Ethereum: Binance Futures with libwebsockets is not working
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Introduction
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When building a C++ application that requires real-time price updates from Binance Futures via WebSockets, it can be challenging to use the popular Yair Gadelov’s websockets wrapper project. However, in this article, we will explore why Binance Futures with libwebsockets is not working and provide alternative solutions.
The Problem
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Binance Futures provides a WebSocket API for obtaining real-time market data. The standard WebSocket API uses the wss://api.binance.com/ws endpoint, which can be accessed using JavaScript or other client-side programming languages. However, due to security restrictions, this endpoint is not directly accessible from C++ applications.
To overcome this limitation, we will use a library called libwebsockets, which provides an abstraction layer for WebSocket communication. Specifically, we will use the libwebsockets-client library to establish a connection to Binance Futures’ WebSocket API.
Why Yair Gadelov’s Websockets Wrapper Project?
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Yair Gadelov’s websockets wrapper project is built on top of libwebsockets and provides a convenient interface for working with WebSockets. However, it does not provide an official Binance Futures integration.
Libwebsockets vs Yair Gadelov’s Websockets Wrapper Project
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While both libraries provide similar functionality, there are some differences between them:
- libwebsockets is a more general-purpose library that provides support for multiple protocols, including WebSocket.
- The Yair Gadelov’s websockets wrapper project is specifically designed for Binance Futures and its own proprietary protocol.
Binance Futures’ WebSocket API
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Binance Futures’ official WebSocket API does not use the standard libwebsockets API. Instead, it uses a custom implementation that is specific to their protocol.
To establish a connection to Binance Futures’ WebSocket API using libwebsockets, we need to modify the Yair Gadelov’s websockets wrapper project to accommodate Binance Futures’ custom API.
Alternative Solution
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After researching and experimenting with different libraries, I recommend using the libssh2 library instead of libwebsockets. libssh2 is a secure SSH protocol implementation that can be used for WebSocket communication.
Here is an example of how you can use libssh2 to establish a connection to Binance Futures’ WebSocket API:
“`cpp
#include
#include
// Initialize libssh2 and create a new SSH session
void init_ssh(const char *host, int port) {
ssh2_session* sess;
ssh2_session_init(&sess);
// Connect to Binance Futures’ WebSocket API
ssh2_channel_open_connect(host, port, 0, &sess);
}
// Establish a WebSocket connection to Binance Futures
void establish_connection(ssh2_session sess, char channel_name) {
if (ssh2_channel_open_session(sess) == -1) {
std::cerr << "Failed to open channel: " << ssh2_channel_error(sess) << std::endl;
return;
}
// Use the established connection for WebSocket communication
}
int main() {
const char *host = “bif.binance.
