$ npm install ethers @turnkey/ethers

import { ethers } from "ethers";
import { TurnkeySigner } from "@turnkey/ethers";
import { TurnkeyClient } from "@turnkey/http";
import { ApiKeyStamper } from "@turnkey/api-key-stamper";

async function main() {
  const network = "goerli";
  const provider = new ethers.providers.InfuraProvider(network);

  const turnkeyClient = new TurnkeyClient(
    {
      baseUrl: "https://api.turnkey.com",
    },
    // This uses API key credentials.
    // If you're using passkeys, use `@turnkey/webauthn-stamper` to collect webauthn signatures:
    // new WebauthnStamper({...options...})
    new ApiKeyStamper({
      apiPublicKey: "...",
      apiPrivateKey: "...",
    }),
  );

  // Initialize a Turnkey Signer
  const turnkeySigner = new TurnkeySigner({
    client: turnkeyClient,
    organizationId: "...",
    signWith: "...",
  });

  // Connect it with a Provider (https://docs.ethers.org/v6/api/providers/)
  const connectedSigner = turnkeySigner.connect(provider);

  const chainId = await connectedSigner.getChainId();
  const address = await connectedSigner.getAddress();
  const balance = await connectedSigner.getBalance();
  const transactionCount = await connectedSigner.getTransactionCount();

  console.log(`Network\n\t${network} (chain ID ${chainId})`);
  console.log(`Address\n\t${address}`);
  console.log(`Balance\n\t${String(balance)}`);
  console.log(`Transaction count\n\t${transactionCount}`);

  const transactionRequest = {
    to: "0x2Ad9eA1E677949a536A270CEC812D6e868C88108",
    value: ethers.utils.parseEther("0.0001"),
    type: 2,
  };

  const signedTx = await connectedSigner.signTransaction(transactionRequest);

  console.log(`Signed transaction\n\t${signedTx}`);

  if (balance.isZero()) {
    let warningMessage =
      "\nWarning: the transaction won't be broadcasted because your account balance is zero.\n";
    if (network === "goerli") {
      warningMessage +=
        "Use https://goerlifaucet.com/ to request funds on Goerli, then run the script again.\n";
    }

    console.warn(warningMessage);
    return;
  }

  const sentTx = await connectedSigner.sendTransaction(transactionRequest);

  console.log(
    `Transaction sent!\n\thttps://${network}.etherscan.io/tx/${sentTx.hash}`,
  );
}

main().catch((error) => {
  console.error(error);
  process.exit(1);
});