I can’t find the way to post a message with files attached. I’ve verified that I’m able to upload files using files.upload, which gives me the id and permalink.

I’ve found examples in other posts on how to “reference” the file to a message by linking it using its permalink, which adds a preview of the files but it can be cancelled by the user (a so-so solution).

And I’ve tested that, if a message has files attached, you can change those using the chat.update end point.

However, I do not find a way to post a message composed of several blocks and with files attached to it (not permalinked). I thought I may be able to do it using the files IDs once uploaded somehow but it does not seem to work. Has anyone archieved this?