git.delta.rocks / unique-network / refs/commits / b81a4dfe8aee

1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// This file is part of Unique Network.34// Unique Network is free software: you can redistribute it and/or modify5// it under the terms of the GNU General Public License as published by6// the Free Software Foundation, either version 3 of the License, or7// (at your option) any later version.89// Unique Network is distributed in the hope that it will be useful,10// but WITHOUT ANY WARRANTY; without even the implied warranty of11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the12// GNU General Public License for more details.1314// You should have received a copy of the GNU General Public License15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.1617#![doc = include_str!("../README.md")]18#![cfg_attr(not(feature = "std"), no_std)]19#![deny(missing_docs)]2021pub use pallet::*;22#[cfg(feature = "runtime-benchmarks")]23pub mod benchmarking;24pub mod weights;2526#[frame_support::pallet]27pub mod pallet {28	use frame_support::{29		pallet_prelude::{*, DispatchResult},30		traits::IsType,31	};32	use frame_system::pallet_prelude::{*, OriginFor};33	use sp_core::{H160, H256};34	use sp_std::vec::Vec;35	use super::weights::WeightInfo;36	use pallet_evm::{PrecompileHandle, Pallet as PalletEvm};3738	#[pallet::config]39	pub trait Config: frame_system::Config + pallet_evm::Config {40		/// Weights41		type WeightInfo: WeightInfo;42		/// The overarching event type.43		type RuntimeEvent: From<Event<Self>> + IsType<<Self as frame_system::Config>::RuntimeEvent>;44	}4546	type SelfWeightOf<T> = <T as Config>::WeightInfo;4748	#[pallet::pallet]49	#[pallet::generate_store(pub(super) trait Store)]50	pub struct Pallet<T>(_);5152	#[pallet::event]53	pub enum Event<T: Config> {54		/// This event is used in benchmarking and can be used for tests55		TestEvent,56	}5758	#[pallet::error]59	pub enum Error<T> {60		/// Can only migrate to empty address.61		AccountNotEmpty,62		/// Migration of this account is not yet started, or already finished.63		AccountIsNotMigrating,64		/// Failed to decode event bytes65		BadEvent,66	}6768	#[pallet::storage]69	pub(super) type MigrationPending<T: Config> =70		StorageMap<Hasher = Twox64Concat, Key = H160, Value = bool, QueryKind = ValueQuery>;7172	#[pallet::call]73	impl<T: Config> Pallet<T> {74		/// Start contract migration, inserts contract stub at target address,75		/// and marks account as pending, allowing to insert storage76		#[pallet::weight(<SelfWeightOf<T>>::begin())]77		pub fn begin(origin: OriginFor<T>, address: H160) -> DispatchResult {78			ensure_root(origin)?;79			ensure!(80				<PalletEvm<T>>::is_account_empty(&address) && !<MigrationPending<T>>::get(&address),81				<Error<T>>::AccountNotEmpty,82			);8384			<MigrationPending<T>>::insert(address, true);85			Ok(())86		}8788		/// Insert items into contract storage, this method can be called89		/// multiple times90		#[pallet::weight(<SelfWeightOf<T>>::set_data(data.len() as u32))]91		pub fn set_data(92			origin: OriginFor<T>,93			address: H160,94			data: Vec<(H256, H256)>,95		) -> DispatchResult {96			ensure_root(origin)?;97			ensure!(98				<MigrationPending<T>>::get(&address),99				<Error<T>>::AccountIsNotMigrating,100			);101102			for (k, v) in data {103				<pallet_evm::AccountStorages<T>>::insert(&address, k, v);104			}105			Ok(())106		}107108		/// Finish contract migration, allows it to be called.109		/// It is not possible to alter contract storage via [`Self::set_data`]110		/// after this call.111		#[pallet::weight(<SelfWeightOf<T>>::finish(code.len() as u32))]112		pub fn finish(origin: OriginFor<T>, address: H160, code: Vec<u8>) -> DispatchResult {113			ensure_root(origin)?;114			ensure!(115				<MigrationPending<T>>::get(&address),116				<Error<T>>::AccountIsNotMigrating,117			);118119			<pallet_evm::AccountCodes<T>>::insert(&address, code);120			<MigrationPending<T>>::remove(address);121			Ok(())122		}123124		/// Create ethereum events attached to the fake transaction125		#[pallet::weight(<SelfWeightOf<T>>::insert_eth_logs(logs.len() as u32))]126		pub fn insert_eth_logs(origin: OriginFor<T>, logs: Vec<ethereum::Log>) -> DispatchResult {127			ensure_root(origin)?;128			for log in logs {129				<pallet_evm::Pallet<T>>::deposit_log(log);130			}131			// Transactions is created by FakeTransactionFinalizer132			Ok(())133		}134135		/// Create substrate events136		#[pallet::weight(<SelfWeightOf<T>>::insert_events(events.len() as u32))]137		pub fn insert_events(origin: OriginFor<T>, events: Vec<Vec<u8>>) -> DispatchResult {138			ensure_root(origin)?;139			for event in events {140				<frame_system::Pallet<T>>::deposit_event(141					<T as frame_system::Config>::RuntimeEvent::decode(&mut event.as_slice())142						.map_err(|_| <Error<T>>::BadEvent)?,143				);144			}145			Ok(())146		}147	}148149	/// Implements [`pallet_evm::OnMethodCall`], which reserves accounts with pending migration150	pub struct OnMethodCall<T>(PhantomData<T>);151	impl<T: Config> pallet_evm::OnMethodCall<T> for OnMethodCall<T> {152		fn is_reserved(contract: &H160) -> bool {153			<MigrationPending<T>>::get(&contract)154		}155156		fn is_used(_contract: &H160) -> bool {157			false158		}159160		fn call(_handle: &mut impl PrecompileHandle) -> Option<pallet_evm::PrecompileResult> {161			None162		}163164		fn get_code(_contract: &H160) -> Option<Vec<u8>> {165			None166		}167	}168}