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Dynamically generate CHT roots on a full client (#6944)

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* Generate CHT roots on a full client

* add changes_trie_root function

* Add a test

* Line widths

* Fix sc-service-test

* Clarify comments

* Revert comments
This commit is contained in:
Ashley
2020-08-24 15:11:21 +02:00
committed by GitHub
parent f009f6c227
commit c8ca2ce183
8 changed files with 139 additions and 56 deletions
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substrate/client/service/src/chain_ops/build_spec.rs
+5 -26
View File
@@ -16,31 +16,9 @@
use sp_runtime::traits::{Block as BlockT, NumberFor, Saturating, One};
use sp_blockchain::HeaderBackend;
use crate::{TFullBackend, TLightBackend};
use std::sync::Arc;
use sp_runtime::generic::BlockId;
/// An error for if this function is being called on a full node.
pub const CHT_ROOT_ERROR: &str =
"Backend doesn't store CHT roots. Make sure you're calling this on a light client.";
/// Something that might allow access to a `ChtRootStorage`.
pub trait MaybeChtRootStorageProvider<Block> {
/// Potentially get a reference to a `ChtRootStorage`.
fn cht_root_storage(&self) -> Option<&dyn sc_client_api::light::ChtRootStorage<Block>>;
}
impl<Block: BlockT> MaybeChtRootStorageProvider<Block> for TFullBackend<Block> {
fn cht_root_storage(&self) -> Option<&dyn sc_client_api::light::ChtRootStorage<Block>> {
None
}
}
impl<Block: BlockT> MaybeChtRootStorageProvider<Block> for TLightBackend<Block> {
fn cht_root_storage(&self) -> Option<&dyn sc_client_api::light::ChtRootStorage<Block>> {
Some(self.blockchain().storage())
}
}
use sc_client_api::ProvideChtRoots;
/// Build a `LightSyncState` from the CHT roots stored in a backend.
pub fn build_light_sync_state<TBl, TCl, TBackend>(
@@ -50,9 +28,10 @@ pub fn build_light_sync_state<TBl, TCl, TBackend>(
where
TBl: BlockT,
TCl: HeaderBackend<TBl>,
TBackend: MaybeChtRootStorageProvider<TBl>,
TBackend: sc_client_api::Backend<TBl>,
<TBackend as sc_client_api::Backend<TBl>>::Blockchain: ProvideChtRoots<TBl>,
{
let storage = backend.cht_root_storage().ok_or(CHT_ROOT_ERROR)?;
let cht_root_provider = backend.blockchain();
let finalized_hash = client.info().finalized_hash;
let finalized_number = client.info().finalized_number;
@@ -67,7 +46,7 @@ pub fn build_light_sync_state<TBl, TCl, TBackend>(
let mut number = NumberFor::<TBl>::one();
while number <= finalized_number.saturating_sub(cht_size_x_2) {
match storage.header_cht_root(cht::size(), number)? {
match cht_root_provider.header_cht_root(cht::size(), number)? {
Some(cht_root) => chts.push(cht_root),
None => log::error!("No CHT found for block {}", number),
}