有些交易通过联系同时进行

Question

我同时通过联系人发送一些交易。但是块执行其中一个因为两个事务具有相同的nonce（我从getTransactionCount获得）。我该如何解决？

每次创建交易时都会使用此代码：

var token = web3.eth.contract(config.contract.abi).at(config.contract.address);

var payloadData = token.transfer.getData(address, amount);
gasPrice = web3.eth.gasPrice;
gasPriceHex = web3.toHex(gasPrice);
gasLimitHex = web3.toHex(gaslimit);

console.log('Current gasPrice: ' + gasPrice + ' OR ' + gasPriceHex);

nonce = web3.eth.getTransactionCount(config.account.address);
nonceHex = web3.toHex(nonce);
console.log('nonce (transaction count on fromAccount): ' + nonce + '(' + nonceHex + ')');

var rawTx = {
    nonce: nonceHex,
    gasPrice: gasPriceHex,
    gasLimit: gasLimitHex,
    to: config.contract.address,
    from: config.account.address,
    value: '0x00',
    data: payloadData
};

var tx = new Tx(rawTx);
tx.sign(Buffer.from(config.account.privateKey, 'hex'));
var serializedTx = tx.serialize();

web3.eth.sendRawTransaction('0x' + serializedTx.toString('hex'), function (err, hash) {
    if (err) {
       console.log(err);
       console.log(hash);
    }
});