我正在尝试使用NodeJS让Coinbase工作
出现以下错误：
跨来源请求被阻止：同源策略不允许读取位于http：//localhost：3000/create-payment的远程资源。（原因：CORS请求未成功）。状态代码：（无效）。
我试过下载那些应该允许它的Corse插件之一，但我就是不能让它工作。
Javascript代码：

<script> const button = document.getElementById('order');

button.addEventListener('click', event => { const form = document.getElementById('payment-form');

event.preventDefault(); // Prevent the form from submitting to the server 
form.submit(); 
const price = "<?php echo $price; ?>"; 
const amount = document.getElementById('quantitymills').value;
const total_price = document.getElementById('inputd').value; 
const fname = document.getElementById('fname').value; 
const email = document.getElementById('email').value;


fetch('http://localhost:3000/create-payment', { 
method: 'POST', 
body: JSON.stringify({ price }), 
body: JSON.stringify({ amount }), 
body: JSON.stringify({ total_price }), 
body: JSON.stringify({ name }),
body: JSON.stringify({ email }), 
headers: { 
'Content-Type': 'application/json',
 }
 }) 
.then(response => response.json())
.then(payment => { 
// Do something with the payment details
 console.log(payment);
 }) 
.catch(error => console.error(error)); });

节点代码：

const express = require('express'); 
const axios = require('axios');
const bodyParser = require('body-parser');
const mysql = require('mysql2'); 
const app = express();

// Parse application/x-www-form-urlencoded requests app.use(bodyParser.urlencoded({ extended: false }));

// Connect to the database 
const db = mysql.createConnection({ 
 host: 'localhost',
 user: 'root',
 password: '',
 database: 'coinbase' });

// Create a payment

app.post('http://localhost:3000/create-payment', async (req, res) => { try { 
// Make an API request to create the payment 
const response = await axios.post( 
'https://api.commerce.coinbase.com/charges',
{ 
name: 'Product one', 
description: 'Product one',
local_price: { 
amount: req.body.total_price,
currency: 'USD' }, 
metadata: {}, 
pricing_type: 'fixed_price',
redirect_url: 'http://localhost/index.php' 
},
{ 
headers: 
{ 'X-CC-Api-Key': 'myapikey' } }

);

// Store the payment URL in the database
const payment = {
  url: response.data.hosted_url,
  amount: req.body.total_price,
  currency: 'USD',
  status: 'pending'
};
db.query('INSERT INTO payments SET ?', payment, (error, result) => {
  if (error) throw error;
  res.send(payment);
});

} catch (error) { console.error(error); } });

app.listen(3000, () => { console.log('Server listening on port 3000'); });

这可能是我的代码中的其他错误，我仍然是新的编码，可能在另一个领域搞砸了不太确定。
任何帮助将不胜感激!
Downloading cors plugin tried 127.0.0.1 instead of localhost tried switching ports