pezkuwi-subxt/bridges/bin/millau/runtime/src/lib.rs

// Copyright 2019-2020 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/>.

//! The Millau runtime. This can be compiled with `#[no_std]`, ready for Wasm.

#![cfg_attr(not(feature = "std"), no_std)]
// `construct_runtime!` does a lot of recursion and requires us to increase the limit to 256.
#![recursion_limit = "256"]
// Runtime-generated enums
#![allow(clippy::large_enum_variant)]
// Runtime-generated DecodeLimit::decode_all_With_depth_limit
#![allow(clippy::unnecessary_mut_passed)]

// Make the WASM binary available.
#[cfg(feature = "std")]
include!(concat!(env!("OUT_DIR"), "/wasm_binary.rs"));

pub mod rialto;
pub mod rialto_messages;

use pallet_grandpa::{fg_primitives, AuthorityId as GrandpaId, AuthorityList as GrandpaAuthorityList};
use sp_api::impl_runtime_apis;
use sp_consensus_aura::sr25519::AuthorityId as AuraId;
use sp_core::{crypto::KeyTypeId, OpaqueMetadata};
use sp_runtime::traits::{Block as BlockT, IdentityLookup, NumberFor, OpaqueKeys};
use sp_runtime::{
	create_runtime_str, generic, impl_opaque_keys,
	transaction_validity::{TransactionSource, TransactionValidity},
	ApplyExtrinsicResult, MultiSignature, MultiSigner,
};
use sp_std::prelude::*;
#[cfg(feature = "std")]
use sp_version::NativeVersion;
use sp_version::RuntimeVersion;

// A few exports that help ease life for downstream crates.
pub use frame_support::{
	construct_runtime, parameter_types,
	traits::{Currency, ExistenceRequirement, Imbalance, KeyOwnerProofSystem, Randomness},
	weights::{IdentityFee, RuntimeDbWeight, Weight},
	StorageValue,
};

pub use pallet_balances::Call as BalancesCall;
pub use pallet_message_lane::Call as MessageLaneCall;
pub use pallet_substrate_bridge::Call as BridgeSubstrateCall;
pub use pallet_timestamp::Call as TimestampCall;

#[cfg(any(feature = "std", test))]
pub use sp_runtime::BuildStorage;
pub use sp_runtime::{Perbill, Permill};

/// An index to a block.
pub type BlockNumber = bp_millau::BlockNumber;

/// Alias to 512-bit hash when used in the context of a transaction signature on the chain.
pub type Signature = bp_millau::Signature;

/// Some way of identifying an account on the chain. We intentionally make it equivalent
/// to the public key of our transaction signing scheme.
pub type AccountId = bp_millau::AccountId;

/// The type for looking up accounts. We don't expect more than 4 billion of them, but you
/// never know...
pub type AccountIndex = u32;

/// Balance of an account.
pub type Balance = bp_millau::Balance;

/// Index of a transaction in the chain.
pub type Index = u32;

/// A hash of some data used by the chain.
pub type Hash = bp_millau::Hash;

/// Hashing algorithm used by the chain.
pub type Hashing = bp_millau::Hasher;

/// Digest item type.
pub type DigestItem = generic::DigestItem<Hash>;

/// Opaque types. These are used by the CLI to instantiate machinery that don't need to know
/// the specifics of the runtime. They can then be made to be agnostic over specific formats
/// of data like extrinsics, allowing for them to continue syncing the network through upgrades
/// to even the core data structures.
pub mod opaque {
	use super::*;

	pub use sp_runtime::OpaqueExtrinsic as UncheckedExtrinsic;

	/// Opaque block header type.
	pub type Header = generic::Header<BlockNumber, Hashing>;
	/// Opaque block type.
	pub type Block = generic::Block<Header, UncheckedExtrinsic>;
	/// Opaque block identifier type.
	pub type BlockId = generic::BlockId<Block>;
}

impl_opaque_keys! {
	pub struct SessionKeys {
		pub aura: Aura,
		pub grandpa: Grandpa,
	}
}

/// This runtime version.
pub const VERSION: RuntimeVersion = RuntimeVersion {
	spec_name: create_runtime_str!("millau-runtime"),
	impl_name: create_runtime_str!("millau-runtime"),
	authoring_version: 1,
	spec_version: 1,
	impl_version: 1,
	apis: RUNTIME_API_VERSIONS,
	transaction_version: 1,
};

pub const MILLISECS_PER_BLOCK: u64 = 6000;

pub const SLOT_DURATION: u64 = MILLISECS_PER_BLOCK;

// These time units are defined in number of blocks.
pub const MINUTES: BlockNumber = 60_000 / (MILLISECS_PER_BLOCK as BlockNumber);
pub const HOURS: BlockNumber = MINUTES * 60;
pub const DAYS: BlockNumber = HOURS * 24;

/// The version information used to identify this runtime when compiled natively.
#[cfg(feature = "std")]
pub fn native_version() -> NativeVersion {
	NativeVersion {
		runtime_version: VERSION,
		can_author_with: Default::default(),
	}
}

parameter_types! {
	pub const BlockHashCount: BlockNumber = 250;
	pub const MaximumBlockWeight: Weight = bp_millau::MAXIMUM_BLOCK_WEIGHT;
	pub const ExtrinsicBaseWeight: Weight = 10_000_000;
	pub const AvailableBlockRatio: Perbill = Perbill::from_percent(bp_millau::AVAILABLE_BLOCK_RATIO);
	pub MaximumExtrinsicWeight: Weight = bp_millau::MAXIMUM_EXTRINSIC_WEIGHT;
	pub const MaximumBlockLength: u32 = 5 * 1024 * 1024;
	pub const Version: RuntimeVersion = VERSION;
	pub const DbWeight: RuntimeDbWeight = RuntimeDbWeight {
		read: 60_000_000, // ~0.06 ms = ~60 µs
		write: 200_000_000, // ~0.2 ms = 200 µs
	};
}

impl frame_system::Trait for Runtime {
	/// The basic call filter to use in dispatchable.
	type BaseCallFilter = ();
	/// The identifier used to distinguish between accounts.
	type AccountId = AccountId;
	/// The aggregated dispatch type that is available for extrinsics.
	type Call = Call;
	/// The lookup mechanism to get account ID from whatever is passed in dispatchers.
	type Lookup = IdentityLookup<AccountId>;
	/// The index type for storing how many extrinsics an account has signed.
	type Index = Index;
	/// The index type for blocks.
	type BlockNumber = BlockNumber;
	/// The type for hashing blocks and tries.
	type Hash = Hash;
	/// The hashing algorithm used.
	type Hashing = Hashing;
	/// The header type.
	type Header = generic::Header<BlockNumber, Hashing>;
	/// The ubiquitous event type.
	type Event = Event;
	/// The ubiquitous origin type.
	type Origin = Origin;
	/// Maximum number of block number to block hash mappings to keep (oldest pruned first).
	type BlockHashCount = BlockHashCount;
	/// Maximum weight of each block.
	type MaximumBlockWeight = MaximumBlockWeight;
	/// The weight of database operations that the runtime can invoke.
	type DbWeight = DbWeight;
	/// The weight of the overhead invoked on the block import process, independent of the
	/// extrinsics included in that block.
	type BlockExecutionWeight = ();
	/// The base weight of any extrinsic processed by the runtime, independent of the
	/// logic of that extrinsic. (Signature verification, nonce increment, fee, etc...)
	type ExtrinsicBaseWeight = ExtrinsicBaseWeight;
	/// The maximum weight that a single extrinsic of `Normal` dispatch class can have,
	/// idependent of the logic of that extrinsics. (Roughly max block weight - average on
	/// initialize cost).
	type MaximumExtrinsicWeight = MaximumExtrinsicWeight;
	/// Maximum size of all encoded transactions (in bytes) that are allowed in one block.
	type MaximumBlockLength = MaximumBlockLength;
	/// Portion of the block weight that is available to all normal transactions.
	type AvailableBlockRatio = AvailableBlockRatio;
	/// Version of the runtime.
	type Version = Version;
	/// Provides information about the pallet setup in the runtime.
	type PalletInfo = PalletInfo;
	/// What to do if a new account is created.
	type OnNewAccount = ();
	/// What to do if an account is fully reaped from the system.
	type OnKilledAccount = ();
	/// The data to be stored in an account.
	type AccountData = pallet_balances::AccountData<Balance>;
	// TODO: update me (https://github.com/paritytech/parity-bridges-common/issues/78)
	/// Weight information for the extrinsics of this pallet.
	type SystemWeightInfo = ();
}

impl pallet_aura::Trait for Runtime {
	type AuthorityId = AuraId;
}
impl pallet_bridge_call_dispatch::Trait for Runtime {
	type Event = Event;
	type MessageId = (bp_message_lane::LaneId, bp_message_lane::MessageNonce);
	type Call = Call;
	type SourceChainAccountPublic = MultiSigner;
	type TargetChainAccountPublic = MultiSigner;
	type TargetChainSignature = MultiSignature;
}

impl pallet_grandpa::Trait for Runtime {
	type Event = Event;
	type Call = Call;
	type KeyOwnerProofSystem = ();
	type KeyOwnerProof = <Self::KeyOwnerProofSystem as KeyOwnerProofSystem<(KeyTypeId, GrandpaId)>>::Proof;
	type KeyOwnerIdentification =
		<Self::KeyOwnerProofSystem as KeyOwnerProofSystem<(KeyTypeId, GrandpaId)>>::IdentificationTuple;
	type HandleEquivocation = ();
	// TODO: update me (https://github.com/paritytech/parity-bridges-common/issues/78)
	type WeightInfo = ();
}

parameter_types! {
	pub const MinimumPeriod: u64 = SLOT_DURATION / 2;
}

impl pallet_timestamp::Trait for Runtime {
	/// A timestamp: milliseconds since the unix epoch.
	type Moment = u64;
	type OnTimestampSet = Aura;
	type MinimumPeriod = MinimumPeriod;
	// TODO: update me (https://github.com/paritytech/parity-bridges-common/issues/78)
	type WeightInfo = ();
}

parameter_types! {
	pub const ExistentialDeposit: u128 = 500;
	// For weight estimation, we assume that the most locks on an individual account will be 50.
	// This number may need to be adjusted in the future if this assumption no longer holds true.
	pub const MaxLocks: u32 = 50;
}

impl pallet_balances::Trait for Runtime {
	/// The type for recording an account's balance.
	type Balance = Balance;
	/// The ubiquitous event type.
	type Event = Event;
	type DustRemoval = ();
	type ExistentialDeposit = ExistentialDeposit;
	type AccountStore = System;
	// TODO: update me (https://github.com/paritytech/parity-bridges-common/issues/78)
	type WeightInfo = ();
	type MaxLocks = MaxLocks;
}

parameter_types! {
	pub const TransactionBaseFee: Balance = 0;
	pub const TransactionByteFee: Balance = 1;
}

impl pallet_transaction_payment::Trait for Runtime {
	type Currency = pallet_balances::Module<Runtime>;
	type OnTransactionPayment = ();
	type TransactionByteFee = TransactionByteFee;
	type WeightToFee = IdentityFee<Balance>;
	type FeeMultiplierUpdate = ();
}

impl pallet_sudo::Trait for Runtime {
	type Event = Event;
	type Call = Call;
}

parameter_types! {
	/// Authorities are changing every 5 minutes.
	pub const Period: BlockNumber = 5 * MINUTES;
	pub const Offset: BlockNumber = 0;
}

impl pallet_session::Trait for Runtime {
	type Event = Event;
	type ValidatorId = <Self as frame_system::Trait>::AccountId;
	type ValidatorIdOf = ();
	type ShouldEndSession = pallet_session::PeriodicSessions<Period, Offset>;
	type NextSessionRotation = pallet_session::PeriodicSessions<Period, Offset>;
	type SessionManager = pallet_shift_session_manager::Module<Runtime>;
	type SessionHandler = <SessionKeys as OpaqueKeys>::KeyTypeIdProviders;
	type Keys = SessionKeys;
	type DisabledValidatorsThreshold = ();
	// TODO: update me (https://github.com/paritytech/parity-bridges-common/issues/78)
	type WeightInfo = ();
}

impl pallet_substrate_bridge::Trait for Runtime {
	type BridgedChain = bp_rialto::Rialto;
}

impl pallet_shift_session_manager::Trait for Runtime {}

parameter_types! {
	pub const MaxMessagesToPruneAtOnce: bp_message_lane::MessageNonce = 8;
	pub const MaxUnconfirmedMessagesAtInboundLane: bp_message_lane::MessageNonce = 128;
}

impl pallet_message_lane::Trait for Runtime {
	type Event = Event;
	type MaxMessagesToPruneAtOnce = MaxMessagesToPruneAtOnce;
	type MaxUnconfirmedMessagesAtInboundLane = MaxUnconfirmedMessagesAtInboundLane;

	type OutboundPayload = crate::rialto_messages::ToRialtoMessagePayload;
	type OutboundMessageFee = Balance;

	type InboundPayload = crate::rialto_messages::FromRialtoMessagePayload;
	type InboundMessageFee = bp_rialto::Balance;
	type InboundRelayer = bp_rialto::AccountId;

	type TargetHeaderChain = crate::rialto_messages::Rialto;
	type LaneMessageVerifier = crate::rialto_messages::ToRialtoMessageVerifier;
	type MessageDeliveryAndDispatchPayment =
		pallet_message_lane::instant_payments::InstantCurrencyPayments<AccountId, pallet_balances::Module<Runtime>>;

	type SourceHeaderChain = crate::rialto_messages::Rialto;
	type MessageDispatch = crate::rialto_messages::FromRialtoMessageDispatch;
}

construct_runtime!(
	pub enum Runtime where
		Block = Block,
		NodeBlock = opaque::Block,
		UncheckedExtrinsic = UncheckedExtrinsic
	{
		BridgeRialto: pallet_substrate_bridge::{Module, Call, Storage, Config<T>},
		BridgeRialtoMessageLane: pallet_message_lane::{Module, Call, Event<T>},
		BridgeCallDispatch: pallet_bridge_call_dispatch::{Module, Event<T>},
		System: frame_system::{Module, Call, Config, Storage, Event<T>},
		RandomnessCollectiveFlip: pallet_randomness_collective_flip::{Module, Call, Storage},
		Timestamp: pallet_timestamp::{Module, Call, Storage, Inherent},
		Aura: pallet_aura::{Module, Config<T>, Inherent},
		Grandpa: pallet_grandpa::{Module, Call, Storage, Config, Event},
		Balances: pallet_balances::{Module, Call, Storage, Config<T>, Event<T>},
		TransactionPayment: pallet_transaction_payment::{Module, Storage},
		Sudo: pallet_sudo::{Module, Call, Config<T>, Storage, Event<T>},
		Session: pallet_session::{Module, Call, Storage, Event, Config<T>},
		ShiftSessionManager: pallet_shift_session_manager::{Module},
	}
);

/// The address format for describing accounts.
pub type Address = AccountId;
/// Block header type as expected by this runtime.
pub type Header = generic::Header<BlockNumber, Hashing>;
/// Block type as expected by this runtime.
pub type Block = generic::Block<Header, UncheckedExtrinsic>;
/// A Block signed with a Justification
pub type SignedBlock = generic::SignedBlock<Block>;
/// BlockId type as expected by this runtime.
pub type BlockId = generic::BlockId<Block>;
/// The SignedExtension to the basic transaction logic.
pub type SignedExtra = (
	frame_system::CheckSpecVersion<Runtime>,
	frame_system::CheckTxVersion<Runtime>,
	frame_system::CheckGenesis<Runtime>,
	frame_system::CheckEra<Runtime>,
	frame_system::CheckNonce<Runtime>,
	frame_system::CheckWeight<Runtime>,
	pallet_transaction_payment::ChargeTransactionPayment<Runtime>,
);
/// The payload being signed in transactions.
pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;
/// Unchecked extrinsic type as expected by this runtime.
pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, Call, Signature, SignedExtra>;
/// Extrinsic type that has already been checked.
pub type CheckedExtrinsic = generic::CheckedExtrinsic<AccountId, Call, SignedExtra>;
/// Executive: handles dispatch to the various modules.
pub type Executive =
	frame_executive::Executive<Runtime, Block, frame_system::ChainContext<Runtime>, Runtime, AllModules>;

impl_runtime_apis! {
	impl sp_api::Core<Block> for Runtime {
		fn version() -> RuntimeVersion {
			VERSION
		}

		fn execute_block(block: Block) {
			Executive::execute_block(block)
		}

		fn initialize_block(header: &<Block as BlockT>::Header) {
			Executive::initialize_block(header)
		}
	}

	impl sp_api::Metadata<Block> for Runtime {
		fn metadata() -> OpaqueMetadata {
			Runtime::metadata().into()
		}
	}

	impl sp_block_builder::BlockBuilder<Block> for Runtime {
		fn apply_extrinsic(extrinsic: <Block as BlockT>::Extrinsic) -> ApplyExtrinsicResult {
			Executive::apply_extrinsic(extrinsic)
		}

		fn finalize_block() -> <Block as BlockT>::Header {
			Executive::finalize_block()
		}

		fn inherent_extrinsics(data: sp_inherents::InherentData) -> Vec<<Block as BlockT>::Extrinsic> {
			data.create_extrinsics()
		}

		fn check_inherents(
			block: Block,
			data: sp_inherents::InherentData,
		) -> sp_inherents::CheckInherentsResult {
			data.check_extrinsics(&block)
		}

		fn random_seed() -> <Block as BlockT>::Hash {
			RandomnessCollectiveFlip::random_seed()
		}
	}

	impl frame_system_rpc_runtime_api::AccountNonceApi<Block, AccountId, Index> for Runtime {
		fn account_nonce(account: AccountId) -> Index {
			System::account_nonce(account)
		}
	}

	impl sp_transaction_pool::runtime_api::TaggedTransactionQueue<Block> for Runtime {
		fn validate_transaction(
			source: TransactionSource,
			tx: <Block as BlockT>::Extrinsic,
		) -> TransactionValidity {
			Executive::validate_transaction(source, tx)
		}
	}

	impl sp_offchain::OffchainWorkerApi<Block> for Runtime {
		fn offchain_worker(header: &<Block as BlockT>::Header) {
			Executive::offchain_worker(header)
		}
	}

	impl sp_consensus_aura::AuraApi<Block, AuraId> for Runtime {
		fn slot_duration() -> u64 {
			Aura::slot_duration()
		}

		fn authorities() -> Vec<AuraId> {
			Aura::authorities()
		}
	}

	impl sp_session::SessionKeys<Block> for Runtime {
		fn generate_session_keys(seed: Option<Vec<u8>>) -> Vec<u8> {
			SessionKeys::generate(seed)
		}

		fn decode_session_keys(
			encoded: Vec<u8>,
		) -> Option<Vec<(Vec<u8>, sp_core::crypto::KeyTypeId)>> {
			SessionKeys::decode_into_raw_public_keys(&encoded)
		}
	}

	impl fg_primitives::GrandpaApi<Block> for Runtime {
		fn grandpa_authorities() -> GrandpaAuthorityList {
			Grandpa::grandpa_authorities()
		}

		fn submit_report_equivocation_unsigned_extrinsic(
			equivocation_proof: fg_primitives::EquivocationProof<
				<Block as BlockT>::Hash,
				NumberFor<Block>,
			>,
			key_owner_proof: fg_primitives::OpaqueKeyOwnershipProof,
		) -> Option<()> {
			let key_owner_proof = key_owner_proof.decode()?;

			Grandpa::submit_unsigned_equivocation_report(
				equivocation_proof,
				key_owner_proof,
			)
		}

		fn generate_key_ownership_proof(
			_set_id: fg_primitives::SetId,
			_authority_id: GrandpaId,
		) -> Option<fg_primitives::OpaqueKeyOwnershipProof> {
			// NOTE: this is the only implementation possible since we've
			// defined our key owner proof type as a bottom type (i.e. a type
			// with no values).
			None
		}
	}

	impl bp_rialto::RialtoHeaderApi<Block> for Runtime {
		fn best_blocks() -> Vec<(bp_rialto::BlockNumber, bp_rialto::Hash)> {
			BridgeRialto::best_headers()
		}

		fn finalized_block() -> (bp_rialto::BlockNumber, bp_rialto::Hash) {
			let header = BridgeRialto::best_finalized();
			(header.number, header.hash())
		}

		fn incomplete_headers() -> Vec<(bp_rialto::BlockNumber, bp_rialto::Hash)> {
			BridgeRialto::require_justifications()
		}

		fn is_known_block(hash: bp_rialto::Hash) -> bool {
			BridgeRialto::is_known_header(hash)
		}

		fn is_finalized_block(hash: bp_rialto::Hash) -> bool {
			BridgeRialto::is_finalized_header(hash)
		}
	}
}