[stable2512] Backport #10502

cumulus/parachains/runtimes/assets/asset-hub-westend/src/staking.rs

@@ -264,6 +264,8 @@ parameter_types! {
 	pub const RelaySessionDuration: BlockNumber = 1 * HOURS;
 	// 2 eras for unbonding (12 hours).
 	pub const BondingDuration: sp_staking::EraIndex = 2;
+	// Nominators can unbond faster when not slashable (2 eras = 12 hours).
+	pub const NominatorFastUnbondDuration: sp_staking::EraIndex = 2;
 	// 1 era in which slashes can be cancelled (6 hours).
 	pub const SlashDeferDuration: sp_staking::EraIndex = 1;
 	pub const MaxControllersInDeprecationBatch: u32 = 751;
@@ -285,6 +287,7 @@ impl pallet_staking_async::Config for Runtime {
 	type Reward = ();
 	type SessionsPerEra = SessionsPerEra;
 	type BondingDuration = BondingDuration;
+	type NominatorFastUnbondDuration = NominatorFastUnbondDuration;
 	type SlashDeferDuration = SlashDeferDuration;
 	type AdminOrigin = EitherOf<EnsureRoot<AccountId>, StakingAdmin>;
 	type EraPayout = EraPayout;

prdoc/pr_10502.prdoc

@@ -0,0 +1,24 @@
+# Schema: Polkadot SDK PRDoc Schema (prdoc) v1.0.0
+# See doc at https://raw.githubusercontent.com/paritytech/polkadot-sdk/master/prdoc/schema_user.json
+
+title: Allow nominators to be unslashable with configurable fast unbonding
+
+doc:
+  - audience: Runtime User
+    description: |
+      Nominators can now be set as unslashable via runtime configuration. When unslashable,
+      nominators use a configurable fast unbonding duration instead of the full bonding period.
+      Validators always use the full bonding duration regardless of this setting.
+
+      New config parameter `NominatorFastUnbondDuration` controls the unbonding time for
+      non-slashable nominators (recommended: 2 eras).
+
+crates:
+  - name: sp-staking
+    bump: minor
+  - name: pallet-staking-async
+    bump: minor
+  - name: pallet-nomination-pools
+    bump: patch
+  - name: asset-hub-westend-runtime
+    bump: minor

substrate/frame/nomination-pools/src/adapter.rs

@@ -90,9 +90,12 @@ pub trait StakeStrategy {
 	/// The type of staking strategy of the current adapter.
 	fn strategy_type() -> StakeStrategyType;
 
-	/// See [`StakingInterface::bonding_duration`].
+	/// See [`StakingInterface::nominator_bonding_duration`].
+	///
+	/// Pool accounts are nominators, so they use the nominator bonding duration which can be
+	/// shorter than the validator bonding duration when nominators are not slashable.
 	fn bonding_duration() -> EraIndex {
-		Self::CoreStaking::bonding_duration()
+		Self::CoreStaking::nominator_bonding_duration()
 	}
 
 	/// See [`StakingInterface::current_era`].

substrate/frame/nomination-pools/test-delegate-stake/Cargo.toml

@@ -32,9 +32,10 @@ pallet-bags-list = { default-features = true, workspace = true }
 pallet-balances = { default-features = true, workspace = true }
 pallet-delegated-staking = { default-features = true, workspace = true }
 pallet-nomination-pools = { default-features = true, workspace = true }
-pallet-staking = { default-features = true, workspace = true }
-pallet-staking-reward-curve = { default-features = true, workspace = true }
-pallet-timestamp = { default-features = true, workspace = true }
+pallet-staking-async = { workspace = true, default-features = true }
+pallet-staking-async-rc-client = { workspace = true, default-features = true }
+pallet-staking-reward-curve = { workspace = true, default-features = true }
+pallet-timestamp = { workspace = true, default-features = true }
 
 log = { workspace = true, default-features = true }
 sp-tracing = { default-features = true, workspace = true }