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at_latest for runtime API too (#904)

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This commit is contained in:
James Wilson
2023-04-11 16:29:44 +01:00
committed by GitHub
parent 3b9fd72b26
commit 9bcfff3bf4
1 changed files with 13 additions and 11 deletions
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subxt/src/runtime_api/runtime_client.rs
+13 -11
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@@ -31,23 +31,25 @@ where
T: Config,
Client: OnlineClientT<T>,
{
/// Obtain a runtime API at some block hash.
pub fn at(
/// Obtain a runtime API interface at some block hash.
pub fn at(&self, block_hash: T::Hash) -> RuntimeApi<T, Client> {
RuntimeApi::new(self.client.clone(), block_hash)
}
/// Obtain a runtime API interface at the latest block hash.
pub fn at_latest(
&self,
block_hash: Option<T::Hash>,
) -> impl Future<Output = Result<RuntimeApi<T, Client>, Error>> + Send + 'static {
// Clone and pass the client in like this so that we can explicitly
// return a Future that's Send + 'static, rather than tied to &self.
let client = self.client.clone();
async move {
// If block hash is not provided, get the hash
// for the latest block and use that.
let block_hash = match block_hash {
Some(hash) => hash,
None => client.rpc().block_hash(None).await?.expect(
"substrate RPC returns the best block when no block number is provided; qed",
),
};
// get the hash for the latest block and use that.
let block_hash = client
.rpc()
.block_hash(None)
.await?
.expect("didn't pass a block number; qed");
Ok(RuntimeApi::new(client, block_hash))
}