Snowbridge on Westend (paritytech#5074)

### Context

Since Rococo is now deprecated, we need another testnet to detect
bleeding-edge changes to Substrate, Polkadot, & BEEFY consensus
protocols that could brick the bridge.

It's the mirror PR of Snowfork#157
which has reviewed by Snowbridge team internally.

Synced with @acatangiu about that in channel
https://matrix.to/#/!gxqZwOyvhLstCgPJHO:matrix.parity.io/$N0CvTfDSl3cOQLEJeZBh-wlKJUXx7EDHAuNN5HuYHY4?via=matrix.parity.io&via=parity.io&via=matrix.org

---------

Co-authored-by: Clara van Staden <claravanstaden64@gmail.com>

cumulus/parachains/integration-tests/emulated/chains/parachains/bridges/bridge-hub-westend/src/genesis.rs

@@ -23,6 +23,7 @@ use emulated_integration_tests_common::{
 use parachains_common::Balance;
 
 pub const PARA_ID: u32 = 1002;
+pub const ASSETHUB_PARA_ID: u32 = 1000;
 pub const ED: Balance = testnet_parachains_constants::westend::currency::EXISTENTIAL_DEPOSIT;
 
 pub fn genesis() -> Storage {
@@ -65,6 +66,11 @@ pub fn genesis() -> Storage {
 			owner: Some(get_account_id_from_seed::<sr25519::Public>(accounts::BOB)),
 			..Default::default()
 		},
+		ethereum_system: bridge_hub_westend_runtime::EthereumSystemConfig {
+			para_id: PARA_ID.into(),
+			asset_hub_para_id: ASSETHUB_PARA_ID.into(),
+			..Default::default()
+		},
 		..Default::default()
 	};
 

cumulus/parachains/integration-tests/emulated/tests/bridges/bridge-hub-westend/Cargo.toml

@@ -12,13 +12,17 @@ workspace = true
 
 [dependencies]
 hex-literal = { workspace = true, default-features = true }
+codec = { workspace = true }
+log = { workspace = true }
+scale-info = { workspace = true }
 
 # Substrate
 frame-support = { workspace = true }
 pallet-assets = { workspace = true }
 pallet-asset-conversion = { workspace = true }
 pallet-balances = { workspace = true }
 pallet-message-queue = { workspace = true, default-features = true }
+sp-core = { workspace = true }
 sp-runtime = { workspace = true }
 
 # Polkadot
@@ -34,3 +38,14 @@ cumulus-pallet-xcmp-queue = { workspace = true }
 emulated-integration-tests-common = { workspace = true }
 parachains-common = { workspace = true, default-features = true }
 rococo-westend-system-emulated-network = { workspace = true }
+testnet-parachains-constants = { workspace = true, features = ["westend"] }
+asset-hub-westend-runtime = { workspace = true }
+bridge-hub-westend-runtime = { workspace = true }
+
+# Snowbridge
+snowbridge-core = { workspace = true }
+snowbridge-router-primitives = { workspace = true }
+snowbridge-pallet-system = { workspace = true }
+snowbridge-pallet-outbound-queue = { workspace = true }
+snowbridge-pallet-inbound-queue = { workspace = true }
+snowbridge-pallet-inbound-queue-fixtures = { workspace = true }

cumulus/parachains/integration-tests/emulated/tests/bridges/bridge-hub-westend/src/tests/mod.rs

@@ -18,13 +18,9 @@ use crate::imports::*;
 mod asset_transfers;
 mod claim_assets;
 mod send_xcm;
+mod snowbridge;
 mod teleport;
 
-mod snowbridge {
-	pub const CHAIN_ID: u64 = 11155111;
-	pub const WETH: [u8; 20] = hex_literal::hex!("87d1f7fdfEe7f651FaBc8bFCB6E086C278b77A7d");
-}
-
 pub(crate) fn asset_hub_rococo_location() -> Location {
 	Location::new(2, [GlobalConsensus(Rococo), Parachain(AssetHubRococo::para_id().into())])
 }