如何使用 web3 在 nodejs 中连接币安网络

Question

I tried to connect with binance testnet in Nodejs. This is my code.

const Web3 = require('web3');
const web3 = new Web3(new Web3.providers.HttpProvider('https://data-seed-prebsc-1-s2.binance.org:8545'));

But I got the error code like

Error: The current provider doesn't support subscriptions: HttpProvider
    at Timeout._onTimeout (E:\test\share1\node_modules\web3-core-subscriptions\lib\subscription.js:176:24)

Please let me know how I can fix it.

Answer 1

HTTP provider, does not support subscriptions.

Source: https://web3js.readthedocs.io/en/v1.7.0/web3.html#value

---

If you want to use subscriptions, you need to connect to a websocket node - not HTTP.

There is a list of 3rd party node providers recommended by Binance in their docs page . Some of them support websocket connection as well.

Answer 2

The above web3 part works fine. Please try the below lines,

var Web3 = require('web3');
const web3_bsc = new Web3('https://data-seed-prebsc-1-s2.binance.org:8545');

Then using the web3_bsc, access the functions in your contract or perform any functions that web3 supports.