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Problem connecting Ethereum WebSocket to Binance

Overview

Problems connecting to the Binance WebSocket API can be annoying. In this article, we will look at possible causes and solutions for establishing a successful Ethereum WebSocket connection to the Binance API.

Sample code

The code snippet you provided is almost correct:

from websocket import create_connection
ws = create_connection('wss://api.binance.com/api/v3 WebSocketSockets', options={'heartbeat_interval':60*1000});

This establishes a connection to Binance’s WebSocket API endpoint, but there are some potential issues that could cause connection issues:

• Incorrect WebSocket Protocol: Make sure you are using the correct WebSocket protocol: wss (WebSocket Secure) instead of ws.

• Timeout or handshake issue: Ethereum WebSocket connections can time out if they are not handled properly. You can use a library like websocket-asyncio to handle timeouts and retries:

import asyncio
async def connect_to_binance():
async with websocket.AsyncClient() as ws:
while True:
try:





Sending a heartbeat message
await ws.send(b'heartbeat')

Waiting for the connection to be established (10 ms)
await asyncio.sleep(0.01)
except websocket.WebSocketBadStatusException as e:
if e.status == 400 : 
Bad request
print(f"Failed to establish WebSocket connection: {e}")

• WebSocket Handshake Issue: Ethereum’s WebSocket implementation may not conform to the standard WebSocket protocol correctly, which may cause issues with handshake errors or slow connections.

Solutions and troubleshooting

• Check the Binance API documentation for any specific requirements or updates to the WebSocket API.

• Test your code in a local environment before deploying it in a production environment.

• Increase the WebSocket heartbeat interval: Try setting the heartbeat_interval parameter to a larger value (eg 60 seconds) to reduce timeout issues.

• Use the websocket-asyncio' type library with retry mechanisms to handle timeouts and retries:

import asyncio
async def connect_to_binance():
async with websocket.AsyncClient() as ws:
while True:
try:

Sending a heartbeat message
await ws.send(b'heartbeat')

Waiting for the connection to be established (10 ms)
await asyncio.sleep(0.01)

Send a WebSocket message (for example, "Hello Binance!")
ws.send(b'hello binance')
except websocket.WebSocketBadStatusException as e:
if e.status == 400 : 
Bad request
print(f"Failed to Establish WebSocket Connection: {e}")

“python

import asyncio

async def connect_to_binance():

try:

async with websocket.AsyncClient() as ws:

while True:

try:

Send a heartbeat message

await ws.send(b’heartbeat’)

Waiting for the connection to be established (10 ms)

await asyncio.sleep(0.01)

Send a WebSocket message (eg “Hello Binance!”)

ws.send(b’hello binance’)

except websocket.WebSocketBadStatusException as e:

if e.