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try-runtime::fast-forward (paritytech#12896)
* try-runtime::fast-forward * Revert un`pub`ing command's fields * Handle storage change failure * Adjust Substrate node * Feature-gated imports * doc link * Feature-gated imports in node-template * Move trait, blanket implementation and auxiliary functions to a new module * Distinguish between plain babe+timestamp and substrate enhanced info * Remove uncles inherents * Missing argument * Add doc comment about `blocktime_millis` * Add licenses
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| Original file line number | Diff line number | Diff line change |
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| // This file is part of Substrate. | ||
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| // Copyright (C) 2021-2022 Parity Technologies (UK) Ltd. | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
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| // 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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| use crate::BlockT; | ||
| use parity_scale_codec::Encode; | ||
| use sc_cli::Result; | ||
| use sp_consensus_aura::{Slot, SlotDuration, AURA_ENGINE_ID}; | ||
| use sp_consensus_babe::{ | ||
| digests::{PreDigest, SecondaryPlainPreDigest}, | ||
| BABE_ENGINE_ID, | ||
| }; | ||
| use sp_inherents::{InherentData, InherentDataProvider}; | ||
| use sp_runtime::{Digest, DigestItem}; | ||
| use sp_timestamp::TimestampInherentData; | ||
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| /// Something that can create inherent data providers and pre-runtime digest. | ||
| /// | ||
| /// It is possible for the caller to provide custom arguments to the callee by setting the | ||
| /// `ExtraArgs` generic parameter. | ||
| /// | ||
| /// This module already provides some convenience implementation of this trait for closures. So, it | ||
| /// should not be required to implement it directly. | ||
| #[async_trait::async_trait] | ||
| pub trait BlockBuildingInfoProvider<Block: BlockT, ExtraArgs = ()> { | ||
| type InherentDataProviders: InherentDataProvider; | ||
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| async fn get_inherent_providers_and_pre_digest( | ||
| &self, | ||
| parent_hash: Block::Hash, | ||
| extra_args: ExtraArgs, | ||
| ) -> Result<(Self::InherentDataProviders, Vec<DigestItem>)>; | ||
| } | ||
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| #[async_trait::async_trait] | ||
| impl<F, Block, IDP, ExtraArgs, Fut> BlockBuildingInfoProvider<Block, ExtraArgs> for F | ||
| where | ||
| Block: BlockT, | ||
| F: Fn(Block::Hash, ExtraArgs) -> Fut + Sync + Send, | ||
| Fut: std::future::Future<Output = Result<(IDP, Vec<DigestItem>)>> + Send + 'static, | ||
| IDP: InherentDataProvider + 'static, | ||
| ExtraArgs: Send + 'static, | ||
| { | ||
| type InherentDataProviders = IDP; | ||
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| async fn get_inherent_providers_and_pre_digest( | ||
| &self, | ||
| parent: Block::Hash, | ||
| extra_args: ExtraArgs, | ||
| ) -> Result<(Self::InherentDataProviders, Vec<DigestItem>)> { | ||
| (*self)(parent, extra_args).await | ||
| } | ||
| } | ||
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| /// Provides [`BlockBuildingInfoProvider`] implementation for chains that include timestamp inherent | ||
| /// and use Aura for a block production. | ||
| /// | ||
| /// It depends only on the expected block production frequency, i.e. `blocktime_millis`. | ||
| pub fn timestamp_with_aura_info<Block: BlockT>( | ||
| blocktime_millis: u64, | ||
| ) -> impl BlockBuildingInfoProvider<Block, Option<(InherentData, Digest)>> { | ||
| move |_, maybe_prev_info: Option<(InherentData, Digest)>| async move { | ||
| let timestamp_idp = match maybe_prev_info { | ||
| Some((inherent_data, _)) => sp_timestamp::InherentDataProvider::new( | ||
| inherent_data.timestamp_inherent_data().unwrap().unwrap() + blocktime_millis, | ||
| ), | ||
| None => sp_timestamp::InherentDataProvider::from_system_time(), | ||
| }; | ||
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| let slot = | ||
| Slot::from_timestamp(*timestamp_idp, SlotDuration::from_millis(blocktime_millis)); | ||
| let digest = vec![DigestItem::PreRuntime(AURA_ENGINE_ID, slot.encode())]; | ||
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| Ok((timestamp_idp, digest)) | ||
| } | ||
| } | ||
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| /// Provides [`BlockBuildingInfoProvider`] implementation for chains that include timestamp inherent | ||
| /// and use Babe for a block production. | ||
| /// | ||
| /// It depends only on the expected block production frequency, i.e. `blocktime_millis`. | ||
| pub fn timestamp_with_babe_info<Block: BlockT>( | ||
| blocktime_millis: u64, | ||
| ) -> impl BlockBuildingInfoProvider<Block, Option<(InherentData, Digest)>> { | ||
| move |_, maybe_prev_info: Option<(InherentData, Digest)>| async move { | ||
| let timestamp_idp = match maybe_prev_info { | ||
| Some((inherent_data, _)) => sp_timestamp::InherentDataProvider::new( | ||
| inherent_data.timestamp_inherent_data().unwrap().unwrap() + blocktime_millis, | ||
| ), | ||
| None => sp_timestamp::InherentDataProvider::from_system_time(), | ||
| }; | ||
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| let slot = | ||
| Slot::from_timestamp(*timestamp_idp, SlotDuration::from_millis(blocktime_millis)); | ||
| let slot_idp = sp_consensus_babe::inherents::InherentDataProvider::new(slot); | ||
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| let digest = vec![DigestItem::PreRuntime( | ||
| BABE_ENGINE_ID, | ||
| PreDigest::SecondaryPlain(SecondaryPlainPreDigest { slot, authority_index: 0 }) | ||
| .encode(), | ||
| )]; | ||
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| Ok(((slot_idp, timestamp_idp), digest)) | ||
| } | ||
| } | ||
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| /// Provides [`BlockBuildingInfoProvider`] implementation for chains that use: | ||
| /// - timestamp inherent, | ||
| /// - Babe for a block production (inherent + digest), | ||
| /// - uncles inherent, | ||
| /// - storage proof inherent | ||
| /// | ||
| /// It depends only on the expected block production frequency, i.e. `blocktime_millis`. | ||
| pub fn substrate_info<Block: BlockT>( | ||
| blocktime_millis: u64, | ||
| ) -> impl BlockBuildingInfoProvider<Block, Option<(InherentData, Digest)>> { | ||
| move |_, maybe_prev_info: Option<(InherentData, Digest)>| async move { | ||
| let timestamp_idp = match maybe_prev_info { | ||
| Some((inherent_data, _)) => sp_timestamp::InherentDataProvider::new( | ||
| inherent_data.timestamp_inherent_data().unwrap().unwrap() + blocktime_millis, | ||
| ), | ||
| None => sp_timestamp::InherentDataProvider::from_system_time(), | ||
| }; | ||
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| let slot = | ||
| Slot::from_timestamp(*timestamp_idp, SlotDuration::from_millis(blocktime_millis)); | ||
| let slot_idp = sp_consensus_babe::inherents::InherentDataProvider::new(slot); | ||
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| let storage_proof_idp = sp_transaction_storage_proof::InherentDataProvider::new(None); | ||
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| let digest = vec![DigestItem::PreRuntime( | ||
| BABE_ENGINE_ID, | ||
| PreDigest::SecondaryPlain(SecondaryPlainPreDigest { slot, authority_index: 0 }) | ||
| .encode(), | ||
| )]; | ||
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| Ok(((slot_idp, timestamp_idp, storage_proof_idp), digest)) | ||
| } | ||
| } |
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