Sign Transaction Hash

Overview

This API endpoint allows you to generate a hash for signing a transaction from an account. It returns a hash that can be used to track the user operation.

• HTTP Method: POST
• Endpoint: {{BASE_URL}}/v1/userOp/signTransaction/hash

Request Body Parameters

• accountId (required): The unique identifier of the account.
• to (required): The recipient's wallet address.
• value (required): The value to be sent in the transaction (in smallest unit).
• callData (required): The data to be sent with the transaction, in hexadecimal format.

Example Request Body

{
  "accountId": "6781076148304060fd5e0dd6",
  "to": "0x...",
  "value": "0",
  "callData": "0x....."
}

Request

Request Headers

• X-CLIENT-ID: (required): Client ID which was generated when registering in Xellar Account Abstraction API Service Dashboard.
• X-SIGNATURE: (required): Calculated signature, please refer to Authorization section.
• X-TIMESTAMP: (required): Request timestamp in RFC3339 format.

Example Request Syntax

curl -X POST -H "Content-Type: application/json" \
-H "x-client-id: $YOUR_CLIENT_ID" \
-H "x-signature: $CALCULATED_SIGNATURE" \
-H "x-timestamp: $TIMESTAMP" \
-d '{
    "accountId": "6781076148304060fd5e0dd6",
    "to": "0x...",
    "value": "0",
    "callData": "0x....."
}' {{BASE_URL}}/v1/userOp/signTransaction/hash

Response

The response will include a JSON object with the following properties:

• status (number): The HTTP status code of the response (e.g., 200 for success).
• message (string): A message providing additional information about the operation.
• data (object): An object containing the operation details.
• data.hash (string): The hash of the user operation.
• data.userOpId (string): Unique identifier for the user operation.
• data.validUntil (number): Timestamp until which the estimation is valid.

Example Response

{
    "status": 200,
    "message": "success",
    "data": {
        "hash": "0x68cf969945d50ec231137a7ce53dbfc46fbee3dde6b3bd0524d79c347374070b",
        "userOpId": "677cfa70ec2af072fe4312ec",
        "validUntil": 1736245624
    }
}