Companion for substrate/pull/8368 (#2683)

* Companion for https://github.com/paritytech/substrate/pull/8368

* "Update Substrate"

Co-authored-by: parity-processbot <>

polkadot/runtime/kusama/Cargo.toml

@@ -29,6 +29,7 @@ sp-session = { git = "https://github.com/paritytech/substrate", branch = "master
 sp-version = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 tx-pool-api = { package = "sp-transaction-pool", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 block-builder-api = { package = "sp-block-builder", 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-authority-discovery = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-authorship = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
@@ -152,6 +153,7 @@ std = [
 	"sp-session/std",
 	"runtime-common/std",
 	"frame-try-runtime/std",
+	"sp-npos-elections/std",
 ]
 runtime-benchmarks = [
 	"runtime-common/runtime-benchmarks",

polkadot/runtime/kusama/src/lib.rs

@@ -319,6 +319,12 @@ parameter_types! {
 	pub const MinerMaxIterations: u32 = 10;
 }
 
+sp_npos_elections::generate_solution_type!(
+	#[compact]
+	pub struct NposCompactSolution16::<u32, u16, sp_runtime::PerU16>(16)
+	// -------------------- ^^ <NominatorIndex, ValidatorIndex, Accuracy>
+);
+
 impl pallet_election_provider_multi_phase::Config for Runtime {
 	type Event = Event;
 	type Currency = Balances;
@@ -330,7 +336,7 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
 	type MinerTxPriority = NposSolutionPriority;
 	type DataProvider = Staking;
 	type OnChainAccuracy = Perbill;
-	type CompactSolution = pallet_staking::CompactAssignments;
+	type CompactSolution = NposCompactSolution16;
 	type Fallback = Fallback;
 	type BenchmarkingConfig = ();
 	type WeightInfo = weights::pallet_election_provider_multi_phase::WeightInfo<Runtime>;
@@ -370,6 +376,7 @@ type SlashCancelOrigin = EnsureOneOf<
 >;
 
 impl pallet_staking::Config for Runtime {
+	const MAX_NOMINATIONS: u32 = <NposCompactSolution16 as sp_npos_elections::CompactSolution>::LIMIT as u32;
 	type Currency = Balances;
 	type UnixTime = Timestamp;
 	type CurrencyToVote = CurrencyToVote;

polkadot/runtime/polkadot/Cargo.toml

@@ -17,9 +17,11 @@ smallvec = "1.6.1"
 
 authority-discovery-primitives = { package = "sp-authority-discovery", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 babe-primitives = { package = "sp-consensus-babe", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
-sp-api = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
+block-builder-api = { package = "sp-block-builder", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 inherents = { package = "sp-inherents", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 offchain-primitives = { package = "sp-offchain", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
+tx-pool-api = { package = "sp-transaction-pool", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
+sp-api = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-std = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-io = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-runtime = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
@@ -27,8 +29,7 @@ sp-staking = { git = "https://github.com/paritytech/substrate", branch = "master
 sp-core = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-session = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-version = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
-tx-pool-api = { package = "sp-transaction-pool", 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 }
-block-builder-api = { package = "sp-block-builder", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 
 pallet-authority-discovery = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-authorship = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
@@ -148,6 +149,7 @@ std = [
 	"sp-session/std",
 	"runtime-common/std",
 	"frame-try-runtime/std",
+	"sp-npos-elections/std",
 ]
 runtime-benchmarks = [
 	"runtime-common/runtime-benchmarks",

polkadot/runtime/polkadot/src/lib.rs

@@ -329,6 +329,12 @@ parameter_types! {
 	pub const MinerMaxIterations: u32 = 10;
 }
 
+sp_npos_elections::generate_solution_type!(
+	#[compact]
+	pub struct NposCompactSolution16::<u32, u16, sp_runtime::PerU16>(16)
+	// -------------------- ^^ <NominatorIndex, ValidatorIndex, Accuracy>
+);
+
 impl pallet_election_provider_multi_phase::Config for Runtime {
 	type Event = Event;
 	type Currency = Balances;
@@ -340,7 +346,7 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
 	type MinerTxPriority = NposSolutionPriority;
 	type DataProvider = Staking;
 	type OnChainAccuracy = Perbill;
-	type CompactSolution = pallet_staking::CompactAssignments;
+	type CompactSolution = NposCompactSolution16;
 	type Fallback = Fallback;
 	type BenchmarkingConfig = ();
 	type WeightInfo = weights::pallet_election_provider_multi_phase::WeightInfo<Runtime>;
@@ -379,6 +385,7 @@ type SlashCancelOrigin = EnsureOneOf<
 >;
 
 impl pallet_staking::Config for Runtime {
+	const MAX_NOMINATIONS: u32 = <NposCompactSolution16 as sp_npos_elections::CompactSolution>::LIMIT as u32;
 	type Currency = Balances;
 	type UnixTime = Timestamp;
 	type CurrencyToVote = CurrencyToVote;

polkadot/runtime/test-runtime/src/lib.rs

@@ -315,6 +315,7 @@ impl frame_election_provider_support::onchain::Config for Runtime {
 }
 
 impl pallet_staking::Config for Runtime {
+	const MAX_NOMINATIONS: u32 = 16;
 	type Currency = Balances;
 	type UnixTime = Timestamp;
 	type CurrencyToVote = frame_support::traits::U128CurrencyToVote;

polkadot/runtime/westend/Cargo.toml

@@ -29,6 +29,7 @@ sp-session = { git = "https://github.com/paritytech/substrate", branch = "master
 sp-version = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 tx-pool-api = { package = "sp-transaction-pool", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 block-builder-api = { package = "sp-block-builder", 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-authority-discovery = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-authorship = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
@@ -152,6 +153,7 @@ std = [
 	"sp-session/std",
 	"runtime-common/std",
 	"frame-try-runtime/std",
+	"sp-npos-elections/std",
 ]
 runtime-benchmarks = [
 	"runtime-common/runtime-benchmarks",

polkadot/runtime/westend/src/lib.rs

@@ -311,6 +311,12 @@ parameter_types! {
 	pub const MinerMaxIterations: u32 = 10;
 }
 
+sp_npos_elections::generate_solution_type!(
+	#[compact]
+	pub struct NposCompactSolution16::<u32, u16, sp_runtime::PerU16>(16)
+	// -------------------- ^^ <NominatorIndex, ValidatorIndex, Accuracy>
+);
+
 impl pallet_election_provider_multi_phase::Config for Runtime {
 	type Event = Event;
 	type Currency = Balances;
@@ -322,7 +328,7 @@ impl pallet_election_provider_multi_phase::Config for Runtime {
 	type MinerTxPriority = NposSolutionPriority;
 	type DataProvider = Staking;
 	type OnChainAccuracy = Perbill;
-	type CompactSolution = pallet_staking::CompactAssignments;
+	type CompactSolution = NposCompactSolution16;
 	type Fallback = Fallback;
 	type BenchmarkingConfig = ();
 	type WeightInfo = weights::pallet_election_provider_multi_phase::WeightInfo<Runtime>;
@@ -351,6 +357,7 @@ parameter_types! {
 }
 
 impl pallet_staking::Config for Runtime {
+	const MAX_NOMINATIONS: u32 = <NposCompactSolution16 as sp_npos_elections::CompactSolution>::LIMIT as u32;
 	type Currency = Balances;
 	type UnixTime = Timestamp;
 	type CurrencyToVote = CurrencyToVote;