signatureSubscribe RPC Method

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

warning

This is a subscription to a single notification. It is automatically cancelled by the server once the notification, signatureNotification, is sent by the RPC.

Parameters

string required transaction signature, as base-58 encoded string

info

The transaction signature must be the first signature from the transaction (see transaction id for more details).

object optional Configuration object containing the following fields:

• commitment string optional
• enableReceivedNotification bool optional Whether or not to subscribe for notifications when signatures are received by the RPC, in addition to when they are processed.

Result

<integer> - subscription id (needed to unsubscribe)

Code sample

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "signatureSubscribe",
  "params": [
    "2EBVM6cB8vAAD93Ktr6Vd8p67XPbQzCJX47MpReuiCXJAtcjaxpvWpcg9Ege1Nr5Tk3a2GFrByT7WPBjdsTycY9b",
    {
      "commitment": "finalized",
      "enableReceivedNotification": false
    }
  ]
}

Response

{ "jsonrpc": "2.0", "result": 0, "id": 1 }

Notification Format:

The notification will be an RpcResponse JSON object with value containing an object with:

• slot: <u64> - The corresponding slot.
• value: <object|string> - a notification value of RpcSignatureResult, resulting in either:
  • when enableReceivedNotification is true and the signature is received: the literal string "receivedSignature", or
  • when the signature is processed: err: <object|null>:
    • null if the transaction succeeded in being processed at the specified commitment level, or
    • a TransactionError, if the transaction failed

Example responses:

The following is an example response of a notification from a successfully processed transactions:

{
  "jsonrpc": "2.0",
  "method": "signatureNotification",
  "params": {
    "result": {
      "context": {
        "slot": 5207624
      },
      "value": {
        "err": null
      }
    },
    "subscription": 24006
  }
}

The following is an example response of a notification from a successfully received transaction signature:

{
  "jsonrpc": "2.0",
  "method": "signatureNotification",
  "params": {
    "result": {
      "context": {
        "slot": 5207624
      },
      "value": "receivedSignature"
    },
    "subscription": 24006
  }
}