Snowbridge Ethereum Deneb fork preparation (#3029)

- Prepares for the Deneb hardfork on Sepolia testnet on 31 January
(needs to be deployed to Rococo before then)
- Removes `beacon-minimal-spec` flag for simpler config
- Adds test comments

---------

Co-authored-by: Ron <yrong1997@gmail.com>
Co-authored-by: claravanstaden <Cats 4 life!>
Co-authored-by: Alistair Singh <alistair.singh7@gmail.com>

cumulus/parachains/runtimes/bridge-hubs/bridge-hub-rococo/tests/snowbridge.rs

@@ -16,16 +16,25 @@
 
 #![cfg(test)]
 
+use bp_polkadot_core::Signature;
 use bridge_hub_rococo_runtime::{
-	xcm_config::XcmConfig, MessageQueueServiceWeight, Runtime, RuntimeEvent, SessionKeys,
+	bridge_to_bulletin_config::OnBridgeHubRococoRefundRococoBulletinMessages,
+	bridge_to_westend_config::OnBridgeHubRococoRefundBridgeHubWestendMessages,
+	xcm_config::XcmConfig, BridgeRejectObsoleteHeadersAndMessages, Executive,
+	MessageQueueServiceWeight, Runtime, RuntimeCall, RuntimeEvent, SessionKeys, SignedExtra,
+	UncheckedExtrinsic,
 };
-use codec::Decode;
+use codec::{Decode, Encode};
 use cumulus_primitives_core::XcmError::{FailedToTransactAsset, NotHoldingFees};
 use frame_support::parameter_types;
 use parachains_common::{AccountId, AuraId, Balance};
 use snowbridge_pallet_ethereum_client::WeightInfo;
 use sp_core::H160;
 use sp_keyring::AccountKeyring::Alice;
+use sp_runtime::{
+	generic::{Era, SignedPayload},
+	AccountId32,
+};
 
 parameter_types! {
 		pub const DefaultBridgeHubEthereumBaseFee: Balance = 2_750_872_500_000;
@@ -107,3 +116,62 @@ fn max_message_queue_service_weight_is_more_than_beacon_extrinsic_weights() {
 	max_message_queue_weight.all_gt(force_checkpoint);
 	max_message_queue_weight.all_gt(submit_checkpoint);
 }
+
+#[test]
+fn ethereum_client_consensus_extrinsics_work() {
+	snowbridge_runtime_test_common::ethereum_extrinsic(
+		collator_session_keys(),
+		1013,
+		construct_and_apply_extrinsic,
+	);
+}
+
+#[test]
+fn ethereum_to_polkadot_message_extrinsics_work() {
+	snowbridge_runtime_test_common::ethereum_to_polkadot_message_extrinsics_work(
+		collator_session_keys(),
+		1013,
+		construct_and_apply_extrinsic,
+	);
+}
+
+fn construct_extrinsic(
+	sender: sp_keyring::AccountKeyring,
+	call: RuntimeCall,
+) -> UncheckedExtrinsic {
+	let account_id = AccountId32::from(sender.public());
+	let extra: SignedExtra = (
+		frame_system::CheckNonZeroSender::<Runtime>::new(),
+		frame_system::CheckSpecVersion::<Runtime>::new(),
+		frame_system::CheckTxVersion::<Runtime>::new(),
+		frame_system::CheckGenesis::<Runtime>::new(),
+		frame_system::CheckEra::<Runtime>::from(Era::immortal()),
+		frame_system::CheckNonce::<Runtime>::from(
+			frame_system::Pallet::<Runtime>::account(&account_id).nonce,
+		),
+		frame_system::CheckWeight::<Runtime>::new(),
+		pallet_transaction_payment::ChargeTransactionPayment::<Runtime>::from(0),
+		BridgeRejectObsoleteHeadersAndMessages::default(),
+		(
+			OnBridgeHubRococoRefundBridgeHubWestendMessages::default(),
+			OnBridgeHubRococoRefundRococoBulletinMessages::default(),
+		),
+	);
+	let payload = SignedPayload::new(call.clone(), extra.clone()).unwrap();
+	let signature = payload.using_encoded(|e| sender.sign(e));
+	UncheckedExtrinsic::new_signed(
+		call,
+		account_id.into(),
+		Signature::Sr25519(signature.clone()),
+		extra,
+	)
+}
+
+fn construct_and_apply_extrinsic(
+	origin: sp_keyring::AccountKeyring,
+	call: RuntimeCall,
+) -> sp_runtime::DispatchOutcome {
+	let xt = construct_extrinsic(origin, call);
+	let r = Executive::apply_extrinsic(xt);
+	r.unwrap()
+}