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// 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/>.
#![cfg_attr(not(feature = "std"), no_std)]
// RuntimeApi generated functions
#![allow(clippy::too_many_arguments)]
// Runtime-generated DecodeLimit::decode_all_with_depth_limit
#![allow(clippy::unnecessary_mut_passed)]
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use bp_messages::{LaneId, MessageDetails, MessageNonce, UnrewardedRelayersState};
use frame_support::weights::{
WeightToFeeCoefficient, WeightToFeeCoefficients, WeightToFeePolynomial,
};
pub use bp_polkadot_core::*;
/// Westend Chain
pub type Westend = PolkadotLike;
// NOTE: This needs to be kept up to date with the Westend runtime found in the Polkadot repo.
pub struct WeightToFee;
impl WeightToFeePolynomial for WeightToFee {
type Balance = Balance;
fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
const CENTS: Balance = 1_000_000_000_000 / 1_000;
// in Westend, extrinsic base weight (smallest non-zero weight) is mapped to 1/10 CENT:
let p = CENTS;
let q = 10 * Balance::from(ExtrinsicBaseWeight::get());
smallvec::smallvec![WeightToFeeCoefficient {
degree: 1,
negative: false,
coeff_frac: Perbill::from_rational(p % q, q),
coeff_integer: p / q,
}]
}
}
// NOTE: This needs to be kept up to date with the Westend runtime found in the Polkadot repo.
pub const VERSION: RuntimeVersion = RuntimeVersion {
spec_name: sp_version::create_runtime_str!("westend"),
impl_name: sp_version::create_runtime_str!("parity-westend"),
authoring_version: 2,
impl_version: 0,
apis: sp_version::create_apis_vec![[]],
transaction_version: 5,
};
/// Westend Runtime `Call` enum.
///
/// We are not currently submitting any Westend transactions => it is empty.
#[derive(
parity_scale_codec::Encode, parity_scale_codec::Decode, Debug, PartialEq, Eq, Clone, TypeInfo,
)]
pub enum Call {}
impl sp_runtime::traits::Dispatchable for Call {
type Origin = ();
type Config = ();
type Info = ();
type PostInfo = ();
fn dispatch(self, _origin: Self::Origin) -> sp_runtime::DispatchResultWithInfo<Self::PostInfo> {
unimplemented!("The Call is not expected to be dispatched.")
}
}
// We use this to get the account on Westend (target) which is derived from Rococo's (source)
// account.
pub fn derive_account_from_rococo_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {
let encoded_id = bp_runtime::derive_account_id(bp_runtime::ROCOCO_CHAIN_ID, id);
AccountIdConverter::convert(encoded_id)
}
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/// Name of the With-Westend GRANDPA pallet instance that is deployed at bridged chains.
pub const WITH_WESTEND_GRANDPA_PALLET_NAME: &str = "BridgeWestendGrandpa";
/// Name of the `WestendFinalityApi::best_finalized` runtime method.
pub const BEST_FINALIZED_WESTEND_HEADER_METHOD: &str = "WestendFinalityApi_best_finalized";
/// The target length of a session (how often authorities change) on Westend measured in of number
/// of blocks.
///
/// Note that since this is a target sessions may change before/after this time depending on network
/// conditions.
pub const SESSION_LENGTH: BlockNumber = 10 * time_units::MINUTES;
sp_api::decl_runtime_apis! {
/// API for querying information about the finalized Westend headers.
///
/// This API is implemented by runtimes that are bridging with the Westend chain, not the
/// Westend runtime itself.
pub trait WestendFinalityApi {
/// Returns number and hash of the best finalized header known to the bridge module.
fn best_finalized() -> (BlockNumber, Hash);
}
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/// Outbound message lane API for messages that are sent to Westend chain.
///
/// This API is implemented by runtimes that are sending messages to Westend chain, not the
/// Westend runtime itself.
pub trait ToWestendOutboundLaneApi<OutboundMessageFee: Parameter, OutboundPayload: Parameter> {
/// Estimate message delivery and dispatch fee that needs to be paid by the sender on
/// this chain.
///
/// Returns `None` if message is too expensive to be sent to Westend from this chain.
///
/// Please keep in mind that this method returns the lowest message fee required for message
/// to be accepted to the lane. It may be good idea to pay a bit over this price to account
/// future exchange rate changes and guarantee that relayer would deliver your message
/// to the target chain.
fn estimate_message_delivery_and_dispatch_fee(
lane_id: LaneId,
payload: OutboundPayload,
) -> Option<OutboundMessageFee>;
/// Returns dispatch weight, encoded payload size and delivery+dispatch fee of all
/// messages in given inclusive range.
///
/// If some (or all) messages are missing from the storage, they'll also will
/// be missing from the resulting vector. The vector is ordered by the nonce.
fn message_details(
lane: LaneId,
begin: MessageNonce,
end: MessageNonce,
) -> Vec<MessageDetails<OutboundMessageFee>>;
/// Returns nonce of the latest message, received by bridged chain.
fn latest_received_nonce(lane: LaneId) -> MessageNonce;
/// Returns nonce of the latest message, generated by given lane.
fn latest_generated_nonce(lane: LaneId) -> MessageNonce;
}
/// Inbound message lane API for messages sent by Westend chain.
///
/// This API is implemented by runtimes that are receiving messages from Westend chain, not the
/// Westend runtime itself.
pub trait FromWestendInboundLaneApi {
/// Returns nonce of the latest message, received by given lane.
fn latest_received_nonce(lane: LaneId) -> MessageNonce;
/// Nonce of the latest message that has been confirmed to the bridged chain.
fn latest_confirmed_nonce(lane: LaneId) -> MessageNonce;
/// State of the unrewarded relayers set at given lane.
fn unrewarded_relayers_state(lane: LaneId) -> UnrewardedRelayersState;
}