> ## Documentation Index
> Fetch the complete documentation index at: https://goldrush.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# isBlockhashValid on Solana

> Call isBlockhashValid on Solana via GoldRush JSON-RPC. Returns whether a blockhash is still valid. Endpoint, parameters, return values, and code examples.

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`isBlockhashValid` on **Solana**: Returns whether a blockhash is still valid.

## Endpoint

```
https://rpc.goldrushdata.com/v1/solana-mainnet
```

Authenticate with `Authorization: Bearer <GOLDRUSH_API_KEY>`. See [authentication](/goldrush-json-rpc/authentication).

## Parameters

| Name        | Type     | Required | Description                         | Example                                          |
| ----------- | -------- | -------- | ----------------------------------- | ------------------------------------------------ |
| `blockhash` | `string` | yes      | Base-58 encoded blockhash to check. | `"EkSnNWid2cvwEVnVx9aBqawnmiCNiDgp3gUdkDPTKN1N"` |
| `config`    | `object` | no       | `{commitment?, minContextSlot?}`.   | `{"commitment":"processed"}`                     |

## Returns

`object`: `{context, value: boolean}`: `true` if the blockhash is still valid.

```json theme={null}
{"context":{"slot":372877175},"value":false}
```

## Examples

<CodeGroup>
  ```bash curl theme={null}
  curl https://rpc.goldrushdata.com/v1/solana-mainnet \
    -H "Authorization: Bearer $GOLDRUSH_API_KEY" \
    -H "Content-Type: application/json" \
    -d '{
      "jsonrpc": "2.0",
      "id": 1,
      "method": "isBlockhashValid",
      "params": ["EkSnNWid2cvwEVnVx9aBqawnmiCNiDgp3gUdkDPTKN1N", {"commitment":"processed"}]
    }'
  ```

  ```typescript @solana/kit theme={null}
  import {
    createDefaultRpcTransport,
    createSolanaRpcFromTransport,
  } from "@solana/kit";

  const transport = createDefaultRpcTransport({
    url: "https://rpc.goldrushdata.com/v1/solana-mainnet",
    headers: { Authorization: `Bearer ${process.env.GOLDRUSH_API_KEY}` },
  });
  const rpc = createSolanaRpcFromTransport(transport);

  const result = await rpc.isBlockhashValid("EkSnNWid2cvwEVnVx9aBqawnmiCNiDgp3gUdkDPTKN1N", {"commitment":"processed"}).send();
  console.log(result);
  ```

  ```python python theme={null}
  import os
  import requests

  resp = requests.post(
      "https://rpc.goldrushdata.com/v1/solana-mainnet",
      headers={
          "Authorization": f"Bearer {os.environ['GOLDRUSH_API_KEY']}",
          "Content-Type": "application/json",
      },
      json={"jsonrpc": "2.0", "id": 1, "method": "isBlockhashValid", "params": ["EkSnNWid2cvwEVnVx9aBqawnmiCNiDgp3gUdkDPTKN1N", {"commitment":"processed"}]},
  )
  print(resp.json()["result"])
  ```
</CodeGroup>

## Errors

Standard JSON-RPC errors: `-32600` invalid request, `-32601` method not found, `-32602` invalid params.

## Related Blocks info methods on Solana

* [`getBlock` on Solana](/api-reference/json-rpc/solana/getblock)
* [`getBlocks` on Solana](/api-reference/json-rpc/solana/getblocks)
* [`getBlocksWithLimit` on Solana](/api-reference/json-rpc/solana/getblockswithlimit)
* [`getBlockHeight` on Solana](/api-reference/json-rpc/solana/getblockheight)
* [`getBlockTime` on Solana](/api-reference/json-rpc/solana/getblocktime)