How to Pay Gas in ERC-20 Tokens | EIP-7702

Smart EOAs via EIP-7702

Enable users to pay gas in ERC-20 tokens using any supported ERC-20 token on Candide Paymaster.

Create a new app on the dashboard and copy the Paymaster URL to your .env file
Select an ERC-20 token for gas payment and add its address to the .env file (this example uses CTT)

If you would like to see a full example, you can reference it here.

index.ts
.env

import {
  ...
  Erc7677Paymaster,
} from "abstractionkit";

const paymasterRPC = process.env.PAYMASTER_URL as string;
const tokenAddress = process.env.TOKEN_ADDRESS as string;

const paymaster = new Erc7677Paymaster(paymasterRPC)

const { userOperation: tokenOp, tokenQuote } = await paymaster.createPaymasterUserOperation(
    smartAccount, // = new Simple7702AccountV09(eoaDelegator.address)
    userOperation,
    bundlerUrl,
    { token: tokenAddress },
)
userOperation = tokenOp;
const cost = tokenQuote?.tokenCost;
console.log("This useroperation may cost up to : " + cost + " in the token")
console.log("Please fund the sender account: " + userOperation.sender + " with at least " + cost + " of the token")

PAYMASTER_URL=https://api.candide.dev/public/v3/11155111
TOKEN_ADDRESS=0xFa5854FBf9964330d761961F46565AB7326e5a3b # CTT address on sepolia

info

Don't forget to fund the account with ERC-20s to pay for gas. We are using Candide Test Tokens (CTT) for this example. Get test tokens from our dashboard faucet - supporting CTT and USDT on testnet.