adds rococo runtime common crate (#1031)

Co-authored-by: claravanstaden <Cats 4 life!>

parachain/Cargo.toml

@@ -13,6 +13,7 @@ members = [
     "pallets/system",
     "pallets/system/runtime-api",
     "runtime/runtime-common",
+    "runtime/rococo-common",
 ]
 
 [patch.'https://github.com/snowfork/snowbridge']

parachain/runtime/rococo-common/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "snowbridge-rococo-common"
+version = "0.0.1"
+authors = [ "Snowfork <contact@snowfork.com>" ]
+edition = "2021"
+
+[dependencies]
+log = { version = "0.4.20", default-features = false }
+
+frame-support = { path = "../../../polkadot-sdk/substrate/frame/support", default-features = false }
+xcm = { package = "staging-xcm", path = "../../../polkadot-sdk/polkadot/xcm", default-features = false }
+
+[dev-dependencies]
+
+[features]
+default = [ "std" ]
+std = [
+    "frame-support/std",
+    "xcm/std",
+]
+runtime-benchmarks = []

parachain/runtime/rococo-common/src/lib.rs

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2023 Snowfork <hello@snowfork.com>
+//! # Rococo Common
+//!
+//! Config used for the Rococo asset hub and bridge hub runtimes.
+#![cfg_attr(not(feature = "std"), no_std)]
+
+use frame_support::parameter_types;
+use xcm::opaque::lts::NetworkId;
+
+parameter_types! {
+	// Network and location for the Ethereum chain.
+	pub EthereumNetwork: NetworkId = NetworkId::Ethereum { chain_id: 15 };
+}