Squashed 'bridges/' content from commit 89a76998f

git-subtree-dir: bridges
git-subtree-split: 89a76998f93c8219e9b1f785dcce73d4891e7068

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

@@ -0,0 +1,96 @@
+// 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/>.
+
+use structopt::clap::arg_enum;
+
+arg_enum! {
+	#[derive(Debug, PartialEq, Eq)]
+	/// Supported full bridges (headers + messages).
+	pub enum FullBridge {
+		MillauToRialto,
+		RialtoToMillau,
+	}
+}
+
+impl FullBridge {
+	/// Return instance index of the bridge pallet in source runtime.
+	pub fn bridge_instance_index(&self) -> u8 {
+		match self {
+			Self::MillauToRialto => MILLAU_TO_RIALTO_INDEX,
+			Self::RialtoToMillau => RIALTO_TO_MILLAU_INDEX,
+		}
+	}
+}
+
+pub const RIALTO_TO_MILLAU_INDEX: u8 = 0;
+pub const MILLAU_TO_RIALTO_INDEX: u8 = 0;
+
+/// The macro allows executing bridge-specific code without going fully generic.
+///
+/// It matches on the [`FullBridge`] enum, sets bridge-specific types or imports and injects
+/// the `$generic` code at every variant.
+#[macro_export]
+macro_rules! select_full_bridge {
+	($bridge: expr, $generic: tt) => {
+		match $bridge {
+			FullBridge::MillauToRialto => {
+				type Source = relay_millau_client::Millau;
+				#[allow(dead_code)]
+				type Target = relay_rialto_client::Rialto;
+
+				// Derive-account
+				#[allow(unused_imports)]
+				use bp_millau::derive_account_from_rialto_id as derive_account;
+
+				// Relay-messages
+				#[allow(unused_imports)]
+				use crate::chains::millau_messages_to_rialto::run as relay_messages;
+
+				// Send-message / Estimate-fee
+				#[allow(unused_imports)]
+				use bp_rialto::TO_RIALTO_ESTIMATE_MESSAGE_FEE_METHOD as ESTIMATE_MESSAGE_FEE_METHOD;
+				// Send-message
+				#[allow(unused_imports)]
+				use millau_runtime::rialto_account_ownership_digest as account_ownership_digest;
+
+				$generic
+			}
+			FullBridge::RialtoToMillau => {
+				type Source = relay_rialto_client::Rialto;
+				#[allow(dead_code)]
+				type Target = relay_millau_client::Millau;
+
+				// Derive-account
+				#[allow(unused_imports)]
+				use bp_rialto::derive_account_from_millau_id as derive_account;
+
+				// Relay-messages
+				#[allow(unused_imports)]
+				use crate::chains::rialto_messages_to_millau::run as relay_messages;
+
+				// Send-message / Estimate-fee
+				#[allow(unused_imports)]
+				use bp_millau::TO_MILLAU_ESTIMATE_MESSAGE_FEE_METHOD as ESTIMATE_MESSAGE_FEE_METHOD;
+
+				// Send-message
+				#[allow(unused_imports)]
+				use rialto_runtime::millau_account_ownership_digest as account_ownership_digest;
+
+				$generic
+			}
+		}
+	};
+}

polkadot/relays/bin-substrate/src/cli/derive_account.rs

@@ -0,0 +1,102 @@
+// 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/>.
+
+use crate::cli::{bridge::FullBridge, AccountId};
+use crate::select_full_bridge;
+use relay_substrate_client::Chain;
+use structopt::StructOpt;
+
+/// Given a source chain `AccountId`, derive the corresponding `AccountId` for the target chain.
+///
+/// The (derived) target chain `AccountId` is going to be used as dispatch origin of the call
+/// that has been sent over the bridge.
+/// This account can also be used to receive target-chain funds (or other form of ownership),
+/// since messages sent over the bridge will be able to spend these.
+#[derive(StructOpt)]
+pub struct DeriveAccount {
+	/// A bridge instance to initalize.
+	#[structopt(possible_values = &FullBridge::variants(), case_insensitive = true)]
+	bridge: FullBridge,
+	/// Source-chain address to derive Target-chain address from.
+	account: AccountId,
+}
+
+impl DeriveAccount {
+	/// Parse CLI arguments and derive account.
+	///
+	/// Returns both the Source account in correct SS58 format and the derived account.
+	fn derive_account(&self) -> (AccountId, AccountId) {
+		select_full_bridge!(self.bridge, {
+			let mut account = self.account.clone();
+			account.enforce_chain::<Source>();
+			let acc = bp_runtime::SourceAccount::Account(account.raw_id());
+			let id = derive_account(acc);
+			let derived_account = AccountId::from_raw::<Target>(id);
+			(account, derived_account)
+		})
+	}
+
+	/// Run the command.
+	pub async fn run(self) -> anyhow::Result<()> {
+		select_full_bridge!(self.bridge, {
+			let (account, derived_account) = self.derive_account();
+			println!("Source address:\n{} ({})", account, Source::NAME);
+			println!(
+				"->Corresponding (derived) address:\n{} ({})",
+				derived_account,
+				Target::NAME,
+			);
+
+			Ok(())
+		})
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+
+	fn derive_account_cli(bridge: &str, account: &str) -> (AccountId, AccountId) {
+		DeriveAccount::from_iter(vec!["derive-account", bridge, account]).derive_account()
+	}
+
+	#[test]
+	fn should_derive_accounts_correctly() {
+		// given
+		let rialto = "5sauUXUfPjmwxSgmb3tZ5d6yx24eZX4wWJ2JtVUBaQqFbvEU";
+		let millau = "752paRyW1EGfq9YLTSSqcSJ5hqnBDidBmaftGhBo8fy6ypW9";
+
+		// when
+		let (rialto_parsed, rialto_derived) = derive_account_cli("RialtoToMillau", rialto);
+		let (millau_parsed, millau_derived) = derive_account_cli("MillauToRialto", millau);
+		let (millau2_parsed, millau2_derived) = derive_account_cli("MillauToRialto", rialto);
+
+		// then
+		assert_eq!(format!("{}", rialto_parsed), rialto);
+		assert_eq!(format!("{}", millau_parsed), millau);
+		assert_eq!(format!("{}", millau2_parsed), millau);
+
+		assert_eq!(
+			format!("{}", rialto_derived),
+			"73gLnUwrAdH4vMjbXCiNEpgyz1PLk9JxCaY4cKzvfSZT73KE"
+		);
+		assert_eq!(
+			format!("{}", millau_derived),
+			"5rpTJqGv1BPAYy2sXzkPpc3Wx1ZpQtgfuBsrDpNV4HsXAmbi"
+		);
+		assert_eq!(millau_derived, millau2_derived);
+	}
+}

polkadot/relays/bin-substrate/src/cli/encode_call.rs

@@ -0,0 +1,275 @@
+// 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/>.
+
+use crate::cli::bridge::FullBridge;
+use crate::cli::{AccountId, Balance, CliChain, ExplicitOrMaximal, HexBytes, HexLaneId};
+use crate::select_full_bridge;
+use frame_support::dispatch::GetDispatchInfo;
+use relay_substrate_client::Chain;
+use structopt::StructOpt;
+
+/// Encode source chain runtime call.
+#[derive(StructOpt, Debug)]
+pub struct EncodeCall {
+	/// A bridge instance to encode call for.
+	#[structopt(possible_values = &FullBridge::variants(), case_insensitive = true)]
+	bridge: FullBridge,
+	#[structopt(flatten)]
+	call: Call,
+}
+
+/// All possible messages that may be delivered to generic Substrate chain.
+///
+/// Note this enum may be used in the context of both Source (as part of `encode-call`)
+/// and Target chain (as part of `encode-message/send-message`).
+#[derive(StructOpt, Debug, PartialEq, Eq)]
+pub enum Call {
+	/// Raw bytes for the message
+	Raw {
+		/// Raw, SCALE-encoded message
+		data: HexBytes,
+	},
+	/// Make an on-chain remark (comment).
+	Remark {
+		/// Explicit remark payload.
+		#[structopt(long, conflicts_with("remark-size"))]
+		remark_payload: Option<HexBytes>,
+		/// Remark size. If not passed, small UTF8-encoded string is generated by relay as remark.
+		#[structopt(long, conflicts_with("remark-payload"))]
+		remark_size: Option<ExplicitOrMaximal<usize>>,
+	},
+	/// Transfer the specified `amount` of native tokens to a particular `recipient`.
+	Transfer {
+		/// Address of an account to receive the transfer.
+		#[structopt(long)]
+		recipient: AccountId,
+		/// Amount of target tokens to send in target chain base currency units.
+		#[structopt(long)]
+		amount: Balance,
+	},
+	/// A call to the specific Bridge Messages pallet to queue message to be sent over a bridge.
+	BridgeSendMessage {
+		/// An index of the bridge instance which represents the expected target chain.
+		#[structopt(skip = 255)]
+		bridge_instance_index: u8,
+		/// Hex-encoded lane id that should be served by the relay. Defaults to `00000000`.
+		#[structopt(long, default_value = "00000000")]
+		lane: HexLaneId,
+		/// Raw SCALE-encoded Message Payload to submit to the messages pallet.
+		///
+		/// This can be obtained by encoding call for the target chain.
+		#[structopt(long)]
+		payload: HexBytes,
+		/// Declared delivery and dispatch fee in base source-chain currency units.
+		#[structopt(long)]
+		fee: Balance,
+	},
+}
+
+pub trait CliEncodeCall: Chain {
+	/// Maximal size (in bytes) of any extrinsic (from the runtime).
+	fn max_extrinsic_size() -> u32;
+
+	/// Encode a CLI call.
+	fn encode_call(call: &Call) -> anyhow::Result<Self::Call>;
+}
+
+impl EncodeCall {
+	fn encode(&mut self) -> anyhow::Result<HexBytes> {
+		select_full_bridge!(self.bridge, {
+			preprocess_call::<Source, Target>(&mut self.call, self.bridge.bridge_instance_index());
+			let call = Source::encode_call(&self.call)?;
+
+			let encoded = HexBytes::encode(&call);
+
+			log::info!(target: "bridge", "Generated {} call: {:#?}", Source::NAME, call);
+			log::info!(target: "bridge", "Weight of {} call: {}", Source::NAME, call.get_dispatch_info().weight);
+			log::info!(target: "bridge", "Encoded {} call: {:?}", Source::NAME, encoded);
+
+			Ok(encoded)
+		})
+	}
+
+	/// Run the command.
+	pub async fn run(mut self) -> anyhow::Result<()> {
+		println!("{:?}", self.encode()?);
+		Ok(())
+	}
+}
+
+/// Prepare the call to be passed to [`CliEncodeCall::encode_call`].
+///
+/// This function will fill in all optional and missing pieces and will make sure that
+/// values are converted to bridge-specific ones.
+///
+/// Most importantly, the method will fill-in [`bridge_instance_index`] parameter for
+/// target-chain specific calls.
+pub(crate) fn preprocess_call<Source: CliEncodeCall + CliChain, Target: CliEncodeCall>(
+	call: &mut Call,
+	bridge_instance: u8,
+) {
+	match *call {
+		Call::Raw { .. } => {}
+		Call::Remark {
+			ref remark_size,
+			ref mut remark_payload,
+		} => {
+			if remark_payload.is_none() {
+				*remark_payload = Some(HexBytes(generate_remark_payload(
+					&remark_size,
+					compute_maximal_message_arguments_size(Source::max_extrinsic_size(), Target::max_extrinsic_size()),
+				)));
+			}
+		}
+		Call::Transfer { ref mut recipient, .. } => {
+			recipient.enforce_chain::<Source>();
+		}
+		Call::BridgeSendMessage {
+			ref mut bridge_instance_index,
+			..
+		} => {
+			*bridge_instance_index = bridge_instance;
+		}
+	};
+}
+
+fn generate_remark_payload(remark_size: &Option<ExplicitOrMaximal<usize>>, maximal_allowed_size: u32) -> Vec<u8> {
+	match remark_size {
+		Some(ExplicitOrMaximal::Explicit(remark_size)) => vec![0; *remark_size],
+		Some(ExplicitOrMaximal::Maximal) => vec![0; maximal_allowed_size as _],
+		None => format!(
+			"Unix time: {}",
+			std::time::SystemTime::now()
+				.duration_since(std::time::SystemTime::UNIX_EPOCH)
+				.unwrap_or_default()
+				.as_secs(),
+		)
+		.as_bytes()
+		.to_vec(),
+	}
+}
+
+pub(crate) fn compute_maximal_message_arguments_size(
+	maximal_source_extrinsic_size: u32,
+	maximal_target_extrinsic_size: u32,
+) -> u32 {
+	// assume that both signed extensions and other arguments fit 1KB
+	let service_tx_bytes_on_source_chain = 1024;
+	let maximal_source_extrinsic_size = maximal_source_extrinsic_size - service_tx_bytes_on_source_chain;
+	let maximal_call_size =
+		bridge_runtime_common::messages::target::maximal_incoming_message_size(maximal_target_extrinsic_size);
+	let maximal_call_size = if maximal_call_size > maximal_source_extrinsic_size {
+		maximal_source_extrinsic_size
+	} else {
+		maximal_call_size
+	};
+
+	// bytes in Call encoding that are used to encode everything except arguments
+	let service_bytes = 1 + 1 + 4;
+	maximal_call_size - service_bytes
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+
+	#[test]
+	fn should_encode_transfer_call() {
+		// given
+		let mut encode_call = EncodeCall::from_iter(vec![
+			"encode-call",
+			"RialtoToMillau",
+			"transfer",
+			"--amount",
+			"12345",
+			"--recipient",
+			"5sauUXUfPjmwxSgmb3tZ5d6yx24eZX4wWJ2JtVUBaQqFbvEU",
+		]);
+
+		// when
+		let hex = encode_call.encode().unwrap();
+
+		// then
+		assert_eq!(
+			format!("{:?}", hex),
+			"0x0c00d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27de5c0"
+		);
+	}
+
+	#[test]
+	fn should_encode_remark_with_default_payload() {
+		// given
+		let mut encode_call = EncodeCall::from_iter(vec!["encode-call", "RialtoToMillau", "remark"]);
+
+		// when
+		let hex = encode_call.encode().unwrap();
+
+		// then
+		assert!(format!("{:?}", hex).starts_with("0x070154556e69782074696d653a"));
+	}
+
+	#[test]
+	fn should_encode_remark_with_explicit_payload() {
+		// given
+		let mut encode_call = EncodeCall::from_iter(vec![
+			"encode-call",
+			"RialtoToMillau",
+			"remark",
+			"--remark-payload",
+			"1234",
+		]);
+
+		// when
+		let hex = encode_call.encode().unwrap();
+
+		// then
+		assert_eq!(format!("{:?}", hex), "0x0701081234");
+	}
+
+	#[test]
+	fn should_encode_remark_with_size() {
+		// given
+		let mut encode_call =
+			EncodeCall::from_iter(vec!["encode-call", "RialtoToMillau", "remark", "--remark-size", "12"]);
+
+		// when
+		let hex = encode_call.encode().unwrap();
+
+		// then
+		assert_eq!(format!("{:?}", hex), "0x070130000000000000000000000000");
+	}
+
+	#[test]
+	fn should_disallow_both_payload_and_size() {
+		// when
+		let err = EncodeCall::from_iter_safe(vec![
+			"encode-call",
+			"RialtoToMillau",
+			"remark",
+			"--remark-payload",
+			"1234",
+			"--remark-size",
+			"12",
+		])
+		.unwrap_err();
+
+		// then
+		assert_eq!(err.kind, structopt::clap::ErrorKind::ArgumentConflict);
+
+		let info = err.info.unwrap();
+		assert!(info.contains(&"remark-payload".to_string()) | info.contains(&"remark-size".to_string()))
+	}
+}

polkadot/relays/bin-substrate/src/cli/encode_message.rs

@@ -0,0 +1,106 @@
+// 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/>.
+
+use crate::cli::{bridge::FullBridge, AccountId, CliChain, HexBytes};
+use crate::select_full_bridge;
+use structopt::StructOpt;
+
+/// Generic message payload.
+#[derive(StructOpt, Debug, PartialEq, Eq)]
+pub enum MessagePayload {
+	/// Raw, SCALE-encoded `MessagePayload`.
+	Raw {
+		/// Hex-encoded SCALE data.
+		data: HexBytes,
+	},
+	/// Construct message to send over the bridge.
+	Call {
+		/// Message details.
+		#[structopt(flatten)]
+		call: crate::cli::encode_call::Call,
+		/// SS58 encoded Source account that will send the payload.
+		#[structopt(long)]
+		sender: AccountId,
+	},
+}
+
+/// A `MessagePayload` to encode.
+#[derive(StructOpt)]
+pub struct EncodeMessage {
+	/// A bridge instance to initalize.
+	#[structopt(possible_values = &FullBridge::variants(), case_insensitive = true)]
+	bridge: FullBridge,
+	#[structopt(flatten)]
+	payload: MessagePayload,
+}
+
+impl EncodeMessage {
+	/// Run the command.
+	pub fn encode(self) -> anyhow::Result<HexBytes> {
+		select_full_bridge!(self.bridge, {
+			let payload = Source::encode_message(self.payload).map_err(|e| anyhow::format_err!("{}", e))?;
+			Ok(HexBytes::encode(&payload))
+		})
+	}
+
+	/// Run the command.
+	pub async fn run(self) -> anyhow::Result<()> {
+		let payload = self.encode()?;
+		println!("{:?}", payload);
+		Ok(())
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+	use sp_core::crypto::Ss58Codec;
+
+	#[test]
+	fn should_encode_raw_message() {
+		// given
+		let msg = "01000000e88514000000000002d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d3c040130000000000000000000000000";
+		let encode_message = EncodeMessage::from_iter(vec!["encode-message", "MillauToRialto", "raw", msg]);
+
+		// when
+		let hex = encode_message.encode().unwrap();
+
+		// then
+		assert_eq!(format!("{:?}", hex), format!("0x{}", msg));
+	}
+
+	#[test]
+	fn should_encode_remark_with_size() {
+		// given
+		let sender = sp_keyring::AccountKeyring::Alice.to_account_id().to_ss58check();
+		let encode_message = EncodeMessage::from_iter(vec![
+			"encode-message",
+			"RialtoToMillau",
+			"call",
+			"--sender",
+			&sender,
+			"remark",
+			"--remark-size",
+			"12",
+		]);
+
+		// when
+		let hex = encode_message.encode().unwrap();
+
+		// then
+		assert_eq!(format!("{:?}", hex), "0x01000000e88514000000000002d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d3c040130000000000000000000000000");
+	}
+}

polkadot/relays/bin-substrate/src/cli/estimate_fee.rs

@@ -0,0 +1,128 @@
+// 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/>.
+
+use crate::cli::bridge::FullBridge;
+use crate::cli::{Balance, CliChain, HexBytes, HexLaneId, SourceConnectionParams};
+use crate::select_full_bridge;
+use codec::{Decode, Encode};
+use relay_substrate_client::{Chain, ChainWithBalances};
+use structopt::StructOpt;
+
+/// Estimate Delivery & Dispatch Fee command.
+#[derive(StructOpt, Debug, PartialEq, Eq)]
+pub struct EstimateFee {
+	/// A bridge instance to encode call for.
+	#[structopt(possible_values = &FullBridge::variants(), case_insensitive = true)]
+	bridge: FullBridge,
+	#[structopt(flatten)]
+	source: SourceConnectionParams,
+	/// Hex-encoded id of lane that will be delivering the message.
+	#[structopt(long, default_value = "00000000")]
+	lane: HexLaneId,
+	/// Payload to send over the bridge.
+	#[structopt(flatten)]
+	payload: crate::cli::encode_message::MessagePayload,
+}
+
+impl EstimateFee {
+	/// Run the command.
+	pub async fn run(self) -> anyhow::Result<()> {
+		let Self {
+			source,
+			bridge,
+			lane,
+			payload,
+		} = self;
+
+		select_full_bridge!(bridge, {
+			let source_client = source.to_client::<Source>().await?;
+			let lane = lane.into();
+			let payload = Source::encode_message(payload).map_err(|e| anyhow::format_err!("{:?}", e))?;
+
+			let fee: <Source as ChainWithBalances>::NativeBalance =
+				estimate_message_delivery_and_dispatch_fee(&source_client, ESTIMATE_MESSAGE_FEE_METHOD, lane, payload)
+					.await?;
+
+			log::info!(target: "bridge", "Fee: {:?}", Balance(fee as _));
+			println!("{}", fee);
+			Ok(())
+		})
+	}
+}
+
+pub(crate) async fn estimate_message_delivery_and_dispatch_fee<Fee: Decode, C: Chain, P: Encode>(
+	client: &relay_substrate_client::Client<C>,
+	estimate_fee_method: &str,
+	lane: bp_messages::LaneId,
+	payload: P,
+) -> anyhow::Result<Fee> {
+	let encoded_response = client
+		.state_call(estimate_fee_method.into(), (lane, payload).encode().into(), None)
+		.await?;
+	let decoded_response: Option<Fee> =
+		Decode::decode(&mut &encoded_response.0[..]).map_err(relay_substrate_client::Error::ResponseParseFailed)?;
+	let fee = decoded_response
+		.ok_or_else(|| anyhow::format_err!("Unable to decode fee from: {:?}", HexBytes(encoded_response.to_vec())))?;
+	Ok(fee)
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+	use crate::cli::encode_call;
+	use sp_core::crypto::Ss58Codec;
+
+	#[test]
+	fn should_parse_cli_options() {
+		// given
+		let alice = sp_keyring::AccountKeyring::Alice.to_account_id().to_ss58check();
+
+		// when
+		let res = EstimateFee::from_iter(vec![
+			"estimate_fee",
+			"RialtoToMillau",
+			"--source-port",
+			"1234",
+			"call",
+			"--sender",
+			&alice,
+			"remark",
+			"--remark-payload",
+			"1234",
+		]);
+
+		// then
+		assert_eq!(
+			res,
+			EstimateFee {
+				bridge: FullBridge::RialtoToMillau,
+				lane: HexLaneId([0, 0, 0, 0]),
+				source: SourceConnectionParams {
+					source_host: "127.0.0.1".into(),
+					source_port: 1234,
+					source_secure: false,
+				},
+				payload: crate::cli::encode_message::MessagePayload::Call {
+					sender: alice.parse().unwrap(),
+					call: encode_call::Call::Remark {
+						remark_payload: Some(HexBytes(vec![0x12, 0x34])),
+						remark_size: None,
+					}
+				}
+			}
+		);
+	}
+}

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

@@ -0,0 +1,162 @@
+// 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/>.
+
+use crate::cli::{SourceConnectionParams, TargetConnectionParams, TargetSigningParams};
+use bp_header_chain::InitializationData;
+use bp_runtime::Chain as ChainBase;
+use codec::Encode;
+use relay_substrate_client::{Chain, TransactionSignScheme};
+use sp_core::{Bytes, Pair};
+use structopt::{clap::arg_enum, StructOpt};
+
+/// Initialize bridge pallet.
+#[derive(StructOpt)]
+pub struct InitBridge {
+	/// A bridge instance to initalize.
+	#[structopt(possible_values = &InitBridgeName::variants(), case_insensitive = true)]
+	bridge: InitBridgeName,
+	#[structopt(flatten)]
+	source: SourceConnectionParams,
+	#[structopt(flatten)]
+	target: TargetConnectionParams,
+	#[structopt(flatten)]
+	target_sign: TargetSigningParams,
+}
+
+// TODO [#851] Use kebab-case.
+arg_enum! {
+	#[derive(Debug)]
+	/// Bridge to initialize.
+	pub enum InitBridgeName {
+		MillauToRialto,
+		RialtoToMillau,
+		WestendToMillau,
+		WestendToRococo,
+		RococoToWestend,
+	}
+}
+
+macro_rules! select_bridge {
+	($bridge: expr, $generic: tt) => {
+		match $bridge {
+			InitBridgeName::MillauToRialto => {
+				type Source = relay_millau_client::Millau;
+				type Target = relay_rialto_client::Rialto;
+
+				fn encode_init_bridge(
+					init_data: InitializationData<<Source as ChainBase>::Header>,
+				) -> <Target as Chain>::Call {
+					rialto_runtime::SudoCall::sudo(Box::new(
+						rialto_runtime::BridgeGrandpaMillauCall::initialize(init_data).into(),
+					))
+					.into()
+				}
+
+				$generic
+			}
+			InitBridgeName::RialtoToMillau => {
+				type Source = relay_rialto_client::Rialto;
+				type Target = relay_millau_client::Millau;
+
+				fn encode_init_bridge(
+					init_data: InitializationData<<Source as ChainBase>::Header>,
+				) -> <Target as Chain>::Call {
+					let initialize_call = millau_runtime::BridgeGrandpaRialtoCall::<
+						millau_runtime::Runtime,
+						millau_runtime::RialtoGrandpaInstance,
+					>::initialize(init_data);
+					millau_runtime::SudoCall::sudo(Box::new(initialize_call.into())).into()
+				}
+
+				$generic
+			}
+			InitBridgeName::WestendToMillau => {
+				type Source = relay_westend_client::Westend;
+				type Target = relay_millau_client::Millau;
+
+				fn encode_init_bridge(
+					init_data: InitializationData<<Source as ChainBase>::Header>,
+				) -> <Target as Chain>::Call {
+					// at Westend -> Millau initialization we're not using sudo, because otherwise our deployments
+					// may fail, because we need to initialize both Rialto -> Millau and Westend -> Millau bridge.
+					// => since there's single possible sudo account, one of transaction may fail with duplicate nonce error
+					millau_runtime::BridgeGrandpaWestendCall::<
+						millau_runtime::Runtime,
+						millau_runtime::WestendGrandpaInstance,
+					>::initialize(init_data)
+					.into()
+				}
+
+				$generic
+			}
+			InitBridgeName::WestendToRococo => {
+				type Source = relay_westend_client::Westend;
+				type Target = relay_rococo_client::Rococo;
+
+				fn encode_init_bridge(
+					init_data: InitializationData<<Source as ChainBase>::Header>,
+				) -> <Target as Chain>::Call {
+					bp_rococo::Call::BridgeGrandpaWestend(bp_rococo::BridgeGrandpaWestendCall::initialize(init_data))
+				}
+
+				$generic
+			}
+			InitBridgeName::RococoToWestend => {
+				type Source = relay_rococo_client::Rococo;
+				type Target = relay_westend_client::Westend;
+
+				fn encode_init_bridge(
+					init_data: InitializationData<<Source as ChainBase>::Header>,
+				) -> <Target as Chain>::Call {
+					bp_westend::Call::BridgeGrandpaRococo(bp_westend::BridgeGrandpaRococoCall::initialize(init_data))
+				}
+
+				$generic
+			}
+		}
+	};
+}
+
+impl InitBridge {
+	/// Run the command.
+	pub async fn run(self) -> anyhow::Result<()> {
+		select_bridge!(self.bridge, {
+			let source_client = self.source.to_client::<Source>().await?;
+			let target_client = self.target.to_client::<Target>().await?;
+			let target_sign = self.target_sign.to_keypair::<Target>()?;
+
+			crate::headers_initialize::initialize(
+				source_client,
+				target_client.clone(),
+				target_sign.public().into(),
+				move |transaction_nonce, initialization_data| {
+					Bytes(
+						Target::sign_transaction(
+							*target_client.genesis_hash(),
+							&target_sign,
+							transaction_nonce,
+							encode_init_bridge(initialization_data),
+						)
+						.encode(),
+					)
+				},
+			)
+			.await;
+
+			Ok(())
+		})
+	}
+}

polkadot/relays/bin-substrate/src/cli/mod.rs

@@ -0,0 +1,444 @@
+// 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/>.
+
+//! Deal with CLI args of substrate-to-substrate relay.
+
+use std::convert::TryInto;
+
+use bp_messages::LaneId;
+use codec::{Decode, Encode};
+use frame_support::weights::Weight;
+use sp_runtime::app_crypto::Ss58Codec;
+use structopt::{clap::arg_enum, StructOpt};
+
+pub(crate) mod bridge;
+pub(crate) mod encode_call;
+pub(crate) mod encode_message;
+pub(crate) mod estimate_fee;
+pub(crate) mod send_message;
+
+mod derive_account;
+mod init_bridge;
+mod relay_headers;
+mod relay_headers_and_messages;
+mod relay_messages;
+
+/// Parse relay CLI args.
+pub fn parse_args() -> Command {
+	Command::from_args()
+}
+
+/// Substrate-to-Substrate bridge utilities.
+#[derive(StructOpt)]
+#[structopt(about = "Substrate-to-Substrate relay")]
+pub enum Command {
+	/// Start headers relay between two chains.
+	///
+	/// The on-chain bridge component should have been already initialized with
+	/// `init-bridge` sub-command.
+	RelayHeaders(relay_headers::RelayHeaders),
+	/// Start messages relay between two chains.
+	///
+	/// Ties up to `Messages` pallets on both chains and starts relaying messages.
+	/// Requires the header relay to be already running.
+	RelayMessages(relay_messages::RelayMessages),
+	/// Start headers and messages relay between two Substrate chains.
+	///
+	/// This high-level relay internally starts four low-level relays: two `RelayHeaders`
+	/// and two `RelayMessages` relays. Headers are only relayed when they are required by
+	/// the message relays - i.e. when there are messages or confirmations that needs to be
+	/// relayed between chains.
+	RelayHeadersAndMessages(relay_headers_and_messages::RelayHeadersAndMessages),
+	/// Initialize on-chain bridge pallet with current header data.
+	///
+	/// Sends initialization transaction to bootstrap the bridge with current finalized block data.
+	InitBridge(init_bridge::InitBridge),
+	/// Send custom message over the bridge.
+	///
+	/// Allows interacting with the bridge by sending messages over `Messages` component.
+	/// The message is being sent to the source chain, delivered to the target chain and dispatched
+	/// there.
+	SendMessage(send_message::SendMessage),
+	/// Generate SCALE-encoded `Call` for choosen network.
+	///
+	/// The call can be used either as message payload or can be wrapped into a transaction
+	/// and executed on the chain directly.
+	EncodeCall(encode_call::EncodeCall),
+	/// Generate SCALE-encoded `MessagePayload` object that can be sent over selected bridge.
+	///
+	/// The `MessagePayload` can be then fed to `Messages::send_message` function and sent over
+	/// the bridge.
+	EncodeMessage(encode_message::EncodeMessage),
+	/// Estimate Delivery and Dispatch Fee required for message submission to messages pallet.
+	EstimateFee(estimate_fee::EstimateFee),
+	/// Given a source chain `AccountId`, derive the corresponding `AccountId` for the target chain.
+	DeriveAccount(derive_account::DeriveAccount),
+}
+
+impl Command {
+	/// Run the command.
+	pub async fn run(self) -> anyhow::Result<()> {
+		match self {
+			Self::RelayHeaders(arg) => arg.run().await?,
+			Self::RelayMessages(arg) => arg.run().await?,
+			Self::RelayHeadersAndMessages(arg) => arg.run().await?,
+			Self::InitBridge(arg) => arg.run().await?,
+			Self::SendMessage(arg) => arg.run().await?,
+			Self::EncodeCall(arg) => arg.run().await?,
+			Self::EncodeMessage(arg) => arg.run().await?,
+			Self::EstimateFee(arg) => arg.run().await?,
+			Self::DeriveAccount(arg) => arg.run().await?,
+		}
+		Ok(())
+	}
+}
+
+arg_enum! {
+	#[derive(Debug)]
+	/// The origin to use when dispatching the message on the target chain.
+	///
+	/// - `Target` uses account existing on the target chain (requires target private key).
+	/// - `Origin` uses account derived from the source-chain account.
+	pub enum Origins {
+		Target,
+		Source,
+	}
+}
+
+/// Generic balance type.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct Balance(pub u128);
+
+impl std::fmt::Display for Balance {
+	fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
+		use num_format::{Locale, ToFormattedString};
+		write!(fmt, "{}", self.0.to_formatted_string(&Locale::en))
+	}
+}
+
+impl std::str::FromStr for Balance {
+	type Err = <u128 as std::str::FromStr>::Err;
+
+	fn from_str(s: &str) -> Result<Self, Self::Err> {
+		Ok(Self(s.parse()?))
+	}
+}
+
+impl Balance {
+	/// Cast balance to `u64` type, panicking if it's too large.
+	pub fn cast(&self) -> u64 {
+		self.0.try_into().expect("Balance is too high for this chain.")
+	}
+}
+
+/// Generic account id with custom parser.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct AccountId {
+	account: sp_runtime::AccountId32,
+	ss58_format: sp_core::crypto::Ss58AddressFormat,
+}
+
+impl std::fmt::Display for AccountId {
+	fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
+		write!(fmt, "{}", self.account.to_ss58check_with_version(self.ss58_format))
+	}
+}
+
+impl std::str::FromStr for AccountId {
+	type Err = String;
+
+	fn from_str(s: &str) -> Result<Self, Self::Err> {
+		let (account, ss58_format) = sp_runtime::AccountId32::from_ss58check_with_version(s)
+			.map_err(|err| format!("Unable to decode SS58 address: {:?}", err))?;
+		Ok(Self { account, ss58_format })
+	}
+}
+
+const SS58_FORMAT_PROOF: &str = "u16 -> Ss58Format is infallible; qed";
+
+impl AccountId {
+	/// Create new SS58-formatted address from raw account id.
+	pub fn from_raw<T: CliChain>(account: sp_runtime::AccountId32) -> Self {
+		Self {
+			account,
+			ss58_format: T::ss58_format().try_into().expect(SS58_FORMAT_PROOF),
+		}
+	}
+
+	/// Enforces formatting account to be for given [`CliChain`] type.
+	///
+	/// This will change the `ss58format` of the account to match the requested one.
+	/// Note that a warning will be produced in case the current format does not match
+	/// the requested one, but the conversion always succeeds.
+	pub fn enforce_chain<T: CliChain>(&mut self) {
+		let original = self.clone();
+		self.ss58_format = T::ss58_format().try_into().expect(SS58_FORMAT_PROOF);
+		log::debug!("{} SS58 format: {} (RAW: {})", self, self.ss58_format, self.account);
+		if original.ss58_format != self.ss58_format {
+			log::warn!(
+				target: "bridge",
+				"Address {} does not seem to match {}'s SS58 format (got: {}, expected: {}).\nConverted to: {}",
+				original,
+				T::NAME,
+				original.ss58_format,
+				self.ss58_format,
+				self,
+			)
+		}
+	}
+
+	/// Returns the raw (no SS58-prefixed) account id.
+	pub fn raw_id(&self) -> sp_runtime::AccountId32 {
+		self.account.clone()
+	}
+}
+
+/// Bridge-supported network definition.
+///
+/// Used to abstract away CLI commands.
+pub trait CliChain: relay_substrate_client::Chain {
+	/// Chain's current version of the runtime.
+	const RUNTIME_VERSION: sp_version::RuntimeVersion;
+
+	/// Crypto keypair type used to send messages.
+	///
+	/// In case of chains supporting multiple cryptos, pick one used by the CLI.
+	type KeyPair: sp_core::crypto::Pair;
+
+	/// Bridge Message Payload type.
+	///
+	/// TODO [#854] This should be removed in favour of target-specifc types.
+	type MessagePayload;
+
+	/// Numeric value of SS58 format.
+	fn ss58_format() -> u16;
+
+	/// Construct message payload to be sent over the bridge.
+	fn encode_message(message: crate::cli::encode_message::MessagePayload) -> Result<Self::MessagePayload, String>;
+
+	/// Maximal extrinsic weight (from the runtime).
+	fn max_extrinsic_weight() -> Weight;
+}
+
+/// Lane id.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct HexLaneId(pub LaneId);
+
+impl From<HexLaneId> for LaneId {
+	fn from(lane_id: HexLaneId) -> LaneId {
+		lane_id.0
+	}
+}
+
+impl std::str::FromStr for HexLaneId {
+	type Err = hex::FromHexError;
+
+	fn from_str(s: &str) -> Result<Self, Self::Err> {
+		let mut lane_id = LaneId::default();
+		hex::decode_to_slice(s, &mut lane_id)?;
+		Ok(HexLaneId(lane_id))
+	}
+}
+
+/// Nicer formatting for raw bytes vectors.
+#[derive(Default, Encode, Decode, PartialEq, Eq)]
+pub struct HexBytes(pub Vec<u8>);
+
+impl std::str::FromStr for HexBytes {
+	type Err = hex::FromHexError;
+
+	fn from_str(s: &str) -> Result<Self, Self::Err> {
+		Ok(Self(hex::decode(s)?))
+	}
+}
+
+impl std::fmt::Debug for HexBytes {
+	fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
+		write!(fmt, "0x{}", self)
+	}
+}
+
+impl std::fmt::Display for HexBytes {
+	fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
+		write!(fmt, "{}", hex::encode(&self.0))
+	}
+}
+
+impl HexBytes {
+	/// Encode given object and wrap into nicely formatted bytes.
+	pub fn encode<T: Encode>(t: &T) -> Self {
+		Self(t.encode())
+	}
+}
+
+/// Prometheus metrics params.
+#[derive(StructOpt)]
+pub struct PrometheusParams {
+	/// Do not expose a Prometheus metric endpoint.
+	#[structopt(long)]
+	pub no_prometheus: bool,
+	/// Expose Prometheus endpoint at given interface.
+	#[structopt(long, default_value = "127.0.0.1")]
+	pub prometheus_host: String,
+	/// Expose Prometheus endpoint at given port.
+	#[structopt(long, default_value = "9616")]
+	pub prometheus_port: u16,
+}
+
+impl From<PrometheusParams> for relay_utils::metrics::MetricsParams {
+	fn from(cli_params: PrometheusParams) -> relay_utils::metrics::MetricsParams {
+		if !cli_params.no_prometheus {
+			Some(relay_utils::metrics::MetricsAddress {
+				host: cli_params.prometheus_host,
+				port: cli_params.prometheus_port,
+			})
+			.into()
+		} else {
+			None.into()
+		}
+	}
+}
+
+/// Either explicit or maximal allowed value.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum ExplicitOrMaximal<V> {
+	/// User has explicitly specified argument value.
+	Explicit(V),
+	/// Maximal allowed value for this argument.
+	Maximal,
+}
+
+impl<V: std::str::FromStr> std::str::FromStr for ExplicitOrMaximal<V>
+where
+	V::Err: std::fmt::Debug,
+{
+	type Err = String;
+
+	fn from_str(s: &str) -> Result<Self, Self::Err> {
+		if s.to_lowercase() == "max" {
+			return Ok(ExplicitOrMaximal::Maximal);
+		}
+
+		V::from_str(s)
+			.map(ExplicitOrMaximal::Explicit)
+			.map_err(|e| format!("Failed to parse '{:?}'. Expected 'max' or explicit value", e))
+	}
+}
+
+/// Create chain-specific set of configuration objects: connection parameters,
+/// signing parameters and bridge initialisation parameters.
+#[macro_export]
+macro_rules! declare_chain_options {
+	($chain:ident, $chain_prefix:ident) => {
+		paste::item! {
+			#[doc = $chain " connection params."]
+			#[derive(StructOpt, Debug, PartialEq, Eq)]
+			pub struct [<$chain ConnectionParams>] {
+				#[doc = "Connect to " $chain " node at given host."]
+				#[structopt(long, default_value = "127.0.0.1")]
+				pub [<$chain_prefix _host>]: String,
+				#[doc = "Connect to " $chain " node websocket server at given port."]
+				#[structopt(long)]
+				pub [<$chain_prefix _port>]: u16,
+				#[doc = "Use secure websocket connection."]
+				#[structopt(long)]
+				pub [<$chain_prefix _secure>]: bool,
+			}
+
+			#[doc = $chain " signing params."]
+			#[derive(StructOpt, Debug, PartialEq, Eq)]
+			pub struct [<$chain SigningParams>] {
+				#[doc = "The SURI of secret key to use when transactions are submitted to the " $chain " node."]
+				#[structopt(long)]
+				pub [<$chain_prefix _signer>]: String,
+				#[doc = "The password for the SURI of secret key to use when transactions are submitted to the " $chain " node."]
+				#[structopt(long)]
+				pub [<$chain_prefix _signer_password>]: Option<String>,
+			}
+
+			impl [<$chain SigningParams>] {
+				/// Parse signing params into chain-specific KeyPair.
+				pub fn to_keypair<Chain: CliChain>(&self) -> anyhow::Result<Chain::KeyPair> {
+					use sp_core::crypto::Pair;
+
+					Chain::KeyPair::from_string(
+						&self.[<$chain_prefix _signer>],
+						self.[<$chain_prefix _signer_password>].as_deref()
+					).map_err(|e| anyhow::format_err!("{:?}", e))
+				}
+			}
+
+			impl [<$chain ConnectionParams>] {
+				/// Convert connection params into Substrate client.
+				pub async fn to_client<Chain: CliChain>(
+					&self,
+				) -> anyhow::Result<relay_substrate_client::Client<Chain>> {
+					Ok(relay_substrate_client::Client::new(relay_substrate_client::ConnectionParams {
+						host: self.[<$chain_prefix _host>].clone(),
+						port: self.[<$chain_prefix _port>],
+						secure: self.[<$chain_prefix _secure>],
+					})
+					.await?
+					)
+				}
+			}
+		}
+	};
+}
+
+declare_chain_options!(Source, source);
+declare_chain_options!(Target, target);
+
+#[cfg(test)]
+mod tests {
+	use std::str::FromStr;
+
+	use super::*;
+
+	#[test]
+	fn should_format_addresses_with_ss58_format() {
+		// given
+		let rialto1 = "5sauUXUfPjmwxSgmb3tZ5d6yx24eZX4wWJ2JtVUBaQqFbvEU";
+		let rialto2 = "5rERgaT1Z8nM3et2epA5i1VtEBfp5wkhwHtVE8HK7BRbjAH2";
+		let millau1 = "752paRyW1EGfq9YLTSSqcSJ5hqnBDidBmaftGhBo8fy6ypW9";
+		let millau2 = "74GNQjmkcfstRftSQPJgMREchqHM56EvAUXRc266cZ1NYVW5";
+
+		let expected = vec![rialto1, rialto2, millau1, millau2];
+
+		// when
+		let parsed = expected
+			.iter()
+			.map(|s| AccountId::from_str(s).unwrap())
+			.collect::<Vec<_>>();
+
+		let actual = parsed.iter().map(|a| format!("{}", a)).collect::<Vec<_>>();
+
+		assert_eq!(actual, expected)
+	}
+
+	#[test]
+	fn hex_bytes_display_matches_from_str_for_clap() {
+		// given
+		let hex = HexBytes(vec![1, 2, 3, 4]);
+		let display = format!("{}", hex);
+
+		// when
+		let hex2: HexBytes = display.parse().unwrap();
+
+		// then
+		assert_eq!(hex.0, hex2.0);
+	}
+}

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

@@ -0,0 +1,110 @@
+// 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/>.
+
+use crate::cli::{PrometheusParams, SourceConnectionParams, TargetConnectionParams, TargetSigningParams};
+use crate::finality_pipeline::SubstrateFinalitySyncPipeline;
+use structopt::{clap::arg_enum, StructOpt};
+
+/// Start headers relayer process.
+#[derive(StructOpt)]
+pub struct RelayHeaders {
+	/// A bridge instance to relay headers for.
+	#[structopt(possible_values = &RelayHeadersBridge::variants(), case_insensitive = true)]
+	bridge: RelayHeadersBridge,
+	#[structopt(flatten)]
+	source: SourceConnectionParams,
+	#[structopt(flatten)]
+	target: TargetConnectionParams,
+	#[structopt(flatten)]
+	target_sign: TargetSigningParams,
+	#[structopt(flatten)]
+	prometheus_params: PrometheusParams,
+}
+
+// TODO [#851] Use kebab-case.
+arg_enum! {
+	#[derive(Debug)]
+	/// Headers relay bridge.
+	pub enum RelayHeadersBridge {
+		MillauToRialto,
+		RialtoToMillau,
+		WestendToMillau,
+		WestendToRococo,
+		RococoToWestend,
+	}
+}
+
+macro_rules! select_bridge {
+	($bridge: expr, $generic: tt) => {
+		match $bridge {
+			RelayHeadersBridge::MillauToRialto => {
+				type Source = relay_millau_client::Millau;
+				type Target = relay_rialto_client::Rialto;
+				type Finality = crate::chains::millau_headers_to_rialto::MillauFinalityToRialto;
+
+				$generic
+			}
+			RelayHeadersBridge::RialtoToMillau => {
+				type Source = relay_rialto_client::Rialto;
+				type Target = relay_millau_client::Millau;
+				type Finality = crate::chains::rialto_headers_to_millau::RialtoFinalityToMillau;
+
+				$generic
+			}
+			RelayHeadersBridge::WestendToMillau => {
+				type Source = relay_westend_client::Westend;
+				type Target = relay_millau_client::Millau;
+				type Finality = crate::chains::westend_headers_to_millau::WestendFinalityToMillau;
+
+				$generic
+			}
+			RelayHeadersBridge::WestendToRococo => {
+				type Source = relay_westend_client::Westend;
+				type Target = relay_rococo_client::Rococo;
+				type Finality = crate::chains::westend_headers_to_rococo::WestendFinalityToRococo;
+
+				$generic
+			}
+			RelayHeadersBridge::RococoToWestend => {
+				type Source = relay_rococo_client::Rococo;
+				type Target = relay_westend_client::Westend;
+				type Finality = crate::chains::rococo_headers_to_westend::RococoFinalityToWestend;
+
+				$generic
+			}
+		}
+	};
+}
+
+impl RelayHeaders {
+	/// Run the command.
+	pub async fn run(self) -> anyhow::Result<()> {
+		select_bridge!(self.bridge, {
+			let source_client = self.source.to_client::<Source>().await?;
+			let target_client = self.target.to_client::<Target>().await?;
+			let target_sign = self.target_sign.to_keypair::<Target>()?;
+			let metrics_params = Finality::customize_metrics(self.prometheus_params.into())?;
+
+			crate::finality_pipeline::run(
+				Finality::new(target_client.clone(), target_sign),
+				source_client,
+				target_client,
+				metrics_params,
+			)
+			.await
+		})
+	}
+}

polkadot/relays/bin-substrate/src/cli/relay_headers_and_messages.rs

@@ -0,0 +1,183 @@
+// 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/>.
+
+//! Complex headers+messages relays support.
+//!
+//! To add new complex relay between `ChainA` and `ChainB`, you must:
+//!
+//! 1) ensure that there's a `declare_chain_options!(...)` for both chains;
+//! 2) add `declare_bridge_options!(...)` for the bridge;
+//! 3) add bridge support to the `select_bridge! { ... }` macro.
+
+use crate::cli::{CliChain, HexLaneId, PrometheusParams};
+use crate::declare_chain_options;
+use crate::messages_lane::MessagesRelayParams;
+use crate::on_demand_headers::OnDemandHeadersRelay;
+
+use futures::{FutureExt, TryFutureExt};
+use relay_utils::metrics::MetricsParams;
+use structopt::StructOpt;
+
+/// Start headers+messages relayer process.
+#[derive(StructOpt)]
+pub enum RelayHeadersAndMessages {
+	MillauRialto(MillauRialtoHeadersAndMessages),
+}
+
+/// Parameters that have the same names across all bridges.
+#[derive(StructOpt)]
+pub struct HeadersAndMessagesSharedParams {
+	/// Hex-encoded lane id that should be served by the relay. Defaults to `00000000`.
+	#[structopt(long, default_value = "00000000")]
+	lane: HexLaneId,
+	#[structopt(flatten)]
+	prometheus_params: PrometheusParams,
+}
+
+// The reason behind this macro is that 'normal' relays are using source and target chains terminology,
+// which is unusable for both-way relays (if you're relaying headers from Rialto to Millau and from
+// Millau to Rialto, then which chain is source?).
+macro_rules! declare_bridge_options {
+	($chain1:ident, $chain2:ident) => {
+		paste::item! {
+			#[doc = $chain1 " and " $chain2 " headers+messages relay params."]
+			#[derive(StructOpt)]
+			pub struct [<$chain1 $chain2 HeadersAndMessages>] {
+				#[structopt(flatten)]
+				shared: HeadersAndMessagesSharedParams,
+				#[structopt(flatten)]
+				left: [<$chain1 ConnectionParams>],
+				#[structopt(flatten)]
+				left_sign: [<$chain1 SigningParams>],
+				#[structopt(flatten)]
+				right: [<$chain2 ConnectionParams>],
+				#[structopt(flatten)]
+				right_sign: [<$chain2 SigningParams>],
+			}
+
+			#[allow(unreachable_patterns)]
+			impl From<RelayHeadersAndMessages> for [<$chain1 $chain2 HeadersAndMessages>] {
+				fn from(relay_params: RelayHeadersAndMessages) -> [<$chain1 $chain2 HeadersAndMessages>] {
+					match relay_params {
+						RelayHeadersAndMessages::[<$chain1 $chain2>](params) => params,
+						_ => unreachable!(),
+					}
+				}
+			}
+		}
+	};
+}
+
+macro_rules! select_bridge {
+	($bridge: expr, $generic: tt) => {
+		match $bridge {
+			RelayHeadersAndMessages::MillauRialto(_) => {
+				type Params = MillauRialtoHeadersAndMessages;
+
+				type Left = relay_millau_client::Millau;
+				type Right = relay_rialto_client::Rialto;
+
+				type LeftToRightFinality = crate::chains::millau_headers_to_rialto::MillauFinalityToRialto;
+				type RightToLeftFinality = crate::chains::rialto_headers_to_millau::RialtoFinalityToMillau;
+
+				type LeftToRightMessages = crate::chains::millau_messages_to_rialto::MillauMessagesToRialto;
+				type RightToLeftMessages = crate::chains::rialto_messages_to_millau::RialtoMessagesToMillau;
+
+				use crate::chains::millau_messages_to_rialto::run as left_to_right_messages;
+				use crate::chains::rialto_messages_to_millau::run as right_to_left_messages;
+
+				$generic
+			}
+		}
+	};
+}
+
+// All supported chains.
+declare_chain_options!(Millau, millau);
+declare_chain_options!(Rialto, rialto);
+// All supported bridges.
+declare_bridge_options!(Millau, Rialto);
+
+impl RelayHeadersAndMessages {
+	/// Run the command.
+	pub async fn run(self) -> anyhow::Result<()> {
+		select_bridge!(self, {
+			let params: Params = self.into();
+
+			let left_client = params.left.to_client::<Left>().await?;
+			let left_sign = params.left_sign.to_keypair::<Left>()?;
+			let right_client = params.right.to_client::<Right>().await?;
+			let right_sign = params.right_sign.to_keypair::<Right>()?;
+
+			let lane = params.shared.lane.into();
+
+			let metrics_params: MetricsParams = params.shared.prometheus_params.into();
+			let metrics_params = relay_utils::relay_metrics(None, metrics_params).into_params();
+
+			let left_to_right_on_demand_headers = OnDemandHeadersRelay::new(
+				left_client.clone(),
+				right_client.clone(),
+				LeftToRightFinality::new(right_client.clone(), right_sign.clone()),
+			);
+			let right_to_left_on_demand_headers = OnDemandHeadersRelay::new(
+				right_client.clone(),
+				left_client.clone(),
+				RightToLeftFinality::new(left_client.clone(), left_sign.clone()),
+			);
+
+			let left_to_right_messages = left_to_right_messages(MessagesRelayParams {
+				source_client: left_client.clone(),
+				source_sign: left_sign.clone(),
+				target_client: right_client.clone(),
+				target_sign: right_sign.clone(),
+				source_to_target_headers_relay: Some(left_to_right_on_demand_headers.clone()),
+				target_to_source_headers_relay: Some(right_to_left_on_demand_headers.clone()),
+				lane_id: lane,
+				metrics_params: metrics_params
+					.clone()
+					.disable()
+					.metrics_prefix(messages_relay::message_lane_loop::metrics_prefix::<LeftToRightMessages>(&lane)),
+			})
+			.map_err(|e| anyhow::format_err!("{}", e))
+			.boxed();
+			let right_to_left_messages = right_to_left_messages(MessagesRelayParams {
+				source_client: right_client,
+				source_sign: right_sign,
+				target_client: left_client.clone(),
+				target_sign: left_sign.clone(),
+				source_to_target_headers_relay: Some(right_to_left_on_demand_headers),
+				target_to_source_headers_relay: Some(left_to_right_on_demand_headers),
+				lane_id: lane,
+				metrics_params: metrics_params
+					.clone()
+					.disable()
+					.metrics_prefix(messages_relay::message_lane_loop::metrics_prefix::<RightToLeftMessages>(&lane)),
+			})
+			.map_err(|e| anyhow::format_err!("{}", e))
+			.boxed();
+
+			relay_utils::relay_metrics(None, metrics_params)
+				.expose()
+				.await
+				.map_err(|e| anyhow::format_err!("{}", e))?;
+
+			futures::future::select(left_to_right_messages, right_to_left_messages)
+				.await
+				.factor_first()
+				.0
+		})
+	}
+}

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

@@ -0,0 +1,71 @@
+// 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/>.
+
+use crate::cli::bridge::FullBridge;
+use crate::cli::{
+	HexLaneId, PrometheusParams, SourceConnectionParams, SourceSigningParams, TargetConnectionParams,
+	TargetSigningParams,
+};
+use crate::messages_lane::MessagesRelayParams;
+use crate::select_full_bridge;
+
+use structopt::StructOpt;
+
+/// Start messages relayer process.
+#[derive(StructOpt)]
+pub struct RelayMessages {
+	/// A bridge instance to relay messages for.
+	#[structopt(possible_values = &FullBridge::variants(), case_insensitive = true)]
+	bridge: FullBridge,
+	/// Hex-encoded lane id that should be served by the relay. Defaults to `00000000`.
+	#[structopt(long, default_value = "00000000")]
+	lane: HexLaneId,
+	#[structopt(flatten)]
+	source: SourceConnectionParams,
+	#[structopt(flatten)]
+	source_sign: SourceSigningParams,
+	#[structopt(flatten)]
+	target: TargetConnectionParams,
+	#[structopt(flatten)]
+	target_sign: TargetSigningParams,
+	#[structopt(flatten)]
+	prometheus_params: PrometheusParams,
+}
+
+impl RelayMessages {
+	/// Run the command.
+	pub async fn run(self) -> anyhow::Result<()> {
+		select_full_bridge!(self.bridge, {
+			let source_client = self.source.to_client::<Source>().await?;
+			let source_sign = self.source_sign.to_keypair::<Source>()?;
+			let target_client = self.target.to_client::<Target>().await?;
+			let target_sign = self.target_sign.to_keypair::<Target>()?;
+
+			relay_messages(MessagesRelayParams {
+				source_client,
+				source_sign,
+				target_client,
+				target_sign,
+				source_to_target_headers_relay: None,
+				target_to_source_headers_relay: None,
+				lane_id: self.lane.into(),
+				metrics_params: self.prometheus_params.into(),
+			})
+			.await
+			.map_err(|e| anyhow::format_err!("{}", e))
+		})
+	}
+}

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

@@ -0,0 +1,317 @@
+// 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/>.
+
+use crate::cli::bridge::FullBridge;
+use crate::cli::encode_call::{self, CliEncodeCall};
+use crate::cli::estimate_fee::estimate_message_delivery_and_dispatch_fee;
+use crate::cli::{
+	Balance, CliChain, ExplicitOrMaximal, HexBytes, HexLaneId, Origins, SourceConnectionParams, SourceSigningParams,
+	TargetSigningParams,
+};
+use codec::Encode;
+use frame_support::{dispatch::GetDispatchInfo, weights::Weight};
+use pallet_bridge_dispatch::{CallOrigin, MessagePayload};
+use relay_substrate_client::{Chain, TransactionSignScheme};
+use sp_core::{Bytes, Pair};
+use sp_runtime::{traits::IdentifyAccount, AccountId32, MultiSignature, MultiSigner};
+use std::fmt::Debug;
+use structopt::StructOpt;
+
+/// Send bridge message.
+#[derive(StructOpt)]
+pub struct SendMessage {
+	/// A bridge instance to encode call for.
+	#[structopt(possible_values = &FullBridge::variants(), case_insensitive = true)]
+	bridge: FullBridge,
+	#[structopt(flatten)]
+	source: SourceConnectionParams,
+	#[structopt(flatten)]
+	source_sign: SourceSigningParams,
+	// TODO [#885] Move TargetSign to origins
+	#[structopt(flatten)]
+	target_sign: TargetSigningParams,
+	/// Hex-encoded lane id. Defaults to `00000000`.
+	#[structopt(long, default_value = "00000000")]
+	lane: HexLaneId,
+	/// Dispatch weight of the message. If not passed, determined automatically.
+	#[structopt(long)]
+	dispatch_weight: Option<ExplicitOrMaximal<Weight>>,
+	/// Delivery and dispatch fee in source chain base currency units. If not passed, determined automatically.
+	#[structopt(long)]
+	fee: Option<Balance>,
+	/// Message type.
+	#[structopt(subcommand)]
+	message: crate::cli::encode_call::Call,
+	/// The origin to use when dispatching the message on the target chain. Defaults to
+	/// `SourceAccount`.
+	#[structopt(long, possible_values = &Origins::variants(), default_value = "Source")]
+	origin: Origins,
+}
+
+impl SendMessage {
+	pub fn encode_payload(
+		&mut self,
+	) -> anyhow::Result<MessagePayload<AccountId32, MultiSigner, MultiSignature, Vec<u8>>> {
+		crate::select_full_bridge!(self.bridge, {
+			let SendMessage {
+				source_sign,
+				target_sign,
+				ref mut message,
+				dispatch_weight,
+				origin,
+				bridge,
+				..
+			} = self;
+
+			let source_sign = source_sign.to_keypair::<Source>()?;
+			let target_sign = target_sign.to_keypair::<Target>()?;
+
+			encode_call::preprocess_call::<Source, Target>(message, bridge.bridge_instance_index());
+			let target_call = Target::encode_call(&message)?;
+
+			let payload = {
+				let target_call_weight = prepare_call_dispatch_weight(
+					dispatch_weight,
+					ExplicitOrMaximal::Explicit(target_call.get_dispatch_info().weight),
+					compute_maximal_message_dispatch_weight(Target::max_extrinsic_weight()),
+				);
+				let source_sender_public: MultiSigner = source_sign.public().into();
+				let source_account_id = source_sender_public.into_account();
+
+				message_payload(
+					Target::RUNTIME_VERSION.spec_version,
+					target_call_weight,
+					match origin {
+						Origins::Source => CallOrigin::SourceAccount(source_account_id),
+						Origins::Target => {
+							let digest = account_ownership_digest(
+								&target_call,
+								source_account_id.clone(),
+								Target::RUNTIME_VERSION.spec_version,
+							);
+							let target_origin_public = target_sign.public();
+							let digest_signature = target_sign.sign(&digest);
+							CallOrigin::TargetAccount(
+								source_account_id,
+								target_origin_public.into(),
+								digest_signature.into(),
+							)
+						}
+					},
+					&target_call,
+				)
+			};
+			Ok(payload)
+		})
+	}
+
+	/// Run the command.
+	pub async fn run(mut self) -> anyhow::Result<()> {
+		crate::select_full_bridge!(self.bridge, {
+			let payload = self.encode_payload()?;
+
+			let source_client = self.source.to_client::<Source>().await?;
+			let source_sign = self.source_sign.to_keypair::<Source>()?;
+
+			let lane = self.lane.clone().into();
+			let fee = match self.fee {
+				Some(fee) => fee,
+				None => Balance(
+					estimate_message_delivery_and_dispatch_fee::<
+						<Source as relay_substrate_client::ChainWithBalances>::NativeBalance,
+						_,
+						_,
+					>(&source_client, ESTIMATE_MESSAGE_FEE_METHOD, lane, payload.clone())
+					.await? as _,
+				),
+			};
+			let dispatch_weight = payload.weight;
+			let send_message_call = Source::encode_call(&encode_call::Call::BridgeSendMessage {
+				bridge_instance_index: self.bridge.bridge_instance_index(),
+				lane: self.lane,
+				payload: HexBytes::encode(&payload),
+				fee,
+			})?;
+
+			source_client
+				.submit_signed_extrinsic(source_sign.public().into(), |transaction_nonce| {
+					let signed_source_call = Source::sign_transaction(
+						*source_client.genesis_hash(),
+						&source_sign,
+						transaction_nonce,
+						send_message_call,
+					)
+					.encode();
+
+					log::info!(
+						target: "bridge",
+						"Sending message to {}. Size: {}. Dispatch weight: {}. Fee: {}",
+						Target::NAME,
+						signed_source_call.len(),
+						dispatch_weight,
+						fee,
+					);
+					log::info!(
+						target: "bridge",
+						"Signed {} Call: {:?}",
+						Source::NAME,
+						HexBytes::encode(&signed_source_call)
+					);
+
+					Bytes(signed_source_call)
+				})
+				.await?;
+		});
+
+		Ok(())
+	}
+}
+
+fn prepare_call_dispatch_weight(
+	user_specified_dispatch_weight: &Option<ExplicitOrMaximal<Weight>>,
+	weight_from_pre_dispatch_call: ExplicitOrMaximal<Weight>,
+	maximal_allowed_weight: Weight,
+) -> Weight {
+	match user_specified_dispatch_weight
+		.clone()
+		.unwrap_or(weight_from_pre_dispatch_call)
+	{
+		ExplicitOrMaximal::Explicit(weight) => weight,
+		ExplicitOrMaximal::Maximal => maximal_allowed_weight,
+	}
+}
+
+pub(crate) fn message_payload<SAccountId, TPublic, TSignature>(
+	spec_version: u32,
+	weight: Weight,
+	origin: CallOrigin<SAccountId, TPublic, TSignature>,
+	call: &impl Encode,
+) -> MessagePayload<SAccountId, TPublic, TSignature, Vec<u8>>
+where
+	SAccountId: Encode + Debug,
+	TPublic: Encode + Debug,
+	TSignature: Encode + Debug,
+{
+	// Display nicely formatted call.
+	let payload = MessagePayload {
+		spec_version,
+		weight,
+		origin,
+		call: HexBytes::encode(call),
+	};
+
+	log::info!(target: "bridge", "Created Message Payload: {:#?}", payload);
+	log::info!(target: "bridge", "Encoded Message Payload: {:?}", HexBytes::encode(&payload));
+
+	// re-pack to return `Vec<u8>`
+	let MessagePayload {
+		spec_version,
+		weight,
+		origin,
+		call,
+	} = payload;
+	MessagePayload {
+		spec_version,
+		weight,
+		origin,
+		call: call.0,
+	}
+}
+
+pub(crate) fn compute_maximal_message_dispatch_weight(maximal_extrinsic_weight: Weight) -> Weight {
+	bridge_runtime_common::messages::target::maximal_incoming_message_dispatch_weight(maximal_extrinsic_weight)
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+	use hex_literal::hex;
+
+	#[test]
+	fn send_remark_rialto_to_millau() {
+		// given
+		let mut send_message = SendMessage::from_iter(vec![
+			"send-message",
+			"RialtoToMillau",
+			"--source-port",
+			"1234",
+			"--source-signer",
+			"//Alice",
+			"--target-signer",
+			"//Bob",
+			"remark",
+			"--remark-payload",
+			"1234",
+		]);
+
+		// when
+		let payload = send_message.encode_payload().unwrap();
+
+		// then
+		assert_eq!(
+			payload,
+			MessagePayload {
+				spec_version: relay_millau_client::Millau::RUNTIME_VERSION.spec_version,
+				weight: 1345000,
+				origin: CallOrigin::SourceAccount(sp_keyring::AccountKeyring::Alice.to_account_id()),
+				call: hex!("0401081234").to_vec(),
+			}
+		);
+	}
+
+	#[test]
+	fn send_remark_millau_to_rialto() {
+		// given
+		let mut send_message = SendMessage::from_iter(vec![
+			"send-message",
+			"MillauToRialto",
+			"--source-port",
+			"1234",
+			"--source-signer",
+			"//Alice",
+			"--origin",
+			"Target",
+			"--target-signer",
+			"//Bob",
+			"remark",
+			"--remark-payload",
+			"1234",
+		]);
+
+		// when
+		let payload = send_message.encode_payload().unwrap();
+
+		// then
+		// Since signatures are randomized we extract it from here and only check the rest.
+		let signature = match payload.origin {
+			CallOrigin::TargetAccount(_, _, ref sig) => sig.clone(),
+			_ => panic!("Unexpected `CallOrigin`: {:?}", payload),
+		};
+		assert_eq!(
+			payload,
+			MessagePayload {
+				spec_version: relay_millau_client::Millau::RUNTIME_VERSION.spec_version,
+				weight: 1345000,
+				origin: CallOrigin::TargetAccount(
+					sp_keyring::AccountKeyring::Alice.to_account_id(),
+					sp_keyring::AccountKeyring::Bob.into(),
+					signature,
+				),
+				call: hex!("0701081234").to_vec(),
+			}
+		);
+	}
+}