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

# getLatestBlockhash

> Returns the latest blockhash.

### Parameters

<ParamField query="chainId" type="string" default="solana-devnet" required>
  Unique identifier for a blockchain network.
</ParamField>

<ParamField body="id" type="number" default={1} required>
  Request identifier used to match responses.
</ParamField>

<ParamField body="jsonrpc" type="string" default="2.0" required>
  JSON-RPC version.
</ParamField>

<ParamField body="method" type="string" default="getLatestBlockhash" required>
  JSON-RPC method name.
</ParamField>

<ParamField body="params" type="object" default={[{"commitment":"processed"}]} placeholder="[{&#x22;commitment&#x22;:&#x22;processed&#x22;}]">
  Parameters for method getLatestBlockhash: \[config]

  Positional parameters for <code>getLatestBlockhash</code>:

  <ul>
    <li><code>params\[]</code>: Optional configuration object.</li>
  </ul>
</ParamField>

### Returns

<ResponseField name="result" type="object">
  RPC response object containing blockhash info in the value field.

  <Expandable title="properties">
    <ResponseField name="context" type="object">
      Context information including slot.

      <Expandable title="properties">
        <ResponseField name="slot" type="integer">
          Slot at which the blockhash was queried.
        </ResponseField>
      </Expandable>
    </ResponseField>

    <ResponseField name="value" type="object">
      Blockhash information.

      <Expandable title="properties">
        <ResponseField name="blockhash" type="string">
          Blockhash as a base-58 encoded string.
        </ResponseField>

        <ResponseField name="lastValidBlockHeight" type="integer">
          Last block height at which the blockhash will be valid.
        </ResponseField>
      </Expandable>
    </ResponseField>
  </Expandable>
</ResponseField>

<RequestExample>
  ```bash Curl theme={null}
  curl --request POST \
    --url https://api.uniblock.dev/uni/v1/json-rpc?chainId=solana-devnet \
    --header 'content-type: application/json' \
    --data '{
      "id": 1,
      "jsonrpc": "2.0",
      "method": "getLatestBlockhash",
      "params": [
        {
          "commitment": "processed"
        }
      ]
    }'
  ```
</RequestExample>

<ResponseExample>
  ```json Success theme={null}
  {
    "jsonrpc": "2.0",
    "id": 1,
    "result": {
      "context": {
        "slot": 2792
      },
      "value": {
        "blockhash": "EkSnNWid2cvwEVnVx9aBqawnmiCNiDgp3gUdkDPTKN1N",
        "lastValidBlockHeight": 3090
      }
    }
  }
  ```
</ResponseExample>