I’m trying to set up a webhook for my Telegram bot using a self-signed SSL certificate. I know that Telegram now supports custom certificates, but I’m not sure about the proper way to implement this. What’s the correct method to upload and configure my own certificate file when establishing the webhook connection? I need to understand the specific steps and parameters required to make this work with Telegram’s API. Any guidance on the certificate format and upload process would be really helpful.
To configure a Telegram bot webhook with a custom SSL certificate, you need to use the setWebhook method. You’ll send a POST request that includes your .pem file as multipart/form-data alongside your webhook URL. Ensure that your certificate is in PEM format and that its Common Name matches your webhook domain. It’s crucial that the private key on your server is correctly set up, as Telegram will validate it during webhook communication. Format your API request as follows: https://api.telegram.org/bot<token>/setWebhook?url=<your_url> with the certificate included in the form data. If intermediate certificates are involved, confirm that your certificate chain is complete to prevent webhook rejections.
I faced similar issues too! Double-check if your endpoint is returning a 200 response when Telegram pings it. Also, ensure your pem file is clean; extra spaces or line breaks can cause problems. Took me hours to figure that out!
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