mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-05-01 17:07:56 +00:00
Vivek Pandya
bc53b9a03a
* Change copyright year to 2023 from 2022 * Fix incorrect update of copyright year * Remove years from copy right header * Fix remaining files * Fix typo in a header and remove update-copyright.sh
76 lines
2.4 KiB
Rust
76 lines
2.4 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use crate::{Config, Pallet};
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use codec::{Decode, Encode};
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use scale_info::TypeInfo;
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use sp_runtime::{
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traits::{DispatchInfoOf, SignedExtension, Zero},
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transaction_validity::TransactionValidityError,
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};
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/// Genesis hash check to provide replay protection between different networks.
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///
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/// # Transaction Validity
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///
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/// Note that while a transaction with invalid `genesis_hash` will fail to be decoded,
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/// the extension does not affect any other fields of `TransactionValidity` directly.
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#[derive(Encode, Decode, Clone, Eq, PartialEq, TypeInfo)]
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#[scale_info(skip_type_params(T))]
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pub struct CheckGenesis<T: Config + Send + Sync>(sp_std::marker::PhantomData<T>);
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impl<T: Config + Send + Sync> sp_std::fmt::Debug for CheckGenesis<T> {
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#[cfg(feature = "std")]
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fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
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write!(f, "CheckGenesis")
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}
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#[cfg(not(feature = "std"))]
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fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
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Ok(())
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}
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}
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impl<T: Config + Send + Sync> CheckGenesis<T> {
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/// Creates new `SignedExtension` to check genesis hash.
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pub fn new() -> Self {
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Self(sp_std::marker::PhantomData)
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}
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}
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impl<T: Config + Send + Sync> SignedExtension for CheckGenesis<T> {
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type AccountId = T::AccountId;
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type Call = <T as Config>::RuntimeCall;
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type AdditionalSigned = T::Hash;
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type Pre = ();
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const IDENTIFIER: &'static str = "CheckGenesis";
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fn additional_signed(&self) -> Result<Self::AdditionalSigned, TransactionValidityError> {
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Ok(<Pallet<T>>::block_hash(T::BlockNumber::zero()))
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}
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fn pre_dispatch(
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self,
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who: &Self::AccountId,
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call: &Self::Call,
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info: &DispatchInfoOf<Self::Call>,
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len: usize,
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) -> Result<Self::Pre, TransactionValidityError> {
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self.validate(who, call, info, len).map(|_| ())
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}
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}
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