lib.rs

//! The Substrate Node Template 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"]

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

use codec::{Decode, Encode};
use pallet_evm::FeeCalculator;
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, Public},
	OpaqueMetadata, H160, H256, U256,
};
use sp_runtime::{
	create_runtime_str, generic, impl_opaque_keys,
	traits::{
		AccountIdLookup, BlakeTwo256, Block as BlockT, Dispatchable, IdentifyAccount, NumberFor,
		PostDispatchInfoOf, Verify,
	},
	transaction_validity::{TransactionSource, TransactionValidity, TransactionValidityError},
	ApplyExtrinsicResult, MultiSignature,
};
use sp_std::{marker::PhantomData, prelude::*};
#[cfg(feature = "std")]
use sp_version::NativeVersion;
use sp_version::RuntimeVersion;

// A few exports that help ease life for downstream crates.
use fp_rpc::TransactionStatus;
pub use frame_support::{
	construct_runtime, parameter_types,
	traits::{FindAuthor, KeyOwnerProofSystem, Randomness},
	weights::{
		constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},
		IdentityFee, Weight,
	},
	ConsensusEngineId, StorageValue,
};
pub use pallet_balances::Call as BalancesCall;
use pallet_ethereum::{Call::transact, Transaction as EthereumTransaction};
use pallet_evm::{Account as EVMAccount, EnsureAddressTruncated, HashedAddressMapping, Runner};
pub use pallet_timestamp::Call as TimestampCall;
use pallet_transaction_payment::CurrencyAdapter;
#[cfg(any(feature = "std", test))]
pub use sp_runtime::BuildStorage;
pub use sp_runtime::{Perbill, Permill};

mod precompiles;
use precompiles::FrontierPrecompiles;

/// Type of block number.
pub type BlockNumber = u32;

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

/// 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 = <<Signature as Verify>::Signer as IdentifyAccount>::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 = u128;

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

/// A hash of some data used by the chain.
pub type Hash = sp_core::H256;

/// 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, BlakeTwo256>;
	/// 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,
		}
	}
}

pub const VERSION: RuntimeVersion = RuntimeVersion {
	spec_name: create_runtime_str!("node-frontier-template"),
	impl_name: create_runtime_str!("node-frontier-template"),
	authoring_version: 1,
	spec_version: 1,
	impl_version: 1,
	apis: RUNTIME_API_VERSIONS,
	transaction_version: 1,
};

pub const MILLISECS_PER_BLOCK: u64 = 1000;

pub const SLOT_DURATION: u64 = MILLISECS_PER_BLOCK;

// Time is measured by 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(),
	}
}

const NORMAL_DISPATCH_RATIO: Perbill = Perbill::from_percent(75);

parameter_types! {
	pub const Version: RuntimeVersion = VERSION;
	pub const BlockHashCount: BlockNumber = 256;
	/// We allow for 2 seconds of compute with a 6 second average block time.
	pub BlockWeights: frame_system::limits::BlockWeights = frame_system::limits::BlockWeights
		::with_sensible_defaults(2 * WEIGHT_PER_SECOND, NORMAL_DISPATCH_RATIO);
	pub BlockLength: frame_system::limits::BlockLength = frame_system::limits::BlockLength
		::max_with_normal_ratio(5 * 1024 * 1024, NORMAL_DISPATCH_RATIO);
	pub const SS58Prefix: u8 = 42;
}

// Configure FRAME pallets to include in runtime.

impl frame_system::Config for Runtime {
	/// The basic call filter to use in dispatchable.
	type BaseCallFilter = frame_support::traits::Everything;
	/// Block & extrinsics weights: base values and limits.
	type BlockWeights = BlockWeights;
	/// The maximum length of a block (in bytes).
	type BlockLength = BlockLength;
	/// 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 = AccountIdLookup<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 = BlakeTwo256;
	/// The header type.
	type Header = generic::Header<BlockNumber, BlakeTwo256>;
	/// 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;
	/// The weight of database operations that the runtime can invoke.
	type DbWeight = RocksDbWeight;
	/// Version of the runtime.
	type Version = Version;
	/// Converts a module to the index of the module in `construct_runtime!`.
	///
	/// This type is being generated by `construct_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>;
	/// Weight information for the extrinsics of this pallet.
	type SystemWeightInfo = ();
	/// This is used as an identifier of the chain. 42 is the generic substrate prefix.
	type SS58Prefix = SS58Prefix;
	/// The set code logic, just the default since we're not a parachain.
	type OnSetCode = ();
}

parameter_types! {
	pub const MaxAuthorities: u32 = 100;
}

impl pallet_aura::Config for Runtime {
	type AuthorityId = AuraId;
	type DisabledValidators = ();
	type MaxAuthorities = MaxAuthorities;
}

impl pallet_grandpa::Config 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 = ();

	type WeightInfo = ();
}

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

impl pallet_timestamp::Config for Runtime {
	/// A timestamp: milliseconds since the unix epoch.
	type Moment = u64;
	type MinimumPeriod = MinimumPeriod;
	type WeightInfo = ();
	#[cfg(feature = "aura")]
	type OnTimestampSet = Aura;
	#[cfg(feature = "manual-seal")]
	type OnTimestampSet = ();
}

parameter_types! {
	pub const ExistentialDeposit: u128 = 0;
	// 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::Config for Runtime {
	type MaxLocks = MaxLocks;
	type MaxReserves = ();
	type ReserveIdentifier = [u8; 8];
	/// 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;
	type WeightInfo = ();
}

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

impl pallet_transaction_payment::Config for Runtime {
	type OnChargeTransaction = CurrencyAdapter<Balances, ()>;
	type TransactionByteFee = TransactionByteFee;
	type WeightToFee = IdentityFee<Balance>;
	type FeeMultiplierUpdate = ();
}

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

pub struct FindAuthorTruncated<F>(PhantomData<F>);
impl<F: FindAuthor<u32>> FindAuthor<H160> for FindAuthorTruncated<F> {
	fn find_author<'a, I>(digests: I) -> Option<H160>
	where
		I: 'a + IntoIterator<Item = (ConsensusEngineId, &'a [u8])>,
	{
		if let Some(author_index) = F::find_author(digests) {
			let authority_id = Aura::authorities()[author_index as usize].clone();
			return Some(H160::from_slice(&authority_id.to_raw_vec()[4..24]));
		}
		None
	}
}

parameter_types! {
	pub const ChainId: u64 = 42;
	pub BlockGasLimit: U256 = U256::from(u32::max_value());
	pub PrecompilesValue: FrontierPrecompiles<Runtime> = FrontierPrecompiles::<_>::new();
}

impl pallet_evm::Config for Runtime {
	type FeeCalculator = BaseFee;
	type GasWeightMapping = ();
	type BlockHashMapping = pallet_ethereum::EthereumBlockHashMapping<Self>;
	type CallOrigin = EnsureAddressTruncated;
	type WithdrawOrigin = EnsureAddressTruncated;
	type AddressMapping = HashedAddressMapping<BlakeTwo256>;
	type Currency = Balances;
	type Event = Event;
	type Runner = pallet_evm::runner::stack::Runner<Self>;
	type PrecompilesType = FrontierPrecompiles<Self>;
	type PrecompilesValue = PrecompilesValue;
	type ChainId = ChainId;
	type BlockGasLimit = BlockGasLimit;
	type OnChargeTransaction = ();
	type FindAuthor = FindAuthorTruncated<Aura>;
}

impl pallet_ethereum::Config for Runtime {
	type Event = Event;
	type StateRoot = pallet_ethereum::IntermediateStateRoot;
}

frame_support::parameter_types! {
	pub BoundDivision: U256 = U256::from(1024);
}

impl pallet_dynamic_fee::Config for Runtime {
	type MinGasPriceBoundDivisor = BoundDivision;
}

frame_support::parameter_types! {
	pub IsActive: bool = true;
	pub DefaultBaseFeePerGas: U256 = U256::from(1_000_000_000);
}

pub struct BaseFeeThreshold;
impl pallet_base_fee::BaseFeeThreshold for BaseFeeThreshold {
	fn lower() -> Permill {
		Permill::zero()
	}
	fn ideal() -> Permill {
		Permill::from_parts(500_000)
	}
	fn upper() -> Permill {
		Permill::from_parts(1_000_000)
	}
}

impl pallet_base_fee::Config for Runtime {
	type Event = Event;
	type Threshold = BaseFeeThreshold;
	type IsActive = IsActive;
	type DefaultBaseFeePerGas = DefaultBaseFeePerGas;
}

impl pallet_randomness_collective_flip::Config for Runtime {}

// Create the runtime by composing the FRAME pallets that were previously configured.
construct_runtime!(
	pub enum Runtime where
		Block = Block,
		NodeBlock = opaque::Block,
		UncheckedExtrinsic = UncheckedExtrinsic
	{
		System: frame_system::{Pallet, Call, Config, Storage, Event<T>},
		RandomnessCollectiveFlip: pallet_randomness_collective_flip::{Pallet, Storage},
		Timestamp: pallet_timestamp::{Pallet, Call, Storage, Inherent},
		Aura: pallet_aura::{Pallet, Config<T>},
		Grandpa: pallet_grandpa::{Pallet, Call, Storage, Config, Event},
		Balances: pallet_balances::{Pallet, Call, Storage, Config<T>, Event<T>},
		TransactionPayment: pallet_transaction_payment::{Pallet, Storage},
		Sudo: pallet_sudo::{Pallet, Call, Config<T>, Storage, Event<T>},
		Ethereum: pallet_ethereum::{Pallet, Call, Storage, Event, Config, Origin},
		EVM: pallet_evm::{Pallet, Config, Call, Storage, Event<T>},
		DynamicFee: pallet_dynamic_fee::{Pallet, Call, Storage, Config, Inherent},
		BaseFee: pallet_base_fee::{Pallet, Call, Storage, Config<T>, Event},
	}
);

pub struct TransactionConverter;

impl fp_rpc::ConvertTransaction<UncheckedExtrinsic> for TransactionConverter {
	fn convert_transaction(&self, transaction: pallet_ethereum::Transaction) -> UncheckedExtrinsic {
		UncheckedExtrinsic::new_unsigned(
			pallet_ethereum::Call::<Runtime>::transact { transaction }.into(),
		)
	}
}

impl fp_rpc::ConvertTransaction<opaque::UncheckedExtrinsic> for TransactionConverter {
	fn convert_transaction(
		&self,
		transaction: pallet_ethereum::Transaction,
	) -> opaque::UncheckedExtrinsic {
		let extrinsic = UncheckedExtrinsic::new_unsigned(
			pallet_ethereum::Call::<Runtime>::transact { transaction }.into(),
		);
		let encoded = extrinsic.encode();
		opaque::UncheckedExtrinsic::decode(&mut &encoded[..])
			.expect("Encoded extrinsic is always valid")
	}
}

/// The address format for describing accounts.
pub type Address = sp_runtime::MultiAddress<AccountId, ()>;
/// Block header type as expected by this runtime.
pub type Header = generic::Header<BlockNumber, BlakeTwo256>;
/// 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>,
);
/// Unchecked extrinsic type as expected by this runtime.
pub type UncheckedExtrinsic =
	fp_self_contained::UncheckedExtrinsic<Address, Call, Signature, SignedExtra>;
/// Extrinsic type that has already been checked.
pub type CheckedExtrinsic = fp_self_contained::CheckedExtrinsic<AccountId, Call, SignedExtra, H160>;
/// Executive: handles dispatch to the various modules.
pub type Executive = frame_executive::Executive<
	Runtime,
	Block,
	frame_system::ChainContext<Runtime>,
	Runtime,
	AllPallets,
>;

impl fp_self_contained::SelfContainedCall for Call {
	type SignedInfo = H160;

	fn is_self_contained(&self) -> bool {
		match self {
			Call::Ethereum(call) => call.is_self_contained(),
			_ => false,
		}
	}

	fn check_self_contained(&self) -> Option<Result<Self::SignedInfo, TransactionValidityError>> {
		match self {
			Call::Ethereum(call) => call.check_self_contained(),
			_ => None,
		}
	}

	fn validate_self_contained(&self, info: &Self::SignedInfo) -> Option<TransactionValidity> {
		match self {
			Call::Ethereum(call) => call.validate_self_contained(info),
			_ => None,
		}
	}

	fn pre_dispatch_self_contained(
		&self,
		info: &Self::SignedInfo,
	) -> Option<Result<(), TransactionValidityError>> {
		match self {
			Call::Ethereum(call) => call.pre_dispatch_self_contained(info),
			_ => None,
		}
	}

	fn apply_self_contained(
		self,
		info: Self::SignedInfo,
	) -> Option<sp_runtime::DispatchResultWithInfo<PostDispatchInfoOf<Self>>> {
		match self {
			call @ Call::Ethereum(pallet_ethereum::Call::transact { .. }) => Some(call.dispatch(
				Origin::from(pallet_ethereum::RawOrigin::EthereumTransaction(info)),
			)),
			_ => None,
		}
	}
}

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 {
			OpaqueMetadata::new(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)
		}
	}

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

	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() -> sp_consensus_aura::SlotDuration {
			sp_consensus_aura::SlotDuration::from_millis(Aura::slot_duration())
		}

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

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

	impl fp_rpc::EthereumRuntimeRPCApi<Block> for Runtime {
		fn chain_id() -> u64 {
			<Runtime as pallet_evm::Config>::ChainId::get()
		}

		fn account_basic(address: H160) -> EVMAccount {
			EVM::account_basic(&address)
		}

		fn gas_price() -> U256 {
			<Runtime as pallet_evm::Config>::FeeCalculator::min_gas_price()
		}

		fn account_code_at(address: H160) -> Vec<u8> {
			EVM::account_codes(address)
		}

		fn author() -> H160 {
			<pallet_evm::Pallet<Runtime>>::find_author()
		}

		fn storage_at(address: H160, index: U256) -> H256 {
			let mut tmp = [0u8; 32];
			index.to_big_endian(&mut tmp);
			EVM::account_storages(address, H256::from_slice(&tmp[..]))
		}

		fn call(
			from: H160,
			to: H160,
			data: Vec<u8>,
			value: U256,
			gas_limit: U256,
			max_fee_per_gas: Option<U256>,
			max_priority_fee_per_gas: Option<U256>,
			nonce: Option<U256>,
			estimate: bool,
			access_list: Option<Vec<(H160, Vec<H256>)>>,
		) -> Result<pallet_evm::CallInfo, sp_runtime::DispatchError> {
			let config = if estimate {
				let mut config = <Runtime as pallet_evm::Config>::config().clone();
				config.estimate = true;
				Some(config)
			} else {
				None
			};

			<Runtime as pallet_evm::Config>::Runner::call(
				from,
				to,
				data,
				value,
				gas_limit.low_u64(),
				max_fee_per_gas,
				max_priority_fee_per_gas,
				nonce,
				access_list.unwrap_or_default(),
				config.as_ref().unwrap_or(<Runtime as pallet_evm::Config>::config()),
			).map_err(|err| err.into())
		}

		fn create(
			from: H160,
			data: Vec<u8>,
			value: U256,
			gas_limit: U256,
			max_fee_per_gas: Option<U256>,
			max_priority_fee_per_gas: Option<U256>,
			nonce: Option<U256>,
			estimate: bool,
			access_list: Option<Vec<(H160, Vec<H256>)>>,
		) -> Result<pallet_evm::CreateInfo, sp_runtime::DispatchError> {
			let config = if estimate {
				let mut config = <Runtime as pallet_evm::Config>::config().clone();
				config.estimate = true;
				Some(config)
			} else {
				None
			};

			<Runtime as pallet_evm::Config>::Runner::create(
				from,
				data,
				value,
				gas_limit.low_u64(),
				max_fee_per_gas,
				max_priority_fee_per_gas,
				nonce,
				access_list.unwrap_or_default(),
				config.as_ref().unwrap_or(<Runtime as pallet_evm::Config>::config()),
			).map_err(|err| err.into())
		}

		fn current_transaction_statuses() -> Option<Vec<TransactionStatus>> {
			Ethereum::current_transaction_statuses()
		}

		fn current_block() -> Option<pallet_ethereum::Block> {
			Ethereum::current_block()
		}

		fn current_receipts() -> Option<Vec<pallet_ethereum::Receipt>> {
			Ethereum::current_receipts()
		}

		fn current_all() -> (
			Option<pallet_ethereum::Block>,
			Option<Vec<pallet_ethereum::Receipt>>,
			Option<Vec<TransactionStatus>>
		) {
			(
				Ethereum::current_block(),
				Ethereum::current_receipts(),
				Ethereum::current_transaction_statuses()
			)
		}

		fn extrinsic_filter(
			xts: Vec<<Block as BlockT>::Extrinsic>,
		) -> Vec<EthereumTransaction> {
			xts.into_iter().filter_map(|xt| match xt.0.function {
				Call::Ethereum(transact { transaction }) => Some(transaction),
				_ => None
			}).collect::<Vec<EthereumTransaction>>()
		}

		fn elasticity() -> Option<Permill> {
			Some(BaseFee::elasticity())
		}
	}

	impl fp_rpc::ConvertTransactionRuntimeApi<Block> for Runtime {
		fn convert_transaction(transaction: EthereumTransaction) -> <Block as BlockT>::Extrinsic {
			UncheckedExtrinsic::new_unsigned(
				pallet_ethereum::Call::<Runtime>::transact { transaction }.into(),
			)
		}
	}

	impl pallet_transaction_payment_rpc_runtime_api::TransactionPaymentApi<
		Block,
		Balance,
	> for Runtime {
		fn query_info(
			uxt: <Block as BlockT>::Extrinsic,
			len: u32
		) -> pallet_transaction_payment_rpc_runtime_api::RuntimeDispatchInfo<Balance> {
			TransactionPayment::query_info(uxt, len)
		}

		fn query_fee_details(
			uxt: <Block as BlockT>::Extrinsic,
			len: u32,
		) -> pallet_transaction_payment::FeeDetails<Balance> {
			TransactionPayment::query_fee_details(uxt, len)
		}
	}

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

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

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

		fn current_set_id() -> fg_primitives::SetId {
			Grandpa::current_set_id()
		}

		fn submit_report_equivocation_unsigned_extrinsic(
			_equivocation_proof: fg_primitives::EquivocationProof<
				<Block as BlockT>::Hash,
				NumberFor<Block>,
			>,
			_key_owner_proof: fg_primitives::OpaqueKeyOwnershipProof,
		) -> Option<()> {
			None
		}

		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
		}
	}

	#[cfg(feature = "runtime-benchmarks")]
	impl frame_benchmarking::Benchmark<Block> for Runtime {
		fn dispatch_benchmark(
			config: frame_benchmarking::BenchmarkConfig
		) -> Result<Vec<frame_benchmarking::BenchmarkBatch>, sp_runtime::RuntimeString> {
			use frame_benchmarking::{Benchmarking, BenchmarkBatch, add_benchmark, TrackedStorageKey};
			use pallet_evm::Module as PalletEvmBench;
			impl frame_system_benchmarking::Config for Runtime {}

			let whitelist: Vec<TrackedStorageKey> = vec![];

			let mut batches = Vec::<BenchmarkBatch>::new();
			let params = (&config, &whitelist);

			add_benchmark!(params, batches, pallet_evm, PalletEvmBench::<Runtime>);

			if batches.is_empty() { return Err("Benchmark not found for this pallet.".into()) }
			Ok(batches)
		}
	}
}