Adds Snowbridge to Rococo runtime (#2522)

# Description

Adds Snowbridge to the Rococo bridge hub runtime. Includes config
changes required in Rococo asset hub.

---------

Co-authored-by: Alistair Singh <alistair.singh7@gmail.com>
Co-authored-by: ron <yrong1997@gmail.com>
Co-authored-by: Vincent Geddes <vincent.geddes@hey.com>
Co-authored-by: claravanstaden <Cats 4 life!>

cumulus/parachains/runtimes/assets/asset-hub-rococo/src/lib.rs

@@ -30,11 +30,12 @@ pub mod xcm_config;
 use assets_common::{
 	foreign_creators::ForeignCreators,
 	local_and_foreign_assets::{LocalFromLeft, TargetFromLeft},
-	matching::FromSiblingParachain,
+	matching::{FromNetwork, FromSiblingParachain},
 	AssetIdForTrustBackedAssetsConvert, MultiLocationForAssetId,
 };
 use cumulus_pallet_parachain_system::RelayNumberStrictlyIncreases;
 use cumulus_primitives_core::AggregateMessageOrigin;
+use snowbridge_rococo_common::EthereumNetwork;
 use sp_api::impl_runtime_apis;
 use sp_core::{crypto::KeyTypeId, OpaqueMetadata};
 use sp_runtime::{
@@ -379,7 +380,10 @@ impl pallet_assets::Config<ForeignAssetsInstance> for Runtime {
 	type AssetIdParameter = MultiLocationForAssetId;
 	type Currency = Balances;
 	type CreateOrigin = ForeignCreators<
-		(FromSiblingParachain<parachain_info::Pallet<Runtime>>,),
+		(
+			FromSiblingParachain<parachain_info::Pallet<Runtime>>,
+			FromNetwork<xcm_config::UniversalLocation, EthereumNetwork>,
+		),
 		ForeignCreatorsSovereignAccountOf,
 		AccountId,
 	>;
@@ -913,7 +917,6 @@ construct_runtime!(
 
 		// Bridge utilities.
 		ToWestendXcmRouter: pallet_xcm_bridge_hub_router::<Instance3>::{Pallet, Storage, Call} = 45,
-
 		// The main stage.
 		Assets: pallet_assets::<Instance1>::{Pallet, Call, Storage, Event<T>} = 50,
 		Uniques: pallet_uniques::{Pallet, Call, Storage, Event<T>} = 51,