Add pallet BlackHole to Kusama AssetHub following WFC #539

Author: olanod

CHANGELOG.md

@@ -4,6 +4,12 @@ Changelog for the runtimes governed by the Polkadot Fellowship.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [Unreleased]
+
+### Added
+
+- Add pallet BlackHole to Kusama AssetHub following [WFC #539](https://kusama.subsquare.io/referenda/539)
+
 ## [1.6.1] 24.06.2025
 
 ### Changed

Cargo.lock

@@ -61,6 +61,7 @@ encointer-balances-tx-payment-rpc-runtime-api = { version = "~16.1.0", default-f
 encointer-kusama-runtime = { path = "system-parachains/encointer" }
 encointer-primitives = { version = "~16.4.0", default-features = false }
 enumflags2 = { version = "0.7.7" }
+fc-pallet-black-hole = { version = "1.0.0", default-features = false }
 frame-benchmarking = { version = "40.2.0", default-features = false }
 frame-election-provider-support = { version = "40.1.1", default-features = false }
 frame-executive = { version = "40.0.1", default-features = false }

Cargo.toml

@@ -103,6 +103,9 @@ assets-common = { workspace = true }
 pallet-xcm-bridge-hub-router = { workspace = true }
 snowbridge-inbound-queue-primitives = { workspace = true }
 
+# Frame contrib
+fc-pallet-black-hole = { workspace = true }
+
 [dev-dependencies]
 asset-test-utils = { workspace = true }
 parachains-runtimes-test-utils = { workspace = true }
@@ -124,6 +127,7 @@ runtime-benchmarks = [
 	"cumulus-pallet-xcmp-queue/runtime-benchmarks",
 	"cumulus-primitives-core/runtime-benchmarks",
 	"cumulus-primitives-utility/runtime-benchmarks",
+	"fc-pallet-black-hole/runtime-benchmarks",
 	"frame-benchmarking/runtime-benchmarks",
 	"frame-support/runtime-benchmarks",
 	"frame-system-benchmarking/runtime-benchmarks",
@@ -166,6 +170,7 @@ try-runtime = [
 	"cumulus-pallet-parachain-system/try-runtime",
 	"cumulus-pallet-xcm/try-runtime",
 	"cumulus-pallet-xcmp-queue/try-runtime",
+	"fc-pallet-black-hole/try-runtime",
 	"frame-executive/try-runtime",
 	"frame-support/try-runtime",
 	"frame-system/try-runtime",
@@ -212,6 +217,7 @@ std = [
 	"cumulus-primitives-aura/std",
 	"cumulus-primitives-core/std",
 	"cumulus-primitives-utility/std",
+	"fc-pallet-black-hole/std",
 	"frame-benchmarking?/std",
 	"frame-executive/std",
 	"frame-metadata-hash-extension/std",

system-parachains/asset-hubs/asset-hub-kusama/Cargo.toml

@@ -1061,6 +1061,24 @@ impl pallet_revive::Config for Runtime {
 	type FindAuthor = <Runtime as pallet_authorship::Config>::FindAuthor;
 }
 
+parameter_types! {
+	pub const BlackHolePalletId: PalletId = PalletId(*b"py/bhole");
+	pub const AdministrativeBodyId: BodyId = BodyId::Administration;
+}
+
+impl fc_pallet_black_hole::Config for Runtime {
+	type RuntimeEvent = RuntimeEvent;
+	type WeightInfo = ();
+	type EventHorizonDispatchOrigin = EitherOfDiverse<
+		EnsureRoot<AccountId>,
+		EnsureXcm<IsVoiceOfBody<GovernanceLocation, AdministrativeBodyId>>,
+	>;
+	type Balances = Balances;
+	type BlockNumberProvider = System;
+	type PalletId = BlackHolePalletId;
+	type BurnPeriod = ConstU32<HOURS>;
+}
+
 // Create the runtime by composing the FRAME pallets that were previously configured.
 construct_runtime!(
 	pub enum Runtime
@@ -1077,6 +1095,7 @@ construct_runtime!(
 		TransactionPayment: pallet_transaction_payment = 11,
 		AssetTxPayment: pallet_asset_conversion_tx_payment = 13,
 		Vesting: pallet_vesting = 14,
+		BlackHole: fc_pallet_black_hole = 15,
 
 		// Collator support. the order of these 5 are important and shall not change.
 		Authorship: pallet_authorship = 20,