# Restoral Order

The `restoral_order` is used to query the file recovery order, the storage miner can store more files by recovering the files in this order.

```rust
/// Asynchronously queries the restoral order for file recovery.
/// 
/// This function allows storage miners to determine the order in which files
/// should be recovered. By following this order, storage miners can optimize
/// their storage capacity and store more files efficiently.
/// 
/// # Parameters
/// 
/// - `hash`: A reference to a string slice that represents the identifier hash of the file.
/// - `block_hash`: An optional parameter specifying a block hash of type `H256`. 
///   If provided, the function will retrieve the restoral order as of the specified block.
/// 
/// # Returns
/// 
/// - `Result<Option<RestoralOrderInfo>, Box<dyn std::error::Error>>`: 
///   The function returns a `Result` which on success contains an `Option`:
///   - `Some(RestoralOrderInfo)` if the restoral order information is found.
///   - `None` if no restoral order information is available for the given hash.
///   On failure, it returns an error wrapped in a `Box<dyn std::error::Error>`.
/// 
pub async fn restoral_order(
    hash: &str,
    block_hash: Option<H256>,
) -> Result<Option<RestoralOrderInfo>, Box<dyn std::error::Error>>
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://doc.cess.network/developer/cess-sdk/sdk-rust/chain/file_bank/restoral_order.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.