subdomain.ts

import { sha3 } from "web3-utils";
import contractAbi from "./abi/ENS.json";
const namehash = require("@ensdomains/eth-ens-namehash");

// Config
/* -------------------------------------------------------------------------- */
const secretkey ="<0x123456>"
const INFURA_API_KEY ="<aaaaa>"

// Definitely long strings (ex. phiphi0320102081028) causes this problem 0x problem.
// Only happen testnet(ex.goerli)?
const subdomain ="phi0320102081028" 

const ENSAddress = "0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e";
const resolverAddress = "0x4b1488b7a6b320d2d721406204abc3eeaa9ad329";
/* -------------------------------------------------------------------------- */

const providerUrl = `https://goerli.infura.io/v3/${INFURA_API_KEY}`;
const provider = new ethers.providers.JsonRpcProvider(providerUrl);

// this owner has testdemo.eth owner
const wallet = new ethers.Wallet(secretkey).connect(provider);

const contract = new ethers.Contract(ENSAddress, contractAbi.abi, wallet);
const tx = await contract.setSubnodeRecord(
      namehash.hash("testdemo.eth"),
      sha3(subdomain),
      params.address,
      resolverAddress,
      0,
    );