Ethereum: Binance Futures with libwebsockets 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 difficult to use Yair Gadelov’s popular WebSockets wrapper project. However, in this article, we will explore why Binance Futures with libwebsockets is not working and propose alternative solutions.
The problem
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Binance Futures provides a WebSocket API to get 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 the 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.
Comparing Libwebsockets and Yair Gadelov’s Websockets Wrapper Project
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Although both libraries offer similar functionality, there are a few differences between them:
- libwebsockets is a more general-purpose library that supports multiple protocols, including WebSocket.
- 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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The official Binance Futures WebSocket API does not use the standard libwebsockets API. Instead, it uses a custom implementation specific to their protocol.
To establish a connection to the Binance Futures WebSocket API using libwebsockets, we need to modify Yair Gadelov’s websockets wrapper project to support 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 an implementation of the secure SSH protocol that can be used for WebSocket communication.
Here is an example of how you can use “libssh2” to establish a connection to the 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* sex;
ssh2_session_init(&sex);
// Connect to the Binance Futures WebSocket API
ssh2_channel_open_connect(host, port, 0, &sex);
}
// Establish a WebSocket connection to Binance Futures
void establish_connection(ssh2_session sex, char channel_name) {
if (ssh2_channel_open_session(sex) == -1) {
std::cerr << "Failed to open channel: " << ssh2_channel_error(sex) << std::endl;
return;
}
// Use the established connection for WebSocket communication
}
int main() {
const char *host = “bif.binance.
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