mock.rs

// SPDX-License-Identifier: Apache-2.0
// This file is part of Frontier.
//
// Copyright (c) 2020-2022 Parity Technologies (UK) Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// 	http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! Test mock for unit tests and benchmarking

use frame_support::{
	parameter_types,
	traits::{ConstU32, FindAuthor},
	weights::Weight,
	ConsensusEngineId,
};
use sp_core::{H160, H256, U256};
use sp_runtime::{
	generic,
	traits::{BlakeTwo256, IdentityLookup},
};
use sp_std::{boxed::Box, prelude::*, str::FromStr};

use fp_evm::{ExitError, ExitReason, Transfer};
use pallet_evm::{
	Context, EnsureAddressNever, EnsureAddressRoot, FeeCalculator, IdentityAddressMapping,
	PrecompileHandle,
};

type UncheckedExtrinsic = frame_system::mocking::MockUncheckedExtrinsic<Test>;
type Block = frame_system::mocking::MockBlock<Test>;

frame_support::construct_runtime! {
	pub enum Test where
		Block = Block,
		NodeBlock = Block,
		UncheckedExtrinsic = UncheckedExtrinsic,
	{
		System: frame_system::{Pallet, Call, Config, Storage, Event<T>},
		Balances: pallet_balances::{Pallet, Call, Storage, Config<T>, Event<T>},
		Timestamp: pallet_timestamp::{Pallet, Call, Storage},
		EVM: pallet_evm::{Pallet, Call, Storage, Config, Event<T>},
		Utility: pallet_utility::{Pallet, Call, Event},
	}
}

parameter_types! {
	pub const BlockHashCount: u64 = 250;
	pub BlockWeights: frame_system::limits::BlockWeights =
		frame_system::limits::BlockWeights::simple_max(Weight::from_ref_time(1024));
}
impl frame_system::Config for Test {
	type BaseCallFilter = frame_support::traits::Everything;
	type BlockWeights = ();
	type BlockLength = ();
	type RuntimeOrigin = RuntimeOrigin;
	type RuntimeCall = RuntimeCall;
	type Index = u64;
	type BlockNumber = u64;
	type Hash = H256;
	type Hashing = BlakeTwo256;
	type AccountId = H160;
	type Lookup = IdentityLookup<Self::AccountId>;
	type Header = generic::Header<u64, BlakeTwo256>;
	type RuntimeEvent = RuntimeEvent;
	type BlockHashCount = BlockHashCount;
	type DbWeight = ();
	type Version = ();
	type PalletInfo = PalletInfo;
	type AccountData = pallet_balances::AccountData<u64>;
	type OnNewAccount = ();
	type OnKilledAccount = ();
	type SystemWeightInfo = ();
	type SS58Prefix = ();
	type OnSetCode = ();
	type MaxConsumers = ConstU32<16>;
}

impl pallet_utility::Config for Test {
	type RuntimeEvent = RuntimeEvent;
	type RuntimeCall = RuntimeCall;
	type PalletsOrigin = OriginCaller;
	type WeightInfo = pallet_utility::weights::SubstrateWeight<Test>;
}

parameter_types! {
	pub const ExistentialDeposit: u64 = 0;
}
impl pallet_balances::Config for Test {
	type Balance = u64;
	type DustRemoval = ();
	type RuntimeEvent = RuntimeEvent;
	type ExistentialDeposit = ExistentialDeposit;
	type AccountStore = System;
	type WeightInfo = ();
	type MaxLocks = ();
	type MaxReserves = ();
	type ReserveIdentifier = ();
}

parameter_types! {
	pub const MinimumPeriod: u64 = 1000;
}
impl pallet_timestamp::Config for Test {
	type Moment = u64;
	type OnTimestampSet = ();
	type MinimumPeriod = MinimumPeriod;
	type WeightInfo = ();
}

pub struct FixedGasPrice;
impl FeeCalculator for FixedGasPrice {
	fn min_gas_price() -> (U256, Weight) {
		// Return some meaningful gas price and weight
		(1_000_000_000u128.into(), Weight::from_ref_time(7u64))
	}
}

pub struct FindAuthorTruncated;
impl FindAuthor<H160> for FindAuthorTruncated {
	fn find_author<'a, I>(_digests: I) -> Option<H160>
	where
		I: 'a + IntoIterator<Item = (ConsensusEngineId, &'a [u8])>,
	{
		Some(H160::from_str("1234500000000000000000000000000000000000").unwrap())
	}
}
parameter_types! {
	pub BlockGasLimit: U256 = U256::max_value();
	pub WeightPerGas: Weight = Weight::from_ref_time(20_000);
}
impl pallet_evm::Config for Test {
	type FeeCalculator = FixedGasPrice;
	type GasWeightMapping = pallet_evm::FixedGasWeightMapping<Self>;
	type WeightPerGas = WeightPerGas;

	type BlockHashMapping = pallet_evm::SubstrateBlockHashMapping<Self>;
	type CallOrigin = EnsureAddressRoot<Self::AccountId>;

	type WithdrawOrigin = EnsureAddressNever<Self::AccountId>;
	type AddressMapping = IdentityAddressMapping;
	type Currency = Balances;

	type RuntimeEvent = RuntimeEvent;
	type PrecompilesType = ();
	type PrecompilesValue = ();
	type ChainId = ();
	type BlockGasLimit = BlockGasLimit;
	type Runner = pallet_evm::runner::stack::Runner<Self>;
	type OnChargeTransaction = ();
	type OnCreate = ();
	type FindAuthor = FindAuthorTruncated;
	type Timestamp = Timestamp;
	type WeightInfo = ();
}

pub(crate) struct MockHandle {
	pub input: Vec<u8>,
	pub context: Context,
}

impl PrecompileHandle for MockHandle {
	fn call(
		&mut self,
		_: H160,
		_: Option<Transfer>,
		_: Vec<u8>,
		_: Option<u64>,
		_: bool,
		_: &Context,
	) -> (ExitReason, Vec<u8>) {
		unimplemented!()
	}

	fn record_cost(&mut self, _: u64) -> Result<(), ExitError> {
		Ok(())
	}

	fn remaining_gas(&self) -> u64 {
		unimplemented!()
	}

	fn log(&mut self, _: H160, _: Vec<H256>, _: Vec<u8>) -> Result<(), ExitError> {
		unimplemented!()
	}

	fn code_address(&self) -> H160 {
		unimplemented!()
	}

	fn input(&self) -> &[u8] {
		&self.input
	}

	fn context(&self) -> &Context {
		&self.context
	}

	fn is_static(&self) -> bool {
		unimplemented!()
	}

	fn gas_limit(&self) -> Option<u64> {
		None
	}
}