polkadot-parachain: one chain-spec for all (#2457)

This PR removes some `ChainSpec` types which are not necessary
(left-overs from #1256). Currently `ChainSpec` does not have to be
generic over the specific `RuntimeGenesisConfig`, it is enough to use
single type for all:

https://github.com/paritytech/polkadot-sdk/blob/9f787018857660440182142adc806954d7d07709/cumulus/polkadot-parachain/src/chain_spec/mod.rs#L53-L54


related to: https://github.com/paritytech/polkadot-sdk/issues/25

---------

Co-authored-by: command-bot <>

cumulus/polkadot-parachain/src/chain_spec/asset_hubs.rs

@@ -15,7 +15,8 @@
 // along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
 
 use crate::chain_spec::{
-	get_account_id_from_seed, get_collator_keys_from_seed, Extensions, SAFE_XCM_VERSION,
+	get_account_id_from_seed, get_collator_keys_from_seed, Extensions, GenericChainSpec,
+	SAFE_XCM_VERSION,
 };
 use cumulus_primitives_core::ParaId;
 use hex_literal::hex;
@@ -23,16 +24,6 @@ use parachains_common::{AccountId, AssetHubPolkadotAuraId, AuraId, Balance as As
 use sc_service::ChainType;
 use sp_core::{crypto::UncheckedInto, sr25519};
 
-/// Specialized `ChainSpec` for the normal parachain runtime.
-pub type AssetHubPolkadotChainSpec =
-	sc_service::GenericChainSpec<asset_hub_polkadot_runtime::RuntimeGenesisConfig, Extensions>;
-pub type AssetHubKusamaChainSpec =
-	sc_service::GenericChainSpec<asset_hub_kusama_runtime::RuntimeGenesisConfig, Extensions>;
-pub type AssetHubWestendChainSpec =
-	sc_service::GenericChainSpec<asset_hub_westend_runtime::RuntimeGenesisConfig, Extensions>;
-pub type AssetHubRococoChainSpec =
-	sc_service::GenericChainSpec<asset_hub_rococo_runtime::RuntimeGenesisConfig, Extensions>;
-
 const ASSET_HUB_POLKADOT_ED: AssetHubBalance =
 	parachains_common::polkadot::currency::EXISTENTIAL_DEPOSIT;
 const ASSET_HUB_KUSAMA_ED: AssetHubBalance =
@@ -72,13 +63,13 @@ pub fn asset_hub_westend_session_keys(keys: AuraId) -> asset_hub_westend_runtime
 	asset_hub_westend_runtime::SessionKeys { aura: keys }
 }
 
-pub fn asset_hub_polkadot_development_config() -> AssetHubPolkadotChainSpec {
+pub fn asset_hub_polkadot_development_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 0.into());
 	properties.insert("tokenSymbol".into(), "DOT".into());
 	properties.insert("tokenDecimals".into(), 10.into());
 
-	AssetHubPolkadotChainSpec::builder(
+	GenericChainSpec::builder(
 		asset_hub_polkadot_runtime::WASM_BINARY
 			.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "polkadot-dev".into(), para_id: 1000 },
@@ -104,13 +95,13 @@ pub fn asset_hub_polkadot_development_config() -> AssetHubPolkadotChainSpec {
 	.build()
 }
 
-pub fn asset_hub_polkadot_local_config() -> AssetHubPolkadotChainSpec {
+pub fn asset_hub_polkadot_local_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 0.into());
 	properties.insert("tokenSymbol".into(), "DOT".into());
 	properties.insert("tokenDecimals".into(), 10.into());
 
-	AssetHubPolkadotChainSpec::builder(
+	GenericChainSpec::builder(
 		asset_hub_polkadot_runtime::WASM_BINARY
 			.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "polkadot-local".into(), para_id: 1000 },
@@ -152,13 +143,13 @@ pub fn asset_hub_polkadot_local_config() -> AssetHubPolkadotChainSpec {
 }
 
 // Not used for syncing, but just to determine the genesis values set for the upgrade from shell.
-pub fn asset_hub_polkadot_config() -> AssetHubPolkadotChainSpec {
+pub fn asset_hub_polkadot_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 0.into());
 	properties.insert("tokenSymbol".into(), "DOT".into());
 	properties.insert("tokenDecimals".into(), 10.into());
 
-	AssetHubPolkadotChainSpec::builder(
+	GenericChainSpec::builder(
 		asset_hub_polkadot_runtime::WASM_BINARY
 			.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "polkadot".into(), para_id: 1000 },
@@ -249,13 +240,13 @@ fn asset_hub_polkadot_genesis(
 	})
 }
 
-pub fn asset_hub_kusama_development_config() -> AssetHubKusamaChainSpec {
+pub fn asset_hub_kusama_development_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 2.into());
 	properties.insert("tokenSymbol".into(), "KSM".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 
-	AssetHubKusamaChainSpec::builder(
+	GenericChainSpec::builder(
 		asset_hub_kusama_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "kusama-dev".into(), para_id: 1000 },
 	)
@@ -280,13 +271,13 @@ pub fn asset_hub_kusama_development_config() -> AssetHubKusamaChainSpec {
 	.build()
 }
 
-pub fn asset_hub_kusama_local_config() -> AssetHubKusamaChainSpec {
+pub fn asset_hub_kusama_local_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 2.into());
 	properties.insert("tokenSymbol".into(), "KSM".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 
-	AssetHubKusamaChainSpec::builder(
+	GenericChainSpec::builder(
 		asset_hub_kusama_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "kusama-local".into(), para_id: 1000 },
 	)
@@ -325,13 +316,13 @@ pub fn asset_hub_kusama_local_config() -> AssetHubKusamaChainSpec {
 	.build()
 }
 
-pub fn asset_hub_kusama_config() -> AssetHubKusamaChainSpec {
+pub fn asset_hub_kusama_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 2.into());
 	properties.insert("tokenSymbol".into(), "KSM".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 
-	AssetHubKusamaChainSpec::builder(
+	GenericChainSpec::builder(
 		asset_hub_kusama_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "kusama".into(), para_id: 1000 },
 	)
@@ -407,12 +398,12 @@ fn asset_hub_kusama_genesis(
 	})
 }
 
-pub fn asset_hub_westend_development_config() -> AssetHubWestendChainSpec {
+pub fn asset_hub_westend_development_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("tokenSymbol".into(), "WND".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 
-	AssetHubWestendChainSpec::builder(
+	GenericChainSpec::builder(
 		asset_hub_westend_runtime::WASM_BINARY
 			.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "westend".into(), para_id: 1000 },
@@ -439,12 +430,12 @@ pub fn asset_hub_westend_development_config() -> AssetHubWestendChainSpec {
 	.build()
 }
 
-pub fn asset_hub_westend_local_config() -> AssetHubWestendChainSpec {
+pub fn asset_hub_westend_local_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("tokenSymbol".into(), "WND".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 
-	AssetHubWestendChainSpec::builder(
+	GenericChainSpec::builder(
 		asset_hub_westend_runtime::WASM_BINARY
 			.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "westend-local".into(), para_id: 1000 },
@@ -485,12 +476,12 @@ pub fn asset_hub_westend_local_config() -> AssetHubWestendChainSpec {
 	.build()
 }
 
-pub fn asset_hub_westend_config() -> AssetHubWestendChainSpec {
+pub fn asset_hub_westend_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("tokenSymbol".into(), "WND".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 
-	AssetHubWestendChainSpec::builder(
+	GenericChainSpec::builder(
 		asset_hub_westend_runtime::WASM_BINARY
 			.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "westend".into(), para_id: 1000 },
@@ -569,7 +560,7 @@ fn asset_hub_westend_genesis(
 	})
 }
 
-pub fn asset_hub_rococo_development_config() -> AssetHubRococoChainSpec {
+pub fn asset_hub_rococo_development_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 42.into());
 	properties.insert("tokenSymbol".into(), "ROC".into());
@@ -587,8 +578,8 @@ fn asset_hub_rococo_like_development_config(
 	name: &str,
 	chain_id: &str,
 	para_id: u32,
-) -> AssetHubRococoChainSpec {
-	AssetHubRococoChainSpec::builder(
+) -> GenericChainSpec {
+	GenericChainSpec::builder(
 		asset_hub_rococo_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "rococo-dev".into(), para_id },
 	)
@@ -614,7 +605,7 @@ fn asset_hub_rococo_like_development_config(
 	.build()
 }
 
-pub fn asset_hub_rococo_local_config() -> AssetHubRococoChainSpec {
+pub fn asset_hub_rococo_local_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 42.into());
 	properties.insert("tokenSymbol".into(), "ROC".into());
@@ -632,8 +623,8 @@ fn asset_hub_rococo_like_local_config(
 	name: &str,
 	chain_id: &str,
 	para_id: u32,
-) -> AssetHubRococoChainSpec {
-	AssetHubRococoChainSpec::builder(
+) -> GenericChainSpec {
+	GenericChainSpec::builder(
 		asset_hub_rococo_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "rococo-local".into(), para_id },
 	)
@@ -673,12 +664,12 @@ fn asset_hub_rococo_like_local_config(
 	.build()
 }
 
-pub fn asset_hub_rococo_genesis_config() -> AssetHubRococoChainSpec {
+pub fn asset_hub_rococo_genesis_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("tokenSymbol".into(), "ROC".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 	let para_id = 1000;
-	AssetHubRococoChainSpec::builder(
+	GenericChainSpec::builder(
 		asset_hub_rococo_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "rococo".into(), para_id },
 	)

cumulus/polkadot-parachain/src/chain_spec/bridge_hubs.rs

@@ -14,12 +14,12 @@
 // You should have received a copy of the GNU General Public License
 // along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
 
-use crate::chain_spec::{get_account_id_from_seed, get_collator_keys_from_seed};
+use crate::chain_spec::{get_account_id_from_seed, get_collator_keys_from_seed, GenericChainSpec};
 use cumulus_primitives_core::ParaId;
 use parachains_common::Balance as BridgeHubBalance;
 use sc_chain_spec::ChainSpec;
 use sp_core::sr25519;
-use std::{path::PathBuf, str::FromStr};
+use std::str::FromStr;
 
 /// Collects all supported BridgeHub configurations
 #[derive(Debug, PartialEq)]
@@ -71,31 +71,9 @@ impl FromStr for BridgeHubRuntimeType {
 impl BridgeHubRuntimeType {
 	pub const ID_PREFIX: &'static str = "bridge-hub";
 
-	pub fn chain_spec_from_json_file(&self, path: PathBuf) -> Result<Box<dyn ChainSpec>, String> {
-		match self {
-			BridgeHubRuntimeType::Polkadot |
-			BridgeHubRuntimeType::PolkadotLocal |
-			BridgeHubRuntimeType::PolkadotDevelopment =>
-				Ok(Box::new(polkadot::BridgeHubChainSpec::from_json_file(path)?)),
-			BridgeHubRuntimeType::Kusama |
-			BridgeHubRuntimeType::KusamaLocal |
-			BridgeHubRuntimeType::KusamaDevelopment =>
-				Ok(Box::new(kusama::BridgeHubChainSpec::from_json_file(path)?)),
-			BridgeHubRuntimeType::Westend |
-			BridgeHubRuntimeType::WestendLocal |
-			BridgeHubRuntimeType::WestendDevelopment =>
-				Ok(Box::new(westend::BridgeHubChainSpec::from_json_file(path)?)),
-			BridgeHubRuntimeType::Rococo |
-			BridgeHubRuntimeType::RococoLocal |
-			BridgeHubRuntimeType::RococoDevelopment =>
-				Ok(Box::new(rococo::BridgeHubChainSpec::from_json_file(path)?)),
-		}
-	}
-
 	pub fn load_config(&self) -> Result<Box<dyn ChainSpec>, String> {
 		match self {
-			BridgeHubRuntimeType::Polkadot =>
-				Ok(Box::new(polkadot::BridgeHubChainSpec::from_json_bytes(
+			BridgeHubRuntimeType::Polkadot => Ok(Box::new(GenericChainSpec::from_json_bytes(
 				&include_bytes!("../../chain-specs/bridge-hub-polkadot.json")[..],
 			)?)),
 			BridgeHubRuntimeType::PolkadotLocal => Ok(Box::new(polkadot::local_config(
@@ -110,8 +88,7 @@ impl BridgeHubRuntimeType {
 				"polkadot-dev",
 				ParaId::new(1002),
 			))),
-			BridgeHubRuntimeType::Kusama =>
-				Ok(Box::new(kusama::BridgeHubChainSpec::from_json_bytes(
+			BridgeHubRuntimeType::Kusama => Ok(Box::new(GenericChainSpec::from_json_bytes(
 				&include_bytes!("../../chain-specs/bridge-hub-kusama.json")[..],
 			)?)),
 			BridgeHubRuntimeType::KusamaLocal => Ok(Box::new(kusama::local_config(
@@ -126,8 +103,7 @@ impl BridgeHubRuntimeType {
 				"kusama-dev",
 				ParaId::new(1003),
 			))),
-			BridgeHubRuntimeType::Westend =>
-				Ok(Box::new(westend::BridgeHubChainSpec::from_json_bytes(
+			BridgeHubRuntimeType::Westend => Ok(Box::new(GenericChainSpec::from_json_bytes(
 				&include_bytes!("../../chain-specs/bridge-hub-westend.json")[..],
 			)?)),
 			BridgeHubRuntimeType::WestendLocal => Ok(Box::new(westend::local_config(
@@ -144,8 +120,7 @@ impl BridgeHubRuntimeType {
 				ParaId::new(1002),
 				Some("Bob".to_string()),
 			))),
-			BridgeHubRuntimeType::Rococo =>
-				Ok(Box::new(rococo::BridgeHubChainSpec::from_json_bytes(
+			BridgeHubRuntimeType::Rococo => Ok(Box::new(GenericChainSpec::from_json_bytes(
 				&include_bytes!("../../chain-specs/bridge-hub-rococo.json")[..],
 			)?)),
 			BridgeHubRuntimeType::RococoLocal => Ok(Box::new(rococo::local_config(
@@ -184,7 +159,7 @@ fn ensure_id(id: &str) -> Result<&str, String> {
 /// Sub-module for Rococo setup
 pub mod rococo {
 	use super::{get_account_id_from_seed, get_collator_keys_from_seed, sr25519, ParaId};
-	use crate::chain_spec::{Extensions, SAFE_XCM_VERSION};
+	use crate::chain_spec::{Extensions, GenericChainSpec, SAFE_XCM_VERSION};
 	use parachains_common::{AccountId, AuraId};
 	use sc_chain_spec::ChainType;
 
@@ -196,9 +171,6 @@ pub mod rococo {
 	const BRIDGE_HUB_ROCOCO_ED: BridgeHubBalance =
 		parachains_common::rococo::currency::EXISTENTIAL_DEPOSIT;
 
-	/// Specialized `ChainSpec` for the normal parachain runtime.
-	pub type BridgeHubChainSpec = sc_service::GenericChainSpec<(), Extensions>;
-
 	pub fn local_config<ModifyProperties: Fn(&mut sc_chain_spec::Properties)>(
 		id: &str,
 		chain_name: &str,
@@ -206,7 +178,7 @@ pub mod rococo {
 		para_id: ParaId,
 		bridges_pallet_owner_seed: Option<String>,
 		modify_props: ModifyProperties,
-	) -> BridgeHubChainSpec {
+	) -> GenericChainSpec {
 		// Rococo defaults
 		let mut properties = sc_chain_spec::Properties::new();
 		properties.insert("ss58Format".into(), 42.into());
@@ -214,7 +186,7 @@ pub mod rococo {
 		properties.insert("tokenDecimals".into(), 12.into());
 		modify_props(&mut properties);
 
-		BridgeHubChainSpec::builder(
+		GenericChainSpec::builder(
 			bridge_hub_rococo_runtime::WASM_BINARY
 				.expect("WASM binary was not built, please build it!"),
 			Extensions { relay_chain: relay_chain.to_string(), para_id: para_id.into() },
@@ -303,7 +275,8 @@ pub mod rococo {
 pub mod kusama {
 	use super::{BridgeHubBalance, ParaId};
 	use crate::chain_spec::{
-		get_account_id_from_seed, get_collator_keys_from_seed, Extensions, SAFE_XCM_VERSION,
+		get_account_id_from_seed, get_collator_keys_from_seed, Extensions, GenericChainSpec,
+		SAFE_XCM_VERSION,
 	};
 	use parachains_common::{AccountId, AuraId};
 	use sc_chain_spec::ChainType;
@@ -315,21 +288,18 @@ pub mod kusama {
 	const BRIDGE_HUB_KUSAMA_ED: BridgeHubBalance =
 		parachains_common::kusama::currency::EXISTENTIAL_DEPOSIT;
 
-	/// Specialized `ChainSpec` for the normal parachain runtime.
-	pub type BridgeHubChainSpec = sc_service::GenericChainSpec<(), Extensions>;
-
 	pub fn local_config(
 		id: &str,
 		chain_name: &str,
 		relay_chain: &str,
 		para_id: ParaId,
-	) -> BridgeHubChainSpec {
+	) -> GenericChainSpec {
 		let mut properties = sc_chain_spec::Properties::new();
 		properties.insert("ss58Format".into(), 2.into());
 		properties.insert("tokenSymbol".into(), "KSM".into());
 		properties.insert("tokenDecimals".into(), 12.into());
 
-		BridgeHubChainSpec::builder(
+		GenericChainSpec::builder(
 			bridge_hub_kusama_runtime::WASM_BINARY
 				.expect("WASM binary was not built, please build it!"),
 			Extensions { relay_chain: relay_chain.to_string(), para_id: para_id.into() },
@@ -411,7 +381,7 @@ pub mod kusama {
 /// Sub-module for Westend setup.
 pub mod westend {
 	use super::{get_account_id_from_seed, get_collator_keys_from_seed, sr25519, ParaId};
-	use crate::chain_spec::{Extensions, SAFE_XCM_VERSION};
+	use crate::chain_spec::{Extensions, GenericChainSpec, SAFE_XCM_VERSION};
 	use parachains_common::{AccountId, AuraId};
 	use sc_chain_spec::ChainType;
 
@@ -423,22 +393,18 @@ pub mod westend {
 	const BRIDGE_HUB_WESTEND_ED: BridgeHubBalance =
 		parachains_common::westend::currency::EXISTENTIAL_DEPOSIT;
 
-	/// Specialized `ChainSpec` for the normal parachain runtime.
-	pub type BridgeHubChainSpec =
-		sc_service::GenericChainSpec<bridge_hub_westend_runtime::RuntimeGenesisConfig, Extensions>;
-
 	pub fn local_config(
 		id: &str,
 		chain_name: &str,
 		relay_chain: &str,
 		para_id: ParaId,
 		bridges_pallet_owner_seed: Option<String>,
-	) -> BridgeHubChainSpec {
+	) -> GenericChainSpec {
 		let mut properties = sc_chain_spec::Properties::new();
 		properties.insert("tokenSymbol".into(), "WND".into());
 		properties.insert("tokenDecimals".into(), 12.into());
 
-		BridgeHubChainSpec::builder(
+		GenericChainSpec::builder(
 			bridge_hub_westend_runtime::WASM_BINARY
 				.expect("WASM binary was not build, please build it!"),
 			Extensions { relay_chain: relay_chain.to_string(), para_id: para_id.into() },
@@ -527,7 +493,8 @@ pub mod westend {
 pub mod polkadot {
 	use super::{BridgeHubBalance, ParaId};
 	use crate::chain_spec::{
-		get_account_id_from_seed, get_collator_keys_from_seed, Extensions, SAFE_XCM_VERSION,
+		get_account_id_from_seed, get_collator_keys_from_seed, Extensions, GenericChainSpec,
+		SAFE_XCM_VERSION,
 	};
 	use parachains_common::{AccountId, AuraId};
 	use sc_chain_spec::ChainType;
@@ -539,21 +506,18 @@ pub mod polkadot {
 	const BRIDGE_HUB_POLKADOT_ED: BridgeHubBalance =
 		parachains_common::polkadot::currency::EXISTENTIAL_DEPOSIT;
 
-	/// Specialized `ChainSpec` for the normal parachain runtime.
-	pub type BridgeHubChainSpec = sc_service::GenericChainSpec<(), Extensions>;
-
 	pub fn local_config(
 		id: &str,
 		chain_name: &str,
 		relay_chain: &str,
 		para_id: ParaId,
-	) -> BridgeHubChainSpec {
+	) -> GenericChainSpec {
 		let mut properties = sc_chain_spec::Properties::new();
 		properties.insert("ss58Format".into(), 0.into());
 		properties.insert("tokenSymbol".into(), "DOT".into());
 		properties.insert("tokenDecimals".into(), 10.into());
 
-		BridgeHubChainSpec::builder(
+		GenericChainSpec::builder(
 			bridge_hub_polkadot_runtime::WASM_BINARY
 				.expect("WASM binary was not built, please build it!"),
 			Extensions { relay_chain: relay_chain.to_string(), para_id: para_id.into() },

cumulus/polkadot-parachain/src/chain_spec/collectives.rs

@@ -15,16 +15,14 @@
 // along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
 
 use crate::chain_spec::{
-	get_account_id_from_seed, get_collator_keys_from_seed, Extensions, SAFE_XCM_VERSION,
+	get_account_id_from_seed, get_collator_keys_from_seed, Extensions, GenericChainSpec,
+	SAFE_XCM_VERSION,
 };
 use cumulus_primitives_core::ParaId;
 use parachains_common::{AccountId, AuraId, Balance as CollectivesBalance};
 use sc_service::ChainType;
 use sp_core::sr25519;
 
-pub type CollectivesPolkadotChainSpec = sc_service::GenericChainSpec<(), Extensions>;
-pub type CollectivesWestendChainSpec = sc_service::GenericChainSpec<(), Extensions>;
-
 const COLLECTIVES_POLKADOT_ED: CollectivesBalance =
 	parachains_common::polkadot::currency::EXISTENTIAL_DEPOSIT;
 const COLLECTIVES_WESTEND_ED: CollectivesBalance =
@@ -39,13 +37,13 @@ pub fn collectives_polkadot_session_keys(
 	collectives_polkadot_runtime::SessionKeys { aura: keys }
 }
 
-pub fn collectives_polkadot_development_config() -> CollectivesPolkadotChainSpec {
+pub fn collectives_polkadot_development_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 0.into());
 	properties.insert("tokenSymbol".into(), "DOT".into());
 	properties.insert("tokenDecimals".into(), 10.into());
 
-	CollectivesPolkadotChainSpec::builder(
+	GenericChainSpec::builder(
 		collectives_polkadot_runtime::WASM_BINARY
 			.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "polkadot-dev".into(), para_id: 1002 },
@@ -75,13 +73,13 @@ pub fn collectives_polkadot_development_config() -> CollectivesPolkadotChainSpec
 }
 
 /// Collectives Polkadot Local Config.
-pub fn collectives_polkadot_local_config() -> CollectivesPolkadotChainSpec {
+pub fn collectives_polkadot_local_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 0.into());
 	properties.insert("tokenSymbol".into(), "DOT".into());
 	properties.insert("tokenDecimals".into(), 10.into());
 
-	CollectivesPolkadotChainSpec::builder(
+	GenericChainSpec::builder(
 		collectives_polkadot_runtime::WASM_BINARY
 			.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "polkadot-local".into(), para_id: 1002 },
@@ -169,13 +167,13 @@ pub fn collectives_westend_session_keys(keys: AuraId) -> collectives_westend_run
 	collectives_westend_runtime::SessionKeys { aura: keys }
 }
 
-pub fn collectives_westend_development_config() -> CollectivesWestendChainSpec {
+pub fn collectives_westend_development_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 42.into());
 	properties.insert("tokenSymbol".into(), "WND".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 
-	CollectivesWestendChainSpec::builder(
+	GenericChainSpec::builder(
 		collectives_westend_runtime::WASM_BINARY
 			.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "westend-dev".into(), para_id: 1002 },
@@ -205,13 +203,13 @@ pub fn collectives_westend_development_config() -> CollectivesWestendChainSpec {
 }
 
 /// Collectives Westend Local Config.
-pub fn collectives_westend_local_config() -> CollectivesWestendChainSpec {
+pub fn collectives_westend_local_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 42.into());
 	properties.insert("tokenSymbol".into(), "WND".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 
-	CollectivesWestendChainSpec::builder(
+	GenericChainSpec::builder(
 		collectives_westend_runtime::WASM_BINARY
 			.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "westend-local".into(), para_id: 1002 },

cumulus/polkadot-parachain/src/chain_spec/contracts.rs

@@ -15,7 +15,8 @@
 // along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
 
 use crate::chain_spec::{
-	get_account_id_from_seed, get_collator_keys_from_seed, Extensions, SAFE_XCM_VERSION,
+	get_account_id_from_seed, get_collator_keys_from_seed, Extensions, GenericChainSpec,
+	SAFE_XCM_VERSION,
 };
 use cumulus_primitives_core::ParaId;
 use hex_literal::hex;
@@ -23,8 +24,6 @@ use parachains_common::{AccountId, AuraId};
 use sc_service::ChainType;
 use sp_core::{crypto::UncheckedInto, sr25519};
 
-pub type ContractsRococoChainSpec = sc_service::GenericChainSpec<(), Extensions>;
-
 /// No relay chain suffix because the id is the same over all relay chains.
 const CONTRACTS_PARACHAIN_ID: u32 = 1002;
 
@@ -32,12 +31,12 @@ const CONTRACTS_PARACHAIN_ID: u32 = 1002;
 const CONTRACTS_ROCOCO_ED: contracts_rococo_runtime::Balance =
 	parachains_common::rococo::currency::EXISTENTIAL_DEPOSIT;
 
-pub fn contracts_rococo_development_config() -> ContractsRococoChainSpec {
+pub fn contracts_rococo_development_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("tokenSymbol".into(), "ROC".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 
-	ContractsRococoChainSpec::builder(
+	GenericChainSpec::builder(
 		contracts_rococo_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions {
 			relay_chain: "rococo-local".into(), // You MUST set this to the correct network!
@@ -79,12 +78,12 @@ pub fn contracts_rococo_development_config() -> ContractsRococoChainSpec {
 	.build()
 }
 
-pub fn contracts_rococo_local_config() -> ContractsRococoChainSpec {
+pub fn contracts_rococo_local_config() -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("tokenSymbol".into(), "ROC".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 
-	ContractsRococoChainSpec::builder(
+	GenericChainSpec::builder(
 		contracts_rococo_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions {
 			relay_chain: "rococo-local".into(), // You MUST set this to the correct network!
@@ -126,13 +125,13 @@ pub fn contracts_rococo_local_config() -> ContractsRococoChainSpec {
 	.build()
 }
 
-pub fn contracts_rococo_config() -> ContractsRococoChainSpec {
+pub fn contracts_rococo_config() -> GenericChainSpec {
 	// Give your base currency a unit name and decimal places
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("tokenSymbol".into(), "ROC".into());
 	properties.insert("tokenDecimals".into(), 12.into());
 
-	ContractsRococoChainSpec::builder(
+	GenericChainSpec::builder(
 	 		contracts_rococo_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 			Extensions { relay_chain: "rococo".into(), para_id: CONTRACTS_PARACHAIN_ID }
 		)

cumulus/polkadot-parachain/src/chain_spec/glutton.rs

@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
 
-use crate::chain_spec::{get_account_id_from_seed, Extensions};
+use crate::chain_spec::{get_account_id_from_seed, Extensions, GenericChainSpec};
 use cumulus_primitives_core::ParaId;
 use parachains_common::AuraId;
 use sc_service::ChainType;
@@ -22,12 +22,8 @@ use sp_core::sr25519;
 
 use super::get_collator_keys_from_seed;
 
-/// Specialized `ChainSpec` for the Glutton parachain runtime.
-pub type GluttonChainSpec = sc_service::GenericChainSpec<(), Extensions>;
-pub type GluttonWestendChainSpec = sc_service::GenericChainSpec<(), Extensions>;
-
-pub fn glutton_development_config(para_id: ParaId) -> GluttonChainSpec {
-	GluttonChainSpec::builder(
+pub fn glutton_development_config(para_id: ParaId) -> GenericChainSpec {
+	GenericChainSpec::builder(
 		glutton_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "kusama-dev".into(), para_id: para_id.into() },
 	)
@@ -41,8 +37,8 @@ pub fn glutton_development_config(para_id: ParaId) -> GluttonChainSpec {
 	.build()
 }
 
-pub fn glutton_local_config(para_id: ParaId) -> GluttonChainSpec {
-	GluttonChainSpec::builder(
+pub fn glutton_local_config(para_id: ParaId) -> GenericChainSpec {
+	GenericChainSpec::builder(
 		glutton_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "kusama-local".into(), para_id: para_id.into() },
 	)
@@ -59,11 +55,11 @@ pub fn glutton_local_config(para_id: ParaId) -> GluttonChainSpec {
 	.build()
 }
 
-pub fn glutton_config(para_id: ParaId) -> GluttonChainSpec {
+pub fn glutton_config(para_id: ParaId) -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 2.into());
 
-	GluttonChainSpec::builder(
+	GenericChainSpec::builder(
 		glutton_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "kusama".into(), para_id: para_id.into() },
 	)
@@ -94,8 +90,8 @@ fn glutton_genesis(parachain_id: ParaId, collators: Vec<AuraId>) -> serde_json::
 	})
 }
 
-pub fn glutton_westend_development_config(para_id: ParaId) -> GluttonWestendChainSpec {
-	GluttonWestendChainSpec::builder(
+pub fn glutton_westend_development_config(para_id: ParaId) -> GenericChainSpec {
+	GenericChainSpec::builder(
 		glutton_westend_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "westend-dev".into(), para_id: para_id.into() },
 	)
@@ -109,8 +105,8 @@ pub fn glutton_westend_development_config(para_id: ParaId) -> GluttonWestendChai
 	.build()
 }
 
-pub fn glutton_westend_local_config(para_id: ParaId) -> GluttonWestendChainSpec {
-	GluttonWestendChainSpec::builder(
+pub fn glutton_westend_local_config(para_id: ParaId) -> GenericChainSpec {
+	GenericChainSpec::builder(
 		glutton_westend_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "westend-local".into(), para_id: para_id.into() },
 	)
@@ -127,11 +123,11 @@ pub fn glutton_westend_local_config(para_id: ParaId) -> GluttonWestendChainSpec
 	.build()
 }
 
-pub fn glutton_westend_config(para_id: ParaId) -> GluttonWestendChainSpec {
+pub fn glutton_westend_config(para_id: ParaId) -> GenericChainSpec {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("ss58Format".into(), 42.into());
 
-	GluttonChainSpec::builder(
+	GenericChainSpec::builder(
 		glutton_westend_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "westend".into(), para_id: para_id.into() },
 	)

cumulus/polkadot-parachain/src/chain_spec/mod.rs

@@ -50,6 +50,9 @@ impl Extensions {
 	}
 }
 
+/// Generic chain spec for all polkadot-parachain runtimes
+pub type GenericChainSpec = sc_service::GenericChainSpec<(), Extensions>;
+
 /// Helper function to generate a crypto pair from seed
 pub fn get_from_seed<TPublic: Public>(seed: &str) -> <TPublic::Pair as Pair>::Public {
 	TPublic::Pair::from_string(&format!("//{}", seed), None)

cumulus/polkadot-parachain/src/chain_spec/penpal.rs

@@ -15,23 +15,22 @@
 // along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
 
 use crate::chain_spec::{
-	get_account_id_from_seed, get_collator_keys_from_seed, Extensions, SAFE_XCM_VERSION,
+	get_account_id_from_seed, get_collator_keys_from_seed, Extensions, GenericChainSpec,
+	SAFE_XCM_VERSION,
 };
 use cumulus_primitives_core::ParaId;
 use parachains_common::{AccountId, AuraId};
 use sc_service::ChainType;
 use sp_core::sr25519;
-/// Specialized `ChainSpec` for the normal parachain runtime.
-pub type PenpalChainSpec = sc_service::GenericChainSpec<(), Extensions>;
 
-pub fn get_penpal_chain_spec(id: ParaId, relay_chain: &str) -> PenpalChainSpec {
+pub fn get_penpal_chain_spec(id: ParaId, relay_chain: &str) -> GenericChainSpec {
 	// Give your base currency a unit name and decimal places
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("tokenSymbol".into(), "UNIT".into());
 	properties.insert("tokenDecimals".into(), 12u32.into());
 	properties.insert("ss58Format".into(), 42u32.into());
 
-	PenpalChainSpec::builder(
+	GenericChainSpec::builder(
 		penpal_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions {
 			relay_chain: relay_chain.into(), // You MUST set this to the correct network!

cumulus/polkadot-parachain/src/chain_spec/rococo_parachain.rs

@@ -16,7 +16,7 @@
 
 //! ChainSpecs dedicated to Rococo parachain setups (for testing and example purposes)
 
-use crate::chain_spec::{get_from_seed, Extensions, SAFE_XCM_VERSION};
+use crate::chain_spec::{get_from_seed, Extensions, GenericChainSpec, SAFE_XCM_VERSION};
 use cumulus_primitives_core::ParaId;
 use hex_literal::hex;
 use parachains_common::AccountId;
@@ -25,10 +25,8 @@ use rococo_parachain_runtime::AuraId;
 use sc_chain_spec::ChainType;
 use sp_core::{crypto::UncheckedInto, sr25519};
 
-pub type RococoParachainChainSpec = sc_service::GenericChainSpec<(), Extensions>;
-
-pub fn rococo_parachain_local_config() -> RococoParachainChainSpec {
-	RococoParachainChainSpec::builder(
+pub fn rococo_parachain_local_config() -> GenericChainSpec {
+	GenericChainSpec::builder(
 		rococo_parachain_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "rococo-local".into(), para_id: 1000 },
 	)
@@ -57,9 +55,9 @@ pub fn rococo_parachain_local_config() -> RococoParachainChainSpec {
 	.build()
 }
 
-pub fn staging_rococo_parachain_local_config() -> RococoParachainChainSpec {
+pub fn staging_rococo_parachain_local_config() -> GenericChainSpec {
 	#[allow(deprecated)]
-	RococoParachainChainSpec::builder(
+	GenericChainSpec::builder(
 		rococo_parachain_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "rococo-local".into(), para_id: 1000 },
 	)

cumulus/polkadot-parachain/src/chain_spec/seedling.rs

@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
 
-use crate::chain_spec::{get_account_id_from_seed, Extensions};
+use crate::chain_spec::{get_account_id_from_seed, Extensions, GenericChainSpec};
 use cumulus_primitives_core::ParaId;
 use parachains_common::{AccountId, AuraId};
 use sc_service::ChainType;
@@ -22,11 +22,8 @@ use sp_core::sr25519;
 
 use super::get_collator_keys_from_seed;
 
-/// Specialized `ChainSpec` for the seedling parachain runtime.
-pub type SeedlingChainSpec = sc_service::GenericChainSpec<(), Extensions>;
-
-pub fn get_seedling_chain_spec() -> SeedlingChainSpec {
-	SeedlingChainSpec::builder(
+pub fn get_seedling_chain_spec() -> GenericChainSpec {
+	GenericChainSpec::builder(
 		seedling_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "westend".into(), para_id: 2000 },
 	)

cumulus/polkadot-parachain/src/chain_spec/shell.rs

@@ -14,18 +14,15 @@
 // You should have received a copy of the GNU General Public License
 // along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
 
-use crate::chain_spec::Extensions;
+use crate::chain_spec::{Extensions, GenericChainSpec};
 use cumulus_primitives_core::ParaId;
 use parachains_common::AuraId;
 use sc_service::ChainType;
 
 use super::get_collator_keys_from_seed;
 
-/// Specialized `ChainSpec` for the shell parachain runtime.
-pub type ShellChainSpec = sc_service::GenericChainSpec<(), Extensions>;
-
-pub fn get_shell_chain_spec() -> ShellChainSpec {
-	ShellChainSpec::builder(
+pub fn get_shell_chain_spec() -> GenericChainSpec {
+	GenericChainSpec::builder(
 		shell_runtime::WASM_BINARY.expect("WASM binary was not built, please build it!"),
 		Extensions { relay_chain: "westend".into(), para_id: 1000 },
 	)

cumulus/polkadot-parachain/src/command.rs

@@ -16,6 +16,7 @@
 
 use crate::{
 	chain_spec,
+	chain_spec::GenericChainSpec,
 	cli::{Cli, RelayChainCli, Subcommand},
 	fake_runtime_api::{
 		asset_hub_polkadot_aura::RuntimeApi as AssetHubPolkadotRuntimeApi, aura::RuntimeApi,
@@ -128,16 +129,13 @@ fn load_spec(id: &str) -> std::result::Result<Box<dyn ChainSpec>, String> {
 		// - Defaul-like
 		"staging" =>
 			Box::new(chain_spec::rococo_parachain::staging_rococo_parachain_local_config()),
-		"tick" =>
-			Box::new(chain_spec::rococo_parachain::RococoParachainChainSpec::from_json_bytes(
+		"tick" => Box::new(GenericChainSpec::from_json_bytes(
 			&include_bytes!("../chain-specs/tick.json")[..],
 		)?),
-		"trick" =>
-			Box::new(chain_spec::rococo_parachain::RococoParachainChainSpec::from_json_bytes(
+		"trick" => Box::new(GenericChainSpec::from_json_bytes(
 			&include_bytes!("../chain-specs/trick.json")[..],
 		)?),
-		"track" =>
-			Box::new(chain_spec::rococo_parachain::RococoParachainChainSpec::from_json_bytes(
+		"track" => Box::new(GenericChainSpec::from_json_bytes(
 			&include_bytes!("../chain-specs/track.json")[..],
 		)?),
 
@@ -154,8 +152,7 @@ fn load_spec(id: &str) -> std::result::Result<Box<dyn ChainSpec>, String> {
 		"asset-hub-polkadot-genesis" | "statemint-genesis" =>
 			Box::new(chain_spec::asset_hubs::asset_hub_polkadot_config()),
 		// the shell-based chain spec as used for syncing
-		"asset-hub-polkadot" | "statemint" =>
-			Box::new(chain_spec::asset_hubs::AssetHubPolkadotChainSpec::from_json_bytes(
+		"asset-hub-polkadot" | "statemint" => Box::new(GenericChainSpec::from_json_bytes(
 			&include_bytes!("../chain-specs/asset-hub-polkadot.json")[..],
 		)?),
 
@@ -168,8 +165,7 @@ fn load_spec(id: &str) -> std::result::Result<Box<dyn ChainSpec>, String> {
 		"asset-hub-kusama-genesis" | "statemine-genesis" =>
 			Box::new(chain_spec::asset_hubs::asset_hub_kusama_config()),
 		// the shell-based chain spec as used for syncing
-		"asset-hub-kusama" | "statemine" =>
-			Box::new(chain_spec::asset_hubs::AssetHubKusamaChainSpec::from_json_bytes(
+		"asset-hub-kusama" | "statemine" => Box::new(GenericChainSpec::from_json_bytes(
 			&include_bytes!("../chain-specs/asset-hub-kusama.json")[..],
 		)?),
 
@@ -181,8 +177,7 @@ fn load_spec(id: &str) -> std::result::Result<Box<dyn ChainSpec>, String> {
 		// the chain spec as used for generating the upgrade genesis values
 		"asset-hub-rococo-genesis" =>
 			Box::new(chain_spec::asset_hubs::asset_hub_rococo_genesis_config()),
-		"asset-hub-rococo" =>
-			Box::new(chain_spec::asset_hubs::AssetHubRococoChainSpec::from_json_bytes(
+		"asset-hub-rococo" => Box::new(GenericChainSpec::from_json_bytes(
 			&include_bytes!("../chain-specs/asset-hub-rococo.json")[..],
 		)?),
 
@@ -195,8 +190,7 @@ fn load_spec(id: &str) -> std::result::Result<Box<dyn ChainSpec>, String> {
 		"asset-hub-westend-genesis" | "westmint-genesis" =>
 			Box::new(chain_spec::asset_hubs::asset_hub_westend_config()),
 		// the shell-based chain spec as used for syncing
-		"asset-hub-westend" | "westmint" =>
-			Box::new(chain_spec::asset_hubs::AssetHubWestendChainSpec::from_json_bytes(
+		"asset-hub-westend" | "westmint" => Box::new(GenericChainSpec::from_json_bytes(
 			&include_bytes!("../chain-specs/asset-hub-westend.json")[..],
 		)?),
 
@@ -205,16 +199,14 @@ fn load_spec(id: &str) -> std::result::Result<Box<dyn ChainSpec>, String> {
 			Box::new(chain_spec::collectives::collectives_polkadot_development_config()),
 		"collectives-polkadot-local" =>
 			Box::new(chain_spec::collectives::collectives_polkadot_local_config()),
-		"collectives-polkadot" =>
-			Box::new(chain_spec::collectives::CollectivesPolkadotChainSpec::from_json_bytes(
+		"collectives-polkadot" => Box::new(GenericChainSpec::from_json_bytes(
 			&include_bytes!("../chain-specs/collectives-polkadot.json")[..],
 		)?),
 		"collectives-westend-dev" =>
 			Box::new(chain_spec::collectives::collectives_westend_development_config()),
 		"collectives-westend-local" =>
 			Box::new(chain_spec::collectives::collectives_westend_local_config()),
-		"collectives-westend" =>
-			Box::new(chain_spec::collectives::CollectivesWestendChainSpec::from_json_bytes(
+		"collectives-westend" => Box::new(GenericChainSpec::from_json_bytes(
 			&include_bytes!("../chain-specs/collectives-westend.json")[..],
 		)?),
 
@@ -224,8 +216,7 @@ fn load_spec(id: &str) -> std::result::Result<Box<dyn ChainSpec>, String> {
 		"contracts-rococo-local" =>
 			Box::new(chain_spec::contracts::contracts_rococo_local_config()),
 		"contracts-rococo-genesis" => Box::new(chain_spec::contracts::contracts_rococo_config()),
-		"contracts-rococo" =>
-			Box::new(chain_spec::contracts::ContractsRococoChainSpec::from_json_bytes(
+		"contracts-rococo" => Box::new(GenericChainSpec::from_json_bytes(
 			&include_bytes!("../chain-specs/contracts-rococo.json")[..],
 		)?),
 
@@ -279,44 +270,7 @@ fn load_spec(id: &str) -> std::result::Result<Box<dyn ChainSpec>, String> {
 		},
 
 		// -- Loading a specific spec from disk
-		path => {
-			let path: PathBuf = path.into();
-			match path.runtime() {
-				Runtime::AssetHubPolkadot => Box::new(
-					chain_spec::asset_hubs::AssetHubPolkadotChainSpec::from_json_file(path)?,
-				),
-				Runtime::AssetHubKusama =>
-					Box::new(chain_spec::asset_hubs::AssetHubKusamaChainSpec::from_json_file(path)?),
-				Runtime::AssetHubRococo =>
-					Box::new(chain_spec::asset_hubs::AssetHubRococoChainSpec::from_json_file(path)?),
-				Runtime::AssetHubWestend => Box::new(
-					chain_spec::asset_hubs::AssetHubWestendChainSpec::from_json_file(path)?,
-				),
-				Runtime::CollectivesPolkadot => Box::new(
-					chain_spec::collectives::CollectivesPolkadotChainSpec::from_json_file(path)?,
-				),
-				Runtime::CollectivesWestend => Box::new(
-					chain_spec::collectives::CollectivesWestendChainSpec::from_json_file(path)?,
-				),
-				Runtime::Shell =>
-					Box::new(chain_spec::shell::ShellChainSpec::from_json_file(path)?),
-				Runtime::Seedling =>
-					Box::new(chain_spec::seedling::SeedlingChainSpec::from_json_file(path)?),
-				Runtime::ContractsRococo =>
-					Box::new(chain_spec::contracts::ContractsRococoChainSpec::from_json_file(path)?),
-				Runtime::BridgeHub(bridge_hub_runtime_type) =>
-					bridge_hub_runtime_type.chain_spec_from_json_file(path)?,
-				Runtime::Penpal(_para_id) =>
-					Box::new(chain_spec::penpal::PenpalChainSpec::from_json_file(path)?),
-				Runtime::GluttonWestend =>
-					Box::new(chain_spec::glutton::GluttonChainSpec::from_json_file(path)?),
-				Runtime::Glutton =>
-					Box::new(chain_spec::glutton::GluttonChainSpec::from_json_file(path)?),
-				Runtime::Default => Box::new(
-					chain_spec::rococo_parachain::RococoParachainChainSpec::from_json_file(path)?,
-				),
-			}
-		},
+		path => Box::new(GenericChainSpec::from_json_file(path.into())?),
 	})
 }