Simple cross-channel discord posting

messenger.py

import discord
import logging


CHANNELS = (123, 456)
TOKEN = 'TOKEN_GOES_HERE'

logging.basicConfig(level=logging.INFO)


cl = discord.Client()


async def get_wh(ch):
    existing = await ch.webhooks()
    if existing:
        return existing[0]
    return await ch.create_webhook(name='interguild')


async def forward(wh, mes):
    if mes.author.bot:
        return
    name = mes.author.name
    av = mes.author.avatar_url
    text = mes.content
    if not text:
        return
    await wh.send(content=text, username=name, avatar_url=av)


@cl.event
async def on_ready():
    global ch1, ch2
    ch1 = cl.get_channel(CHANNELS[0])
    ch2 = cl.get_channel(CHANNELS[1])
    act = discord.Activity(
        name='messages.',
        type=discord.ActivityType.listening
    )
    await cl.change_presence(activity=act)
    print('Ready!')


@cl.event
async def on_message(message):
    if message.author.id == cl.user.id:
        return
    if cl.user.id in [i.id for i in message.mentions]:
        await message.channel.send(
            'Hi there! I\'m a simple messenger with no commands.'
        )
    if message.channel.id == ch1.id:
        ch = ch2
    elif message.channel.id == ch2.id:
        ch = ch1
    else:
        return await cl.process_commands(message)
    wh = await get_wh(ch)
    await forward(wh, message)
    await cl.process_commands(message)


cl.run(TOKEN)