Grcov report - lib.rs

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// Copyright 2019-2022 PureStake Inc.

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// This file is part of Moonbeam.

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// Moonbeam is free software: you can redistribute it and/or modify

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// it under the terms of the GNU General Public License as published by

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// the Free Software Foundation, either version 3 of the License, or

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// (at your option) any later version.

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// Moonbeam is distributed in the hope that it will be useful,

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// but WITHOUT ANY WARRANTY; without even the implied warranty of

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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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// GNU General Public License for more details.

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// You should have received a copy of the GNU General Public License

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// along with Moonbeam.  If not, see <http://www.gnu.org/licenses/>.

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//! Precompile to interact with pallet author mapping through an evm precompile.

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#![cfg_attr(not(feature = "std"), no_std)]

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use fp_evm::PrecompileHandle;

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use frame_support::{

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	dispatch::{GetDispatchInfo, PostDispatchInfo},

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	traits::Get,

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};

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use nimbus_primitives::NimbusId;

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use pallet_author_mapping::Call as AuthorMappingCall;

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use pallet_evm::AddressMapping;

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use parity_scale_codec::Encode;

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use precompile_utils::prelude::*;

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use sp_core::crypto::UncheckedFrom;

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use sp_core::{H160, H256};

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use sp_runtime::traits::Dispatchable;

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use sp_std::marker::PhantomData;

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#[cfg(test)]

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mod mock;

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#[cfg(test)]

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mod tests;

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/// A precompile to wrap the functionality from pallet author mapping.

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pub struct AuthorMappingPrecompile<Runtime>(PhantomData<Runtime>);

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/// Bound for the keys size.

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/// Pallet will check that the size exactly matches, but we want to bound the parser to

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/// not accept larger bytes.

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pub struct GetKeysSize<R>(PhantomData<R>);

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impl<R: pallet_author_mapping::Config> Get<u32> for GetKeysSize<R> {

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3

	fn get() -> u32 {

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		pallet_author_mapping::pallet::keys_size::<R>()

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			.try_into()

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			.expect("keys size to fit in u32")

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3

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#[precompile_utils::precompile]

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#[precompile::test_concrete_types(mock::Runtime)]

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impl<Runtime> AuthorMappingPrecompile<Runtime>

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where

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	Runtime: pallet_author_mapping::Config + pallet_evm::Config + frame_system::Config,

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	Runtime::RuntimeCall: Dispatchable<PostInfo = PostDispatchInfo> + GetDispatchInfo,

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	<Runtime::RuntimeCall as Dispatchable>::RuntimeOrigin: From<Option<Runtime::AccountId>>,

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	Runtime::RuntimeCall: From<AuthorMappingCall<Runtime>>,

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	Runtime::Hash: From<H256>,

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	Runtime::AccountId: Into<H160>,

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	// The dispatchable wrappers are next. They dispatch a Substrate inner Call.

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	#[precompile::public("addAssociation(bytes32)")]

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	#[precompile::public("add_association(bytes32)")]

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2

	fn add_association(handle: &mut impl PrecompileHandle, nimbus_id: H256) -> EvmResult {

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		let nimbus_id = sp_core::sr25519::Public::unchecked_from(nimbus_id).into();

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2

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		log::trace!(

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			target: "author-mapping-precompile",

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			"Associating author id {:?}", nimbus_id

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);

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		let origin = Runtime::AddressMapping::into_account_id(handle.context().caller);

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		let call = AuthorMappingCall::<Runtime>::add_association { nimbus_id };

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2

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		RuntimeHelper::<Runtime>::try_dispatch(handle, Some(origin).into(), call, 0)?;

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		Ok(())

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2

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	#[precompile::public("updateAssociation(bytes32,bytes32)")]

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	#[precompile::public("update_association(bytes32,bytes32)")]

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	fn update_association(

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		handle: &mut impl PrecompileHandle,

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		old_nimbus_id: H256,

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		new_nimbus_id: H256,

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	) -> EvmResult {

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		let old_nimbus_id = sp_core::sr25519::Public::unchecked_from(old_nimbus_id).into();

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		let new_nimbus_id = sp_core::sr25519::Public::unchecked_from(new_nimbus_id).into();

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2

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		log::trace!(

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			target: "author-mapping-precompile",

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			"Updating author id {:?} for {:?}", old_nimbus_id, new_nimbus_id

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);

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		let origin = Runtime::AddressMapping::into_account_id(handle.context().caller);

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		let call = AuthorMappingCall::<Runtime>::update_association {

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			old_nimbus_id,

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			new_nimbus_id,

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};

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		RuntimeHelper::<Runtime>::try_dispatch(handle, Some(origin).into(), call, 0)?;

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		Ok(())

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	#[precompile::public("clearAssociation(bytes32)")]

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	#[precompile::public("clear_association(bytes32)")]

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	fn clear_association(handle: &mut impl PrecompileHandle, nimbus_id: H256) -> EvmResult {

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		let nimbus_id = sp_core::sr25519::Public::unchecked_from(nimbus_id).into();

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		log::trace!(

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			target: "author-mapping-precompile",

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			"Clearing author id {:?}", nimbus_id

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);

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		let origin = Runtime::AddressMapping::into_account_id(handle.context().caller);

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		let call = AuthorMappingCall::<Runtime>::clear_association { nimbus_id };

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		RuntimeHelper::<Runtime>::try_dispatch(handle, Some(origin).into(), call, 0)?;

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		Ok(())

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2

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	#[precompile::public("removeKeys()")]

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	#[precompile::public("remove_keys()")]

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	fn remove_keys(handle: &mut impl PrecompileHandle) -> EvmResult {

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		log::trace!(

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			target: "author-mapping-precompile",

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			"Removing keys"

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);

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		let origin = Runtime::AddressMapping::into_account_id(handle.context().caller);

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		let call = AuthorMappingCall::<Runtime>::remove_keys {};

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1

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		RuntimeHelper::<Runtime>::try_dispatch(handle, Some(origin).into(), call, 0)?;

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		Ok(())

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	#[precompile::public("setKeys(bytes)")]

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	#[precompile::public("set_keys(bytes)")]

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	fn set_keys(

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		handle: &mut impl PrecompileHandle,

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		keys: BoundedBytes<GetKeysSize<Runtime>>,

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	) -> EvmResult {

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		let origin = Runtime::AddressMapping::into_account_id(handle.context().caller);

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		let call = AuthorMappingCall::<Runtime>::set_keys { keys: keys.into() };

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		RuntimeHelper::<Runtime>::try_dispatch(handle, Some(origin).into(), call, 0)?;

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		Ok(())

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	#[precompile::public("nimbusIdOf(address)")]

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	#[precompile::view]

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	fn nimbus_id_of(handle: &mut impl PrecompileHandle, address: Address) -> EvmResult<H256> {

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		// Storage item: NimbusLookup:

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		// Blake2_128(16) + AccountId(20) + NimbusId(32)

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		handle.record_db_read::<Runtime>(68)?;

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		let account = Runtime::AddressMapping::into_account_id(address.0);

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		let nimbus_id = pallet_author_mapping::Pallet::<Runtime>::nimbus_id_of(&account)

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			.map(|x| H256::from(sp_core::sr25519::Public::from(x).0))

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			.unwrap_or(H256::zero());

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		Ok(nimbus_id)

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	#[precompile::public("addressOf(bytes32)")]

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	#[precompile::view]

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	fn address_of(handle: &mut impl PrecompileHandle, nimbus_id: H256) -> EvmResult<Address> {

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		// Storage item: MappingWithDeposit:

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		// Blake2_128(16) + NimbusId(32) + RegistrationInfo(20 + 16 + VrfId(32))

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		handle.record_db_read::<Runtime>(116)?;

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		let nimbus_id = sp_core::sr25519::Public::unchecked_from(nimbus_id);

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		let nimbus_id: NimbusId = nimbus_id.into();

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		let address: H160 = pallet_author_mapping::Pallet::<Runtime>::account_id_of(&nimbus_id)

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			.map(|x| x.into())

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			.unwrap_or(H160::zero());

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		Ok(Address(address))

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	#[precompile::public("keysOf(bytes32)")]

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	#[precompile::view]

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	fn keys_of(handle: &mut impl PrecompileHandle, nimbus_id: H256) -> EvmResult<UnboundedBytes> {

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		// Storage item: MappingWithDeposit:

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		// Blake2_128(16) + NimbusId(32) + RegistrationInfo(20 + 16 + VrfId(32))

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		handle.record_db_read::<Runtime>(116)?;

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		let nimbus_id = sp_core::sr25519::Public::unchecked_from(nimbus_id);

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		let nimbus_id: NimbusId = nimbus_id.into();

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		let keys = pallet_author_mapping::Pallet::<Runtime>::keys_of(&nimbus_id)

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			.map(|x| x.encode())

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			.unwrap_or_default();

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		Ok(keys.into())

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