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Przemek Rzad
bfb241d7f3
* Add missing Cumulus licenses * Typo * Add missing Substrate licenses * Single job checking the sub-repos in steps * Remove dates * Remove dates * Add missing (C) * Update FRAME UI tests Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> * Update more UI tests Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> --------- Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
77 lines
3.0 KiB
Rust
77 lines
3.0 KiB
Rust
// Copyright (C) Parity Technologies (UK) Ltd.
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// This file is part of Cumulus.
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// Cumulus 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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// Cumulus 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 Cumulus. If not, see <http://www.gnu.org/licenses/>.
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//! (unstable) Composable utilities for constructing import queues for parachains.
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//!
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//! Unlike standalone chains, parachains have the requirement that all consensus logic
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//! must be checked within the runtime. This property means that work which is normally
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//! done in the import queue per-block, such as checking signatures, quorums, and whether
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//! inherent extrinsics were constructed faithfully do not need to be done, per se.
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//!
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//! It may seem that it would be beneficial for the client to do these checks regardless,
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//! but in practice this means that clients would just reject blocks which are _valid_ according
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//! to their Parachain Validation Function, which is the ultimate source of consensus truth.
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//!
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//! However, parachain runtimes expose two different access points for executing blocks
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//! in full nodes versus executing those blocks in the parachain validation environment.
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//! At the time of writing, the inherent and consensus checks in most Cumulus runtimes
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//! are only performed during parachain validation, not full node block execution.
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//!
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//! See <https://github.com/paritytech/cumulus/issues/2436> for details.
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use sp_consensus::error::Error as ConsensusError;
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use sp_runtime::traits::Block as BlockT;
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use sc_consensus::{
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block_import::{BlockImport, BlockImportParams},
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import_queue::{BasicQueue, Verifier},
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};
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use crate::ParachainBlockImportMarker;
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/// A [`Verifier`] for blocks which verifies absolutely nothing.
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///
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/// This should only be used when the runtime is responsible for checking block seals and inherents.
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pub struct VerifyNothing;
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#[async_trait::async_trait]
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impl<Block: BlockT> Verifier<Block> for VerifyNothing {
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async fn verify(
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&mut self,
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params: BlockImportParams<Block>,
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) -> Result<BlockImportParams<Block>, String> {
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Ok(params)
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}
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}
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/// An import queue which does no verification.
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///
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/// This should only be used when the runtime is responsible for checking block seals and inherents.
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pub fn verify_nothing_import_queue<Block: BlockT, I>(
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block_import: I,
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spawner: &impl sp_core::traits::SpawnEssentialNamed,
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registry: Option<&substrate_prometheus_endpoint::Registry>,
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) -> BasicQueue<Block>
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where
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I: BlockImport<Block, Error = ConsensusError>
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+ ParachainBlockImportMarker
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+ Send
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+ Sync
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+ 'static,
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{
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BasicQueue::new(VerifyNothing, Box::new(block_import), None, spawner, registry)
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}
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