Ethereum: Binance Futures not working with libwebsockets
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Introduction
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If you are building a C++ application that requires real-time price updates from Binance Futures via WebSockets, it can be a challenge to use Yair Gadelov’s popular websockets wrapper project. However, in this article, we will analyze why Binance Futures libwebsockets is not working and provide alternative solutions.
The Problem
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Binance Futures provides a WebSocket API to obtain real-time market data. The standard WebSocket API uses the endpoint “wss://api.binance.com/ws”, which can be accessed using JavaScript or other client-side programming languages. However, due to security restrictions, this endpoint cannot be accessed directly from C++ applications.
To overcome this limitation, we 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 official Binance Futures integration.
Libwebsockets vs Yair Gadelov’s Websockets Wrapper project
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While both libraries offer similar features, there are some differences between them:
- libwebsockets is a more general library that supports multiple protocols, including WebSocket.
- Yair Gadelov’s websockets wrapper project is designed specifically 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 connect to Binance Futures WebSocket API using libwebsockets, we need to modify Yair Gadelov’s websockets wrapper project to match Binance Futures’ custom API.
Workaround
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After researching and experimenting with different libraries, I recommend using the libssh2 library instead of libwebsockets. libssh2 is a secure implementation of the 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* session;
ssh2_session_init(&sess);
// Connecting to the Binance Futures WebSocket API
ssh2_channel_open_connect(host, port, 0, &sess);
}
// Establish a WebSocket connection to Binance Futures
void create_connection(ssh2_session sess, char channel_name) {
if (ssh2_channel_open_session(sess) == -1) {
std::cerr << "Could not open channel: " << ssh2_channel_error(sess) << std::endl;
return;
}
// Use the created connection for WebSocket communication
}
int main() {
const char *host = “bif.binance.
