# TODO: guess it's better to have a function that "downloads, checks file-presence and signature, and returns true/false" whether the file is ok
# Function will check if file exists (otherwise try to download the file - if failed and file still doesn't exist, complain and exit the script)
# TODO: guess it's better to have a function that "downloads, checks file-presence and signature, and returns true/false" whether the file is ok
# Function will check if file exists (otherwise try to download the file - if failed and file still doesn't exist, complain and exit the script)