Estimate ERC20 Token Transfer

Overview

This API endpoint allows you to estimate the gas and fees required for transferring ERC20 tokens from an account. It returns a hash that can be used to track the user operation.

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

Request Body Parameters

• accountId (required): The unique identifier of the account.
• tokenAddress (required): The contract address of the ERC20 token to transfer.
• to (required): The recipient's wallet address.
• amount (required): The amount of tokens to transfer (in smallest unit).

Example Request Body

{
  "accountId": "67959f7927373a6808679de2",
  "tokenAddress": "0x....",
  "to": "0x....",
  "amount": "1000000000000"
}

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": "67959f7927373a6808679de2",
    "tokenAddress": "0x....",
    "to": "0x....",
    "amount": "1000000000000"
}' {{BASE_URL}}/api/v1/userOp/sendToken/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": "0xbf16e7e66135aa1622c281cf50216c481fa0b423891815dcb257cc73945413fd",
        "userOpId": "675a5865461f4da1b170557a",
        "validUntil": 1733975917
    }
}