> ## 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.

# signatureSubscribe

> Subscribe to receive a notification when the transaction with the given signature reaches the specified commitment level.

### 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="signatureSubscribe" required>
  JSON-RPC method name.
</ParamField>

<ParamField body="params" type="object" default={["2EBVM6cB8vAAD93Ktr6Vd8p67XPbQzCJX47MpReuiCXJAtcjaxpvWpcg9Ege1Nr5Tk3a2GFrByT7WPBjdsTycY9b",{"commitment":"finalized","enableReceivedNotification":false}]} placeholder="[&#x22;2EBVM6cB8vAAD93Ktr6Vd8p67XPbQzCJX47MpReuiCXJAtcjaxpvWpcg9Ege1Nr5Tk3a2GFrByT7WPBjdsTycY9b&#x22;,{&#x22;commitment&#x22;:&#x22;finalized&#x22;,&#x22;enableReceivedNotification&#x22;:false}]" required>
  Parameters for method signatureSubscribe: \[transactionSignature, config]

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

  <ul>
    <li><code>params\[0]</code>: Transaction signature to subscribe to (base-58 encoded string). Must be the first signature from the transaction.</li>
    <li><code>params\[1]</code>: Optional configuration object.</li>
  </ul>
</ParamField>

### Returns

<ResponseField name="result" type="integer">
  Subscription ID returned for the signature subscription (used for unsubscribing). Example: <code>4567</code>.
</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": "signatureSubscribe",
      "params": [
        "2EBVM6cB8vAAD93Ktr6Vd8p67XPbQzCJX47MpReuiCXJAtcjaxpvWpcg9Ege1Nr5Tk3a2GFrByT7WPBjdsTycY9b",
        {
          "commitment": "finalized",
          "enableReceivedNotification": false
        }
      ]
    }'
  ```
</RequestExample>

<ResponseExample>
  ```json Success theme={null}
  {
    "jsonrpc": "2.0",
    "id": 1,
    "result": 4567
  }
  ```
</ResponseExample>