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evm-chain-id pallet (paritytech#804)
* Add evm-chain-id pallet Signed-off-by: koushiro <koushiro.cqx@gmail.com> * Add some doc Signed-off-by: koushiro <koushiro.cqx@gmail.com>
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| [package] | ||
| name = "pallet-evm-chain-id" | ||
| version = "1.0.0-dev" | ||
| authors = ["Parity Technologies <admin@parity.io>"] | ||
| edition = "2021" | ||
| license = "Apache-2.0" | ||
| readme = "README.md" | ||
| description = "EVM chain id storage pallet" | ||
| repository = "https://github.com/paritytech/frontier/" | ||
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| [package.metadata.docs.rs] | ||
| targets = ["x86_64-unknown-linux-gnu"] | ||
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| [dependencies] | ||
| serde = { version = "1.0", features = ["derive"], optional = true } | ||
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| # Parity | ||
| codec = { package = "parity-scale-codec", version = "3.1", default-features = false, features = ["derive"] } | ||
| scale-info = { version = "2.1", default-features = false, features = ["derive"] } | ||
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| # Substrate FRAME | ||
| frame-support = { version = "4.0.0-dev", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false } | ||
| frame-system = { version = "4.0.0-dev", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false } | ||
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| [features] | ||
| default = ["std"] | ||
| std = [ | ||
| "serde", | ||
| # Parity | ||
| "codec/std", | ||
| "scale-info/std", | ||
| # Substrate FRAME | ||
| "frame-support/std", | ||
| "frame-system/std", | ||
| ] | ||
| try-runtime = ["frame-support/try-runtime"] |
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| // SPDX-License-Identifier: Apache-2.0 | ||
| // This file is part of Frontier. | ||
| // | ||
| // Copyright (c) 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 chain ID pallet | ||
| //! | ||
| //! The pallet that stores the numeric Ethereum-style chain id in the runtime. | ||
| //! It can simplify setting up multiple networks with different chain ID by configuring the | ||
| //! chain spec without requiring changes to the runtime config. | ||
| //! | ||
| //! **NOTE**: we recommend that the production chains still use the const parameter type, as | ||
| //! this extra storage access would imply some performance penalty. | ||
| // Ensure we're `no_std` when compiling for Wasm. | ||
| #![cfg_attr(not(feature = "std"), no_std)] | ||
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| pub use pallet::*; | ||
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| #[frame_support::pallet] | ||
| pub mod pallet { | ||
| use frame_support::pallet_prelude::*; | ||
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| const STORAGE_VERSION: StorageVersion = StorageVersion::new(0); | ||
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| #[pallet::pallet] | ||
| #[pallet::storage_version(STORAGE_VERSION)] | ||
| pub struct Pallet<T>(PhantomData<T>); | ||
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| #[pallet::config] | ||
| pub trait Config: frame_system::Config {} | ||
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| impl<T: Config> Get<u64> for Pallet<T> { | ||
| fn get() -> u64 { | ||
| Self::chain_id() | ||
| } | ||
| } | ||
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| /// The EVM chain ID. | ||
| #[pallet::storage] | ||
| #[pallet::getter(fn chain_id)] | ||
| pub type ChainId<T> = StorageValue<_, u64, ValueQuery>; | ||
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| #[pallet::genesis_config] | ||
| #[derive(Default)] | ||
| pub struct GenesisConfig { | ||
| pub chain_id: u64, | ||
| } | ||
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| #[pallet::genesis_build] | ||
| impl<T: Config> GenesisBuild<T> for GenesisConfig { | ||
| fn build(&self) { | ||
| ChainId::<T>::put(self.chain_id); | ||
| } | ||
| } | ||
| } |
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