Simple program for connection to litecoin nodes.

main.py

import time
import socket
import struct
import random
import hashlib
import dns.resolver
import ipaddress
from messages import *

# list of hardcoded in chainparams.cpp dns seeders
litecoin_nodes = [
    'seed-a.litecoin.loshan.co.uk',
    'dnsseed.thrasher.io',
    'dnsseed.litecointools.com',
    'dnsseed.litecoinpool.org',
    'dnsseed.koin-project.com'
]



# get list of nodes
ip_list = []
    for node in litecoin_nodes:
        try:
            answers = dns.resolver.query(node)
            for res in answers:
                ip_list.append(res.address)
        except:
            continue
            
ip_list = list(set(ip_list))

# trying to connect to every node
# sending "version" message to every node
for num, ip in enumerate(ip_list):
        if type(ipaddress.ip_address(ip)) == ipaddress.IPv6Address:
            addr_family = socket.AF_INET6
        else:
            addr_family = socket.AF_INET

        try:
            with socket.socket(addr_family, socket.SOCK_STREAM) as sock:
                sock.settimeout(5)
                sock.connect((ip, 9333))
                sock.send(makeMessage("version", versionMessage()))
                # catch version and verack message
                sock.recv(1024)
        except:
            continue

messages.py

import time
import socket
import struct
import random
import hashlib

def makeMessage(cmd, payload):
    magic = b'\xfb\xc0\xb6\xdb' # litecoin mainnet magic number
    command = str.encode(cmd + (12 - len(cmd)) * "\00")
    length = struct.pack("I", len(payload))
    check = hashlib.sha256(hashlib.sha256(payload).digest()).digest()[:4]
    return magic + command + length + check + payload

def versionMessage():
    version = struct.pack("i", 70015)
    services = struct.pack("Q", 0)
    timestamp = struct.pack("q", int(time.time()))

    addr_recv = struct.pack("Q", 0)
    addr_recv += struct.pack(">16s", b"127.0.0.1")
    addr_recv += struct.pack(">H", 9333)

    addr_from = struct.pack("Q", 0)
    addr_from += struct.pack(">16s", b"127.0.0.1")
    addr_from += struct.pack(">H", 9333)

    nonce = struct.pack("Q", random.getrandbits(64))
    user_agent = struct.pack("B", 0) # Anything
    height = struct.pack("i", 0) # Block number, doesn't matter

    payload = version + services + timestamp + addr_recv + addr_from + nonce + user_agent + height

    return payload

Hi!
I am interesting in your project. Could you make transactions with Litecoin? I tried the same way and I could not. I don`t know why because their have same protocols, it should be easy.