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// Copyright 2019-2022 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/>.
use async_trait::async_trait;
use std::sync::Arc;
use crate::cli::{
bridge::{
CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge,
RelayToRelayHeadersCliBridge,
},
relay_headers_and_messages::{Full2WayBridgeBase, Full2WayBridgeCommonParams},
CliChain,
};
use bp_polkadot_core::parachains::ParaHash;
use bp_runtime::BlockNumberOf;
use pallet_bridge_parachains::{RelayBlockHash, RelayBlockHasher, RelayBlockNumber};
use relay_substrate_client::{AccountIdOf, AccountKeyPairOf, Chain, ChainWithTransactions, Client};
use sp_core::Pair;
use substrate_relay_helper::{
finality::SubstrateFinalitySyncPipeline,
on_demand::{
headers::OnDemandHeadersRelay, parachains::OnDemandParachainsRelay, OnDemandRelay,
},
TaggedAccount, TransactionParams,
};
/// A base relay between standalone (relay) chain and a parachain from another consensus system.
///
/// Such relay starts 2 messages relay. It also starts 2 on-demand header relays and 1 on-demand
/// parachain heads relay.
pub struct RelayToParachainBridge<
L2R: MessagesCliBridge + RelayToRelayHeadersCliBridge,
R2L: MessagesCliBridge + ParachainToRelayHeadersCliBridge,
> {
/// Parameters that are shared by all bridge types.
pub common:
Full2WayBridgeCommonParams<<R2L as CliBridgeBase>::Target, <L2R as CliBridgeBase>::Target>,
/// Client of the right relay chain.
pub right_relay: Client<<R2L as ParachainToRelayHeadersCliBridge>::SourceRelay>,
/// Override for right_relay->left headers signer.
pub right_headers_to_left_transaction_params:
TransactionParams<AccountKeyPairOf<<R2L as CliBridgeBase>::Target>>,
/// Override for right->left parachains signer.
pub right_parachains_to_left_transaction_params:
TransactionParams<AccountKeyPairOf<<R2L as CliBridgeBase>::Target>>,
/// Override for left->right headers signer.
pub left_headers_to_right_transaction_params:
TransactionParams<AccountKeyPairOf<<L2R as CliBridgeBase>::Target>>,
}
macro_rules! declare_relay_to_parachain_bridge_schema {
// chain, parachain, relay-chain-of-parachain
($left_chain:ident, $right_parachain:ident, $right_chain:ident) => {
Branislav Kontur
committed
bp_runtime::paste::item! {
#[doc = $left_chain ", " $right_parachain " and " $right_chain " headers+parachains+messages relay params."]
#[derive(Debug, PartialEq, StructOpt)]
pub struct [<$left_chain $right_parachain HeadersAndMessages>] {
#[structopt(flatten)]
shared: HeadersAndMessagesSharedParams,
#[structopt(flatten)]
left: [<$left_chain ConnectionParams>],
// default signer, which is always used to sign messages relay transactions on the left chain
#[structopt(flatten)]
left_sign: [<$left_chain SigningParams>],
// signer used to sign parameter update transactions at the left chain
#[structopt(flatten)]
left_messages_pallet_owner: [<$left_chain MessagesPalletOwnerSigningParams>],
#[structopt(flatten)]
right: [<$right_parachain ConnectionParams>],
#[structopt(flatten)]
right_relay: [<$right_chain ConnectionParams>],
// default signer, which is always used to sign messages relay transactions on the right chain
#[structopt(flatten)]
right_sign: [<$right_parachain SigningParams>],
// signer used to sign parameter update transactions at the left chain
#[structopt(flatten)]
right_messages_pallet_owner: [<$right_parachain MessagesPalletOwnerSigningParams>],
// override for right_relay->left headers signer
#[structopt(flatten)]
right_relay_headers_to_left_sign_override: [<$right_chain HeadersTo $left_chain SigningParams>],
// override for left->right headers signer
#[structopt(flatten)]
left_headers_to_right_sign_override: [<$left_chain HeadersTo $right_parachain SigningParams>],
// override for right->left parachains signer
right_parachains_to_left_sign_override: [<$right_chain ParachainsTo $left_chain SigningParams>],
}
impl [<$left_chain $right_parachain HeadersAndMessages>] {
async fn into_bridge<
Left: ChainWithTransactions + CliChain<KeyPair = AccountKeyPairOf<Left>>,
Right: ChainWithTransactions + CliChain<KeyPair = AccountKeyPairOf<Right>>,
RightRelay: CliChain,
L2R: CliBridgeBase<Source = Left, Target = Right> + MessagesCliBridge + RelayToRelayHeadersCliBridge,
R2L: CliBridgeBase<Source = Right, Target = Left>
+ MessagesCliBridge
+ ParachainToRelayHeadersCliBridge<SourceRelay = RightRelay>,
>(
self,
) -> anyhow::Result<RelayToParachainBridge<L2R, R2L>> {
Ok(RelayToParachainBridge {
common: Full2WayBridgeCommonParams::new::<L2R>(
self.shared,
BridgeEndCommonParams {
client: self.left.into_client::<Left>().await?,
sign: self.left_sign.to_keypair::<Left>()?,
transactions_mortality: self.left_sign.transactions_mortality()?,
messages_pallet_owner: self.left_messages_pallet_owner.to_keypair::<Left>()?,
accounts: vec![],
},
BridgeEndCommonParams {
client: self.right.into_client::<Right>().await?,
sign: self.right_sign.to_keypair::<Right>()?,
transactions_mortality: self.right_sign.transactions_mortality()?,
messages_pallet_owner: self.right_messages_pallet_owner.to_keypair::<Right>()?,
accounts: vec![],
},
)?,
right_relay: self.right_relay.into_client::<RightRelay>().await?,
right_headers_to_left_transaction_params: self
.right_relay_headers_to_left_sign_override
.transaction_params_or::<Left, _>(
&self.left_sign,
)?,
right_parachains_to_left_transaction_params: self
.right_parachains_to_left_sign_override
.transaction_params_or::<Left, _>(
&self.left_sign,
)?,
left_headers_to_right_transaction_params: self
.left_headers_to_right_sign_override
.transaction_params_or::<Right, _>(&self.right_sign)?,
})
}
}
}
};
}
#[async_trait]
impl<
Left: ChainWithTransactions + CliChain<KeyPair = AccountKeyPairOf<Left>>,
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+ CliChain<KeyPair = AccountKeyPairOf<Right>>,
RightRelay: Chain<BlockNumber = RelayBlockNumber, Hash = RelayBlockHash, Hasher = RelayBlockHasher>
+ CliChain,
L2R: CliBridgeBase<Source = Left, Target = Right>
+ MessagesCliBridge
+ RelayToRelayHeadersCliBridge,
R2L: CliBridgeBase<Source = Right, Target = Left>
+ MessagesCliBridge
+ ParachainToRelayHeadersCliBridge<SourceRelay = RightRelay>,
> Full2WayBridgeBase for RelayToParachainBridge<L2R, R2L>
where
AccountIdOf<Left>: From<<AccountKeyPairOf<Left> as Pair>::Public>,
AccountIdOf<Right>: From<<AccountKeyPairOf<Right> as Pair>::Public>,
{
type Params = RelayToParachainBridge<L2R, R2L>;
type Left = Left;
type Right = Right;
fn common(&self) -> &Full2WayBridgeCommonParams<Left, Right> {
&self.common
}
fn mut_common(&mut self) -> &mut Full2WayBridgeCommonParams<Self::Left, Self::Right> {
&mut self.common
}
async fn start_on_demand_headers_relayers(
&mut self,
) -> anyhow::Result<(
Arc<dyn OnDemandRelay<BlockNumberOf<Self::Left>>>,
Arc<dyn OnDemandRelay<BlockNumberOf<Self::Right>>>,
)> {
self.common.left.accounts.push(TaggedAccount::Headers {
id: self.right_headers_to_left_transaction_params.signer.public().into(),
bridged_chain: RightRelay::NAME.to_string(),
});
self.common.left.accounts.push(TaggedAccount::Parachains {
id: self.right_parachains_to_left_transaction_params.signer.public().into(),
bridged_chain: RightRelay::NAME.to_string(),
});
self.common.right.accounts.push(TaggedAccount::Headers {
id: self.left_headers_to_right_transaction_params.signer.public().into(),
bridged_chain: Left::NAME.to_string(),
});
<L2R as RelayToRelayHeadersCliBridge>::Finality::start_relay_guards(
&self.common.right.client,
self.common.right.client.can_start_version_guard(),
)
.await?;
<R2L as ParachainToRelayHeadersCliBridge>::RelayFinality::start_relay_guards(
&self.common.left.client,
self.common.left.client.can_start_version_guard(),
)
.await?;
let left_to_right_on_demand_headers =
OnDemandHeadersRelay::new::<<L2R as RelayToRelayHeadersCliBridge>::Finality>(
self.common.left.client.clone(),
self.common.right.client.clone(),
self.left_headers_to_right_transaction_params.clone(),
self.common.shared.only_mandatory_headers,
);
let right_relay_to_left_on_demand_headers =
OnDemandHeadersRelay::new::<<R2L as ParachainToRelayHeadersCliBridge>::RelayFinality>(
self.right_relay.clone(),
self.common.left.client.clone(),
self.right_headers_to_left_transaction_params.clone(),
self.common.shared.only_mandatory_headers,
);
let right_to_left_on_demand_parachains = OnDemandParachainsRelay::new::<
<R2L as ParachainToRelayHeadersCliBridge>::ParachainFinality,
>(
self.right_relay.clone(),
self.common.left.client.clone(),