# QueryPendingReplacements

This is the interface to query the size of idle space that can be deleted by storage miners, only after storing a service file.

```golang
// QueryPendingReplacements query the size of the storage miner's replaceable idle data
//   - accountID: storage miner account
//   - block: block number, less than 0 indicates the latest block
//
// Return:
//   - types.U128: the size of replaceable idle data
//   - error: error message
func (c *ChainClient) QueryPendingReplacements(accountID []byte, block int32) (types.U128, error)
```

Example code:

```golang
package main

import (
    "context"
    "fmt"
    "time"

    sdkgo "github.com/CESSProject/cess-go-sdk"
    "github.com/CESSProject/cess-go-sdk/utils"
)

var RPC_ADDRS = []string{
    //testnet
    "wss://testnet-rpc.cess.network/ws/",
}

func main() {
    sdk, err := sdkgo.New(
        context.Background(),
        sdkgo.ConnectRpcAddrs(RPC_ADDRS),
    )
    if err != nil {
        panic(err)
    }
    defer sdk.Close()

    account_id, err := utils.ParsingPublickey("cX...")
    if err != nil {
        panic(err)
    }

    fmt.Println(sdk.QueryPendingReplacements(account_id, -1))
}
```


---

# 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-golang/chain_related/sminer/querypendingreplacements.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.