> For the complete documentation index, see [llms.txt](https://docs.triton.one/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.triton.one/solana/rpc-methods/utility-methods/getlatestblockhash.md).

# getLatestBlockhash

Returns the latest blockhash and lastValidBlockHeight at the requested commitment, with optional minContextSlot.

{% hint style="info" %}
On Triton's Solana mainnet endpoints, shared and dedicated, the load balancer answers a single `getLatestBlockhash` request from a continuously refreshed cache. It reads `commitment` and `minContextSlot` and ignores other config fields. If the cached value is more than about 2 seconds old, or doesn't reach your `minContextSlot`, the request goes to an RPC node.
{% endhint %}

## Request

{% tabs %}
{% tab title="cURL" %}

```bash
curl "https://<your-endpoint>.mainnet.rpcpool.com/<your-token>" -s -X POST \
  -H "Content-Type: application/json" \
  -d '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getLatestBlockhash",
  "params": [
    {
      "commitment": "processed"
    }
  ]
}'
```

{% endtab %}

{% tab title="Kit" %}

```typescript
import { createSolanaRpc, type Commitment } from "@solana/kit";

const rpc_url = "https://<your-endpoint>.mainnet.rpcpool.com/<your-token>";
const rpc = createSolanaRpc(rpc_url);

let commitment: Commitment = "processed";
let latestBlockhash = await rpc.getLatestBlockhash({ commitment }).send();

console.log(latestBlockhash);
```

{% endtab %}

{% tab title="web3.js" %}

```typescript
import { Connection, type Commitment } from "@solana/web3.js";

const connection = new Connection("https://<your-endpoint>.mainnet.rpcpool.com/<your-token>", "confirmed");

let commitment: Commitment = "processed";
let latestBlockhash = await connection.getLatestBlockhash(commitment);

console.log(latestBlockhash);
```

{% endtab %}

{% tab title="Rust" %}

```rust
// Cargo.toml: anyhow = "1", solana-client = "~4.4", solana-commitment-config = "3",
// tokio = { version = "1", features = ["full"] }.
// Requires Rust 1.98.1 or newer (solana-client 4.4).
use anyhow::Result;
use solana_client::nonblocking::rpc_client::RpcClient;
use solana_commitment_config::CommitmentConfig;

#[tokio::main]
async fn main() -> Result<()> {
    let client = RpcClient::new_with_commitment(
        String::from("https://<your-endpoint>.mainnet.rpcpool.com/<your-token>"),
        CommitmentConfig::confirmed(),
    );

    let commitment = CommitmentConfig::processed();
    let latest_blockhash = client
        .get_latest_blockhash_with_commitment(commitment)
        .await?;

    println!("{:#?}", latest_blockhash);

    Ok(())
}
```

{% endtab %}
{% endtabs %}

## Parameters

**`config`** · object · optional

Configuration object containing the following fields:

**`commitment`** · string · default `finalized`

Values: `processed`, `confirmed`, `finalized`

Solana RPC uses the following commitment levels:

| Value       | Description                                                                                                                                                                        |
| ----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `processed` | Return data from the highest slot this node has processed on the fork it currently considers best. This is the newest view, but it can still change if the cluster switches forks. |
| `confirmed` | Return data from the highest slot the cluster has finalized. On Alpenglow, `confirmed` and `finalized` are the same level.                                                         |
| `finalized` | Return data from the highest slot that the cluster has finalized. On Alpenglow there are no vote towers or lockouts: a slot is finalized by certificates of aggregated votes.      |

**`minContextSlot`** · number

The minimum slot that the request can be evaluated at

## Response

```json
{
  "jsonrpc": "2.0",
  "result": {
    "context": {
      "apiVersion": "4.3.2",
      "slot": 2792
    },
    "value": {
      "blockhash": "EkSnNWid2cvwEVnVx9aBqawnmiCNiDgp3gUdkDPTKN1N",
      "lastValidBlockHeight": 3090
    }
  },
  "id": 1
}
```

## Result

RpcResponse object containing:

**`context`** · object

Slot and API version the node used to answer this request.

| Field        | Type     | Description                                                                     |
| ------------ | -------- | ------------------------------------------------------------------------------- |
| `slot`       | `u64`    | Slot at which the node evaluated this request.                                  |
| `apiVersion` | `string` | RPC API version reported by the node. This field may be omitted by older nodes. |

**`value`** · object

Latest blockhash response object with the following fields:

| Field                  | Type     | Description                                                                                                                                                            |
| ---------------------- | -------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `blockhash`            | `string` | Latest blockhash, as a base-58 encoded string.                                                                                                                         |
| `lastValidBlockHeight` | `u64`    | The highest [block height](https://solana.com/docs/references/terminology#block-height) at which a transaction that uses this blockhash can land is this value plus 1. |

***

*Adapted from the* [*Solana `getLatestBlockhash` reference*](https://solana.com/docs/rpc/http/getlatestblockhash)*, maintained by the Solana Foundation.*

***

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