Example send ETH token using Web3.js

sendETHToken.js

const Web3 = require("web3");
import Tx from "ethereumjs-tx";
import { usdtABI, usdtAddress } from "../../helpers/currencies/usdt";
import { ethHost, net, chainId } from "../../ethhost";
import fs from "fs";

const web3 = new Web3(new Web3.providers.HttpProvider(ethHost));

const USDTContract = new web3.eth.Contract(usdtABI, usdtAddress, {
  from: sendFrom,
});

/*  obtiene simbolo del contrato del token */
// const balanceUSDT = await USDTContract.methods.symbol().call()

/*  obtiene balance de ethers */
const etherBalance = await web3.eth.getBalance(sendFrom);

/* obtiene balance de tokens */
const sendFromBalanceUSDT = await USDTContract.methods
  .balanceOf(sendFrom)
  .call();

console.log("receiver: " + toAddress);
console.log("sender: " + sendFrom);
console.log("amount: " + amount);
console.log(
  "amount (wei): " + web3.utils.toWei(amount.toString(), "ether")
);
console.log("sender balance: " + sendFromBalanceUSDT, "tokens wei");
console.log(
  "sender balance: " +
    web3.utils.fromWei(sendFromBalanceUSDT, "ether") +
    "tokens"
);
console.log(
  "sender balance: " + web3.utils.fromWei(etherBalance, "ether"),
  "ethers"
);

if (etherBalance <= 0) {
  return res.status(409).send({
    type: "insufficient-funds",
    msg: `No cuenta con ningun ether en su Wallet`,
  });
}

if (sendFromBalanceUSDT <= 0) {
  return res.status(409).send({
    type: "insufficient-funds",
    msg: `No cuenta con ningun Tether en su Wallet`,
  });
}

// if (web3.utils.fromWei(sendFromBalanceUSDT, "ether") <= amount) {
//   return res.status(409).send({
//     type: "insufficient-funds",
//     msg: `El monto a enviar supera su saldo`,
//   });
// }

/* Obtiene el nonce para la transaccion */
const txCount = await web3.eth.getTransactionCount(sendFrom);

/* Encondifica la transaccion */
// const data = USDTContract.methods
//   .transfer(
//     toAddress,
//     web3.utils.toHex(web3.utils.toWei(amount.toString(), "ether")) // en wei
//   )
//   .encodeABI();

/* Estima cuanto gas se necesita para la transaccion */
// const estimatedGas = await USDTContract.methods
//   .transfer(toAddress, amount)
//   .estimateGas({
//     from: sendFrom,
//     data: data,
//     to: toAddress,
//   });

/* obtiene el precio actual del gas */
// const gasPrice = await web3.eth.getGasPrice();

/* obtiene GAS limit del ultimo block minado */
// const latestBlock = await web3.eth.getBlock("latest");
// const gasLimit = latestBlock.gasLimit / latestBlock.transactions.length;
await web3.eth.personal.unlockAccount(sendFrom, "123456789", 15000);
const data = await USDTContract.methods
  .transfer(
    toAddress,
    web3.utils.toHex(web3.utils.toWei(amount.toString(), "ether")) // en wei
  )
  .send({ from: sendFrom })
  .on("transactionHash", async (hash) => {
    console.log("transactionHash", hash);
    /* GUARDADO EN DB */
    const sendTransactionProps = {
      userId: userId,
      // tx: resulTx.transactionHash,
      tx: hash,              
      category: "send",
      fromAddress: sendFrom,
      toAddress: toAddress,
      amount: amount,
      fee: 0,
      inner: 0,
      agenteBTCFee: basicFee,
      createdAt: Date.now(),
      modifiedAt: Date.now(),
      currency: "USDT",
      history: [{ date: Date.now(), state: "DELIVERED" }],
      state: "DELIVERED",
    };
    const sendTransaction = new Transaction(sendTransactionProps);
    const st = await sendTransaction.save();

    const feeProps = {
      transactionId: st._id,
      category: "SEND",
      currency: "USDT",
      amount: st.agenteBTCFee,
    };
    const sendFeeObj = new Fee(feeProps);
    await sendFeeObj.save();

    wallet.balance =
      wallet.balance - parseFloat(basicFee) - parseFloat(amount);
    await wallet.save();

    console.log("enviar resultado")
    return res.status(200).send({
      type: "success",
      msg: "Transaccion en proceso",
      response: sendTransaction,
    });
    console.log("no envia")
  })
  .on("receipt", function (receipt) {
    console.log("receipt");
  })
  // .on("confirmation", function (confirmationNumber, receipt) {
  //   console.log("confirmation");
  // })
  .on("error", function (error, receipt) {
    console.log(error);
  });
//https://stackoverflow.com/questions/46902093/sending-erc20-tokens?noredirect=1&lq=1
// https://piyopiyo.medium.com/how-to-send-erc20-token-with-web3-js-1-0-0-95164b32e9a6
console.log("data",data);