git.delta.rocks / unique-network / refs/commits / 98c55c3ef587

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::call_index(0)]77		#[pallet::weight(<SelfWeightOf<T>>::begin())]78		pub fn begin(origin: OriginFor<T>, address: H160) -> DispatchResult {79			ensure_root(origin)?;80			ensure!(81				<PalletEvm<T>>::is_account_empty(&address) && !<MigrationPending<T>>::get(&address),82				<Error<T>>::AccountNotEmpty,83			);8485			<MigrationPending<T>>::insert(address, true);86			Ok(())87		}8889		/// Insert items into contract storage, this method can be called90		/// multiple times91		#[pallet::call_index(1)]92		#[pallet::weight(<SelfWeightOf<T>>::set_data(data.len() as u32))]93		pub fn set_data(94			origin: OriginFor<T>,95			address: H160,96			data: Vec<(H256, H256)>,97		) -> DispatchResult {98			ensure_root(origin)?;99			ensure!(100				<MigrationPending<T>>::get(&address),101				<Error<T>>::AccountIsNotMigrating,102			);103104			for (k, v) in data {105				<pallet_evm::AccountStorages<T>>::insert(&address, k, v);106			}107			Ok(())108		}109110		/// Finish contract migration, allows it to be called.111		/// It is not possible to alter contract storage via [`Self::set_data`]112		/// after this call.113		#[pallet::call_index(2)]114		#[pallet::weight(<SelfWeightOf<T>>::finish(code.len() as u32))]115		pub fn finish(origin: OriginFor<T>, address: H160, code: Vec<u8>) -> DispatchResult {116			ensure_root(origin)?;117			ensure!(118				<MigrationPending<T>>::get(&address),119				<Error<T>>::AccountIsNotMigrating,120			);121122			<pallet_evm::AccountCodes<T>>::insert(&address, code);123			<MigrationPending<T>>::remove(address);124			Ok(())125		}126127		/// Create ethereum events attached to the fake transaction128		#[pallet::call_index(3)]129		#[pallet::weight(<SelfWeightOf<T>>::insert_eth_logs(logs.len() as u32))]130		pub fn insert_eth_logs(origin: OriginFor<T>, logs: Vec<ethereum::Log>) -> DispatchResult {131			ensure_root(origin)?;132			for log in logs {133				<pallet_evm::Pallet<T>>::deposit_log(log);134			}135			// Transactions is created by FakeTransactionFinalizer136			Ok(())137		}138139		/// Create substrate events140		#[pallet::call_index(4)]141		#[pallet::weight(<SelfWeightOf<T>>::insert_events(events.len() as u32))]142		pub fn insert_events(origin: OriginFor<T>, events: Vec<Vec<u8>>) -> DispatchResult {143			ensure_root(origin)?;144			for event in events {145				<frame_system::Pallet<T>>::deposit_event(146					<T as frame_system::Config>::RuntimeEvent::decode(&mut event.as_slice())147						.map_err(|_| <Error<T>>::BadEvent)?,148				);149			}150			Ok(())151		}152	}153154	/// Implements [`pallet_evm::OnMethodCall`], which reserves accounts with pending migration155	pub struct OnMethodCall<T>(PhantomData<T>);156	impl<T: Config> pallet_evm::OnMethodCall<T> for OnMethodCall<T> {157		fn is_reserved(contract: &H160) -> bool {158			<MigrationPending<T>>::get(&contract)159		}160161		fn is_used(_contract: &H160) -> bool {162			false163		}164165		fn call(_handle: &mut impl PrecompileHandle) -> Option<pallet_evm::PrecompileResult> {166			None167		}168169		fn get_code(_contract: &H160) -> Option<Vec<u8>> {170			None171		}172	}173}