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add state_getKeysPaged (#4718)

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* add storage_getNextKey

* RPC storage_getKeysPages

* respect count

* use iterator

* improve

* add tests

* improve

* add doc comments

* Make prefix optional

* update error

* improve
This commit is contained in:
Xiliang Chen
2020-02-04 22:44:40 +13:00
committed by GitHub
parent 900295b020
commit febb6e29b2
6 changed files with 199 additions and 3 deletions
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substrate/client/rpc/src/state/state_full.rs
+18
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@@ -254,6 +254,24 @@ impl<B, E, Block, RA> StateBackend<B, E, Block, RA> for FullState<B, E, Block, R
.map_err(client_err)))
}
fn storage_keys_paged(
&self,
block: Option<Block::Hash>,
prefix: Option<StorageKey>,
count: u32,
start_key: Option<StorageKey>,
) -> FutureResult<Vec<StorageKey>> {
Box::new(result(
self.block_or_best(block)
.and_then(|block|
self.client.storage_keys_iter(
&BlockId::Hash(block), prefix.as_ref(), start_key.as_ref()
)
)
.map(|v| v.take(count as usize).collect())
.map_err(client_err)))
}
fn storage(
&self,
block: Option<Block::Hash>,