Merge bulletin chain changes into polkadot staging (#2574)

* polkadot-staging for v1.0.0

* Add polkadot bulletin chain primitives (#2542)

* add polkadot bulletin chain primitives

* also impl ChainWithMessages

* clippy

* instead of requiring sp_std::vec::Vec import when using runtime API generation macro, let's use full type path directly in macro (#2551)

* Polkadot Bulletin Chain client (#2552)

* relay-polkadot-bulletin-client

* generate Polkadot Bulletin Chain Runtime

* Add relays that will be used in Polkadot Bulletin <> Polkadot.BH bridge (#2556)

* added Polkadot.BH <> Polkadot Bulletin chain relays

* uncommented ED stuff

* complex PolkadotBulletin <> Polkadot.BH relay

* removed TODO

* spelling

* prepare refund extension infra to add refund extension for messages from standalone chain (#2558)

* prepare refund extension infra to add refund extension for messages from standalone chain

* spelling

* apply adapter to fix compilation

* clippy

* added POLKADOT_BULLETIN_CHAIN_ID constant

* RefundBridgedGrandpaMessages to refund transaction costs for messages coming to/from bridged standalone/relay chain (#2566)

* RefundBridgedGrandpaMessages to refund transaction costs for messages coming to/from bridged standalone/relay chain

* clippy

* fix compilation

* fix codec dependency (#2567)

* Support message relay limits override (#2570)

* support message relay limits overrides for bridges

* spelling

* export EXTRA_STORAGE_PROOF_SIZE for Polkadot Bulletin (#2572)

bridges/relays/bin-substrate/Cargo.toml

@@ -26,6 +26,7 @@ bp-header-chain = { path = "../../primitives/header-chain" }
 bp-messages = { path = "../../primitives/messages" }
 bp-parachains = { path = "../../primitives/parachains" }
 bp-millau = { path = "../../primitives/chain-millau" }
+bp-polkadot-bulletin = { path = "../../primitives/chain-polkadot-bulletin" }
 bp-polkadot-core = { path = "../../primitives/polkadot-core" }
 bp-rialto = { path = "../../primitives/chain-rialto" }
 bp-rialto-parachain = { path = "../../primitives/chain-rialto-parachain" }
@@ -43,6 +44,7 @@ relay-bridge-hub-rococo-client = { path = "../client-bridge-hub-rococo" }
 relay-bridge-hub-wococo-client = { path = "../client-bridge-hub-wococo" }
 relay-kusama-client = { path = "../client-kusama" }
 relay-polkadot-client = { path = "../client-polkadot" }
+relay-polkadot-bulletin-client = { path = "../client-polkadot-bulletin" }
 relay-rococo-client = { path = "../client-rococo" }
 relay-substrate-client = { path = "../client-substrate" }
 relay-utils = { path = "../utils" }

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

@@ -17,6 +17,7 @@
 //! Declaration of all bridges that the relay is able to serve.
 
 pub mod kusama_polkadot;
+pub mod polkadot_bulletin;
 pub mod rialto_millau;
 pub mod rialto_parachain_millau;
 pub mod rococo_wococo;

bridges/relays/bin-substrate/src/bridges/polkadot_bulletin/bridge_hub_polkadot_messages_to_polkadot_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/>.
+
+//! BridgeHubPolkadot-to-PolkadotBulletin messages sync entrypoint.
+
+use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge};
+use relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
+use relay_polkadot_bulletin_client::PolkadotBulletin;
+use substrate_relay_helper::{messages_lane::SubstrateMessageLane, UtilityPalletBatchCallBuilder};
+
+/// BridgeHubPolkadot-to-PolkadotBulletin messages bridge.
+pub struct BridgeHubPolkadotToPolkadotBulletinMessagesCliBridge {}
+
+impl CliBridgeBase for BridgeHubPolkadotToPolkadotBulletinMessagesCliBridge {
+	type Source = BridgeHubPolkadot;
+	type Target = PolkadotBulletin;
+}
+
+impl MessagesCliBridge for BridgeHubPolkadotToPolkadotBulletinMessagesCliBridge {
+	type MessagesLane = BridgeHubPolkadotMessagesToPolkadotBulletinMessageLane;
+}
+
+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
+);
+
+substrate_relay_helper::generate_receive_message_delivery_proof_call_builder!(
+	BridgeHubPolkadotMessagesToPolkadotBulletinMessageLane,
+	BridgeHubPolkadotMessagesToPolkadotBulletinMessageLaneReceiveMessagesDeliveryProofCallBuilder,
+	relay_bridge_hub_polkadot_client::runtime::Call::BridgePolkadotBulletinMessages,
+	relay_bridge_hub_polkadot_client::runtime::BridgePolkadotBulletinMessagesCall::receive_messages_delivery_proof
+);
+
+/// BridgeHubPolkadot-to-PolkadotBulletin messages lane.
+#[derive(Clone, Debug)]
+pub struct BridgeHubPolkadotMessagesToPolkadotBulletinMessageLane;
+
+impl SubstrateMessageLane for BridgeHubPolkadotMessagesToPolkadotBulletinMessageLane {
+	type SourceChain = BridgeHubPolkadot;
+	type TargetChain = PolkadotBulletin;
+
+	type ReceiveMessagesProofCallBuilder =
+		BridgeHubPolkadotMessagesToPolkadotBulletinMessageLaneReceiveMessagesProofCallBuilder;
+	type ReceiveMessagesDeliveryProofCallBuilder =
+		BridgeHubPolkadotMessagesToPolkadotBulletinMessageLaneReceiveMessagesDeliveryProofCallBuilder;
+
+	type SourceBatchCallBuilder = UtilityPalletBatchCallBuilder<BridgeHubPolkadot>;
+	type TargetBatchCallBuilder = ();
+}

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

@@ -0,0 +1,23 @@
+// Copyright 2019-2021 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/>.
+
+//! Declaration of all bridges between Polkadot Bulletin Chain and Polkadot Bridge Hub.
+
+pub mod bridge_hub_polkadot_messages_to_polkadot_bulletin;
+pub mod polkadot_bulletin_headers_to_bridge_hub_polkadot;
+pub mod polkadot_bulletin_messages_to_bridge_hub_polkadot;
+pub mod polkadot_headers_to_polkadot_bulletin;
+pub mod polkadot_parachains_to_polkadot_bulletin;

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

@@ -0,0 +1,101 @@
+// 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/>.
+
+//! PolkadotBulletin-to-BridgeHubPolkadot headers sync entrypoint.
+
+use crate::cli::bridge::{
+	CliBridgeBase, MessagesCliBridge, RelayToRelayEquivocationDetectionCliBridge,
+	RelayToRelayHeadersCliBridge,
+};
+
+use async_trait::async_trait;
+use relay_substrate_client::{AccountKeyPairOf, Client};
+use substrate_relay_helper::{
+	equivocation::SubstrateEquivocationDetectionPipeline,
+	finality::SubstrateFinalitySyncPipeline,
+	finality_base::{engine::Grandpa as GrandpaFinalityEngine, SubstrateFinalityPipeline},
+	TransactionParams,
+};
+
+/// Description of `PolkadotBulletin` -> `PolkadotBridgeHub` finalized headers bridge.
+#[derive(Clone, Debug)]
+pub struct PolkadotBulletinFinalityToBridgeHubPolkadot;
+
+substrate_relay_helper::generate_submit_finality_proof_call_builder!(
+	PolkadotBulletinFinalityToBridgeHubPolkadot,
+	SubmitFinalityProofCallBuilder,
+	relay_bridge_hub_polkadot_client::runtime::Call::BridgePolkadotBulletinGrandpa,
+	relay_bridge_hub_polkadot_client::runtime::BridgePolkadotBulletinGrandpaCall::submit_finality_proof
+);
+
+substrate_relay_helper::generate_report_equivocation_call_builder!(
+	PolkadotBulletinFinalityToBridgeHubPolkadot,
+	ReportEquivocationCallBuilder,
+	relay_polkadot_bulletin_client::RuntimeCall::Grandpa,
+	relay_polkadot_bulletin_client::GrandpaCall::report_equivocation
+);
+
+#[async_trait]
+impl SubstrateFinalityPipeline for PolkadotBulletinFinalityToBridgeHubPolkadot {
+	type SourceChain = relay_polkadot_bulletin_client::PolkadotBulletin;
+	type TargetChain = relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
+
+	type FinalityEngine = GrandpaFinalityEngine<Self::SourceChain>;
+}
+
+#[async_trait]
+impl SubstrateFinalitySyncPipeline for PolkadotBulletinFinalityToBridgeHubPolkadot {
+	type SubmitFinalityProofCallBuilder = SubmitFinalityProofCallBuilder;
+
+	async fn start_relay_guards(
+		target_client: &Client<Self::TargetChain>,
+		_transaction_params: &TransactionParams<AccountKeyPairOf<Self::TargetChain>>,
+		enable_version_guard: bool,
+	) -> relay_substrate_client::Result<()> {
+		if enable_version_guard {
+			relay_substrate_client::guard::abort_on_spec_version_change(
+				target_client.clone(),
+				target_client.simple_runtime_version().await?.spec_version,
+			);
+		}
+		Ok(())
+	}
+}
+
+#[async_trait]
+impl SubstrateEquivocationDetectionPipeline for PolkadotBulletinFinalityToBridgeHubPolkadot {
+	type ReportEquivocationCallBuilder = ReportEquivocationCallBuilder;
+}
+
+/// `PolkadotBulletin` to BridgeHub `Polkadot` bridge definition.
+pub struct PolkadotBulletinToBridgeHubPolkadotCliBridge {}
+
+impl CliBridgeBase for PolkadotBulletinToBridgeHubPolkadotCliBridge {
+	type Source = relay_polkadot_bulletin_client::PolkadotBulletin;
+	type Target = relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
+}
+
+impl RelayToRelayHeadersCliBridge for PolkadotBulletinToBridgeHubPolkadotCliBridge {
+	type Finality = PolkadotBulletinFinalityToBridgeHubPolkadot;
+}
+
+impl RelayToRelayEquivocationDetectionCliBridge for PolkadotBulletinToBridgeHubPolkadotCliBridge {
+	type Equivocation = PolkadotBulletinFinalityToBridgeHubPolkadot;
+}
+
+impl MessagesCliBridge for PolkadotBulletinToBridgeHubPolkadotCliBridge {
+	type MessagesLane = crate::bridges::polkadot_bulletin::polkadot_bulletin_messages_to_bridge_hub_polkadot::PolkadotBulletinMessagesToBridgeHubPolkadotMessageLane;
+}

bridges/relays/bin-substrate/src/bridges/polkadot_bulletin/polkadot_bulletin_messages_to_bridge_hub_polkadot.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/>.
+
+//! PolkadotBulletin-to-BridgeHubPolkadot messages sync entrypoint.
+
+use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge};
+use relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
+use relay_polkadot_bulletin_client::PolkadotBulletin;
+use substrate_relay_helper::{messages_lane::SubstrateMessageLane, UtilityPalletBatchCallBuilder};
+
+/// PolkadotBulletin-to-BridgeHubPolkadot messages bridge.
+pub struct PolkadotBulletinToBridgeHubPolkadotMessagesCliBridge {}
+
+impl CliBridgeBase for PolkadotBulletinToBridgeHubPolkadotMessagesCliBridge {
+	type Source = PolkadotBulletin;
+	type Target = BridgeHubPolkadot;
+}
+
+impl MessagesCliBridge for PolkadotBulletinToBridgeHubPolkadotMessagesCliBridge {
+	type MessagesLane = PolkadotBulletinMessagesToBridgeHubPolkadotMessageLane;
+}
+
+substrate_relay_helper::generate_receive_message_proof_call_builder!(
+	PolkadotBulletinMessagesToBridgeHubPolkadotMessageLane,
+	PolkadotBulletinMessagesToBridgeHubPolkadotMessageLaneReceiveMessagesProofCallBuilder,
+	relay_bridge_hub_polkadot_client::runtime::Call::BridgePolkadotBulletinMessages,
+	relay_bridge_hub_polkadot_client::runtime::BridgePolkadotBulletinMessagesCall::receive_messages_proof
+);
+
+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
+);
+
+/// PolkadotBulletin-to-BridgeHubPolkadot messages lane.
+#[derive(Clone, Debug)]
+pub struct PolkadotBulletinMessagesToBridgeHubPolkadotMessageLane;
+
+impl SubstrateMessageLane for PolkadotBulletinMessagesToBridgeHubPolkadotMessageLane {
+	type SourceChain = PolkadotBulletin;
+	type TargetChain = BridgeHubPolkadot;
+
+	type ReceiveMessagesProofCallBuilder =
+		PolkadotBulletinMessagesToBridgeHubPolkadotMessageLaneReceiveMessagesProofCallBuilder;
+	type ReceiveMessagesDeliveryProofCallBuilder =
+		PolkadotBulletinMessagesToBridgeHubPolkadotMessageLaneReceiveMessagesDeliveryProofCallBuilder;
+
+	type SourceBatchCallBuilder = ();
+	type TargetBatchCallBuilder = UtilityPalletBatchCallBuilder<BridgeHubPolkadot>;
+}

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

@@ -0,0 +1,96 @@
+// 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/>.
+
+//! Polkadot-to-PolkadotBulletin headers sync entrypoint.
+
+use crate::cli::bridge::{
+	CliBridgeBase, RelayToRelayEquivocationDetectionCliBridge, RelayToRelayHeadersCliBridge,
+};
+
+use async_trait::async_trait;
+use relay_substrate_client::{AccountKeyPairOf, Client};
+use substrate_relay_helper::{
+	equivocation::SubstrateEquivocationDetectionPipeline,
+	finality::SubstrateFinalitySyncPipeline,
+	finality_base::{engine::Grandpa as GrandpaFinalityEngine, SubstrateFinalityPipeline},
+	TransactionParams,
+};
+
+/// Description of Polkadot -> `PolkadotBulletin` finalized headers bridge.
+#[derive(Clone, Debug)]
+pub struct PolkadotFinalityToPolkadotBulletin;
+
+substrate_relay_helper::generate_submit_finality_proof_call_builder!(
+	PolkadotFinalityToPolkadotBulletin,
+	SubmitFinalityProofCallBuilder,
+	relay_polkadot_bulletin_client::RuntimeCall::BridgePolkadotGrandpa,
+	relay_polkadot_bulletin_client::BridgePolkadotGrandpaCall::submit_finality_proof
+);
+
+substrate_relay_helper::generate_report_equivocation_call_builder!(
+	PolkadotFinalityToPolkadotBulletin,
+	ReportEquivocationCallBuilder,
+	relay_polkadot_client::RuntimeCall::Grandpa,
+	relay_polkadot_client::GrandpaCall::report_equivocation
+);
+
+#[async_trait]
+impl SubstrateFinalityPipeline for PolkadotFinalityToPolkadotBulletin {
+	type SourceChain = relay_polkadot_client::Polkadot;
+	type TargetChain = relay_polkadot_bulletin_client::PolkadotBulletin;
+
+	type FinalityEngine = GrandpaFinalityEngine<Self::SourceChain>;
+}
+
+#[async_trait]
+impl SubstrateFinalitySyncPipeline for PolkadotFinalityToPolkadotBulletin {
+	type SubmitFinalityProofCallBuilder = SubmitFinalityProofCallBuilder;
+
+	async fn start_relay_guards(
+		target_client: &Client<Self::TargetChain>,
+		_transaction_params: &TransactionParams<AccountKeyPairOf<Self::TargetChain>>,
+		enable_version_guard: bool,
+	) -> relay_substrate_client::Result<()> {
+		if enable_version_guard {
+			relay_substrate_client::guard::abort_on_spec_version_change(
+				target_client.clone(),
+				target_client.simple_runtime_version().await?.spec_version,
+			);
+		}
+		Ok(())
+	}
+}
+
+#[async_trait]
+impl SubstrateEquivocationDetectionPipeline for PolkadotFinalityToPolkadotBulletin {
+	type ReportEquivocationCallBuilder = ReportEquivocationCallBuilder;
+}
+
+/// `Polkadot` to BridgeHub `PolkadotBulletin` bridge definition.
+pub struct PolkadotToPolkadotBulletinCliBridge {}
+
+impl CliBridgeBase for PolkadotToPolkadotBulletinCliBridge {
+	type Source = relay_polkadot_client::Polkadot;
+	type Target = relay_polkadot_bulletin_client::PolkadotBulletin;
+}
+
+impl RelayToRelayHeadersCliBridge for PolkadotToPolkadotBulletinCliBridge {
+	type Finality = PolkadotFinalityToPolkadotBulletin;
+}
+
+impl RelayToRelayEquivocationDetectionCliBridge for PolkadotToPolkadotBulletinCliBridge {
+	type Equivocation = PolkadotFinalityToPolkadotBulletin;
+}

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

@@ -0,0 +1,92 @@
+// Copyright 2019-2021 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/>.
+
+//! Polkadot-to-PolkadotBulletin parachains sync entrypoint.
+
+use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge};
+
+use bp_polkadot_core::parachains::{ParaHash, ParaHeadsProof, ParaId};
+use bp_runtime::Chain;
+use relay_substrate_client::{CallOf, HeaderIdOf};
+use substrate_relay_helper::{
+	messages_lane::MessagesRelayLimits,
+	parachains::{SubmitParachainHeadsCallBuilder, SubstrateParachainsPipeline},
+};
+
+/// Polkadot-to-PolkadotBulletin parachain sync description.
+#[derive(Clone, Debug)]
+pub struct PolkadotToPolkadotBulletin;
+
+impl SubstrateParachainsPipeline for PolkadotToPolkadotBulletin {
+	type SourceParachain = relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
+	type SourceRelayChain = relay_polkadot_client::Polkadot;
+	type TargetChain = relay_polkadot_bulletin_client::PolkadotBulletin;
+
+	type SubmitParachainHeadsCallBuilder = PolkadotToPolkadotBulletinCallBuilder;
+}
+
+pub struct PolkadotToPolkadotBulletinCallBuilder;
+impl SubmitParachainHeadsCallBuilder<PolkadotToPolkadotBulletin>
+	for PolkadotToPolkadotBulletinCallBuilder
+{
+	fn build_submit_parachain_heads_call(
+		at_relay_block: HeaderIdOf<relay_polkadot_client::Polkadot>,
+		parachains: Vec<(ParaId, ParaHash)>,
+		parachain_heads_proof: ParaHeadsProof,
+	) -> CallOf<relay_polkadot_bulletin_client::PolkadotBulletin> {
+		relay_polkadot_bulletin_client::RuntimeCall::BridgePolkadotParachains(
+			relay_polkadot_bulletin_client::BridgePolkadotParachainsCall::submit_parachain_heads {
+				at_relay_block: (at_relay_block.0, at_relay_block.1),
+				parachains,
+				parachain_heads_proof,
+			},
+		)
+	}
+}
+
+/// Polkadot-to-PolkadotBulletin parachain sync description for the CLI.
+pub struct PolkadotToPolkadotBulletinCliBridge {}
+
+impl ParachainToRelayHeadersCliBridge for PolkadotToPolkadotBulletinCliBridge {
+	type SourceRelay = relay_polkadot_client::Polkadot;
+	type ParachainFinality = PolkadotToPolkadotBulletin;
+	type RelayFinality =
+		crate::bridges::polkadot_bulletin::polkadot_headers_to_polkadot_bulletin::PolkadotFinalityToPolkadotBulletin;
+}
+
+impl CliBridgeBase for PolkadotToPolkadotBulletinCliBridge {
+	type Source = relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
+	type Target = relay_polkadot_bulletin_client::PolkadotBulletin;
+}
+
+impl MessagesCliBridge for PolkadotToPolkadotBulletinCliBridge {
+	type MessagesLane =
+		crate::bridges::polkadot_bulletin::bridge_hub_polkadot_messages_to_polkadot_bulletin::BridgeHubPolkadotMessagesToPolkadotBulletinMessageLane;
+
+	fn maybe_messages_limits() -> Option<MessagesRelayLimits> {
+		// Polkadot Bulletin chain is missing the `TransactionPayment` runtime API (as well as the
+		// transaction payment pallet itself), so we can't estimate limits using runtime calls.
+		// Let's do it here.
+		//
+		// Folloiung constants are just safe **underestimations**. Normally, we are able to deliver
+		// and dispatch thousands of messages in the same transaction.
+		Some(MessagesRelayLimits {
+			max_messages_in_single_batch: 128,
+			max_messages_weight_in_single_batch:
+				bp_polkadot_bulletin::PolkadotBulletin::max_extrinsic_weight() / 20,
+		})
+	}
+}

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

@@ -19,6 +19,7 @@
 mod kusama;
 mod millau;
 mod polkadot;
+mod polkadot_bulletin;
 mod rialto;
 mod rialto_parachain;
 mod rococo;

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

@@ -0,0 +1,26 @@
+// 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/>.
+
+//! Polkadot + Polkadot parachains specification for CLI.
+
+use crate::cli::CliChain;
+use relay_polkadot_bulletin_client::PolkadotBulletin;
+use relay_substrate_client::SimpleRuntimeVersion;
+
+impl CliChain for PolkadotBulletin {
+	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
+		Some(SimpleRuntimeVersion { spec_version: 100, transaction_version: 1 });
+}

bridges/relays/bin-substrate/src/cli/bridge.rs

@@ -19,8 +19,10 @@ use pallet_bridge_parachains::{RelayBlockHash, RelayBlockHasher, RelayBlockNumbe
 use relay_substrate_client::{Chain, ChainWithTransactions, Parachain, RelayChain};
 use strum::{EnumString, EnumVariantNames};
 use substrate_relay_helper::{
-	equivocation::SubstrateEquivocationDetectionPipeline, finality::SubstrateFinalitySyncPipeline,
-	messages_lane::SubstrateMessageLane, parachains::SubstrateParachainsPipeline,
+	equivocation::SubstrateEquivocationDetectionPipeline,
+	finality::SubstrateFinalitySyncPipeline,
+	messages_lane::{MessagesRelayLimits, SubstrateMessageLane},
+	parachains::SubstrateParachainsPipeline,
 };
 
 #[derive(Debug, PartialEq, Eq, EnumString, EnumVariantNames)]
@@ -35,6 +37,8 @@ pub enum FullBridge {
 	BridgeHubWococoToBridgeHubRococo,
 	BridgeHubKusamaToBridgeHubPolkadot,
 	BridgeHubPolkadotToBridgeHubKusama,
+	PolkadotBulletinToBridgeHubPolkadot,
+	BridgeHubPolkadotToPolkadotBulletin,
 }
 
 /// Minimal bridge representation that can be used from the CLI.
@@ -109,4 +113,11 @@ where
 pub trait MessagesCliBridge: CliBridgeBase {
 	/// The Source -> Destination messages synchronization pipeline.
 	type MessagesLane: SubstrateMessageLane<SourceChain = Self::Source, TargetChain = Self::Target>;
+
+	/// Optional messages delivery transaction limits that the messages relay is going
+	/// to use. If it returns `None`, limits are estimated using `TransactionPayment` API
+	/// at the target chain.
+	fn maybe_messages_limits() -> Option<MessagesRelayLimits> {
+		None
+	}
 }

bridges/relays/bin-substrate/src/cli/init_bridge.rs

@@ -23,6 +23,10 @@ use crate::{
 			kusama_headers_to_bridge_hub_polkadot::KusamaToBridgeHubPolkadotCliBridge,
 			polkadot_headers_to_bridge_hub_kusama::PolkadotToBridgeHubKusamaCliBridge,
 		},
+		polkadot_bulletin::{
+			polkadot_bulletin_headers_to_bridge_hub_polkadot::PolkadotBulletinToBridgeHubPolkadotCliBridge,
+			polkadot_headers_to_polkadot_bulletin::PolkadotToPolkadotBulletinCliBridge,
+		},
 		rialto_millau::{
 			millau_headers_to_rialto::MillauToRialtoCliBridge,
 			rialto_headers_to_millau::RialtoToMillauCliBridge,
@@ -72,6 +76,8 @@ pub enum InitBridgeName {
 	WococoToBridgeHubRococo,
 	KusamaToBridgeHubPolkadot,
 	PolkadotToBridgeHubKusama,
+	PolkadotToPolkadotBulletin,
+	PolkadotBulletinToBridgeHubPolkadot,
 }
 
 #[async_trait]
@@ -232,6 +238,37 @@ impl BridgeInitializer for PolkadotToBridgeHubKusamaCliBridge {
 	}
 }
 
+impl BridgeInitializer for PolkadotToPolkadotBulletinCliBridge {
+	type Engine = GrandpaFinalityEngine<Self::Source>;
+
+	fn encode_init_bridge(
+		init_data: <Self::Engine as Engine<Self::Source>>::InitializationData,
+	) -> <Self::Target as Chain>::Call {
+		type RuntimeCall = relay_polkadot_bulletin_client::RuntimeCall;
+		type BridgePolkadotGrandpaCall = relay_polkadot_bulletin_client::BridgePolkadotGrandpaCall;
+		type SudoCall = relay_polkadot_bulletin_client::SudoCall;
+
+		let initialize_call =
+			RuntimeCall::BridgePolkadotGrandpa(BridgePolkadotGrandpaCall::initialize { init_data });
+
+		RuntimeCall::Sudo(SudoCall::sudo { call: Box::new(initialize_call) })
+	}
+}
+
+impl BridgeInitializer for PolkadotBulletinToBridgeHubPolkadotCliBridge {
+	type Engine = GrandpaFinalityEngine<Self::Source>;
+
+	fn encode_init_bridge(
+		init_data: <Self::Engine as Engine<Self::Source>>::InitializationData,
+	) -> <Self::Target as Chain>::Call {
+		relay_bridge_hub_polkadot_client::runtime::Call::BridgePolkadotBulletinGrandpa(
+			relay_bridge_hub_polkadot_client::runtime::BridgePolkadotBulletinGrandpaCall::initialize {
+				init_data,
+			},
+		)
+	}
+}
+
 impl InitBridge {
 	/// Run the command.
 	pub async fn run(self) -> anyhow::Result<()> {
@@ -249,6 +286,10 @@ impl InitBridge {
 				KusamaToBridgeHubPolkadotCliBridge::init_bridge(self),
 			InitBridgeName::PolkadotToBridgeHubKusama =>
 				PolkadotToBridgeHubKusamaCliBridge::init_bridge(self),
+			InitBridgeName::PolkadotToPolkadotBulletin =>
+				PolkadotToPolkadotBulletinCliBridge::init_bridge(self),
+			InitBridgeName::PolkadotBulletinToBridgeHubPolkadot =>
+				PolkadotBulletinToBridgeHubPolkadotCliBridge::init_bridge(self),
 		}
 		.await
 	}

bridges/relays/bin-substrate/src/cli/relay_headers.rs

@@ -23,6 +23,10 @@ use crate::bridges::{
 		kusama_headers_to_bridge_hub_polkadot::KusamaToBridgeHubPolkadotCliBridge,
 		polkadot_headers_to_bridge_hub_kusama::PolkadotToBridgeHubKusamaCliBridge,
 	},
+	polkadot_bulletin::{
+		polkadot_bulletin_headers_to_bridge_hub_polkadot::PolkadotBulletinToBridgeHubPolkadotCliBridge,
+		polkadot_headers_to_polkadot_bulletin::PolkadotToPolkadotBulletinCliBridge,
+	},
 	rialto_millau::{
 		millau_headers_to_rialto::MillauToRialtoCliBridge,
 		rialto_headers_to_millau::RialtoToMillauCliBridge,
@@ -71,6 +75,8 @@ pub enum RelayHeadersBridge {
 	WococoToBridgeHubRococo,
 	KusamaToBridgeHubPolkadot,
 	PolkadotToBridgeHubKusama,
+	PolkadotToPolkadotBulletin,
+	PolkadotBulletinToBridgeHubPolkadot,
 }
 
 #[async_trait]
@@ -116,6 +122,8 @@ impl HeadersRelayer for RococoToBridgeHubWococoCliBridge {}
 impl HeadersRelayer for WococoToBridgeHubRococoCliBridge {}
 impl HeadersRelayer for KusamaToBridgeHubPolkadotCliBridge {}
 impl HeadersRelayer for PolkadotToBridgeHubKusamaCliBridge {}
+impl HeadersRelayer for PolkadotToPolkadotBulletinCliBridge {}
+impl HeadersRelayer for PolkadotBulletinToBridgeHubPolkadotCliBridge {}
 
 impl RelayHeaders {
 	/// Run the command.
@@ -134,6 +142,10 @@ impl RelayHeaders {
 				KusamaToBridgeHubPolkadotCliBridge::relay_headers(self),
 			RelayHeadersBridge::PolkadotToBridgeHubKusama =>
 				PolkadotToBridgeHubKusamaCliBridge::relay_headers(self),
+			RelayHeadersBridge::PolkadotToPolkadotBulletin =>
+				PolkadotToPolkadotBulletinCliBridge::relay_headers(self),
+			RelayHeadersBridge::PolkadotBulletinToBridgeHubPolkadot =>
+				PolkadotBulletinToBridgeHubPolkadotCliBridge::relay_headers(self),
 		}
 		.await
 	}

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

@@ -44,6 +44,10 @@ use crate::{
 			kusama_parachains_to_bridge_hub_polkadot::BridgeHubKusamaToBridgeHubPolkadotCliBridge,
 			polkadot_parachains_to_bridge_hub_kusama::BridgeHubPolkadotToBridgeHubKusamaCliBridge,
 		},
+		polkadot_bulletin::{
+			polkadot_bulletin_headers_to_bridge_hub_polkadot::PolkadotBulletinToBridgeHubPolkadotCliBridge,
+			polkadot_parachains_to_polkadot_bulletin::PolkadotToPolkadotBulletinCliBridge,
+		},
 		rialto_millau::{
 			millau_headers_to_rialto::MillauToRialtoCliBridge,
 			rialto_headers_to_millau::RialtoToMillauCliBridge,
@@ -77,7 +81,9 @@ use relay_substrate_client::{
 use relay_utils::metrics::MetricsParams;
 use sp_core::Pair;
 use substrate_relay_helper::{
-	messages_lane::MessagesRelayParams, on_demand::OnDemandRelay, TaggedAccount, TransactionParams,
+	messages_lane::{MessagesRelayLimits, MessagesRelayParams},
+	on_demand::OnDemandRelay,
+	TaggedAccount, TransactionParams,
 };
 
 /// Parameters that have the same names across all bridges.
@@ -176,6 +182,7 @@ where
 		source_to_target_headers_relay: Arc<dyn OnDemandRelay<Source, Target>>,
 		target_to_source_headers_relay: Arc<dyn OnDemandRelay<Target, Source>>,
 		lane_id: LaneId,
+		maybe_limits: Option<MessagesRelayLimits>,
 	) -> MessagesRelayParams<Bridge::MessagesLane> {
 		MessagesRelayParams {
 			source_client: self.source.client.clone(),
@@ -185,6 +192,7 @@ where
 			source_to_target_headers_relay: Some(source_to_target_headers_relay),
 			target_to_source_headers_relay: Some(target_to_source_headers_relay),
 			lane_id,
+			limits: maybe_limits,
 			metrics_params: self.metrics_params.clone().disable(),
 		}
 	}
@@ -202,6 +210,7 @@ declare_chain_cli_schema!(Kusama, kusama);
 declare_chain_cli_schema!(BridgeHubKusama, bridge_hub_kusama);
 declare_chain_cli_schema!(Polkadot, polkadot);
 declare_chain_cli_schema!(BridgeHubPolkadot, bridge_hub_polkadot);
+declare_chain_cli_schema!(PolkadotBulletin, polkadot_bulletin);
 // Means to override signers of different layer transactions.
 declare_chain_cli_schema!(MillauHeadersToRialto, millau_headers_to_rialto);
 declare_chain_cli_schema!(MillauHeadersToRialtoParachain, millau_headers_to_rialto_parachain);
@@ -227,11 +236,21 @@ declare_chain_cli_schema!(
 	PolkadotParachainsToBridgeHubKusama,
 	polkadot_parachains_to_bridge_hub_kusama
 );
+declare_chain_cli_schema!(
+	PolkadotBulletinHeadersToBridgeHubPolkadot,
+	polkadot_bulletin_headers_to_bridge_hub_polkadot
+);
+declare_chain_cli_schema!(PolkadotHeadersToPolkadotBulletin, polkadot_headers_to_polkadot_bulletin);
+declare_chain_cli_schema!(
+	PolkadotParachainsToPolkadotBulletin,
+	polkadot_parachains_to_polkadot_bulletin
+);
 // All supported bridges.
 declare_relay_to_relay_bridge_schema!(Millau, Rialto);
 declare_relay_to_parachain_bridge_schema!(Millau, RialtoParachain, Rialto);
 declare_parachain_to_parachain_bridge_schema!(BridgeHubRococo, Rococo, BridgeHubWococo, Wococo);
 declare_parachain_to_parachain_bridge_schema!(BridgeHubKusama, Kusama, BridgeHubPolkadot, Polkadot);
+declare_relay_to_parachain_bridge_schema!(PolkadotBulletin, BridgeHubPolkadot, Polkadot);
 
 /// Base portion of the bidirectional complex relay.
 ///
@@ -370,6 +389,7 @@ where
 				left_to_right_on_demand_headers.clone(),
 				right_to_left_on_demand_headers.clone(),
 				lane,
+				Self::L2R::maybe_messages_limits(),
 			))
 			.map_err(|e| anyhow::format_err!("{}", e))
 			.boxed();
@@ -381,6 +401,7 @@ where
 				right_to_left_on_demand_headers.clone(),
 				left_to_right_on_demand_headers.clone(),
 				lane,
+				Self::R2L::maybe_messages_limits(),
 			))
 			.map_err(|e| anyhow::format_err!("{}", e))
 			.boxed();
@@ -500,6 +521,32 @@ impl Full2WayBridge for BridgeHubKusamaBridgeHubPolkadotFull2WayBridge {
 	}
 }
 
+/// `PolkadotBulletin` <> `BridgeHubPolkadot` complex relay.
+pub struct PolkadotBulletinBridgeHubPolkadotFull2WayBridge {
+	base: <Self as Full2WayBridge>::Base,
+}
+
+#[async_trait]
+impl Full2WayBridge for PolkadotBulletinBridgeHubPolkadotFull2WayBridge {
+	type Base = RelayToParachainBridge<Self::L2R, Self::R2L>;
+	type Left = relay_polkadot_bulletin_client::PolkadotBulletin;
+	type Right = relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
+	type L2R = PolkadotBulletinToBridgeHubPolkadotCliBridge;
+	type R2L = PolkadotToPolkadotBulletinCliBridge;
+
+	fn new(base: Self::Base) -> anyhow::Result<Self> {
+		Ok(Self { base })
+	}
+
+	fn base(&self) -> &Self::Base {
+		&self.base
+	}
+
+	fn mut_base(&mut self) -> &mut Self::Base {
+		&mut self.base
+	}
+}
+
 /// Complex headers+messages relay.
 #[derive(Debug, PartialEq, StructOpt)]
 pub enum RelayHeadersAndMessages {
@@ -511,6 +558,8 @@ pub enum RelayHeadersAndMessages {
 	BridgeHubRococoBridgeHubWococo(BridgeHubRococoBridgeHubWococoHeadersAndMessages),
 	/// BridgeHubKusama <> BridgeHubPolkadot relay.
 	BridgeHubKusamaBridgeHubPolkadot(BridgeHubKusamaBridgeHubPolkadotHeadersAndMessages),
+	/// `PolkadotBulletin` <> `BridgeHubPolkadot` relay.
+	PolkadotBulletinBridgeHubPolkadot(PolkadotBulletinBridgeHubPolkadotHeadersAndMessages),
 }
 
 impl RelayHeadersAndMessages {
@@ -531,6 +580,10 @@ impl RelayHeadersAndMessages {
 				BridgeHubKusamaBridgeHubPolkadotFull2WayBridge::new(params.into_bridge().await?)?
 					.run()
 					.await,
+			RelayHeadersAndMessages::PolkadotBulletinBridgeHubPolkadot(params) =>
+				PolkadotBulletinBridgeHubPolkadotFull2WayBridge::new(params.into_bridge().await?)?
+					.run()
+					.await,
 		}
 	}
 }

bridges/relays/bin-substrate/src/cli/relay_messages.rs

@@ -24,6 +24,10 @@ use crate::bridges::{
 		bridge_hub_kusama_messages_to_bridge_hub_polkadot::BridgeHubKusamaToBridgeHubPolkadotMessagesCliBridge,
 		bridge_hub_polkadot_messages_to_bridge_hub_kusama::BridgeHubPolkadotToBridgeHubKusamaMessagesCliBridge,
 	},
+	polkadot_bulletin::{
+		bridge_hub_polkadot_messages_to_polkadot_bulletin::BridgeHubPolkadotToPolkadotBulletinMessagesCliBridge,
+		polkadot_bulletin_messages_to_bridge_hub_polkadot::PolkadotBulletinToBridgeHubPolkadotMessagesCliBridge,
+	},
 	rialto_millau::{
 		millau_headers_to_rialto::MillauToRialtoCliBridge,
 		rialto_headers_to_millau::RialtoToMillauCliBridge,
@@ -93,6 +97,7 @@ where
 			source_to_target_headers_relay: None,
 			target_to_source_headers_relay: None,
 			lane_id: data.lane.into(),
+			limits: Self::maybe_messages_limits(),
 			metrics_params: data.prometheus_params.into_metrics_params()?,
 		})
 		.await
@@ -108,6 +113,8 @@ impl MessagesRelayer for BridgeHubRococoToBridgeHubWococoMessagesCliBridge {}
 impl MessagesRelayer for BridgeHubWococoToBridgeHubRococoMessagesCliBridge {}
 impl MessagesRelayer for BridgeHubKusamaToBridgeHubPolkadotMessagesCliBridge {}
 impl MessagesRelayer for BridgeHubPolkadotToBridgeHubKusamaMessagesCliBridge {}
+impl MessagesRelayer for PolkadotBulletinToBridgeHubPolkadotMessagesCliBridge {}
+impl MessagesRelayer for BridgeHubPolkadotToPolkadotBulletinMessagesCliBridge {}
 
 impl RelayMessages {
 	/// Run the command.
@@ -127,6 +134,10 @@ impl RelayMessages {
 				BridgeHubKusamaToBridgeHubPolkadotMessagesCliBridge::relay_messages(self),
 			FullBridge::BridgeHubPolkadotToBridgeHubKusama =>
 				BridgeHubPolkadotToBridgeHubKusamaMessagesCliBridge::relay_messages(self),
+			FullBridge::PolkadotBulletinToBridgeHubPolkadot =>
+				PolkadotBulletinToBridgeHubPolkadotMessagesCliBridge::relay_messages(self),
+			FullBridge::BridgeHubPolkadotToPolkadotBulletin =>
+				BridgeHubPolkadotToPolkadotBulletinMessagesCliBridge::relay_messages(self),
 		}
 		.await
 	}

bridges/relays/bin-substrate/src/cli/relay_parachains.rs

@@ -19,6 +19,7 @@ use crate::bridges::{
 		kusama_parachains_to_bridge_hub_polkadot::BridgeHubKusamaToBridgeHubPolkadotCliBridge,
 		polkadot_parachains_to_bridge_hub_kusama::BridgeHubPolkadotToBridgeHubKusamaCliBridge,
 	},
+	polkadot_bulletin::polkadot_parachains_to_polkadot_bulletin::PolkadotToPolkadotBulletinCliBridge,
 	rialto_parachain_millau::rialto_parachains_to_millau::RialtoParachainToMillauCliBridge,
 	rococo_wococo::{
 		rococo_parachains_to_bridge_hub_wococo::BridgeHubRococoToBridgeHubWococoCliBridge,
@@ -71,6 +72,7 @@ pub enum RelayParachainsBridge {
 	WococoToBridgeHubRococo,
 	KusamaToBridgeHubPolkadot,
 	PolkadotToBridgeHubKusama,
+	PolkadotToPolkadotBulletin,
 }
 
 #[async_trait]
@@ -120,6 +122,7 @@ impl ParachainsRelayer for BridgeHubRococoToBridgeHubWococoCliBridge {}
 impl ParachainsRelayer for BridgeHubWococoToBridgeHubRococoCliBridge {}
 impl ParachainsRelayer for BridgeHubKusamaToBridgeHubPolkadotCliBridge {}
 impl ParachainsRelayer for BridgeHubPolkadotToBridgeHubKusamaCliBridge {}
+impl ParachainsRelayer for PolkadotToPolkadotBulletinCliBridge {}
 
 impl RelayParachains {
 	/// Run the command.
@@ -137,6 +140,8 @@ impl RelayParachains {
 				BridgeHubKusamaToBridgeHubPolkadotCliBridge::relay_parachains(self),
 			RelayParachainsBridge::PolkadotToBridgeHubKusama =>
 				BridgeHubPolkadotToBridgeHubKusamaCliBridge::relay_parachains(self),
+			RelayParachainsBridge::PolkadotToPolkadotBulletin =>
+				PolkadotToPolkadotBulletinCliBridge::relay_parachains(self),
 		}
 		.await
 	}

bridges/relays/bin-substrate/src/cli/send_message.rs

@@ -109,18 +109,8 @@ impl SendMessage {
 				MillauToRialtoParachainCliBridge::send_message(self),
 			FullBridge::RialtoParachainToMillau =>
 				RialtoParachainToMillauCliBridge::send_message(self),
-			FullBridge::BridgeHubRococoToBridgeHubWococo => unimplemented!(
-				"Sending message from BridgeHubRococo to BridgeHubWococo is not supported"
-			),
-			FullBridge::BridgeHubWococoToBridgeHubRococo => unimplemented!(
-				"Sending message from BridgeHubWococo to BridgeHubRococo is not supported"
-			),
-			FullBridge::BridgeHubKusamaToBridgeHubPolkadot => unimplemented!(
-				"Sending message from BridgeHubKusama to BridgeHubPolkadot is not supported"
-			),
-			FullBridge::BridgeHubPolkadotToBridgeHubKusama => unimplemented!(
-				"Sending message from BridgeHubPolkadot to BridgeHubKusama is not supported"
-			),
+			// all our (soon to retire_ testnets are above, so if is fine to use `_`
+			_ => unimplemented!("Sending message from in {:?} is not supported", self.bridge,),
 		}
 		.await
 	}