Newer
Older
// 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 bp_runtime::Chain as ChainBase;
use frame_support::Parameter;
use jsonrpsee_ws_client::{DeserializeOwned, Serialize};
use num_traits::{Bounded, CheckedSub, SaturatingAdd, Zero};
use sp_core::{storage::StorageKey, Pair};
use sp_runtime::{
generic::SignedBlock,
![Svyatoslav Nikolsky Svyatoslav Nikolsky's avatar](/assets/no_avatar-849f9c04a3a0d0cea2424ae97b27447dc64a7dbfae83c036c45b403392f0e8ba.png)
Svyatoslav Nikolsky
committed
traits::{
AtLeast32Bit, AtLeast32BitUnsigned, Block as BlockT, Dispatchable, MaybeDisplay, MaybeSerialize,
MaybeSerializeDeserialize, Member,
![Svyatoslav Nikolsky Svyatoslav Nikolsky's avatar](/assets/no_avatar-849f9c04a3a0d0cea2424ae97b27447dc64a7dbfae83c036c45b403392f0e8ba.png)
Svyatoslav Nikolsky
committed
},
EncodedJustification, FixedPointOperand,
use std::{fmt::Debug, time::Duration};
/// Substrate-based chain from minimal relay-client point of view.
![Svyatoslav Nikolsky Svyatoslav Nikolsky's avatar](/assets/no_avatar-849f9c04a3a0d0cea2424ae97b27447dc64a7dbfae83c036c45b403392f0e8ba.png)
Svyatoslav Nikolsky
committed
pub trait Chain: ChainBase + Clone {
/// Chain name.
const NAME: &'static str;
/// Average block interval.
///
/// How often blocks are produced on that chain. It's suggested to set this value
/// to match the block time of the chain.
const AVERAGE_BLOCK_INTERVAL: Duration;
/// Maximal expected storage proof overhead (in bytes).
const STORAGE_PROOF_OVERHEAD: u32;
/// Maximal size (in bytes) of SCALE-encoded account id on this chain.
const MAXIMAL_ENCODED_ACCOUNT_ID_SIZE: u32;
/// The user account identifier type for the runtime.
type AccountId: Parameter + Member + MaybeSerializeDeserialize + Debug + MaybeDisplay + Ord + Default;
/// Index of a transaction used by the chain.
type Index: Parameter
+ Member
+ MaybeSerialize
+ Debug
+ Default
+ MaybeDisplay
+ DeserializeOwned
+ AtLeast32Bit
+ Copy;
/// Block type.
![Svyatoslav Nikolsky Svyatoslav Nikolsky's avatar](/assets/no_avatar-849f9c04a3a0d0cea2424ae97b27447dc64a7dbfae83c036c45b403392f0e8ba.png)
Svyatoslav Nikolsky
committed
type SignedBlock: Member + Serialize + DeserializeOwned + BlockWithJustification<Self::Header>;
/// The aggregated `Call` type.
type Call: Dispatchable + Debug;
/// Balance of an account in native tokens.
///
/// The chain may support multiple tokens, but this particular type is for token that is used
/// to pay for transaction dispatch, to reward different relayers (headers, messages), etc.
type Balance: AtLeast32BitUnsigned
+ FixedPointOperand
+ Parameter
+ Parameter
+ Member
+ DeserializeOwned
+ Clone
+ Copy
+ Bounded
+ CheckedSub
+ PartialOrd
+ SaturatingAdd
+ Zero
+ std::convert::TryFrom<sp_core::U256>;
/// Substrate-based chain with `frame_system::Config::AccountData` set to
/// the `pallet_balances::AccountData<Balance>`.
pub trait ChainWithBalances: Chain {
/// Return runtime storage key for getting `frame_system::AccountInfo` of given account.
fn account_info_storage_key(account_id: &Self::AccountId) -> StorageKey;
}
![Svyatoslav Nikolsky Svyatoslav Nikolsky's avatar](/assets/no_avatar-849f9c04a3a0d0cea2424ae97b27447dc64a7dbfae83c036c45b403392f0e8ba.png)
Svyatoslav Nikolsky
committed
pub trait BlockWithJustification<Header> {
/// Return block header.
fn header(&self) -> Header;
/// Return block justification, if known.
fn justification(&self) -> Option<&EncodedJustification>;
/// Substrate-based chain transactions signing scheme.
pub trait TransactionSignScheme {
/// Chain that this scheme is to be used.
type Chain: Chain;
/// Type of key pairs used to sign transactions.
type AccountKeyPair: Pair;
/// Signed transaction.
type SignedTransaction;
/// Create transaction for given runtime call, signed by given account.
fn sign_transaction(
genesis_hash: <Self::Chain as ChainBase>::Hash,
signer: &Self::AccountKeyPair,
signer_nonce: <Self::Chain as Chain>::Index,
call: <Self::Chain as Chain>::Call,
) -> Self::SignedTransaction;
}
![Svyatoslav Nikolsky Svyatoslav Nikolsky's avatar](/assets/no_avatar-849f9c04a3a0d0cea2424ae97b27447dc64a7dbfae83c036c45b403392f0e8ba.png)
Svyatoslav Nikolsky
committed
impl<Block: BlockT> BlockWithJustification<Block::Header> for SignedBlock<Block> {
fn header(&self) -> Block::Header {
self.block.header().clone()
fn justification(&self) -> Option<&EncodedJustification> {
self.justifications
.as_ref()
.and_then(|j| j.get(sp_finality_grandpa::GRANDPA_ENGINE_ID))