How to use Credit Mode

import { createSmartAccountClient } from "permissionless"
import { Address, Hex, createPublicClient, http, parseEther, toHex } from "viem"
import { sepolia } from "viem/chains"
import { privateKeyToAccount } from "viem/accounts"
import { entryPoint07Address } from "viem/account-abstraction"
import { createPimlicoClient } from "permissionless/clients/pimlico"
import { toSimpleSmartAccount } from "permissionless/accounts"
 
import "dotenv/config"
import { getPimlicoUrl, MagicSpend } from "./magic-spend"
 
const RPC_URL = "https://11155111.rpc.thirdweb.com"
const ETH: Address = "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE"
const amount = "0.001" // 0.001 ETH
 
const PRIVATE_KEY = process.env.ACCOUNT_PRIVATE_KEY
 
if (PRIVATE_KEY === undefined) {
	throw new Error("ACCOUNT_PRIVATE_KEY env var is required")
}
 
const pimlicoUrl = getPimlicoUrl(sepolia.id)
 
export const publicClient = createPublicClient({
	transport: http(RPC_URL),
	chain: sepolia,
})
 
const pimlicoClient = createPimlicoClient({
	transport: http(pimlicoUrl),
	chain: sepolia,
	entryPoint: {
		address: entryPoint07Address,
		version: "0.7",
	},
})
 
// This is the address of the account that owns the stake
const signer = privateKeyToAccount(PRIVATE_KEY as Hex)
console.log(`Signer address: ${signer.address}`)
 
const simpleAccount = await toSimpleSmartAccount({
	client: publicClient,
	owner: signer,
	entryPoint: {
		address: entryPoint07Address,
		version: "0.7",
	},
})
 
const smartAccountClient = createSmartAccountClient({
	account: simpleAccount,
	chain: sepolia,
	bundlerTransport: http(pimlicoUrl, {
		timeout: 60_000,
	}),
	userOperation: {
		estimateFeesPerGas: async () => {
			return (await pimlicoClient.getUserOperationGasPrice()).fast
		},
	},
	paymaster: pimlicoClient,
})
 

 
const magicSpend = new MagicSpend()
 
const [contract, calldata] = await magicSpend.sponsorWithdrawal({
	type: "credits",
	data: {
		token: ETH,
		amount: toHex(parseEther(amount)),
		recipient: simpleAccount.address,
		signature: "0x",
	},
})

// Send user operation and withdraw funds
// You can add subsequent calls after the withdrawal, like "buy NFT on OpenSea for ETH"
const userOpHash = await smartAccountClient.sendUserOperation({
	account: simpleAccount,
	calls: [
		{
			to: contract,
			value: parseEther("0"),
			data: calldata,
		},
	],
})
 
console.log(`Userop hash: ${userOpHash}`)
 
const receipt = await pimlicoClient.waitForUserOperationReceipt({
	hash: userOpHash,
})
 
console.log(`Transaction hash: ${receipt.receipt.transactionHash}`)