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Adds state_queryStorageAt (#5362)

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* adds state_queryStorageAt

* make at param for query_storage_at optional

* Update client/rpc/src/state/state_full.rs

Co-Authored-By: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

* adds query_storage_at to StateBackend

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>
This commit is contained in:
Seun Lanlege
2020-03-26 16:03:34 +01:00
committed by GitHub
parent 970c5f94f2
commit ab0f7d213a
5 changed files with 88 additions and 10 deletions
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substrate/client/rpc/src/state/state_full.rs
+16 -4
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@@ -33,7 +33,7 @@ use sp_core::{
};
use sp_version::RuntimeVersion;
use sp_runtime::{
generic::BlockId, traits::{Block as BlockT, NumberFor, SaturatedConversion},
generic::BlockId, traits::{Block as BlockT, NumberFor, SaturatedConversion, CheckedSub},
};
use sp_api::{Metadata, ProvideRuntimeApi, CallApiAt};
@@ -94,8 +94,8 @@ impl<BE, Block: BlockT, Client> FullState<BE, Block, Client>
let from_meta = self.client.header_metadata(from).map_err(invalid_block_err)?;
let to_meta = self.client.header_metadata(to).map_err(invalid_block_err)?;
if from_meta.number >= to_meta.number {
return Err(invalid_block_range(&from_meta, &to_meta, "from number >= to number".to_owned()))
if from_meta.number > to_meta.number {
return Err(invalid_block_range(&from_meta, &to_meta, "from number > to number".to_owned()))
}
// check if we can get from `to` to `from` by going through parent_hashes.
@@ -122,7 +122,10 @@ impl<BE, Block: BlockT, Client> FullState<BE, Block, Client>
.max_key_changes_range(from_number, BlockId::Hash(to_meta.hash))
.map_err(client_err)?;
let filtered_range_begin = changes_trie_range
.map(|(begin, _)| (begin - from_number).saturated_into::<usize>());
.and_then(|(begin, _)| {
// avoids a corner case where begin < from_number (happens when querying genesis)
begin.checked_sub(&from_number).map(|x| x.saturated_into::<usize>())
});
let (unfiltered_range, filtered_range) = split_range(hashes.len(), filtered_range_begin);
Ok(QueryStorageRange {
@@ -398,6 +401,15 @@ impl<BE, Block, Client> StateBackend<Block, Client> for FullState<BE, Block, Cli
Box::new(result(call_fn()))
}
fn query_storage_at(
&self,
keys: Vec<StorageKey>,
at: Option<Block::Hash>
) -> FutureResult<Vec<StorageChangeSet<Block::Hash>>> {
let at = at.unwrap_or_else(|| self.client.info().best_hash);
self.query_storage(at, Some(at), keys)
}
fn subscribe_runtime_version(
&self,
_meta: crate::metadata::Metadata,