import {
  DocBlock,
  DocSideBySide,
  CodeParams,
  Parameter,
  Field,
  Values,
  CodeSnippets,
} from "../../../components/CodeDocBlock";

<DocBlock>

## isBlockhashValid

Returns whether a blockhash is still valid or not

:::caution
NEW: This method is only available in solana-core v1.9 or newer. Please use
[getFeeCalculatorForBlockhash](#getfeecalculatorforblockhash) for solana-core v1.8
:::

<DocSideBySide>
<CodeParams>

### Parameters:

<Parameter type={"string"} required={true}>
  the blockhash of the block to evauluate, as base-58 encoded string
</Parameter>

<Parameter type={"object"} optional={true}>

Configuration object containing the following fields:

<Field
  name="commitment"
  type="string"
  optional={true}
  href="/api/http#configuring-state-commitment"
></Field>

<Field name="minContextSlot" type="number" optional={true}>
  The minimum slot that the request can be evaluated at
</Field>

</Parameter>

### Result:

`<bool>` - `true` if the blockhash is still valid

</CodeParams>

<CodeSnippets>

### Code sample:

```bash
curl http://localhost:8899 -X POST -H "Content-Type: application/json" -d '
  {
    "id":45,
    "jsonrpc":"2.0",
    "method":"isBlockhashValid",
    "params":[
      "J7rBdM6AecPDEZp8aPq5iPSNKVkU5Q76F3oAV4eW5wsW",
      {"commitment":"processed"}
    ]
  }
'
```

### Response:

```json
{
  "jsonrpc": "2.0",
  "result": {
    "context": {
      "slot": 2483
    },
    "value": false
  },
  "id": 1
}
```

</CodeSnippets>
</DocSideBySide>
</DocBlock>
