import { isERC20 } from "thirdweb/extensions/erc20";
import { resolveContractAbi } from "thirdweb/contract";
 
const abi = await resolveContractAbi(contract);
const selectors = abi
  .filter((f) => f.type === "function")
  .map((f) => toFunctionSelector(f));
 
const result = await isERC20(selectors);