Sending Multiple VT Transactions with Modified Nonce

send.js

const Caver = require('caver-js')
const caver = new Caver('https://api.baobab.klaytn.net:8651')

const sender = caver.klay.accounts.wallet.add('your_private_key');
const recipient = 'recipient_address';

const x = async () => {
    const account = await caver.klay.getAccount(sender.address);
    const startingNonce = account.account.nonce;
    console.log(startingNonce);

    const since = new Date();
    console.log(since);
    for (var i = 0; i < 10; i++) {
        caver.klay.sendTransaction({
            nonce: startingNonce + i,
            type: 'VALUE_TRANSFER',
            from: sender.address,
            to: recipient,
            gas: '300000',
            value: caver.utils.toPeb('0.1', 'KLAY')
        })
        .on('transactionHash', function (hash) {
            console.log('hash -> ', hash)
        })
        .on('receipt', function (receipt) {
            caver.klay.getAccount(sender.address).then((v) => {
                console.log(v.account.nonce);
            });
        })
        .on('error', console.error);
    }    
    const now = new Date();
    console.log(now - since + ' ms');
};
x();