test.js

const tx = curWallet.methods.transfer({
  toAddress: domainAddress,
  amount: Ton.toNano('0.05').toString(),
  seqno: seqno,
  payload, 
  sendMode: 3,
  secretKey
});

const queryMsg = await tx.getQuery();
const boc = Base64.encodeBytes(await queryMsg.toBoc(false));

await sendApi.sendBoc({ sendBocRequest: { boc } });