Added Rococo BH <> Rococo Bulletin bridge (paritytech#2724)

* added Rococo BH <> Rococo Bulletin bridge

* init-bridge support

* allow customising finality-related runtime APIs

* revert me

* use Rococo/BridgeHubRococo pretending to be a Polkadot/BridgeHubPolkadot in Rococo <> RococoBulletin bridge

* Revert "revert me"

This reverts commit 90c598d9d50a25e7182c97eee7818bf8d4bc404c.

* Revert "allow customising finality-related runtime APIs"

This reverts commit b39c32c34acddfd0b919042122e0e667470bd0a4.

* fmt

* WITH_BRIDGE_ROCOCO_TO_BULLETIN_MESSAGES_PALLET_INDEX

* regenerate bulletin chain runtime (pallet indices have changed)

* fx WITH_BRIDGE_ROCOCO_TO_BULLETIN_MESSAGES_PALLET_INDEX constant because of latest changes

* also change indices in runtime

* fmt

* clippy

modules/beefy/src/mock.rs

@@ -163,7 +163,7 @@ pub fn validator_ids(index: u32, count: u32) -> Vec<BeefyId> {
 	validator_pairs(index, count).into_iter().map(|pair| pair.public()).collect()
 }
 
-pub fn authority_set_info(id: u64, validators: &Vec<BeefyId>) -> TestBridgedAuthoritySetInfo {
+pub fn authority_set_info(id: u64, validators: &[BeefyId]) -> TestBridgedAuthoritySetInfo {
 	let merkle_root = get_authorities_mmr_root::<TestRuntime, (), _>(validators.iter());
 
 	TestBridgedAuthoritySetInfo { id, len: validators.len() as u32, keyset_commitment: merkle_root }

primitives/chain-bridge-hub-rococo/src/lib.rs

@@ -76,6 +76,8 @@ pub const WITH_BRIDGE_HUB_ROCOCO_RELAYERS_PALLET_NAME: &str = "BridgeRelayers";
 
 /// Pallet index of `BridgeWestendMessages: pallet_bridge_messages::<Instance3>`.
 pub const WITH_BRIDGE_ROCOCO_TO_WESTEND_MESSAGES_PALLET_INDEX: u8 = 51;
+/// Pallet index of `BridgePolkadotBulletinMessages: pallet_bridge_messages::<Instance4>`.
+pub const WITH_BRIDGE_ROCOCO_TO_BULLETIN_MESSAGES_PALLET_INDEX: u8 = 61;
 
 decl_bridge_finality_runtime_apis!(bridge_hub_rococo);
 decl_bridge_messages_runtime_apis!(bridge_hub_rococo);

primitives/runtime/src/chain.rs

@@ -15,7 +15,7 @@
 // along with Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.
 
 use crate::HeaderIdProvider;
-use codec::{Decode, Encode, MaxEncodedLen};
+use codec::{Codec, Decode, Encode, MaxEncodedLen};
 use frame_support::{weights::Weight, Parameter};
 use num_traits::{AsPrimitive, Bounded, CheckedSub, Saturating, SaturatingAdd, Zero};
 use sp_runtime::{
@@ -39,7 +39,7 @@ pub enum EncodedOrDecodedCall<ChainCall> {
 	Decoded(ChainCall),
 }
 
-impl<ChainCall: Clone + Decode> EncodedOrDecodedCall<ChainCall> {
+impl<ChainCall: Clone + Codec> EncodedOrDecodedCall<ChainCall> {
 	/// Returns decoded call.
 	pub fn to_decoded(&self) -> Result<ChainCall, codec::Error> {
 		match self {
@@ -57,6 +57,14 @@ impl<ChainCall: Clone + Decode> EncodedOrDecodedCall<ChainCall> {
 			Self::Decoded(decoded_call) => Ok(decoded_call),
 		}
 	}
+
+	/// Converts self to encoded call.
+	pub fn into_encoded(self) -> Vec<u8> {
+		match self {
+			Self::Encoded(encoded_call) => encoded_call,
+			Self::Decoded(decoded_call) => decoded_call.encode(),
+		}
+	}
 }
 
 impl<ChainCall> From<ChainCall> for EncodedOrDecodedCall<ChainCall> {

relays/bin-substrate/Cargo.toml

@@ -23,11 +23,15 @@ signal-hook-async-std = "0.2.2"
 strum = { version = "0.25.0", features = ["derive"] }
 
 # Bridge dependencies
+bp-bridge-hub-polkadot = { path = "../../primitives/chain-bridge-hub-polkadot" }
+bp-bridge-hub-rococo = { path = "../../primitives/chain-bridge-hub-rococo" }
 bp-header-chain = { path = "../../primitives/header-chain" }
 bp-messages = { path = "../../primitives/messages" }
 bp-parachains = { path = "../../primitives/parachains" }
 bp-polkadot-bulletin = { path = "../../primitives/chain-polkadot-bulletin" }
+bp-polkadot = { path = "../../primitives/chain-polkadot" }
 bp-polkadot-core = { path = "../../primitives/polkadot-core" }
+bp-rococo = { path = "../../primitives/chain-rococo" }
 bp-runtime = { path = "../../primitives/runtime" }
 bridge-runtime-common = { path = "../../bin/runtime-common" }
 pallet-bridge-parachains = { path = "../../modules/parachains" }

relays/bin-substrate/src/bridges/mod.rs

@@ -18,4 +18,5 @@
 
 pub mod kusama_polkadot;
 pub mod polkadot_bulletin;
+pub mod rococo_bulletin;
 pub mod rococo_westend;

relays/bin-substrate/src/bridges/polkadot_bulletin/bridge_hub_polkadot_messages_to_polkadot_bulletin.rs

@@ -36,8 +36,8 @@ impl MessagesCliBridge for BridgeHubPolkadotToPolkadotBulletinMessagesCliBridge
 substrate_relay_helper::generate_receive_message_proof_call_builder!(
 	BridgeHubPolkadotMessagesToPolkadotBulletinMessageLane,
 	BridgeHubPolkadotMessagesToPolkadotBulletinMessageLaneReceiveMessagesProofCallBuilder,
-	relay_polkadot_bulletin_client::RuntimeCall::BridgePolkadotBridgeHubMessages,
-	relay_polkadot_bulletin_client::BridgePolkadotBridgeHubMessagesCall::receive_messages_proof
+	relay_polkadot_bulletin_client::RuntimeCall::BridgePolkadotMessages,
+	relay_polkadot_bulletin_client::BridgePolkadotMessagesCall::receive_messages_proof
 );
 
 substrate_relay_helper::generate_receive_message_delivery_proof_call_builder!(

relays/bin-substrate/src/bridges/polkadot_bulletin/polkadot_bulletin_messages_to_bridge_hub_polkadot.rs

@@ -43,8 +43,8 @@ substrate_relay_helper::generate_receive_message_proof_call_builder!(
 substrate_relay_helper::generate_receive_message_delivery_proof_call_builder!(
 	PolkadotBulletinMessagesToBridgeHubPolkadotMessageLane,
 	PolkadotBulletinMessagesToBridgeHubPolkadotMessageLaneReceiveMessagesDeliveryProofCallBuilder,
-	relay_polkadot_bulletin_client::RuntimeCall::BridgePolkadotBridgeHubMessages,
-	relay_polkadot_bulletin_client::BridgePolkadotBridgeHubMessagesCall::receive_messages_delivery_proof
+	relay_polkadot_bulletin_client::RuntimeCall::BridgePolkadotMessages,
+	relay_polkadot_bulletin_client::BridgePolkadotMessagesCall::receive_messages_delivery_proof
 );
 
 /// PolkadotBulletin-to-BridgeHubPolkadot messages lane.

relays/bin-substrate/src/bridges/rococo_bulletin/bridge_hub_rococo_messages_to_rococo_bulletin.rs

@@ -0,0 +1,65 @@
+// Copyright 2022 Parity Technologies (UK) Ltd.
+// This file is part of Parity Bridges Common.
+
+// Parity Bridges Common is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity Bridges Common is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.
+
+//! BridgeHubRococo-to-RococoBulletin messages sync entrypoint.
+
+use super::BridgeHubRococoAsBridgeHubPolkadot;
+use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge};
+use relay_polkadot_bulletin_client::PolkadotBulletin as RococoBulletin;
+use substrate_relay_helper::{messages_lane::SubstrateMessageLane, UtilityPalletBatchCallBuilder};
+
+/// BridgeHubRococo-to-RococoBulletin messages bridge.
+pub struct BridgeHubRococoToRococoBulletinMessagesCliBridge {}
+
+impl CliBridgeBase for BridgeHubRococoToRococoBulletinMessagesCliBridge {
+	type Source = BridgeHubRococoAsBridgeHubPolkadot;
+	type Target = RococoBulletin;
+}
+
+impl MessagesCliBridge for BridgeHubRococoToRococoBulletinMessagesCliBridge {
+	type MessagesLane = BridgeHubRococoMessagesToRococoBulletinMessageLane;
+}
+
+substrate_relay_helper::generate_receive_message_proof_call_builder!(
+	BridgeHubRococoMessagesToRococoBulletinMessageLane,
+	BridgeHubRococoMessagesToRococoBulletinMessageLaneReceiveMessagesProofCallBuilder,
+	relay_polkadot_bulletin_client::RuntimeCall::BridgePolkadotMessages,
+	relay_polkadot_bulletin_client::BridgePolkadotMessagesCall::receive_messages_proof
+);
+
+substrate_relay_helper::generate_receive_message_delivery_proof_call_builder!(
+	BridgeHubRococoMessagesToRococoBulletinMessageLane,
+	BridgeHubRococoMessagesToRococoBulletinMessageLaneReceiveMessagesDeliveryProofCallBuilder,
+	relay_bridge_hub_rococo_client::RuntimeCall::BridgePolkadotBulletinMessages,
+	relay_bridge_hub_rococo_client::BridgeBulletinMessagesCall::receive_messages_delivery_proof
+);
+
+/// BridgeHubRococo-to-RococoBulletin messages lane.
+#[derive(Clone, Debug)]
+pub struct BridgeHubRococoMessagesToRococoBulletinMessageLane;
+
+impl SubstrateMessageLane for BridgeHubRococoMessagesToRococoBulletinMessageLane {
+	type SourceChain = BridgeHubRococoAsBridgeHubPolkadot;
+	type TargetChain = RococoBulletin;
+
+	type ReceiveMessagesProofCallBuilder =
+		BridgeHubRococoMessagesToRococoBulletinMessageLaneReceiveMessagesProofCallBuilder;
+	type ReceiveMessagesDeliveryProofCallBuilder =
+		BridgeHubRococoMessagesToRococoBulletinMessageLaneReceiveMessagesDeliveryProofCallBuilder;
+
+	type SourceBatchCallBuilder = UtilityPalletBatchCallBuilder<BridgeHubRococoAsBridgeHubPolkadot>;
+	type TargetBatchCallBuilder = ();
+}