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sendTokenPaymasterUserOp

This method combines the preparation and sending of a user operation that uses token paymaster for gas payment. It handles the entire flow of:

  1. Preparing the user operation with token paymaster configuration
  2. Adding token approval if needed
  3. Signing and sending the operation

Usage

example.ts
import { createSmartAccountClient } from "./nexusClient"
 
const hash = await nexusClient.sendTokenPaymasterUserOp({
  calls: [
    {
      to: recipientAddress,
      value: 1n,
      data: "0x"
    }
  ],
  feeTokenAddress: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48", // USDC address
})

Parameters

  • calls { to: Address, data: Hex, value: bigint }[]: Array of transactions to be executed
  • feeTokenAddress Address: The ERC20 token address to be used for paying gas fees
  • customApprovalAmount bigint (optional): Custom approval amount for the token paymaster
  • maxFeePerGas bigint (optional): Maximum fee per gas unit
  • maxPriorityFeePerGas bigint (optional): Maximum priority fee per gas unit

Response

  • Promise<Hash>: Returns the transaction hash of the submitted user operation

Error Handling

The method will throw an error if:

  • The client account is not properly configured
  • The paymaster context is missing or invalid
  • Token approval fails
  • User operation submission fails

Related Methods