I’ve been trying to create a Telegram bot that automatically forwards messages from one source chat to another target group. My initial effort in Python did not work as expected, and the handler function for new messages seems to not trigger properly. Below is an updated code sample that uses different variable names and structure. I’m looking for insights on why the original auto-forwarding approach might have been failing and how this revised version could help resolve the issue.
import asyncio
from telethon import TelegramClient, events
async def start_bot():
# Replace these with your own credentials
APP_ID = 123456789
APP_HASH = 'new_app_hash_value'
NEW_BOT_TOKEN = 'new_bot_token_here'
# Define IDs for target group and source chat
DEST_GROUP_ID = -100111222333
SOURCE_CHAT_ID = 987654321
bot_client = TelegramClient('relay_bot', APP_ID, APP_HASH)
await bot_client.start(bot_token=NEW_BOT_TOKEN)
@bot_client.on(events.NewMessage(chats=SOURCE_CHAT_ID))
async def forward_message(event):
await bot_client.send_message(DEST_GROUP_ID, event.message.message)
print('Bot is now active and listening for new messages...')
await bot_client.run_until_disconnected()
asyncio.run(start_bot())
In my personal experience, problems with message forwarding often stem from event handling and minor configuration errors. I’ve found that confirming the bot’s API permissions for both chats is imperative, as any restriction can silently block message relays. Moreover, ensuring you correctly initialize and maintain your asynchronous event handlers is a common pitfall; sometimes the event loop might exit or fail to prioritize the handler. I recommend incorporating robust error logging and verifying that the group IDs and tokens are properly set. Testing in a controlled environment helps isolate whether issues are related to code structure or Telegram’s rate limits.
My experience has taught me that when setting up a Telegram bot for message relaying, a critical step is ensuring that the event loop and asynchronous handlers are configured and maintained properly. In one instance, I discovered that subtle misalignments within the event subscription phase could cause the handler function not to trigger, even though the bot was connected. Double-check that your API keys and bot tokens are correctly applied and that the chat ID types match what Telethon expects. Additionally, incorporating error catching and reconnection logic helped to stabilize my bot under varied network conditions.
The code you posted is a good approach, but a few factors could be affecting message forwarding. From experience, ensuring that the bot has the necessary permissions in both source and destination chats is crucial. Sometimes the issue may also stem from missing synchronization between events and the server’s reply. It’s often helpful to debug by printing out the message content upon reception. Additionally, confirming that chat IDs are correctly formatted as integers and negative values for groups can prevent misrouting of forwarded messages.
try adding some debug prints in the event function to see if messages are ever caught. also verfy that the bot’s perms in both chats are correct. sometimes a hiccup in id formatting or token permissions can cause this issue. good luck, mate!