Non-Alchemy chains

import { createBundlerClient } from "viem/account-abstraction";
import { createClient, defineChain, http } from "viem";
import { privateKeyToAccount, generatePrivateKey } from "viem/accounts";
import { toLightAccount } from "@alchemy/smart-accounts";
 
// 1. Define your chain.
const myChain = defineChain({
  id: 12345,
  name: "MyChain",
  nativeCurrency: { name: "Ether", symbol: "ETH", decimals: 18 },
  rpcUrls: {
    default: { http: ["https://rpc.mychain.example.com"] },
  },
});
 
// 2. RPC client + smart account against that chain.
const rpcClient = createClient({ chain: myChain, transport: http() });
const owner = privateKeyToAccount(generatePrivateKey());
const account = await toLightAccount({
  client: rpcClient,
  owner,
  version: "v2.0.0",
});
 
// 3. Bundler client at the third-party bundler RPC.
const bundlerClient = createBundlerClient({
  account,
  client: rpcClient,
  chain: myChain,
  transport: http("https://bundler.mychain.example.com"),
});
 
const hash = await bundlerClient.sendUserOperation({
  calls: [{ to: "0x0000000000000000000000000000000000000000", value: 0n, data: "0x" }],
});