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* Add initial impl of evm-system * Check account existence * Improve creation account logic * Add new line * Add default implementations * Add mock * Use DispatchResult instead of custom enums * Basic create account tests * Add simple tests with remove account and nonce update * Remove default implementations for OnNewAccount and OnKilledAccount * Add mock objects for OnNewAccount and OnKilledAccount * Use mock logic in tests * Some tests improvements * Add docs to tests * Check events in tests
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| [package] | ||
| name = "pallet-evm-system" | ||
| version = "1.0.0-dev" | ||
| license = "Apache-2.0" | ||
| description = "FRAME EVM SYSTEM pallet." | ||
| authors = { workspace = true } | ||
| edition = { workspace = true } | ||
| repository = { workspace = true } | ||
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|
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| [package.metadata.docs.rs] | ||
| targets = ["x86_64-unknown-linux-gnu"] | ||
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| [dependencies] | ||
| log = { version = "0.4.17", default-features = false } | ||
| scale-codec = { package = "parity-scale-codec", workspace = true } | ||
| scale-info = { workspace = true } | ||
| # Substrate | ||
| frame-support = { workspace = true } | ||
| frame-system = { workspace = true } | ||
| sp-runtime = { workspace = true } | ||
| sp-std = { workspace = true } | ||
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| [dev-dependencies] | ||
| mockall = "0.11" | ||
| sp-core = { workspace = true } | ||
| sp-io = { workspace = true } | ||
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| [features] | ||
| default = ["std"] | ||
| std = [ | ||
| "log/std", | ||
| "scale-codec/std", | ||
| "scale-info/std", | ||
| # Substrate | ||
| "frame-support/std", | ||
| "frame-system/std", | ||
| "sp-runtime/std", | ||
| "sp-std/std", | ||
| ] |
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| // 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. | ||
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| //! # EVM System Pallet. | ||
| // Ensure we're `no_std` when compiling for Wasm. | ||
| #![cfg_attr(not(feature = "std"), no_std)] | ||
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| use sp_runtime::{traits::One, RuntimeDebug, DispatchResult}; | ||
| use scale_codec::{Encode, Decode, MaxEncodedLen, FullCodec}; | ||
| use scale_info::TypeInfo; | ||
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| #[cfg(test)] | ||
| mod mock; | ||
| #[cfg(test)] | ||
| mod tests; | ||
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| pub use pallet::*; | ||
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| /// Account information. | ||
| #[derive(Clone, Eq, PartialEq, Default, RuntimeDebug, Encode, Decode, TypeInfo, MaxEncodedLen)] | ||
| pub struct AccountInfo<Index, AccountData> { | ||
| /// The number of transactions this account has sent. | ||
| pub nonce: Index, | ||
| /// The additional data that belongs to this account. Used to store the balance(s) in a lot of | ||
| /// chains. | ||
| pub data: AccountData, | ||
| } | ||
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| #[frame_support::pallet] | ||
| pub mod pallet { | ||
| use super::*; | ||
| use frame_support::pallet_prelude::*; | ||
| use sp_runtime::traits::{MaybeDisplay, AtLeast32Bit}; | ||
| use sp_std::fmt::Debug; | ||
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| #[pallet::pallet] | ||
| #[pallet::generate_store(pub(super) trait Store)] | ||
| #[pallet::without_storage_info] | ||
| pub struct Pallet<T>(PhantomData<T>); | ||
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| #[pallet::config] | ||
| pub trait Config: frame_system::Config { | ||
| /// The overarching event type. | ||
| type RuntimeEvent: From<Event<Self>> + IsType<<Self as frame_system::Config>::RuntimeEvent>; | ||
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| /// The user account identifier type. | ||
| type AccountId: Parameter | ||
| + Member | ||
| + MaybeSerializeDeserialize | ||
| + Debug | ||
| + MaybeDisplay | ||
| + Ord | ||
| + MaxEncodedLen; | ||
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| /// Account index (aka nonce) type. This stores the number of previous transactions | ||
| /// associated with a sender account. | ||
| type Index: Parameter | ||
| + Member | ||
| + MaybeSerializeDeserialize | ||
| + Debug | ||
| + Default | ||
| + MaybeDisplay | ||
| + AtLeast32Bit | ||
| + Copy | ||
| + MaxEncodedLen; | ||
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| /// Data to be associated with an account (other than nonce/transaction counter, which this | ||
| /// pallet does regardless). | ||
| type AccountData: Member + FullCodec + Clone + Default + TypeInfo + MaxEncodedLen; | ||
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| /// Handler for when a new account has just been created. | ||
| type OnNewAccount: OnNewAccount<<Self as Config>::AccountId>; | ||
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| /// A function that is invoked when an account has been determined to be dead. | ||
| /// | ||
| /// All resources should be cleaned up associated with the given account. | ||
| type OnKilledAccount: OnKilledAccount<<Self as Config>::AccountId>; | ||
| } | ||
|
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| /// The full account information for a particular account ID. | ||
| #[pallet::storage] | ||
| #[pallet::getter(fn full_account)] | ||
| pub type FullAccount<T: Config> = StorageMap< | ||
| _, | ||
| Blake2_128Concat, | ||
| <T as Config>::AccountId, | ||
| AccountInfo<<T as Config>::Index, <T as Config>::AccountData>, | ||
| ValueQuery, | ||
| >; | ||
|
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| #[pallet::event] | ||
| #[pallet::generate_deposit(pub(super) fn deposit_event)] | ||
| pub enum Event<T: Config> { | ||
| /// A new account was created. | ||
| NewAccount { account: <T as Config>::AccountId }, | ||
| /// An account was reaped. | ||
| KilledAccount { account: <T as Config>::AccountId }, | ||
| } | ||
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| #[pallet::error] | ||
| pub enum Error<T> { | ||
| /// The account already exists in case creating it. | ||
| AccountAlreadyExist, | ||
| /// The account doesn't exist in case removing it. | ||
| AccountNotExist, | ||
| } | ||
| } | ||
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| impl<T: Config> Pallet<T> { | ||
| /// Check the account existence. | ||
| pub fn account_exists(who: &<T as Config>::AccountId) -> bool { | ||
| FullAccount::<T>::contains_key(who) | ||
| } | ||
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| /// An account is being created. | ||
| fn on_created_account(who: <T as Config>::AccountId) { | ||
| <T as Config>::OnNewAccount::on_new_account(&who); | ||
| Self::deposit_event(Event::NewAccount { account: who }); | ||
| } | ||
|
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| /// Do anything that needs to be done after an account has been killed. | ||
| fn on_killed_account(who: <T as Config>::AccountId) { | ||
| <T as Config>::OnKilledAccount::on_killed_account(&who); | ||
| Self::deposit_event(Event::KilledAccount { account: who }); | ||
| } | ||
|
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| /// Retrieve the account transaction counter from storage. | ||
| pub fn account_nonce(who: &<T as Config>::AccountId) -> <T as Config>::Index { | ||
| FullAccount::<T>::get(who).nonce | ||
| } | ||
|
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| /// Increment a particular account's nonce by 1. | ||
| pub fn inc_account_nonce(who: &<T as Config>::AccountId) { | ||
| FullAccount::<T>::mutate(who, |a| a.nonce += <T as pallet::Config>::Index::one()); | ||
| } | ||
|
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| /// Create an account. | ||
| pub fn create_account(who: &<T as Config>::AccountId) -> DispatchResult { | ||
| if Self::account_exists(who) { | ||
| return Err(Error::<T>::AccountAlreadyExist.into()); | ||
| } | ||
|
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| FullAccount::<T>::insert(who.clone(), AccountInfo::<_, _>::default()); | ||
| Self::on_created_account(who.clone()); | ||
| Ok(()) | ||
| } | ||
|
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| /// Remove an account. | ||
| pub fn remove_account(who: &<T as Config>::AccountId) -> DispatchResult { | ||
| if !Self::account_exists(who) { | ||
| return Err(Error::<T>::AccountNotExist.into()); | ||
| } | ||
|
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| FullAccount::<T>::remove(who); | ||
| Self::on_killed_account(who.clone()); | ||
| Ok(()) | ||
| } | ||
| } | ||
|
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| /// Interface to handle account creation. | ||
| pub trait OnNewAccount<AccountId> { | ||
| /// A new account `who` has been registered. | ||
| fn on_new_account(who: &AccountId); | ||
| } | ||
|
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| /// Interface to handle account killing. | ||
| pub trait OnKilledAccount<AccountId> { | ||
| /// The account with the given id was reaped. | ||
| fn on_killed_account(who: &AccountId); | ||
| } |
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