any_runtime`], but instead of returning a `Result`, this simply returns `()`. Useful
-enum Error {
+/// for situations where the result is not useful and un-ergonomic to handle.
+#[macro_export]
+macro_rules! any_runtime_unit {
+	($($code:tt)*) => {
+		unsafe {
+			match $crate::RUNTIME {
+				$crate::AnyRuntime::Polkadot => {
+					#[allow(unused)]
+					use $crate::polkadot_runtime_exports::*;
+					let _ = $($code)*;
+				},
+				$crate::AnyRuntime::Kusama => {
+					#[allow(unused)]
+					use $crate::kusama_runtime_exports::*;
+					let _ = $($code)*;
+				},
+				$crate::AnyRuntime::Westend => {
+					#[allow(unused)]
+					use $crate::westend_runtime_exports::*;
+					let _ = $($code)*;
+				}
+			}
+		}
+	}
+}
+
+#[derive(frame_support::DebugNoBound, thiserror::Error)]
+enum Error<T: EPM::Config> {
 	Io(#[from] std::io::Error),
-	Jsonrpsee(#[from] jsonrpsee_ws_client::types::Error),
+	JsonRpsee(#[from] jsonrpsee_ws_client::types::Error),
+	RpcHelperError(#[from] rpc_helpers::RpcHelperError),
 	Codec(#[from] codec::Error),
 	Crypto(sp_core::crypto::SecretStringError),
 	RemoteExternalities(&'static str),
-	PalletMiner(EPM::unsigned::MinerError),
+	PalletMiner(EPM::unsigned::MinerError<T>),
-	PalletElection(EPM::ElectionError),
+	PalletElection(EPM::ElectionError<T>),
 	PalletFeasibility(EPM::FeasibilityError),
 	AccountDoesNotExists,
 	IncorrectPhase,
@@ -209,33 +239,33 @@ enum Error {
 	VersionMismatch,
 }
 
-impl From<sp_core::crypto::SecretStringError> for Error {
+impl<T: EPM::Config> From<sp_core::crypto::SecretStringError> for Error<T> {
-	fn from(e: sp_core::crypto::SecretStringError) -> Error {
+	fn from(e: sp_core::crypto::SecretStringError) -> Error<T> {
 		Error::Crypto(e)
 	}
 }
 
-impl From<EPM::unsigned::MinerError> for Error {
+impl<T: EPM::Config> From<EPM::unsigned::MinerError<T>> for Error<T> {
-	fn from(e: EPM::unsigned::MinerError) -> Error {
+	fn from(e: EPM::unsigned::MinerError<T>) -> Error<T> {
 		Error::PalletMiner(e)
 	}
 }
 
-impl From<EPM::ElectionError> for Error {
+impl<T: EPM::Config> From<EPM::ElectionError<T>> for Error<T> {
-	fn from(e: EPM::ElectionError) -> Error {
+	fn from(e: EPM::ElectionError<T>) -> Error<T> {
 		Error::PalletElection(e)
 	}
 }
 
-impl From<EPM::FeasibilityError> for Error {
+impl<T: EPM::Config> From<EPM::FeasibilityError> for Error<T> {
-	fn from(e: EPM::FeasibilityError) -> Error {
+	fn from(e: EPM::FeasibilityError) -> Error<T> {
 		Error::PalletFeasibility(e)
 	}
 }
 
-impl std::fmt::Display for Error {
+impl<T: EPM::Config> std::fmt::Display for Error<T> {
 	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-		<Error as std::fmt::Debug>::fmt(self, f)
+		<Error<T> as std::fmt::Debug>::fmt(self, f)
 	}
 }
 
@@ -249,6 +279,58 @@ enum Command {
 	EmergencySolution,
 }
 
+#[derive(Debug, Clone, StructOpt)]
+enum Solvers {
+	SeqPhragmen {
+		#[structopt(long, default_value = "10")]
+		iterations: usize,
+	},
+	PhragMMS {
+		#[structopt(long, default_value = "10")]
+		iterations: usize,
+	},
+}
+
+/// Mine a solution with the given `solver`.
+fn mine_with<T>(
+	solver: &Solvers,
+	ext: &mut Ext,
+) -> Result<(EPM::RawSolution<EPM::SolutionOf<T>>, u32), Error<T>>
+where
+	T: EPM::Config,
+	T::Solver: NposSolver<Error = sp_npos_elections::Error>,
+{
+	use frame_election_provider_support::{PhragMMS, SequentialPhragmen};
+
+	match solver {
+		Solvers::SeqPhragmen { iterations } => {
+			BalanceIterations::set(*iterations);
+			mine_unchecked::<
+				T,
+				SequentialPhragmen<
+					<T as frame_system::Config>::AccountId,
+					sp_runtime::Perbill,
+					Balancing,
+				>,
+			>(ext, false)
+		},
+		Solvers::PhragMMS { iterations } => {
+			BalanceIterations::set(*iterations);
+			mine_unchecked::<
+				T,
+				PhragMMS<<T as frame_system::Config>::AccountId, sp_runtime::Perbill, Balancing>,
+			>(ext, false)
+		},
+	}
+}
+
+frame_support::parameter_types! {
+	/// Number of balancing iterations for a solution algorithm. Set based on the [`Solvers`] CLI
+	/// config.
+	pub static BalanceIterations: usize = 10;
+	pub static Balancing: Option<(usize, ExtendedBalance)> = Some((BalanceIterations::get(), 0));
+}
+
 #[derive(Debug, Clone, StructOpt)]
 struct MonitorConfig {
 	/// They type of event to listen to.
@@ -259,8 +341,8 @@ struct MonitorConfig {
 	#[structopt(long, default_value = "head", possible_values = &["head", "finalized"])]
 	listen: String,
 
-	#[structopt(long, short, default_value = "10")]
+	#[structopt(subcommand)]
-	iterations: usize,
+	solver: Solvers,
 }
 
 #[derive(Debug, Clone, StructOpt)]
@@ -269,8 +351,8 @@ struct DryRunConfig {
 	#[structopt(long)]
 	at: Option<Hash>,
 
-	#[structopt(long, short, default_value = "10")]
+	#[structopt(subcommand)]
-	iterations: usize,
+	solver: Solvers,
 }
 
 #[derive(Debug, Clone, StructOpt)]
@@ -303,7 +385,7 @@ async fn create_election_ext<T: EPM::Config, B: BlockT>(
 	uri: String,
 	at: Option<B::Hash>,
 	additional: Vec<String>,
-) -> Result<Ext, Error> {
+) -> Result<Ext, Error<T>> {
 	use frame_support::{storage::generator::StorageMap, traits::PalletInfo};
 	use sp_core::hashing::twox_128;
 
@@ -327,13 +409,20 @@ async fn create_election_ext<T: EPM::Config, B: BlockT>(
 
 /// Compute the election at the given block number. It expects to NOT be `Phase::Off`. In other
 /// words, the snapshot must exists on the given externalities.
-fn mine_unchecked<T: EPM::Config>(
+fn mine_unchecked<T, S>(
 	ext: &mut Ext,
-	iterations: usize,
 	do_feasibility: bool,
-) -> Result<(EPM::RawSolution<EPM::SolutionOf<T>>, u32), Error> {
+) -> Result<(EPM::RawSolution<EPM::SolutionOf<T>>, u32), Error<T>>
+where
+	T: EPM::Config,
+	S: NposSolver<
+		Error = <<T as EPM::Config>::Solver as NposSolver>::Error,
+		AccountId = <<T as EPM::Config>::Solver as NposSolver>::AccountId,
+	>,
+{
 	ext.execute_with(|| {
-		let (solution, _) = <EPM::Pallet<T>>::mine_solution(iterations)?;
+		let (solution, _) =
+			<EPM::Pallet<T>>::mine_solution::<S>().map_err::<Error<T>, _>(Into::into)?;
 		if do_feasibility {
 			let _ = <EPM::Pallet<T>>::feasibility_check(
 				solution.clone(),
@@ -346,7 +435,7 @@ fn mine_unchecked<T: EPM::Config>(
 }
 
 #[allow(unused)]
-fn mine_dpos<T: EPM::Config>(ext: &mut Ext) -> Result<(), Error> {
+fn mine_dpos<T: EPM::Config>(ext: &mut Ext) -> Result<(), Error<T>> {
 	ext.execute_with(|| {
 		use std::collections::BTreeMap;
 		use EPM::RoundSnapshot;
@@ -383,10 +472,10 @@ fn mine_dpos<T: EPM::Config>(ext: &mut Ext) -> Result<(), Error> {
 	})
 }
 
-pub(crate) async fn check_versions<T: frame_system::Config>(
+pub(crate) async fn check_versions<T: frame_system::Config + EPM::Config>(
 	client: &WsClient,
 	print: bool,
-) -> Result<(), Error> {
+) -> Result<(), Error<T>> {
 	let linked_version = T::Version::get();
 	let on_chain_version = rpc_helpers::rpc::<sp_version::RuntimeVersion>(
 		client,
@@ -486,7 +575,7 @@ async fn main() {
 	}
 	log::info!(target: LOG_TARGET, "connected to chain {:?}", chain);
 
-	let _ = any_runtime! {
+	any_runtime_unit! {
 		check_versions::<Runtime>(&client, true).await
 	};
 
@@ -498,9 +587,18 @@ async fn main() {
 
 	let outcome = any_runtime! {
 		match command.clone() {
-			Command::Monitor(c) => monitor_cmd(&client, shared, c, signer_account).await,
+			Command::Monitor(c) => monitor_cmd(&client, shared, c, signer_account).await
-			Command::DryRun(c) => dry_run_cmd(&client, shared, c, signer_account).await,
+				.map_err(|e| {
-			Command::EmergencySolution => emergency_solution_cmd(shared.clone()).await,
+					log::error!(target: LOG_TARGET, "Monitor error: {:?}", e);
+				}),
+			Command::DryRun(c) => dry_run_cmd(&client, shared, c, signer_account).await
+				.map_err(|e| {
+					log::error!(target: LOG_TARGET, "DryRun error: {:?}", e);
+				}),
+			Command::EmergencySolution => emergency_solution_cmd(shared.clone()).await
+				.map_err(|e| {
+					log::error!(target: LOG_TARGET, "EmergencySolution error: {:?}", e);
+				}),
 		}
 	};
 	log::info!(target: LOG_TARGET, "round of execution finished. outcome = {:?}", outcome);

polkadot/utils/staking-miner/src/monitor.rs

@@ -30,10 +30,11 @@ use sc_transaction_pool_api::TransactionStatus;
 async fn ensure_signed_phase<T: EPM::Config, B: BlockT>(
 	client: &WsClient,
 	at: B::Hash,
-) -> Result<(), Error> {
+) -> Result<(), Error<T>> {
 	let key = sp_core::storage::StorageKey(EPM::CurrentPhase::<T>::hashed_key().to_vec());
 	let phase = get_storage::<EPM::Phase<BlockNumber>>(client, params! {key, at})
-		.await?
+		.await
+		.map_err::<Error<T>, _>(Into::into)?
 		.unwrap_or_default();
 
 	if phase.is_signed() {
@@ -50,7 +51,7 @@ async fn ensure_no_previous_solution<
 >(
 	ext: &mut Ext,
 	us: &AccountId,
-) -> Result<(), Error> {
+) -> Result<(), Error<T>> {
 	use EPM::signed::SignedSubmissions;
 	ext.execute_with(|| {
 		if <SignedSubmissions<T>>::get().iter().any(|ss| &ss.who == us) {
@@ -68,7 +69,7 @@ macro_rules! monitor_cmd_for { ($runtime:tt) => { paste::paste! {
 		shared: SharedConfig,
 		config: MonitorConfig,
 		signer: Signer,
-	) -> Result<(), Error> {
+	) -> Result<(), Error<$crate::[<$runtime _runtime_exports>]::Runtime>> {
 		use $crate::[<$runtime _runtime_exports>]::*;
 		let (sub, unsub) = if config.listen == "head" {
 			("chain_subscribeNewHeads", "chain_unsubscribeNewHeads")
@@ -109,7 +110,8 @@ macro_rules! monitor_cmd_for { ($runtime:tt) => { paste::paste! {
 				continue;
 			}
 
-			let (raw_solution, witness) = crate::mine_unchecked::<Runtime>(&mut ext, config.iterations, true)?;
+			let (raw_solution, witness) = crate::mine_with::<Runtime>(&config.solver, &mut ext)?;
+
 			log::info!(target: LOG_TARGET, "mined solution with {:?}", &raw_solution.score);
 
 			let nonce = crate::get_account_info::<Runtime>(client, &signer.account, Some(hash))
@@ -149,8 +151,7 @@ macro_rules! monitor_cmd_for { ($runtime:tt) => { paste::paste! {
 					TransactionStatus::InBlock(hash) => {
 						log::info!(target: LOG_TARGET, "included at {:?}", hash);
 						let key = frame_support::storage::storage_prefix(b"System", b"Events");
-						let events =get_storage::<
+						let events = get_storage::<Vec<frame_system::EventRecord<Event, <Block as BlockT>::Hash>>,
-							Vec<frame_system::EventRecord<Event, <Block as BlockT>::Hash>>
 						>(client, params!{ key, hash }).await?.unwrap_or_default();
 						log::info!(target: LOG_TARGET, "events at inclusion {:?}", events);
 					}

polkadot/utils/staking-miner/src/rpc_helpers.rs

@@ -20,6 +20,18 @@ use super::*;
 use jsonrpsee_ws_client::types::traits::Client;
 pub(crate) use jsonrpsee_ws_client::types::v2::params::JsonRpcParams;
 
+#[derive(frame_support::DebugNoBound, thiserror::Error)]
+pub(crate) enum RpcHelperError {
+	JsonRpsee(#[from] jsonrpsee_ws_client::types::Error),
+	Codec(#[from] codec::Error),
+}
+
+impl std::fmt::Display for RpcHelperError {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		<RpcHelperError as std::fmt::Debug>::fmt(self, f)
+	}
+}
+
 #[macro_export]
 macro_rules! params {
 	($($param:expr),*) => {
@@ -41,8 +53,11 @@ pub(crate) async fn rpc<'a, Ret: serde::de::DeserializeOwned>(
 	client: &WsClient,
 	method: &'a str,
 	params: JsonRpcParams<'a>,
-) -> Result<Ret, Error> {
+) -> Result<Ret, RpcHelperError> {
-	client.request::<Ret>(method, params).await.map_err(Into::into)
+	client
+		.request::<Ret>(method, params)
+		.await
+		.map_err::<RpcHelperError, _>(Into::into)
 }
 
 /// Make the rpc request, decode the outcome into `Dec`. Don't use for storage, it will fail for
@@ -51,57 +66,26 @@ pub(crate) async fn rpc_decode<'a, Dec: codec::Decode>(
 	client: &WsClient,
 	method: &'a str,
 	params: JsonRpcParams<'a>,
-) -> Result<Dec, Error> {
+) -> Result<Dec, RpcHelperError> {
-	let bytes = rpc::<sp_core::Bytes>(client, method, params).await?;
+	let bytes = rpc::<sp_core::Bytes>(client, method, params)
-	<Dec as codec::Decode>::decode(&mut &*bytes.0).map_err(Into::into)
+		.await
+		.map_err::<RpcHelperError, _>(Into::into)?;
+	<Dec as codec::Decode>::decode(&mut &*bytes.0).map_err::<RpcHelperError, _>(Into::into)
 }
 
 /// Get the storage item.
 pub(crate) async fn get_storage<'a, T: codec::Decode>(
 	client: &WsClient,
 	params: JsonRpcParams<'a>,
-) -> Result<Option<T>, Error> {
+) -> Result<Option<T>, RpcHelperError> {
-	let maybe_bytes = rpc::<Option<sp_core::Bytes>>(client, "state_getStorage", params).await?;
+	let maybe_bytes = rpc::<Option<sp_core::Bytes>>(client, "state_getStorage", params)
+		.await
+		.map_err::<RpcHelperError, _>(Into::into)?;
 	if let Some(bytes) = maybe_bytes {
-		let decoded = <T as codec::Decode>::decode(&mut &*bytes.0)?;
+		let decoded = <T as codec::Decode>::decode(&mut &*bytes.0)
+			.map_err::<RpcHelperError, _>(Into::into)?;
 		Ok(Some(decoded))
 	} else {
 		Ok(None)
 	}
 }
-
-use codec::{EncodeLike, FullCodec};
-use frame_support::storage::{StorageMap, StorageValue};
-#[allow(unused)]
-pub(crate) async fn get_storage_value_frame_v2<'a, V: StorageValue<T>, T: FullCodec, Hash>(
-	client: &WsClient,
-	maybe_at: Option<Hash>,
-) -> Result<Option<V::Query>, Error>
-where
-	V::Query: codec::Decode,
-	Hash: serde::Serialize,
-{
-	let key = <V as StorageValue<T>>::hashed_key();
-	get_storage::<V::Query>(client, params! { key, maybe_at }).await
-}
-
-#[allow(unused)]
-pub(crate) async fn get_storage_map_frame_v2<
-	'a,
-	Hash,
-	KeyArg: EncodeLike<K>,
-	K: FullCodec,
-	T: FullCodec,
-	M: StorageMap<K, T>,
->(
-	client: &WsClient,
-	key: KeyArg,
-	maybe_at: Option<Hash>,
-) -> Result<Option<M::Query>, Error>
-where
-	M::Query: codec::Decode,
-	Hash: serde::Serialize,
-{
-	let key = <M as StorageMap<K, T>>::hashed_key_for(key);
-	get_storage::<M::Query>(client, params! { key, maybe_at }).await
-}

polkadot/utils/staking-miner/src/signer.rs

@@ -34,11 +34,11 @@ pub(crate) struct Signer {
 	pub(crate) pair: Pair,
 }
 
-pub(crate) async fn get_account_info<T: frame_system::Config>(
+pub(crate) async fn get_account_info<T: frame_system::Config + EPM::Config>(
 	client: &WsClient,
 	who: &T::AccountId,
 	maybe_at: Option<T::Hash>,
-) -> Result<Option<frame_system::AccountInfo<Index, T::AccountData>>, Error> {
+) -> Result<Option<frame_system::AccountInfo<Index, T::AccountData>>, Error<T>> {
 	rpc_helpers::get_storage::<frame_system::AccountInfo<Index, T::AccountData>>(
 		client,
 		crate::params! {
@@ -47,26 +47,27 @@ pub(crate) async fn get_account_info<T: frame_system::Config>(
 		},
 	)
 	.await
+	.map_err(Into::into)
 }
 
 /// Read the signer account's URI
 pub(crate) async fn signer_uri_from_string<
 	T: frame_system::Config<
-		AccountId = AccountId,
+			AccountId = AccountId,
-		Index = Index,
+			Index = Index,
-		AccountData = pallet_balances::AccountData<Balance>,
+			AccountData = pallet_balances::AccountData<Balance>,
-	>,
+		> + EPM::Config,
 >(
 	seed: &str,
 	client: &WsClient,
-) -> Result<Signer, Error> {
+) -> Result<Signer, Error<T>> {
 	let seed = seed.trim();
 
 	let pair = Pair::from_string(seed, None)?;
 	let account = T::AccountId::from(pair.public());
 	let _info = get_account_info::<T>(client, &account, None)
 		.await?
-		.ok_or(Error::AccountDoesNotExists)?;
+		.ok_or(Error::<T>::AccountDoesNotExists)?;
 	log::info!(
 		target: LOG_TARGET,
 		"loaded account {:?}, free: {:?}, info: {:?}",